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x86-64: Implement wcscpy IFUNC selector in C

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* sysdeps/x86_64/multiarch/wcscpy.S: Removed.
	* sysdeps/x86_64/multiarch/wcscpy.c: New file.
This commit is contained in:
H.J. Lu 2017-06-15 08:57:39 -07:00
parent 9ed0aa15d3
commit 9f4254b8bd
2 changed files with 26 additions and 17 deletions
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ChangeLog
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@ -1,3 +1,8 @@
2017-06-15 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86_64/multiarch/wcscpy.S: Removed.
* sysdeps/x86_64/multiarch/wcscpy.c: New file.
2017-06-15 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add

38
sysdeps/x86_64/multiarch/wcscpy.S → sysdeps/x86_64/multiarch/wcscpy.c
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@ -1,7 +1,6 @@
/* Multiple versions of wcscpy
/* Multiple versions of wcscpy.
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2011-2017 Free Software Foundation, Inc.
Contributed by Intel Corporation.
Copyright (C) 2017 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
@ -18,23 +17,28 @@
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. */
#if IS_IN (libc)
# define wcscpy __redirect_wcscpy
# include <wchar.h>
# undef wcscpy
.text
ENTRY(wcscpy)
.type wcscpy, @gnu_indirect_function
LOAD_RTLD_GLOBAL_RO_RDX
HAS_CPU_FEATURE (SSSE3)
jnz 2f
leaq __wcscpy_sse2(%rip), %rax
ret
# define SYMBOL_NAME wcscpy
# include <init-arch.h>
2: leaq __wcscpy_ssse3(%rip), %rax
ret
extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden;
END(wcscpy)
static inline void *
IFUNC_SELECTOR (void)
{
const struct cpu_features* cpu_features = __get_cpu_features ();
if (CPU_FEATURES_CPU_P (cpu_features, SSSE3))
return OPTIMIZE (ssse3);
return OPTIMIZE (sse2);
}
libc_ifunc_redirected (__redirect_wcscpy, wcscpy, IFUNC_SELECTOR ());
#endif