To clarify a bit:
> The floor function works fine over large numbers. The problem is
> that the large number 9999....999.0 is too large to stored as
> a Double, so is stored as Inf.0.
>
> Main> 999999999999999999999999999999999999999.0
> Inf.0 :: Double
>
> Now what floor does with Inf is undefined (see page 82 of the
> H98 report).
Standard Hugs represents both Double and Float using an IEEE754
32-bit (short) float, unfortunately, so you can expect over/under
flows at around 1e+/-38.
One option is to use STG Hugs instead. It really represents Doubles
as C doubles, so your range is more like 1e+/-300.
J
