public static void MultiplyAddToExt(ulong[] x, ulong[] y, ulong[] zz)
{
ulong[] array = Nat448.CreateExt64();
SecT409Field.ImplMultiply(x, y, array);
SecT409Field.AddExt(zz, array, zz);
}
public static void SquareAddToExt(ulong[] x, ulong[] zz)
{
ulong[] array = Nat.Create64(13);
SecT409Field.ImplSquare(x, array);
SecT409Field.AddExt(zz, array, zz);
}