1/* SPDX-License-Identifier: BSD-2-Clause */ 2/* 3 * Copyright (c) 2015-2016, Linaro Limited 4 * All rights reserved. 5 */ 6 7#include <asm.S> 8 9/* uint32_t atomic_inc32(uint32_t *v); */ 10FUNC atomic_inc32 , : 11 ldrex r1, [r0] 12 add r1, r1, #1 13 strex r2, r1, [r0] 14 cmp r2, #0 15 bne atomic_inc32 16 mov r0, r1 17 bx lr 18END_FUNC atomic_inc32 19 20/* uint32_t atomic_dec32(uint32_t *v); */ 21FUNC atomic_dec32 , : 22 ldrex r1, [r0] 23 sub r1, r1, #1 24 strex r2, r1, [r0] 25 cmp r2, #0 26 bne atomic_dec32 27 mov r0, r1 28 bx lr 29END_FUNC atomic_dec32 30