util.h

/***************************************************************/
/*                                                             */
/*   MIPS-32 Instruction Level Simulator                       */
/*                                                             */
/*   CSE561 Ajou University                                    */
/*   util.h                                                    */
/*   Adapted from CS311@KAIST                                  */
/*                                                             */
/***************************************************************/

#ifndef _UTIL_H_
#define _UTIL_H_

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

#define FALSE 0
#define TRUE  1

/* Basic Information */
#define MEM_TEXT_START  0x00400000
#define MEM_TEXT_SIZE   0x00100000
#define MEM_DATA_START  0x10000000
#define MEM_DATA_SIZE   0x00100000
#define MIPS_REGS       32
#define BYTES_PER_WORD  4
#define PIPE_STAGE      5

typedef struct IF_ID_Struct {
  instruction INSTR;

  uint32_t NPC;
} IF_ID;

typedef struct ID_EX_Struct {
  uint32_t NPC;

  uint32_t REG1;    // Register value 1
  uint32_t REG2;    // Register value 2

  char RS;
  char RD;
  char RT;
  uint32_t IMM;     // Immediate Field
  char SHAMT;
  char DEST;

  char ALUOp;
  // 1: add (ADDIU, ADDU, LW, SW)
  // 2: sub (SUBU, BEQ, BNE)
  // 3: AND (AND, ANDI)
  // 4: OR (OR, ORI, NOR)
  // 5: Shift Left (SLL)
  // 6: Shift Right (SRL)
  // 7: Set Less Than (SLTIU, SLTU)
  // 8: Shift Left 16 (LUI)
  // 9: JAL (JAL)
  char ALUSrc; // Second Operand from Immediate -> 1
  char ALUNeg; // NOR or BNE -> 1

  char Branch; // branch -> 1
  char MemRead;
  char MemWrite;

  char RegWrite;
  char MemtoReg;
  char LoadUse;