1#define a_cas a_cas
  2static inline int a_cas(volatile int *p, int t, int s)
  3{
  4	__asm__ __volatile__ (
  5		"lock ; cmpxchg %3, %1"
  6		: "=a"(t), "=m"(*p) : "a"(t), "r"(s) : "memory" );
  7	return t;
  8}
  9
 10#define a_cas_p a_cas_p
 11static inline void *a_cas_p(volatile void *p, void *t, void *s)
 12{
 13	__asm__( "lock ; cmpxchg %3, %1"
 14		: "=a"(t), "=m"(*(void *volatile *)p)
 15		: "a"(t), "r"(s) : "memory" );
 16	return t;
 17}
 18
 19#define a_swap a_swap
 20static inline int a_swap(volatile int *p, int v)
 21{
 22	__asm__ __volatile__(
 23		"xchg %0, %1"
 24		: "=r"(v), "=m"(*p) : "0"(v) : "memory" );
 25	return v;
 26}
 27
 28#define a_fetch_add a_fetch_add
 29static inline int a_fetch_add(volatile int *p, int v)
 30{
 31	__asm__ __volatile__(
 32		"lock ; xadd %0, %1"
 33		: "=r"(v), "=m"(*p) : "0"(v) : "memory" );
 34	return v;
 35}
 36
 37#define a_and a_and
 38static inline void a_and(volatile int *p, int v)
 39{
 40	__asm__ __volatile__(
 41		"lock ; and %1, %0"
 42		: "=m"(*p) : "r"(v) : "memory" );
 43}
 44
 45#define a_or a_or
 46static inline void a_or(volatile int *p, int v)
 47{
 48	__asm__ __volatile__(
 49		"lock ; or %1, %0"
 50		: "=m"(*p) : "r"(v) : "memory" );
 51}
 52
 53#define a_and_64 a_and_64
 54static inline void a_and_64(volatile uint64_t *p, uint64_t v)
 55{
 56	__asm__ __volatile(
 57		"lock ; and %1, %0"
 58		 : "=m"(*p) : "r"(v) : "memory" );
 59}
 60
 61#define a_or_64 a_or_64
 62static inline void a_or_64(volatile uint64_t *p, uint64_t v)
 63{
 64	__asm__ __volatile__(
 65		"lock ; or %1, %0"
 66		 : "=m"(*p) : "r"(v) : "memory" );
 67}
 68
 69#define a_inc a_inc
 70static inline void a_inc(volatile int *p)
 71{
 72	__asm__ __volatile__(
 73		"lock ; incl %0"
 74		: "=m"(*p) : "m"(*p) : "memory" );
 75}
 76
 77#define a_dec a_dec
 78static inline void a_dec(volatile int *p)
 79{
 80	__asm__ __volatile__(
 81		"lock ; decl %0"
 82		: "=m"(*p) : "m"(*p) : "memory" );
 83}
 84
 85#define a_store a_store
 86static inline void a_store(volatile int *p, int x)
 87{
 88	__asm__ __volatile__(
 89		"mov %1, %0 ; lock ; orl $0,(%%rsp)"
 90		: "=m"(*p) : "r"(x) : "memory" );
 91}
 92
 93#define a_barrier a_barrier
 94static inline void a_barrier()
 95{
 96	__asm__ __volatile__( "" : : : "memory" );
 97}
 98
 99#define a_spin a_spin
100static inline void a_spin()
101{
102	__asm__ __volatile__( "pause" : : : "memory" );
103}
104
105#define a_crash a_crash
106static inline void a_crash()
107{
108	__asm__ __volatile__( "hlt" : : : "memory" );
109}
110
111#define a_ctz_64 a_ctz_64
112static inline int a_ctz_64(uint64_t x)
113{
114	__asm__( "bsf %1,%0" : "=r"(x) : "r"(x) );
115	return x;
116}
117
118#define a_clz_64 a_clz_64
119static inline int a_clz_64(uint64_t x)
120{
121	__asm__( "bsr %1,%0 ; xor $63,%0" : "=r"(x) : "r"(x) );
122	return x;
123}