1#define a_ll a_ll
 2static inline int a_ll(volatile int *p)
 3{
 4	int v;
 5	__asm__ __volatile__ ("lwarx %0, 0, %2" : "=r"(v) : "m"(*p), "r"(p));
 6	return v;
 7}
 8
 9#define a_sc a_sc
10static inline int a_sc(volatile int *p, int v)
11{
12	int r;
13	__asm__ __volatile__ (
14		"stwcx. %2, 0, %3 ; mfcr %0"
15		: "=r"(r), "=m"(*p) : "r"(v), "r"(p) : "memory", "cc");
16	return r & 0x20000000; /* "bit 2" of "cr0" (backwards bit order) */
17}
18
19#define a_ll_p a_ll_p
20static inline void *a_ll_p(volatile void *p)
21{
22	void *v;
23	__asm__ __volatile__ ("ldarx %0, 0, %2" : "=r"(v) : "m"(*(void *volatile *)p), "r"(p));
24	return v;
25}
26
27#define a_sc_p a_sc_p
28static inline int a_sc_p(volatile void *p, void *v)
29{
30	int r;
31	__asm__ __volatile__ (
32		"stdcx. %2, 0, %3 ; mfcr %0"
33		: "=r"(r), "=m"(*(void *volatile *)p) : "r"(v), "r"(p) : "memory", "cc");
34	return r & 0x20000000; /* "bit 2" of "cr0" (backwards bit order) */
35}
36
37#define a_barrier a_barrier
38static inline void a_barrier()
39{
40	__asm__ __volatile__ ("sync" : : : "memory");
41}
42
43#define a_pre_llsc a_barrier
44
45#define a_post_llsc a_post_llsc
46static inline void a_post_llsc()
47{
48	__asm__ __volatile__ ("isync" : : : "memory");
49}
50
51#define a_crash a_crash
52static inline void a_crash()
53{
54	__asm__ __volatile__ (".long 0");
55}
56
57#define a_clz_64 a_clz_64
58static inline int a_clz_64(uint64_t x)
59{
60	__asm__ ("cntlzd %0, %1" : "=r"(x) : "r"(x));
61	return x;
62}