题解 | #求两个数的差值#

`timescale 1ns/1ns
module data_minus(
	input clk,
	input rst_n,
	input [7:0]a,
	input [7:0]b,

	output  reg [8:0]c
);
always@(posedge clk or negedge rst_n )begin
	if(!rst_n)begin
		c <= 0; 
	end
	else begin
		c <= a>b ? a-b : b-a;
	end

end
endmodule