Now that we are officially in the 64-bit era, I have a question: how
much will existing binaries, that do mainly 64 bit floating point
number crunching, benefit from the new cpu without recompiling? I'm
running VASP, a DFT code, which is mainly double precision floating
point crunching. On current G4s, each 64 bit calculation has to be
'split up' into two calculations. And I have no idea when Absoft will
release a ppc970-aware compiler. So, if I go out and buy a G5 in
august, will these binaries still split 64-bit calculations into two,
or will they do them in one step, automatically getting a speedup
factor of two? Or to put it in other words: is the 'splitting-up'
cooked into the binary (meaning no benefit from 64 bit), or is it
done by the the cpu itself as needed (meaning immediate G5 benefit
compared to G4)?
Or am I, as someone not too good with this stuff, overlooking
something else completely?
kind greets,
Peter
--
+++++++++++++++++++++++++++++++++++++++
The requirements said: Windows 2000 or better.
So I got a Macintosh.
Peter Klaver
private:
Noordeinde 28
2311 CE Leiden
071-5137357
at work:
Delft University of Technology
e-mail email@hidden
room 222, 015-2789518
Rotterdamse Weg 137
2628 AL Delft
the Netherlands
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