cAllegrexDefs.h

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#ifndef CALLEGREXDEFS_H_
#define CALLEGREXDEFS_H_

#include <inttypes.h>
#include "general_emu.h"

/* REGISTROS */

typedef uint32_t tRegistro;


union tRegistroInst
{
        uint32_t valor;

        struct
        {
                unsigned                : 26;
                unsigned opcode : 6;
        } generico;

        struct
        {
                unsigned func   : 6;
                unsigned sa             : 5;
                unsigned rD             : 5;
                unsigned rT             : 5;
                unsigned rS             : 5;
                unsigned                : 6;
        } tipoR;

        struct
        {
                unsigned imm    :16;
                unsigned rT             : 5;
                unsigned rS             : 5;
                unsigned                : 6;
        } tipoI;

        struct
        {
                unsigned off    :26;
                unsigned tipo   : 1;
                unsigned                : 5;
        } tipoJ;

        struct
        {
                unsigned func   : 6;
                unsigned rD             : 5;
                unsigned rS             : 5;
                unsigned rT             : 5;
                unsigned fmt    : 5;
                unsigned cpN    : 2;
                unsigned                : 4;
        } tipoCP;
};

union tRegistroDoble
{
        uint64_t valor;
        struct
        {
                uint32_t lo;
                uint32_t hi;
        };
};

#define NUM_REG_GENERICOS 32


#define REG_ZR 0
#define REG_AT 1
#define REG_V0 2
#define REG_V1 3
#define REG_A0 4
#define REG_A1 5
#define REG_A2 6
#define REG_A3 7
#define REG_T0 8
#define REG_T1 9
#define REG_T2 10
#define REG_T3 11
#define REG_T4 12
#define REG_T5 13
#define REG_T6 14
#define REG_T7 15
#define REG_S0 16
#define REG_S1 17
#define REG_S2 18
#define REG_S3 19
#define REG_S4 20
#define REG_S5 21
#define REG_S6 22
#define REG_S7 23
#define REG_T8 24
#define REG_T9 25
#define REG_K0 26
#define REG_K1 27
#define REG_GP 28
#define REG_SP 29
#define REG_FP 30
#define REG_RA 31

// Valores de registros
#define REG_VALOR_DEFECTO 0
#define REG_VALOR_INICIAL_PC 0xBFC00000
#define REG_VALOR_INICIAL_SP 0x7FFFEFFC

/* PIPELINE */

#define TAM_PIPLINE 2

/* INSTRUCCIONES */

#define TAM_INSTRUCCION sizeof(tWord) // En bytes

#define NUM_OPCODES 64

#define INST_NOP 0x00000000

// Tipo R (campo func. de la instr. tipo R)
#define INST_SLL                0x00
#define INST_SRL                0x02
#define INST_SRA                0x03
#define INST_SLLV               0x04
#define INST_SRLV               0x06
#define INST_SRAV               0x07

#define INST_JR                 0x08
#define INST_JALR               0x09
#define INST_MOVZ               0x0A
#define INST_MOVNZ              0x0B
#define INST_SYSCALL            0x0C
#define INST_BREAK              0x0D
#define INST_SYNC               0x0F

#define INST_MFHI               0x10
#define INST_MTHI               0x11
#define INST_MFLO               0x12
#define INST_MTLO               0x13

#define INST_MULT               0x18
#define INST_MULTU              0x19
#define INST_DIV                0x1A
#define INST_DIVU               0x1B

#define INST_ADD                0x20
#define INST_ADDU               0x21
#define INST_SUB                0x22
#define INST_SUBU               0x23
#define INST_AND                0x24
#define INST_OR                 0x25
#define INST_XOR                0x26
#define INST_NOR                0x27

#define INST_SLT                0x2A
#define INST_SLTU               0x2B

#define INST_TGE                0x30
#define INST_TGEU               0x31
#define INST_TLT                0x32
#define INST_TLTU               0x33
#define INST_TEQ                0x34
#define INST_TNE                0x36


// Tipo REGIMM
#define INST_RIMM_BLTZ          0x00
#define INST_RIMM_BGEZ          0x01
#define INST_RIMM_BLTZL         0x02
#define INST_RIMM_BGEZL         0x03

#define INST_RIMM_TGEI          0x08
#define INST_RIMM_TGEIU         0x09
#define INST_RIMM_TLTI          0x0A
#define INST_RIMM_TLTIU         0x0B
#define INST_RIMM_TEQI          0x0C
#define INST_RIMM_TNEI          0x0E

#define INST_RIMM_BLTZAL        0x10
#define INST_RIMM_BGEZAL        0x11
#define INST_RIMM_BLTZALL       0x12
#define INST_RIMM_BGEZALL       0x13

#define INST_MASC_J 0xC0000000


#endif /* CALLEGREXINFO_H_ */