A Byte Comparator

module comp(d,a,b,en);

input en;

input[7:0]a,b;

output d;

wire [7:0]c;

wire dd;

xor g1[7:0](c,b,a);

or(dd,c);

notif1(d,dd,en);

endmodule

module comp_tb;

reg[7:0]a,b;

reg en;

comp gg(d,a,b,en);

initial

begin

a = 8'h00;

b = 8'h00;

en = 1'b0;

end

always

#2 en = 1'b1;

always

begin

 #2 a = a+1'b1;

 #2 b = b+2'd2;

end

initial $monitor($time," en = %b , a = %b ,b = %b ,d = %b ",en,a,b,d);

initial #30 $stop;

endmodule