Abstract
An input transformation based on EXOR gates is presented which enables efficient two-level AND/EXOR representations of adders to be constructed. In general, adders only have exponential two-level representations, but by using the input transformation the complexity decreases to O(n2) requiring only a linear hardware overhead. Exclusive sum-of-products (ESOP) and positive polarity Reed-Muller expression (PPRM) circuits are considered.
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