RFR: 8263649: AArch64: update cas.m4 to match current AD file [v3]

[Andrew Haley]

On Tue, 23 Mar 2021 07:34:08 GMT, Nick Gasson <ngasson at openjdk.org> wrote:

>> There's a block of code in aarch64.ad that was generated from cas.m4 and
>> is surrounded by:
>> 
>>   // BEGIN This section of the file is automatically generated. Do not edit --------------
>> 
>> However this section has been modified several times since it was
>> generated and no longer matches the output of the M4 file. This patch
>> updates cas.m4 to reflect the current code.
>
> Nick Gasson has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix comment

Thanks for fixing this. Great work.

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Marked as reviewed by aph (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/3045