RFR: 8289552: Make intrinsic conversions between bit representations of half precision values and floats [v2]

[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:

  Added a jmh microbenchmark

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9781/files
  - new: https://git.openjdk.org/jdk/pull/9781/files/d04fb405..bcbc2f56

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9781&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9781&range=00-01

  Stats: 96 lines in 1 file changed: 96 ins; 0 del; 0 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