1/* $NetBSD: atomic_swap_16.S,v 1.5 2021/07/29 10:29:05 skrll Exp $ */ 2 3/*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 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 "atomic_op_asm.h" 33 34ENTRY_NP(_atomic_swap_16) 35 mov x4, x0 361: ldxrh w0, [x4] 37 stxrh w3, w1, [x4] 38 cbnz w3, 2f 39 ret 402: b 1b 41END(_atomic_swap_16) 42 43ATOMIC_OP_ALIAS(atomic_swap_16,_atomic_swap_16) 44ATOMIC_OP_ALIAS(atomic_swap_short,_atomic_swap_16) 45ATOMIC_OP_ALIAS(atomic_swap_ushort,_atomic_swap_16) 46STRONG_ALIAS(_atomic_swap_short,_atomic_swap_16) 47STRONG_ALIAS(_atomic_swap_ushort,_atomic_swap_16) 48 49ENTRY_NP(__sync_lock_test_and_set_2) 50 mov x4, x0 511: ldaxrh w0, [x4] 52 stxrh w3, w1, [x4] 53 cbnz w3, 2f 54 ret 552: b 1b 56END(__sync_lock_test_and_set_2) 57 58ENTRY_NP(__sync_lock_release_2) 59 stlrh wzr, [x0] 60 ret 61END(__sync_lock_release_2) 62