for (double x : VALUES) {
        for (double y : VALUES) {
          aa.set(i, x);
          double z = aa.accumulateAndGet(i, y, Double::max);
          double expectedMax = max(x, y);
          assertBitEquals(expectedMax, z);
          assertBitEquals(expectedMax, aa.get(i));
        }
      }
    }
  }

  /** getAndUpdate adds given value to current, and returns previous value */