![](https://csdnimg.cn/release/download_crawler_static/86390989/bg9.jpg)
begin
aluRes = input1 - input2;
if(aluRes == 0)
zero = 1;
else
zero = 0;
end
4'b0010: // 加
aluRes = input1 + input2;
4'b0000: // 与
aluRes = input1 & input2;
4'b0001: // 或
aluRes = input1 | input2;
4'b1100: // 异或
aluRes = ~(input1 | input2);
4'b0111: // 小于设置
begin
if(input1<input2)
aluRes = 1;
end
default:
aluRes = 0;
endcase