atomic_cas.S revision 1.6 
11.6Sriastrad/*	$NetBSD: atomic_cas.S,v 1.6 2022/04/06 22:47:55 riastradh Exp $	*/
21.2Sad
31.2Sad/*-
41.3Sad * Copyright (c) 2007, 2008 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.
181.6Sriastrad *
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
341.2Sad	.text
351.2Sad
361.5SchsLEAF(_atomic_cas_32, 3)
371.2Sad1:	mov	a2, t2
381.2Sad	ldl_l	v0, 0(a0)
391.2Sad	cmpeq	v0, a1, t1
401.2Sad	beq	t1, 2f
411.2Sad	stl_c	t2, 0(a0)
421.2Sad	beq	t2, 3f
431.2Sad2:	RET
441.2Sad3:	br	1b
451.2Sad	END(_atomic_cas_32)
461.3Sad
471.2SadATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
481.2SadATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
491.2SadSTRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
501.2Sad
511.3SadATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32)
521.3SadSTRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32)
531.3SadATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32)
541.3SadSTRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32)
551.3Sad
561.5SchsLEAF(_atomic_cas_64, 3)
571.2Sad1:	mov	a2, t2
581.2Sad	ldq_l	v0, 0(a0)
591.2Sad	cmpeq	v0, a1, t1
601.2Sad	beq	t1, 2f
611.2Sad	stq_c	t2, 0(a0)
621.2Sad	beq	t2, 3f
631.2Sad2:	RET
641.2Sad3:	br	1b
651.2Sad	END(_atomic_cas_64)
661.3Sad
671.2SadATOMIC_OP_ALIAS(atomic_cas_64,_atomic_cas_64)
681.2SadATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_64)
691.2SadSTRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_64)
701.2SadATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_64)
711.2SadSTRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_64)
721.3Sad
731.3SadATOMIC_OP_ALIAS(atomic_cas_64_ni,_atomic_cas_64)
741.3SadSTRONG_ALIAS(_atomic_cas_64_ni,_atomic_cas_64)
751.3SadATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_64)
761.3SadSTRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_64)
771.3SadATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_64)
781.3SadSTRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_64)
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