xref: /netbsd-src/common/lib/libc/arch/sparc64/atomic/atomic_dec.S (revision 09ff5f3b480cb7eb269d9eec28950bf196ce206c)
1*09ff5f3bSriastradh/*	$NetBSD: atomic_dec.S,v 1.9 2022/04/06 22:47:57 riastradh Exp $	*/
2f1d10eabSad
3f1d10eabSad/*-
4f1d10eabSad * Copyright (c) 2007 The NetBSD Foundation, Inc.
5f1d10eabSad * All rights reserved.
6f1d10eabSad *
7f1d10eabSad * This code is derived from software contributed to The NetBSD Foundation
8f1d10eabSad * by Jason R. Thorpe.
9f1d10eabSad *
10f1d10eabSad * Redistribution and use in source and binary forms, with or without
11f1d10eabSad * modification, are permitted provided that the following conditions
12f1d10eabSad * are met:
13f1d10eabSad * 1. Redistributions of source code must retain the above copyright
14f1d10eabSad *    notice, this list of conditions and the following disclaimer.
15f1d10eabSad * 2. Redistributions in binary form must reproduce the above copyright
16f1d10eabSad *    notice, this list of conditions and the following disclaimer in the
17f1d10eabSad *    documentation and/or other materials provided with the distribution.
18f1d10eabSad *
19f1d10eabSad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20f1d10eabSad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21f1d10eabSad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22f1d10eabSad * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23f1d10eabSad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24f1d10eabSad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25f1d10eabSad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26f1d10eabSad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27f1d10eabSad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28f1d10eabSad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29f1d10eabSad * POSSIBILITY OF SUCH DAMAGE.
30f1d10eabSad */
31f1d10eabSad
32f1d10eabSad#include "atomic_op_asm.h"
33f1d10eabSad
34f1d10eabSad	.text
35f1d10eabSad
366740bb54SchsENTRY(_atomic_dec_32)
37f1d10eabSad	ld	[%o0], %o2
38f1d10eabSad1:	add	%o2, -1, %o3
39f1d10eabSad	cas	[%o0], %o2, %o3
40f1d10eabSad	cmp	%o2, %o3
41f1d10eabSad	bne,a,pn %icc, 1b
42f1d10eabSad	 mov	%o3, %o2
43f1d10eabSad	retl
44f1d10eabSad	 add	%o2, -1, %o0
454d460dc0SadATOMIC_OP_ALIAS(atomic_dec_32,_atomic_dec_32)
464d460dc0SadATOMIC_OP_ALIAS(atomic_dec_uint,_atomic_dec_32)
474d460dc0SadSTRONG_ALIAS(_atomic_dec_uint,_atomic_dec_32)
48f1d10eabSad
494d460dc0SadATOMIC_OP_ALIAS(atomic_dec_32_nv,_atomic_dec_32)
504d460dc0SadSTRONG_ALIAS(_atomic_dec_32_nv,_atomic_dec_32)
514d460dc0SadATOMIC_OP_ALIAS(atomic_dec_uint_nv,_atomic_dec_32)
524d460dc0SadSTRONG_ALIAS(_atomic_dec_uint_nv,_atomic_dec_32)
53f1d10eabSad
546740bb54SchsENTRY(_atomic_dec_64)
55f1d10eabSad	ldx	[%o0], %o2
56f1d10eabSad1:	add	%o2, -1, %o3
57f1d10eabSad	casx	[%o0], %o2, %o3
58f1d10eabSad	cmp	%o2, %o3
5999adca9eSnakayama	bne,a,pn %xcc, 1b
60f1d10eabSad	 mov	%o3, %o2
612c01e1e1Snakayama#ifdef __arch64__
62f1d10eabSad	retl
63f1d10eabSad	 add	%o2, -1, %o0
642c01e1e1Snakayama#else
652c01e1e1Snakayama	add	%o2, -1, %o0
662c01e1e1Snakayama	SPLIT_RETL(%o0, %o0, %o1)
672c01e1e1Snakayama#endif
684d460dc0SadATOMIC_OP_ALIAS(atomic_dec_64,_atomic_dec_64)
69f1d10eabSad
704d460dc0SadATOMIC_OP_ALIAS(atomic_dec_64_nv,_atomic_dec_64)
714d460dc0SadSTRONG_ALIAS(_atomic_dec_64_nv,_atomic_dec_64)
7297e461c6Smrg
7397e461c6SmrgATOMIC_OP_ALIAS_SIZE(atomic_dec_ulong,_atomic_dec)
7497e461c6SmrgSTRONG_ALIAS_SIZE(_atomic_dec_ulong,_atomic_dec)
7597e461c6SmrgATOMIC_OP_ALIAS_SIZE(atomic_dec_ptr,_atomic_dec)
7697e461c6SmrgSTRONG_ALIAS_SIZE(_atomic_dec_ptr,_atomic_dec)
7797e461c6Smrg
7897e461c6SmrgATOMIC_OP_ALIAS_SIZE(atomic_dec_ulong_nv,_atomic_dec)
7997e461c6SmrgSTRONG_ALIAS_SIZE(_atomic_dec_ulong_nv,_atomic_dec)
8097e461c6SmrgATOMIC_OP_ALIAS_SIZE(atomic_dec_ptr_nv,_atomic_dec)
8197e461c6SmrgSTRONG_ALIAS_SIZE(_atomic_dec_ptr_nv,_atomic_dec)
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