RFR: 8370922: Template Framework Library: Float16 type and operations

[Benoît Maillard]

On Fri, 31 Oct 2025 22:23:28 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> We should test `Float16` with Template Framework Tests. For this, I'm now implementing:
> 
> - Template Framework Library: add `Float16Type` that represents `Float16`. Extend `Operations.java` with `Float16` operations.
> - `Verify.java`: add verification for `Float16`, and corresponding tests in `TestVerifyIncubatorVector.java`. We could have done this separately, but it is not much code and completes the pipeline from code generation through execution and finally result verification in the following two tests.
> - Adding `Float16` to `ExpressionFuzzer.java` and `TestExpressions.java`.

Looks good to me, nice work! I only have one question.

test/hotspot/jtreg/compiler/igvn/ExpressionFuzzer.java line 343:

> 341:         // Generate expressions with any scalar numeric types.
> 342:         for (CodeGenerationDataNameType type : SCALAR_NUMERIC_TYPES) {
> 343:             for (int i = 0; i < 2; i++) {

What does this loop do? And why do we have only 2 iterations here, but 10 for `PRIMITIVE_TYPES`?

-------------

Marked as reviewed by bmaillard (Committer).

PR Review: https://git.openjdk.org/jdk/pull/28095#pullrequestreview-3572915843
PR Review Comment: https://git.openjdk.org/jdk/pull/28095#discussion_r2615052804