RFR: 8353786: Migrate Vector API math library support to FFM API [v3]

[Vladimir Ivanov]

On Mon, 7 Apr 2025 17:44:33 GMT, Chen Liang <liach at openjdk.org> wrote:

>> Vladimir Ivanov has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   features_string -> cpu_info_string
>
> src/jdk.incubator.vector/share/classes/jdk/incubator/vector/CPUFeatures.java line 44:
> 
>> 42:         String featuresString = VectorSupport.getCPUFeatures();
>> 43:         debug(featuresString);
>> 44:         String[] features = featuresString.toLowerCase().split(", "); // ", " is used as a delimiter
> 
> Please use `toLowerCase(Locale.ROOT)`: if the system locale is turkish, `I` and dotless i are two letters, and the dotless i will fail in the subsequent `validateFeatures` assertion. Same for `hasFeature`.

Good point. Fixed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24462#discussion_r2032135321