(pthread_barrier_wait): Don't save, load, and restore %esi for last thread.

[kopensolaris-gnu/glibc.git] / nptl / sysdeps / unix / sysv / linux / i386 / i486 / pthread_cond_signal.S

diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S
index a581c12..807d2f5 100644 (file)
--- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S
+++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S
@@ -40,10 +40,9 @@
        .align  16
 __pthread_cond_signal:
 
-       pushl   %esi
        pushl   %ebx
 
-       movl    12(%esp), %ebx
+       movl    8(%esp), %ebx
 
        /* Get internal lock.  */
        movl    $1, %eax
@@ -56,22 +55,21 @@ __pthread_cond_signal:
        testl   %eax, %eax
        jne     1f
 
-2:     movl    total_seq+4(%ebx), %eax
-       movl    total_seq(%ebx), %ecx
-       cmpl    wakeup_seq+4(%ebx), %eax
+2:     addl    $wakeup_seq, %ebx
+       movl    total_seq+4-wakeup_seq(%ebx), %eax
+       movl    total_seq-wakeup_seq(%ebx), %ecx
+       cmpl    4(%ebx), %eax
        ja      3f
        jb      4f
-       cmpl    wakeup_seq(%ebx), %ecx
+       cmpl    (%ebx), %ecx
        jbe     4f
 
        /* Bump the wakeup number.  */
-3:     addl    $1, wakeup_seq(%ebx)
-       adcl    $0, wakeup_seq+4(%ebx)
+3:     addl    $1, (%ebx)
+       adcl    $0, 4(%ebx)
 
        /* Wake up one thread.  */
-       addl    $wakeup_seq, %ebx
        movl    $FUTEX_WAKE, %ecx
-       xorl    %esi, %esi
        movl    $SYS_futex, %eax
        movl    %ecx, %edx      /* movl $1, %edx */
        ENTER_KERNEL
@@ -83,7 +81,6 @@ __pthread_cond_signal:
 
 6:     xorl    %eax, %eax
        popl    %ebx
-       popl    %esi
        ret
 
        /* Initial locking failed.  */