#ifndef _CPU_H
#define _CPU_H

#include <stdint.h>
#include <stdbool.h>

/* cpu traps */
enum {
	TRP_UNALIGNED,
	TRP_DIVBYZERO,
	TRP_SYSCALL,
	TRP_ILL,
};

void trap(int num);

/* program counter */
extern uint32_t PC;

/* status bits */
extern bool N, Z;

/* 32 general purpose registers */
extern uint32_t GPR[32];

/* main cpu execution function */
void execute(uint32_t IR);

#endif