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_or_l(volatile void *p, long v)
35 __asm__( "lock ; orl %1, %0"
36 : "=m"(*(long *)p) : "r"(v) : "memory" );
39 static inline void *a_cas_p(volatile void *p, void *t, void *s)
41 __asm__( "lock ; cmpxchg %3, %1"
42 : "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
46 static inline int a_cas(volatile int *p, int t, int s)
48 __asm__( "lock ; cmpxchg %3, %1"
49 : "=a"(t), "=m"(*p) : "a"(t), "r"(s) : "memory" );
53 static inline void a_or(volatile int *p, int v)
55 __asm__( "lock ; orl %1, %0"
56 : "=m"(*p) : "r"(v) : "memory" );
59 static inline void a_and(volatile int *p, int v)
61 __asm__( "lock ; andl %1, %0"
62 : "=m"(*p) : "r"(v) : "memory" );
65 static inline int a_swap(volatile int *x, int v)
67 __asm__( "xchg %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
73 static inline int a_fetch_add(volatile int *x, int v)
75 __asm__( "lock ; xadd %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
79 static inline void a_inc(volatile int *x)
81 __asm__( "lock ; incl %0" : "=m"(*x) : "m"(*x) : "memory" );
84 static inline void a_dec(volatile int *x)
86 __asm__( "lock ; decl %0" : "=m"(*x) : "m"(*x) : "memory" );
89 static inline void a_store(volatile int *p, int x)
91 __asm__( "movl %1, %0" : "=m"(*p) : "r"(x) : "memory" );
94 static inline void a_spin()
96 __asm__ __volatile__( "pause" : : : "memory" );
99 static inline void a_barrier()
101 __asm__ __volatile__( "" : : : "memory" );
104 static inline void a_crash()
106 __asm__ __volatile__( "hlt" : : : "memory" );