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glibc/sysdeps/x86
litenglong 00d406e77b x86: Disable AVX Fast Unaligned Load on Hygon 1/2/3
- Performance testing revealed significant memcpy performance degradation
  when bit_arch_AVX_Fast_Unaligned_Load is enabled on Hygon 3.
- Hygon confirmed AVX performance issues in certain memory functions.
- Glibc benchmarks show SSE outperforms AVX for
  memcpy/memmove/memset/strcmp/strcpy/strlen and so on.
- Hardware differences primarily in floating-point operations don't justify
  AVX usage for memory operations.

Reviewed-by: gaoxiang <gaoxiang@kylinos.cn>
Signed-off-by: litenglong <litenglong@kylinos.cn>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
2025-10-27 05:16:30 +08:00
..
2025-03-31 10:54:52 -03:00
2025-03-05 11:22:09 -03:00
2025-02-28 16:55:18 +00:00
2021-03-30 14:58:19 +05:30
2017-11-27 14:16:47 +00:00