double2_add double2_eq double2_in double2_out double2_recv double2_send double2_set double3_add double3_eq double3_in double3_out double3_recv double3_send double3_set double4_add double4_eq double4_in double4_out double4_recv double4_send double4_set tdouble2_in tdouble3_in tdouble4_in

double2_add() double2* double2_add ( double2 *  d1, double2 *  d2  ) Returns the addition of the double2 values.