module safe_div8 (
input [7:0] dividend,
input [7:0] divisor,
output [7:0] q,
output [7:0] r,
output div_by_zero
);
// TODO: implement with ternary (?:)
assign div_by_zero=(divisor==8'd0);
assign q=div_by_zero?8'd0:(dividend / divisor);
assign r=div_by_zero?8'd0:(dividend % divisor);
endmodule