[vectorIntrinsics+fp16] RFR: 8305563: [vectorapi]: Initial aarch64 backend implementation for FP16 operations

[Bhavana Kilambi]

On Mon, 26 Jun 2023 13:45:06 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> This patch adds aarch64 (Neon and SVE) backend implementation for the following FP16 operations for which C2 support was added in the commit https://github.com/openjdk/panama-vector/commit/7460d9327aac7d1d2ba6aed4e7137a417dbf6a97 -
>> 
>> Unary operations : AbsVHF, NegVHF
>> Binary operations : AddVHF, SubVHF, MulVHF, DivVHF
>> Ternary operations : AddReductionVHF, FmaVHF
>> Conversion operations : VectorCastHF2D, VectorCastD2HF
>> 
>> Some of these operations on Neon machines, require features "fphp" and "asimdhp" to be available. Feature detection for these features have also been added.
>
> This all looks reasonable enough, except for a couple of minor niggles.

@theRealAph Thank you for your review. Will update a new patchset soon.

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PR Comment: https://git.openjdk.org/panama-vector/pull/217#issuecomment-1607584872