题解 | #4位数值比较器电路#
4位数值比较器电路
http://www.nowcoder.com/practice/e02fde10f1914527b6b6871b97aef86d
`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
