code: def instruction_TFR(self, opcode, m):
          
          high, low = divmod(m, 16)
          dst_reg = self._get_register_obj(low)
          src_reg = self._get_register_obj(high)
          src_value = convert_differend_width(src_reg, dst_reg)
          dst_reg.set(src_value)
docs: source code forms: TFR R1, R2
          CC bits "HNZVC": ccccc