Final answer:
Here is an example of the Verilog code for a 6-bit comparator using 2-bit comparators and extra logic, along with a Test Bench code to test its functionality.
Step-by-step explanation:
Here is an example of the Verilog code for a 6-bit comparator using 2-bit comparators and extra logic:
module comparator_6bit(input [5:0] a, input [5:0] b, output less, output equal, output greater);
wire less_4_5, equal_4_5, greater_4_5;
wire less_0_3, equal_0_3, greater_0_3;
wire less_2_3, equal_2_3, greater_2_3;
wire equal_0_1, greater_0_1;
comparator_2bit u1(a[4:3], b[4:3], less_4_5, equal_4_5, greater_4_5);
comparator_2bit u2(a[2:1], b[2:1], less_0_3, equal_0_3, greater_0_3);
comparator_2bit u3(a[1:0], b[1:0], less_2_3, equal_2_3, greater_2_3);
comparator_2bit u4(a[0], b[0], less_0_1, equal_0_1, greater_0_1);
assign less = (less_4_5 | (equal_4_5 & less_0_3) | (equal_4_5 & equal_0_3 & less_2_3) | (equal_4_5 & equal_0_3 & equal_2_3 & less_0_1));
assign equal = (equal_4_5 & equal_0_3 & equal_2_3 & equal_0_1);
assign greater = (!less & !equal);
endmodule
And here is an example of a Test Bench code that can be used to test the functionality of the 6-bit comparator:
module testbench;
reg [5:0] a, b;
wire less, equal, greater;
comparator_6bit u1(a, b, less, equal, greater);
initial
begin
a = 6'b101010;
b = 6'b011110;
#10;
$display("a < b: %b", less);
$display("a = b: %b", equal);
$display("a > b: %b", greater);
$finish;
end
endmodule
To verify the functionality of the code, you can use an Verilog simulator such as EdPlayground by copying and pasting the code into the editor and running the simulation. The expected output for the provided test values should be:
a < b: 0
a = b: 0
a > b: 1