1/* $NetBSD: atomic_dec.S,v 1.3 2011/08/27 13:23:52 bouyer Exp $ */ 2 3/*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30#include <machine/asm.h> 31#include "atomic_op_asm.h" 32 33RCSID("$NetBSD: atomic_dec.S,v 1.3 2011/08/27 13:23:52 bouyer Exp $") 34 35 .text 36 .set noreorder 37#ifdef _KERNEL_OPT 38#include "opt_cputype.h" 39#ifndef MIPS3_LOONGSON2F 40 .set noat 41 .set nomacro 42#endif 43#else /* _KERNEL_OPT */ 44 .set noat 45 .set nomacro 46#endif /* _KERNEL_OPT */ 47 48LEAF(_atomic_dec_32) 491: INT_LL t0, 0(a0) 50 nop 51 INT_ADDU t0, -1 52 INT_SC t0, 0(a0) 53 beq t0, zero, 1b 54 nop 55 j ra 56 nop 57END(_atomic_dec_32) 58ATOMIC_OP_ALIAS(atomic_dec_32, _atomic_dec_32) 59 60LEAF(_atomic_dec_32_nv) 611: INT_LL v0, 0(a0) 62 nop 63 INT_ADDU v0, -1 64 move t0, v0 65 INT_SC t0, 0(a0) 66 beq t0, zero, 1b 67 nop 68 j ra 69 nop 70END(_atomic_dec_32_nv) 71ATOMIC_OP_ALIAS(atomic_dec_32_nv, _atomic_dec_32_nv) 72 73#if !defined(__mips_o32) 74LEAF(_atomic_dec_64) 751: REG_LL t0, 0(a0) 76 nop 77 REG_ADDU t0, -1 78 REG_SC t0, 0(a0) 79 beq t0, zero, 1b 80 nop 81 j ra 82 nop 83END(_atomic_dec_64) 84ATOMIC_OP_ALIAS(atomic_dec_64, _atomic_dec_64) 85 86LEAF(_atomic_dec_64_nv) 871: REG_LL v0, 0(a0) 88 nop 89 REG_ADDU v0, -1 90 move t0, v0 91 REG_SC t0, 0(a0) 92 beq t0, zero, 1b 93 nop 94 j ra 95 nop 96END(_atomic_dec_64_nv) 97ATOMIC_OP_ALIAS(atomic_dec_64_nv, _atomic_dec_64_nv) 98#endif 99 100#ifdef _LP64 101STRONG_ALIAS(_atomic_dec_ptr, _atomic_dec_64) 102STRONG_ALIAS(_atomic_dec_ptr_nv, _atomic_dec_64_nv) 103STRONG_ALIAS(_atomic_dec_ulong, _atomic_dec_64) 104STRONG_ALIAS(_atomic_dec_ulong_nv, _atomic_dec_64_nv) 105#else 106STRONG_ALIAS(_atomic_dec_ptr, _atomic_dec_32) 107STRONG_ALIAS(_atomic_dec_ptr_nv, _atomic_dec_32_nv) 108STRONG_ALIAS(_atomic_dec_ulong, _atomic_dec_32) 109STRONG_ALIAS(_atomic_dec_ulong_nv, _atomic_dec_32_nv) 110#endif 111STRONG_ALIAS(_atomic_dec_uint, _atomic_dec_32) 112STRONG_ALIAS(_atomic_dec_uint_nv, _atomic_dec_32_nv) 113 114ATOMIC_OP_ALIAS(atomic_dec_ptr, _atomic_dec_ptr) 115ATOMIC_OP_ALIAS(atomic_dec_ptr_nv, _atomic_dec_ptr_nv) 116ATOMIC_OP_ALIAS(atomic_dec_uint, _atomic_dec_uint) 117ATOMIC_OP_ALIAS(atomic_dec_uint_nv, _atomic_dec_uint_nv) 118ATOMIC_OP_ALIAS(atomic_dec_ulong, _atomic_dec_ulong) 119ATOMIC_OP_ALIAS(atomic_dec_ulong_nv, _atomic_dec_ulong_nv) 120