Not designed for performance. Uses CLP(FD) for bit manipulation. and hence remains within the integer domain. Float arithmetic applies outside the finite-domain constraints.

Arguments:

Word	- is a non-negative integer. This implementation does not handle negative integers. Negative support implies a non-determinate solution for packing. A positive and negative answer exists for any given Float.
Sig	- is the floating-point significand between plus and minus 1. Uses Sig rather than Mantissa; Sig short for Significand, another word for mantissa.