11.2Sskrll/* $NetBSD: atomic_inc_64.S,v 1.2 2020/08/12 12:59:57 skrll Exp $ */ 21.1Smatt 31.1Smatt/*- 41.1Smatt * Copyright (c) 2014 The NetBSD Foundation, Inc. 51.1Smatt * All rights reserved. 61.1Smatt * 71.1Smatt * This code is derived from software contributed to The NetBSD Foundation 81.1Smatt * by Matt Thomas of 3am Software Foundry. 91.1Smatt * 101.1Smatt * Redistribution and use in source and binary forms, with or without 111.1Smatt * modification, are permitted provided that the following conditions 121.1Smatt * are met: 131.1Smatt * 1. Redistributions of source code must retain the above copyright 141.1Smatt * notice, this list of conditions and the following disclaimer. 151.1Smatt * 2. Redistributions in binary form must reproduce the above copyright 161.1Smatt * notice, this list of conditions and the following disclaimer in the 171.1Smatt * documentation and/or other materials provided with the distribution. 181.1Smatt * 191.1Smatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 201.1Smatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 211.1Smatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 221.1Smatt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 231.1Smatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 241.1Smatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 251.1Smatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 261.1Smatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 271.1Smatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 281.1Smatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 291.1Smatt * POSSIBILITY OF SUCH DAMAGE. 301.1Smatt */ 311.1Smatt 321.1Smatt#include "atomic_op_asm.h" 331.1Smatt 341.1SmattENTRY_NP(_atomic_inc_64) 351.1Smatt1: ldxr x2, [x0] /* load old value (return value) */ 361.1Smatt add x2, x2, #1 /* calculate new value */ 371.1Smatt stxr w3, x2, [x0] /* try to store */ 381.2Sskrll cbnz w3, 2f /* succeed? no, try again? */ 391.1Smatt ret /* return new value */ 401.2Sskrll2: b 1b 411.1SmattEND(_atomic_inc_64) 421.1Smatt 431.1SmattATOMIC_OP_ALIAS(atomic_inc_64,_atomic_inc_64) 441.1SmattATOMIC_OP_ALIAS(atomic_inc_ptr,_atomic_inc_64) 451.1SmattATOMIC_OP_ALIAS(atomic_inc_ulong,_atomic_inc_64) 461.1SmattSTRONG_ALIAS(_atomic_inc_ptr,_atomic_inc_64) 471.1SmattSTRONG_ALIAS(_atomic_inc_ulong,_atomic_inc_64) 481.1Smatt 491.1SmattENTRY_NP(_atomic_inc_64_nv) 501.1Smatt mov x4, x0 /* need r0 for return value */ 511.1Smatt1: ldxr x0, [x4] /* load old value */ 521.1Smatt add x0, x0, #1 /* calculate new value (return value) */ 531.1Smatt stxr w3, x0, [x4] /* try to store */ 541.2Sskrll cbnz w3, 2f /* succeed? no, try again? */ 551.1Smatt ret /* return new value */ 561.2Sskrll2: b 1b 571.1SmattEND(_atomic_inc_64_nv) 581.1Smatt 591.1SmattATOMIC_OP_ALIAS(atomic_inc_64_nv,_atomic_inc_64_nv) 601.1SmattATOMIC_OP_ALIAS(atomic_inc_ptr_nv,_atomic_inc_64_nv) 611.1SmattATOMIC_OP_ALIAS(atomic_inc_ulong_nv,_atomic_inc_64_nv) 621.1SmattSTRONG_ALIAS(_atomic_inc_ptr_nv,_atomic_inc_64_nv) 631.1SmattSTRONG_ALIAS(_atomic_inc_ulong_nv,_atomic_inc_64_nv) 64