RFR: 8302191: Performance degradation for float/double modulo on Linux [v5]

[David Holmes]

On Thu, 2 Mar 2023 13:13:56 GMT, Jan Kratochvil <duke at openjdk.org> wrote:

>> You can't move the _WIN64 workaround to the sharedRuntime_x86.cpp file as that code is also used by Windows-Aarch64. Whether it needs the workaround or not is another matter, but unless proven otherwise we have to assume it does.
>
>> You can't move the _WIN64 workaround to the sharedRuntime_x86.cpp file as that code is also used by Windows-Aarch64. Whether it needs the workaround or not is another matter, but unless proven otherwise we have to assume it does.
> 
> I hope/believe the bug affects only amd64 and not aarch64. I want to verify it but I have some difficulty getting remote access to such Windows boxes, I am working on the verification.

@jankratochvil can you update your master branch to latest and re-merge please. Unfortunately the current set of changes has a bug ([JDK-8302189](https://bugs.openjdk.org/browse/JDK-8302189)) that prevents building on macOS.

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PR: https://git.openjdk.org/jdk/pull/12508