static inline int a_cas(volatile int *p, int t, int s)
{
- __asm__("1: lwarx %0, 0, %1\n"
+ __asm__("\n"
+ " sync\n"
+ "1: lwarx %0, 0, %4\n"
" cmpw %0, %2\n"
" bne 1f\n"
- " stwcx. %3, 0, %1\n"
+ " stwcx. %3, 0, %4\n"
" bne- 1b\n"
+ " isync\n"
"1: \n"
- : "=&r"(t) : "r"(p), "r"(t), "r"(s) : "cc", "memory" );
+ : "=&r"(t), "+m"(*p) : "r"(t), "r"(s), "r"(p) : "cc", "memory" );
return t;
}
return (void *)a_cas(p, (int)t, (int)s);
}
-static inline long a_cas_l(volatile void *p, long t, long s)
-{
- return a_cas(p, t, s);
-}
-
-
static inline int a_swap(volatile int *x, int v)
{
int old;
static inline void a_store(volatile int *p, int x)
{
- *p=x;
+ __asm__ __volatile__ ("\n"
+ " sync\n"
+ " stw %1, %0\n"
+ " isync\n"
+ : "=m"(*p) : "r"(x) : "memory" );
}
-static inline void a_spin()
+#define a_spin a_barrier
+
+static inline void a_barrier()
{
+ a_cas(&(int){0}, 0, 0);
}
static inline void a_crash()