RFR: 8369123: Still more small Float16 refactorings [v2]

[Joe Darcy]

> 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:

  Remove unneeded use of "Float16.".

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/27625/files
  - new: https://git.openjdk.org/jdk/pull/27625/files/761f16f1..be2b4ab8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27625&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27625&range=00-01

  Stats: 7 lines in 1 file changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/27625.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27625/head:pull/27625

PR: https://git.openjdk.org/jdk/pull/27625