RFR: 8373026: C2 SuperWord and Vector API: vector algorithms test and benchmark [v16]

[Emanuel Peter]

On Wed, 28 Jan 2026 23:07:49 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

>> Emanuel Peter has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Jatins typo fix part 2
>>    
>>    Co-authored-by: Jatin Bhateja <jatinbha.cloud at gmail.com>
>>  - Jatins typo fix part 1
>>    
>>    Co-authored-by: Jatin Bhateja <jatinbha.cloud at gmail.com>
>
> test/micro/org/openjdk/bench/vm/compiler/VectorAlgorithmsImpl.java line 534:
> 
>> 532:         for (; i < SPECIES_I512.loopBound(a.length); i += SPECIES_I512.length()) {
>> 533:             IntVector v = IntVector.fromArray(SPECIES_I512, a, i);
>> 534:             v = v.add(v.rearrange(shf1), mask1);
> 
> These are lane shifting operations, so another variant can use `compress` with the masks as input. Another could use `slice`, ideally the rearrange and slice variants would generate comparable code, or the compress and slice would.

Ah good ideas! I'll note that down for a follow-up RFE!

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/28639#discussion_r2740490494