Optimise comparison of ScaledDecimals #1120
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As per #1119, adds
equalToScaledDecimal:double-dispatch handler in various ArithmeticValue subclasses.To optimise SmallInteger=ScaledDecimal comparisons I initially added an implementation of
=to Integer (implemented as per the primitive fallback code inLargeInteger>>#=) however this had a negative effect on SmallInteger=Float comparisons. Instead the performance of SmallInteger=ScaledDecimal comparisons has been improved by optimising Integer-ScaledDecimal subtractions - seeScaledDecimal>>#subtractFromInteger:. ScaledDecimal creation has also been optimised slightly by use of primitive 157.Resolves #1119.