1// Copyright 2015 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5// Note: some of these functions are semantically inlined
6// by the compiler (in src/cmd/compile/internal/gc/ssa.go).
7
8#include "textflag.h"
9
10TEXT ·Loaduintptr(SB), NOSPLIT, $0-16
11 JMP ·Load64(SB)
12
13TEXT ·Loaduint(SB), NOSPLIT, $0-16
14 JMP ·Load64(SB)
15
16TEXT ·Loadint32(SB), NOSPLIT, $0-12
17 JMP ·Load(SB)
18
19TEXT ·Loadint64(SB), NOSPLIT, $0-16
20 JMP ·Load64(SB)
21
22// bool Cas(int32 *val, int32 old, int32 new)
23// Atomically:
24// if(*val == old){
25// *val = new;
26// return 1;
27// } else
28// return 0;
29TEXT ·Cas(SB),NOSPLIT,$0-17
30 MOVQ ptr+0(FP), BX
31 MOVL old+8(FP), AX
32 MOVL new+12(FP), CX
33 LOCK
34 CMPXCHGL CX, 0(BX)
35 SETEQ ret+16(FP)
36 RET
37
38// bool ·Cas64(uint64 *val, uint64 old, uint64 new)
39// Atomically:
40// if(*val == old){
41// *val = new;
42// return 1;
43// } else {
44// return 0;
45// }
46TEXT ·Cas64(SB), NOSPLIT, $0-25
47 MOVQ ptr+0(FP), BX
48 MOVQ old+8(FP), AX
49 MOVQ new+16(FP), CX
50 LOCK
51 CMPXCHGQ CX, 0(BX)
52 SETEQ ret+24(FP)
53 RET
54
55// bool Casp1(void **val, void *old, void *new)
56// Atomically:
57// if(*val == old){
58// *val = new;
59// return 1;
60// } else
61// return 0;
62TEXT ·Casp1(SB), NOSPLIT, $0-25
63 MOVQ ptr+0(FP), BX
64 MOVQ old+8(FP), AX
65 MOVQ new+16(FP), CX
66 LOCK
67 CMPXCHGQ CX, 0(BX)
68 SETEQ ret+24(FP)
69 RET
70
71TEXT ·Casint32(SB), NOSPLIT, $0-17
72 JMP ·Cas(SB)
73
74TEXT ·Casint64(SB), NOSPLIT, $0-25
75 JMP ·Cas64(SB)
76
77TEXT ·Casuintptr(SB), NOSPLIT, $0-25
78 JMP ·Cas64(SB)
79
80TEXT ·CasRel(SB), NOSPLIT, $0-17
81 JMP ·Cas(SB)
82
83// uint32 Xadd(uint32 volatile *val, int32 delta)
84// Atomically:
85// *val += delta;
86// return *val;
87TEXT ·Xadd(SB), NOSPLIT, $0-20
88 MOVQ ptr+0(FP), BX
89 MOVL delta+8(FP), AX
90 MOVL AX, CX
91 LOCK
92 XADDL AX, 0(BX)
93 ADDL CX, AX
94 MOVL AX, ret+16(FP)
95 RET
96
97// uint64 Xadd64(uint64 volatile *val, int64 delta)
98// Atomically:
99// *val += delta;
100// return *val;
101TEXT ·Xadd64(SB), NOSPLIT, $0-24
102 MOVQ ptr+0(FP), BX
103 MOVQ delta+8(FP), AX
104 MOVQ AX, CX
105 LOCK
106 XADDQ AX, 0(BX)
107 ADDQ CX, AX
108 MOVQ AX, ret+16(FP)
109 RET
110
111TEXT ·Xaddint32(SB), NOSPLIT, $0-20
112 JMP ·Xadd(SB)
113
114TEXT ·Xaddint64(SB), NOSPLIT, $0-24
115 JMP ·Xadd64(SB)
116
117TEXT ·Xadduintptr(SB), NOSPLIT, $0-24
118 JMP ·Xadd64(SB)
119
120// uint8 Xchg(ptr *uint8, new uint8)
121// Atomically:
122// old := *ptr;
123// *ptr = new;
124// return old;
125TEXT ·Xchg8(SB), NOSPLIT, $0-17
126 MOVQ ptr+0(FP), BX
127 MOVB new+8(FP), AX
128 XCHGB AX, 0(BX)
129 MOVB AX, ret+16(FP)
130 RET
131
132// uint32 Xchg(ptr *uint32, new uint32)
133// Atomically:
134// old := *ptr;
135// *ptr = new;
136// return old;
137TEXT ·Xchg(SB), NOSPLIT, $0-20
138 MOVQ ptr+0(FP), BX
139 MOVL new+8(FP), AX
140 XCHGL AX, 0(BX)
141 MOVL AX, ret+16(FP)
142 RET
143
144// uint64 Xchg64(ptr *uint64, new uint64)
145// Atomically:
146// old := *ptr;
147// *ptr = new;
148// return old;
149TEXT ·Xchg64(SB), NOSPLIT, $0-24
150 MOVQ ptr+0(FP), BX
151 MOVQ new+8(FP), AX
152 XCHGQ AX, 0(BX)
153 MOVQ AX, ret+16(FP)
154 RET
155
156TEXT ·Xchgint32(SB), NOSPLIT, $0-20
157 JMP ·Xchg(SB)
158
159TEXT ·Xchgint64(SB), NOSPLIT, $0-24
160 JMP ·Xchg64(SB)
161
162TEXT ·Xchguintptr(SB), NOSPLIT, $0-24
163 JMP ·Xchg64(SB)
164
165TEXT ·StorepNoWB(SB), NOSPLIT, $0-16
166 MOVQ ptr+0(FP), BX
167 MOVQ val+8(FP), AX
168 XCHGQ AX, 0(BX)
169 RET
170
171TEXT ·Store(SB), NOSPLIT, $0-12
172 MOVQ ptr+0(FP), BX
173 MOVL val+8(FP), AX
174 XCHGL AX, 0(BX)
175 RET
176
177TEXT ·Store8(SB), NOSPLIT, $0-9
178 MOVQ ptr+0(FP), BX
179 MOVB val+8(FP), AX
180 XCHGB AX, 0(BX)
181 RET
182
183TEXT ·Store64(SB), NOSPLIT, $0-16
184 MOVQ ptr+0(FP), BX
185 MOVQ val+8(FP), AX
186 XCHGQ AX, 0(BX)
187 RET
188
189TEXT ·Storeint32(SB), NOSPLIT, $0-12
190 JMP ·Store(SB)
191
192TEXT ·Storeint64(SB), NOSPLIT, $0-16
193 JMP ·Store64(SB)
194
195TEXT ·Storeuintptr(SB), NOSPLIT, $0-16
196 JMP ·Store64(SB)
197
198TEXT ·StoreRel(SB), NOSPLIT, $0-12
199 JMP ·Store(SB)
200
201TEXT ·StoreRel64(SB), NOSPLIT, $0-16
202 JMP ·Store64(SB)
203
204TEXT ·StoreReluintptr(SB), NOSPLIT, $0-16
205 JMP ·Store64(SB)
206
207// void ·Or8(byte volatile*, byte);
208TEXT ·Or8(SB), NOSPLIT, $0-9
209 MOVQ ptr+0(FP), AX
210 MOVB val+8(FP), BX
211 LOCK
212 ORB BX, (AX)
213 RET
214
215// void ·And8(byte volatile*, byte);
216TEXT ·And8(SB), NOSPLIT, $0-9
217 MOVQ ptr+0(FP), AX
218 MOVB val+8(FP), BX
219 LOCK
220 ANDB BX, (AX)
221 RET
222
223// func Or(addr *uint32, v uint32)
224TEXT ·Or(SB), NOSPLIT, $0-12
225 MOVQ ptr+0(FP), AX
226 MOVL val+8(FP), BX
227 LOCK
228 ORL BX, (AX)
229 RET
230
231// func And(addr *uint32, v uint32)
232TEXT ·And(SB), NOSPLIT, $0-12
233 MOVQ ptr+0(FP), AX
234 MOVL val+8(FP), BX
235 LOCK
236 ANDL BX, (AX)
237 RET
238
239// func Or32(addr *uint32, v uint32) old uint32
240TEXT ·Or32(SB), NOSPLIT, $0-20
241 MOVQ ptr+0(FP), BX
242 MOVL val+8(FP), CX
243casloop:
244 MOVL CX, DX
245 MOVL (BX), AX
246 ORL AX, DX
247 LOCK
248 CMPXCHGL DX, (BX)
249 JNZ casloop
250 MOVL AX, ret+16(FP)
251 RET
252
253// func And32(addr *uint32, v uint32) old uint32
254TEXT ·And32(SB), NOSPLIT, $0-20
255 MOVQ ptr+0(FP), BX
256 MOVL val+8(FP), CX
257casloop:
258 MOVL CX, DX
259 MOVL (BX), AX
260 ANDL AX, DX
261 LOCK
262 CMPXCHGL DX, (BX)
263 JNZ casloop
264 MOVL AX, ret+16(FP)
265 RET
266
267// func Or64(addr *uint64, v uint64) old uint64
268TEXT ·Or64(SB), NOSPLIT, $0-24
269 MOVQ ptr+0(FP), BX
270 MOVQ val+8(FP), CX
271casloop:
272 MOVQ CX, DX
273 MOVQ (BX), AX
274 ORQ AX, DX
275 LOCK
276 CMPXCHGQ DX, (BX)
277 JNZ casloop
278 MOVQ AX, ret+16(FP)
279 RET
280
281// func And64(addr *uint64, v uint64) old uint64
282TEXT ·And64(SB), NOSPLIT, $0-24
283 MOVQ ptr+0(FP), BX
284 MOVQ val+8(FP), CX
285casloop:
286 MOVQ CX, DX
287 MOVQ (BX), AX
288 ANDQ AX, DX
289 LOCK
290 CMPXCHGQ DX, (BX)
291 JNZ casloop
292 MOVQ AX, ret+16(FP)
293 RET
294
295// func Anduintptr(addr *uintptr, v uintptr) old uintptr
296TEXT ·Anduintptr(SB), NOSPLIT, $0-24
297 JMP ·And64(SB)
298
299// func Oruintptr(addr *uintptr, v uintptr) old uintptr
300TEXT ·Oruintptr(SB), NOSPLIT, $0-24
301 JMP ·Or64(SB)
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