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[PATCH v48 5/7] Fix a few problems in index build progress reporting.
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* [PATCH v48 5/7] Fix a few problems in index build progress reporting.
@ 2026-03-27 15:50 Álvaro Herrera <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Álvaro Herrera @ 2026-03-27 15:50 UTC (permalink / raw)

First, index_build() should not update the progress when being driven by
REPACK, because the progress reporting infractructure cannot handle status of
two commands at the same time. So far, REPACK with the CONCURRENTLY option
neglected this problem altogether, but even the existing REPACK wasn't
consistent enough: even if the 'progress' variable in repack_index() was
false, it didn't pass the value to index_build().

Second, REPACK (CONCURRENTLY) should not set PROGRESS_REPACK_PHASE to
PROGRESS_REPACK_PHASE_FINAL_CLEANUP in rebuild_relation() because it calls
finish_heap_swap() anyway (via rebuild_relation_finish_concurrent()), which
does the same thing.
---
 src/backend/bootstrap/bootstrap.c |  2 +-
 src/backend/catalog/heap.c        |  3 ++-
 src/backend/catalog/index.c       | 22 ++++++++++++++++++----
 src/backend/catalog/toasting.c    |  3 ++-
 src/backend/commands/indexcmds.c  |  1 +
 src/include/catalog/index.h       |  4 +++-
 6 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/src/backend/bootstrap/bootstrap.c b/src/backend/bootstrap/bootstrap.c
index 38ef683d4c7..60fb7051830 100644
--- a/src/backend/bootstrap/bootstrap.c
+++ b/src/backend/bootstrap/bootstrap.c
@@ -1183,7 +1183,7 @@ build_indices(void)
 		heap = table_open(ILHead->il_heap, NoLock);
 		ind = index_open(ILHead->il_ind, NoLock);
 
-		index_build(heap, ind, ILHead->il_info, false, false);
+		index_build(heap, ind, ILHead->il_info, false, false, false);
 
 		index_close(ind, NoLock);
 		table_close(heap, NoLock);
diff --git a/src/backend/catalog/heap.c b/src/backend/catalog/heap.c
index 5748aa9a1a9..ae6b7cda3dd 100644
--- a/src/backend/catalog/heap.c
+++ b/src/backend/catalog/heap.c
@@ -3570,7 +3570,8 @@ RelationTruncateIndexes(Relation heapRelation)
 
 		/* Initialize the index and rebuild */
 		/* Note: we do not need to re-establish pkey setting */
-		index_build(heapRelation, currentIndex, indexInfo, true, false);
+		index_build(heapRelation, currentIndex, indexInfo, true, false,
+					true);
 
 		/* We're done with this index */
 		index_close(currentIndex, NoLock);
diff --git a/src/backend/catalog/index.c b/src/backend/catalog/index.c
index b86ad73c626..bac8d527ae5 100644
--- a/src/backend/catalog/index.c
+++ b/src/backend/catalog/index.c
@@ -715,6 +715,9 @@ UpdateIndexRelation(Oid indexoid,
  *			already exists.
  *		INDEX_CREATE_PARTITIONED:
  *			create a partitioned index (table must be partitioned)
+ *		INDEX_CREATE_REPORT_PROGRESS:
+ *			update the backend's progress information during index build.
+
  * constr_flags: flags passed to index_constraint_create
  *		(only if INDEX_CREATE_ADD_CONSTRAINT is set)
  * allow_system_table_mods: allow table to be a system catalog
@@ -760,6 +763,7 @@ index_create(Relation heapRelation,
 	bool		invalid = (flags & INDEX_CREATE_INVALID) != 0;
 	bool		concurrent = (flags & INDEX_CREATE_CONCURRENT) != 0;
 	bool		partitioned = (flags & INDEX_CREATE_PARTITIONED) != 0;
+	bool		progress = (flags & INDEX_CREATE_REPORT_PROGRESS) != 0;
 	char		relkind;
 	TransactionId relfrozenxid;
 	MultiXactId relminmxid;
@@ -1276,7 +1280,8 @@ index_create(Relation heapRelation,
 	}
 	else
 	{
-		index_build(heapRelation, indexRelation, indexInfo, false, true);
+		index_build(heapRelation, indexRelation, indexInfo, false, true,
+					progress);
 	}
 
 	/*
@@ -1438,6 +1443,12 @@ index_create_copy(Relation heapRelation, bool concurrently,
 		stattargets[i].isnull = isnull;
 	}
 
+	/*
+	 * Note: The current callers do not need INDEX_CREATE_REPORT_PROGRESS. If
+	 * 'concurrently' is true, there is no build at all. Otherwise the index
+	 * build is a sub-command of REPACK. The current infrastructure does not
+	 * allow two commands to report their progress at the same time.
+	 */
 	if (concurrently)
 		flags = INDEX_CREATE_SKIP_BUILD | INDEX_CREATE_CONCURRENT;
 
@@ -1528,7 +1539,7 @@ index_concurrently_build(Oid heapRelationId,
 	indexInfo->ii_BrokenHotChain = false;
 
 	/* Now build the index */
-	index_build(heapRel, indexRelation, indexInfo, false, true);
+	index_build(heapRel, indexRelation, indexInfo, false, true, true);
 
 	/* Roll back any GUC changes executed by index functions */
 	AtEOXact_GUC(false, save_nestlevel);
@@ -3001,6 +3012,7 @@ index_update_stats(Relation rel,
  *
  * isreindex indicates we are recreating a previously-existing index.
  * parallel indicates if parallelism may be useful.
+ * progress indicates if the backend should update its progress info.
  *
  * Note: before Postgres 8.2, the passed-in heap and index Relations
  * were automatically closed by this routine.  This is no longer the case.
@@ -3011,7 +3023,8 @@ index_build(Relation heapRelation,
 			Relation indexRelation,
 			IndexInfo *indexInfo,
 			bool isreindex,
-			bool parallel)
+			bool parallel,
+			bool progress)
 {
 	IndexBuildResult *stats;
 	Oid			save_userid;
@@ -3062,6 +3075,7 @@ index_build(Relation heapRelation,
 	RestrictSearchPath();
 
 	/* Set up initial progress report status */
+	if (progress)
 	{
 		const int	progress_index[] = {
 			PROGRESS_CREATEIDX_PHASE,
@@ -3819,7 +3833,7 @@ reindex_index(const ReindexStmt *stmt, Oid indexId,
 
 	/* Initialize the index and rebuild */
 	/* Note: we do not need to re-establish pkey setting */
-	index_build(heapRelation, iRel, indexInfo, true, true);
+	index_build(heapRelation, iRel, indexInfo, true, true, progress);
 
 	/* Re-allow use of target index */
 	ResetReindexProcessing();
diff --git a/src/backend/catalog/toasting.c b/src/backend/catalog/toasting.c
index 4aa52a4bd25..51b27a8c71c 100644
--- a/src/backend/catalog/toasting.c
+++ b/src/backend/catalog/toasting.c
@@ -332,7 +332,8 @@ create_toast_table(Relation rel, Oid toastOid, Oid toastIndexOid,
 				 BTREE_AM_OID,
 				 rel->rd_rel->reltablespace,
 				 collationIds, opclassIds, NULL, coloptions, NULL, (Datum) 0,
-				 INDEX_CREATE_IS_PRIMARY, 0, true, true, NULL);
+				 INDEX_CREATE_IS_PRIMARY | INDEX_CREATE_REPORT_PROGRESS, 0,
+				 true, true, NULL);
 
 	table_close(toast_rel, NoLock);
 
diff --git a/src/backend/commands/indexcmds.c b/src/backend/commands/indexcmds.c
index 4a2d21915b1..25e8c1945c5 100644
--- a/src/backend/commands/indexcmds.c
+++ b/src/backend/commands/indexcmds.c
@@ -1233,6 +1233,7 @@ DefineIndex(ParseState *pstate,
 		flags |= INDEX_CREATE_PARTITIONED;
 	if (stmt->primary)
 		flags |= INDEX_CREATE_IS_PRIMARY;
+	flags |= INDEX_CREATE_REPORT_PROGRESS;
 
 	/*
 	 * If the table is partitioned, and recursion was declined but partitions
diff --git a/src/include/catalog/index.h b/src/include/catalog/index.h
index ed9e4c37d27..7ebe4f0bd87 100644
--- a/src/include/catalog/index.h
+++ b/src/include/catalog/index.h
@@ -71,6 +71,7 @@ extern void index_check_primary_key(Relation heapRel,
 #define	INDEX_CREATE_IF_NOT_EXISTS			(1 << 4)
 #define	INDEX_CREATE_PARTITIONED			(1 << 5)
 #define INDEX_CREATE_INVALID				(1 << 6)
+#define INDEX_CREATE_REPORT_PROGRESS		(1 << 7)
 
 extern Oid	index_create(Relation heapRelation,
 						 const char *indexRelationName,
@@ -148,7 +149,8 @@ extern void index_build(Relation heapRelation,
 						Relation indexRelation,
 						IndexInfo *indexInfo,
 						bool isreindex,
-						bool parallel);
+						bool parallel,
+						bool progress);
 
 extern void validate_index(Oid heapId, Oid indexId, Snapshot snapshot);
 
-- 
2.47.3


--qfkt2ktdpcfeypib
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v48-0006-Error-out-any-process-that-would-block-at-REPACK.patch"



^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread

* [PATCH v1 1/1] remove switch statement in vector8_shift_{left,right}
@ 2026-07-02 00:30 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 279+ messages in thread

From: Nathan Bossart @ 2026-07-02 00:30 UTC (permalink / raw)

---
 src/include/port/simd.h | 29 +++--------------------------
 1 file changed, 3 insertions(+), 26 deletions(-)

diff --git a/src/include/port/simd.h b/src/include/port/simd.h
index 50615aec7f4..25a26c81cce 100644
--- a/src/include/port/simd.h
+++ b/src/include/port/simd.h
@@ -548,10 +548,6 @@ vector8_pack_16(const Vector8 v1, const Vector8 v2)
 
 /*
  * Unsigned shift left of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -560,24 +556,13 @@ vector8_shift_left(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_slli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshlq_n_u32((Vector32) v1, 4);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
 
 /*
  * Unsigned shift right of each 32-bit element in the vector by "i" bits.
- *
- * XXX AArch64 requires an integer literal, so we have to list all expected
- * values of "i" from all callers in a switch statement.  If you add a new
- * caller, be sure your expected values of "i" are handled.
  */
 #ifndef USE_NO_SIMD
 static inline Vector8
@@ -586,16 +571,8 @@ vector8_shift_right(const Vector8 v1, int i)
 #ifdef USE_SSE2
 	return _mm_srli_epi32(v1, i);
 #elif defined(USE_NEON)
-	switch (i)
-	{
-		case 4:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 4);
-		case 8:
-			return (Vector8) vshrq_n_u32((Vector32) v1, 8);
-		default:
-			Assert(false);
-			return vector8_broadcast(0);
-	}
+	/* negative shift count means right shift */
+	return (Vector8) vshlq_u32((Vector32) v1, vdupq_n_s32(-i));
 #endif
 }
 #endif							/* ! USE_NO_SIMD */
-- 
2.50.1 (Apple Git-155)


--9YipY07vKHAnXga/--





^ permalink  raw  reply  [nested|flat] 279+ messages in thread