On Thu, Apr 17, 2003 at 10:53:57AM -0700, Dennis Castleman wrote:
> Anybody know the performance differences I can expect using a MIPS 5K core
> @250 Mhz in 64bit mode versus 32bit mode?
It really depends on the applications. The biggest gain from 64bit,
other than the obviously bigger address space, is 64bit data
manipulation. A single 64bit instruction (add/sub/...) is carried
out by several instructions in 32bit.
If your apps are heavy on 64bit operations, then you gain.
Otherwise I suspect no performance gain or even possibly a little
worse performance due more stress on cache/memory subsystems.
I am sure others with more 64bit experience probably have more
to say. :)