#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);

/* stack pointer */
extern uint32_t SP;

/* base pointer */
extern uint32_t BP;

/* return value */
extern uint32_t RV;

/* instruction pointer */
extern uint32_t IP;

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

/* general purpose registers */
extern uint32_t *GPR;

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

#endif