diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S index fdd2958130..672f2cac0e 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S @@ -38,10 +38,11 @@ .align 16 pthread_barrier_wait: /* Get the mutex. */ - orl $-1, %esi + xorl %eax, %eax + movl $1, %esi LOCK - xaddl %esi, MUTEX(%rdi) - jne 1f + cmpxchgl %esi, MUTEX(%rdi) + jnz 1f /* One less waiter. If this was the last one needed wake everybody. */ @@ -57,8 +58,8 @@ pthread_barrier_wait: /* Release the mutex. */ LOCK - addl $1, MUTEX(%rdi) - jng 6f + decl MUTEX(%rdi) + jne 6f /* Wait for the remaining threads. The call will return immediately if the CURR_EVENT memory has meanwhile been changed. */ @@ -102,25 +103,25 @@ pthread_barrier_wait: waking the waiting threads since otherwise a new thread might arrive and gets waken up, too. */ LOCK - addl $1, MUTEX(%rdi) - jng 4f + decl MUTEX(%rdi) + jne 4f 5: orl $-1, %eax /* == PTHREAD_BARRIER_SERIAL_THREAD */ retq 1: addq $MUTEX, %rdi - callq __lll_lock_wait + callq __lll_mutex_lock_wait subq $MUTEX, %rdi jmp 2b 4: addq $MUTEX, %rdi - callq __lll_unlock_wake + callq __lll_mutex_unlock_wake subq $MUTEX, %rdi jmp 5b 6: addq $MUTEX, %rdi - callq __lll_unlock_wake + callq __lll_mutex_unlock_wake subq $MUTEX, %rdi jmp 7b .size pthread_barrier_wait,.-pthread_barrier_wait |