8215262: PPC64: FMA Vectorization on PPC64

Doerr, Martin martin.doerr at sap.com
Wed Dec 12 15:53:25 UTC 2018

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,

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,
IBM Research - Tokyo
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