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/* 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, see
<http://www.gnu.org/licenses/>. */
#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"
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