floor method

DD floor()

Returns the largest (closest to positive infinity) value that is not greater than the argument and is equal to a mathematical integer. Special cases:

• If this value is NaN, returns NaN.

@return the largest (closest to positive infinity) value that is not greater than the argument and is equal to a mathematical integer.

Implementation

DD floor() {
  if (isNaN()) return NaN;
  double fhi = hi.floorToDouble();
  double flo = 0.0;
// Hi is already integral.  Floor the low word
  if (fhi == hi) {
    flo = lo.floorToDouble();
  }
// do we need to renormalize here?
  return new DD.withHiLo(fhi, flo);
}