RFR: 8354242: VectorAPI: combine vector not operation with compare [v7]

[Emanuel Peter]

On Thu, 5 Jun 2025 09:48:46 GMT, erifan <duke at openjdk.org> wrote:

> Oh I think we still cannot use `BoolTest::negate`, because we cannot instantiate a `BoolTest` object with **unsigned** comparison. `BoolTest::negate` is a non-static function.

I see. Ok. Hmm. I still think that the logic should be in `BoolTest`, because that is where the exact implementation of the enum values is. In that context it is easier to see why `^4` does the negation. And imagine we were ever to change the enum values, then it would be harder to find your code and fix it.

Maybe it could be called `BoolTest::negate_mask(mast btm)` and explain in a comment that both signed and unsigned is supported.

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PR Comment: https://git.openjdk.org/jdk/pull/24674#issuecomment-2943747849