typo in unboxed types section + feature request

[Simon Marlow]

> First off, in section 7.2.7 "Primitive-Double and Float
> operations" there's a typo.  It says "minux" instead of "minux" on the
> line reading: "{plus,minux,times,divide}Float# :: ...".
> 
> For the feature request, could we get the rest of the trig functions,
> namely:
> 
>   asinhFloat#, acoshFloat#, atanhFloat# and the Double# versions
> 
> as well as the corresponding function to the
> 
>   isInfinite :: (RealFloat a) => a -> Bool
> 
> function on Float# and Double#?  I suggest the following names:
> 
>   isInfiniteFloat#, isInfiniteDouble#
> 
> :)

You can use the FFI for all these operations, just import the C
versions.  You can even use unboxed types if you really want (mostly it
shouldn't be necessary, though).

For isInfinite, just use:

foreign import ccall unsafe "isDoubleInfinite" 
  isDoubleInfinite# :: Double# -> Int#

and similarly for Float#.

Cheers,
	Simon