m68k/atomic/atomic_cas.S

1.2  ad /*	$NetBSD: atomic_cas.S,v 1.2 2007/11/29 17:09:32 ad Exp $	*/
1.2  ad
1.2  ad /*-
1.2  ad  * Copyright (c) 2007 The NetBSD Foundation, Inc.
1.2  ad  * All rights reserved.
1.2  ad  *
1.2  ad  * This code is derived from software contributed to The NetBSD Foundation
1.2  ad  * by Jason R. Thorpe.
1.2  ad  *
1.2  ad  * Redistribution and use in source and binary forms, with or without
1.2  ad  * modification, are permitted provided that the following conditions
1.2  ad  * are met:
1.2  ad  * 1. Redistributions of source code must retain the above copyright
1.2  ad  *    notice, this list of conditions and the following disclaimer.
1.2  ad  * 2. Redistributions in binary form must reproduce the above copyright
1.2  ad  *    notice, this list of conditions and the following disclaimer in the
1.2  ad  *    documentation and/or other materials provided with the distribution.
1.2  ad  * 3. All advertising materials mentioning features or use of this software
1.2  ad  *    must display the following acknowledgement:
1.2  ad  *	This product includes software developed by the NetBSD
1.2  ad  *	Foundation, Inc. and its contributors.
1.2  ad  * 4. Neither the name of The NetBSD Foundation nor the names of its
1.2  ad  *    contributors may be used to endorse or promote products derived
1.2  ad  *    from this software without specific prior written permission.
1.2  ad  *
1.2  ad  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
1.2  ad  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
1.2  ad  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.2  ad  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
1.2  ad  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.2  ad  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.2  ad  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.2  ad  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.2  ad  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.2  ad  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.2  ad  * POSSIBILITY OF SUCH DAMAGE.
1.2  ad  */
1.2  ad
1.2  ad #include "atomic_op_asm.h"
1.2  ad
1.2  ad 	.text
1.2  ad
1.2  ad ENTRY_NOPROFILE(_atomic_cas_32)
1.2  ad 	movl	%sp@(4), %a0
1.2  ad 	movl	%sp@(8), %d0
1.2  ad 	movl	%sp@(12), %d1
1.2  ad 	casl	%d0, %d1, %a0@
1.2  ad 	/* %d0 now contains the old value */
1.2  ad 	movl	%d0, %a0	/* pointers return also in %a0 */
1.2  ad 	rts
1.2  ad ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
1.2  ad ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
1.2  ad STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
1.2  ad ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_32)
1.2  ad STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32)
1.2  ad ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_32)
1.2  ad STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32)