RFR: 8315856: RISC-V: Use Zacas extension for cmpxchg [v2]

[Ludovic Henry]

On Mon, 11 Dec 2023 11:27:04 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> Ludovic Henry has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:
>> 
>>  - review
>>  - Merge branch 'master' of github.com:openjdk/jdk into upstream-zacas
>>  - 8315856: RISC-V: Use Zacas extension for cmpxchg
>
> src/hotspot/cpu/riscv/macroAssembler_riscv.hpp line 1079:
> 
>> 1077:               Assembler::Aqrl acquire = Assembler::relaxed, Assembler::Aqrl release = Assembler::relaxed);
>> 1078: 
>> 1079:   static bool far_branches() {
> 
> Is this related ?

Not at all, it's a merge-conflict-fix gone wrong. Let me fix right now.

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PR Review Comment: https://git.openjdk.org/jdk/pull/16910#discussion_r1422335509