[vectorIntrinsics] RFR: RFC: Vector API masking support proposal for Arm SVE [v2]

[Xiaohong Gong]

On Fri, 12 Mar 2021 15:20:20 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Xiaohong Gong has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains six commits:
>> 
>>  - Add mask support for masked vector store
>>  - AArch64 backend implementation for masked IRs
>>  - Add SVE specific load/store vector mask IRs
>>  - Split one "VectorMaskCmpNode" into two nodes
>>  - Basic support for mask
>>  - SVE predicate register allocation support
>
> src/hotspot/cpu/aarch64/aarch64.ad line 2472:
> 
>> 2470: 
>> 2471: const bool Matcher::match_rule_supported_masked_vector(int opcode, int vlen, BasicType bt) {
>> 2472:   if (!match_rule_supported(opcode) || !vector_size_supported(bt, vlen)) {
> 
> Can we not just use existing routine match_rule_supported_vector here?

This can be improved in future. But I think it's different with `match_rule_supported_vector`. It's used to check whether the optimized predicate version is supported/implemented for an operation.

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