RFR 8177784 Use CounterMode intrinsic for AES/GCM

Anthony Scarpino anthony.scarpino at oracle.com
Fri Apr 7 19:47:34 UTC 2017

On 04/07/2017 06:58 AM, Chris Hegarty wrote:
> On 06/04/17 21:39, Anthony Scarpino wrote:
>> I'd like to get a review for this performance change to use the existing
>> CounterMode parallelized intrinsic instead of GCTR's own version. The
>> two classes were nearly identical except for the doFinal() method which
>> doesn't belong in CounterMode.java.
>> I could have been more aggressive with this change, but I'm looking to
>> get this into 9, so I stayed away from completely merging GCTR into
>> CounterMode in case of incompatibilities.  All tests security and
>> hotspot tests pass.
>> http://cr.openjdk.java.net/~ascarpino/8177784/webrev/
> This change looks good to me. Trivially, the class-level comment in
> GCTR should be updated ( it refers to removed fields ). Also,
> CounterMode.counter could be protected ( rather than package-private ).
> -Chris.

Thanks Chris,

I left CounterMode.counter as package-private because the package is 
what becomes the SunJCE provider.  I don't believe there should be any 
outside package classes accessing this code.

I updated the webrev at with the comment update:


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