1 #define a_barrier a_barrier
a_barrier()2 static inline void a_barrier()
3 {
4 __asm__ __volatile__ ("fence rw,rw" : : : "memory");
5 }
6
7 #define a_cas a_cas
a_cas(volatile int * p,int t,int s)8 static inline int a_cas(volatile int *p, int t, int s)
9 {
10 int old, tmp;
11 __asm__("\n1: lr.w.aqrl %0, %2\n"
12 " bne %0, %3, 1f\n"
13 " sc.w.aqrl %1, %4, %2\n"
14 " bnez %1, 1b\n"
15 "1:"
16 : "=&r"(old), "+r"(tmp), "+A"(*p)
17 : "r"(t), "r"(s));
18 return old;
19 }
20
21 #define a_cas_p a_cas_p
a_cas_p(volatile void * p,void * t,void * s)22 static inline void *a_cas_p(volatile void *p, void *t, void *s)
23 {
24 void *old;
25 int tmp;
26 __asm__("\n1: lr.d.aqrl %0, %2\n"
27 " bne %0, %3, 1f\n"
28 " sc.d.aqrl %1, %4, %2\n"
29 " bnez %1, 1b\n"
30 "1:"
31 : "=&r"(old), "+r"(tmp), "+A"(*(long *)p)
32 : "r"(t), "r"(s));
33 return old;
34 }
35