From the site:
This site is an adjunct to the book Hacker’s Delight (Addison-Wesley, 2003). It may become a forum for discussions about the kind of algorithms that are in that book. There is no mechanism set up yet for discussion threads, but if you send me email (see the bottom of this page) I’ll post it if it seems appropriate. Please also send email if you find errors in the book.
Try this link for the example code: http://www.hackersdelight.org/HDcode.htm