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
);

// reg [3:0] c_reg;
// reg [3:0] d_reg;

assign c = data_rsv(a);
assign d = data_rsv(b);

// always@(posedge clk or negedge rst_n)begin
// 	if(!rst_n)begin
// 		c_reg<=0;
// 		d_reg<=0;
// 	end
// 	else begin
// 		c_reg<=data_rsv(a);
// 		d_reg<=data_rsv(b);
// 	end
// end

function [3:0] data_rsv;
	input [3:0] data_in;
	integer i;
	begin
		for(i=0;i<=3;i=i+1)begin
			data_rsv[i]=data_in[3-i];
		end
	end
endfunction

endmodule