5位的操作数X和Y输入后暂存在寄存器A和B中，两位的操作控制码control暂存在寄存器C中，按照control码的不同，分布实现下列操作：

00控制X+Y

01控制X-Y

10控制X and Y

11控制 X xor Y

运算结果暂存在寄存器D中，然后输出。

-5 of the operand X and Y after the temporary importation of A and B in the register, the two operational control code register C in temporary control, in accordance with the control code is different from the distribution of the realization of the following steps: 00 control X+ Y01 control of X- Y10 control X and Y11 control X xor Y computing the results of temporary storage in the register D, and then output.