RFR: 8311207: Cleanup for Optimization for UUID.toString [v14]

[温绍锦]

On Sun, 10 Sep 2023 15:59:05 GMT, 温绍锦 <duke at openjdk.org> wrote:

>> Filed https://bugs.openjdk.org/browse/JDK-8315968 - we should also get @JimLaskey to weigh in here (who's recently authored the `java.util.Digits` code). Tl;dr: I think it'd be good to consolidate and share the code to produce these packed digit pairs.
>> 
>> Also note that there might be some issues on big-endian systems with recent changes, so let's figure that out first: https://bugs.openjdk.org/browse/JDK-8310929
>
> https://github.com/wenshao/jdk/tree/fix_14699_big_endian
> 
> I have a [branch](https://github.com/wenshao/jdk/tree/fix_14699_big_endian) ready to fix the big endian problem and need someone to create an issue

https://github.com/openjdk/jdk/pull/15652

I've submitted a PR to fix the big endian problem

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PR Review Comment: https://git.openjdk.org/jdk/pull/14745#discussion_r1320813162