The ALU's operations are governed by four function inputs (S3 to S0), which direct the 8-bit 2-to-1 multiplexers both internally and externally within the logic blocks. It is required to implement the ALU both in behavioral and structure methods and compare the results of the two designs. The operations performed by the ALU, based on the select inputs, are detailed in Table 1.

table 1 operations of ALU

both designs simulation results

test bench cases results

behavioral design block diagram using quartus prime

structural design block diagram using quartus prime