Horton

Re: [PATCH] CRC32C optimizations using SVE2 on ARM.

John Naylor <johncnaylorls@gmail.com>

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From: John Naylor <johncnaylorls@gmail.com>
To: "Devanga.Susmitha@fujitsu.com" <Devanga.Susmitha@fujitsu.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>, "Ragesh.Hajela@fujitsu.com" <Ragesh.Hajela@fujitsu.com>, "Chiranmoy.Bhattacharya@fujitsu.com" <Chiranmoy.Bhattacharya@fujitsu.com>
Date: 2025-12-19T02:57:21Z
Lists: pgsql-hackers 
On Fri, Dec 19, 2025 at 4:20 AM Devanga.Susmitha@fujitsu.com
<Devanga.Susmitha@fujitsu.com> wrote:
> For architecture-specific functions, we use pg_attribute_target("arch=armv9-a+sve2-aes")

There was already a proposal to use armv8-a+crypto, which is more
widely available and works on smaller inputs. Perhaps you'd be
interested in reviewing and testing?

https://www.postgresql.org/message-id/CANWCAZaKhE%2BRD5KKouUFoxx1EbUNrNhcduM1VQ%3DDkSDadNEFng%40mail.gmail.com

> to ensure precise compilation control without modifying global CFLAGS, enabling a clean integration within PostgreSQL’s build system.

I think the reason we continue to use CFLAGS here was that clang
support for target attributes on Arm is fairly recent. It's probably
too soon to reconsider that.

-- 
John Naylor
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