{"8191.53125", ToNearestEven, 53, 'x', 5, "0x1.fff88p+12"},
		{"8191.53125", ToNearestAway, 53, 'x', 5, "0x1.fff88p+12"},
		{"8191.53125", ToZero, 53, 'x', 5, "0x1.fff88p+12"},
		{"8191.53125", AwayFromZero, 53, 'x', 5, "0x1.fff88p+12"},
		{"8191.53125", ToNegativeInf, 53, 'x', 5, "0x1.fff88p+12"},
		{"8191.53125", ToPositiveInf, 53, 'x', 5, "0x1.fff88p+12"},

		{"8191.53125", defaultRound, 53, 'x', 4, "0x1.fff8p+12"},

pkg log, func Output(int, string) error
pkg log, method (*Logger) SetOutput(io.Writer)
pkg math/big, const Above = 1
pkg math/big, const Above Accuracy
pkg math/big, const AwayFromZero = 3
pkg math/big, const AwayFromZero RoundingMode
pkg math/big, const Below = -1
pkg math/big, const Below Accuracy
pkg math/big, const Exact = 0
pkg math/big, const Exact Accuracy
pkg math/big, const MaxExp = 2147483647

const (
	ToNearestEven RoundingMode = iota // == IEEE 754-2008 roundTiesToEven
	ToNearestAway                     // == IEEE 754-2008 roundTiesToAway
	ToZero                            // == IEEE 754-2008 roundTowardZero
	AwayFromZero                      // no IEEE 754-2008 equivalent
	ToNegativeInf                     // == IEEE 754-2008 roundTowardNegative
	ToPositiveInf                     // == IEEE 754-2008 roundTowardPositive
)

			// try rounding down a little
			t.SetMode(big.ToZero)
			t.Set(x.val)
			if _, acc := t.Int(i); acc == big.Exact {
				return makeInt(i)
			}

			// try rounding up a little
			t.SetMode(big.AwayFromZero)
			t.Set(x.val)
			if _, acc := t.Int(i); acc == big.Exact {
				return makeInt(i)
			}
		}

	case complexVal:
		if re := ToFloat(x); re.Kind() == Float {
			return ToInt(re)
		}
	}