| 摘要 |
Ordinary minterm counting (OMC) and weighted minterm counting (WMC) are applied as combinational design discriminators to a pair of combinational designs D1 and D2. OMC assigns the same weight to each minterm, while WMC assigns a weight that can vary. For application of minterm counting, D1 and D2 can be converted into BDDs. The size of the BDDs can be reduced by assigning binary values to some of the input variables. If the minterm counts of D1 and are within a certain tolerance, then D1 and D2 cannot be distinguished. Even if D1 and D2 are determined to represent different functionalities, they may still be sufficiently related such that classification of them as differing functionalities is inappropriate. Each such test of relatedness, between a pair of designs D1 and D2, can be referred to as an "exception." Minterm counting can also be applied when don't cares are part of a design specification. Exceptions can apply to such minterm counts.
|
