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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-19 22:22:29 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-19 22:22:29 -0400 |
| commit | 855d156018a701b3613eb4b14ab3bd09fd12f0a3 (patch) | |
| tree | ca43c7fc79f55509f9de920fee1af242ce7bab98 /sysdeps/x86_64 | |
| parent | d9a4d2ab278ab50637e383b6174e9ec42db84327 (diff) | |
| download | glibc-855d156018a701b3613eb4b14ab3bd09fd12f0a3.tar.gz glibc-855d156018a701b3613eb4b14ab3bd09fd12f0a3.tar.xz glibc-855d156018a701b3613eb4b14ab3bd09fd12f0a3.zip | |
Optimize x86-64 rawmemchr and add test
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/multiarch/rawmemchr.S | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/sysdeps/x86_64/multiarch/rawmemchr.S b/sysdeps/x86_64/multiarch/rawmemchr.S index a8933fb55a..1f5bbe6d3f 100644 --- a/sysdeps/x86_64/multiarch/rawmemchr.S +++ b/sysdeps/x86_64/multiarch/rawmemchr.S @@ -43,19 +43,18 @@ strong_alias (rawmemchr, __rawmemchr) .section .text.sse4.2,"ax",@progbits - .align 16 + .align 16 .type __rawmemchr_sse42, @function __rawmemchr_sse42: cfi_startproc CALL_MCOUNT movd %esi, %xmm1 movq %rdi, %rcx - punpcklbw %xmm1, %xmm1 + pxor %xmm2, %xmm2 andq $~15, %rdi - punpcklbw %xmm1, %xmm1 orl $0xffffffff, %esi + pshufb %xmm2, %xmm1 movdqa (%rdi), %xmm0 - pshufd $0, %xmm1, %xmm1 subq %rdi, %rcx pcmpeqb %xmm1, %xmm0 shl %cl, %esi |