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

[Fei Yang]

On Tue, 21 Jan 2025 02:36:32 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> Same, my bad. (guarantee in zli_s on that Rs is uimm5.)
>> 
>> As we already an guarantee, maybe assert(can_zfa..) ?
>
> How about we do this directly on the callsite?
> 
>   int Rs = -1;
>   if (can_zfa_zli_float(imm, &Rs)) {
>     _fli_s(Rd, Rs);
>   }

Or can we use `zfa_zli_lookup_float/double` instead here?

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PR Review Comment: https://git.openjdk.org/jdk/pull/23171#discussion_r1923401155