RFR: 8346236: Auto vectorization support for various Float16 operations [v8]

[Emanuel Peter]

On Tue, 13 Jan 2026 05:31:00 GMT, Galder Zamarreño <galder at openjdk.org> wrote:

>> To avoid dependency on an incubating module.
>
> I was trying to use this API today and I was wondering the exact same thing. I would have expected this to be `Generator<Float16> float16s()`. I can see @jatin-bhateja's point but this should have been noted in the code for future readers? Is this being tracked somewhere?
> 
> Anyway, again for future readers, this is what I've done to actually get a `Float16[]`, to avoid the need to first generate a `short[]` and fill that before transforming it to to `Float16[]`:
> 
> 
>   private static Float16[] input_47 = new Float16[10000];
>   private static final Generator<Short> GEN_input_47 = Generators.G.float16s();
> 
>   static void fill_input_47(Float16[] a) {
>     for (int i = 0; i < a.length; i++) {
>       a[i] = Float16.shortBitsToFloat16(GEN_input_47.next());
>     }
>   }
> 
>   static {
>     fill_input_47(input_47);
>   }

@galderz No, it is not tracked. Feel free to file an RFE and add documentation.

One reason to use `short[]` is that it allows us to auto vectorize. A `Float[]` is an Object array and that would prevent vectorization.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22755#discussion_r2685757916