[vectorIntrinsics+fp16] RFR: Merge vectorIntrinsics [v3]

[Bhavana Kilambi]

On Thu, 28 Aug 2025 02:11:33 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Merge vectorIntrinsics into vectorIntrinsics+fp16 as per the proposal on panama-dev mailing list[1]. This was a major merge after a gap of 2+ years.
>> 
>> Summary of changes:-
>>    - Added a new package-private field CTYPE (carrier type) along with existing ETYPE (element type) to differentiate b/w the storage type from the vector lane element type.
>>    - Pass an explicit operType argument to inline expanders to ease inferencing of Float16 vector IR. Idea: leverage existing backend implementation added along with JDK-8346236[2] and [3]
>>    - Appropriate modifications in existing inline expansion entry points and VectorSupport class.
>>    - Replaced existing Halffloat class references with jdk.incubator.vector.Float16, along with appropriate API adjustments.
>>   
>> What is remaining:-
>>   -    Use the newly passed operType to infer Float16 Vector IR.
>>   -    Functional validation
>>   - Performance validation
>>  
>> [1] https://mail.openjdk.org/pipermail/panama-dev/2025-August/021100.html
>> [2] https://github.com/openjdk/jdk/pull/22755
>> [3] https://github.com/openjdk/jdk/pull/22754
>
> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
> 
>   jcheck fix

[fix_aarch64_build_failures.patch](https://github.com/user-attachments/files/22042191/fix_aarch64_build_failures.patch)

Hi Jatin, please find attached the diff file to fix the build failures on aarch64. The build now passes on aarch64.

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PR Comment: https://git.openjdk.org/panama-vector/pull/230#issuecomment-3236295722