public static bool Diff(uint[] x, int xOff, uint[] y, int yOff, uint[] z, int zOff) { bool flag = Nat192.Gte(x, xOff, y, yOff); if (flag) { Nat192.Sub(x, xOff, y, yOff, z, zOff); } else { Nat192.Sub(y, yOff, x, xOff, z, zOff); } return(flag); }