[8u-dev] Request for approval to backport: 8081778: Use Intel x64 CPU instructions for RSA acceleration

[Ivan Gerasimov]

Hello!

I'm seeking an approval to backport this performance enhancement to 
jdk8u-dev.
The change applies *almost* cleanly.
The only change I had to make was adding the extra argument to the 'new' 
operator, which is required in jdk8, but not jdk9.

Bug: https://bugs.openjdk.java.net/browse/JDK-8081778
Jdk9 hotspot change: 
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/578f086f3435
Jdk9 jdk change: http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/de309dbe42bf
Jdk9 review: 
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2015-May/018106.html

The changes, comparing to jdk9 are in
hotspot/src/share/vm/opto/library_call.cpp  at lines #5956 and #5964;

Jdk8 webrev: http://cr.openjdk.java.net/~igerasim/8081778/00/webrev/

Patched Jdk was successfully built and tested on all supported platforms.

Would you please approve this backport?

Sincerely yours,
Ivan