[vectorIntrinsics+mask] RFR: 8273264: AArch64: [vector] Add missing rules for VectorMaskCast [v2]

[Eric Liu]

On Mon, 13 Sep 2021 15:31:29 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

>> Eric Liu has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
>> 
>>  - small fix
>>    
>>    Change-Id: I4f5b75c498a3daadf9938e64be5021c43068af67
>>  - Merge remote-tracking branch 'upstream/vectorIntrinsics+mask' into masked-cast
>>    
>>    Change-Id: I5f9e0f627090bb914d496b757091461dbd6a7f72
>>  - 8273264: AArch64: [vector] Add missing rules for VectorMaskCast
>>    
>>    This patch
>>    1. Adds missing rules for VectorMaskCast for compatible species, E.g.
>>       ByteVector.SPECIES_64 --> ShortVector.SPECIES_128
>>    2. Fixes a matching failure on AArch64.
>>    
>>    The performance improves about 60% compared with the unintrinsified
>>    version.
>>    
>>    Change-Id: I1bcfc5a09b93c5f4625f39bd3b6a146154f69ad7
>
> test/hotspot/jtreg/compiler/vectorapi/VectorMaskCastTest.java line 52:
> 
>> 50: 
>> 51: 
>> 52: public class VectorMaskCastTest{
> 
> Do we need to add such a test? We already have conversions tests, see sub-classes of `AbstractVectorConversionTest`.

I tested with those conversion tests before, but the method could not be intrinsified. I checked generated code and the new test cases could work.

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PR: https://git.openjdk.java.net/panama-vector/pull/124