* WideDivide returns the quotient and WideWideDivide returns a pointer to the quotient. With WideWideDivide, you pass in a pointer to the dividend, and the quotient replaces the dividend when the function returns.
* WideCompare returns a value > 0 if parameter A is greater than parameter B, a value < 0 if parameter B is greater than parameter A, and 0 if the two are equal.
* WideBitShift is a raw, logical bit shift. Performing a shift of one bit to the right
(decreasing) on a wide value of three returns a one with WideBitShift.
* WideShift rounds the result by adding half and truncating the decimal. Performing a shift of one bit to the right (decreasing) on a wide value of three returns two with WideShift. The actual value of the shift is 3/2 or 1.5, and the rounding done with WideShift rounds it up. The shift is to the right if the shift parameter is greater than 0, and to the left if < 0.
These functions aren't needed in the 68K environment, since the 'comp' data
type can be used instead. Comps have 64 bits of precision and are taken care of
automatically by SANE on the 68K environment. See page A-4 of the PowerPC
numerics manual for a bit more information about the comp data type and its
substitutions on the PowerPC. In general, the wide type and its operations
should be used as a replacement.