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* sysdeps/unix/sysv/linux/x86_64/sem_trywait.S (sem_trywait): Tiny

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optimization.
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Ulrich Drepper 2007-05-26 21:47:28 +00:00
parent 6df7ffad19
commit a2dd3360db
2 changed files with 5 additions and 2 deletions
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3
nptl/ChangeLog
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@ -1,5 +1,8 @@
2007-05-26 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/x86_64/sem_trywait.S (sem_trywait): Tiny
optimization.
* sysdeps/unix/sysv/linux/sem_wait.c: Add missing break.
* sysdeps/unix/sysv/linux/sem_timedwait.c: Removed left-over
duplication of __sem_wait_cleanup.

4
nptl/sysdeps/unix/sysv/linux/x86_64/sem_trywait.S
View file

@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -37,7 +37,7 @@ sem_trywait:
2: testl %eax, %eax
jz 1f
leaq -1(%rax), %rdx
leal -1(%rax), %edx
LOCK
cmpxchgl %edx, (%rdi)
jne 2b