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}