RFR: 8360559: Optimize Math.sinh for x86 64 bit platforms

[Joe Darcy]

On Thu, 10 Jul 2025 14:31:02 GMT, Mohamed Issa <missa at openjdk.org> wrote:

> > What is the accuracy of the algorithm in ulps (units the last place)?
> > The java.lang.Math specification has max error and various other accuracy requirements any implementation must meet.
> 
> 0.51 ulps

Please add that as a comment to the changeset.

Also, if the worst-case inputs for this algorithm are known, they should the added as part of the core libraries regression tests for the math library.

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PR Comment: https://git.openjdk.org/jdk/pull/26152#issuecomment-3059152934