RFR: 8347981: RISC-V: Add Zfa zli imm loads [v2]

[Fei Yang]

On Tue, 21 Jan 2025 08:25:25 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> src/hotspot/cpu/riscv/globals_riscv.hpp line 106:
>> 
>>> 104:   product(bool, UseZbb, false, DIAGNOSTIC, "Use Zbb instructions")               \
>>> 105:   product(bool, UseZbs, false, DIAGNOSTIC, "Use Zbs instructions")               \
>>> 106:   product(bool, UseZfa, false, DIAGNOSTIC, "Use Zfa instructions")               \
>> 
>> Is there any hardware available for testing?
>
> I don't have such hardware anyways. Make exprimental?

Yeah, I would suggest make it experimental without the hardware. That's what we always do.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23171#discussion_r1924644333