O‘zbekiston respublikasi oliy va o’rta maxsus ta’lim vazirligi mirzo Ulug‘bek nomidagi O‘zbekiston milliy universiteti Jizzax filiali Informatika va axborot texnalogiyalari 103-19 gurux talabasi Jo’raboyev Haydarning mustaqil ishi

Amaliy yechish uchun masalalar

1-masala. Quyida assembler tilida berilgan dastur kodini C++ tiliga o’giring.

%include"d:\nasm-io.inc"

section .bss

x resd 1

section .data

y dd 100

a dd 0

b dd 1

section .text

global _main

_main:

mov eax,[y]

cmp eax,0

jle aa

chop_et '%i',[b]

jmp tamom

aa: chop_et '%i',[a]

tamom:

ret

2-masala.Quyida assembler tilida berilgan kodni ishlash natijaisni ko’rsating. Bu dastur qanday masalani hal etadi? (20%).

%include "d:\nasm-io.inc"

section .bss

x resd 1

section .text

global _main

_main:

qabul_qil '%i',x

mov eax,[x]

cmp eax,0

jge s

neg eax

chop_et '%i',eax

jmp tamom

s: chop_et '%i',eax

tamom:

ret

3-masala. Quyida C++ tilida dastur qismi berilgan. Shu dastur qismiga mos assembler dastur kodini keltiring (20%).

short int a=10;

int b=20,c;

c=a+b

Javoblar:

1-masala

#include

using namespace std;

int main()

{

int x=100;

cout<< (x>0)?x:0 ;

return 0;

}

2-masala

%include "nasm-io.inc"

section .bss

x resd 1

section .text

global _main

_main:

qabul_qil '%i',x

mov eax,[x]

cmp eax,0

jge s

neg eax

chop_et '%i',eax

jmp tamom

s: chop_et '%i',eax

tamom:

ret

Bu yerda: mov eax,[x]- x o’zgaruvchini eax registriga taminlanayapti, cmp eax,0 – eax regitridagi qiymatni 0 bilan solishtiryapmiz, jge s -agar x<0 sharti bajarilsa, s ga o’tadi. neg eax – eax registridagi qiymatni teskarisiga almashtiradi.Demak, shunday xulosa qilishimiz mumkinki, bu dastur taqqoslash natijasini teskari ishorasi bilan chop etadi.

3-masala

short int a=10;

int b=20,c;

c=a+b

Assembler tilida

%include "nasm-io.inc"

section .bss

a resd 4

b db 2

c db 4

section .text

global _main

_main:

chop_et 'Ikkita son kiririting:'

qabul_qil '%i %i',a,b

mov eax,[a] ;; eax=a

mov ecx,[c] ;; ecx=c

mov ebx,[b] ;; ebx=b

add ecx,[b] ;; ecx=ecx+b

add ecx,[a] ;; ecx=ecx+a

chop_et 'Natija: %i+%i=%i %i',[a],[b],c,ecx

ret