1/* $NetBSD: atomic_dec.S,v 1.5 2015/06/01 23:16:54 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 <machine/asm.h> 30#include "atomic_op_asm.h" 31 32RCSID("$NetBSD: atomic_dec.S,v 1.5 2015/06/01 23:16:54 matt 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) 48#if defined(_MIPS_ARCH_OCTEONP) || defined(_MIPS_ARCH_OCTEON2) 49 li t0, -1 50 saa t0, (a0) 51#else 521: INT_LL t0, 0(a0) 53 nop 54 INT_ADDU t0, -1 55 INT_SC t0, 0(a0) 56 beq t0, zero, 1b 57 nop 58#endif 59 j ra 60 nop 61END(_atomic_dec_32) 62ATOMIC_OP_ALIAS(atomic_dec_32, _atomic_dec_32) 63 64LEAF(_atomic_dec_32_nv) 651: INT_LL v0, 0(a0) 66 nop 67 INT_ADDU v0, -1 68 move t0, v0 69 INT_SC t0, 0(a0) 70 beq t0, zero, 1b 71 nop 72 j ra 73 nop 74END(_atomic_dec_32_nv) 75ATOMIC_OP_ALIAS(atomic_dec_32_nv, _atomic_dec_32_nv) 76 77#if !defined(__mips_o32) 78LEAF(_atomic_dec_64) 79#if defined(_MIPS_ARCH_OCTEONP) || defined(_MIPS_ARCH_OCTEON2) 80 li t0, -1 81 saad t0, (a0) 82#else 831: REG_LL t0, 0(a0) 84 nop 85 REG_ADDU t0, -1 86 REG_SC t0, 0(a0) 87 beq t0, zero, 1b 88 nop 89#endif 90 j ra 91 nop 92END(_atomic_dec_64) 93ATOMIC_OP_ALIAS(atomic_dec_64, _atomic_dec_64) 94 95LEAF(_atomic_dec_64_nv) 961: REG_LL v0, 0(a0) 97 nop 98 REG_ADDU v0, -1 99 move t0, v0 100 REG_SC t0, 0(a0) 101 beq t0, zero, 1b 102 nop 103 j ra 104 nop 105END(_atomic_dec_64_nv) 106ATOMIC_OP_ALIAS(atomic_dec_64_nv, _atomic_dec_64_nv) 107#endif 108 109#ifdef _LP64 110STRONG_ALIAS(_atomic_dec_ptr, _atomic_dec_64) 111STRONG_ALIAS(_atomic_dec_ptr_nv, _atomic_dec_64_nv) 112STRONG_ALIAS(_atomic_dec_ulong, _atomic_dec_64) 113STRONG_ALIAS(_atomic_dec_ulong_nv, _atomic_dec_64_nv) 114#else 115STRONG_ALIAS(_atomic_dec_ptr, _atomic_dec_32) 116STRONG_ALIAS(_atomic_dec_ptr_nv, _atomic_dec_32_nv) 117STRONG_ALIAS(_atomic_dec_ulong, _atomic_dec_32) 118STRONG_ALIAS(_atomic_dec_ulong_nv, _atomic_dec_32_nv) 119#endif 120STRONG_ALIAS(_atomic_dec_uint, _atomic_dec_32) 121STRONG_ALIAS(_atomic_dec_uint_nv, _atomic_dec_32_nv) 122 123ATOMIC_OP_ALIAS(atomic_dec_ptr, _atomic_dec_ptr) 124ATOMIC_OP_ALIAS(atomic_dec_ptr_nv, _atomic_dec_ptr_nv) 125ATOMIC_OP_ALIAS(atomic_dec_uint, _atomic_dec_uint) 126ATOMIC_OP_ALIAS(atomic_dec_uint_nv, _atomic_dec_uint_nv) 127ATOMIC_OP_ALIAS(atomic_dec_ulong, _atomic_dec_ulong) 128ATOMIC_OP_ALIAS(atomic_dec_ulong_nv, _atomic_dec_ulong_nv) 129