Re: Fast DES IP implementation

From: Phil Carmody (thefatphil_demunged_at_yahoo.co.uk)
Date: 12/09/04 

Date: 09 Dec 2004 11:37:35 +0200

"Douglas A. Gwyn" <DAGwyn@null.net> writes:
> There is a related XOR trick sometimes used to
> traverse a linked list in either forward or
> reverse direction with only a single link field
> in each node, with one extra field of information
> for the whole list needed to get started (that
> can be stored in a list header). If you aren't
> familiar with this trick, it is a nice little
> exercise to figure it out.

Now that (as far as I know) _is_ Knuth's.

Phil 

-- 
God was my co-pilot but we crashed in the mountains and I had to eat him.