return (VM_ObjectModel.readAvailableBitsWord(ref)& MARK_BIT_MASK) != value;
return (VM_ObjectModel.readAvailableBitsWord(ref) & MARK_BIT_MASK) == value;
  static public boolean testMarkBit(Object ref, int value)    throws VM_PragmaUninterruptible, VM_PragmaInline {    return (VM_ObjectModel.readAvailableBitsWord(ref)& MARK_BIT_MASK) != value;  }