RFR: 8288047: Accelerate Poly1305 on x86_64 using AVX512 instructions [v9]

[Volodymyr Paprotski]

On Wed, 9 Nov 2022 00:10:48 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Volodymyr Paprotski has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   fix 32-bit build
>
> src/hotspot/share/opto/library_call.cpp line 7014:
> 
>> 7012:   const TypeKlassPtr* rklass = TypeKlassPtr::make(instklass_ImmutableElement);
>> 7013:   const TypeOopPtr* rtype = rklass->as_instance_type()->cast_to_ptr_type(TypePtr::NotNull);
>> 7014:   Node* rObj = new CheckCastPPNode(control(), rFace, rtype);
> 
> FTR it's an unsafe cast since it  doesn't involve a runtime check from `IntegerModuloP` to `ImmutableElement`. Please, lift as much checks into Java wrapper as possible.

@iwanowww just to save some of your time...  Sandhya suggested another way to move the checks to Java, hopefully without too much penalty to non-intrinsic path. Should upload it later today.

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PR: https://git.openjdk.org/jdk/pull/10582