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