diff options
Diffstat (limited to 'arch/powerpc/atomic_arch.h')
-rw-r--r-- | arch/powerpc/atomic_arch.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/atomic_arch.h b/arch/powerpc/atomic_arch.h new file mode 100644 index 00000000..f014e3b8 --- /dev/null +++ b/arch/powerpc/atomic_arch.h @@ -0,0 +1,15 @@ +#define a_cas a_cas +static inline int a_cas(volatile int *p, int t, int s) +{ + __asm__("\n" + " sync\n" + "1: lwarx %0, 0, %4\n" + " cmpw %0, %2\n" + " bne 1f\n" + " stwcx. %3, 0, %4\n" + " bne- 1b\n" + " isync\n" + "1: \n" + : "=&r"(t), "+m"(*p) : "r"(t), "r"(s), "r"(p) : "cc", "memory" ); + return t; +} |