An arithmetic circuit has two select lines S1 and S2 and does the following arithmetic operations using a full adder:
Determine the simplified Boolean functions for Xi and Yi for a single stage of the circuit given inputs A & B are n-bit registers.
The Attempt at a Solution
All I want to know is how to turn the given function table into a truth table so I can construct the logic diagram. Is the Carry-in part of the table? If so, that would make this question a 5x5, which is something we've never done (columns for S1, S0, Ai, Bi, Cin). This stuff is so confusing - sorry that I can't articulate better.
Other questions: Looking at my notes for a similar exercise, Xi is often Ai. Why? Where do these variables come from??