return x;
        } else {
          return (long) x - 1;
        }

      case CEILING:
        if (x <= 0.0 || isMathematicalInteger(x)) {
          return x;
        } else {
          return (long) x + 1;
        }

      case DOWN:
        return x;

      case UP:
        if (isMathematicalInteger(x)) {
          return x;
        } else {

      tmp += Double.doubleToRawLongBits(DoubleMath.factorial(factorials[j]));
    }
    return tmp;
  }

  @Benchmark
  int isMathematicalInteger(int reps) {
    int tmp = 0;
    for (int i = 0; i < reps; i++) {
      int j = i & ARRAY_MASK;
      if (DoubleMath.isMathematicalInteger(doubles[j])) {
        tmp++;
      }
    }
    return tmp;
  }

  @Benchmark
  int isPowerOfTwo(int reps) {

      tmp += Double.doubleToRawLongBits(DoubleMath.factorial(factorials[j]));
    }
    return tmp;
  }

  @Benchmark
  int isMathematicalInteger(int reps) {
    int tmp = 0;
    for (int i = 0; i < reps; i++) {
      int j = i & ARRAY_MASK;
      if (DoubleMath.isMathematicalInteger(doubles[j])) {
        tmp++;
      }
    }
    return tmp;
  }

  @Benchmark
  int isPowerOfTwo(int reps) {

    }
    return trueLog2;
  }

  @GwtIncompatible // DoubleMath.isMathematicalInteger
  public void testIsMathematicalIntegerIntegral() {
    for (double d : INTEGRAL_DOUBLE_CANDIDATES) {
      assertTrue(DoubleMath.isMathematicalInteger(d));
    }
  }

  @GwtIncompatible // DoubleMath.isMathematicalInteger
  public void testIsMathematicalIntegerFractional() {

    }
    return trueLog2;
  }

  @GwtIncompatible // DoubleMath.isMathematicalInteger
  public void testIsMathematicalIntegerIntegral() {
    for (double d : INTEGRAL_DOUBLE_CANDIDATES) {
      assertTrue(DoubleMath.isMathematicalInteger(d));
    }
  }

  @GwtIncompatible // DoubleMath.isMathematicalInteger
  public void testIsMathematicalIntegerFractional() {