. 3. Write a Verilog description for a four-bit carry- Co...

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3. Write a Verilog description for a four-bit carry- Co lookahead adder (CLA). The PG units produces Gi = aibi and Pi = ai @ bi. The outputs are si = Pi O ci and ao Po So = POD Co PG So cit1 = Gi + Pici. You can choose any levels of bo Go C1 = Go + Poco abstraction for describing your design. Using the C1 same set of testvectors in Assignment 1-Question1, P So = PIC1 PG GI C2 = G + PIC S1 compare the outputs of your CLA with the outputs bi of your RCA in one testbench. az P. S2 = P2 C2 PG S2 b2 GZ C3 = G2 + P2 C2 C3 a3 P3 S3 = P3 D C3 PG 53 b3 G3 C4 = G3 + P3 C3 C out

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