RFR: 8258953: AArch64: move NEON instructions to aarch64_neon.ad [v2]

[Ningsheng Jian]

On Sun, 7 Feb 2021 07:57:57 GMT, Dong Bo <dongbo at openjdk.org> wrote:

>> As discussed in [1], all NEON instructions should be moved from `aarch64.ad` to `aarch64_neon.ad`.
>> 
>> In the first commit [2] of this PR, the NEON instructions are deleted from `aarch64.ad` and appended to `aarch64_neon.ad`.
>> I compared the generated code in `aarch64_neon.ad` with original code in `aarch64.ad`, no suspicious differences found.
>> The last two commits just simply move code around in `aarch64_neon.ad` to put related instructions together, i.e. `LoadStore` [3], `Reduction` [4].
>> 
>> This also supports vector length 4 for `vsraa8B_imm` and `vsrla8B_imm`, vector length 2 for `vsraa4S_imm` and `vsrla4S_imm`, fixes few typos, e.g. `vor8B`, `vsrla4S_imm`.
>> 
>> [1] https://github.com/openjdk/jdk/pull/1215#issuecomment-728186803
>> [2] https://github.com/dgbo/jdk/commit/40cbe99e647cdf93712edf8f77ab3b5b30ea0a95
>> [3] https://github.com/dgbo/jdk/commit/695fb8f8ef009b733a8f804e791347f4bfe2572e
>> [4] https://github.com/dgbo/jdk/commit/e0c38aa9aaa6af9925a3821328384b1e2b2c2070
>
> Dong Bo has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:
> 
>   8258953: AArch64: move NEON instructions to aarch64_neon.ad

I compared all-ad-src.ad with and without the patch, and it looked good to me.

-------------

Marked as reviewed by njian (Committer).

PR: https://git.openjdk.java.net/jdk/pull/2273