[vectorIntrinsics+mask] RFR: 8273949: Intrinsic creation for VectorMask.toLong operation. [v6]

[Jie Fu]

On Thu, 23 Sep 2021 03:16:38 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Summary of changes:
>> - Intrinsification of VectorMask.toLong() API.
>> - Supports inline expansion for both AVX512 and non-AVX512 targets.
>> - Used toLong() API to optimize existing Java API implementation of VectorMask.laneIsSet() operation.
>> 
>> Following performance number are generated using JMH benchmark modification included with the patch.
>> 
>> System:  Intel(R) Xeon(R) Platinum 8280 CPU @ 2.70GHz (Cascade Lake Server 28C 2S)
>> 
>> Benchmark | VECSIZE | Baseline Score (ops/ms) | With Opt (ops/ms) | Gain Ratio
>> -- | -- | -- | -- | --
>> MaskQueryOperationsBenchmark.testToLongByte | 128 | 90451.424 | 346941.379 | 3.835665196
>> MaskQueryOperationsBenchmark.testToLongByte | 256 | 63127.764 | 338331.425 | 5.359471072
>> MaskQueryOperationsBenchmark.testToLongByte | 512 | 40543.264 | 313836.333 | 7.740776199
>> MaskQueryOperationsBenchmark.testToLongLong | 128 | 171989.714 | 152872.758 | 0.88884826
>> MaskQueryOperationsBenchmark.testToLongLong | 256 | 164702.273 | 324794.578 | 1.972010295
>> MaskQueryOperationsBenchmark.testToLongLong | 512 | 122667.916 | 318060.096 | 2.59285481
>> MaskQueryOperationsBenchmark.testToLongShort | 128 | 122656.408 | 346691.082 | 2.826522378
>> MaskQueryOperationsBenchmark.testToLongShort | 256 | 96838.555 | 360909.28 | 3.726917239
>> MaskQueryOperationsBenchmark.testToLongShort | 512 | 63119.009 | 313075.159 | 4.960077225
>> MaskQueryOperationsBenchmark.testToLonglong | 128 | 180855.623 | 324620.433 | 1.794914792
>> MaskQueryOperationsBenchmark.testToLonglong | 256 | 122705.631 | 324315.916 | 2.643040204
>> MaskQueryOperationsBenchmark.testToLonglong | 512 | 90396.687 | 324318.095 | 3.58772103
>
> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8273949: Resolving synthetic comment.

Incorrect computation after this pr.
Please see: https://github.com/openjdk/panama-vector/pull/138 .
Thanks.

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PR: https://git.openjdk.java.net/panama-vector/pull/126