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/* Multiple versions of strchr
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 libc. */
#if IS_IN (libc)
# define _HAVE_STRING_ARCH_strchr
/* Redefine strchr so that the compiler won't complain about the type
mismatch with the IFUNC selector in strong_alias, below. */
# undef strchr
# define strchr __redirect_strchr
# include <string.h>
# undef strchr
# include <init-arch.h>
extern __typeof (__redirect_strchr) __strchr_i386 attribute_hidden;
extern __typeof (__redirect_strchr) __strchr_i586 attribute_hidden;
extern __typeof (__redirect_strchr) __strchr_sse2 attribute_hidden;
extern __typeof (__redirect_strchr) __strchr_sse2_bsf attribute_hidden;
/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
ifunc symbol properly. */
extern __typeof (__redirect_strchr) strchr;
extern void *strchr_ifunc (void) __asm__ ("strchr");
void *
strchr_ifunc (void)
{
if (HAS_CPU_FEATURE (SSE2))
{
if (HAS_ARCH_FEATURE (Slow_BSF))
return __strchr_sse2;
else
return __strchr_sse2_bsf;
}
if (USE_I586)
return __strchr_i586;
else
return __strchr_i386;
}
__asm__ (".type strchr, %gnu_indirect_function");
weak_alias (strchr, index)
#endif
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