Re: Improve CRC32C performance on SSE4.2

On Tue, Apr 1, 2025 at 11:25 PM Nathan Bossart <nathandbossart(at)gmail(dot)com> wrote:
>
> On Tue, Apr 01, 2025 at 05:33:02PM +0700, John Naylor wrote:
> > On Thu, Mar 27, 2025 at 2:55 AM Devulapalli, Raghuveer <raghuveer(dot)devulapalli(at)intel(dot)com> wrote:

> >> (2) Might be apt to rename pg_crc32c_sse42*.c to pg_crc32c_x86*.c since
> >> they contain both sse42 and avx512 versions.
> >
> > The name is now not quite accurate, but it's not exactly misleading
> > either. I'm leaning towards keeping it the same, so for now I've just
> > updated the header comment.
>
> I'm not too worried about this one either. FWIW I'm likely going to look
> into moving all the x86_64 popcount stuff into pg_popcount_avx512.c and
> renaming it to pg_popcount_x86_64.c for v19. This would parallel
> pg_popcount_aarch64.c a bit better, and a file per architecture seems like
> a logical way to neatly organize things.

Seems like a good idea.

> I read through the code a couple of times and nothing stood out to me.

Thanks for looking, I plan to commit this over the weekend unless
there are objections.

--
John Naylor
Amazon Web Services