RFR: 8077587: BigInteger Roots [v61]

[fabioromano1]

On Wed, 30 Jul 2025 10:02:23 GMT, fabioromano1 <duke at openjdk.org> wrote:

>> This PR implements nth root computation for BigIntegers using Newton method.
>
> fabioromano1 has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update javadoc

src/java.base/share/classes/java/math/MutableBigInteger.java line 1921:

> 1919:      * The contents of {@code this} are <em>not</em> changed. The value of {@code this}
> 1920:      * is assumed to be non-negative and the root degree {@code n >= 3}.
> 1921:      * Assumes {@code bitLength() <= Integer.MAX_VALUE}.

@rgiulietti This assumption could be dropped, if the shift methods of `MutableBigInteger` would accept `long` shift values too.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24898#discussion_r2242202995