RFR: 8259948: Aarch64: Add cast nodes for Aarch64 Neon backend [v4]

[Wu Yan]

On Mon, 6 Sep 2021 07:29:41 GMT, Ningsheng Jian <njian at openjdk.org> wrote:

>> "fcvtzs" has been used here: 
>> https://github.com/openjdk/jdk/blob/c640fe42c2b5e6668a2a875678be44443942c868/src/hotspot/cpu/aarch64/assembler_aarch64.hpp#L2030
>
>> "fcvtzs" has been used here:
>> https://github.com/openjdk/jdk/blob/c640fe42c2b5e6668a2a875678be44443942c868/src/hotspot/cpu/aarch64/assembler_aarch64.hpp#L2030
> 
> But that's the scalar version, and have different input arguments?

OK, I'll fix it.

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PR: https://git.openjdk.java.net/jdk/pull/4839