Native compilation article

Bryce McKinlay bryce@waitaki.otago.ac.nz
Fri Jan 25 13:44:00 GMT 2002


Anthony Green wrote:

>On Fri, 2002-01-25 at 12:08, Bryce McKinlay wrote:
>
>>They used GCC 3.0 for their testing. The current cvs GCJ beats IBM and 
>>Sun on Scimark, and is in fact much faster if we cheat with 
>>--no-bounds-check.
>>
>
>We should look at not including -ffloat-store in the specs file.  This
>is a throw-back to the old fp rules (and it didn't even always work).
>
>It would also be interesting to see the difference on something like a 
>P4 with -mfpmath=sse (or whatever it's called these days).  
>

-ffast-math is another good one now that Tom's math inlining is in. With 
that it will generate x86 FPU instructions for some of the Math.* stuff 
rather than math library calls.

regards

Bryce.




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