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* sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S: Shave
	off 3 more bytes by using offset-less instructions when possible.
This commit is contained in:
Ulrich Drepper
2003-02-23 07:20:34 +00:00
parent 249062b0c2
commit b1b8e747d4
2 changed files with 16 additions and 1 deletions
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3
nptl/ChangeLog
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@@ -1,5 +1,8 @@
2003-02-22 Ulrich Drepper <drepper@redhat.com> 2003-02-22 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S: Shave
off 3 more bytes by using offset-less instructions when possible.
* Makefile: Add dependency for $(objpfx)version.d. * Makefile: Add dependency for $(objpfx)version.d.
* eintr.c (eintr_source): Add unnecessary return but the compiler * eintr.c (eintr_source): Add unnecessary return but the compiler

14
nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S
View File

@@ -1,4 +1,4 @@
/* Copyright (C) 2002 Free Software Foundation, Inc. /* Copyright (C) 2002, 2003 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.
@@ -59,7 +59,11 @@ pthread_barrier_wait:
je 3f je 3f
/* There are more threads to come. */ /* There are more threads to come. */
#if CURR_EVENT == 0
movl (%ebx), %edx
#else
movl CURR_EVENT(%ebx), %edx movl CURR_EVENT(%ebx), %edx
#endif
/* Release the mutex. */ /* Release the mutex. */
LOCK LOCK
@@ -75,7 +79,11 @@ pthread_barrier_wait:
/* Don't return on spurious wakeups. The syscall does not change /* Don't return on spurious wakeups. The syscall does not change
any register except %eax so there is no need to reload any of any register except %eax so there is no need to reload any of
them. */ them. */
#if CURR_EVENT == 0
cmpl %edx, (%ebx)
#else
cmpl %edx, CURR_EVENT(%ebx) cmpl %edx, CURR_EVENT(%ebx)
#endif
je,pn 8b je,pn 8b
/* Note: %esi is still zero. */ /* Note: %esi is still zero. */
@@ -88,7 +96,11 @@ pthread_barrier_wait:
/* The necessary number of threads arrived. */ /* The necessary number of threads arrived. */
3: movl INIT_COUNT(%ebx), %eax 3: movl INIT_COUNT(%ebx), %eax
movl %eax, LEFT(%ebx) movl %eax, LEFT(%ebx)
#if CURR_EVENT == 0
incl (%ebx)
#else
incl CURR_EVENT(%ebx) incl CURR_EVENT(%ebx)
#endif
/* Wake up all waiters. The count is a signed number in the kernel /* Wake up all waiters. The count is a signed number in the kernel
so 0x7fffffff is the highest value. */ so 0x7fffffff is the highest value. */