14. Draw a schematic that uses the LPM_ADD_SUB megafunction to add two signed numbers on the Cyclone device. Use Tools D Megawizard to start the megawizard to help configure LPM symbols. Verify the proper operation using a simulation with two 4-

bit numbers. Do not use pipelining, clock, or carry in. Vary the number of bits in the adder and find the maximum delay time using the timing analyzer. Plot delay time versus number of bits for adder sizes of 4, 8, 16, 32, and 64 bits. Using the LC percentages listed in the compiler’s report file, estimate the hardware size in LEs. Plot LEs required versus number of bits.