global _start
_start :

section .text

%macro disp_macro 2
mov rax,1
mov rdi,1
mov rsi,%1
mov rdx,%2
syscall
%endm

disp_macro msg1,len1
mov rsi,sarr
l1:mov al,[rsi]
push rsi
call display
disp_macro msg3,len3
pop rsi
inc rsi
dec byte[cnt]
jnz l1

;displaying over block
disp_macro msg2,len2
std
mov rsi,sarr
mov rdi,sarr
add rsi,09
add rdi,13
mov rcx,0Ah;
rep movsb
;actual display after overlap
mov rsi,sarr
l3:mov al,[rsi]
push rsi
call display
disp_macro msg3,len3
pop rsi
inc rsi
dec byte[cnt1]
jnz l3

;mov rsi,sarr
;mov rdi,sarr
;l4:mov al,[rsi]
;mov [rdi],al
;inc rsi
;dec rdi
;dec byte[cnt2]
;jnz l4

%macro exitm 0
mov rax,60
mov rdi,0
syscall
%endm

exitm

display:
mov rsi,disparr+1
mov rcx,02

a2:mov rdx,0
mov rbx,10H
div rbx
cmp dl,09H
jbe a1
add dl,07h

a1:add dl,30H
mov[rsi],dl
dec rsi
dec rcx
jnz a2

disp_macro disparr,02

ret

section .data
msg1 db "The Array before overlap is: ",0Ah
len1 equ $-msg1

msg3 db "",0Ah
len3 equ $-msg3

sarr db 01h,02h,03h,04h,05h,06h,07h,08h,09h,0Ah,0Bh,0Ch,0Dh,0Eh,0Fh

msg2 db "the array after overlap is ",0Ah
len2 equ $-msg2

cnt db 15
cnt1 db 15
cnt2 db 15

section .bss
disparr resb 64