Re: Popcount optimization using AVX512
Devulapalli, Raghuveer <raghuveer.devulapalli@intel.com>
From: Raghuveer Devulapalli <raghuveer.devulapalli@intel.com>
To: pgsql-hackers@lists.postgresql.org
Cc: Nathan Bossart <nathandbossart@gmail.com>
Date: 2024-10-30T20:53:10Z
Lists: pgsql-hackers
Commits
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API reference →
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Fix __attribute__((target(...))) usage.
- 41b98ddb77bf 18.0 landed
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Use __attribute__((target(...))) for AVX-512 support.
- f78667bd910e 18.0 landed
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Fix code for probing availability of AVX-512.
- 598e0114a3b1 17.0 landed
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Optimize visibilitymap_count() with AVX-512 instructions.
- 41c51f0c68b2 17.0 landed
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Optimize pg_popcount() with AVX-512 instructions.
- 792752af4eb5 17.0 landed
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Inline pg_popcount() for small buffers.
- deb1486c7d36 17.0 landed
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Avoid function call overhead of pg_popcount() in syslogger.c.
- 4133c1f45c54 17.0 landed
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Refactor code for setting pg_popcount* function pointers.
- 6687430c98f3 17.0 landed
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Inline pg_popcount{32,64} into pg_popcount().
- cc4826dd5e52 17.0 landed
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Remove MSVC scripts
- 1301c80b2167 17.0 cited
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Use ARMv8 CRC instructions where available.
- f044d71e331d 11.0 cited
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Use Intel SSE 4.2 CRC instructions where available.
- 3dc2d62d0486 9.5.0 cited
BTW, I just realized function attributes for xsave and avx512 don't work on MSVC (see https://developercommunity.visualstudio.com/t/support-function-target-attribute-and-mutiversioning/10130630). Not sure if you care about it. Its an easy fix (see https://gcc.godbolt.org/z/Pebdj3vMx).