Does anyone know of a good library or libraries which will allow me to perform arithmetic operations on 1) binary integers (signed and unsigned) of various fixed sizes? 2) IEEE 754 floating point numbers (single and double precision). Pure Haskell is preferable, but I'll make do with C bindings. I need to do constant folding for integral and floating point types for a compiler front-end, and I'm hoping that I don't have to write this stuff myself.... Why not just use Float and Double for 2) you ask? Because I need to to EXACTLY IEEE 754 computation, and the Haskell report is pretty dodgy about what implementations are required to provide. Thanks Rob Dockins Speak softly and drive a Sherman tank. Laugh hard; it's a long way to the bank. -- TMBG