diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S | 21 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S | 21 |
2 files changed, 21 insertions, 21 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S index c5ec154af2..600ba75874 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -50,26 +50,25 @@ __lll_mutex_lock_wait: xorl %esi, %esi /* No timeout. */ xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */ -1: cmpl %edx, %eax /* NB: %edx == 2 */ - je 3f + cmpl %edx, %eax /* NB: %edx == 2 */ + je 1f - movl $1, %eax - LOCK - cmpxchgl %edx, (%ebx) + movl %edx, %eax + xchgl %eax, (%ebx) /* NB: lock is implied */ testl %eax, %eax je 2f -3: movl $SYS_futex, %eax +1: movl $SYS_futex, %eax ENTER_KERNEL - xorl %eax, %eax -2: LOCK - cmpxchgl %edx, (%ebx) + movl %edx, %eax + xchgl %eax, (%ebx) /* NB: lock is implied */ + testl %eax, %eax jnz,pn 1b - popl %esi +2: popl %esi popl %ebx popl %edx ret diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S index a56c714aeb..3c56daecf5 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -50,24 +50,25 @@ __lll_mutex_lock_wait: movl $2, %edx movq %r10, %rsi /* movq $FUTEX_WAIT, %rsi */ -1: - movl $1, %eax - LOCK - cmpxchgl %edx, (%rdi) + cmpl %edx, %eax /* NB: %edx == 2 */ + je 1f + + movl %edx, %eax + xchgl %eax, (%rdi) /* NB: lock is implied */ testl %eax, %eax je 2f - movq $SYS_futex, %rax +1: movq $SYS_futex, %rax syscall - xorl %eax, %eax -2: LOCK - cmpxchgl %edx, (%rdi) + movl %edx, %eax + xchgl %eax, (%rdi) /* NB: lock is implied */ + testl %eax, %eax jnz 1b - popq %rdx +2: popq %rdx popq %r10 retq .size __lll_mutex_lock_wait,.-__lll_mutex_lock_wait |