11.5Sriastrad/*	$NetBSD: atomic_swap.S,v 1.5 2022/04/06 22:47:55 riastradh 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.
181.5Sriastrad *
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
361.4SchsLEAF(_atomic_swap_32, 2)
371.2Sad1:	ldl_l	v0, 0(a0)
381.2Sad	mov	a1, t2
391.2Sad	stl_c	t2, 0(a0)
401.2Sad	beq	t2, 2f
411.2Sad	RET
421.2Sad2:	br	1b
431.2Sad	END(_atomic_swap_32)
441.2SadATOMIC_OP_ALIAS(atomic_swap_32,_atomic_swap_32)
451.2SadATOMIC_OP_ALIAS(atomic_swap_uint,_atomic_swap_32)
461.2SadSTRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32)
471.2Sad
481.4SchsLEAF(_atomic_swap_64, 2)
491.2Sad1:	ldq_l	v0, 0(a0)
501.2Sad	mov	a1, t2
511.2Sad	stq_c	t2, 0(a0)
521.2Sad	beq	t2, 2f
531.2Sad	RET
541.2Sad2:	br	1b
551.2Sad	END(_atomic_swap_64)
561.2SadATOMIC_OP_ALIAS(atomic_swap_64,_atomic_swap_64)
571.2SadATOMIC_OP_ALIAS(atomic_swap_ulong,_atomic_swap_64)
581.2SadSTRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_64)
591.2SadATOMIC_OP_ALIAS(atomic_swap_ptr,_atomic_swap_64)
601.2SadSTRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_64)
61