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| author | H.J. Lu <hongjiu.lu@intel.com> | 2011-06-24 14:15:32 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-06-24 14:15:32 -0400 |
| commit | 0b1cbaaef5ccc21baf2c35d4698fb28e82eab385 (patch) | |
| tree | c1f6ad8a49ef79510355c765ad3e385067e7ade0 /sysdeps/x86_64 | |
| parent | 07f494a027b3adea1f3cd0cd4ca7c10949cdc476 (diff) | |
| download | glibc-0b1cbaaef5ccc21baf2c35d4698fb28e82eab385.tar glibc-0b1cbaaef5ccc21baf2c35d4698fb28e82eab385.tar.gz glibc-0b1cbaaef5ccc21baf2c35d4698fb28e82eab385.tar.bz2 glibc-0b1cbaaef5ccc21baf2c35d4698fb28e82eab385.zip | |
Optimized st{r,p}{,n}cpy for SSE2/SSSE3 on x86-32
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/multiarch/init-arch.c | 11 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/init-arch.h | 6 |
2 files changed, 14 insertions, 3 deletions
diff --git a/sysdeps/x86_64/multiarch/init-arch.c b/sysdeps/x86_64/multiarch/init-arch.c index 809d105c77..81b2378467 100644 --- a/sysdeps/x86_64/multiarch/init-arch.c +++ b/sysdeps/x86_64/multiarch/init-arch.c @@ -97,13 +97,18 @@ __init_cpu_features (void) case 0x2c: case 0x2e: case 0x2f: - /* Rep string instructions and copy backward are fast on - Intel Core i3, i5 and i7. */ + /* Rep string instructions, copy backward and unaligned loads + are fast on Intel Core i3, i5 and i7. */ #if index_Fast_Rep_String != index_Fast_Copy_Backward # error index_Fast_Rep_String != index_Fast_Copy_Backward #endif +#if index_Fast_Rep_String != index_Fast_Unaligned_Load +# error index_Fast_Rep_String != index_Fast_Unaligned_Load +#endif __cpu_features.feature[index_Fast_Rep_String] - |= bit_Fast_Rep_String | bit_Fast_Copy_Backward; + |= (bit_Fast_Rep_String + | bit_Fast_Copy_Backward + | bit_Fast_Unaligned_Load); break; } } diff --git a/sysdeps/x86_64/multiarch/init-arch.h b/sysdeps/x86_64/multiarch/init-arch.h index 6e409b8f17..addf5f3dde 100644 --- a/sysdeps/x86_64/multiarch/init-arch.h +++ b/sysdeps/x86_64/multiarch/init-arch.h @@ -20,6 +20,7 @@ #define bit_Fast_Copy_Backward (1 << 1) #define bit_Slow_BSF (1 << 2) #define bit_Prefer_SSE_for_memop (1 << 3) +#define bit_Fast_Unaligned_Load (1 << 4) #ifdef __ASSEMBLER__ @@ -39,6 +40,7 @@ # define index_Fast_Copy_Backward FEATURE_INDEX_1*FEATURE_SIZE # define index_Slow_BSF FEATURE_INDEX_1*FEATURE_SIZE # define index_Prefer_SSE_for_memop FEATURE_INDEX_1*FEATURE_SIZE +# define index_Fast_Unaligned_Load FEATURE_INDEX_1*FEATURE_SIZE #else /* __ASSEMBLER__ */ @@ -112,6 +114,7 @@ extern const struct cpu_features *__get_cpu_features (void) # define index_Fast_Copy_Backward FEATURE_INDEX_1 # define index_Slow_BSF FEATURE_INDEX_1 # define index_Prefer_SSE_for_memop FEATURE_INDEX_1 +# define index_Fast_Unaligned_Load FEATURE_INDEX_1 #define HAS_ARCH_FEATURE(idx, bit) \ ((__get_cpu_features ()->feature[idx] & (bit)) != 0) @@ -128,4 +131,7 @@ extern const struct cpu_features *__get_cpu_features (void) #define HAS_PREFER_SSE_FOR_MEMOP \ HAS_ARCH_FEATURE (index_Prefer_SSE_for_memop, bit_Prefer_SSE_for_memop) +#define HAS_FAST_UNALIGNED_LOAD \ + HAS_ARCH_FEATURE (index_Fast_Unaligned_Load, bit_Fast_Unaligned_Load) + #endif /* __ASSEMBLER__ */ |