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 #define LLSC_CLOBBERS "r0", "t", "memory"
26 #define LLSC_START(mem) "synco\n" \
27 "0: movli.l @" mem ", r0\n"
28 #define LLSC_END(mem) \
29 "1: movco.l r0, @" mem "\n" \
33 static inline int __sh_cas_llsc(volatile int *p, int t, int s)
43 : "=&r"(old) : "r"(p), "r"(t), "r"(s) : LLSC_CLOBBERS);
47 static inline int __sh_swap_llsc(volatile int *x, int v)
55 : "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
59 static inline int __sh_fetch_add_llsc(volatile int *x, int v)
67 : "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
71 static inline void __sh_store_llsc(volatile int *p, int x)
77 : : "r"(p), "r"(x) : "memory");
80 static inline void __sh_and_llsc(volatile int *x, int v)
86 : : "r"(x), "r"(v) : LLSC_CLOBBERS);
89 static inline void __sh_or_llsc(volatile int *x, int v)
95 : : "r"(x), "r"(v) : LLSC_CLOBBERS);
99 #define a_cas(p,t,s) __sh_cas_llsc(p,t,s)
100 #define a_swap(x,v) __sh_swap_llsc(x,v)
101 #define a_fetch_add(x,v) __sh_fetch_add_llsc(x, v)
102 #define a_store(x,v) __sh_store_llsc(x, v)
103 #define a_and(x,v) __sh_and_llsc(x, v)
104 #define a_or(x,v) __sh_or_llsc(x, v)
107 int __sh_cas(volatile int *, int, int);
108 int __sh_swap(volatile int *, int);
109 int __sh_fetch_add(volatile int *, int);
110 void __sh_store(volatile int *, int);
111 void __sh_and(volatile int *, int);
112 void __sh_or(volatile int *, int);
114 #define a_cas(p,t,s) __sh_cas(p,t,s)
115 #define a_swap(x,v) __sh_swap(x,v)
116 #define a_fetch_add(x,v) __sh_fetch_add(x, v)
117 #define a_store(x,v) __sh_store(x, v)
118 #define a_and(x,v) __sh_and(x, v)
119 #define a_or(x,v) __sh_or(x, v)
122 static inline void *a_cas_p(volatile void *p, void *t, void *s)
124 return (void *)a_cas(p, (int)t, (int)s);
127 static inline void a_inc(volatile int *x)
132 static inline void a_dec(volatile int *x)
137 #define a_spin a_barrier
139 static inline void a_barrier()
141 a_cas(&(int){0}, 0, 0);
144 static inline void a_crash()
146 *(volatile char *)0=0;
149 static inline void a_or_l(volatile void *p, long v)
154 static inline void a_and_64(volatile uint64_t *p, uint64_t v)
156 union { uint64_t v; uint32_t r[2]; } u = { v };
157 a_and((int *)p, u.r[0]);
158 a_and((int *)p+1, u.r[1]);
161 static inline void a_or_64(volatile uint64_t *p, uint64_t v)
163 union { uint64_t v; uint32_t r[2]; } u = { v };
164 a_or((int *)p, u.r[0]);
165 a_or((int *)p+1, u.r[1]);