diff options
Diffstat (limited to 'linuxthreads/sysdeps/powerpc/pt-machine.h')
| -rw-r--r-- | linuxthreads/sysdeps/powerpc/pt-machine.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/linuxthreads/sysdeps/powerpc/pt-machine.h b/linuxthreads/sysdeps/powerpc/pt-machine.h index c4af484e1b..39defcd00f 100644 --- a/linuxthreads/sysdeps/powerpc/pt-machine.h +++ b/linuxthreads/sysdeps/powerpc/pt-machine.h @@ -28,7 +28,7 @@ /* For multiprocessor systems, we want to ensure all memory accesses are completed before we reset a lock. On other systems, we still need to make sure that the compiler has flushed everything to memory. */ -#define MEMORY_BARRIER() __asm__ ("sync" : : : "memory") +#define MEMORY_BARRIER() __asm__ __volatile__ ("sync" : : : "memory") /* Get some notion of the current stack. Need not be exactly the top of the stack, just something somewhere in the current frame. */ @@ -36,9 +36,11 @@ register char * stack_pointer __asm__ ("r1"); /* Compare-and-swap for semaphores. */ -/* note that test-and-set(x) is the same as compare-and-swap(x, 0, 1) */ +/* note that test-and-set(x) is the same as !compare-and-swap(x, 0, 1) */ #define HAS_COMPARE_AND_SWAP +#define IMPLEMENT_TAS_WITH_CAS + #if BROKEN_PPC_ASM_CR0 static #else @@ -50,7 +52,7 @@ __compare_and_swap (long int *p, long int oldval, long int newval) int ret; MEMORY_BARRIER (); - __asm__ ( + __asm__ __volatile__ ( "0: lwarx %0,0,%1 ;" " xor. %0,%3,%0;" " bne 1f;" |