1/* $NetBSD: atomic_dec.S,v 1.2 2009/12/14 00:39:00 matt 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 1.2 2009/12/14 00:39:00 matt Exp $") 34 35 .text 36 .set noat 37 .set noreorder 38 .set nomacro 39 40LEAF(_atomic_dec_32) 411: INT_LL t0, 0(a0) 42 nop 43 INT_ADDU t0, -1 44 INT_SC t0, 0(a0) 45 beq t0, zero, 1b 46 nop 47 j ra 48 nop 49END(_atomic_dec_32) 50ATOMIC_OP_ALIAS(atomic_dec_32, _atomic_dec_32) 51 52LEAF(_atomic_dec_32_nv) 531: INT_LL v0, 0(a0) 54 nop 55 INT_ADDU v0, -1 56 move t0, v0 57 INT_SC t0, 0(a0) 58 beq t0, zero, 1b 59 nop 60 j ra 61 nop 62END(_atomic_dec_32_nv) 63ATOMIC_OP_ALIAS(atomic_dec_32_nv, _atomic_dec_32_nv) 64 65#if !defined(__mips_o32) 66LEAF(_atomic_dec_64) 671: REG_LL t0, 0(a0) 68 nop 69 REG_ADDU t0, -1 70 REG_SC t0, 0(a0) 71 beq t0, zero, 1b 72 nop 73 j ra 74 nop 75END(_atomic_dec_64) 76ATOMIC_OP_ALIAS(atomic_dec_64, _atomic_dec_64) 77 78LEAF(_atomic_dec_64_nv) 791: REG_LL v0, 0(a0) 80 nop 81 REG_ADDU v0, -1 82 move t0, v0 83 REG_SC t0, 0(a0) 84 beq t0, zero, 1b 85 nop 86 j ra 87 nop 88END(_atomic_dec_64_nv) 89ATOMIC_OP_ALIAS(atomic_dec_64_nv, _atomic_dec_64_nv) 90#endif 91 92#ifdef _LP64 93STRONG_ALIAS(_atomic_dec_ptr, _atomic_dec_64) 94STRONG_ALIAS(_atomic_dec_ptr_nv, _atomic_dec_64_nv) 95STRONG_ALIAS(_atomic_dec_ulong, _atomic_dec_64) 96STRONG_ALIAS(_atomic_dec_ulong_nv, _atomic_dec_64_nv) 97#else 98STRONG_ALIAS(_atomic_dec_ptr, _atomic_dec_32) 99STRONG_ALIAS(_atomic_dec_ptr_nv, _atomic_dec_32_nv) 100STRONG_ALIAS(_atomic_dec_ulong, _atomic_dec_32) 101STRONG_ALIAS(_atomic_dec_ulong_nv, _atomic_dec_32_nv) 102#endif 103STRONG_ALIAS(_atomic_dec_uint, _atomic_dec_32) 104STRONG_ALIAS(_atomic_dec_uint_nv, _atomic_dec_32_nv) 105 106ATOMIC_OP_ALIAS(atomic_dec_ptr, _atomic_dec_ptr) 107ATOMIC_OP_ALIAS(atomic_dec_ptr_nv, _atomic_dec_ptr_nv) 108ATOMIC_OP_ALIAS(atomic_dec_uint, _atomic_dec_uint) 109ATOMIC_OP_ALIAS(atomic_dec_uint_nv, _atomic_dec_uint_nv) 110ATOMIC_OP_ALIAS(atomic_dec_ulong, _atomic_dec_ulong) 111ATOMIC_OP_ALIAS(atomic_dec_ulong_nv, _atomic_dec_ulong_nv) 112