Re: Popcount optimization using AVX512

On Sat, 6 Apr 2024 at 04:38, Nathan Bossart <nathandbossart@gmail.com> wrote:
> This seems to provide a small performance boost, so I've incorporated it
> into v27.

Won't Valgrind complain about this?

+pg_popcount_avx512(const char *buf, int bytes)

+ buf = (const char *) TYPEALIGN_DOWN(sizeof(__m512i), buf);

+ val = _mm512_maskz_loadu_epi8(mask, (const __m512i *) buf);

David