1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Note: some of these functions are semantically inlined
// by the compiler (in src/cmd/compile/internal/gc/ssa.go).
#include "textflag.h"
TEXT ·Loaduintptr(SB), NOSPLIT, $0-16
JMP ·Load64(SB)
TEXT ·Loaduint(SB), NOSPLIT, $0-16
JMP ·Load64(SB)
TEXT ·Loadint32(SB), NOSPLIT, $0-12
JMP ·Load(SB)
TEXT ·Loadint64(SB), NOSPLIT, $0-16
JMP ·Load64(SB)
// bool Cas(int32 *val, int32 old, int32 new)
// Atomically:
// if(*val == old){
// *val = new;
// return 1;
// } else
// return 0;
TEXT ·Cas(SB),NOSPLIT,$0-17
MOVQ ptr+0(FP), BX
MOVL old+8(FP), AX
MOVL new+12(FP), CX
LOCK
CMPXCHGL CX, 0(BX)
SETEQ ret+16(FP)
RET
// bool ·Cas64(uint64 *val, uint64 old, uint64 new)
// Atomically:
// if(*val == old){
// *val = new;
// return 1;
// } else {
// return 0;
// }
TEXT ·Cas64(SB), NOSPLIT, $0-25
MOVQ ptr+0(FP), BX
MOVQ old+8(FP), AX
MOVQ new+16(FP), CX
LOCK
CMPXCHGQ CX, 0(BX)
SETEQ ret+24(FP)
RET
// bool Casp1(void **val, void *old, void *new)
// Atomically:
// if(*val == old){
// *val = new;
// return 1;
// } else
// return 0;
TEXT ·Casp1(SB), NOSPLIT, $0-25
MOVQ ptr+0(FP), BX
MOVQ old+8(FP), AX
MOVQ new+16(FP), CX
LOCK
CMPXCHGQ CX, 0(BX)
SETEQ ret+24(FP)
RET
TEXT ·Casint32(SB), NOSPLIT, $0-17
JMP ·Cas(SB)
TEXT ·Casint64(SB), NOSPLIT, $0-25
JMP ·Cas64(SB)
TEXT ·Casuintptr(SB), NOSPLIT, $0-25
JMP ·Cas64(SB)
TEXT ·CasRel(SB), NOSPLIT, $0-17
JMP ·Cas(SB)
// uint32 Xadd(uint32 volatile *val, int32 delta)
// Atomically:
// *val += delta;
// return *val;
TEXT ·Xadd(SB), NOSPLIT, $0-20
MOVQ ptr+0(FP), BX
MOVL delta+8(FP), AX
MOVL AX, CX
LOCK
XADDL AX, 0(BX)
ADDL CX, AX
MOVL AX, ret+16(FP)
RET
// uint64 Xadd64(uint64 volatile *val, int64 delta)
// Atomically:
// *val += delta;
// return *val;
TEXT ·Xadd64(SB), NOSPLIT, $0-24
MOVQ ptr+0(FP), BX
MOVQ delta+8(FP), AX
MOVQ AX, CX
LOCK
XADDQ AX, 0(BX)
ADDQ CX, AX
MOVQ AX, ret+16(FP)
RET
TEXT ·Xaddint32(SB), NOSPLIT, $0-20
JMP ·Xadd(SB)
TEXT ·Xaddint64(SB), NOSPLIT, $0-24
JMP ·Xadd64(SB)
TEXT ·Xadduintptr(SB), NOSPLIT, $0-24
JMP ·Xadd64(SB)
// uint32 Xchg(ptr *uint32, new uint32)
// Atomically:
// old := *ptr;
// *ptr = new;
// return old;
TEXT ·Xchg(SB), NOSPLIT, $0-20
MOVQ ptr+0(FP), BX
MOVL new+8(FP), AX
XCHGL AX, 0(BX)
MOVL AX, ret+16(FP)
RET
// uint64 Xchg64(ptr *uint64, new uint64)
// Atomically:
// old := *ptr;
// *ptr = new;
// return old;
TEXT ·Xchg64(SB), NOSPLIT, $0-24
MOVQ ptr+0(FP), BX
MOVQ new+8(FP), AX
XCHGQ AX, 0(BX)
MOVQ AX, ret+16(FP)
RET
TEXT ·Xchgint32(SB), NOSPLIT, $0-20
JMP ·Xchg(SB)
TEXT ·Xchgint64(SB), NOSPLIT, $0-24
JMP ·Xchg64(SB)
TEXT ·Xchguintptr(SB), NOSPLIT, $0-24
JMP ·Xchg64(SB)
TEXT ·StorepNoWB(SB), NOSPLIT, $0-16
MOVQ ptr+0(FP), BX
MOVQ val+8(FP), AX
XCHGQ AX, 0(BX)
RET
TEXT ·Store(SB), NOSPLIT, $0-12
MOVQ ptr+0(FP), BX
MOVL val+8(FP), AX
XCHGL AX, 0(BX)
RET
TEXT ·Store8(SB), NOSPLIT, $0-9
MOVQ ptr+0(FP), BX
MOVB val+8(FP), AX
XCHGB AX, 0(BX)
RET
TEXT ·Store64(SB), NOSPLIT, $0-16
MOVQ ptr+0(FP), BX
MOVQ val+8(FP), AX
XCHGQ AX, 0(BX)
RET
TEXT ·Storeint32(SB), NOSPLIT, $0-12
JMP ·Store(SB)
TEXT ·Storeint64(SB), NOSPLIT, $0-16
JMP ·Store64(SB)
TEXT ·Storeuintptr(SB), NOSPLIT, $0-16
JMP ·Store64(SB)
TEXT ·StoreRel(SB), NOSPLIT, $0-12
JMP ·Store(SB)
TEXT ·StoreRel64(SB), NOSPLIT, $0-16
JMP ·Store64(SB)
TEXT ·StoreReluintptr(SB), NOSPLIT, $0-16
JMP ·Store64(SB)
// void ·Or8(byte volatile*, byte);
TEXT ·Or8(SB), NOSPLIT, $0-9
MOVQ ptr+0(FP), AX
MOVB val+8(FP), BX
LOCK
ORB BX, (AX)
RET
// void ·And8(byte volatile*, byte);
TEXT ·And8(SB), NOSPLIT, $0-9
MOVQ ptr+0(FP), AX
MOVB val+8(FP), BX
LOCK
ANDB BX, (AX)
RET
// func Or(addr *uint32, v uint32)
TEXT ·Or(SB), NOSPLIT, $0-12
MOVQ ptr+0(FP), AX
MOVL val+8(FP), BX
LOCK
ORL BX, (AX)
RET
// func And(addr *uint32, v uint32)
TEXT ·And(SB), NOSPLIT, $0-12
MOVQ ptr+0(FP), AX
MOVL val+8(FP), BX
LOCK
ANDL BX, (AX)
RET
|
