Re: add AVX2 support to simd.h

Tom Lane <tgl@sss.pgh.pa.us>

From: Tom Lane <tgl@sss.pgh.pa.us>

To: Nathan Bossart <nathandbossart@gmail.com>

Cc: John Naylor <johncnaylorls@gmail.com>, Ants Aasma <ants@cybertec.at>, pgsql-hackers@postgresql.org

Date: 2024-03-27T21:10:13Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Improve style of pg_lfind32().
- 7188a7806d20 17.0 landed
Fix compiler warning for pg_lfind32().
- 1f42337be535 17.0 landed
Micro-optimize pg_lfind32().
- 7644a7340c8a 17.0 landed
Introduce helper SIMD functions for small byte arrays
- 9f225e992bed 17.0 cited
Optimize xid/subxid searches in XidInMVCCSnapshot().
- 37a6e5df3713 16.0 cited

Nathan Bossart <nathandbossart@gmail.com> writes:
> Here's what I had in mind.  My usual benchmark seems to indicate that this
> shouldn't impact performance.

Shouldn't "i" be declared uint32, since nelem is?

BTW, I wonder why these functions don't declare their array
arguments like "const uint32 *base".

LGTM otherwise, and I like the fact that the #if structure
gets a lot less messy.

			regards, tom lane