mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-24 19:51:11 +00:00
72276d6e88
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.
47 lines
1.8 KiB
C
47 lines
1.8 KiB
C
/* Multiple versions of __memmove_chk.
|
|
All versions must be listed in ifunc-impl-list.c.
|
|
Copyright (C) 2010-2016 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <string.h>
|
|
#include "init-arch.h"
|
|
|
|
#define MEMMOVE_CHK __memmove_chk_sse2
|
|
|
|
extern __typeof (__memmove_chk) __memmove_chk_sse2 attribute_hidden;
|
|
extern __typeof (__memmove_chk) __memmove_chk_ssse3 attribute_hidden;
|
|
extern __typeof (__memmove_chk) __memmove_chk_ssse3_back attribute_hidden;
|
|
extern __typeof (__memmove_chk) __memmove_chk_avx_unaligned attribute_hidden;
|
|
# ifdef HAVE_AVX512_ASM_SUPPORT
|
|
extern __typeof (__memmove_chk) __memmove_chk_avx512_no_vzeroupper attribute_hidden;
|
|
# endif
|
|
|
|
#include "debug/memmove_chk.c"
|
|
|
|
libc_ifunc (__memmove_chk,
|
|
#ifdef HAVE_AVX512_ASM_SUPPORT
|
|
HAS_ARCH_FEATURE (AVX512F_Usable)
|
|
&& HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
|
|
? __memmove_chk_avx512_no_vzeroupper
|
|
:
|
|
#endif
|
|
HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load) ? __memmove_chk_avx_unaligned :
|
|
(HAS_CPU_FEATURE (SSSE3)
|
|
? (HAS_ARCH_FEATURE (Fast_Copy_Backward)
|
|
? __memmove_chk_ssse3_back : __memmove_chk_ssse3)
|
|
: __memmove_chk_sse2));
|