Substring stringa

# Program koji provjerava da li se string_2 nalazi u string_1
# dmarjanovic

.section .data
    string_2: .ascii "nmar\0"
    string_1: .ascii "dragutinmarjanovic\0"
.section .text
.globl main

main:

    # Brojac za string_1
    movl $0, %esi
    # Brojac za string_2
    movl $0, %ebx

for_string:

    cmpb $0, string_2(,%ebx,1)
    je substr_true

    cmpb $0, string_1(,%esi,1)
    je substr_false

    movb string_2(,%ebx,1), %cl
    cmpb string_1(,%esi,1), %cl
    je maybe_substr

    incl %esi
    movl $0, %ebx
    jmp for_string

    maybe_substr:
        incl %esi
        incl %ebx
        jmp for_string

substr_true:
    movl $2, %eax
    jmp end

substr_false:
    movl $-2, %eax

end:
    movl $1, %eax
    int $0x80