RFR: 8327652: S390x: Implements SLP support [v5]

[Sidraya Jayagond]

On Fri, 22 Mar 2024 05:23:36 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

>> Sidraya Jayagond has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Address code cleanup review comments
>
> src/hotspot/cpu/s390/sharedRuntime_s390.cpp line 422:
> 
>> 420:     map->set_callee_saved(VMRegImpl::stack2reg(offset>>2), RegisterSaver_LiveVRegs[i].vmreg);
>> 421:     offset += v_reg_size;
>> 422:   }
> 
> just in case you like this one. 
> Suggestion:
> 
>   for (int i = 0; i < vregstosave_num; i++, offset += v_reg_size) {
>     int reg_num  = RegisterSaver_LiveVRegs[i].reg_num;
> 
>     __ z_vst(as_VectorRegister(reg_num), Address(Z_SP, offset));
> 
>     map->set_callee_saved(VMRegImpl::stack2reg(offset>>2), RegisterSaver_LiveVRegs[i].vmreg);
>   }

This seems more readable code, Fixing it.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18162#discussion_r1537411943