[vectorIntrinsics] RFR: 8265817: Add LoadVectorGather nodes implementation for Arm SVE

[Wang Huang]

On Sun, 25 Apr 2021 08:41:00 GMT, Xiaohong Gong <xgong at openjdk.org> wrote:

> Actually this does not strongly depends on the mask feature support for SVE. And we already have the partial implementation that are merged into the panama-vector. I think you can have them as the reference. Thanks!

OK. I will check that after implementation of all missing nodes. Thank you.

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PR: https://git.openjdk.java.net/panama-vector/pull/72