> Stef, thanks for looking at the overflow arithmetic.  In 64-bits we may 
> not need it at all, and so I could add an ifTrue:ifFalse: based on the 
> value of SmallInteger maxVal that would avoid the complex arithmetic on 
> 64-bits.  What do you think?

Well my analysis of the problem was way off, as Levente showed, so I 
will pass on this one:)

Stef