RFR: 8330094: RISC-V: Save and restore FCSR in the call stub [v2]

[Hamlin Li]

On Mon, 15 Apr 2024 16:07:17 GMT, Ludovic Henry <luhenry at openjdk.org> wrote:

>> Hamlin Li has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - update comment accordingly
>>  - skip setting frm when not needed
>
> src/hotspot/cpu/riscv/stubGenerator_riscv.cpp line 308:
> 
>> 306:     Label skip_fsrmi;
>> 307:     __ mv(t1, __ RoundingMode::rne);
>> 308:     __ beq(t0, t1, skip_fsrmi);
> 
> You can take advantage of `RoundingMode::rne == 0` by doing `__ beq(t0, zr, skip_fsrmi)` and remove the above `__ mv(t1, __ RoundingMode::rne);`. Please add a `guarantee(__ RoundingMode::rne == 0)` as well, just to self-document.

Thanks, fixed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18758#discussion_r1566084779