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

[Lutz Schmidt]

> 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

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7324/files
  - new: https://git.openjdk.java.net/jdk/pull/7324/files/3f78a84c..2094825b

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7324&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7324&range=00-01

  Stats: 46 lines in 2 files changed: 13 ins; 23 del; 10 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7324.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7324/head:pull/7324

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