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| author | H.J. Lu <hjl.tools@gmail.com> | 2014-07-14 07:58:27 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2014-07-14 07:58:27 -0700 |
| commit | f2fef657d8736c32fb600771949f59852558b11a (patch) | |
| tree | a9e954223fa5cbd9e53f143e0f50c6f6276ebe0c /sysdeps/x86_64/multiarch/memset.S | |
| parent | f6c44d475104e931bab2b4ffa499961088de673c (diff) | |
| download | glibc-f2fef657d8736c32fb600771949f59852558b11a.tar.gz glibc-f2fef657d8736c32fb600771949f59852558b11a.tar.xz glibc-f2fef657d8736c32fb600771949f59852558b11a.zip | |
Enable AVX2 optimized memset only if -mavx2 works
* config.h.in (HAVE_AVX2_SUPPORT): New #undef. * sysdeps/i386/configure.ac: Set HAVE_AVX2_SUPPORT and config-cflags-avx2. * sysdeps/x86_64/configure.ac: Likewise. * sysdeps/i386/configure: Regenerated. * sysdeps/x86_64/configure: Likewise. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add memset-avx2 only if config-cflags-avx2 is yes. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Tests for memset_chk and memset only if HAVE_AVX2_SUPPORT is defined. * sysdeps/x86_64/multiarch/memset.S: Define multiple versions only if HAVE_AVX2_SUPPORT is defined. * sysdeps/x86_64/multiarch/memset_chk.S: Likewise.
Diffstat (limited to 'sysdeps/x86_64/multiarch/memset.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/memset.S | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/sysdeps/x86_64/multiarch/memset.S b/sysdeps/x86_64/multiarch/memset.S index 3113d1cbc0..00d46d12d0 100644 --- a/sysdeps/x86_64/multiarch/memset.S +++ b/sysdeps/x86_64/multiarch/memset.S @@ -17,12 +17,13 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#ifdef HAVE_AVX2_SUPPORT #include <sysdep.h> #include <shlib-compat.h> #include <init-arch.h> /* Define multiple versions only for the definition in lib. */ -#ifndef NOT_IN_libc +# ifndef NOT_IN_libc ENTRY(memset) .type memset, @gnu_indirect_function cmpl $0, __cpu_features+KIND_OFFSET(%rip) @@ -34,26 +35,27 @@ ENTRY(memset) leaq __memset_avx2(%rip), %rax 2: ret END(memset) -#endif +# endif -#if !defined NOT_IN_libc -# undef memset -# define memset __memset_sse2 +# if !defined NOT_IN_libc +# undef memset +# define memset __memset_sse2 -# undef __memset_chk -# define __memset_chk __memset_chk_sse2 +# undef __memset_chk +# define __memset_chk __memset_chk_sse2 -# ifdef SHARED +# ifdef SHARED # undef libc_hidden_builtin_def /* It doesn't make sense to send libc-internal memset calls through a PLT. The speedup we get from using GPR instruction is likely eaten away by the indirect call in the PLT. */ # define libc_hidden_builtin_def(name) \ .globl __GI_memset; __GI_memset = __memset_sse2 -# endif +# endif -# undef strong_alias -# define strong_alias(original, alias) +# undef strong_alias +# define strong_alias(original, alias) +# endif #endif #include "../memset.S" |