[lworld] RFR: 8298659: [lworld] ValueObject isSubstutitable comparison of float/double should use raw bits [v2]

[Roger Riggs]

On Fri, 9 Feb 2024 16:48:35 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Update the substitutability implementation to match the new JLS for JEP 401.
>> Float and double values should be compared for equality using the raw bits.
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert change to ObjectMethods to avoid changing behavior of equals for floats in records.
>   Create a separate cache of method pointers for substitutablity test for primitives in ValueObjectMethods.

Start fresh after rebase.

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PR Comment: https://git.openjdk.org/valhalla/pull/998#issuecomment-1981545649