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      1  1.9  riastrad /*	$NetBSD: atomic_cas.S,v 1.9 2022/02/27 19:21:53 riastradh Exp $	*/
      2  1.2      matt 
      3  1.2      matt /*-
      4  1.2      matt  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      5  1.2      matt  * All rights reserved.
      6  1.2      matt  *
      7  1.2      matt  * Redistribution and use in source and binary forms, with or without
      8  1.2      matt  * modification, are permitted provided that the following conditions
      9  1.2      matt  * are met:
     10  1.2      matt  * 1. Redistributions of source code must retain the above copyright
     11  1.2      matt  *    notice, this list of conditions and the following disclaimer.
     12  1.2      matt  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.2      matt  *    notice, this list of conditions and the following disclaimer in the
     14  1.2      matt  *    documentation and/or other materials provided with the distribution.
     15  1.7     skrll  *
     16  1.2      matt  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  1.2      matt  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  1.2      matt  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  1.2      matt  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  1.2      matt  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  1.2      matt  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  1.2      matt  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  1.2      matt  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  1.2      matt  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  1.2      matt  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  1.2      matt  * POSSIBILITY OF SUCH DAMAGE.
     27  1.2      matt  */
     28  1.2      matt 
     29  1.2      matt #include <machine/asm.h>
     30  1.2      matt #include "atomic_op_asm.h"
     31  1.2      matt 
     32  1.9  riastrad RCSID("$NetBSD: atomic_cas.S,v 1.9 2022/02/27 19:21:53 riastradh Exp $")
     33  1.2      matt 
     34  1.2      matt 	.text
     35  1.2      matt 	.set	noat
     36  1.2      matt 	.set	noreorder
     37  1.2      matt 	.set	nomacro
     38  1.2      matt 
     39  1.2      matt LEAF(_atomic_cas_32)
     40  1.8     skrll 	LLSCSYNC
     41  1.2      matt 1:	INT_LL		v0, 0(a0)
     42  1.2      matt 	 nop
     43  1.2      matt 	bne		v0, a1, 2f
     44  1.2      matt 	 nop
     45  1.2      matt 	move		t0, a2
     46  1.2      matt 	INT_SC		t0, 0(a0)
     47  1.2      matt 	beq		t0, zero, 1b
     48  1.2      matt  	 nop
     49  1.2      matt 	move		v0, a1
     50  1.9  riastrad 	SYNC_PLUNGER
     51  1.2      matt 2:
     52  1.2      matt 	j		ra
     53  1.2      matt 	 nop
     54  1.2      matt END(_atomic_cas_32)
     55  1.2      matt ATOMIC_OP_ALIAS(atomic_cas_32, _atomic_cas_32)
     56  1.6       rin ATOMIC_OP_ALIAS(atomic_cas_32_ni, _atomic_cas_32)
     57  1.2      matt 
     58  1.2      matt #if !defined(__mips_o32)
     59  1.2      matt LEAF(_atomic_cas_64)
     60  1.8     skrll 	LLSCSYNC
     61  1.2      matt 1:	REG_LL		v0, 0(a0)
     62  1.2      matt 	 nop
     63  1.2      matt 	bne		v0, a1, 2f
     64  1.2      matt 	 nop
     65  1.2      matt 	move		t0, a2
     66  1.2      matt 	REG_SC		t0, 0(a0)
     67  1.2      matt 	beq		t0, zero, 1b
     68  1.2      matt  	 nop
     69  1.2      matt 	move		v0, a1
     70  1.9  riastrad 	SYNC_PLUNGER
     71  1.2      matt 2:
     72  1.2      matt 	j		ra
     73  1.2      matt 	 nop
     74  1.2      matt END(_atomic_cas_64)
     75  1.2      matt ATOMIC_OP_ALIAS(atomic_cas_64, _atomic_cas_64)
     76  1.5    martin ATOMIC_OP_ALIAS(atomic_cas_64_ni, _atomic_cas_64)
     77  1.2      matt #endif
     78  1.2      matt 
     79  1.2      matt #ifdef _LP64
     80  1.2      matt STRONG_ALIAS(_atomic_cas_ptr,		_atomic_cas_64)
     81  1.2      matt STRONG_ALIAS(_atomic_cas_ptr_ni,	_atomic_cas_64)
     82  1.2      matt STRONG_ALIAS(_atomic_cas_ulong,		_atomic_cas_64)
     83  1.2      matt STRONG_ALIAS(_atomic_cas_ulong_ni,	_atomic_cas_64)
     84  1.2      matt #else
     85  1.2      matt STRONG_ALIAS(_atomic_cas_ptr,		_atomic_cas_32)
     86  1.2      matt STRONG_ALIAS(_atomic_cas_ptr_ni,	_atomic_cas_32)
     87  1.2      matt STRONG_ALIAS(_atomic_cas_ulong,		_atomic_cas_32)
     88  1.2      matt STRONG_ALIAS(_atomic_cas_ulong_ni,	_atomic_cas_32)
     89  1.2      matt #endif
     90  1.2      matt STRONG_ALIAS(_atomic_cas_uint,		_atomic_cas_32)
     91  1.2      matt STRONG_ALIAS(_atomic_cas_uint_ni,	_atomic_cas_32)
     92  1.2      matt 
     93  1.2      matt ATOMIC_OP_ALIAS(atomic_cas_ptr,		_atomic_cas_ptr)
     94  1.2      matt ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,	_atomic_cas_ptr_ni)
     95  1.2      matt ATOMIC_OP_ALIAS(atomic_cas_uint,	_atomic_cas_uint)
     96  1.2      matt ATOMIC_OP_ALIAS(atomic_cas_uint_ni,	_atomic_cas_uint_ni)
     97  1.2      matt ATOMIC_OP_ALIAS(atomic_cas_ulong,	_atomic_cas_ulong)
     98  1.2      matt ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,	_atomic_cas_ulong_ni)
     99