题解 | #使用函数实现数据大小端转换#

`timescale 1ns/1ns
module function_mod(
	input clk,
	input rst_n,
	input [3:0]a,
	input [3:0]b,
	
	output [3:0]c,
	output [3:0]d
);
    function [3:0] rev;
        input [3:0] x;
        reg [3:0] rev;
        begin
            rev[0] = x[3];
            rev[1] = x[2];
            rev[2] = x[1];
            rev[3] = x[0];
        end
    endfunction
        
    assign c = rst_n ? rev(a) : 4'b0;
    assign d = rst_n ? rev(b) : 4'b0;
endmodule