greaterInDiagonal.s

/* Assembly AT&T */

  .text

  .global greaterInDiagonal_s

greaterInDiagonal_s:
  push %ebp
  mov %esp,%ebp


  xor %edx, %edx
  xor %eax, %eax
  xor %ecx, %ecx
  mov 8(%ebp), %ecx   /* L */


  mov 8(%ebp), %edx
  mov $1,%eax
  add %ecx, %eax     /* ax = L+1 */
  add %eax, %eax
  add %eax, %eax     /* eax = 4*(L+1) , int = 4 bytes */

  dec %ecx           /* L-1 */
  mov %eax, %esi     /* reference to 4*(L+1) */

  mov 12(%ebp),%ebx  /* adress of matrix's first element */
  xor %edi, %edi

loop:
    /*  counter ecx L-1 ~ 0  */
    mov %esi,%eax
    mul %ecx
    cmp (%ebx,%eax), %edi    /* compare current max value */
    ja continue                /* if not, doesn't change the current max value */
    mov (%ebx,%eax), %edi    	   /* else...change it */
    continue:
    dec %ecx
jns loop  /* loop l times */

  mov %edi,%eax
  mov %ebp,%esp
  pop %ebp
  ret