题解 | #4位数值比较器电路#

`timescale 1ns/1ns

module comparator_4(
	input		[3:0]       A   	,
	input	   [3:0]		B   	,
 
 	output	 wire		Y2    , //A>B
	output   wire        Y1    , //A=B
    output   wire        Y0      //A<B
);

	assign Y2 = A[3] & (!B[3]) | (~(A[3] ^ B[3])) & ((A[2] & (!B[2])) | ((~(A[2] ^ B[2]))) & ((A[1] & (!B[1])) | ((~(A[1] ^ B[1])) & (A[0] & (!B[0])))));
	assign Y1 = (~(A[3] ^ B[3])) & (~(A[2] ^ B[2])) & (~(A[1] ^ B[1])) & (~(A[0] ^ B[0]));

	assign Y0 = B[3] & (!A[3]) | (~(B[3] ^ A[3])) & ((B[2] & (!A[2])) | ((~(B[2] ^ A[2]))) & ((B[1] & (!A[1])) | ((~(B[1] ^ A[1])) & (B[0] & (!A[0])))));
endmodule