Subject: Re: Port benchmarks
To: Manuel Bouyer <>
From: Andrew Gallatin <>
List: port-alpha
Date: 04/04/2000 16:40:16
Manuel Bouyer writes:
 > > 
 > > I just had a peek at our bcopy - there's appears to be no loop unrolling
 > > at all (look at the bcopy_samealign_lp).  What's the typically loop
 > > overhead on an alpha CPU?
 > I don't know, but I would expect that a tuned bcopy would improve things ...
 > unfortunably I don't know alpha assembly.

Somebody might want to take a look at Appendix B of the Compiler
Writer's Guide for the 21264

They present how to optimize a checksumming routine.  I imagine most
of this could be transferrable to optimizing bcopy.



Andrew Gallatin, Sr Systems Programmer
Duke University				Email:
Department of Computer Science		Phone: (919) 660-6590