| /* SPDX-License-Identifier: BSD-2-Clause */ | |
| /* | |
| * Copyright (c) 2015-2016, Linaro Limited | |
| */ | |
| #include <asm.S> | |
| /* uint32_t atomic_inc32(uint32_t *v); */ | |
| FUNC atomic_inc32 , : | |
| ldaxr w1, [x0] | |
| add w1, w1, #1 | |
| stxr w2, w1, [x0] | |
| cmp w2, #0 | |
| bne atomic_inc32 | |
| mov w0, w1 | |
| ret | |
| END_FUNC atomic_inc32 | |
| /* uint32_t atomic_dec32(uint32_t *v); */ | |
| FUNC atomic_dec32 , : | |
| ldaxr w1, [x0] | |
| sub w1, w1, #1 | |
| stxr w2, w1, [x0] | |
| cmp w2, #0 | |
| bne atomic_dec32 | |
| mov w0, w1 | |
| ret | |
| END_FUNC atomic_dec32 | |