mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 11:20:07 +00:00
6fb8cbcb58
This patch includes optimized 64bit memcpy/memmove for Atom, Core 2 and Core i7. It improves memcpy by up to 3X on Atom, up to 4X on Core 2 and up to 1X on Core i7. It also improves memmove by up to 3X on Atom, up to 4X on Core 2 and up to 2X on Core i7.
48 lines
1.6 KiB
ArmAsm
48 lines
1.6 KiB
ArmAsm
/* Multiple versions of __mempcpy_chk
|
|
Copyright (C) 2010 Free Software Foundation, Inc.
|
|
Contributed by Intel Corporation.
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <sysdep.h>
|
|
#include <init-arch.h>
|
|
|
|
/* Define multiple versions only for the definition in lib and for
|
|
DSO. There are no multiarch mempcpy functions for static binaries.
|
|
*/
|
|
#ifndef NOT_IN_libc
|
|
# ifdef SHARED
|
|
.text
|
|
ENTRY(__mempcpy_chk)
|
|
.type __mempcpy_chk, @gnu_indirect_function
|
|
cmpl $0, KIND_OFFSET+__cpu_features(%rip)
|
|
jne 1f
|
|
call __init_cpu_features
|
|
1: leaq __mempcpy_chk_sse2(%rip), %rax
|
|
testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
|
|
jz 2f
|
|
leaq __mempcpy_chk_ssse3(%rip), %rax
|
|
testl $bit_Fast_Copy_Backward, __cpu_features+FEATURE_OFFSET+index_Fast_Copy_Backward(%rip)
|
|
jz 2f
|
|
leaq __mempcpy_chk_ssse3_back(%rip), %rax
|
|
2: ret
|
|
END(__mempcpy_chk)
|
|
# else
|
|
# include "../mempcpy_chk.S"
|
|
# endif
|
|
#endif
|