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diagonalsinterchange.asm
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section .data
space:db ' '
newline:db 10
msg: db 'cannot interchange'
len: equ $-msg
section .bss
nod: resb 1
counter: resw 1
counter1: resd 1
counter2: resd 1
num: resw 1
temp: resb 1
m: resw 1
n: resw 1
i: resw 1
j: resw 1
matrix: resw 100
section .text
global _start
_start:
mov word[counter],0
mov ecx,0
call read_num
mov cx,word[num]
mov word[m],cx
mov ecx,0
call read_num
mov cx,word[num]
mov word[n],cx
cmp cx,word[m]
jne end
mov eax,0
mov ebx,matrix
mov word[i],0
mov word[j],0
i_loop:
mov word[j],0
j_loop:
call read_num
mov dx,word[num]
mov word[ebx+2*eax],dx
inc eax
inc word[j]
mov cx,word[n]
cmp word[j],cx
jb j_loop
inc word[i]
mov cx,word[m]
cmp word[i],cx
jb i_loop
mov eax,0
mov edx,0
mov dword[counter1],eax
movzx eax,word[n]
dec eax
mov dword[counter2],eax
mov byte[counter],0
swap:
xor eax,eax
mov ebx,matrix
mov eax,dword[counter1]
mov cx,word[ebx+2*eax]
mov eax,dword[counter2]
mov dx,word[ebx+2*eax]
mov word[ebx+2*eax],cx
mov eax,dword[counter1]
mov word[ebx+2*eax],dx
inc word[counter]
movzx eax,word[n]
add dword[counter1],eax
add dword[counter1],1
movzx eax,word[n]
add dword[counter2],eax
dec dword[counter2]
mov cx,word[counter]
cmp cx,word[n]
jl swap
mov eax,0
mov ebx,matrix
mov word[i],0
mov word[j],0
i_loop1:
mov word[j],0
j_loop1:
mov dx,word[ebx+2*eax]
mov word[num],dx
cmp word[num],0
je print1
call print_num
pusha
mov eax, 4
mov ebx, 1
mov ecx, space
mov edx, 1
int 80h
popa
inc eax
inc word[j]
mov cx,word[n]
cmp word[j],cx
jb j_loop1
pusha
mov eax, 4
mov ebx, 1
mov ecx, newline
mov edx, 1
int 80h
popa
inc word[i]
mov cx,word[m]
cmp word[i],cx
jb i_loop1
mov eax,1
mov ebx,0
int 80h
read_num:
pusha
mov word[num], 0
loop_read:
mov eax, 3
mov ebx, 0
mov ecx, temp
mov edx, 1
int 80h
cmp byte[temp], 10
je end_read
mov ax, word[num]
mov bx, 10
mul bx
mov bl, byte[temp]
sub bl, 30h
mov bh, 0
add ax, bx
mov word[num], ax
jmp loop_read
end_read:
popa
ret
print_num:
pusha
extract_no:
cmp word[num], 0
je print_no
inc byte[nod]
mov dx, 0
mov ax, word[num]
mov bx, 10
div bx
push dx
mov word[num], ax
jmp extract_no
print_no:
cmp byte[nod], 0
je end_print
dec byte[nod]
pop dx
mov byte[temp], dl
add byte[temp], 30h
mov eax, 4
mov ebx, 1
mov ecx, temp
mov edx, 1
int 80h
jmp print_no
end_print:
popa
ret
print1:
add word[num],30h
pusha
mov eax, 4
mov ebx, 1
mov ecx, num
mov edx, 1
int 80h
mov eax, 4
mov ebx, 1
mov ecx, space
mov edx, 1
int 80h
popa
inc eax
inc word[j]
mov cx,word[n]
cmp word[j],cx
jb j_loop1
pusha
mov eax, 4
mov ebx, 1
mov ecx, newline
mov edx, 1
int 80h
popa
inc word[i]
mov cx,word[m]
cmp word[i],cx
jb i_loop1
mov eax,1
mov ebx,0
int 80h
end:
pusha
mov eax,4
mov ebx,1
mov ecx,msg
mov edx,len
int 80h
popa
mov eax,1
mov ebx,0
int 80h