[Haskell-cafe] Looking for largest power of 2 <= Integer

[Simon Peyton-Jones]

| (2) Is it safe to assume an underlying implementation based on GMP?
| (In Num.lhs there is an alternative definition for .NET. Is that ever
| used?) Is it safe to assume the size of a GMP "limb" is the same as
| the word size? (I'm assuming it is for now.)

I think it's safe for now.  In principle the impl of Integer could be anything, and various people would like it to be something other than gmp for licensing reasons. But as of today, it's always gmp.

Simon