RFR: 8350459: MontgomeryIntegerPolynomialP256 multiply intrinsic with AVX2 on x86_64 [v4]

[Volodymyr Paprotski]

On Mon, 10 Mar 2025 23:07:45 GMT, Volodymyr Paprotski <vpaprotski at openjdk.org> wrote:

>> test/jdk/com/sun/security/util/math/intpoly/MontgomeryPolynomialFuzzTest.java line 30:
>> 
>>> 28: import sun.security.util.math.intpoly.*;
>>> 29: 
>>> 30: /*
>> 
>> It is strange that there are two copies of the `@test` block.  Can you please remove one of them, unless you are seeing a difference that I do not
>
> -XX:+/-UseIntPolyIntrinsics (test Java vs BigInt and intrinsic vs BigInt)
> 
> Though I think I did this before I knew much about junit.. I think I can just have two @run commands (to make it clearer)? Will give that a try

Turns out I do need both `@test`; (otherwise `make test TEST=...MontgomeryPolynomialFuzzTest.java` runs fewer tests). Seems other tests do the same.

I did add a (better?) comment to the summary tag.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23719#discussion_r1999760302