The following waveforms show the behavior of altmult_add megafunction for the chosen set of parameters in design cmpl_mult_imm_18x18.v. The design cmpl_mult_imm_18x18.v has 2 18 X 18 multiplier(s) producing an output of 36 bits. The A input to the multiplier is SIGNED. The B input to the multiplier is SIGNED. ADD operation is performed on the output of the first pair of multipliers.