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/* Multiple versions of memcmp.
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 memcmp so that the compiler won't complain about the type
mismatch with the IFUNC selector in strong_alias, below. */
# undef memcmp
# define memcmp __redirect_memcmp
# include <string.h>
# undef memcmp
# include <init-arch.h>
extern __typeof (__redirect_memcmp) __memcmp_i386 attribute_hidden;
extern __typeof (__redirect_memcmp) __memcmp_i686 attribute_hidden;
extern __typeof (__redirect_memcmp) __memcmp_ssse3 attribute_hidden;
extern __typeof (__redirect_memcmp) __memcmp_sse4_2 attribute_hidden;
/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
ifunc symbol properly. */
extern __typeof (__redirect_memcmp) memcmp;
extern void *memcmp_ifunc (void) __asm__ ("memcmp");
void *
memcmp_ifunc (void)
{
if (HAS_CPU_FEATURE (SSE4_2))
return __memcmp_sse4_2;
else if (HAS_CPU_FEATURE (SSSE3))
return __memcmp_ssse3;
if (USE_I686)
return __memcmp_i686;
else
return __memcmp_i386;
}
__asm__ (".type memcmp, %gnu_indirect_function");
weak_alias (memcmp, bcmp)
#endif
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