RFR (M): 8143355: Update for addition of vectorizedMismatch intrinsic for x86

Vladimir Kozlov vladimir.kozlov at oracle.com
Wed Dec 2 01:48:02 UTC 2015


This seems fine. 2x is for AVX implementation?

Thanks,
Vladimir

On 11/24/15 4:00 PM, Deshpande, Vivek R wrote:
> Hi all
>
> We would like to contribute a patch from Intel which optimizes
> vectorizedMismatch() method in java.util.ArraysSupport.java for X86
> architecture using AVX instructions.
>
> The improvement gives more than 2x gain over Unsafe implementation for
> long arrays.
>
>
>   The bug is blocked by bug: vectorized support for array
>   equals/compare/mismatch using Unsafe
>   (https://bugs.openjdk.java.net/browse/JDK-8136924.)
>
> Could you please review and sponsor this patch.
>
> Bug-id:
>
> https://bugs.openjdk.java.net/browse/JDK-8143355
> webrev:
>
> http://cr.openjdk.java.net/~mcberg/8143355/webrev.01/
>
> Thanks and regards,
>
> Vivek
>


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