[vectorIntrinsics+mask] Integrated: 8264563: Add masked vector intrinsics for binary/store operations

[Xiaohong Gong]

On Fri, 2 Apr 2021 09:27:07 GMT, Xiaohong Gong <xgong at openjdk.org> wrote:

> Hi, this is the basic masking support PR for Vector API mask operations on platforms like SVE/AVX-512. The main codes are from [1], which contains:
> 
> - The predicate register allocation for Arm SVE, and vector mask type definition.
> - The basic optimization for parts of the mask operations with masking feature. It contains:   
>  
>   1. Vector API java implementation changes for masked binary/store.
>   2. C2 compiler mid-end changes, including new vector intrinsics implementation and mask IRs.
> 
> Note that for easier discussion, this PR only provides the changes for limited masked operations (e.g. binary/store) and the mask generations (e.g. load/compare/maskAll). We will continue working on the following missing parts:
> 
> - Mask support for other operations (unary,ternary,reduction,load,etc.)
> - More mask IRs implementation (and/or/xor, toVector, allTrue, anyTrue, trueCount, eq, etc)
> - Vector boxing/unboxing support for mask type (deoptimization support for predicate registers)
> 
> Also note that this PR doesn't contain any backend implementations. So the blend pattern will be generated as before. Regarding to the AArch64 SVE backend support, we will create a separate PR based on this one in future.
>   
> [1] https://github.com/openjdk/panama-vector/pull/40
> 
> See more details from:
> http://cr.openjdk.java.net/~xgong/rfr/mask/Vector%20API%20masking%20support%20proposal%20for%20Arm%20SVE.pdf
> http://cr.openjdk.java.net/~xgong/rfr/mask/VectorAPI%20masking%20support.pdf
> 
> Any suggestions and discussions are welcome! Thanks a lot!

This pull request has now been integrated.

Changeset: 3739cc84
Author:    Xiaohong Gong <xgong at openjdk.org>
URL:       https://git.openjdk.java.net/panama-vector/commit/3739cc849cac3c3237f6eaf3ff1f06f8befd80b5
Stats:     1973 lines in 53 files changed: 1569 ins; 249 del; 155 mod

8264563: Add masked vector intrinsics for binary/store operations

Co-authored-by: Ningsheng Jian <njian at openjdk.org>
Reviewed-by: jbhateja, sviswanathan, vlivanov, whuang

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PR: https://git.openjdk.java.net/panama-vector/pull/57