RFR: 8331558: AArch64: optimize integer remainder [v3]

[Jin Guojie]

> On some Arm processors, a separate multiply/subtract is actually faster than the combined instruction.
> 
> (1) The following test has passed, which shows performance improvement.
> 
> make test TEST="micro:java.lang.IntegerDivMod"
> make test TEST="micro:java.lang.LongDivMod"
> 
> * IntegerDivMod.testDivideRemainderUnsigned baseline(ns/ops) 2223 with this pacth(ns/ops) 1885 improvement(%) 17.93%
> 
> * IntegerDivMod.testRemainderUnsigned baseline(ns/ops) 2225 with this pacth(ns/ops) 1885 improvement(%) 18.03%
> 
> * LongDivMod.testDivideRemainderUnsigned baseline(ns/ops) 2231 with this pacth(ns/ops) 1894 improvement(%) 17.79%
> 
> * LongDivMod.testRemainderUnsigned baseline(ns/ops) 2232 with this pacth(ns/ops) 1891 improvement(%) 18.03%
> 
> (2) jtreg test has passed
> 
> make run-test  TEST=tier1

Jin Guojie has updated the pull request incrementally with two additional commits since the last revision:

 - Merge branch 'dev0530' of https://github.com/jinguojie-alibaba/jdk into dev0530
 - MacroAssembler::msub() takes a scratch register as an argument

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19471/files
  - new: https://git.openjdk.org/jdk/pull/19471/files/21af82e4..73c7bdc0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19471&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19471&range=01-02

  Stats: 17 lines in 4 files changed: 2 ins; 0 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/19471.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19471/head:pull/19471

PR: https://git.openjdk.org/jdk/pull/19471