Source code of Windows XP (NT5)
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/*++ BUILD Version: 0001 // Increment this if a change has global effects
Copyright (c) 1993-1999 Microsoft Corporation
Module Name:
mipsinst.h
Abstract:
Mips instruction and floating constant definitions.
Author:
David N. Cutler (davec) 8-May-1992
Revision History:
--*/
#ifndef _MIPSINST_
#define _MIPSINST_
#if _MSC_VER > 1000
#pragma once
#endif
//
// Define MIPS instruction format structures.
//
typedef union _MIPS_INSTRUCTION { ULONG Long; UCHAR Byte[4];
struct { ULONG Target : 26; ULONG Opcode : 6; } j_format;
struct { LONG Simmediate : 16; ULONG Rt : 5; ULONG Rs : 5; ULONG Opcode : 6; } i_format;
struct { ULONG Uimmediate : 16; ULONG Rt : 5; ULONG Rs : 5; ULONG Opcode : 6; } u_format;
struct { ULONG Function : 6; ULONG Re : 5; ULONG Rd : 5; ULONG Rt : 5; ULONG Rs : 5; ULONG Opcode : 6; } r_format;
struct { ULONG Function : 6; ULONG Re : 5; ULONG Rd : 5; ULONG Rt : 5; ULONG Format : 4; ULONG Fill1 : 1; ULONG Opcode : 6; } f_format;
struct { ULONG Function : 6; ULONG Fd : 5; ULONG Fs : 5; ULONG Ft : 5; ULONG Format : 4; ULONG Fill1 : 1; ULONG Opcode : 6; } c_format;
} MIPS_INSTRUCTION, *PMIPS_INSTRUCTION;
//
// Define MIPS instruction opcode values.
//
#define SPEC_OP 0x0 // special opcode - use function field
#define BCOND_OP 0x1 // condition branch
#define J_OP 0x2 // unconditional jump
#define JAL_OP 0x3 // jump and link
#define BEQ_OP 0x4 // branch equal
#define BNE_OP 0x5 // branch not equal
#define BLEZ_OP 0x6 // branch less than or equal
#define BGTZ_OP 0x7 // branch greater than
#define ADDI_OP 0x8 // add immediate signed integer
#define ADDIU_OP 0x9 // add immediate unsigned integer
#define SLTI_OP 0xa // set less than signed integer
#define SLTIU_OP 0xb // set less than unsigned integer
#define ANDI_OP 0xc // and unsigned immediate integer
#define ORI_OP 0xd // or unsigned immediate integer
#define XORI_OP 0xe // exclusive or unsigned immediate
#define LUI_OP 0xf // load upper immediate integer
#define COP0_OP 0x10 // coprocessor 0 operation
#define COP1_OP 0x11 // coprocessor 1 operation
#define BEQL_OP 0x14 // branch equal likely
#define BNEL_OP 0x15 // branch not equal likely
#define BLEZL_OP 0x16 // branch less than or equal likely
#define BGTZL_OP 0x17 // branch greater than likely
#define LDL_OP 0x1a // load double left integer
#define LDR_OP 0x1b // load double right integer
#define LB_OP 0x20 // load byte signed integer
#define LH_OP 0x21 // load halfword signed integer
#define LWL_OP 0x22 // load word left integer
#define LW_OP 0x23 // load word integer
#define LBU_OP 0x24 // load byte unsigned integer
#define LHU_OP 0x25 // load halfword unsigned integer
#define LWR_OP 0x26 // load word right integer
#define LWU_OP 0x27 // load word unsigned integer
#define SB_OP 0x28 // store byte integer
#define SH_OP 0x29 // store halfword integer
#define SWL_OP 0x2a // store word left integer
#define SW_OP 0x2b // store word integer register
#define SDL_OP 0x2c // store double left integer
#define SDR_OP 0x2d // store double right integer
#define SWR_OP 0x2e // store word right integer
#define CACHE_OP 0x2f // cache operation
#define LL_OP 0x30 // load linked integer register
#define LWC1_OP 0x31 // load word floating
#define LWC2_OP 0x32 // load word coprocessor 2
#define LLD_OP 0x34 // load locked double integer
#define LDC1_OP 0x35 // load word double floating
#define LDC2_OP 0x36 // load double coprocessor 2
#define LD_OP 0x37 // load double integer
#define SC_OP 0x38 // store conditional word integer
#define SWC1_OP 0x39 // store word floating
#define SWC2_OP 0x3a // store double coprocessor 2
#define SDC_OP 0x3c // store conditional double integer
#define SDC1_OP 0x3d // store double floating
#define SDC2_OP 0x3e // store double copreocessor 2
#define SD_OP 0x3f // store double integer register
//
// Define special function subopcodes.
//
#define SLL_OP 0x0 // shift left logical integer
#define SRL_OP 0x2 // shift right logical integer
#define SRA_OP 0x3 // shift right arithmetic integer
#define SLLV_OP 0x4 // shift left logical variable integer
#define SRLV_OP 0x6 // shift right logical variable integer
#define SRAV_OP 0x7 // shift right arithmetic variable integer
#define JR_OP 0x8 // jump register
#define JALR_OP 0x9 // jump and link register
#define SYSCALL_OP 0xc // system call trap
#define BREAK_OP 0xd // breakpoint trap
#define MFHI_OP 0x10 // more from high integer
#define MTHI_OP 0x11 // move to high integer
#define MFLO_OP 0x12 // move from low integer
#define MTLO_OP 0x13 // move to low integer
#define MULT_OP 0x18 // multiply signed integer
#define MULTU_OP 0x19 // multiply unsigned integer
#define DIV_OP 0x1a // divide signed integer
#define DIVU_OP 0x1b // divide unsigned integer
#define ADD_OP 0x20 // add signed integer
#define ADDU_OP 0x21 // add unsigned integer
#define SUP_OP 0x22 // subtract signed integer
#define SUBU_OP 0x23 // subtract unsigned integer
#define AND_OP 0x24 // and integer
#define OR_OP 0x25 // or integer
#define XOR_OP 0x26 // exclusive or integer
#define NOR_OP 0x27 // nor integer
#define SLT_OP 0x2a // set less signed integer
#define SLTU_OP 0x2b // set less unsigned integer
//
// Define branch conditional subopcodes.
//
#define BLTZ_OP 0x0 // branch less that zero integer
#define BGEZ_OP 0x1 // branch greater than or equal zero integer
#define BLTZL_OP 0x2 // branch less that zero integer liekly
#define BGEZL_OP 0x3 // branch greater than or equal zero integer likely
#define BLTZAL_OP 0x10 // branch less than zero integer and link
#define BGEZAL_OP 0x11 // branch greater than or equal zero integer and link
#define BLTZALL_OP 0x12 // branch less than zero integer and link likely
#define BGEZALL_OP 0x13 // branch greater than or equal zero integer and link likely
//
// Coprocessor branch true and false subfunctions and mask values.
//
#define COPz_BC_MASK 0x3e10000 // coprocessor z branch condition mask
#define COPz_BF 0x1000000 // coprocessor z branch false subfunction
#define COPz_BT 0x1010000 // coprocessor z branch true subfunction
//
// Define floating coprocessor 1 opcodes.
//
#define FLOAT_ADD 0 // floating add
#define FLOAT_SUBTRACT 1 // floating subtract
#define FLOAT_MULTIPLY 2 // floating multiply
#define FLOAT_DIVIDE 3 // floating divide
#define FLOAT_SQUARE_ROOT 4 // floating square root
#define FLOAT_ABSOLUTE 5 // floating absolute value
#define FLOAT_MOVE 6 // floating move
#define FLOAT_NEGATE 7 // floating negate
#define FLOAT_ROUND_QUADWORD 8 // floating round to longword
#define FLOAT_TRUNC_QUADWORD 9 // floating truncate to longword
#define FLOAT_CEIL_QUADWORD 10 // floating ceiling
#define FLOAT_FLOOR_QUADWORD 11 // floating floor
#define FLOAT_ROUND_LONGWORD 12 // floating round to longword
#define FLOAT_TRUNC_LONGWORD 13 // floating truncate to longword
#define FLOAT_CEIL_LONGWORD 14 // floating ceiling
#define FLOAT_FLOOR_LONGWORD 15 // floating floor
#define FLOAT_ILLEGAL 16 // illegal floating opcode
#define FLOAT_COMPARE_SINGLE 17 // floating compare single
#define FLOAT_COMPARE_DOUBLE 18 // floating compare double
#define FLOAT_CONVERT_SINGLE 32 // floating convert to single
#define FLOAT_CONVERT_DOUBLE 33 // floating convert to double
#define FLOAT_CONVERT_LONGWORD 36 // floating convert to longword integer
#define FLOAT_CONVERT_QUADWORD 37 // floating convert to quadword integer
#define FLOAT_COMPARE 48 // starting floating compare code
//
// Define floating format values.
//
#define FORMAT_SINGLE 0 // single floating format
#define FORMAT_DOUBLE 1 // double floating format
#define FORMAT_LONGWORD 4 // longword integer format
#define FORMAT_QUADWORD 5 // quadword integer format
//
// Define jump indirect return address register.
//
#define JUMP_RA 0x3e00008 // jump indirect return address
//
// Define maximum and minimum single and double exponent values.
//
#define DOUBLE_MAXIMUM_EXPONENT 2047
#define DOUBLE_MINIMUM_EXPONENT 0
#define SINGLE_MAXIMUM_EXPONENT 255
#define SINGLE_MINIMUM_EXPONENT 0
//
// Define single and double exponent bias values.
//
#define SINGLE_EXPONENT_BIAS 127
#define DOUBLE_EXPONENT_BIAS 1023
//
// Define the largest single and double values;
//
#define DOUBLE_MAXIMUM_VALUE 0x7fefffffffffffff
#define DOUBLE_MAXIMUM_VALUE_LOW 0xffffffff
#define DOUBLE_MAXIMUM_VALUE_HIGH 0x7fefffff
#define SINGLE_MAXIMUM_VALUE 0x7f7fffff
//
// Define single and double quite and signaling Nan values.
//
#define DOUBLE_NAN_LOW 0xffffffff
#define DOUBLE_QUIET_NAN 0x7ff7ffff
#define DOUBLE_SIGNAL_NAN 0x7fffffff
#define SINGLE_QUIET_NAN 0x7fbfffff
#define SINGLE_SIGNAL_NAN 0x7fffffff
#define DOUBLE_INTEGER_NAN 0x7fffffffffffffff
#define SINGLE_INTEGER_NAN 0x7fffffff
//
// Define positive single and double infinity values.
//
#define DOUBLE_INFINITY_VALUE 0x7ff0000000000000
#define DOUBLE_INFINITY_VALUE_LOW 0x0
#define DOUBLE_INFINITY_VALUE_HIGH 0x7ff00000
#define SINGLE_INFINITY_VALUE 0x7f800000
//
// Define rounding modes.
//
#define ROUND_TO_NEAREST 0 // round to nearest representable value
#define ROUND_TO_ZERO 1 // round toward zero
#define ROUND_TO_PLUS_INFINITY 2 // round toward plus infinity
#define ROUND_TO_MINUS_INFINITY 3 // round toward minus infinity
#endif // MIPSINST
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