Full set of sign variants (signed/unsigned/selected) for multiplier operands

[desmonddak]

Description & Motivation

This updates the compression tree mulitplication components to fully handle variations in sign for multiplicand and multiplier.
This includes separate fixed signs for both, as well as a select signal for both and all valid combinations. When select is enabled for an operand, the fixed sign input parameter is false..

The core parameters are:

• signedMultiplicand
• signedMultiplier
• selectSignedMultiplicand
• selectSignedMultiplier

These parameters are enabled for the CompressionTreeMultiplier and CompressionTreeMultiplyAccumulate.

Major cleanup of the testing routines to ensure solid coverage and reduce testing time.

Related Issue(s)

#143

Testing

Sweep testing of the PartialProductGenerators for all combinations of signed/selected operands and all sign extension methods, across all radix settings.

Backwards-compatibility

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

Yes. The signed parameter is now split into signedMultiplicand and signedMultiplier.

Documentation

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

Yes. Documentation for the Multipliers is updated. The configurator is also updated.

[mkorbel1]

This is awesome stuff!!

[desmonddak]

Do I need to protect getters? I just realized I left protectors in place when I converted inputs declarations to getters.

[mkorbel1]

Do I need to protect getters? I just realized I left protectors in place when I converted inputs declarations to getters.

You should generally mark @protected on any variable or function that should only be accessed by sub classes which extend that class. If nothing should access them, then making them private is better.

[mkorbel1]

Looks great!! Awesome!