Integrated: 8356875: RISC-V: extension flag UseZvfh should depends on UseZfh

[Hamlin Li]

On Tue, 13 May 2025 13:53:35 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Hi,
> Can you help to review this simple patch?
> If we don't enable such dependency, then there will be situation that when Zvfh is enabled but Zfh is disabled, and optimizations depending on Zvfh will be disabled (e.g. in C2) because Zfh related IR node are considered not supported.
> 
> Thanks!
> 
> By [rvv spec](https://github.com/riscvarchive/riscv-v-spec/blob/master/v-spec.adoc#185-zvfh-vector-extension-for-half-precision-floating-point), `The Zvfh extension depends on the Zve32f and Zfhmin extensions.`
> But I think in logic and JVM code, we should let `Zvfh` depends on `Zfh`.

This pull request has now been integrated.

Changeset: 2e26b431
Author:    Hamlin Li <mli at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/2e26b431585129b705f57955b660d155eaf138b8
Stats:     9 lines in 1 file changed: 6 ins; 0 del; 3 mod

8356875: RISC-V: extension flag UseZvfh should depends on UseZfh

Reviewed-by: fyang, luhenry

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PR: https://git.openjdk.org/jdk/pull/25213