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| author | Andrew Senkevich <andrew.senkevich@intel.com> | 2016-01-16 00:49:45 +0300 |
|---|---|---|
| committer | Andrew Senkevich <andrew.senkevich@intel.com> | 2016-01-16 00:49:45 +0300 |
| commit | 72276d6e8843db6df5971b06787f0a5e39bda138 (patch) | |
| tree | ad7ed01db58285d38559773305d5d8b16eca39d3 /sysdeps/x86_64/multiarch/memmove.c | |
| parent | b02840bacdefde318d2ad2f920e50785b9b25d69 (diff) | |
| download | glibc-72276d6e8843db6df5971b06787f0a5e39bda138.tar.gz glibc-72276d6e8843db6df5971b06787f0a5e39bda138.tar.xz glibc-72276d6e8843db6df5971b06787f0a5e39bda138.zip | |
Added memcpy/memmove family optimized with AVX512 for KNL hardware.
Added AVX512 implementations of memcpy, mempcpy, memmove, memcpy_chk,
mempcpy_chk, memmove_chk.
It shows average improvement more than 30% over AVX versions on KNL
hardware (performance results in the thread
<https://sourceware.org/ml/libc-alpha/2016-01/msg00258.html>).
* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Added new files.
* sysdeps/x86_64/multiarch/ifunc-impl-list.c: Added new tests.
* sysdeps/x86_64/multiarch/memcpy-avx512-no-vzeroupper.S: New file.
* sysdeps/x86_64/multiarch/mempcpy-avx512-no-vzeroupper.S: Likewise.
* sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S: Likewise.
* sysdeps/x86_64/multiarch/memcpy.S: Added new IFUNC branch.
* sysdeps/x86_64/multiarch/memcpy_chk.S: Likewise.
* sysdeps/x86_64/multiarch/memmove.c: Likewise.
* sysdeps/x86_64/multiarch/memmove_chk.c: Likewise.
* sysdeps/x86_64/multiarch/mempcpy.S: Likewise.
* sysdeps/x86_64/multiarch/mempcpy_chk.S: Likewise.
Diffstat (limited to 'sysdeps/x86_64/multiarch/memmove.c')
| -rw-r--r-- | sysdeps/x86_64/multiarch/memmove.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sysdeps/x86_64/multiarch/memmove.c b/sysdeps/x86_64/multiarch/memmove.c index e8445317a2..8da5640bb0 100644 --- a/sysdeps/x86_64/multiarch/memmove.c +++ b/sysdeps/x86_64/multiarch/memmove.c @@ -36,6 +36,9 @@ extern __typeof (__redirect_memmove) __memmove_sse2 attribute_hidden; extern __typeof (__redirect_memmove) __memmove_ssse3 attribute_hidden; extern __typeof (__redirect_memmove) __memmove_ssse3_back attribute_hidden; extern __typeof (__redirect_memmove) __memmove_avx_unaligned attribute_hidden; +# ifdef HAVE_AVX512_ASM_SUPPORT + extern __typeof (__redirect_memmove) __memmove_avx512_no_vzeroupper attribute_hidden; +# endif #endif @@ -49,12 +52,18 @@ extern __typeof (__redirect_memmove) __memmove_avx_unaligned attribute_hidden; ifunc symbol properly. */ extern __typeof (__redirect_memmove) __libc_memmove; libc_ifunc (__libc_memmove, - HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load) +#ifdef HAVE_AVX512_ASM_SUPPORT + HAS_ARCH_FEATURE (AVX512F_Usable) + && HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER) + ? __memmove_avx512_no_vzeroupper + : +#endif + (HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load) ? __memmove_avx_unaligned : (HAS_CPU_FEATURE (SSSE3) ? (HAS_ARCH_FEATURE (Fast_Copy_Backward) ? __memmove_ssse3_back : __memmove_ssse3) - : __memmove_sse2)); + : __memmove_sse2))); strong_alias (__libc_memmove, memmove) |