1/* $NetBSD: atomic_cas.S,v 1.6 2008/05/25 15:56:12 chs Exp $ */ 2 3/*- 4 * Copyright (c) 2007, 2008 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 .text 35 36ENTRY(_atomic_cas_32) 371: lwarx %r10,0,%r3 38 cmpw %r10,%r4 39 bne- 2f 40 stwcx. %r5,0,%r3 41 bne- 1b 422: mr %r3,%r10 43 blr 44 45ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32) 46ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32) 47STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32) 48#if !defined(_LP64) 49ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_32) 50STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32) 51ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_32) 52STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32) 53#endif 54 55ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32) 56STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32) 57ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32) 58STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32) 59#if !defined(_LP64) 60ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_32) 61STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_32) 62ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_32) 63STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_32) 64#endif 65