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Daniel Cujba
2024-08-31 12:07:21 +03:00
commit 0b130ee18c
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Anul 1/Semestrul 1/ASC/Seminar 2/ex1/ex1.asm
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bits 32 ; assembling for the 32 bits architecture
; declare the EntryPoint (a label defining the very first instruction of the program)
global start
; declare external functions needed by our program
extern exit ; tell nasm that exit exists even if we won't be defining it
import exit msvcrt.dll ; exit is a function that ends the calling process. It is defined in msvcrt.dll
; msvcrt.dll contains exit, printf and all the other important C-runtime specific functions
; our data is declared here (the variables needed by our program)
segment data use32 class=data
a db 2
b db 2
c db 3
d db 4
x resb 1
; our code starts here
segment code use32 class=code
start:
; ...
mov al,[a]
add al,[b]
mul byte [c]
div byte [d]
mov [x],al
; exit(0)
push dword 0 ; push the parameter for exit onto the stack
call [exit] ; call exit to terminate the program
Anul 1/Semestrul 1/ASC/Seminar 2/ex2/ex2.asm
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bits 32 ; assembling for the 32 bits architecture
; declare the EntryPoint (a label defining the very first instruction of the program)
global start
; declare external functions needed by our program
extern exit ; tell nasm that exit exists even if we won't be defining it
import exit msvcrt.dll ; exit is a function that ends the calling process. It is defined in msvcrt.dll
; msvcrt.dll contains exit, printf and all the other important C-runtime specific functions
; our data is declared here (the variables needed by our program)
segment data use32 class=data
; ...
a db 10
b db 2
c db 3
d db 4
x resb 1
; our code starts here
segment code use32 class=code
start:
; ...
mov al,[b]
mul byte [c]
mov bl,[a]
mov bh,0
sub bx,ax
mov ax,bx
div byte [d]
mov [x],al
; exit(0)
push dword 0 ; push the parameter for exit onto the stack
call [exit] ; call exit to terminate the program
Anul 1/Semestrul 1/ASC/Seminar 2/ex3/ex3.asm
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bits 32 ; assembling for the 32 bits architecture
; declare the EntryPoint (a label defining the very first instruction of the program)
global start
; declare external functions needed by our program
extern exit ; tell nasm that exit exists even if we won't be defining it
import exit msvcrt.dll ; exit is a function that ends the calling process. It is defined in msvcrt.dll
; msvcrt.dll contains exit, printf and all the other important C-runtime specific functions
; our data is declared here (the variables needed by our program)
segment data use32 class=data
; ...
a db 10
b dw 2
c db 3
d db 4
x resw 1
; our code starts here
segment code use32 class=code
start:
; ...
mov ah,0
mov al,[a]
mul word [b]
mov bl,[d]
mov bh,0
div bx
mov bl,[c]
sub ax,bx
mov [x],ax
; exit(0)
push dword 0 ; push the parameter for exit onto the stack
call [exit] ; call exit to terminate the program
Anul 1/Semestrul 1/ASC/Seminar 2/ex4/ex4.asm
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bits 32 ; assembling for the 32 bits architecture
; declare the EntryPoint (a label defining the very first instruction of the program)
global start
; declare external functions needed by our program
extern exit ; tell nasm that exit exists even if we won't be defining it
import exit msvcrt.dll ; exit is a function that ends the calling process. It is defined in msvcrt.dll
; msvcrt.dll contains exit, printf and all the other important C-runtime specific functions
; our data is declared here (the variables needed by our program)
segment data use32 class=data
; ...
a db 10
b dw 2
c dd 3
d db 4
f dw 1
g dw 2
x dq 2
; our code starts here
segment code use32 class=code
start:
; ...
mov al,[a] ;AL=a
cbw ;AX=a
imul word [b] ;DX:AX=a*b
push dx ;stack: dx,
push ax ;stack: dx,ax
mov al,[d] ;AL=d
cbw ;AX=d
cwde ;EAX=d
mov ecx,[c] ;ECX=c
sub ecx,eax ;ECX=c-d
pop eax ;EAX=a*b , stack:
cdq ;EDX:EAX=a*b
idiv dword ecx ;EAX=(a*b)/(c-d)
mov ecx,eax ;ECX=(a*b)/(c-d)
mov ax,[f] ;AX=f
imul word [g] ;DX:AX=f*g
push dx ;stack: DX
push ax ;stack: DX,AX
pop eax ;EAX=f*g , stack:
add eax,ecx ;EAX=(a*b)/(c-d)+f*g
cdq ;EDX:EAX=(a*b)/(c-d)+f*g
add [x],eax
adc [x+4],edx
; exit(0)
push dword 0 ; push the parameter for exit onto the stack
call [exit] ; call exit to terminate the program
Anul 1/Semestrul 1/ASC/Seminar 2/ex5/ex5.asm
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bits 32 ; assembling for the 32 bits architecture
; declare the EntryPoint (a label defining the very first instruction of the program)
global start
; declare external functions needed by our program
extern exit ; tell nasm that exit exists even if we won't be defining it
import exit msvcrt.dll ; exit is a function that ends the calling process. It is defined in msvcrt.dll
; msvcrt.dll contains exit, printf and all the other important C-runtime specific functions
; our data is declared here (the variables needed by our program)
segment data use32 class=data
a dd 1
b db 1
c dw 1
d dw 1
x resd 1
; our code starts here
segment code use32 class=code
start:
mov ax,[a] ;AX=a-low
mov dx,[a+2] ;DX=a-high DX:AX=a-low
mov bx,2 ;BX=2
idiv bx ;AX=a/2
mov dx,ax ;DX=a/2
mov al,[b] ;AL=b
mov bl,3 ;BL=3
imul bl ;AX=b*3
add dx,ax
mov ax,[c]
imul word [d]
push dx
push ax
pop eax
mov eax,ecx
mov ax,dx
cwde
sub eax,ecx
add eax,100
mov [x],eax
; exit(0)
push dword 0 ; push the parameter for exit onto the stack
call [exit] ; call exit to terminate the program