code: def _UXT(cpu, dest, src, src_width):
          
          val = GetNBits(src.read(), src_width)
          word = Operators.ZEXTEND(val, cpu.address_bit_size)
          dest.write(word)
docs: Helper for UXT* family of instructions.
  
          :param ARMv7Operand dest: the destination register; register
          :param ARMv7Operand dest: the source register; register
          :param int src_width: bits to consider of the src operand