opcode = (result, first, second, size, code, name, text) => {
  const definition = {
    result,
    first,
    second,
    size,
    code,
    name,
    text
  };

  def[name] = definition;
  opcodeMap[code] = definition;
  textMap[text] = definition;

  return definition;
}
Convert Opcode definiton to usable object(s)