[m-dev.] x86-64 architecture support

[Peter Schachte]

On Sat, Aug 27, 2005 at 09:41:42AM +1000, Zoltan Somogyi wrote:
> On 26-Aug-2005, Peter Hawkins <peter at hawkins.emu.id.au> wrote:
> > It seems the 64-bit version is somewhat slower, despite having an extra 
> > global register variable.
> 
> But the data has become twice as big. This has the same effect as
> cutting the cache size in half.

But wouldn't this argument suggest that everything data cache-bound
would be markedly slower using 64 bit code?  I understand the typical
experience is that the athlon 64 runs around 30% faster when compiled
for 64 bit code.

-- 
Peter Schachte              We women say "we love you men, we really love you,
schachte at cs.mu.OZ.AU        but we say to you move over," and if we take the
www.cs.mu.oz.au/~schachte/  world and we make it any worse than you have, then
Phone: +61 3 8344 1338      we will give it back. -- Betty Williams 
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