1                                  ; loopint2.asm  code loopint2.c for nasm 
     2                                  ; /* loopint2.c another simple loop that will be coded for nasm */
     3                                  ; #include <stdio.h>
     4                                  ; int main()
     5                                  ; {
     6                                  ;   int dd1[100];
     7                                  ;   int i;
     8                                  ;   dd1[0]=5; /* be sure loop stays 1..98 */
     9                                  ;   dd1[99]=9;
    10                                  ;   for(i=98; i>0; i--) dd1[i]=7; /* ONLY CHANGE !! */
    11                                  ;   printf("dd1[0]=%d, dd1[1]=%d, dd1[98]=%d, dd1[99]=%d\n",
    12                                  ;           dd1[0], dd1[1], dd1[98],dd1[99]);
    13                                  ;   return 0;
    14                                  ;}
    15                                  	section	.bss
    16 00000000 <res 00000190>          dd1:	resd	100
    17 00000190 <res 00000004>          i:	resd	1		; actually unused, kept in register
    18                                  
    19                                  	section .text
    20                                  	global main
    21 00000000 C705[00000000]0500-     main:	mov dword [dd1],5	; dd1[0]=5;
    22 00000008 0000               
    23 0000000A C705[8C010000]0900-     	mov dword [dd1+99*4],9	; dd1[99]=9;
    24 00000012 0000               
    25                                  
    26 00000014 B962000000              	mov ecx,98		; i=98; ecx is special for 'loop' instruction
    27 00000019 C7048D[00000000]07-     loop1:	mov dword [dd1+4*ecx],7	; dd1[i]=7;
    28 00000021 000000             
    29 00000024 E2F3                    	loop	loop1		; loop while i>0, decrements ecx
    30                                  	
    31                                          extern	printf		; the C function, to be called
    32                                          section .data		; Data section, initialized variables
    33 00000000 6464315B305D3D2564-     fmt:    db "dd1[0]=%d, dd1[1]=%d, dd1[98]=%d, dd1[99]=%d",10,0
    34 00000009 2C206464315B315D3D-
    35 00000012 25642C206464315B39-
    36 0000001B 385D3D25642C206464-
    37 00000024 315B39395D3D25640A-
    38 0000002D 00                 
    39                                  
    40                                  	section .text           ; Code section, continued
    41 00000026 FF35[8C010000]          	push	dword [dd1+99*4]	; dd1[99]
    42 0000002C FF35[88010000]                  push    dword [dd1+98*4]	; dd1[98]
    43 00000032 FF35[04000000]          	push	dword [dd1+4]	; dd1[1]
    44 00000038 FF35[00000000]                  push    dword [dd1]	; dd1[0]
    45 0000003E 68[00000000]                    push    dword fmt	; address of format string
    46 00000043 E8(00000000)                    call    printf		; Call C function
    47 00000048 83C414                          add     esp, 20		; pop stack 5 push times 4 bytes
    48                                  
    49 0000004B B800000000              	mov	eax,0		; normal, no error, return value
    50 00000050 C3                      	ret			; return 0;
    51                                  				; no registers needed to be saved