{RFA] PowerPC e500mc64 core support

[Edmar Wienskoski-RA8797]

David,

We've reviewed our goals and revised the patches with your
comments in mind. We think that this version should address
your concerns and welcome your feedback if this is not the case.

I am still using the same subversion revision 153598 from 2009-10-27

I re-run the regressions tests for both e500mc and 970 targets under 
these conditions:
--enable-checking --disable-decimal-float --enable-languages=c,c++,fortran

Please let us know if you see any further concerns prior to applying.

Regards,
Edmar


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