Abstract
In this paper, we investigate how to use the complete flexibility of P-circuits, which realize a Boolean function by projecting it onto overlapping subsets given by a generalized Shannon decomposition. It is known how to compute the complete flexibility of P-circuits, but the algorithms proposed so far for its exploitation do not guarantee to find the best implementation, because they cast the problem as the minimization of an incompletely specified function. Instead, here we show that to explore all solutions we must set up the problem as the minimization of a Boolean relation, because there are don't care conditions that cannot be expressed by single cubes. In the experiments we report major improvements with respect to the previously published results.
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