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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 /ChangeLog | |
| parent | 794950ed1d29853158d783d57f72260f5665afe5 (diff) | |
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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 'ChangeLog')
| -rw-r--r-- | ChangeLog | 14 |
1 files changed, 13 insertions, 1 deletions
@@ -1,4 +1,16 @@ -2015-12-18 Torvald Riegel <triegel@redhat.com> +2015-12-19 Andrew Senkevich <andrew.senkevich@intel.com> + + * 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 feature. + * sysdeps/x86/cpu-features.c (init_cpu_features): Set the + Prefer_No_VZEROUPPER for Knights Landing. + +015-12-18 Torvald Riegel <triegel@redhat.com> * math/atest-exp2.c (mp_exp_m1): Remove. |