As described by Doug Lea here:
 http://mail.openjdk.java.net/pipermail/jmm-dev/2015-August/000185.html

Basically, it amounts to add two new flavors for each CAS, plus the weak CAS hierarchy:

    boolean compareAndSet(Object owner, T cmp, T val);
    boolean compareAndSetAcquire(Object owner, T cmp, T val);
    boolean compareAndSetRelease(Object owner, T cmp, T val);

    boolean weakCompareAndSet(Object owner, T cmp, T val);
    boolean weakCompareAndSetAcquire(Object owner, T cmp, T val);
    boolean weakCompareAndSetRelease(Object owner, T cmp, T val);