Microprocessor/Codes/Practical-3.2 (without string).asm

; THIS CODE HAS BEEN TESTED AND IS FULLY OPERATIONAL.

; Problem Statement: Write X86/64 ALP to perform non-overlapped block transfer (WITHOUT string specific instructions). Block containing data can be defined in the data segment.

; Code from Microprocessor (SPPU - Second Year - Computer Engineering - Content) repository on KSKA Git: https://git.kska.io/sppu-se-comp-content/Microprocessor/


; BEGINNING OF CODE
%macro print 2
mov rax,1
mov rdi,1
mov rsi,%1
mov rdx,%2
syscall
%endmacro

section .data
m1 db 10,"Source block:",10,13
m1len equ $-m1

m2 db 10,"Destination block after transfer:",10,13
m2len equ $-m2

space db"  "
spacelen equ $-space

srcblk db 10h,20h,30h,40h,50h     

count equ 05h                     

section .bss
ans resb 4                        
dstblk resb 5

section .text
global _start
_start:
print m1,m1len
mov rsi,srcblk
call disp_block

print m2,m2len

mov rsi,srcblk
mov rdi,dstblk
mov rcx,05

s1:    mov al,[rsi]
mov [rdi],al
inc rsi
inc rdi
loop s1

mov rsi,dstblk
call disp_block

mov rax,60
xor rdi,rdi
syscall

disp_block:
mov rbp,count
back:mov al,[rsi]
push rsi
call disp_8
print space,1
pop rsi
inc rsi
dec rbp
jnz back
ret

disp_8:mov rsi,ans

mov bl,al
mov dl,bl
rol dl,04
and dl,0fh
cmp dl,09h
jbe add30
add dl,07h

add30:
add dl,30h
mov [rsi],dl
inc rsi

mov dl,bl
and dl,0fh
cmp dl,09h
jbe add130
add dl,07h

add130:

add dl,30h
mov [rsi],dl

print ans,2
ret
; END OF CODE