Implement the "unum" representation in D ?

[w0rp]

This is very interesting, thank you for sharing this. My 
knowledge of assembly, compilers, and how machines actually work 
is limited, but I knew enough about the details of floating point 
to get the gist of it. The diagrams in the PDF also helped. I 
hope someone does more research on this, as it looks promising 
for improving the quality of calculations.