[8u20]: Request for approval - 8035394: PPC64: Make usage of intrinsic dsqrt depend on processor recognition.

[Lindenmaier, Goetz]

Hi,

please review this change for backport to 8u via ppc-aix-port/stage.

Only some PPC processors have a sqrt instruction.
Currently, intrinsic for dsqrt is used if a corresponding rule is implemented in the .ad file (has_match_rule()).
Instead, call match_ruole_supported(), which allows to check processor properties.
Also adapt PPC64 .ad file to this.

changeset: http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/0f19095fd8c1
bug:   https://bugs.openjdk.java.net/browse/JDK-8035394
review:  http://mail.openjdk.java.net/pipermail/hotspot-dev/2014-February/012642.html

original webrev: http://cr.openjdk.java.net/~goetz/webrevs/8035394-1-fltRck/

Thanks and best regards,
Goetz.
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