RFR: 8342769: HotSpot Windows/gcc port is broken [v3]

[Julian Waters]

> Several areas in HotSpot are broken in the gcc port. These, with the exception of 1 rather big oversight within SharedRuntime::frem and SharedRuntime::drem, are all minor correctness issues within the code. These mostly can be fixed with simple changes to the code. Note that I am not sure whether the SharedRuntime::frem and SharedRuntime::drem fix is correct. It may be that they can be removed entirely

Julian Waters has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Merge branch 'openjdk:master' into hotspot
 - Revert sharedRuntime.cpp
 - Revert sharedRuntime_x86.cpp
 - 8342769

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21627/files
  - new: https://git.openjdk.org/jdk/pull/21627/files/12e82f68..fb171a43

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21627&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21627&range=01-02

  Stats: 487892 lines in 5573 files changed: 189586 ins; 262181 del; 36125 mod
  Patch: https://git.openjdk.org/jdk/pull/21627.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21627/head:pull/21627

PR: https://git.openjdk.org/jdk/pull/21627