RFR: 8289552: Make intrinsic conversions between bit representations of half precision values and floats [v6]

[Smita Kamath]

> 8289552: Make intrinsic conversions between bit representations of half precision values and floats

Smita Kamath has updated the pull request incrementally with one additional commit since the last revision:

  Addressed review comments, updated microbenchmark

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9781/files
  - new: https://git.openjdk.org/jdk/pull/9781/files/1570e244..a4bfb34a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9781&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9781&range=04-05

  Stats: 47 lines in 5 files changed: 45 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/9781.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9781/head:pull/9781

PR: https://git.openjdk.org/jdk/pull/9781