[8u-dev] RFA: 8073670: TypeF::eq and TypeD::eq do not handle NaNs correctly

[David Buck]

Hi!

Please approve the backport of this small floating point C2 fix to 
8u-dev. The JDK 9 patch applies as-is.

bug report:
https://bugs.openjdk.java.net/browse/JDK-8073670

JDK 9 changeset:
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/fe7233679163

JDK 9 code review thread:
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2015-February/017214.html

testing done:
   - jprt (default and hotspot testsets)
   - manual confirmation with testcase

Cheers,
-Buck