| // 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. |
| |
| #include "textflag.h" |
| |
| // bool Cas(uint32 *ptr, uint32 old, uint32 new) |
| // Atomically: |
| // if(*val == old){ |
| // *val = new; |
| // return 1; |
| // } else |
| // return 0; |
| TEXT runtime∕internal∕atomic·Cas(SB), NOSPLIT, $0-17 |
| MOVD ptr+0(FP), R0 |
| MOVW old+8(FP), R1 |
| MOVW new+12(FP), R2 |
| again: |
| LDAXRW (R0), R3 |
| CMPW R1, R3 |
| BNE ok |
| STLXRW R2, (R0), R3 |
| CBNZ R3, again |
| ok: |
| CSET EQ, R0 |
| MOVB R0, ret+16(FP) |
| RET |
| |
| TEXT runtime∕internal∕atomic·Casuintptr(SB), NOSPLIT, $0-25 |
| B runtime∕internal∕atomic·Cas64(SB) |
| |
| TEXT runtime∕internal∕atomic·Loaduintptr(SB), NOSPLIT, $0-16 |
| B runtime∕internal∕atomic·Load64(SB) |
| |
| TEXT runtime∕internal∕atomic·Loaduint(SB), NOSPLIT, $0-16 |
| B runtime∕internal∕atomic·Load64(SB) |
| |
| TEXT runtime∕internal∕atomic·Storeuintptr(SB), NOSPLIT, $0-16 |
| B runtime∕internal∕atomic·Store64(SB) |
| |
| TEXT runtime∕internal∕atomic·Xadduintptr(SB), NOSPLIT, $0-24 |
| B runtime∕internal∕atomic·Xadd64(SB) |
| |
| TEXT runtime∕internal∕atomic·Loadint64(SB), NOSPLIT, $0-16 |
| B runtime∕internal∕atomic·Load64(SB) |
| |
| TEXT runtime∕internal∕atomic·Xaddint64(SB), NOSPLIT, $0-24 |
| B runtime∕internal∕atomic·Xadd64(SB) |
| |
| // bool Casp1(void **val, void *old, void *new) |
| // Atomically: |
| // if(*val == old){ |
| // *val = new; |
| // return 1; |
| // } else |
| // return 0; |
| TEXT runtime∕internal∕atomic·Casp1(SB), NOSPLIT, $0-25 |
| B runtime∕internal∕atomic·Cas64(SB) |
