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/*-

 * Copyright (c) 1992 The Regents of the University of California.

 * All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * Ralph Campbell.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 * from: @(#)mips_opcode.h      7.1 (Berkeley) 3/19/92

 * via: mips_opcode.h,v 1.1 1994/03/10 16:15:10 (algorithmics)

 */

/*

 * Define the instruction formats and opcode values for the

 * MIPS instruction set.

 */

#ifndef _MIPS_OPCODE_H

#define _MIPS_OPCODE_H

/*

 * Define the instruction formats.

 */

typedef union {

    unsigned word;

#ifdef MIPSEL

    struct {

        unsigned imm: 16;

        unsigned rt: 5;

        unsigned rs: 5;

        unsigned op: 6;

    } IType;

    struct {

        unsigned target: 26;

        unsigned op: 6;

    } JType;

    struct {

        unsigned func: 6;

        unsigned shamt: 5;

        unsigned rd: 5;

        unsigned rt: 5;

        unsigned rs: 5;

        unsigned op: 6;

    } RType;

    struct {

        unsigned func: 6;

        unsigned fd: 5;

        unsigned fs: 5;

        unsigned ft: 5;

        unsigned fmt: 4;

        unsigned : 1;           /* always '1' */

        unsigned op: 6;         /* always '0x11' */

    } FRType;

#else

    struct {

        unsigned op: 6;

        unsigned rs: 5;

        unsigned rt: 5;

        unsigned imm: 16;

    } IType;

    struct {

        unsigned op: 6;

        unsigned target: 26;

    } JType;

    struct {

        unsigned op: 6;

        unsigned rs: 5;

        unsigned rt: 5;

        unsigned rd: 5;

        unsigned shamt: 5;

        unsigned func: 6;

    } RType;

    struct {

        unsigned op: 6;         /* always '0x11' */

        unsigned : 1;           /* always '1' */

        unsigned fmt: 4;

        unsigned func: 6;

        unsigned ft: 5;

        unsigned fs: 5;

        unsigned fd: 5;

    } FRType;

#endif

} InstFmt;

/*

 * Values for the 'op' field.

 */

#define OP_SPECIAL      000

#define OP_REGIMM       001

#define OP_J            002

#define OP_JAL          003

#define OP_BEQ          004

#define OP_BNE          005

#define OP_BLEZ         006

#define OP_BGTZ         007

#define OP_ADDI         010

#define OP_ADDIU        011

#define OP_SLTI         012

#define OP_SLTIU        013

#define OP_ANDI         014

#define OP_ORI          015

#define OP_XORI         016

#define OP_LUI          017

#define OP_COP0         020

#define OP_COP1         021

#define OP_COP2         022

#define OP_BEQL         024

#define OP_BNEL         025

#define OP_BLEZL        026

#define OP_BGTZL        027

#define OP_DADDI        030

#define OP_DADDIU       031

#define OP_LDL          032

#define OP_LDR          033

#define OP_LB           040

#define OP_LH           041

#define OP_LWL          042

#define OP_LW           043

#define OP_LBU          044

#define OP_LHU          045

#define OP_LWR          046

#define OP_LWU          047

#define OP_SB           050

#define OP_SH           051

#define OP_SWL          052

#define OP_SW           053

#define OP_SDL          054

#define OP_SDR          055

#define OP_SWR          056

#define OP_CACHE        057

#define OP_LL           060

#define OP_LWC1         061

#define OP_LWC2         062

#define OP_LLD          064

#define OP_LDC1         065

#define OP_LDC2         066

#define OP_LD           067

#define OP_SC           070

#define OP_SWC1         071

#define OP_SWC2         072

#define OP_SCD          074

#define OP_SDC1         075

#define OP_SDC2         076

#define OP_SD           077

/*

 * Values for the 'func' field when 'op' == OP_SPECIAL.

 */

#define OP_SLL          000

#define OP_SRL          002

#define OP_SRA          003

#define OP_SLLV         004

#define OP_SRLV         006

#define OP_SRAV         007

#define OP_JR           010

#define OP_JALR         011

#define OP_SYSCALL      014

#define OP_BREAK        015

#define OP_SYNC         017

#define OP_MFHI         020

#define OP_MTHI         021

#define OP_MFLO         022

#define OP_MTLO         023

#define OP_DSLLV        024

#define OP_DSRLV        026

#define OP_DSRAV        027

#define OP_MULT         030

#define OP_MULTU        031

#define OP_DIV          032

#define OP_DIVU         033

#define OP_DMULT        034

#define OP_DMULTU       035

#define OP_DDIV         036

#define OP_DDIVU        037

#define OP_ADD          040

#define OP_ADDU         041

#define OP_SUB          042

#define OP_SUBU         043

#define OP_AND          044

#define OP_OR           045

#define OP_XOR          046

#define OP_NOR          047

#define OP_SLT          052

#define OP_SLTU         053

#define OP_DADD         054

#define OP_DADDU        055

#define OP_DSUB         056

#define OP_DSUBU        057

#define OP_TGE          060

#define OP_TGEU         061

#define OP_TLT          062

#define OP_TLTU         063

#define OP_TEQ          064

#define OP_TNE          066

#define OP_DSLL         070

#define OP_DSRL         072

#define OP_DSRA         073

#define OP_DSLL32       074

#define OP_DSRL32       076

#define OP_DSRA32       077

/*

 * Values for the 'func' field when 'op' == OP_REGIMM.

 */

#define OP_BLTZ         000

#define OP_BGEZ         001

#define OP_BLTZL        002

#define OP_BGEZL        003

#define OP_TGEI         010

#define OP_TGEIU        011

#define OP_TLTI         012

#define OP_TLTIU        013

#define OP_TEQI         014

#define OP_TNEI         016

#define OP_BLTZAL       020

#define OP_BGEZAL       021

#define OP_BLTZALL      022

#define OP_BGEZALL      023

/*

 * Values for the 'rs' field when 'op' == OP_COPz.

 */

#define OP_MF           000

#define OP_DMF          001

#define OP_CF           002

#define OP_MT           004

#define OP_DMT          005

#define OP_CT           006

#define OP_BC           010

/*

 * Values for the 'rt' field when 'op' == OP_COPz and 'rt' == OP_BC.

 */

#define COPz_BCF        0x00

#define COPz_BCT        0x01

#define COPz_BCFL       0x02

#define COPz_BCTL       0x03

/*

 * Instructions with specal significance to debuggers.

 */

#define BREAK_INSTR     0x0005000d      /* instruction code for break */

#define NOP_INSTR       0x00000000      /* instruction code for no-op */

#endif  /* _MIPS_OPCODE_H */