[vectorIntrinsics] RFR: RFC: Vector API masking support proposal for Arm SVE [v3]

[Xiaohong Gong]

On Thu, 18 Mar 2021 11:35:48 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Xiaohong Gong has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add mask support for masked binary operations
>
> src/java.base/share/classes/jdk/internal/vm/vector/VectorSupport.java line 272:
> 
>> 270:     public static
>> 271:     <V, M>
>> 272:     V binaryMaskOp(int oprId, Class<? extends V> vmClass, Class<? extends M> maskClass,
> 
> Current patch make VectorSupport.binaryMaskOp the fundamental intrinsic for creating  a masked/non-masked vector nodes. Can you kindly elaborate the need for these changes.
> 
> I think an ideal transformation in compiler should be able to save any changes proposed in java code, unless there is any pressing need for it.

We proposed two solutions for generating the masked vector operations. Changing the intrinsic is one of them. Another is the same with your idea (please see the prototype: https://github.com/XiaohongGong/panama-vector/commit/372489feeae06bc53c46709d389cb0e46e9fb4f6). Actually we think both solutions can work. But they all have their advantages and shortages.

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

PR: https://git.openjdk.java.net/panama-vector/pull/40