1#define a_barrier a_barrier
2static inline void a_barrier()
3{
4 __asm__ __volatile__ ("fence rw,rw" : : : "memory");
5}
6
7#define a_cas a_cas
8static inline int a_cas(volatile int *p, int t, int s)
9{
10 int old, tmp;
11 __asm__ __volatile__ (
12 "\n1: lr.w.aqrl %0, (%2)\n"
13 " bne %0, %3, 1f\n"
14 " sc.w.aqrl %1, %4, (%2)\n"
15 " bnez %1, 1b\n"
16 "1:"
17 : "=&r"(old), "=&r"(tmp)
18 : "r"(p), "r"((long)t), "r"((long)s)
19 : "memory");
20 return old;
21}