On 11/19/18 12:50 PM, Kamath, Smita wrote:
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.kam...@intel.com <mailto:smita.kam...@intel.com> , Shay
Gueuron, (shay.gue...@intel.com <mailto:shay.gue...@intel.com>)and Regev
Shemy (regev.sh...@intel.com <mailto:regev.sh...@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
Hi,
This intrinsic is also used with solaris-sparc, has there been a sanity
check by anyone to make sure this does not break the sparc intrinsic?
It may work as the code is now since the sparc intrinsic will only use
the first two longs in the subkeyHtbl.
In that same idea, have you consider combining the subkeyH to be the
first two of subkeyHtbl for the non-avx operations? It would eliminate
an extra two longs per instance.
Tony
