shell.h

/***************************************************************/
/*                                                             */
/*   MIPS Instruction Level Simulator                          */
/*                                                             */
/* This file is modifed from UChicago's Comp Arch course       */
/*                                                             */
/***************************************************************/

/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
/*          DO NOT MODIFY THIS FILE!                            */
/*          You should only change sim.c!                       */
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */

#ifndef _SIM_SHELL_H_
#define _SIM_SHELL_H_

#include <inttypes.h>
#define FALSE 0
#define TRUE  1

#define MIPS_REGS 32

typedef struct CPU_State_Struct {
  uint32_t PC;		/* program counter */
  int32_t REGS[MIPS_REGS]; /* register file. */
  int FLAG_N;        /* negative flag or sign flag*/
  int FLAG_Z;        /* zero flag */
  int FLAG_V;        /* overflow flag */
  int FLAG_C;        /* carry flag */
} CPU_State;

/* Data Structure for Latch */

extern CPU_State CURRENT_STATE, NEXT_STATE;

extern int RUN_BIT;	/* run bit */

uint32_t mem_read_32(uint32_t address);
void     mem_write_32(uint32_t address, uint32_t value);

/* YOU IMPLEMENT THIS FUNCTION */
void process_instruction();

#endif