eugene.leitl at lrz.uni-muenchen.de
Thu Sep 21 11:09:38 PDT 2000
Erich Strohmaier writes:
> In practice however it seems to me to be much harder to utilizes the SIMD
> units on current micro-processors than to use the "normal" FPU.
This is true, but still for people who can talk assembly very
substantial speedups are possible:
(I'm not sure whether it's in there, but Yann Guidon did use MMX
acceleration for his lattice gas CFD).
> On traditional vector systems (Cray and such) you have full support of the
> vector units by vectorizing compilers. I am not aware of anything
> close to this on micros. Quoting SIMD flops on a wide basis would raise a
There seems to be SWARC Scc by Hank Dietz
which attemts to wrap the hardware in C extension abstraction but it
doesn't seem to be developed further. Too bad, I could use it.
> lot of expectations and cause a lot of disappointments. Rather than
> inflating "Macho-flops" I would rather be more realistic in my
> Even besides this argument, I will have to swith to a CONSISTENT way of
> representation regardless what it is. Quoting one system with SIMD and the
> next one without does not make sense.
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