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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-06-15 08:57:39 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-06-15 08:57:52 -0700 |
| commit | 9f4254b8bd1b948c3a90e48a126236bf3e5e70a0 (patch) | |
| tree | 2ae35f450d620168037021810d2ec57230ae609b /sysdeps/x86_64/multiarch | |
| parent | 9ed0aa15d316fb30e056d3a2e8f3361460c67e78 (diff) | |
| download | glibc-9f4254b8bd1b948c3a90e48a126236bf3e5e70a0.tar.gz glibc-9f4254b8bd1b948c3a90e48a126236bf3e5e70a0.tar.xz glibc-9f4254b8bd1b948c3a90e48a126236bf3e5e70a0.zip | |
x86-64: Implement wcscpy IFUNC selector in C
* sysdeps/x86_64/multiarch/wcscpy.S: Removed. * sysdeps/x86_64/multiarch/wcscpy.c: New file.
Diffstat (limited to 'sysdeps/x86_64/multiarch')
| -rw-r--r-- | sysdeps/x86_64/multiarch/wcscpy.c (renamed from sysdeps/x86_64/multiarch/wcscpy.S) | 38 |
1 files changed, 21 insertions, 17 deletions
diff --git a/sysdeps/x86_64/multiarch/wcscpy.S b/sysdeps/x86_64/multiarch/wcscpy.c index 9150ab6d18..01dee8054a 100644 --- a/sysdeps/x86_64/multiarch/wcscpy.S +++ b/sysdeps/x86_64/multiarch/wcscpy.c @@ -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 + +# define SYMBOL_NAME wcscpy +# include <init-arch.h> + +extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden; +extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden; + +static inline void * +IFUNC_SELECTOR (void) +{ + const struct cpu_features* cpu_features = __get_cpu_features (); - .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 + if (CPU_FEATURES_CPU_P (cpu_features, SSSE3)) + return OPTIMIZE (ssse3); -2: leaq __wcscpy_ssse3(%rip), %rax - ret + return OPTIMIZE (sse2); +} -END(wcscpy) +libc_ifunc_redirected (__redirect_wcscpy, wcscpy, IFUNC_SELECTOR ()); #endif |