RFR: 8367603: Optimize exact division in BigDecimal [v18]

[Raffaello Giulietti]

On Fri, 26 Sep 2025 13:37:24 GMT, fabioromano1 <duke at openjdk.org> wrote:

>> A formula to lower the overestimate for the precision of an exact quotient, without introducing too expensive operations of division on numerator and denominator.
>
> fabioromano1 has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review's changes

LGTM.
Thanks @fabioromano1 for your efforts on yet another performance enhancement.

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Marked as reviewed by rgiulietti (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27271#pullrequestreview-3272337606