public NetBigInteger Multiply(
NetBigInteger val)
{
if (m_sign == 0 || val.m_sign == 0)
return Zero;
if (val.QuickPow2Check()) // val is power of two
{
NetBigInteger result = ShiftLeft(val.Abs().BitLength - 1);
return val.m_sign > 0 ? result : result.Negate();
}
if (QuickPow2Check()) // this is power of two
{
NetBigInteger result = val.ShiftLeft(Abs().BitLength - 1);
return m_sign > 0 ? result : result.Negate();
}
int maxBitLength = BitLength + val.BitLength;
int resLength = (maxBitLength + BitsPerInt - 1) / BitsPerInt;
int[] res = new int[resLength];
if (val == this)
{
Square(res, m_magnitude);
}
else
{
Multiply(res, m_magnitude, val.m_magnitude);
}
return new NetBigInteger(m_sign * val.m_sign, res, true);
}
