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Fix x86-64 strchr propagation of search byte into all bytes of SSE register

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Richard Li 2010-10-25 14:13:17 -04:00 committed by Ulrich Drepper
parent fdc0f374bc
commit dbf3a06904
3 changed files with 10 additions and 3 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2010-10-25 Ulrich Drepper <drepper@redhat.com>
[BZ #12159]
* sysdeps/x86_64/multiarch/strchr.S: Fix propagation of search byte
into all bytes of SSE register.
Patch by Richard Li <richardpku@gmail.com>.
2010-10-24 Ulrich Drepper <drepper@redhat.com>
[BZ #12140]

2
NEWS
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@ -11,7 +11,7 @@ Version 2.13
3268, 7066, 10851, 11611, 11640, 11701, 11840, 11856, 11883, 11903, 11904,
11968, 11979, 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108,
12113, 12140
12113, 12140, 12159
* New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark

4
sysdeps/x86_64/multiarch/strchr.S
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@ -1,5 +1,5 @@
/* strchr with SSE4.2
Copyright (C) 2009 Free Software Foundation, Inc.
Copyright (C) 2009, 2010 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -87,13 +87,13 @@ __strchr_sse42:
pxor %xmm2, %xmm2
movd %esi, %xmm1
movl %edi, %ecx
pshufb %xmm2, %xmm1
andl $15, %ecx
movq %rdi, %r8
je L(aligned_start)
/* Handle unaligned string. */
andq $-16, %r8
pshufb %xmm2, %xmm1
movdqa (%r8), %xmm0
pcmpeqb %xmm0, %xmm2
pcmpeqb %xmm1, %xmm0