#ifndef VM_H
#define VM_H
#include "vmas.h"
#include <stdint.h>

#define MOVI_SIZE 4
#define MOVR_SIZE 2
#define GETM_SIZE 4
#define PUTM_SIZE 4
#define ADDI_SIZE 4
enum regs { R0, R1, R2, R3, S0, S1, S2, S3, IP, BP, SP };

/*
MEMORY LOCATIONS AND IMMEDIATES ARE 16 BITS LONG
*/
enum ins {
  MOVI,
  MOVR,
  GETM,
  PUTM,
  ADDI,
  ADDR,
  SUBI,
  SUBR,
  XORI,
  XORR,
  NOTI,
  NOTR,
  MULI,
  MULR,
  DIVI,
  DIVR,
  PUSH,
  POOP,
  CALL,
  HALT,
  NOPE
};

class VM {
private:
  uint16_t regs[0xb];
  struct flags {
    uint8_t zf : 1;
    uint8_t cf : 1;
  };
  VMAddrSpace as;

  /*
  DBG UTILS
  */
  uint8_t *reg_name(uint8_t);
  /*
  IMPLEMENTATIONS
  */
  void exec_movi(void);
  void exec_movr(void);
  void exec_movm(void);
  void exec_getm(void);
  void exec_putm(void);
  void exec_addi(void);

public:
  VM();
  VM(uint8_t *code, uint32_t codesize);
  void init_regs(void);
  void status(void);
  void run();
};

#endif