1/* $NetBSD: atomic_swap.S,v 1.9 2022/04/06 22:47:56 riastradh Exp $ */ 2 3/*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 34__RCSID("$NetBSD: atomic_swap.S,v 1.9 2022/04/06 22:47:56 riastradh Exp $") 35 36 .text 37ENTRY(_atomic_swap_32) 38 mr %r10,%r3 391: lwarx %r3,0,%r10 40 IBM405_ERRATA77_DCBT(0,%r10) 41 stwcx. %r4,0,%r10 42 beqlr+ 43 b 1b 44END(_atomic_swap_32) 45ATOMIC_OP_ALIAS(atomic_swap_32,_atomic_swap_32) 46 47ATOMIC_OP_ALIAS(atomic_swap_uint,_atomic_swap_32) 48STRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32) 49 50#if defined(_LP64) 51ENTRY(_atomic_swap_64) 52 mr %r10,%r3 531: ldarx %r3,0,%r10 54 stdcx. %r4,0,%r10 55 beqlr+ 56 b 1b 57END(_atomic_swap_64) 58ATOMIC_OP_ALIAS(atomic_swap_64,_atomic_swap_64) 59 60ATOMIC_OP_ALIAS(atomic_swap_ulong,_atomic_swap_64) 61ATOMIC_OP_ALIAS(atomic_swap_ptr,_atomic_swap_64) 62 63STRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_64) 64STRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_64) 65#else 66ATOMIC_OP_ALIAS(atomic_swap_ulong,_atomic_swap_32) 67ATOMIC_OP_ALIAS(atomic_swap_ptr,_atomic_swap_32) 68 69STRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_32) 70STRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_32) 71#endif 72