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/* Table of opcodes for the DLX microprocess.

   Copyright 2002, 2010 Free Software Foundation, Inc.

   This file is part of GDB and GAS.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

   MA 02110-1301, USA.

   Initially created by Kuang Hwa Lin, 2002.   */

/* Following are the function codes for the Special OP (ALU).  */

#define  ALUOP       0x00000000

#define  SPECIALOP   0x00000000

#define  NOPF        0x00000000

#define  SLLF        0x00000004

#define  SRLF        0x00000006

#define  SRAF        0x00000007

#define  SEQUF       0x00000010

#define  SNEUF       0x00000011

#define  SLTUF       0x00000012

#define  SGTUF       0x00000013

#define  SLEUF       0x00000014

#define  SGEUF       0x00000015

#define  ADDF        0x00000020

#define  ADDUF       0x00000021

#define  SUBF        0x00000022

#define  SUBUF       0x00000023

#define  ANDF        0x00000024

#define  ORF         0x00000025

#define  XORF        0x00000026

#define  SEQF        0x00000028

#define  SNEF        0x00000029

#define  SLTF        0x0000002A

#define  SGTF        0x0000002B

#define  SLEF        0x0000002C

#define  SGEF        0x0000002D

  /* Following special functions was not mentioned in the

     Hennessy's book but was implemented in the RTL.  */

#define  MVTSF       0x00000030

#define  MVFSF       0x00000031

#define  BSWAPF      0x00000032

#define  LUTF        0x00000033

/* Following special functions was mentioned in the

   Hennessy's book but was not implemented in the RTL.  */

#define  MULTF       0x00000005

#define  MULTUF      0x00000006

#define  DIVF        0x00000007

#define  DIVUF       0x00000008

/* Following are the rest of the OPcodes:

   JOP    = (0x002 << 26), JALOP  = (0x003 << 26), BEQOP = (0x004 << 26),   BNEOP  = (0x005 << 26)

   ADDIOP = (0x008 << 26), ADDUIOP= (0x009 << 26), SUBIOP       = (0x00A << 26), SUBUIOP= (0x00B << 26)

   ANDIOP = (0x00C << 26), ORIOP  = (0x00D << 26), XORIOP = (0x00E << 26),  LHIOP  = (0x00F << 26)

   RFEOP  = (0x010 << 26), TRAPOP = (0x011 << 26), JROP = (0x012 << 26), JALROP = (0x013 << 26)

   BREAKOP= (0x014 << 26)

   SEQIOP = (0x018 << 26), SNEIOP = (0x019 << 26), SLTIOP = (0x01A << 26),  SGTIOP = (0x01B << 26)

   SLEIOP = (0x01C << 26), SGEIOP = (0x01D << 26)

   LBOP   = (0x020 << 26), LHOP   = (0x021 << 26), LWOP   = (0x023 << 26),  LBUOP  = (0x024 << 26)

   LHUOP  = (0x025 << 26), SBOP   = (0x028 << 26), SHOP   = (0x029 << 26),  SWOP   = (0x02B << 26)

   LSBUOP = (0x026 << 26), LSHU   = (0x027 << 26), LSW    = (0x02C << 26),

   SEQUIOP= (0x030 << 26), SNEUIOP= (0x031 << 26), SLTUIOP= (0x032 << 26),  SGTUIOP= (0x033 << 26)

   SLEUIOP= (0x034 << 26), SGEUIOP= (0x035 << 26)

   SLLIOP = (0x036 << 26), SRLIOP = (0x037 << 26), SRAIOP = (0x038 << 26).  */

#define  JOP         0x08000000

#define  JALOP       0x0c000000

#define  BEQOP       0x10000000

#define  BNEOP       0x14000000

#define  ADDIOP      0x20000000

#define  ADDUIOP     0x24000000

#define  SUBIOP      0x28000000

#define  SUBUIOP     0x2c000000

#define  ANDIOP      0x30000000

#define  ORIOP       0x34000000

#define  XORIOP      0x38000000

#define  LHIOP       0x3c000000

#define  RFEOP       0x40000000

#define  TRAPOP      0x44000000

#define  JROP        0x48000000

#define  JALROP      0x4c000000

#define  BREAKOP     0x50000000

#define  SEQIOP      0x60000000

#define  SNEIOP      0x64000000

#define  SLTIOP      0x68000000

#define  SGTIOP      0x6c000000

#define  SLEIOP      0x70000000

#define  SGEIOP      0x74000000

#define  LBOP        0x80000000

#define  LHOP        0x84000000

#define  LWOP        0x8c000000

#define  LBUOP       0x90000000

#define  LHUOP       0x94000000

#define  LDSTBU

#define  LDSTHU

#define  SBOP        0xa0000000

#define  SHOP        0xa4000000

#define  SWOP        0xac000000

#define  LDST

#define  SEQUIOP     0xc0000000

#define  SNEUIOP     0xc4000000

#define  SLTUIOP     0xc8000000

#define  SGTUIOP     0xcc000000

#define  SLEUIOP     0xd0000000

#define  SGEUIOP     0xd4000000

#define  SLLIOP      0xd8000000

#define  SRLIOP      0xdc000000

#define  SRAIOP      0xe0000000

/* Following 3 ops was added to provide the MP atonmic operation.  */

#define  LSBUOP      0x98000000

#define  LSHUOP      0x9c000000

#define  LSWOP       0xb0000000

/* Following opcode was defined in the Hennessy's book as

   "normal" opcode but was implemented in the RTL as special

   functions.  */

#if 0

#define  MVTSOP      0x50000000

#define  MVFSOP      0x54000000

#endif

struct dlx_opcode

{

  /* Name of the instruction.  */

  char *name;

  /* Opcode word.  */

  unsigned long opcode;

  /* A string of characters which describe the operands.

     Valid characters are:

     ,        Itself.  The character appears in the assembly code.

     a        rs1      The register number is in bits 21-25 of the instruction.

     b        rs2/rd   The register number is in bits 16-20 of the instruction.

     c        rd.      The register number is in bits 11-15 of the instruction.

     f        FUNC bits 0-10 of the instruction.

     i        An immediate operand is in bits 0-16 of the instruction. 0 extended

     I        An immediate operand is in bits 0-16 of the instruction. sign extended

     d        An 16 bit PC relative displacement.

     D        An immediate operand is in bits 0-25 of the instruction.

     N        No opperands needed, for nops.

     P        it can be a register or a 16 bit operand.  */

  char *args;

};

static const struct dlx_opcode dlx_opcodes[] =

  {

  /* Arithmetic and Logic R-TYPE instructions.  */

    { "nop",      (ALUOP|NOPF),   "N"     },  /* NOP                          */

    { "add",      (ALUOP|ADDF),   "c,a,b" },  /* Add                          */

    { "addu",     (ALUOP|ADDUF),  "c,a,b" },  /* Add Unsigned                 */

    { "sub",      (ALUOP|SUBF),   "c,a,b" },  /* SUB                          */

    { "subu",     (ALUOP|SUBUF),  "c,a,b" },  /* Sub Unsigned                 */

    { "mult",     (ALUOP|MULTF),  "c,a,b" },  /* MULTIPLY                     */

    { "multu",    (ALUOP|MULTUF), "c,a,b" },  /* MULTIPLY Unsigned            */

    { "div",      (ALUOP|DIVF),   "c,a,b" },  /* DIVIDE                       */

    { "divu",     (ALUOP|DIVUF),  "c,a,b" },  /* DIVIDE Unsigned              */

    { "and",      (ALUOP|ANDF),   "c,a,b" },  /* AND                          */

    { "or",       (ALUOP|ORF),    "c,a,b" },  /* OR                           */

    { "xor",      (ALUOP|XORF),   "c,a,b" },  /* Exclusive OR                 */

    { "sll",      (ALUOP|SLLF),   "c,a,b" },  /* SHIFT LEFT LOGICAL           */

    { "sra",      (ALUOP|SRAF),   "c,a,b" },  /* SHIFT RIGHT ARITHMETIC       */

    { "srl",      (ALUOP|SRLF),   "c,a,b" },  /* SHIFT RIGHT LOGICAL          */

    { "seq",      (ALUOP|SEQF),   "c,a,b" },  /* Set if equal                 */

    { "sne",      (ALUOP|SNEF),   "c,a,b" },  /* Set if not equal             */

    { "slt",      (ALUOP|SLTF),   "c,a,b" },  /* Set if less                  */

    { "sgt",      (ALUOP|SGTF),   "c,a,b" },  /* Set if greater               */

    { "sle",      (ALUOP|SLEF),   "c,a,b" },  /* Set if less or equal         */

    { "sge",      (ALUOP|SGEF),   "c,a,b" },  /* Set if greater or equal      */

    { "sequ",     (ALUOP|SEQUF),  "c,a,b" },  /* Set if equal unsigned        */

    { "sneu",     (ALUOP|SNEUF),  "c,a,b" },  /* Set if not equal unsigned    */

    { "sltu",     (ALUOP|SLTUF),  "c,a,b" },  /* Set if less unsigned         */

    { "sgtu",     (ALUOP|SGTUF),  "c,a,b" },  /* Set if greater unsigned      */

    { "sleu",     (ALUOP|SLEUF),  "c,a,b" },  /* Set if less or equal unsigned*/

    { "sgeu",     (ALUOP|SGEUF),  "c,a,b" },  /* Set if greater or equal      */

    { "mvts",     (ALUOP|MVTSF),  "c,a"   },  /* Move to special register     */

    { "mvfs",     (ALUOP|MVFSF),  "c,a"   },  /* Move from special register   */

    { "bswap",    (ALUOP|BSWAPF), "c,a,b" },  /* ??? Was not documented       */

    { "lut",      (ALUOP|LUTF),   "c,a,b" },  /* ????? same as above          */

    /* Arithmetic and Logical Immediate I-TYPE instructions.  */

    { "addi",     ADDIOP,         "b,a,I" },  /* Add Immediate                */

    { "addui",    ADDUIOP,        "b,a,i" },  /* Add Usigned Immediate        */

    { "subi",     SUBIOP,         "b,a,I" },  /* Sub Immediate                */

    { "subui",    SUBUIOP,        "b,a,i" },  /* Sub Unsigned Immedated       */

    { "andi",     ANDIOP,         "b,a,i" },  /* AND Immediate                */

    { "ori",      ORIOP,          "b,a,i" },  /* OR  Immediate                */

    { "xori",     XORIOP,         "b,a,i" },  /* Exclusive OR  Immediate      */

    { "slli",     SLLIOP,         "b,a,i" },  /* SHIFT LEFT LOCICAL Immediate */

    { "srai",     SRAIOP,         "b,a,i" },  /* SHIFT RIGHT ARITH. Immediate */

    { "srli",     SRLIOP,         "b,a,i" },  /* SHIFT RIGHT LOGICAL Immediate*/

    { "seqi",     SEQIOP,         "b,a,i" },  /* Set if equal                 */

    { "snei",     SNEIOP,         "b,a,i" },  /* Set if not equal             */

    { "slti",     SLTIOP,         "b,a,i" },  /* Set if less                  */

    { "sgti",     SGTIOP,         "b,a,i" },  /* Set if greater               */

    { "slei",     SLEIOP,         "b,a,i" },  /* Set if less or equal         */

    { "sgei",     SGEIOP,         "b,a,i" },  /* Set if greater or equal      */

    { "sequi",    SEQUIOP,        "b,a,i" },  /* Set if equal                 */

    { "sneui",    SNEUIOP,        "b,a,i" },  /* Set if not equal             */

    { "sltui",    SLTUIOP,        "b,a,i" },  /* Set if less                  */

    { "sgtui",    SGTUIOP,        "b,a,i" },  /* Set if greater               */

    { "sleui",    SLEUIOP,        "b,a,i" },  /* Set if less or equal         */

    { "sgeui",    SGEUIOP,        "b,a,i" },  /* Set if greater or equal      */

    /* Macros for I type instructions.  */

    { "mov",      ADDIOP,         "b,P"   },  /* a move macro                 */

    { "movu",     ADDUIOP,        "b,P"   },  /* a move macro, unsigned       */

#if 0

    /* Move special.  */

    { "mvts",     MVTSOP,         "b,a"   },  /* Move From Integer to Special */

    { "mvfs",     MVFSOP,         "b,a"   },  /* Move From Special to Integer */

#endif

    /* Load high Immediate I-TYPE instruction.  */

    { "lhi",      LHIOP,          "b,i"   },  /* Load High Immediate          */

    { "lui",      LHIOP,          "b,i"   },  /* Load High Immediate          */

    { "sethi",    LHIOP,          "b,i"   },  /* Load High Immediate          */

  /* LOAD/STORE BYTE 8 bits I-TYPE.  */

    { "lb",       LBOP,           "b,a,I" },  /* Load Byte                    */

    { "lbu",      LBUOP,          "b,a,I" },  /* Load Byte Unsigned           */

    { "ldstbu",   LSBUOP,         "b,a,I" },  /* Load store Byte Unsigned     */

    { "sb",       SBOP,           "b,a,I" },  /* Store Byte                   */

    /* LOAD/STORE HALFWORD 16 bits.  */

    { "lh",       LHOP,           "b,a,I" },  /* Load Halfword                */

    { "lhu",      LHUOP,          "b,a,I" },  /* Load Halfword Unsigned       */

    { "ldsthu",   LSHUOP,         "b,a,I" },  /* Load Store Halfword Unsigned */

    { "sh",       SHOP,           "b,a,I" },  /* Store Halfword               */

  /* LOAD/STORE WORD 32 bits.  */

    { "lw",       LWOP,           "b,a,I" },  /* Load Word                    */

    { "sw",       SWOP,           "b,a,I" },  /* Store Word                   */

    { "ldstw",    LSWOP,          "b,a,I" },  /* Load Store Word              */

  /* Branch PC-relative, 16 bits offset.  */

    { "beqz",     BEQOP,          "a,d" },    /* Branch if a == 0             */

    { "bnez",     BNEOP,          "a,d" },    /* Branch if a != 0             */

    { "beq",      BEQOP,          "a,d" },    /* Branch if a == 0             */

    { "bne",      BNEOP,          "a,d" },    /* Branch if a != 0             */

    /* Jumps Trap and RFE J-TYPE.  */

    { "j",        JOP,            "D" },      /* Jump, PC-relative 26 bits    */

    { "jal",      JALOP,          "D" },      /* JAL, PC-relative 26 bits     */

    { "break",    BREAKOP,        "D" },      /* break to OS                  */

    { "trap" ,    TRAPOP,         "D" },      /* TRAP to OS                   */

    { "rfe",      RFEOP,          "N" },      /* Return From Exception        */

    /* Macros.  */

    { "call",     JOP,            "D" },      /* Jump, PC-relative 26 bits    */

    /* Jumps Trap and RFE I-TYPE.  */

    { "jr",       JROP,           "a" },      /* Jump Register, Abs (32 bits) */

    { "jalr",     JALROP,         "a" },      /* JALR, Abs (32 bits)          */

    /* Macros.  */

    { "retr",     JROP,           "a" },      /* Jump Register, Abs (32 bits) */

    { "", 0x0, "" }             /* Dummy entry, not included in NUM_OPCODES.

                                   This lets code examine entry i + 1 without

                                   checking if we've run off the end of the table.  */

  };

const unsigned int num_dlx_opcodes = (((sizeof dlx_opcodes) / (sizeof dlx_opcodes[0])) - 1);