diff options
| author | Dale Rahn <drahn@cvs.openbsd.org> | 2002-11-12 18:56:29 +0000 |
|---|---|---|
| committer | Dale Rahn <drahn@cvs.openbsd.org> | 2002-11-12 18:56:29 +0000 |
| commit | 6a2b2974d6d0469840b37a9109b8e5f45cf05170 (patch) | |
| tree | ef09c3f33e6f664cf18e4b276b22c915c9040c59 /lib/libc_r | |
| parent | 5310b67125a2c4c3936791cfd77dbe37cf314856 (diff) | |
Fix the C version of atomic lock so that the compiler will not share
registers. ok marc@
Diffstat (limited to 'lib/libc_r')
| -rw-r--r-- | lib/libc_r/arch/powerpc/_atomic_lock.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/libc_r/arch/powerpc/_atomic_lock.c b/lib/libc_r/arch/powerpc/_atomic_lock.c index 0d6099bbfed..d248b4725cf 100644 --- a/lib/libc_r/arch/powerpc/_atomic_lock.c +++ b/lib/libc_r/arch/powerpc/_atomic_lock.c @@ -1,4 +1,4 @@ -/* $OpenBSD: _atomic_lock.c,v 1.4 2002/10/11 19:08:41 marc Exp $ */ +/* $OpenBSD: _atomic_lock.c,v 1.5 2002/11/12 18:56:28 drahn Exp $ */ /* * Atomic lock for powerpc */ @@ -10,11 +10,12 @@ _atomic_lock(volatile _spinlock_lock_t *lock) { _spinlock_lock_t old; - __asm__("1: lwarx %0,0,%1 \n" + __asm__("1: lwarx 0,0,%1 \n" " stwcx. %2,0,%1 \n" " bne- 1b \n" + " mr %0, 0 \n" : "=r" (old), "=r" (lock) - : "r" (_SPINLOCK_LOCKED), "1" (lock) + : "r" (_SPINLOCK_LOCKED), "1" (lock) : "0" ); return (old != _SPINLOCK_UNLOCKED); |