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

[Ningsheng Jian]

On Mon, 19 Apr 2021 06:26:02 GMT, Wang Huang <whuang at openjdk.org> wrote:

>> src/hotspot/cpu/aarch64/aarch64_sve.ad line 4080:
>> 
>>> 4078:   %}
>>> 4079:   ins_pipe(pipe_slow);
>>> 4080: %}
>> 
>> At least merge `long/double` and `float/int` ? The format looks the same.
>
> I think it's my fault. The comment is `L` for `rearrangeL` instead of `D`. I will fix it in my next patch.

I also prefer merging them instead of having two separate rules. From the instruction point of view, there's only D, not L.

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