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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2021-04-19 17:48:10 -0400 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-04-19 15:08:04 -0700 |
| commit | f53790272ce7bdc5ecd14b45f65d0464d2a61a3a (patch) | |
| tree | 080054bf654d57c524271f86b8195d602d881ae4 /sysdeps/x86_64/multiarch/ifunc-memset.h | |
| parent | 83c5b368226c34a2f0a5287df40fc290b2b34359 (diff) | |
| download | glibc-f53790272ce7bdc5ecd14b45f65d0464d2a61a3a.tar.gz glibc-f53790272ce7bdc5ecd14b45f65d0464d2a61a3a.tar.xz glibc-f53790272ce7bdc5ecd14b45f65d0464d2a61a3a.zip | |
x86: Optimize less_vec evex and avx512 memset-vec-unaligned-erms.S
No bug. This commit adds optimized cased for less_vec memset case that uses the avx512vl/avx512bw mask store avoiding the excessive branches. test-memset and test-wmemset are passing. Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
Diffstat (limited to 'sysdeps/x86_64/multiarch/ifunc-memset.h')
| -rw-r--r-- | sysdeps/x86_64/multiarch/ifunc-memset.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sysdeps/x86_64/multiarch/ifunc-memset.h b/sysdeps/x86_64/multiarch/ifunc-memset.h index 502f946a84..eda5640541 100644 --- a/sysdeps/x86_64/multiarch/ifunc-memset.h +++ b/sysdeps/x86_64/multiarch/ifunc-memset.h @@ -54,7 +54,8 @@ IFUNC_SELECTOR (void) && !CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_AVX512)) { if (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL) - && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)) + && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW) + && CPU_FEATURE_USABLE_P (cpu_features, BMI2)) { if (CPU_FEATURE_USABLE_P (cpu_features, ERMS)) return OPTIMIZE (avx512_unaligned_erms); @@ -68,7 +69,8 @@ IFUNC_SELECTOR (void) if (CPU_FEATURE_USABLE_P (cpu_features, AVX2)) { if (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL) - && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)) + && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW) + && CPU_FEATURE_USABLE_P (cpu_features, BMI2)) { if (CPU_FEATURE_USABLE_P (cpu_features, ERMS)) return OPTIMIZE (evex_unaligned_erms); |