gistfile1.asm

; find the maximum number in a list
;
; variables
; edi - Holds the index of the array
; ebx - Largest number
; eax - Current element

section .data

array:
    dd 3,67,342,222,45,75,54,34,44,33,22,11,66,0

section .text
global _start

_start:
    mov edi, 0 ; set the index to 0
    mov eax, [edi * 4 + array] ; set eax to the first element
    mov ebx, eax ; set the max to the first element to start with

start_loop:
    cmp eax, 0 ; see if we're at the last element, 0
    je loop_exit ; if we are, jump to the loop exit
    inc edi ; increment the index
    mov eax, [edi * 4 + array] ; set the current element to the new element
    cmp eax, ebx ; compare eax to ebx
    jle start_loop ; if the new element is less than the max, continue the looping
    mov ebx, eax ; otherwise set the new max to the current element
    jmp start_loop ; whether or not we executed the previous instruction, we
    ; still need to go back to the beginning of the loop

loop_exit: ; return the max element using the exit system call
    mov eax, 1 ; set the system call to exit (1)
    int 80h ; ebx is already set to the max element