tree 442b651d6623eefd5be4b9f4d940b16d107fcb9d
parent afbb15209f9dd248ceb9a222cd4dd52dc473884a
author Ulya Trafimovich <skvadrik@google.com> 1641911513 +0000
committer Ulya Trofimovich <skvadrik@google.com> 1642163387 +0000

x86_64: 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   1.333    0.009
  UnsafeCompareAndSetFieldString         1.336    0.009

Bug: 71781600
Test: ART_HEAP_POISONING=true m build-art-host-tests \
        && art/test.py --host -r -t 712-varhandle-invocations --64
Change-Id: I19a5dc15304693016c7b93294dafae4a90606cff