1 #ifndef _INTERNAL_ATOMIC_H
2 #define _INTERNAL_ATOMIC_H
6 static inline int a_ctz_l(unsigned long x)
8 static const char debruijn32[32] = {
9 0, 1, 23, 2, 29, 24, 19, 3, 30, 27, 25, 11, 20, 8, 4, 13,
10 31, 22, 28, 18, 26, 10, 7, 12, 21, 17, 9, 6, 16, 5, 15, 14
12 return debruijn32[(x&-x)*0x076be629 >> 27];
15 static inline int a_ctz_64(uint64_t x)
20 return 32 + a_ctz_l(y);
25 int __sh_cas(volatile int *, int, int);
26 int __sh_swap(volatile int *, int);
27 int __sh_fetch_add(volatile int *, int);
28 void __sh_store(volatile int *, int);
29 void __sh_and(volatile int *, int);
30 void __sh_or(volatile int *, int);
32 #define a_cas(p,t,s) __sh_cas(p,t,s)
33 #define a_swap(x,v) __sh_swap(x,v)
34 #define a_fetch_add(x,v) __sh_fetch_add(x, v)
35 #define a_store(x,v) __sh_store(x, v)
36 #define a_and(x,v) __sh_and(x, v)
37 #define a_or(x,v) __sh_or(x, v)
39 static inline void *a_cas_p(volatile void *p, void *t, void *s)
41 return (void *)a_cas(p, (int)t, (int)s);
44 static inline void a_inc(volatile int *x)
49 static inline void a_dec(volatile int *x)
54 #define a_spin a_barrier
56 static inline void a_barrier()
58 a_cas(&(int){0}, 0, 0);
61 static inline void a_crash()
63 *(volatile char *)0=0;
66 static inline void a_or_l(volatile void *p, long v)
71 static inline void a_and_64(volatile uint64_t *p, uint64_t v)
73 union { uint64_t v; uint32_t r[2]; } u = { v };
74 a_and((int *)p, u.r[0]);
75 a_and((int *)p+1, u.r[1]);
78 static inline void a_or_64(volatile uint64_t *p, uint64_t v)
80 union { uint64_t v; uint32_t r[2]; } u = { v };
81 a_or((int *)p, u.r[0]);
82 a_or((int *)p+1, u.r[1]);