RFR: 8267356: AArch64: Vector API SVE codegen support [v7]

[Nick Gasson]

On Fri, 17 Sep 2021 06:53:06 GMT, Ningsheng Jian <njian at openjdk.org> wrote:

>> This is the integration of current SVE work done in panama-vector/vectorIntrinscs, which includes:
>> 
>> 1. Code generation for Vector API c2 IR nodes with SVE.
>> 2. Non-max vector size support with SVE, e.g. using *128Vector (and *64Vector) APIs on 256-bit SVE environment could also generate optimized SVE instructions with predicate feature.
>> 3. Some more SVE assemblers (and tests) used by the codegen part.
>> 
>> Note: VectorMask<E\> is still represented in vector register, a further improvement to map mask to predicate register is under development at https://github.com/openjdk/panama-vector/tree/vectorIntrinsics+mask
>> 
>> 
>> Test: tier1-3 with vector api test cases passed on 512-bit SVE hardware with MaxVectorSize=16/32/64.
>
> Ningsheng Jian has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains six commits:
> 
>  - Merge with master
>  - Merge with master
>  - More comments from Andrew.
>  - Add missing part
>  - Address Andrew's comments
>  - 8267356: AArch64: Vector API SVE codegen support
>    
>    This is the integration of current SVE work done in
>    panama-vector/vectorIntrinscs, which includes:
>    
>    1. Code generation for Vector API c2 IR nodes with SVE.
>    2. Non-max vector size support with SVE, e.g. using *128Vector APIs on
>       256-bit SVE environment could also generate optimized SVE
>       instructions with predicate feature.
>    3. Some more SVE assemblers (and tests) used by the codegen part.
>    
>    Note: VectorMask<E> is still represented in vector register, a further
>    improvement to map mask to predicate register is under development at
>    https://github.com/openjdk/panama-vector/tree/vectorIntrinsics+mask
>    
>    Test: tier1-3 with vector api test cases passed on 512-bit SVE hardware
>    with MaxVectorSize=16/32/64.

Marked as reviewed by ngasson (Reviewer).

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

PR: https://git.openjdk.java.net/jdk/pull/4122