1*09ff5f3bSriastradh/* $NetBSD: atomic_dec.S,v 1.7 2022/04/06 22:47:56 riastradh Exp $ */ 2935eacf3Sad 3935eacf3Sad/*- 4935eacf3Sad * Copyright (c) 2007 The NetBSD Foundation, Inc. 5935eacf3Sad * All rights reserved. 6935eacf3Sad * 7935eacf3Sad * This code is derived from software contributed to The NetBSD Foundation 8935eacf3Sad * by Jason R. Thorpe. 9935eacf3Sad * 10935eacf3Sad * Redistribution and use in source and binary forms, with or without 11935eacf3Sad * modification, are permitted provided that the following conditions 12935eacf3Sad * are met: 13935eacf3Sad * 1. Redistributions of source code must retain the above copyright 14935eacf3Sad * notice, this list of conditions and the following disclaimer. 15935eacf3Sad * 2. Redistributions in binary form must reproduce the above copyright 16935eacf3Sad * notice, this list of conditions and the following disclaimer in the 17935eacf3Sad * documentation and/or other materials provided with the distribution. 18935eacf3Sad * 19935eacf3Sad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20935eacf3Sad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21935eacf3Sad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22935eacf3Sad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23935eacf3Sad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24935eacf3Sad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25935eacf3Sad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26935eacf3Sad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27935eacf3Sad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28935eacf3Sad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29935eacf3Sad * POSSIBILITY OF SUCH DAMAGE. 30935eacf3Sad */ 31935eacf3Sad 32935eacf3Sad#include "atomic_op_asm.h" 33935eacf3Sad 34935eacf3Sad .text 35935eacf3Sad 366740bb54SchsENTRY(_atomic_dec_32) 3707a0a325Smatt movl 4(%sp), %a0 3865726debSmatt subql #1, (%a0) 39935eacf3Sad rts 4065726debSmattEND(_atomic_dec_32) 41935eacf3SadATOMIC_OP_ALIAS(atomic_dec_32,_atomic_dec_32) 42935eacf3SadATOMIC_OP_ALIAS(atomic_dec_uint,_atomic_dec_32) 43935eacf3SadSTRONG_ALIAS(_atomic_dec_uint,_atomic_dec_32) 44935eacf3SadATOMIC_OP_ALIAS(atomic_dec_ulong,_atomic_dec_32) 45935eacf3SadSTRONG_ALIAS(_atomic_dec_ulong,_atomic_dec_32) 46935eacf3SadATOMIC_OP_ALIAS(atomic_dec_ptr,_atomic_dec_32) 47935eacf3SadSTRONG_ALIAS(_atomic_dec_ptr,_atomic_dec_32) 48935eacf3Sad 496740bb54SchsENTRY(_atomic_dec_32_nv) 5007a0a325Smatt movl 4(%sp), %a0 5107a0a325Smatt1: movl (%a0), %d0 52935eacf3Sad movl %d0, %d1 53935eacf3Sad subql #1, %d0 5465726debSmatt casl %d1, %d0, (%a0) 55935eacf3Sad bne 1b 56935eacf3Sad movl %d0, %a0 /* pointers return also in %a0 */ 57935eacf3Sad rts 5865726debSmattEND(_atomic_dec_32_nv) 59935eacf3SadATOMIC_OP_ALIAS(atomic_dec_32_nv,_atomic_dec_32_nv) 60935eacf3SadATOMIC_OP_ALIAS(atomic_dec_uint_nv,_atomic_dec_32_nv) 61935eacf3SadSTRONG_ALIAS(_atomic_dec_uint_nv,_atomic_dec_32_nv) 62935eacf3SadATOMIC_OP_ALIAS(atomic_dec_ulong_nv,_atomic_dec_32_nv) 63935eacf3SadSTRONG_ALIAS(_atomic_dec_ulong_nv,_atomic_dec_32_nv) 64935eacf3SadATOMIC_OP_ALIAS(atomic_dec_ptr_nv,_atomic_dec_32_nv) 65935eacf3SadSTRONG_ALIAS(_atomic_dec_ptr_nv,_atomic_dec_32_nv) 66