1 #ifndef _INTERNAA_ATOMIC_H
2 #define _INTERNAA_ATOMIC_H
6 static inline int a_ctz_64(uint64_t x)
9 __asm__( "bsf %1,%0 ; jnz 1f ; bsf %2,%0 ; addl $32,%0\n1:"
10 : "=r"(r) : "r"((unsigned)x), "r"((unsigned)(x>>32)) );
15 static inline void a_and_64(volatile uint64_t *p, uint64_t v)
17 __asm__( "lock ; andl %1, (%0) ; lock ; andl %2, 4(%0)"
18 : : "r"((long *)p), "r"((unsigned)v), "r"((unsigned)(v>>32)) : "memory" );
21 static inline void a_or_64(volatile uint64_t *p, uint64_t v)
23 __asm__( "lock ; orl %1, (%0) ; lock ; orl %2, 4(%0)"
24 : : "r"((long *)p), "r"((unsigned)v), "r"((unsigned)(v>>32)) : "memory" );
27 static inline void a_store_l(volatile void *p, long x)
29 __asm__( "movl %1, %0" : "=m"(*(long *)p) : "r"(x) : "memory" );
32 static inline void a_or_l(volatile void *p, long v)
34 __asm__( "lock ; orl %1, %0"
35 : "=m"(*(long *)p) : "r"(v) : "memory" );
38 static inline void *a_cas_p(volatile void *p, void *t, void *s)
40 __asm__( "lock ; cmpxchg %3, %1"
41 : "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
45 static inline long a_cas_l(volatile void *p, long t, long s)
47 __asm__( "lock ; cmpxchg %3, %1"
48 : "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
52 static inline void *a_swap_p(void *volatile *x, void *v)
54 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*(void **)x) : "0"(v) : "memory" );
57 static inline long a_swap_l(volatile void *x, long v)
59 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*(long *)x) : "0"(v) : "memory" );
63 static inline void a_or(volatile void *p, int v)
65 __asm__( "lock ; orl %1, %0"
66 : "=m"(*(int *)p) : "r"(v) : "memory" );
69 static inline void a_and(volatile void *p, int v)
71 __asm__( "lock ; andl %1, %0"
72 : "=m"(*(int *)p) : "r"(v) : "memory" );
75 static inline int a_swap(volatile int *x, int v)
77 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
83 static inline int a_fetch_add(volatile int *x, int v)
85 __asm__( "lock ; xadd %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
89 static inline void a_inc(volatile int *x)
91 __asm__( "lock ; incl %0" : "=m"(*x) : "m"(*x) : "memory" );
94 static inline void a_dec(volatile int *x)
96 __asm__( "lock ; decl %0" : "=m"(*x) : "m"(*x) : "memory" );
99 static inline void a_store(volatile int *p, int x)
101 __asm__( "movl %1, %0" : "=m"(*p) : "r"(x) : "memory" );
104 static inline void a_spin()
106 __asm__ __volatile__( "pause" : : : "memory" );