tree 03766b8b7fe4172c7421ea863ecbf03fcdf1ecd4
parent 27d4f33f6bb07c941f9082eb1b6d920540f98370
author Ulya Trafimovich <skvadrik@google.com> 1642173638 +0000
committer Ulya Trofimovich <skvadrik@google.com> 1642431127 +0000

arm64: Implement Unsafe.compareAndSetObject intrinsic.

Also fix a few copy-paste errors in comments for x86/x86_64.

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   3.908    0.014
  UnsafeCompareAndSetFieldString         3.917    0.014

Bug: 71781600
Bug: 202868177
Test: art/test.py --target -r -t 712-varhandle-invocations --64
Change-Id: I799f47210f8b70d6944418c05b985fe678f36208