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 Y0 = (A[3]<B[3])? 1 : (A[3]==B[3] && A[2]<B[2] )? 1 :
			(A[3]==B[3] && A[2]==B[2] && A[1]<B[1] ) ? 1 :
			(A[3]==B[3] && A[2]==B[2] && A[1]==B[1] && A[0]<B[0])?1:0;

assign Y1 = (A[3]==B[3] && A[2]==B[2] && A[1]==B[1] && A[0]==B[0])?1:0;

assign Y2 = (A[3]>B[3])? 1 : (A[3]==B[3] && A[2]>B[2] )? 1 :
			(A[3]==B[3] && A[2]==B[2] && A[1]>B[1] ) ? 1 :
			(A[3]==B[3] && A[2]==B[2] && A[1]==B[1] && A[0]>B[0])?1:0;		

endmodule