RFR: 8302191: Performance degradation for float/double modulo on Linux [v2]

[Jan Kratochvil]

On Wed, 1 Mar 2023 08:48:58 GMT, Jan Kratochvil <duke at openjdk.org> wrote:

>> src/hotspot/share/runtime/sharedRuntime.cpp line 236:
>> 
>>> 234: const julong double_infinity  = CONST64(0x7FF0000000000000);
>>> 235: 
>>> 236: #ifndef X86
>> 
>> I wonder if the WIN64 workaround is actually needed/valid for non-X86 windows?
>
> It is true the comment says:
>> 64-bit Windows on amd64 returns the wrong values for infinity operands.
> 
> I have left the workaround really just for AMD64 Windows now. I am going to get it regression tested on aarch64 if that is enough.

So the _WIN64 workaround will be always there.

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