RFR: 8255368: Math.exp() gives wrong result for large values on x86 32-bit platforms [v6]

[Vladimir Kozlov]

On Tue, 17 Nov 2020 02:19:05 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Xubo Zhang has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
>> 
>>   Fixed the bug in 32-bit build, exp generates 0 when the exponent is too large
>
> src/hotspot/cpu/x86/macroAssembler_x86_exp.cpp line 496:
> 
>> 494:   movl(Address(rsp, 64), tmp);
>> 495:   lea(tmp, ExternalAddress(static_const_table));
>> 496:   movsd(xmm0, Address(rsp, 128));
> 
> Can you explain this change?

Would be nice to add comment about what values are on stack.

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PR: https://git.openjdk.java.net/jdk/pull/894