RFR: 8354242: VectorAPI: combine vector not operation with compare [v8]

[erifan]

On Wed, 11 Jun 2025 05:23:12 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> erifan has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Support negating unsigned comparison for BoolTest::mask
>>   
>>   Added a static method `negate_mask(mask btm)` into BoolTest class to
>>   negate both signed and unsigned comparison.
>
> test/hotspot/jtreg/compiler/vectorapi/VectorMaskCompareNotTest.java line 158:
> 
>> 156:         } else if (op == VectorOperators.UGT) {
>> 157:             Asserts.assertEquals(compareUnsigned(a, b) <= 0, r);
>> 158:         }
> 
> Please refactor it as a `switch`. And add a `default` case where you throw some `RuntimeException`. just to make sure we are not missing anything :)

`VectorOperators.XXX` is not compile time constants, we can't use `switch` here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24674#discussion_r2139418759