cellmatch: Size the lut attribute
#4625
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What are the reasons/motivation for this change?
Under an undocumented
-lut_attrsoption thecellmatchcommand can annotate output ports with alutattribute describing the port's function. Previously these attributes were 32-bit, which meant the value for 6-input cells was cropped, and one needed knowledge of the number of inputs to interpret the value. Make the change to size thelutattribute to two to the power of number of inputs.