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[3] == B[3]) && (A[2] == B[2]) && (A[1] >  B[1])
		 || (A[3] == B[3]) && (A[2] == B[2]) && (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 = (A[3] <  B[3])
		 || (A[3] == B[3]) && (A[2] <  B[2])
		 || (A[3] == B[3]) && (A[2] == B[2]) && (A[1] <  B[1])
		 || (A[3] == B[3]) && (A[2] == B[2]) && (A[1] == B[1]) && (A[0] < B[0]);
endmodule