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/* Multiple versions of memset.
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2015 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/>. */
/* Define multiple versions only for the definition in lib. */
#if IS_IN (libc)
/* Redefine memset so that the compiler won't complain about the type
mismatch with the IFUNC selector in strong_alias, below. */
# undef memset
# define memset __redirect_memset
# include <string.h>
# undef memset
# include <init-arch.h>
extern __typeof (__redirect_memset) __memset_i386 attribute_hidden;
extern __typeof (__redirect_memset) __memset_i586 attribute_hidden;
extern __typeof (__redirect_memset) __memset_i686 attribute_hidden;
extern __typeof (__redirect_memset) __memset_sse2 attribute_hidden;
extern __typeof (__redirect_memset) __memset_sse2_rep attribute_hidden;
/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
ifunc symbol properly. */
extern __typeof (__redirect_memset) __memset;
extern void *memset_ifunc (void) __asm__ ("__memset");
void *
memset_ifunc (void)
{
if (HAS_CPU_FEATURE (SSE2))
{
if (HAS_ARCH_FEATURE (Fast_Rep_String))
return __memset_sse2_rep;
else
return __memset_sse2;
}
if (USE_I686)
return __memset_i686;
else if (USE_I586)
return __memset_i586;
else
return __memset_i386;
}
__asm__ (".type __memset, %gnu_indirect_function");
strong_alias (__memset, memset)
#endif
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