RFR(m) 8164920: ppc: enhancement of CRC32 intrinsic

[Hiroshi H Horii]

Dear Vladimir and all:

Can I please request reviews for the following change?

JIRA: https://bugs.openjdk.java.net/browse/JDK-8164920
webrev: http://cr.openjdk.java.net/~gromero/8164920/01/

As Volker's comments in the above JIRA, this is a ppc64-only improvement 
which will not 
affect any of the Oracle platforms in any way. 

This change includes new implementation of CRC32 Intrinsics for ppc64le.
In my local experiment, CRC32 of 64KB was calculated more than 20 times 
faster than original. 
Performance of CRC32 Intrinsic is important to run recent Apache 
Cassandra.
A Cassandra daemon needs to read 64KB data from a disk with CRC32 checksum 
by default.

This JIRA entry has "jdk9-fc-request" label.
If there is a chance to include new change in JDK 9 for ppc64le, I would 
like to request 
a review for this change.

Regards,
Hiroshi
-----------------------
Hiroshi Horii, Ph.D.
IBM Research - Tokyo


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