RFR: 8365581: Optimize Java implementation of P256 arithmetic

[Ferenc Rakoczi]

On Fri, 15 Aug 2025 14:50:23 GMT, ExE Boss <duke at openjdk.org> wrote:

> > I see you are inlining some modulus values manually. You can mark the arrays as `@Stable` and check what performance gain can you have as a result, because then C2 can treat these values as constants and generate more optimal computations.
> 
> That works for everything except the zeroes in `oneActual`, `modulus`, and `zero`.

What do you mean by "works"? And why doesn't it work for the zeroes?

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PR Comment: https://git.openjdk.org/jdk/pull/26792#issuecomment-3206736648