RFR: 8369123: Still more small Float16 refactorings [v4]

[Raffaello Giulietti]

On Mon, 6 Oct 2025 19:39:21 GMT, Joe Darcy <darcy at openjdk.org> wrote:

>> Upon further inspection, found a few more opportunities to refine the use of constants in the Float16 implementation.
>
> Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Respond to review feedback.

Marked as reviewed by rgiulietti (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27625#pullrequestreview-3310895870