Averaging the ADC12 samples

Hi, I'm acquiring the analog signals uisng CCS430F5137 and I want to smooth them by averaging the ADC samples.

I found this similar threads

Averaging with 4 samples : http://e2e.ti.com/support/microcontrollers/msp430/f/166/t/19335.aspx

Averaging with 8 samples :http://e2e.ti.com/support/microcontrollers/msp430/f/166/t/148277.aspx

The implementation of 8 samples similar above is used with ADC12 instead of ADC10  but I am not getting anything on the hyperterminal.Is there anything I need to change to use ADC10 averaging code to work with ADC12

main
{

ADC channel settings()
while(1)
{
           VoltCalibrated = results[oldest];
	  for (i=0; i < 8; i++)
	  VoltMeasured[i] = VoltCalibrated;
	  VoltAverage = VoltCalibrated;
	  VoltMeasured[VoltMeasuredPosition++] =results[oldest];
	  if (VoltMeasuredPosition == 8)
	  VoltMeasuredPosition = 0;
	  VoltAverage = 0;
	  for (i = 0; i < 8; i++)
	  VoltAverage += VoltMeasured[i];
	  VoltAverage >>= 3; // Divide by 8 to get average
           UART_send(VoltAverage); 
	  ADC12CTL0 |= ADC12SC;  
    __bis_SR_register(CPUOFF + GIE);
  }
}

#pragma vector=ADC12_VECTOR 
__interrupt void ADC12ISR(void) 
{
  if (oldest >= Size) 
  {
        oldest =0; 
      }
    else
    {
  oldest = oldest +1; 
  }
  results[oldest] = ADC12MEM0;
  __bic_SR_register_on_exit(CPUOFF);
}

 I just have a doubt of how this works ( or what this will do) VoltAverage >>= 3; // Divide by 8 to get average

Can anyone suggest the changes for this.

Thanks.