about summary refs log tree commit diff
path: root/signal
diff options
context:
space:
mode:
authorAndrew Senkevich <andrew.senkevich@intel.com>2015-12-19 02:47:28 +0300
committerAndrew Senkevich <andrew.senkevich@intel.com>2015-12-19 02:47:28 +0300
commit83d776f979342f923b5c3d2a5b43afab841c6086 (patch)
tree180682939f88351b00817f2092e24817ddbdf07f /signal
parent794950ed1d29853158d783d57f72260f5665afe5 (diff)
downloadglibc-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')
0 files changed, 0 insertions, 0 deletions