RFR: 8283667: [vectorapi] Vectorization for masked load with IOOBE with predicate feature [v2]

[Xiaohong Gong]

On Thu, 31 Mar 2022 02:15:26 GMT, Quan Anh Mai <duke at openjdk.java.net> wrote:

>> I'm afraid not. "Load + Blend" makes the elements of unmasked lanes to be `0`. Then a full store may change the values in the unmasked memory to be 0, which is different with the mask store API definition.
>
> The blend should be with the intended-to-store vector, so that masked lanes contain the need-to-store elements and unmasked lanes contain the loaded elements, which would be stored back, which results in unchanged values.

Hi @merykitty @jatin-bhateja , could you please help to take a review at the similar store masked PR https://github.com/openjdk/jdk/pull/8544 ? Any feedback is welcome! Thanks so much!

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PR: https://git.openjdk.java.net/jdk/pull/8035