From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: pgsql-hackers@lists.postgresql.org, Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Andrew Gierth <andrew@tao11.riddles.org.uk>
Cc: David Rowley <david.rowley@2ndquadrant.com>
Cc: Thomas Munro <thomas.munro@enterprisedb.com>
Subject: Re: Using POPCNT and other advanced bit manipulation instructions
Date: Wed, 13 Feb 2019 14:49:28 -0500
Message-ID: <15756.1550087368@sss.pgh.pa.us> (raw)
In-Reply-To: <2F6CDF3B-08B9-4A15-ABDF-55D7F82AB76E@anarazel.de>
References: <20190213191829.GA19406@alvherre.pgsql>
<7193.1550086814@sss.pgh.pa.us>
<2F6CDF3B-08B9-4A15-ABDF-55D7F82AB76E@anarazel.de>
Andres Freund <andres@anarazel.de> writes:
> I'd assume that breaking bit counting would cause distinct enough damage (compile time or crashes). That's not to say that reverting ryu shouldn't be considered (although I'm not that bothered by cross version, ia64 and cygwin failures, especially because the latter two might be hard to come by outside the bf).
The pink doesn't appear to be limited to non-mainstream platforms,
see eg lapwing, fulmar. However, I see Andrew just pushed some fixes,
so this argument is moot pending how much that helps.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, andres@anarazel.de, alvherre@2ndquadrant.com, andrew@tao11.riddles.org.uk, david.rowley@2ndquadrant.com, thomas.munro@enterprisedb.com
Subject: Re: Using POPCNT and other advanced bit manipulation instructions
In-Reply-To: <15756.1550087368@sss.pgh.pa.us>
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