RFR: 8281079: [s390] Unify Address Operand Encoding in Instruction Emitters [v2]

[Lutz Schmidt]

On Thu, 24 Feb 2022 14:39:48 GMT, Lutz Schmidt <lucy at openjdk.org> wrote:

>> May I please request reviews for this cleanup and unification change. It streamlines the address operand emitters for all instructions. As such, the modifications are widespread and may be cumbersome to review. Please ask questions if anything is unclear.
>> 
>> SAP does not maintain a full s390x build and test environment any longer. I would therefore very much appreciate if somebody would run a build and test cycle on s390x. 
>> 
>> As this is a s390x-only change, other platforms are not impacted.
>
> Lutz Schmidt has updated the pull request incrementally with one additional commit since the last revision:
> 
>   changes to satisfy review comments

Thank you, Martin, for your review. 
I will perform testing to the best of my abilities.
For formal testing, I have to rely on @backwaterred

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PR: https://git.openjdk.java.net/jdk/pull/7324