1/* $NetBSD: atomic_cas_up.S,v 1.8 2020/03/09 11:21:54 skrll Exp $ */ 2 3/*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Steve C. Woodford. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/ras.h> 33#include <machine/asm.h> 34 35ENTRY(_atomic_cas_up) 36 .hidden _C_LABEL(_atomic_cas_up) 37 mov r3, r0 38 .align 0 39RAS_START_ASM_HIDDEN(_atomic_cas) 40 ldr r0, [r3] 41 cmp r0, r1 42#if defined(__thumb__) 43 beq 1f 44 str r2, [r3] 45#else 46 streq r2, [r3] 47#endif 48 .align 0 49RAS_END_ASM_HIDDEN(_atomic_cas) 501: RET 51END(_atomic_cas_up) 52 53#if defined(__HAVE_ASM_ATOMIC_CAS_64_UP) 54ARM_ENTRY(_atomic_cas_64_up) 55 push {r4-r5} 56 mov ip, r0 57 ldrd r4, r5, [sp, #8] 58 .align 0 59RAS_START_ASM_HIDDEN(_atomic_cas_64) 60 ldrd r0, r1, [ip] 61 cmp r0, r2 62 cmpeq r1, r3 63 strdeq r4, r5, [ip] 64 .align 0 65RAS_END_ASM_HIDDEN(_atomic_cas_64) 661: pop {r4-r5} 67 bx lr 68END(_atomic_cas_64_up) 69#endif /* __HAVE_ASM_ATOMIC_64_UP */ 70 71ENTRY(_atomic_cas_16_up) 72 mov r3, r0 73 .align 0 74RAS_START_ASM_HIDDEN(_atomic_cas_16) 75 ldrh r0, [r3] 76 cmp r0, r1 77#if defined(__thumb__) 78 beq 1f 79 strh r2, [r3] 80#else 81 strheq r2, [r3] 82#endif 83 .align 0 84RAS_END_ASM_HIDDEN(_atomic_cas_16) 851: RET 86END(_atomic_cas_16_up) 87 88ENTRY(_atomic_cas_8_up) 89 mov r3, r0 90 .align 0 91RAS_START_ASM_HIDDEN(_atomic_cas_8) 92 ldrb r0, [r3] 93 cmp r0, r1 94#if defined(__thumb__) 95 beq 1f 96 strb r2, [r3] 97#else 98 strbeq r2, [r3] 99#endif 100 .align 0 101RAS_END_ASM_HIDDEN(_atomic_cas_8) 1021: RET 103END(_atomic_cas_8_up) 104