I think I used the same patch. Although the reason I used it is because the
-xP option would give a fatal error (although -axP worked fine) prior to
patching. Running the unpatched compiler with -axP would make the program
run the generic code path (equivalent to compiling with -xW).

The -xP option supposedly utilizes sse3 and other optimizations, yet the
compiled program is still slower than with the default -xW. Anyone with an
EM64T cpu want to try this out?

-John

Nicolas Calimet <pov### [at] freefr> wrote:
> > - Patched icc to allow optimized code to run on non-Intel processors
>
>  Doing some quick tests, I don't seem to get any speed difference on a K8
> (Opteron 246 @ 2 GHz) between a POV-Ray 3.6.1 binary that I used for my study*
> built with icce 8.1 and the same binary patched with Mark Mackey's perl script
> that removes the test for the "GenuineIntel" CPUID string.
>  Did you use a different patch, and could you provide benchmark results for
> an unpatched binary as well?
>
> (*) the k8-icce-8.1-ip-axW binary, for which the raw results are not reported
>
>  - NC

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