1 #ifndef _INTERNAL_ATOMIC_H
2 #define _INTERNAL_ATOMIC_H
6 static inline int a_ctz_64(uint64_t x)
9 __asm__( "bsf %1,%0" : "=r"(r) : "r"(x) );
13 static inline int a_ctz_l(unsigned long x)
16 __asm__( "bsf %1,%0" : "=r"(r) : "r"(x) );
20 static inline void a_and_64(volatile uint64_t *p, uint64_t v)
22 __asm__( "lock ; andq %1, %0"
23 : "=m"(*(long *)p) : "r"(v) : "memory" );
26 static inline void a_or_64(volatile uint64_t *p, uint64_t v)
28 __asm__( "lock ; orq %1, %0"
29 : "=m"(*(long *)p) : "r"(v) : "memory" );
32 static inline void a_store_l(volatile void *p, long x)
34 __asm__( "movq %1, %0" : "=m"(*(long *)p) : "r"(x) : "memory" );
37 static inline void a_or_l(volatile void *p, long v)
39 __asm__( "lock ; orq %1, %0"
40 : "=m"(*(long *)p) : "r"(v) : "memory" );
43 static inline void *a_cas_p(volatile void *p, void *t, void *s)
45 __asm__( "lock ; cmpxchg %3, %1"
46 : "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
50 static inline long a_cas_l(volatile void *p, long t, long s)
52 __asm__( "lock ; cmpxchg %3, %1"
53 : "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
57 static inline int a_cas(volatile int *p, int t, int s)
59 __asm__( "lock ; cmpxchgl %3, %1"
60 : "=a"(t), "=m"(*p) : "a"(t), "r"(s) : "memory" );
64 static inline void *a_swap_p(void *volatile *x, void *v)
66 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*(void **)x) : "0"(v) : "memory" );
69 static inline long a_swap_l(volatile void *x, long v)
71 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*(long *)x) : "0"(v) : "memory" );
75 static inline void a_or(volatile void *p, int v)
77 __asm__( "lock ; orl %1, %0"
78 : "=m"(*(int *)p) : "r"(v) : "memory" );
81 static inline void a_and(volatile void *p, int v)
83 __asm__( "lock ; andl %1, %0"
84 : "=m"(*(int *)p) : "r"(v) : "memory" );
87 static inline int a_swap(volatile int *x, int v)
89 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
95 static inline int a_fetch_add(volatile int *x, int v)
97 __asm__( "lock ; xadd %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
101 static inline void a_inc(volatile int *x)
103 __asm__( "lock ; incl %0" : "=m"(*x) : "m"(*x) : "memory" );
106 static inline void a_dec(volatile int *x)
108 __asm__( "lock ; decl %0" : "=m"(*x) : "m"(*x) : "memory" );
111 static inline void a_store(volatile int *p, int x)
113 __asm__( "movl %1, %0" : "=m"(*p) : "r"(x) : "memory" );
116 static inline void a_spin()
118 __asm__ __volatile__( "pause" : : : "memory" );
121 static inline void a_crash()
123 __asm__ __volatile__( "hlt" : : : "memory" );