Symbolic minimization of multilevel logic and the input encoding problem
Sharad Malik, Luciano Lavagno, Robert K. Brayton, Alberto Luigi Sangiovanni-Vincentelli · IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems · 1992
Techniques for the optimization of multilevel logic with multiple-valued input variable is presented. The motivation for this is to tackle the input encoding problem in logic synthesis, where binary codes must be found for the different values that a symbolic input variable can take. It is shown how the other multilevel optimization techniques are easily extended with multiple-valued variables. These ideas have been implemented as algorithms in the program MIS-MV. The practical issues involved in the implementation of these ideas are discussed, and results of using MIS-MV for input encoding on benchmark examples presented.>