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| author | H.J. Lu <hongjiu.lu@intel.com> | 2010-06-30 08:26:11 -0700 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2010-06-30 08:26:11 -0700 |
| commit | 6fb8cbcb58a29fff73eb2101b34caa19a7f88eba (patch) | |
| tree | 3a39ddec3a6cf66f8541c6591dbe4017136580f0 /sysdeps/x86_64/multiarch/init-arch.h | |
| parent | d85f8ff66711fd3b1c5753330499c7403fa46d81 (diff) | |
| download | glibc-6fb8cbcb58a29fff73eb2101b34caa19a7f88eba.tar.gz glibc-6fb8cbcb58a29fff73eb2101b34caa19a7f88eba.tar.xz glibc-6fb8cbcb58a29fff73eb2101b34caa19a7f88eba.zip | |
Improve 64bit memcpy/memmove for Atom, Core 2 and Core i7
This patch includes optimized 64bit memcpy/memmove for Atom, Core 2 and Core i7. It improves memcpy by up to 3X on Atom, up to 4X on Core 2 and up to 1X on Core i7. It also improves memmove by up to 3X on Atom, up to 4X on Core 2 and up to 2X on Core i7.
Diffstat (limited to 'sysdeps/x86_64/multiarch/init-arch.h')
| -rw-r--r-- | sysdeps/x86_64/multiarch/init-arch.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/sysdeps/x86_64/multiarch/init-arch.h b/sysdeps/x86_64/multiarch/init-arch.h index b2f2de3796..4a211c0864 100644 --- a/sysdeps/x86_64/multiarch/init-arch.h +++ b/sysdeps/x86_64/multiarch/init-arch.h @@ -17,6 +17,7 @@ 02111-1307 USA. */ #define bit_Fast_Rep_String (1 << 0) +#define bit_Fast_Copy_Backward (1 << 1) #ifdef __ASSEMBLER__ @@ -32,7 +33,8 @@ # define index_SSE4_1 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET # define index_SSE4_2 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET -#define index_Fast_Rep_String FEATURE_INDEX_1*FEATURE_SIZE +# define index_Fast_Rep_String FEATURE_INDEX_1*FEATURE_SIZE +# define index_Fast_Copy_Backward FEATURE_INDEX_1*FEATURE_SIZE #else /* __ASSEMBLER__ */ @@ -102,6 +104,16 @@ extern const struct cpu_features *__get_cpu_features (void) # define HAS_SSE4_2 HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 20) # define HAS_FMA HAS_CPU_FEATURE (COMMON_CPUID_INDEX_1, ecx, 12) -# define index_Fast_Rep_String FEATURE_INDEX_1 +# define index_Fast_Rep_String FEATURE_INDEX_1 +# define index_Fast_Copy_Backward FEATURE_INDEX_1 + +#define HAS_ARCH_FEATURE(idx, bit) \ + ((__get_cpu_features ()->feature[idx] & (bit)) != 0) + +#define HAS_FAST_REP_STRING \ + HAS_ARCH_FEATURE (index_Fast_Rep_String, bit_Fast_Rep_String) + +#define HAS_FAST_COPY_BACKWARD \ + HAS_ARCH_FEATURE (index_Fast_Copy_Backward, bit_Fast_Copy_Backward) #endif /* __ASSEMBLER__ */ |