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Representations of multiple-output switching functions using multiple-valued pseudo-Kronecker decision diagrams

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2 Author(s)
Babu, H.M.H. ; Dept. of Comput. Sci. & Electron., Kyushu Inst. of Technol., Iizuka, Japan ; Sasao, T.

In this paper, we propose a method to construct smaller multiple-valued pseudo-Kronecker decision diagrams (MVPKDDs). Our method first generates a 4-valued input 2-valued multiple-output function from a given 2-valued input 2-valued output functions. Then, it constructs a 4-valued decision diagram (4-valued DD) to represent the generated 4-valued input function. Finally, it selects a good expansion among 27 different expansions for each 4-valued node of the 4-valued DD and derive a 4-valued PKDD. We present heuristics to produce compact 4-valued PKDDs. Experimental results using benchmark functions show the efficiency of our method. From experiments, we also conjecture that, for n>1, to represent an n-bit adder (adr n), a 4-valued PKDD, a 4-valued DD (MDD), a 2-valued PKDD, and a shared binary decision diagram (SBDD) require 2n+1, 3n-1, 4n-1, and 9n-7 non-terminal nodes, respectively

Published in:

Multiple-Valued Logic, 2000. (ISMVL 2000) Proceedings. 30th IEEE International Symposium on

Date of Conference:

2000