(ALUDesign) Implement to the gate level an ALU bit slice with three operation selection inputs, S2, S1, S0, that implements the following eight functions of the two data inputs, A and B (and carry-in Cn):
S2 | S1 | S0 | ALU Operation |
0 | 0 | 0 | Fi = 0 |
0 | 0 | 1 | Fi = B minus A |
0 | 1 | 0 | Fi = A minus B |
0 | 1 | 1 | Fi = A plus B |
1 | 0 | 0 | Fi = A XOR B |
1 | 0 | 1 | Fi = A OR B |
1 | 1 | 0 | Fi = A AND B |
1 | 1 | 1 | Fi = 1 |
Assume a simple ripple–carry scheme between bit slices.
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