[RC5] AMD X86-64 port

Scott Dodson sdodson at eagle4.cc.gasou.edu
Sun Apr 27 15:35:01 EDT 2003

On Sun, 2003-04-27 at 14:13, Karl wrote:
> > One of the core guys (Acidblood) is raving about the new chip.  I'm
> > pretty sure he thinks it's the best thing since sliced bread.  So
> > there's definitely interest internally.
> > 
> I'm most interested to see what those extra registers in 64-bit mode can do
> for RC5-72 performance.

Acidblood has said that the simple fact of being 64-bit won't help, and
I think he even said it would harm it.  The operations of rc5 are
particularly friendly to 32bit processors, I believe he mentioned the
modulo operations work really well on 32bit processors.  But of course,
if the new Opteron is overall a faster processor, it should surely go
faster.  The fact that it runs 32bit code pretty well should be
interesting too.

sdodson at distributed.net
sdodson at eagle4.cc.gasou.edu
To unsubscribe, send 'unsubscribe rc5' to majordomo at lists.distributed.net
rc5-digest subscribers replace rc5 with rc5-digest

More information about the rc5 mailing list