examples.asm

; conditional statements examples; so called "if"
mov eax, 4

; if(eax<=3)
cmp eax,3
jle if_true_label

; if(eax<4)
cmp eax,4
jl if_true_label

; if(eax==4)
cmp eax,4
je if_true_label


jmp end_ifs_label

if_true_label:
nop

end_ifs_label:
nop



; stos; push; pop
push 10
pop eax
; now: eax == 10

; stack used to swap registers
mov eax, 5
mov ecx, 8
; swap(eax, ecx)
push eax
push ecx
pop eax
pop ecx
; now:
; eax == 8
; ecx == 5


; loop example
; for(eax=0;eax<4;eax++)
; 	ecx = eax + ecx
xor ecx,ecx 	; ecx = 0
xor eax,eax   	; cx-register is the counter, set to 0; eax = 0
loop1:			; etykietka, do ktorej skaczemy (poczatek petli)
add ecx,eax		; exc += eax
inc eax      	; Increment ; eax++
cmp eax,4    	; Compare eax to the limit ; 
jl loop1   	; Loop while less or equal ; if eax < 4 ; Jump If Less


; switch(eax)
;   case 4: ecx -= edx; break;
;   case 7: ecx = aex + ebx; break;
;   default: ecx = 0;

cmp eax,4
je case4

cmp eax,7
je case7

jmp default

nop

case4:
sub ecx, edx
jmp break

case7:
mov ecx,eax
add ecx,ebx
jmp break

default:
xor ecx, ecx ; ecx = 0

break:
nop