[aarch64-port-dev ] RFR: 8182583: AArch64: FMA Vectorization on aarch64

[Yang Zhang]

Hi Andrew

Vector FMA instructions for X86 have been enabled in jdk10. This patch
is to enable vector FMA for aarch64 jdk10. The jtreg is passed and
there isn't new failed test.
With this patch, vector FMA instructions (fmla/fmls) can be generated.
And there is obvious performance improvement (2~3.6 times faster using
jmh microbenchmark).


Webrev:
http://cr.openjdk.java.net/~njian/8182583/webrev.00/

Bug:
https://bugs.openjdk.java.net/browse/JDK-8182583

Would you please help to review it?

Regards,
Yang