RFR: 8077587: BigInteger Roots [v78]

[Raffaello Giulietti]

On Wed, 3 Sep 2025 09:24:32 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> fabioromano1 has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Revision changes
>
> src/java.base/share/classes/java/math/MutableBigInteger.java line 2059:
> 
>> 2057:                 /* The Newton's recurrence roughly duplicates the correct bits at each iteration.
>> 2058:                  * Instead of shifting the approximate root into the original range right now,
>> 2059:                  * we only duplicate its bit length and then refine it with Newton's recurrence,
> 
> Suggestion:
> 
>                 /* The Newton's recurrence roughly doubles the correct bits at each iteration.
>                  * Instead of shifting the approximate root into the original range right now,
>                  * we only double its bit length and then refine it with Newton's recurrence,

In `BigIntegerTest`, the methods related to nth-root do not seem to be invoked.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24898#discussion_r2318395246