Agnostic multiplier

[desmonddak]

Description & Motivation

Adds an optional Logic signal to integer multiplier to configure for signed or unsigned operands at runtime. This uses
the 1-bit wider unsigned footprint of the PartialProductArray, as well as modifies the sign extension. The signed configuration is disabled when this signal is configured.

Related Issue(s)

Issue 121: Sign agnostic multiplier

Testing

Random test added that generates signed and unsigned operands for multiplication.

Backwards-compatibility

Is this a breaking change that will not be backwards-compatible? If yes, how so?

No. If you use a signed configuration flag, you cannot use this feature, you must disable that configuration and pass in a Logic during construction which allows runtime control. Otherwise, you can continue to hard-configure signed or unsigned operations.

Documentation

Does the change require any updates to documentation? If so, where? Are they included?

Yes. The new operand is documented in the source and a checkbox added to the configurator.