CY768013A - Interrupt coding problem

Hi frnds,

I am working on Cypress EZ-USB CY768013A while analyzing the code i found many interrupts with same interrupt number as " interrupt 0 " , though this EZ Cypress usb chip has AUTOVECTOR facility, I would like to know how all these interrupt functions are executed with same Interrupt number in EZ CYPRESS USB chip ???

void ISR_Sudav(void) interrupt 0
{
   printf("Data\n");
   GotSUD = TRUE;            // Set flag
   EZUSB_IRQ_CLEAR();
   USBIRQ = bmSUDAV;         // Clear SUDAV IRQ
}

// Setup Token Interrupt Handler
void ISR_Sutok(void) interrupt 0
{
   printf("Token\n");
   EZUSB_IRQ_CLEAR();
   USBIRQ = bmSUTOK;         // Clear SUTOK IRQ
}

void ISR_Sof(void) interrupt 0
{
   printf("SOF\n");
   EZUSB_IRQ_CLEAR();
   USBIRQ = bmSOF;            // Clear SOF IRQ
}

void ISR_Ures(void) interrupt 0
{
        printf("Ureq\n");
   if (EZUSB_HIGHSPEED())
   {
          pConfigDscr = pHighSpeedConfigDscr;
      pOtherConfigDscr = pFullSpeedConfigDscr;
   }
   else
   {
      pConfigDscr = pFullSpeedConfigDscr;
      pOtherConfigDscr = pHighSpeedConfigDscr;
   }

   EZUSB_IRQ_CLEAR();
   USBIRQ = bmURES;         // Clear URES IRQ
}

void ISR_Susp(void) interrupt 0
{
   printf("Sup");
   Sleep = TRUE;
   EZUSB_IRQ_CLEAR();
   USBIRQ = bmSUSP;
}