RFR: 8340843: [PPC64/s390x] Error: ShouldNotReachHere() in TemplateInterpreterGenerator::generate_math_entry after 8338694 [v2]

[Martin Doerr]

> [JDK-8338694](https://bugs.openjdk.org/browse/JDK-8338694) introduced `Interpreter::java_lang_math_tanh` which needs to be handled by the interpreter. Unfortunately, `SharedRuntime::dtanh` does not exist, so we need to fallback to the normal interpreter entry (as before JDK-8338694).

Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:

  Add s390 fix.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21168/files
  - new: https://git.openjdk.org/jdk/pull/21168/files/676e2700..bb63f682

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21168&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21168&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21168.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21168/head:pull/21168

PR: https://git.openjdk.org/jdk/pull/21168