commit a3759ca5d8fd80cb1cf0856dd128f9a92c4c12f6
author Ulya Trafimovich <skvadrik@google.com> Fri Jan 14 15:53:42 2022 +0000
committer Ulya Trofimovich <skvadrik@google.com> Mon Jan 17 14:52:07 2022 +0000
tree e5e1b92e09387793e128a791f0c6bdb21a3f49b3
parent 70102e618a82c41c0e0c790db6959bc58d4837de

arm: Implement Unsafe.compareAndSetObject intrinsic.

The implementation is the same as Unsafe.compareAndSwapObject, as the
latter operation has compare-and-set semantics.

Benchmarks improvements (using benchmarks provided by
https://android-review.googlesource.com/1420959):

  benchmark                              before   after
  -----------------------------------------------------
  UnsafeCompareAndSetStaticFieldString   4.209    0.027
  UnsafeCompareAndSetFieldString         4.212    0.025

Bug: 71781600
Bug: 202868177
Test: art/test.py --target -r -t 712-varhandle-invocations
Change-Id: Ib6f071d5bc118018bec36204718ba0089df13302