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author | Andrew Senkevich <andrew.senkevich@intel.com> | 2015-12-19 02:47:28 +0300 |
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committer | Andrew Senkevich <andrew.senkevich@intel.com> | 2015-12-19 02:47:28 +0300 |
commit | 83d776f979342f923b5c3d2a5b43afab841c6086 (patch) | |
tree | 180682939f88351b00817f2092e24817ddbdf07f /signal | |
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 'signal')
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