1/* $NetBSD: atomic_dec.S,v 1.4 2012/03/14 16:50:34 christos 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 <machine/asm.h> 30#include "atomic_op_asm.h" 31 32RCSID("$NetBSD: atomic_dec.S,v 1.4 2012/03/14 16:50:34 christos Exp $") 33 34 .text 35 .set noreorder 36#ifdef _KERNEL_OPT 37#include "opt_cputype.h" 38#ifndef MIPS3_LOONGSON2F 39 .set noat 40 .set nomacro 41#endif 42#else /* _KERNEL_OPT */ 43 .set noat 44 .set nomacro 45#endif /* _KERNEL_OPT */ 46 47LEAF(_atomic_dec_32) 481: INT_LL t0, 0(a0) 49 nop 50 INT_ADDU t0, -1 51 INT_SC t0, 0(a0) 52 beq t0, zero, 1b 53 nop 54 j ra 55 nop 56END(_atomic_dec_32) 57ATOMIC_OP_ALIAS(atomic_dec_32, _atomic_dec_32) 58 59LEAF(_atomic_dec_32_nv) 601: INT_LL v0, 0(a0) 61 nop 62 INT_ADDU v0, -1 63 move t0, v0 64 INT_SC t0, 0(a0) 65 beq t0, zero, 1b 66 nop 67 j ra 68 nop 69END(_atomic_dec_32_nv) 70ATOMIC_OP_ALIAS(atomic_dec_32_nv, _atomic_dec_32_nv) 71 72#if !defined(__mips_o32) 73LEAF(_atomic_dec_64) 741: REG_LL t0, 0(a0) 75 nop 76 REG_ADDU t0, -1 77 REG_SC t0, 0(a0) 78 beq t0, zero, 1b 79 nop 80 j ra 81 nop 82END(_atomic_dec_64) 83ATOMIC_OP_ALIAS(atomic_dec_64, _atomic_dec_64) 84 85LEAF(_atomic_dec_64_nv) 861: REG_LL v0, 0(a0) 87 nop 88 REG_ADDU v0, -1 89 move t0, v0 90 REG_SC t0, 0(a0) 91 beq t0, zero, 1b 92 nop 93 j ra 94 nop 95END(_atomic_dec_64_nv) 96ATOMIC_OP_ALIAS(atomic_dec_64_nv, _atomic_dec_64_nv) 97#endif 98 99#ifdef _LP64 100STRONG_ALIAS(_atomic_dec_ptr, _atomic_dec_64) 101STRONG_ALIAS(_atomic_dec_ptr_nv, _atomic_dec_64_nv) 102STRONG_ALIAS(_atomic_dec_ulong, _atomic_dec_64) 103STRONG_ALIAS(_atomic_dec_ulong_nv, _atomic_dec_64_nv) 104#else 105STRONG_ALIAS(_atomic_dec_ptr, _atomic_dec_32) 106STRONG_ALIAS(_atomic_dec_ptr_nv, _atomic_dec_32_nv) 107STRONG_ALIAS(_atomic_dec_ulong, _atomic_dec_32) 108STRONG_ALIAS(_atomic_dec_ulong_nv, _atomic_dec_32_nv) 109#endif 110STRONG_ALIAS(_atomic_dec_uint, _atomic_dec_32) 111STRONG_ALIAS(_atomic_dec_uint_nv, _atomic_dec_32_nv) 112 113ATOMIC_OP_ALIAS(atomic_dec_ptr, _atomic_dec_ptr) 114ATOMIC_OP_ALIAS(atomic_dec_ptr_nv, _atomic_dec_ptr_nv) 115ATOMIC_OP_ALIAS(atomic_dec_uint, _atomic_dec_uint) 116ATOMIC_OP_ALIAS(atomic_dec_uint_nv, _atomic_dec_uint_nv) 117ATOMIC_OP_ALIAS(atomic_dec_ulong, _atomic_dec_ulong) 118ATOMIC_OP_ALIAS(atomic_dec_ulong_nv, _atomic_dec_ulong_nv) 119