problem in using arrey & ADC using 16f777

[kappa_am]

hi,
I have written following program to convert ten analog inputs to digital signals, and put appropriate output regarding to comparison with REF signal (not determined yet). we use pin Vref- and Vref+ (AN2 & AN3) as voltage reference and AN12 pin as external interrupt.
when I use two dimensional signal "if state", the simulation shows that program execution time increase drastically,while it is just a 3*3 matrix.
I would be grateful if you help me in this respect. it also is appreciated if you take a look at the code and mention its defects.

Thank you

   unsigned int ADRES;
   unsigned short OUTM[3];
   unsigned short ph, cap, cap2;
   unsigned short REFC[3][3];
   unsigned char ADL_byte, ADH_byte;
   unsigned int ADR;
interrupt(void) {
unsigned short rep;
if (INTCON.INTF)
{
INTCON.INTF=0;
rep=0;
rep=(PORTB.B7<<1)|PORTB.B6;
 PORTD= (OUTM[rep]<<2) | rep;
}
}
 unsigned int ADREAD(unsigned char channel){
   if(channel.B3 != 0){
    channel.B3=0;
    ADCON0=0x83 | (channel<<3);
     }
   else
   { ADCON0=0x81 | (channel<<3);
    }
   // delay_us(20)
   GO_DONE_BIT=1;
   while(GO_DONE_BIT);
   ADL_byte=ADRESL;
   ADH_byte=ADRESH;
   ADR=(ADH_byte<<8)| ADL_byte;
   return ADR;
   }
void main() {
  OPTION_REG= 0xc7;
  INTCON=0x90;
  CMCON=7;
  ADCON1=0xB0;
  ADCON2=0x30;
  TRISD=0x00;
  PORTD=0x00;
  while(1)
  {
    cap2=0  ;
  for (ph=0; ph<3; ph++)
   {
    for (cap=0; cap<3; cap++)
    { if (ph==0 || cap>1) cap2=cap2+2;
      ADRES=ADREAD(cap2);
      ADRES=ADRES>>2;
      if(ADRES<REFC[ph][cap]) OUTM[ph] |= (1<<cap);
      else if(ADRES>REFC[ph][cap]) OUTM[ph]&= ~(1<<cap) ;
      else OUTM[ph] |= (1<<(cap+3))=1;
      cap2+=1 ;
     }
   }
  }
  }