RFR: 8252847: Optimize primitive arrayCopy stubs using AVX-512 masked instructions [v5]

[Nils Eliasson]

On Fri, 25 Sep 2020 20:48:10 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8252847 : Modifying file permission to resolve jcheck failure.
>
> src/hotspot/cpu/x86/stubGenerator_x86_64.cpp line 1264:
> 
>> 1262:   }
>> 1263:
>> 1264: #ifndef PRODUCT
> 
> macroAssembler_x86.hpp become big. May be we should start thing about splitting arraycopy stubs into separate file.

But lets do that in a another change. It is good that the AVX3 case is separated out in this change - makes it easy to
follow.

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PR: https://git.openjdk.java.net/jdk/pull/61