1 /* $NetBSD: mips_opcode.h,v 1.4 1994/10/26 21:09:46 cgd Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)mips_opcode.h 8.1 (Berkeley) 6/10/93 39 */ 40 41 /* 42 * Define the instruction formats and opcode values for the 43 * MIPS instruction set. 44 */ 45 46 /* 47 * Define the instruction formats. 48 */ 49 typedef union { 50 unsigned word; 51 52 #if BYTE_ORDER == LITTLE_ENDIAN 53 struct { 54 unsigned imm: 16; 55 unsigned rt: 5; 56 unsigned rs: 5; 57 unsigned op: 6; 58 } IType; 59 60 struct { 61 unsigned target: 26; 62 unsigned op: 6; 63 } JType; 64 65 struct { 66 unsigned func: 6; 67 unsigned shamt: 5; 68 unsigned rd: 5; 69 unsigned rt: 5; 70 unsigned rs: 5; 71 unsigned op: 6; 72 } RType; 73 74 struct { 75 unsigned func: 6; 76 unsigned fd: 5; 77 unsigned fs: 5; 78 unsigned ft: 5; 79 unsigned fmt: 4; 80 unsigned : 1; /* always '1' */ 81 unsigned op: 6; /* always '0x11' */ 82 } FRType; 83 #endif 84 } InstFmt; 85 86 /* 87 * Values for the 'op' field. 88 */ 89 #define OP_SPECIAL 000 90 #define OP_BCOND 001 91 #define OP_J 002 92 #define OP_JAL 003 93 #define OP_BEQ 004 94 #define OP_BNE 005 95 #define OP_BLEZ 006 96 #define OP_BGTZ 007 97 98 #define OP_ADDI 010 99 #define OP_ADDIU 011 100 #define OP_SLTI 012 101 #define OP_SLTIU 013 102 #define OP_ANDI 014 103 #define OP_ORI 015 104 #define OP_XORI 016 105 #define OP_LUI 017 106 107 #define OP_COP0 020 108 #define OP_COP1 021 109 #define OP_COP2 022 110 #define OP_COP3 023 111 112 #define OP_LB 040 113 #define OP_LH 041 114 #define OP_LWL 042 115 #define OP_LW 043 116 #define OP_LBU 044 117 #define OP_LHU 045 118 #define OP_LWR 046 119 120 #define OP_SB 050 121 #define OP_SH 051 122 #define OP_SWL 052 123 #define OP_SW 053 124 #define OP_SWR 056 125 126 #define OP_LWC0 060 127 #define OP_LWC1 061 128 #define OP_LWC2 062 129 #define OP_LWC3 063 130 131 #define OP_SWC0 070 132 #define OP_SWC1 071 133 #define OP_SWC2 072 134 #define OP_SWC3 073 135 136 /* 137 * Values for the 'func' field when 'op' == OP_SPECIAL. 138 */ 139 #define OP_SLL 000 140 #define OP_SRL 002 141 #define OP_SRA 003 142 #define OP_SLLV 004 143 #define OP_SRLV 006 144 #define OP_SRAV 007 145 146 #define OP_JR 010 147 #define OP_JALR 011 148 #define OP_SYSCALL 014 149 #define OP_BREAK 015 150 151 #define OP_MFHI 020 152 #define OP_MTHI 021 153 #define OP_MFLO 022 154 #define OP_MTLO 023 155 156 #define OP_MULT 030 157 #define OP_MULTU 031 158 #define OP_DIV 032 159 #define OP_DIVU 033 160 161 #define OP_ADD 040 162 #define OP_ADDU 041 163 #define OP_SUB 042 164 #define OP_SUBU 043 165 #define OP_AND 044 166 #define OP_OR 045 167 #define OP_XOR 046 168 #define OP_NOR 047 169 170 #define OP_SLT 052 171 #define OP_SLTU 053 172 173 /* 174 * Values for the 'func' field when 'op' == OP_BCOND. 175 */ 176 #define OP_BLTZ 000 177 #define OP_BGEZ 001 178 #define OP_BLTZAL 020 179 #define OP_BGEZAL 021 180 181 /* 182 * Values for the 'rs' field when 'op' == OP_COPz. 183 */ 184 #define OP_MF 000 185 #define OP_MT 004 186 #define OP_BCx 010 187 #define OP_BCy 014 188 #define OP_CF 002 189 #define OP_CT 006 190 191 /* 192 * Values for the 'rt' field when 'op' == OP_COPz. 193 */ 194 #define COPz_BC_TF_MASK 0x01 195 #define COPz_BC_TRUE 0x01 196 #define COPz_BC_FALSE 0x00 197