1*65d55bceSskrll/* $NetBSD: atomic_swap_32.S,v 1.5 2021/07/29 10:29:05 skrll Exp $ */ 2beb9c6d1Smatt 3beb9c6d1Smatt/*- 4beb9c6d1Smatt * Copyright (c) 2014 The NetBSD Foundation, Inc. 5beb9c6d1Smatt * All rights reserved. 6beb9c6d1Smatt * 7beb9c6d1Smatt * This code is derived from software contributed to The NetBSD Foundation 8beb9c6d1Smatt * by Matt Thomas of 3am Software Foundry. 9beb9c6d1Smatt * 10beb9c6d1Smatt * Redistribution and use in source and binary forms, with or without 11beb9c6d1Smatt * modification, are permitted provided that the following conditions 12beb9c6d1Smatt * are met: 13beb9c6d1Smatt * 1. Redistributions of source code must retain the above copyright 14beb9c6d1Smatt * notice, this list of conditions and the following disclaimer. 15beb9c6d1Smatt * 2. Redistributions in binary form must reproduce the above copyright 16beb9c6d1Smatt * notice, this list of conditions and the following disclaimer in the 17beb9c6d1Smatt * documentation and/or other materials provided with the distribution. 18beb9c6d1Smatt * 19beb9c6d1Smatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20beb9c6d1Smatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21beb9c6d1Smatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22beb9c6d1Smatt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23beb9c6d1Smatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24beb9c6d1Smatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25beb9c6d1Smatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26beb9c6d1Smatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27beb9c6d1Smatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28beb9c6d1Smatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29beb9c6d1Smatt * POSSIBILITY OF SUCH DAMAGE. 30beb9c6d1Smatt */ 31beb9c6d1Smatt 32beb9c6d1Smatt#include "atomic_op_asm.h" 33beb9c6d1Smatt 34beb9c6d1SmattENTRY_NP(_atomic_swap_32) 35beb9c6d1Smatt mov x4, x0 36beb9c6d1Smatt1: ldxr w0, [x4] 37beb9c6d1Smatt stxr w3, w1, [x4] 38e16659bbSskrll cbnz w3, 2f 39beb9c6d1Smatt ret 40e16659bbSskrll2: b 1b 41beb9c6d1SmattEND(_atomic_swap_32) 42beb9c6d1Smatt 43beb9c6d1SmattATOMIC_OP_ALIAS(atomic_swap_32,_atomic_swap_32) 44beb9c6d1SmattATOMIC_OP_ALIAS(atomic_swap_uint,_atomic_swap_32) 45beb9c6d1SmattSTRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32) 46beb9c6d1Smatt 47*65d55bceSskrllENTRY_NP(__sync_lock_test_and_set_4) 48*65d55bceSskrll mov x4, x0 49*65d55bceSskrll1: ldaxr w0, [x4] 50*65d55bceSskrll stxr w3, w1, [x4] 51*65d55bceSskrll cbnz w3, 2f 52*65d55bceSskrll ret 53*65d55bceSskrll2: b 1b 54*65d55bceSskrllEND(__sync_lock_test_and_set_4) 55*65d55bceSskrll 56beb9c6d1SmattENTRY_NP(__sync_lock_release_4) 57beb9c6d1Smatt stlr wzr, [x0] 58beb9c6d1Smatt ret 59beb9c6d1SmattEND(__sync_lock_release_4) 60