[vectorIntrinsics] RFR: 8265321: Add Rearrange nodes implementation for Arm SVE

[Ningsheng Jian]

On Mon, 19 Apr 2021 08:24:45 GMT, Wang Huang <whuang at openjdk.org> wrote:

>> Agree with @nsjian . I prefer to merge all these rules into one as we have discussed too much times before, as there is no instruction difference for different types.  Anyway, we can have a separate patch to unify the styles in ad file.
>
>> Some cases are different, but I don't think we need to distinguish floating point data types for this operation as they are actually the same thing and generate the same code.
> 
> Yes, I think for this rule `L` and `D` have the same form. However, the comment itself should be consistent with others. In other case, we should distinguish floating point data types. That is why I choose to use `L` instead of `D`.

If you really want to have a correct comment, you can comment as something like "(L/D)" - though I doubt if it really make any sense for your testing/debugging.

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PR: https://git.openjdk.java.net/panama-vector/pull/70