[rs6000 PATCH] Implement ppu_intrinsics.h

[Andrew_Pinski@PlayStation.Sony.Com]

Hi,
 The C/C++ Language Extensions for the Cell BEA [1] specifies a 
ppu_intriniscs.h for the PowerPC side of the Cell.  This adds an 
implementation using inline-asm for now (in the future I will add builtins 
for the intrinsics).  This ppu_intrinsics.h has been updated for even the 
latest RFC which is not included in a published document yet (just adds 
the __protected_* intrinsics).  This patch also adds a testcase for 
testing that the header file works and some of the intrinisics compile.  I 
have not yet added a full testcase over all the intrinsics.  The header 
file also includes the work around needed to compile with glibc's mah.h 
defining __fabs and __fabsf (both of which are not exported from glibc).

OK? Bootstrapped and tested on powerpc64-linux-gnu with no regressions.

This header was written orginally by Nobuhisa Fujinami, and then modified 
by me and Alex Rosenberg and then changed a little more by Ben Elliston 
and Ulrich Weigand (both at IBM).

Thanks,
Andrew Pinski

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