RFR: 8321025: Enable Neoverse N1 optimizations for Neoverse V2

[Evgeny Astigeevich]

On Wed, 29 Nov 2023 17:26:01 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Okay in principle, but I have a question, there is another block below:
> 
> ```
>   // Neoverse V1
>   if (_cpu == CPU_ARM && model_is(0xd40)) {
>     if (FLAG_IS_DEFAULT(UseCryptoPmullForCRC32)) {
>       FLAG_SET_DEFAULT(UseCryptoPmullForCRC32, true);
>     }
>   }
> ```
> 
> Should it be enabled for V2 as well?

Good catch. I'll check whether V2 has the same or better `pmull` as V1.

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PR Comment: https://git.openjdk.org/jdk/pull/16887#issuecomment-1832412262