RFR: JDK-8320892: AArch64: Restore FPU control state after JNI [v3]

[Robbin Ehn]

On Tue, 5 Dec 2023 09:44:24 GMT, Andrew Haley <aph at openjdk.org> wrote:

>>> @theRealAph the `RestoreMXCSROnJNICalls` flag is a product flag not diagnostic.
>> 
>> Ah, thanks,
>> 
>>> Aliased flags are setup in arguments.cpp by editing this:
>> 
>> OK. How about we split this into two, this first part without a CSR, and the second part, which creates the generic alias, with one? That way we can mitigate a live problem in this release.
>
>> > @theRealAph the `RestoreMXCSROnJNICalls` flag is a product flag not diagnostic.
>> 
>> Ah, thanks,
>> 
>> > Aliased flags are setup in arguments.cpp by editing this:
>> 
>> OK. How about we split this into two, this first part without a CSR, and the second part, which creates the generic alias, with one? That way we can mitigate a live problem in this release.
> 
> Please? One day left.

@theRealAph IMHO we should add a new flag aliasing the old. Then deprecate MXCSR flag.

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PR Comment: https://git.openjdk.org/jdk/pull/16851#issuecomment-2066140616