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Minor optimizations and cleanups of x86 cond_broadcast.

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This commit is contained in:
Ulrich Drepper 2009-11-18 06:40:25 -08:00
parent dd7106b3c6
commit dfedb126d6
3 changed files with 15 additions and 11 deletions
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5
nptl/ChangeLog
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@ -1,3 +1,8 @@
2009-11-18 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S: Minor
optimizations and cleanups.
2009-11-18 Dinakar Guniguntala <dino@in.ibm.com> 2009-11-18 Dinakar Guniguntala <dino@in.ibm.com>
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S: * sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S:

19
nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S
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@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc. /* Copyright (C) 2002,2003,2004,2006,2007,2009 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -138,13 +138,6 @@ __pthread_cond_broadcast:
cfi_restore_state cfi_restore_state
.align 16
/* Unlock. */
4: LOCK
subl $1, cond_lock-cond_futex(%ebx)
jne 5f
jmp 6b
/* Initial locking failed. */ /* Initial locking failed. */
1: 1:
#if cond_lock == 0 #if cond_lock == 0
@ -165,7 +158,13 @@ __pthread_cond_broadcast:
call __lll_lock_wait call __lll_lock_wait
jmp 2b jmp 2b
/* Unlock in loop requires waekup. */ .align 16
/* Unlock. */
4: LOCK
subl $1, cond_lock-cond_futex(%ebx)
je 6b
/* Unlock in loop requires wakeup. */
5: leal cond_lock-cond_futex(%ebx), %eax 5: leal cond_lock-cond_futex(%ebx), %eax
#if (LLL_SHARED-LLL_PRIVATE) > 255 #if (LLL_SHARED-LLL_PRIVATE) > 255
xorl %ecx, %ecx xorl %ecx, %ecx
@ -180,7 +179,7 @@ __pthread_cond_broadcast:
call __lll_unlock_wake call __lll_unlock_wake
jmp 6b jmp 6b
/* Unlock in loop requires waekup. */ /* Unlock in loop requires wakeup. */
7: leal cond_lock-cond_futex(%ebx), %eax 7: leal cond_lock-cond_futex(%ebx), %eax
#if (LLL_SHARED-LLL_PRIVATE) > 255 #if (LLL_SHARED-LLL_PRIVATE) > 255
xorl %ecx, %ecx xorl %ecx, %ecx

2
nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S
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@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc. /* Copyright (C) 2002,2003,2004,2005,2007,2009 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.