diff options
Diffstat (limited to 'nptl/sysdeps/i386/i686/pthread_spin_trylock.S')
| -rw-r--r-- | nptl/sysdeps/i386/i686/pthread_spin_trylock.S | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/nptl/sysdeps/i386/i686/pthread_spin_trylock.S b/nptl/sysdeps/i386/i686/pthread_spin_trylock.S index 881976c4fe..2ab83e6969 100644 --- a/nptl/sysdeps/i386/i686/pthread_spin_trylock.S +++ b/nptl/sysdeps/i386/i686/pthread_spin_trylock.S @@ -19,6 +19,13 @@ #define EBUSY 16 + +#ifdef UP +# define LOCK +#else +# define LOCK lock +#endif + .globl pthread_spin_trylock .type pthread_spin_trylock,@function .align 16 @@ -26,9 +33,10 @@ pthread_spin_trylock: movl 4(%esp), %edx movl $1, %eax xorl %ecx, %ecx + LOCK cmpxchgl %ecx, (%edx) - movl $EBUSY, %ecx - movl $0, %eax - cmovne %ecx, %eax + movl $EBUSY, %edx + movl %ecx, %eax + cmovne %edx, %eax ret .size pthread_spin_trylock,.-pthread_spin_trylock |