Text file src/runtime/internal/atomic/asm_arm64.s
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 #include "textflag.h"
6
7 // bool Cas(uint32 *ptr, uint32 old, uint32 new)
8 // Atomically:
9 // if(*val == old){
10 // *val = new;
11 // return 1;
12 // } else
13 // return 0;
14 TEXT runtime∕internal∕atomic·Cas(SB), NOSPLIT, $0-17
15 MOVD ptr+0(FP), R0
16 MOVW old+8(FP), R1
17 MOVW new+12(FP), R2
18 again:
19 LDAXRW (R0), R3
20 CMPW R1, R3
21 BNE ok
22 STLXRW R2, (R0), R3
23 CBNZ R3, again
24 ok:
25 CSET EQ, R0
26 MOVB R0, ret+16(FP)
27 RET
28
29 TEXT runtime∕internal∕atomic·Casuintptr(SB), NOSPLIT, $0-25
30 B runtime∕internal∕atomic·Cas64(SB)
31
32 TEXT runtime∕internal∕atomic·CasRel(SB), NOSPLIT, $0-17
33 B runtime∕internal∕atomic·Cas(SB)
34
35 TEXT runtime∕internal∕atomic·Loaduintptr(SB), NOSPLIT, $0-16
36 B runtime∕internal∕atomic·Load64(SB)
37
38 TEXT runtime∕internal∕atomic·Loaduint(SB), NOSPLIT, $0-16
39 B runtime∕internal∕atomic·Load64(SB)
40
41 TEXT runtime∕internal∕atomic·Storeuintptr(SB), NOSPLIT, $0-16
42 B runtime∕internal∕atomic·Store64(SB)
43
44 TEXT runtime∕internal∕atomic·Xadduintptr(SB), NOSPLIT, $0-24
45 B runtime∕internal∕atomic·Xadd64(SB)
46
47 TEXT runtime∕internal∕atomic·Loadint64(SB), NOSPLIT, $0-16
48 B runtime∕internal∕atomic·Load64(SB)
49
50 TEXT runtime∕internal∕atomic·Xaddint64(SB), NOSPLIT, $0-24
51 B runtime∕internal∕atomic·Xadd64(SB)
52
53 // bool Casp1(void **val, void *old, void *new)
54 // Atomically:
55 // if(*val == old){
56 // *val = new;
57 // return 1;
58 // } else
59 // return 0;
60 TEXT runtime∕internal∕atomic·Casp1(SB), NOSPLIT, $0-25
61 B runtime∕internal∕atomic·Cas64(SB)
View as plain text