[lworld+fp16] RFR: 8334432: Refine Float16.fma

[Joe Darcy]

On Fri, 21 Jun 2024 04:36:52 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Adding comments and test cases for Float16.fma.

Getting back to this PR, I pushed an update to the explanation about why Float16 fma is double arithmetic is sufficient and an initial update of the tests.

More test augmentation as previously discussed on the way.

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PR Comment: https://git.openjdk.org/valhalla/pull/1143#issuecomment-2261483729