mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-03 04:01:43 +08:00
75 lines
2.2 KiB
ArmAsm
75 lines
2.2 KiB
ArmAsm
/* Multiple versions of memset
|
|
Copyright (C) 2010 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, 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. */
|
|
#ifndef NOT_IN_libc
|
|
ENTRY(memset)
|
|
.type memset, @gnu_indirect_function
|
|
cmpl $0, __cpu_features+KIND_OFFSET(%rip)
|
|
jne 1f
|
|
call __init_cpu_features
|
|
1: leaq __memset_x86_64(%rip), %rax
|
|
testl $bit_Prefer_SSE_for_memop, __cpu_features+FEATURE_OFFSET+index_Prefer_SSE_for_memop(%rip)
|
|
jz 2f
|
|
leaq __memset_sse2(%rip), %rax
|
|
2: ret
|
|
END(memset)
|
|
|
|
# define USE_SSE2 1
|
|
|
|
# undef ENTRY
|
|
# define ENTRY(name) \
|
|
.type __memset_sse2, @function; \
|
|
.globl __memset_sse2; \
|
|
.p2align 4; \
|
|
__memset_sse2: cfi_startproc; \
|
|
CALL_MCOUNT
|
|
# undef END
|
|
# define END(name) \
|
|
cfi_endproc; .size __memset_sse2, .-__memset_sse2
|
|
|
|
# undef ENTRY_CHK
|
|
# define ENTRY_CHK(name) \
|
|
.type __memset_chk_sse2, @function; \
|
|
.globl __memset_chk_sse2; \
|
|
.p2align 4; \
|
|
__memset_chk_sse2: cfi_startproc; \
|
|
CALL_MCOUNT
|
|
# undef END_CHK
|
|
# define END_CHK(name) \
|
|
cfi_endproc; .size __memset_chk_sse2, .-__memset_chk_sse2
|
|
|
|
# ifdef SHARED
|
|
# undef libc_hidden_builtin_def
|
|
/* It doesn't make sense to send libc-internal memset calls through a PLT.
|
|
The speedup we get from using GPR instruction is likely eaten away
|
|
by the indirect call in the PLT. */
|
|
# define libc_hidden_builtin_def(name) \
|
|
.globl __GI_memset; __GI_memset = __memset_sse2
|
|
# endif
|
|
|
|
# undef strong_alias
|
|
# define strong_alias(original, alias)
|
|
#endif
|
|
|
|
#include "../memset.S"
|