Re: [sv-bc] another signing question

Yes, this is an example of overflow.  When assigning a large positive
value to a smaller signed variable, the overflow can result in the
value being negative.

If you want to avoid overflow from multiplication, the storage for the
result must be at least as wide as the sum of the original widths of the
factors.  If the factors are unsigned and the result is signed, then the
result will need an additional bit to avoid overflow into the sign bit.

Steven Sharp
sharp@cadence.com