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// func Cas(ptr *int32, old, new int32) bool
23// Atomically:
24// if *ptr == old {
25// *ptr = new
26// return true
27// } else {
28// return false
29// }
30TEXT ·Cas(SB),NOSPLIT,$0-17
31 MOVQ ptr+0(FP), BX
32 MOVL old+8(FP), AX
33 MOVL new+12(FP), CX
34 LOCK
35 CMPXCHGL CX, 0(BX)
36 SETEQ ret+16(FP)
37 RET
38
39// func Cas64(ptr *uint64, old, new uint64) bool
40// Atomically:
41// if *ptr == old {
42// *ptr = new
43// return true
44// } else {
45// return false
46// }
47TEXT ·Cas64(SB), NOSPLIT, $0-25
48 MOVQ ptr+0(FP), BX
49 MOVQ old+8(FP), AX
50 MOVQ new+16(FP), CX
51 LOCK
52 CMPXCHGQ CX, 0(BX)
53 SETEQ ret+24(FP)
54 RET
55
56// func Casp1(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool
57// Atomically:
58// if *ptr == old {
59// *ptr = new
60// return true
61// } else {
62// return false
63// }
64TEXT ·Casp1(SB), NOSPLIT, $0-25
65 MOVQ ptr+0(FP), BX
66 MOVQ old+8(FP), AX
67 MOVQ new+16(FP), CX
68 LOCK
69 CMPXCHGQ CX, 0(BX)
70 SETEQ ret+24(FP)
71 RET
72
73TEXT ·Casint32(SB), NOSPLIT, $0-17
74 JMP ·Cas(SB)
75
76TEXT ·Casint64(SB), NOSPLIT, $0-25
77 JMP ·Cas64(SB)
78
79TEXT ·Casuintptr(SB), NOSPLIT, $0-25
80 JMP ·Cas64(SB)
81
82TEXT ·CasRel(SB), NOSPLIT, $0-17
83 JMP ·Cas(SB)
84
85// uint32 Xadd(uint32 volatile *val, int32 delta)
86// Atomically:
87// *val += delta;
88// return *val;
89TEXT ·Xadd(SB), NOSPLIT, $0-20
90 MOVQ ptr+0(FP), BX
91 MOVL delta+8(FP), AX
92 MOVL AX, CX
93 LOCK
94 XADDL AX, 0(BX)
95 ADDL CX, AX
96 MOVL AX, ret+16(FP)
97 RET
98
99// uint64 Xadd64(uint64 volatile *val, int64 delta)
100// Atomically:
101// *val += delta;
102// return *val;
103TEXT ·Xadd64(SB), NOSPLIT, $0-24
104 MOVQ ptr+0(FP), BX
105 MOVQ delta+8(FP), AX
106 MOVQ AX, CX
107 LOCK
108 XADDQ AX, 0(BX)
109 ADDQ CX, AX
110 MOVQ AX, ret+16(FP)
111 RET
112
113TEXT ·Xaddint32(SB), NOSPLIT, $0-20
114 JMP ·Xadd(SB)
115
116TEXT ·Xaddint64(SB), NOSPLIT, $0-24
117 JMP ·Xadd64(SB)
118
119TEXT ·Xadduintptr(SB), NOSPLIT, $0-24
120 JMP ·Xadd64(SB)
121
122// uint8 Xchg(ptr *uint8, new uint8)
123// Atomically:
124// old := *ptr;
125// *ptr = new;
126// return old;
127TEXT ·Xchg8(SB), NOSPLIT, $0-17
128 MOVQ ptr+0(FP), BX
129 MOVB new+8(FP), AX
130 XCHGB AX, 0(BX)
131 MOVB AX, ret+16(FP)
132 RET
133
134// uint32 Xchg(ptr *uint32, new uint32)
135// Atomically:
136// old := *ptr;
137// *ptr = new;
138// return old;
139TEXT ·Xchg(SB), NOSPLIT, $0-20
140 MOVQ ptr+0(FP), BX
141 MOVL new+8(FP), AX
142 XCHGL AX, 0(BX)
143 MOVL AX, ret+16(FP)
144 RET
145
146// uint64 Xchg64(ptr *uint64, new uint64)
147// Atomically:
148// old := *ptr;
149// *ptr = new;
150// return old;
151TEXT ·Xchg64(SB), NOSPLIT, $0-24
152 MOVQ ptr+0(FP), BX
153 MOVQ new+8(FP), AX
154 XCHGQ AX, 0(BX)
155 MOVQ AX, ret+16(FP)
156 RET
157
158TEXT ·Xchgint32(SB), NOSPLIT, $0-20
159 JMP ·Xchg(SB)
160
161TEXT ·Xchgint64(SB), NOSPLIT, $0-24
162 JMP ·Xchg64(SB)
163
164TEXT ·Xchguintptr(SB), NOSPLIT, $0-24
165 JMP ·Xchg64(SB)
166
167TEXT ·StorepNoWB(SB), NOSPLIT, $0-16
168 MOVQ ptr+0(FP), BX
169 MOVQ val+8(FP), AX
170 XCHGQ AX, 0(BX)
171 RET
172
173TEXT ·Store(SB), NOSPLIT, $0-12
174 MOVQ ptr+0(FP), BX
175 MOVL val+8(FP), AX
176 XCHGL AX, 0(BX)
177 RET
178
179TEXT ·Store8(SB), NOSPLIT, $0-9
180 MOVQ ptr+0(FP), BX
181 MOVB val+8(FP), AX
182 XCHGB AX, 0(BX)
183 RET
184
185TEXT ·Store64(SB), NOSPLIT, $0-16
186 MOVQ ptr+0(FP), BX
187 MOVQ val+8(FP), AX
188 XCHGQ AX, 0(BX)
189 RET
190
191TEXT ·Storeint32(SB), NOSPLIT, $0-12
192 JMP ·Store(SB)
193
194TEXT ·Storeint64(SB), NOSPLIT, $0-16
195 JMP ·Store64(SB)
196
197TEXT ·Storeuintptr(SB), NOSPLIT, $0-16
198 JMP ·Store64(SB)
199
200TEXT ·StoreRel(SB), NOSPLIT, $0-12
201 JMP ·Store(SB)
202
203TEXT ·StoreRel64(SB), NOSPLIT, $0-16
204 JMP ·Store64(SB)
205
206TEXT ·StoreReluintptr(SB), NOSPLIT, $0-16
207 JMP ·Store64(SB)
208
209// void ·Or8(byte volatile*, byte);
210TEXT ·Or8(SB), NOSPLIT, $0-9
211 MOVQ ptr+0(FP), AX
212 MOVB val+8(FP), BX
213 LOCK
214 ORB BX, (AX)
215 RET
216
217// void ·And8(byte volatile*, byte);
218TEXT ·And8(SB), NOSPLIT, $0-9
219 MOVQ ptr+0(FP), AX
220 MOVB val+8(FP), BX
221 LOCK
222 ANDB BX, (AX)
223 RET
224
225// func Or(addr *uint32, v uint32)
226TEXT ·Or(SB), NOSPLIT, $0-12
227 MOVQ ptr+0(FP), AX
228 MOVL val+8(FP), BX
229 LOCK
230 ORL BX, (AX)
231 RET
232
233// func And(addr *uint32, v uint32)
234TEXT ·And(SB), NOSPLIT, $0-12
235 MOVQ ptr+0(FP), AX
236 MOVL val+8(FP), BX
237 LOCK
238 ANDL BX, (AX)
239 RET
240
241// func Or32(addr *uint32, v uint32) old uint32
242TEXT ·Or32(SB), NOSPLIT, $0-20
243 MOVQ ptr+0(FP), BX
244 MOVL val+8(FP), CX
245casloop:
246 MOVL CX, DX
247 MOVL (BX), AX
248 ORL AX, DX
249 LOCK
250 CMPXCHGL DX, (BX)
251 JNZ casloop
252 MOVL AX, ret+16(FP)
253 RET
254
255// func And32(addr *uint32, v uint32) old uint32
256TEXT ·And32(SB), NOSPLIT, $0-20
257 MOVQ ptr+0(FP), BX
258 MOVL val+8(FP), CX
259casloop:
260 MOVL CX, DX
261 MOVL (BX), AX
262 ANDL AX, DX
263 LOCK
264 CMPXCHGL DX, (BX)
265 JNZ casloop
266 MOVL AX, ret+16(FP)
267 RET
268
269// func Or64(addr *uint64, v uint64) old uint64
270TEXT ·Or64(SB), NOSPLIT, $0-24
271 MOVQ ptr+0(FP), BX
272 MOVQ val+8(FP), CX
273casloop:
274 MOVQ CX, DX
275 MOVQ (BX), AX
276 ORQ AX, DX
277 LOCK
278 CMPXCHGQ DX, (BX)
279 JNZ casloop
280 MOVQ AX, ret+16(FP)
281 RET
282
283// func And64(addr *uint64, v uint64) old uint64
284TEXT ·And64(SB), NOSPLIT, $0-24
285 MOVQ ptr+0(FP), BX
286 MOVQ val+8(FP), CX
287casloop:
288 MOVQ CX, DX
289 MOVQ (BX), AX
290 ANDQ AX, DX
291 LOCK
292 CMPXCHGQ DX, (BX)
293 JNZ casloop
294 MOVQ AX, ret+16(FP)
295 RET
296
297// func Anduintptr(addr *uintptr, v uintptr) old uintptr
298TEXT ·Anduintptr(SB), NOSPLIT, $0-24
299 JMP ·And64(SB)
300
301// func Oruintptr(addr *uintptr, v uintptr) old uintptr
302TEXT ·Oruintptr(SB), NOSPLIT, $0-24
303 JMP ·Or64(SB)
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