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}