8215262: PPC64: FMA Vectorization on PPC64

[Doerr, Martin]

Hi Michihiro,

this looks good to me. We should be able to test it since it is for Power8. Maybe Gustavo would like to test in addition.

Best regards,
Martin


From: Michihiro Horie <HORIE at jp.ibm.com>
Sent: Mittwoch, 12. Dezember 2018 15:50
To: ppc-aix-port-dev at openjdk.java.net; hotspot compiler <hotspot-compiler-dev at openjdk.java.net>
Cc: Gustavo Romero <gromero at linux.vnet.ibm.com>; Doerr, Martin <martin.doerr at sap.com>; Simonis, Volker <volker.simonis at sap.com>
Subject: RFR: 8215262: PPC64: FMA Vectorization on PPC64


Dear all,

Would you please review the following change?
This change supports FMA vectorization on PPC64.

Bug: https://bugs.openjdk.java.net/browse/JDK-8215262
Webrev: http://cr.openjdk.java.net/~mhorie/8215262/webrev.00/

Microbenchmark I used is http://cr.openjdk.java.net/~mhorie/8215262/VFma.java
It showed ~50% reduction in the execution time.

I also tested with JTREG and there was no difference in the results compared to the original.


Best regards,
--
Michihiro,
IBM Research - Tokyo
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