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/* Multiple versions of strlen
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2009-2017 Free Software Foundation, Inc.
Contributed by Intel Corporation.
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 libc and for the
DSO. In static binaries, we need strlen before the initialization
happened. */
#if defined SHARED && IS_IN (libc)
.text
ENTRY(strlen)
.type strlen, @gnu_indirect_function
LOAD_GOT_AND_RTLD_GLOBAL_RO
LOAD_FUNC_GOT_EAX (__strlen_ia32)
HAS_CPU_FEATURE (SSE2)
jz 2f
LOAD_FUNC_GOT_EAX (__strlen_sse2_bsf)
HAS_ARCH_FEATURE (Slow_BSF)
jz 2f
LOAD_FUNC_GOT_EAX (__strlen_sse2)
2: ret
END(strlen)
# undef ENTRY
# define ENTRY(name) \
.type __strlen_ia32, @function; \
.globl __strlen_ia32; \
.p2align 4; \
__strlen_ia32: cfi_startproc; \
CALL_MCOUNT
# undef END
# define END(name) \
cfi_endproc; .size __strlen_ia32, .-__strlen_ia32
# undef libc_hidden_builtin_def
/* IFUNC doesn't work with the hidden functions in shared library since
they will be called without setting up EBX needed for PLT which is
used by IFUNC. */
# define libc_hidden_builtin_def(name) \
.globl __GI_strlen; __GI_strlen = __strlen_ia32
#endif
#include "../../i586/strlen.S"
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