44. Bus Error Checker

How do you plan to solve it?

/*Write your code here*/
module error_checker_xz (
    input [7:0] bus,
    output all_known,has_unknown,
    output [7:0] bus_if_known
);

assign all_known = ~((^(bus ^ bus)) === 1'bx) ;
assign has_unknown = ((^(bus ^ bus)) === 1'bx);

assign bus_if_known = {8{all_known}} & bus;



endmodule