[8u-dev, ppc] RFR for (almost clean) backport of 8188868: PPC64: Support AES intrinsics on Big Endian

[Kazunori Ogata]

Hi,

May I get review for backport of 8188868: PPC64: Support AES intrinsics on 
Big Endian?

The original patch itself can be applied cleanly (besides difference of 
the source directory structure). However, one chunk failed because the 
code just after the patched code was modified, so I manually applied the 
chunk and renewed the patch.

Bug: https://bugs.openjdk.java.net/browse/JDK-8188868
Webrev: http://cr.openjdk.java.net/~ogatak/jdk8u_aes_be/8188868/webrev.02/


This backport is low risk and affects only PPC64 only. I verified there 
was no degradation in "make test" results and SPECjbb 2015 ran fine. The 
intrinsics added in this changeset improved max jOPS by 5% and critical 
jOPS by 4%. 


Regards,
Ogata