public static void AddExt(uint[] xx, uint[] yy, uint[] zz)
{
uint c = Nat224.AddExt(xx, yy, zz);
if (c != 0 || (zz[13] == PExt13 && Nat224.GteExt(zz, PExt)))
{
Nat224.SubExt(zz, PExt, zz);
}
}
public static void SubtractExt(uint[] xx, uint[] yy, uint[] zz)
{
int c = Nat224.SubExt(xx, yy, zz);
if (c != 0)
{
Nat224.AddExt(zz, PExt, zz);
}
}