atomic_swap.S revision 1.7 
11.7Smatt/*	$NetBSD: atomic_swap.S,v 1.7 2014/03/07 07:17:54 matt 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 *
191.2Sad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
201.2Sad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
211.2Sad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
221.2Sad * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
231.2Sad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
241.2Sad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
251.2Sad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
261.2Sad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
271.2Sad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
281.2Sad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
291.2Sad * POSSIBILITY OF SUCH DAMAGE.
301.2Sad */
311.2Sad
321.2Sad#include "atomic_op_asm.h"
331.2Sad
341.7Smatt__RCSID("$NetBSD: atomic_swap.S,v 1.7 2014/03/07 07:17:54 matt Exp $")
351.6Smatt
361.2Sad	.text
371.5SchsENTRY(_atomic_swap_32)
381.7Smatt	mr	%r10,%r3
391.7Smatt1:	lwarx	%r3,0,%r10
401.7Smatt	stwcx.	%r4,0,%r10
411.7Smatt	beqlr+
421.7Smatt	b	1b
431.6SmattEND(_atomic_swap_32)
441.2SadATOMIC_OP_ALIAS(atomic_swap_32,_atomic_swap_32)
451.7Smatt
461.2SadATOMIC_OP_ALIAS(atomic_swap_uint,_atomic_swap_32)
471.2SadSTRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32)
481.7Smatt
491.7Smatt#if defined(_LP64)
501.7SmattENTRY(_atomic_swap_64)
511.7Smatt	mr	%r10,%r3
521.7Smatt1:	ldarx	%r3,0,%r10
531.7Smatt	stdcx.	%r4,0,%r10
541.7Smatt	beqlr+
551.7Smatt	b	1b
561.7SmattEND(_atomic_swap_64)
571.7SmattATOMIC_OP_ALIAS(atomic_swap_64,_atomic_swap_64)
581.7Smatt
591.7SmattATOMIC_OP_ALIAS(atomic_swap_ulong,_atomic_swap_64)
601.7SmattATOMIC_OP_ALIAS(atomic_swap_ptr,_atomic_swap_64)
611.7Smatt
621.7SmattSTRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_64)
631.7SmattSTRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_64)
641.7Smatt#else
651.2SadATOMIC_OP_ALIAS(atomic_swap_ulong,_atomic_swap_32)
661.7SmattATOMIC_OP_ALIAS(atomic_swap_ptr,_atomic_swap_32)
671.7Smatt
681.2SadSTRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_32)
691.2SadSTRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_32)
701.2Sad#endif
71