RFR: 8320448: Accelerate IndexOf using AVX2 [v37]

[Scott Gibbons]

On Fri, 24 May 2024 17:59:49 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Scott Gibbons has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   mov64 => lea(InternalAddress)
>
> My testing for v34 passed without new failures.

Thank you @vnkozlov .  Waiting for review from @sviswa7 and @jatin-bhateja, then I'll integrate.

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PR Comment: https://git.openjdk.org/jdk/pull/16753#issuecomment-2130114623