[lworld] RFR: 8298659: [lworld] ValueObject isSubstutiable comparison of float/double should use raw bits

[Roger Riggs]

Correct substitutability comparison of float and double using the raw-bits as indicated in JEP 401.

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Commit messages:
 - 8298659: [lworld] ValueObject isSubstutitable comparison of float/double should use raw bits

Changes: https://git.openjdk.org/valhalla/pull/1039/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1039&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298659
  Stats: 81 lines in 2 files changed: 66 ins; 4 del; 11 mod
  Patch: https://git.openjdk.org/valhalla/pull/1039.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1039/head:pull/1039

PR: https://git.openjdk.org/valhalla/pull/1039