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| author | Liubov Dmitrieva <liubov.dmitrieva@gmail.com> | 2011-10-07 11:49:10 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-07 11:49:10 -0400 |
| commit | 093ecf92998de275820296058ad5648e354b9e0d (patch) | |
| tree | 5f1fabcf8d97f0ff7da005cdeed3532761b895d1 /sysdeps/x86_64/multiarch | |
| parent | fde56e5cc5011d8c0de39290af0e76d884d07624 (diff) | |
| download | glibc-093ecf92998de275820296058ad5648e354b9e0d.tar.gz glibc-093ecf92998de275820296058ad5648e354b9e0d.tar.xz glibc-093ecf92998de275820296058ad5648e354b9e0d.zip | |
Improve 64 bit memchr, memrchr, rawmemchr with SSE2
Diffstat (limited to 'sysdeps/x86_64/multiarch')
| -rw-r--r-- | sysdeps/x86_64/multiarch/rawmemchr.S | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/sysdeps/x86_64/multiarch/rawmemchr.S b/sysdeps/x86_64/multiarch/rawmemchr.S index 2a8a6909ef..a8933fb55a 100644 --- a/sysdeps/x86_64/multiarch/rawmemchr.S +++ b/sysdeps/x86_64/multiarch/rawmemchr.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2009 Free Software Foundation, Inc. +/* Copyright (C) 2009, 2011 Free Software Foundation, Inc. Contributed by Ulrich Drepper <drepper@redhat.com>. This file is part of the GNU C Library. @@ -29,11 +29,15 @@ ENTRY(rawmemchr) cmpl $0, __cpu_features+KIND_OFFSET(%rip) jne 1f call __init_cpu_features -1: leaq __rawmemchr_sse2(%rip), %rax +1: testl $bit_Prefer_PMINUB_for_stringop, __cpu_features+FEATURE_OFFSET+index_Prefer_PMINUB_for_stringop(%rip) + jnz 2f testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip) jz 2f leaq __rawmemchr_sse42(%rip), %rax -2: ret + ret +2: leaq __rawmemchr_sse2(%rip), %rax + ret + END(rawmemchr) strong_alias (rawmemchr, __rawmemchr) |