RFR(S)JDK-8214074: Ghash optimization using AVX instructions

[Kamath, Smita]

Hi Vladimir,

I'd like to contribute an optimization for GHASH Algorithm using AVX Instructions. I have tested this optimization on SKX x86_64 platform and it shows ~20-30% performance improvement for larger message sizes (for example 8k).

I, smita.kamath at intel.com<mailto:smita.kamath at intel.com> , Shay Gueuron, (shay.gueron at intel.com<mailto:shay.gueron at intel.com>) and Regev Shemy (regev.shemy at intel.com<mailto:regev.shemy at intel.com>) are contributors to this code.

Link to Bug: https://bugs.openjdk.java.net/browse/JDK-8214074

Link to webrev: http://cr.openjdk.java.net/~svkamath/ghash/webrev/

For testing the implementation, I have executed TestAESMain.java. I have executed Jtreg tests and tested this code on 64 bit Windows and Linux platforms.

Please review and let me know if you have any comments.

Thanks and Regards,
Smita

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