atomic_swap.S revision 1.2 
11.2Sad/*	$NetBSD: atomic_swap.S,v 1.2 2007/11/28 21:39:50 ad Exp $	*/
21.2Sad
31.2Sad/*-
41.2Sad * Copyright (c) 2007 The NetBSD Foundation, Inc.
51.2Sad * All rights reserved.
61.2Sad *
71.2Sad * This code is derived from software contributed to The NetBSD Foundation
81.2Sad * by Jason R. Thorpe.
91.2Sad *
101.2Sad * Redistribution and use in source and binary forms, with or without
111.2Sad * modification, are permitted provided that the following conditions
121.2Sad * are met:
131.2Sad * 1. Redistributions of source code must retain the above copyright
141.2Sad *    notice, this list of conditions and the following disclaimer.
151.2Sad * 2. Redistributions in binary form must reproduce the above copyright
161.2Sad *    notice, this list of conditions and the following disclaimer in the
171.2Sad *    documentation and/or other materials provided with the distribution.
181.2Sad * 3. All advertising materials mentioning features or use of this software
191.2Sad *    must display the following acknowledgement:
201.2Sad *	This product includes software developed by the NetBSD
211.2Sad *	Foundation, Inc. and its contributors.
221.2Sad * 4. Neither the name of The NetBSD Foundation nor the names of its
231.2Sad *    contributors may be used to endorse or promote products derived
241.2Sad *    from this software without specific prior written permission.
251.2Sad *
261.2Sad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
271.2Sad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
281.2Sad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
291.2Sad * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
301.2Sad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
311.2Sad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
321.2Sad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
331.2Sad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
341.2Sad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
351.2Sad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
361.2Sad * POSSIBILITY OF SUCH DAMAGE.
371.2Sad */
381.2Sad
391.2Sad#include "atomic_op_asm.h"
401.2Sad
411.2Sad	.text
421.2Sad
431.2SadENTRY_NOPROFILE(_atomic_swap_32)
441.2Sad1:	lwarx	r10,0,r3
451.2Sad	stwcx.	r4,0,r3
461.2Sad	bne-	1b
471.2Sad	mr	r3,r10
481.2Sad	blr
491.2SadATOMIC_OP_ALIAS(atomic_swap_32,_atomic_swap_32)
501.2SadATOMIC_OP_ALIAS(atomic_swap_uint,_atomic_swap_32)
511.2SadSTRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32)
521.2Sad#if !defined(_LP64)
531.2SadATOMIC_OP_ALIAS(atomic_swap_ulong,_atomic_swap_32)
541.2SadSTRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_32)
551.2SadATOMIC_OP_ALIAS(atomic_swap_ptr,_atomic_swap_32)
561.2SadSTRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_32)
571.2Sad#endif
58