RFR: 8368985: Small Float16 refactorings [v2]

[Raffaello Giulietti]

On Wed, 1 Oct 2025 16:06:45 GMT, Joe Darcy <darcy at openjdk.org> wrote:

>> A few more small cleanups to Float16 and its tests.
>
> Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Respond to review feedback.

src/jdk.incubator.vector/share/classes/jdk/incubator/vector/Float16.java line 756:

> 754:     public static boolean isInfinite(Float16 f16) {
> 755:         return ((float16ToRawShortBits(f16) ^ float16ToRawShortBits(POSITIVE_INFINITY)) &
> 756:                 (EXP_BIT_MASK | SIGNIF_BIT_MASK)) == 0;

IMHO, `isNan()` and `isInfinite()` should look almost identical, except for the significand bits.
Maybe for another time.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27587#discussion_r2395223913