1*8e8c0784Sskrll/* $NetBSD: atomic_or_8.S,v 1.5 2021/07/28 07:32:20 skrll Exp $ */ 2918e319dSmatt 3918e319dSmatt/*- 4918e319dSmatt * Copyright (c) 2013 The NetBSD Foundation, Inc. 5918e319dSmatt * All rights reserved. 6918e319dSmatt * 7918e319dSmatt * This code is derived from software contributed to The NetBSD Foundation 8918e319dSmatt * by Matt Thomas <matt@3am-software.com> 9918e319dSmatt * 10918e319dSmatt * Redistribution and use in source and binary forms, with or without 11918e319dSmatt * modification, are permitted provided that the following conditions 12918e319dSmatt * are met: 13918e319dSmatt * 1. Redistributions of source code must retain the above copyright 14918e319dSmatt * notice, this list of conditions and the following disclaimer. 15918e319dSmatt * 2. Redistributions in binary form must reproduce the above copyright 16918e319dSmatt * notice, this list of conditions and the following disclaimer in the 17918e319dSmatt * documentation and/or other materials provided with the distribution. 18918e319dSmatt * 19918e319dSmatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20918e319dSmatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21918e319dSmatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22918e319dSmatt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23918e319dSmatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24918e319dSmatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25918e319dSmatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26918e319dSmatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27918e319dSmatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28918e319dSmatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29918e319dSmatt * POSSIBILITY OF SUCH DAMAGE. 30918e319dSmatt */ 31918e319dSmatt 32918e319dSmatt#include "atomic_op_asm.h" 33918e319dSmatt 345e911a38Sskrll#if defined(_ARM_ARCH_6) 35918e319dSmatt 36918e319dSmattENTRY_NP(_atomic_or_8) 37918e319dSmatt mov ip, r0 38918e319dSmatt1: ldrexb r0, [ip] /* load old value (to be returned) */ 39918e319dSmatt orrs r3, r0, r1 /* calculate new value */ 40918e319dSmatt strexb r2, r3, [ip] /* try to store */ 41918e319dSmatt cmp r2, #0 /* succeed? */ 42918e319dSmatt bne 1b /* no, try again */ 43918e319dSmatt RET /* return old value */ 44918e319dSmattEND(_atomic_or_8) 45918e319dSmatt 46918e319dSmattATOMIC_OP_ALIAS(atomic_or_8,_atomic_or_8) 47918e319dSmattATOMIC_OP_ALIAS(atomic_or_char,_atomic_or_8) 48504e8e68SjoergCRT_ALIAS(__atomic_fetch_or_1,_atomic_or_8) 49918e319dSmattSTRONG_ALIAS(_atomic_or_char,_atomic_or_8) 50918e319dSmatt 51*8e8c0784SskrllENTRY_NP(__sync_fetch_and_or_1) 52*8e8c0784Sskrll push {r4, lr} 53*8e8c0784Sskrll DMB 54*8e8c0784Sskrll bl _atomic_or_8 55*8e8c0784Sskrll DMB 56*8e8c0784Sskrll pop {r4, pc} 57*8e8c0784SskrllEND(__sync_fetch_and_or_1) 58*8e8c0784Sskrll 59*8e8c0784Sskrll 60918e319dSmattENTRY_NP(_atomic_or_8_nv) 61918e319dSmatt mov ip, r0 /* need r0 for return value */ 62918e319dSmatt1: ldrexb r0, [ip] /* load old value */ 63918e319dSmatt orrs r0, r0, r1 /* calculate new value (return value) */ 64918e319dSmatt strexb r2, r0, [ip] /* try to store */ 65918e319dSmatt cmp r2, #0 /* succeed? */ 66918e319dSmatt bne 1b /* no, try again? */ 67918e319dSmatt RET /* return new value */ 68918e319dSmattEND(_atomic_or_8_nv) 69918e319dSmatt 70918e319dSmattATOMIC_OP_ALIAS(atomic_or_8_nv,_atomic_or_8_nv) 71918e319dSmattATOMIC_OP_ALIAS(atomic_or_char_nv,_atomic_or_8_nv) 72918e319dSmattSTRONG_ALIAS(_atomic_or_char_nv,_atomic_or_8_nv) 73918e319dSmatt 74*8e8c0784SskrllENTRY_NP(__sync_or_and_fetch_1) 75*8e8c0784Sskrll push {r4, lr} 76*8e8c0784Sskrll DMB 77*8e8c0784Sskrll bl _atomic_or_8_nv 78*8e8c0784Sskrll DMB 79*8e8c0784Sskrll pop {r4, pc} 80*8e8c0784SskrllEND(__sync_or_and_fetch_1) 81*8e8c0784Sskrll 82918e319dSmatt#endif /* _ARM_ARCH_6 */ 83