RFR: JDK-8316708: Augment WorstCaseTests with more cases [v3]

[Joe Darcy]

On Fri, 23 Feb 2024 19:18:22 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> > Both `Math.cos` and `StrictMath.cos` produce the correctly rounded result here. I don't know why the paper says otherwise. Perhaps OpenLibm is not exactly fdlibm.
> 
> I've looked a bit over the OpenLibm changelog. They've added a few special cases for exp and pow as least. OpenLibm itself is a direct derivative of one of the BSD math libraries, which in turn was derived from FDLIBM.

The BSDs look to have changed/improved the kernel cos computation in their fork.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15879#discussion_r1501713166