RFR: 8356949: AArch64: Tighten up template interpreter method entry code [v3]

[Chad Rakoczy]

> [JDK-8356949](https://bugs.openjdk.org/browse/JDK-8356949)
> 
> This change is the aarch64 version of [JDK-8352415](https://bugs.openjdk.org/browse/JDK-8352415). 
> 
> To improve interpreter performance, which is important for faster startup, the method entry code was refactored to reuse some memory accesses and also spread them out to allow more latency-hiding hardware mechanisms to kick in.
> 
> Additional testing:
> 
> - [x] Ad-hoc -Xint benchmarks
> - [x] Linux aarch64 server fastdebug, tier 1/2/3/4

Chad Rakoczy has updated the pull request incrementally with one additional commit since the last revision:

  Style updates

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25312/files
  - new: https://git.openjdk.org/jdk/pull/25312/files/d7035ab7..26689b30

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25312&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25312&range=01-02

  Stats: 16 lines in 1 file changed: 1 ins; 3 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/25312.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25312/head:pull/25312

PR: https://git.openjdk.org/jdk/pull/25312