RFR: 8373998: RISC-V: simple optimization of ConvHF2F

[Fei Yang]

On Thu, 18 Dec 2025 11:41:13 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Hi,
> Can you help to review this patch?
> 
> ConvHF2F could be optimized by following patch.
> As riscv does not have the restriction to use `iRegINoSp` in src register, it can use iRegIorL2I instead.
> Check other usages of src register in riscv.ad file.
> 
> @RealFYang Thanks!
> 
> Thanks!

Thanks. My local hs:tier1 - hs:tier2 test with `Zfh` is good using fastdebug build.

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Marked as reviewed by fyang (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/28896#pullrequestreview-3595932722