v_tally9 helper function for adding arrays with 9 elements

  vout[5] += vin[5];

}

static void v_tally9(double * const vout, const double * const vin)

{

  vout[0] += vin[0];

  vout[1] += vin[1];

  vout[2] += vin[2];

  vout[3] += vin[3];

  vout[4] += vin[4];

  vout[5] += vin[5];

  vout[6] += vin[6];

  vout[7] += vin[7];

  vout[8] += vin[8];

}

static void v_tally(double * const vout, const double scale, const double * const vin)

{

  vout[0] += scale*vin[0];