Hello,
What is the purpose of setting some of them to 0 twice? (It’s a new array which
should be all-0 anyway.)
+ for (int i = 1; i < 9 ; i++) {
+ subkeyHtbl[2*i] = 0;
+ subkeyHtbl[2*i+1] = 0;
+ }
Also, is the subkeyH no longer be needed (or can be redesigned to use
subkeyHtbl[0] and 1?
Gruss
Bernd
--
http://bernd.eckenfels.net
________________________________
Von: core-libs-dev <core-libs-dev-boun...@openjdk.java.net> im Auftrag von
Kamath, Smita <smita.kam...@intel.com>
Gesendet: Montag, November 19, 2018 10:52 PM
An: 'Vladimir Kozlov'
Cc: Anthony Scarpino; core-libs-...@openjdk.java.net; hotspot compiler
Betreff: RFR(S)JDK-8214074: Ghash optimization using AVX instructions
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
