11.11Sskrll/* $NetBSD: atomic_inc_64.S,v 1.11 2021/07/28 07:32:20 skrll Exp $ */ 21.1Smatt/*- 31.2Smatt * Copyright (c) 2012 The NetBSD Foundation, Inc. 41.1Smatt * All rights reserved. 51.1Smatt * 61.1Smatt * This code is derived from software contributed to The NetBSD Foundation 71.1Smatt * by Matt Thomas <matt@3am-software.com> 81.1Smatt * 91.1Smatt * Redistribution and use in source and binary forms, with or without 101.1Smatt * modification, are permitted provided that the following conditions 111.1Smatt * are met: 121.1Smatt * 1. Redistributions of source code must retain the above copyright 131.1Smatt * notice, this list of conditions and the following disclaimer. 141.1Smatt * 2. Redistributions in binary form must reproduce the above copyright 151.1Smatt * notice, this list of conditions and the following disclaimer in the 161.1Smatt * documentation and/or other materials provided with the distribution. 171.1Smatt * 181.1Smatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 191.1Smatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 201.1Smatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 211.1Smatt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 221.1Smatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 231.1Smatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 241.1Smatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 251.1Smatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 261.1Smatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 271.1Smatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 281.1Smatt * POSSIBILITY OF SUCH DAMAGE. 291.1Smatt */ 301.1Smatt 311.1Smatt#include "atomic_op_asm.h" 321.1Smatt 331.10Sskrll#if defined(_ARM_ARCH_6) 341.1Smatt 351.7SmattENTRY_NP(_atomic_inc_64_nv) 361.7Smatt mov ip, r0 /* need r0 for return value */ 371.9Sjoerg1: ldrexd r0, r1, [ip] /* load old value */ 381.4Smatt adds LO, LO, #1 /* calculate new value (return value) */ 391.8Smatt adcs HI, HI, #0 /* fold carry into high */ 401.9Sjoerg strexd r2, r0, r1, [ip] /* try to store */ 411.6Smatt cmp r2, #0 /* succeed? */ 421.1Smatt bne 1b /* no, try again? */ 431.1Smatt RET /* return new value */ 441.7SmattEND(_atomic_inc_64_nv) 451.7Smatt 461.7SmattSTRONG_ALIAS(_atomic_inc_64,_atomic_inc_64_nv) 471.1SmattATOMIC_OP_ALIAS(atomic_inc_64_nv,_atomic_inc_64_nv) 481.7SmattATOMIC_OP_ALIAS(atomic_inc_64,_atomic_inc_64) 491.1Smatt 501.3Schs#endif /* _ARM_ARCH_6 */ 51