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_swap a_swap
11static inline int a_swap(volatile int *p, int v)
12{
13 __asm__ __volatile__(
14 "xchg %0, %1"
15 : "=r"(v), "=m"(*p) : "0"(v) : "memory" );
16 return v;
17}
18
19#define a_fetch_add a_fetch_add
20static inline int a_fetch_add(volatile int *p, int v)
21{
22 __asm__ __volatile__(
23 "lock ; xadd %0, %1"
24 : "=r"(v), "=m"(*p) : "0"(v) : "memory" );
25 return v;
26}
27
28#define a_and a_and
29static inline void a_and(volatile int *p, int v)
30{
31 __asm__ __volatile__(
32 "lock ; and %1, %0"
33 : "=m"(*p) : "r"(v) : "memory" );
34}
35
36#define a_or a_or
37static inline void a_or(volatile int *p, int v)
38{
39 __asm__ __volatile__(
40 "lock ; or %1, %0"
41 : "=m"(*p) : "r"(v) : "memory" );
42}
43
44#define a_and_64 a_and_64
45static inline void a_and_64(volatile uint64_t *p, uint64_t v)
46{
47 __asm__ __volatile(
48 "lock ; and %1, %0"
49 : "=m"(*p) : "r"(v) : "memory" );
50}
51
52#define a_or_64 a_or_64
53static inline void a_or_64(volatile uint64_t *p, uint64_t v)
54{
55 __asm__ __volatile__(
56 "lock ; or %1, %0"
57 : "=m"(*p) : "r"(v) : "memory" );
58}
59
60#define a_inc a_inc
61static inline void a_inc(volatile int *p)
62{
63 __asm__ __volatile__(
64 "lock ; incl %0"
65 : "=m"(*p) : "m"(*p) : "memory" );
66}
67
68#define a_dec a_dec
69static inline void a_dec(volatile int *p)
70{
71 __asm__ __volatile__(
72 "lock ; decl %0"
73 : "=m"(*p) : "m"(*p) : "memory" );
74}
75
76#define a_store a_store
77static inline void a_store(volatile int *p, int x)
78{
79 __asm__ __volatile__(
80 "mov %1, %0 ; lock ; orl $0,(%%rsp)"
81 : "=m"(*p) : "r"(x) : "memory" );
82}
83
84#define a_barrier a_barrier
85static inline void a_barrier()
86{
87 __asm__ __volatile__( "" : : : "memory" );
88}
89
90#define a_spin a_spin
91static inline void a_spin()
92{
93 __asm__ __volatile__( "pause" : : : "memory" );
94}
95
96#define a_crash a_crash
97static inline void a_crash()
98{
99 __asm__ __volatile__( "hlt" : : : "memory" );
100}
101
102#define a_ctz_64 a_ctz_64
103static inline int a_ctz_64(uint64_t x)
104{
105 __asm__( "bsf %1,%0" : "=r"(x) : "r"(x) );
106 return x;
107}
108
109#define a_ctz_32 a_ctz_32
110static inline int a_ctz_32(uint32_t x)
111{
112 __asm__( "bsf %1,%0" : "=r"(x) : "r"(x) );
113 return x;
114}
115
116#define a_clz_64 a_clz_64
117static inline int a_clz_64(uint64_t x)
118{
119 __asm__( "bsr %1,%0 ; xor $63,%0" : "=r"(x) : "r"(x) );
120 return x;
121}