[8u20] Request for approval to backport JDK-8029302: Performance regression in Math.pow intrinsic

[Niclas Adlertz]

Please approve the backports of JDK-8029302 and JDK-8042052 (which fixes 
a bug introduced by JDK-8029302) from 9 to 8u20.

I intend to push them separately.

8029302: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/6314
          http://cr.openjdk.java.net/~adlertz/JDK-8029302/webrev01/

8042052: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/6385
          http://cr.openjdk.java.net/~anoll/8042052/webrev.01/

Kind Regards,
Niclas Adlertz