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 <= 'd0;
	end
	else if(a>b)begin
		c <= a-b;
	end
	else begin
		c <= b-a;
	end

end

endmodule