Fixed-Point Arithmetic?

[Ashley Yakeley]

Have there been any proposals (or, indeed, does anyone have any private 
libraries) for fixed-point arithmetic? I can imagine uses for these 
64-bit types:

    * unsigned, with all bits after the decimal point
      i.e. 0 <= x < 1

    * unsigned, with 32 bits before the decimal point and 32 after

    * signed, with 32 bits before the decimal point and 32 after

-- 
Ashley Yakeley, Seattle WA