题解 | #多位信号xnor#

`timescale 1ns/1ns

module top_module(
    input a, b, c, d, e,
	output [24:0] out
);
    wire [24:0]t1,t2;//注意这里一定要标明位数
    assign t1 = {{5{a}},{5{b}},{5{c}},{5{d}},{5{e}}};//位拼接运算符这一定要把5{a}放在{}这里面
    assign t2 = {5{a,b,c,d,e}};
    assign out = ~t1 ^ t2;//同或可以完成相同为一的功能，也可以写成~(t1 ^ t2);也可用循环完成
endmodule

/*循环完成
    `timescale 1ns/1ns
    module top_module(
        input a, b, c, d, e,
        output [24:0] out
    );
    wire [24:0] tmp0,tmp1;
    assign tmp0[24:0] = {{5{a}},{5{b}},{5{c}},{5{d}},{5{e}}};
    assign tmp1[24:0] = {5{a,b,c,d,e}};
    genvar i;
    generate
        for(i = 0;i < 25;i = i + 1) begin
          assign out[i] = (tmp0[i] == tmp1[i]);
        end
    endgenerate
    endmodule
*/