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| author | Andrew Senkevich <andrew.senkevich@intel.com> | 2015-12-19 02:47:28 +0300 |
|---|---|---|
| committer | Andrew Senkevich <andrew.senkevich@intel.com> | 2015-12-19 02:47:28 +0300 |
| commit | 83d776f979342f923b5c3d2a5b43afab841c6086 (patch) | |
| tree | 180682939f88351b00817f2092e24817ddbdf07f /sysdeps/x86_64/multiarch/Makefile | |
| parent | 794950ed1d29853158d783d57f72260f5665afe5 (diff) | |
| download | glibc-83d776f979342f923b5c3d2a5b43afab841c6086.tar.gz glibc-83d776f979342f923b5c3d2a5b43afab841c6086.tar.xz glibc-83d776f979342f923b5c3d2a5b43afab841c6086.zip | |
Added memset optimized with AVX512 for KNL hardware.
It shows improvement up to 28% over AVX2 memset (performance results
attached at <https://sourceware.org/ml/libc-alpha/2015-12/msg00052.html>).
* sysdeps/x86_64/multiarch/memset-avx512-no-vzeroupper.S: New file.
* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Added new file.
* sysdeps/x86_64/multiarch/ifunc-impl-list.c: Added new tests.
* sysdeps/x86_64/multiarch/memset.S: Added new IFUNC branch.
* sysdeps/x86_64/multiarch/memset_chk.S: Likewise.
* sysdeps/x86/cpu-features.h (bit_Prefer_No_VZEROUPPER,
index_Prefer_No_VZEROUPPER): New.
* sysdeps/x86/cpu-features.c (init_cpu_features): Set the
Prefer_No_VZEROUPPER for Knights Landing.
Diffstat (limited to 'sysdeps/x86_64/multiarch/Makefile')
| -rw-r--r-- | sysdeps/x86_64/multiarch/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile index bb811c2dfb..b2e31efe02 100644 --- a/sysdeps/x86_64/multiarch/Makefile +++ b/sysdeps/x86_64/multiarch/Makefile @@ -18,7 +18,8 @@ sysdep_routines += strncat-c stpncpy-c strncpy-c strcmp-ssse3 \ stpcpy-sse2-unaligned stpncpy-sse2-unaligned \ strcat-sse2-unaligned strncat-sse2-unaligned \ strchr-sse2-no-bsf memcmp-ssse3 strstr-sse2-unaligned \ - strcspn-c strpbrk-c strspn-c varshift memset-avx2 + strcspn-c strpbrk-c strspn-c varshift memset-avx2 \ + memset-avx512-no-vzeroupper CFLAGS-varshift.c += -msse4 CFLAGS-strcspn-c.c += -msse4 CFLAGS-strpbrk-c.c += -msse4 |