if !exact {
			return a.AsDec().Cmp(b.AsDec())
		}
		if result == a.value {
			switch {
			case remainder == 0:
				return 0
			case remainder > 0:
				return -1
			default:
				return 1
			}
		}
		b.value = result
	default:
		result, remainder, exact := divideByScaleInt64(a.value, b.scale-a.scale)
		if !exact {
			return a.AsDec().Cmp(b.AsDec())
		}
		if result == b.value {

		{"1.", decQuantity(1, 0, DecimalSI)},
		{"1.G", decQuantity(1, 9, DecimalSI)},
	}

	for _, asDec := range []bool{false, true} {
		for _, item := range table {
			got, err := ParseQuantity(item.input)
			if err != nil {
				t.Errorf("%v: unexpected error: %v", item.input, err)
				continue
			}
			if asDec {
				got.AsDec()
			}

			if e, a := item.expect, got; e.Cmp(a) != 0 {

func (q *Quantity) ToDec() *Quantity {
	if q.d.Dec == nil {
		q.d.Dec = q.i.AsDec()
		q.i = int64Amount{}
	}
	return q
}

// AsDec returns the quantity as represented by a scaled inf.Dec.
func (q *Quantity) AsDec() *inf.Dec {
	if q.d.Dec != nil {
		return q.d.Dec
	}
	q.d.Dec = q.i.AsDec()
	q.i = int64Amount{}
	return q.d.Dec
}