#include "../../../vm/vm.h"
#include <stdio.h>
#include <string.h>

#define CODE_SIZE 8192
#define MEMORY_SIZE 65536
u8 lmem[MEMORY_SIZE] = {0};
u32 lcode[CODE_SIZE] = {0};

bool init_vm() {
  mem = lmem;
  memset(mem, 0, MEMORY_SIZE*sizeof(u8));
  code = lcode;
  mp = 0;
  cp = 0;
  pc = 0;
  interrupt = 0;
  return true;
}

u32 syscall(u32 id, u32 args, u32 mem_ptr) {
  USED(args);
  switch(id) {
  case SYSCALL_DBG_PRINT: {
    printf("%d\n", mem[mem_ptr]);
    return 0;
  }
  }

  return 1; // generic error
}

i32 main() {
  init_vm();

  // hardcoded add 2 numbers and print debug
  int a = mp; mp+=4;
  int b = mp; mp+=4;
  int c = mp; mp+=4;
  code[cp++] = ENCODE_B(OP_LOAD_IMM, a, 1);
  code[cp++] = ENCODE_B(OP_LOAD_IMM, b, 2);
  code[cp++] = ENCODE_A(OP_ADD_INT, c, b, a);
  code[cp++] = ENCODE_A(OP_SYSCALL, SYSCALL_DBG_PRINT, 1, c);
  code[cp++] = ENCODE_A(OP_HALT, 0, 0, 0);

  while(step_vm()) {
    // do stuff
  }
  return 0;
}