Re: Optimize Arm64 crc32c implementation in Postgresql

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>
Cc: Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Andres Freund <andres(at)anarazel(dot)de>, Yuqi Gu <Yuqi(dot)Gu(at)arm(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Optimize Arm64 crc32c implementation in Postgresql
Date: 2018-05-02 22:08:09
Message-ID: 8890.1525298889@sss.pgh.pa.us
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Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> writes:
> On Thu, May 3, 2018 at 2:30 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Do you really need the pg_crc32c_armv8_choose_dummy global variable?

> True. Of course I needed an interesting length too...

I don't have any way to test this, but it looks plausible, so pushed.

(I note you forgot to run autoheader, btw.)

regards, tom lane

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