[vectorIntrinsics+fp16] RFR: 8299373: Extend vector conversion APIs for Halffloat type. [v3]

[Swati Sharma]

> Hi All,
> 
> The patch contains the below changes:
> 
> - Extended existing conversion APIs (convertShape, castShape, convert) for half float vectors.
> - Define new conversion operators for casting to/from halffloat type.
> - Extended existing JTREG conversion tests for half float types.
> 
> Please review and provide your feedback.
> 
> Thanks,
> Swati

Swati Sharma has updated the pull request incrementally with one additional commit since the last revision:

  8299373: Enabled test for Halffloat reinterpret, addressed the review comments.

-------------

Changes:
  - all: https://git.openjdk.org/panama-vector/pull/208/files
  - new: https://git.openjdk.org/panama-vector/pull/208/files/4dcfb8b2..6c0579ae

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=panama-vector&pr=208&range=02
 - incr: https://webrevs.openjdk.org/?repo=panama-vector&pr=208&range=01-02

  Stats: 12 lines in 1 file changed: 2 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/panama-vector/pull/208.diff
  Fetch: git fetch https://git.openjdk.org/panama-vector pull/208/head:pull/208

PR: https://git.openjdk.org/panama-vector/pull/208