RFR: 8325438: Add exhaustive tests for Math.round intrinsics

[Emanuel Peter]

On Wed, 7 Feb 2024 16:07:02 GMT, Hamlin Li <mli at openjdk.org> wrote:

> HI,
> Can you have a look at this patch adding some tests for Math.round instrinsics?
> Thanks!
> 
> ### FYI:
> During the development of RoundVF/RoundF, we faced the issues which were only spotted by running test exhaustively against 32/64 bits range of int/long.
> It's helpful to add these exhaustive tests in jdk for future possible usage, rather than build it everytime when needed.
> Of course, we need to put it in `manual` mode, so it's not run when `-automatic` jtreg option is specified which I guess is the mode CI used, please correct me if I'm assume incorrectly.

It would be nice to also have different kinds of inputs: randomized, and for floats also inf, nan, etc.

Also:
I think your new tests should not go into an old "cr" directory.
With `grep "Math.round" test/hotspot/jtreg/compiler/ -r` I see there are other tests in better directories.

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PR Comment: https://git.openjdk.org/jdk/pull/17753#issuecomment-1933619735
PR Comment: https://git.openjdk.org/jdk/pull/17753#issuecomment-1933622390