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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2022-04-14 11:47:38 -0500 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2022-04-14 23:21:42 -0500 |
| commit | d85916e30a902ff4bce5b0b44ff245ef58b79236 (patch) | |
| tree | 3e3bcb8cf609e49cbc3fd4de0acbffbd021f1c90 /sysdeps/x86_64/multiarch/ifunc-memmove.h | |
| parent | 41bfe224e5e2e23c8d8a0d3d45e66591373d3fd4 (diff) | |
| download | glibc-d85916e30a902ff4bce5b0b44ff245ef58b79236.tar.gz glibc-d85916e30a902ff4bce5b0b44ff245ef58b79236.tar.xz glibc-d85916e30a902ff4bce5b0b44ff245ef58b79236.zip | |
x86: Remove mem{move|cpy}-ssse3-back
With SSE2, SSE4.1, AVX2, and EVEX versions very few targets prefer SSSE3. As a result it is no longer worth it to keep the SSSE3 versions given the code size cost. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86_64/multiarch/ifunc-memmove.h')
| -rw-r--r-- | sysdeps/x86_64/multiarch/ifunc-memmove.h | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/sysdeps/x86_64/multiarch/ifunc-memmove.h b/sysdeps/x86_64/multiarch/ifunc-memmove.h index f8f958064c..fb01fbb301 100644 --- a/sysdeps/x86_64/multiarch/ifunc-memmove.h +++ b/sysdeps/x86_64/multiarch/ifunc-memmove.h @@ -25,7 +25,6 @@ extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned) extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned_erms) attribute_hidden; extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden; -extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3_back) attribute_hidden; extern __typeof (REDIRECT_NAME) OPTIMIZE (avx_unaligned) attribute_hidden; extern __typeof (REDIRECT_NAME) OPTIMIZE (avx_unaligned_erms) attribute_hidden; @@ -94,17 +93,14 @@ IFUNC_SELECTOR (void) } } - if (!CPU_FEATURE_USABLE_P (cpu_features, SSSE3) - || CPU_FEATURES_ARCH_P (cpu_features, Fast_Unaligned_Copy)) + if (CPU_FEATURE_USABLE_P (cpu_features, SSSE3) + && !CPU_FEATURES_ARCH_P (cpu_features, Fast_Unaligned_Copy)) { - if (CPU_FEATURE_USABLE_P (cpu_features, ERMS)) - return OPTIMIZE (sse2_unaligned_erms); - - return OPTIMIZE (sse2_unaligned); + return OPTIMIZE (ssse3); } - if (CPU_FEATURES_ARCH_P (cpu_features, Fast_Copy_Backward)) - return OPTIMIZE (ssse3_back); + if (CPU_FEATURE_USABLE_P (cpu_features, ERMS)) + return OPTIMIZE (sse2_unaligned_erms); - return OPTIMIZE (ssse3); + return OPTIMIZE (sse2_unaligned); } |