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 ; jnz 1f ; bsf %2,%0 ; addl $32,%0\n1:"
10 : "=r"(r) : "r"((unsigned)x), "r"((unsigned)(x>>32)) );
14 static inline int a_ctz_l(unsigned long x)
17 __asm__( "bsf %1,%0" : "=r"(r) : "r"(x) );
21 static inline void a_and_64(volatile uint64_t *p, uint64_t v)
23 __asm__( "lock ; andl %1, (%0) ; lock ; andl %2, 4(%0)"
24 : : "r"((long *)p), "r"((unsigned)v), "r"((unsigned)(v>>32)) : "memory" );
27 static inline void a_or_64(volatile uint64_t *p, uint64_t v)
29 __asm__( "lock ; orl %1, (%0) ; lock ; orl %2, 4(%0)"
30 : : "r"((long *)p), "r"((unsigned)v), "r"((unsigned)(v>>32)) : "memory" );
33 static inline void a_store_l(volatile void *p, long x)
35 __asm__( "movl %1, %0" : "=m"(*(long *)p) : "r"(x) : "memory" );
38 static inline void a_or_l(volatile void *p, long v)
40 __asm__( "lock ; orl %1, %0"
41 : "=m"(*(long *)p) : "r"(v) : "memory" );
44 static inline void *a_cas_p(volatile void *p, void *t, void *s)
46 __asm__( "lock ; cmpxchg %3, %1"
47 : "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
51 static inline long a_cas_l(volatile void *p, long t, long s)
53 __asm__( "lock ; cmpxchg %3, %1"
54 : "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
58 static inline int a_cas(volatile int *p, int t, int s)
60 __asm__( "lock ; cmpxchg %3, %1"
61 : "=a"(t), "=m"(*p) : "a"(t), "r"(s) : "memory" );
65 static inline void *a_swap_p(void *volatile *x, void *v)
67 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*(void **)x) : "0"(v) : "memory" );
70 static inline long a_swap_l(volatile void *x, long v)
72 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*(long *)x) : "0"(v) : "memory" );
76 static inline void a_or(volatile void *p, int v)
78 __asm__( "lock ; orl %1, %0"
79 : "=m"(*(int *)p) : "r"(v) : "memory" );
82 static inline void a_and(volatile void *p, int v)
84 __asm__( "lock ; andl %1, %0"
85 : "=m"(*(int *)p) : "r"(v) : "memory" );
88 static inline int a_swap(volatile int *x, int v)
90 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
96 static inline int a_fetch_add(volatile int *x, int v)
98 __asm__( "lock ; xadd %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
102 static inline void a_inc(volatile int *x)
104 __asm__( "lock ; incl %0" : "=m"(*x) : "m"(*x) : "memory" );
107 static inline void a_dec(volatile int *x)
109 __asm__( "lock ; decl %0" : "=m"(*x) : "m"(*x) : "memory" );
112 static inline void a_store(volatile int *p, int x)
114 __asm__( "movl %1, %0" : "=m"(*p) : "r"(x) : "memory" );
117 static inline void a_spin()
119 __asm__ __volatile__( "pause" : : : "memory" );
122 static inline void a_crash()
124 __asm__ __volatile__( "hlt" : : : "memory" );