RFR: 8259948: Aarch64: Add cast nodes for Aarch64 Neon backend [v2]

[Wu Yan]

On Wed, 4 Aug 2021 10:12:28 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> src/hotspot/cpu/aarch64/assembler_aarch64.hpp line 2047:
>> 
>>> 2045:     rf(Rn, 5), rf(Rd, 0);
>>> 2046:   }
>>> 2047: 
>> 
>> This instruction is part of "AdvSIMD two-reg misc" along with things like fsqrt. Please put it there with the other instructions using the same encoding, and please using the existing logic.
>
> And given that it has a different name from Arm's name, please add a comment for the reader.

Thanks, fixed it.

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