ppc_8xx-gcc 2.95.3 Monta Vista does not do ANY loop unrolling
fray at mvista.com
Wed Nov 13 06:56:46 EST 2002
From one of our compiler guys in relationship to your original question:
> Later Alan Cox pointed out that my changes makes x86 run slower and it turns
> out that on x86 and a fairly new gcc will automatically unroll loops 'where
Fairly new: 3.3-pre only.
Now I wonder:
> Is this a gcc 2.95.3, PPC or Monta Vista limitation?
> Which compiler will do unrolling 'where appropriate' for 8xx PPC and
> Where can I get a precompiled version?
Nowhere, nor is using it for your kernels necessarily a good idea if
you don't have compiler experience.
> I know Dan is handling the enet stuff, but since you both work
Dan no longer works for MontaVista. (And has not for some time now.)
> for MV(don't you?) I figured you might know, being an insider and all :-)
> Maybe your tweak stuff could make use of forced unrolling?
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