 ;Write an X86/64 ALP to accept five 64 bit Hexadecimal numbers from
;user and store them in an array and display the accepted numbers.
;offset displacement of memory location from starting locatoin of segment
section .data;store initialize data
	msg1 db 10,13,"Enter 5 64 bit numbers" ;data base
	len1 equ $-msg1                        ;equation
	msg2 db 10,13,"Entered 5 64 bit numbers"
	len2 equ $-msg2

section .bss  ;declare uninitialized variable(  block lstarting symbol)
	array resd 200
	counter resb 1  ;when counter is 1 loop instruction execute 

section .text ;all instruction are store in .text (store all type of variable)
	global _start
	_start:

;display
	mov Rax,1  ; register  types 64 bit
	mov Rdi,1    ;register destination index for copy data
	mov Rsi,msg1  ;register source index for data source
	mov Rdx,len1
	syscall

;accept

mov byte[counter],05
mov rbx,00

		loop1:
			mov rax,0                  ; 0 for read
			mov rdi,0                  ; 0 for keyboard   
			mov rsi, array             ;move pointer to start of array
			add rsi,rbx               
			mov rdx,17                  
			syscall
         		add rbx,17                    ;to move counter
			dec byte[counter]
			JNZ loop1

;display
	mov Rax,1
	mov Rdi,1
	mov Rsi,msg2
	mov Rdx,len2
	syscall

;display
mov byte[counter],05
mov rbx,00
		loop2: 
			mov rax,1                    ;1 for write 
			mov rdi, 1                    ;1 for monitor
			mov rsi, array                
			add rsi,rbx
			mov rdx,17                   ;16 bit +1 for enter 
			syscall
			add rbx,17
			dec byte[counter]
			JNZ loop2

		;exit system call
		mov rax ,60
		mov rdi,0
		syscall

created 2 years ago

Assembly Online Compiler

Write, Run & Share Assembly code online using OneCompiler's Assembly online compiler for free. It's one of the robust, feature-rich online compilers for Assembly language. Getting started with the OneCompiler's Assembly compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as Assembly and start coding.

About Assembly

Assembly language(asm) is a low-level programming language, where the language instructions will be more similar to machine code instructions.

Every assembler may have it's own assembly language designed for a specific computers or an operating system.

Assembly language requires less execution time and memory. It is more helful for direct hardware manipulation, real-time critical applications. It is used in device drivers, low-level embedded systems etc.

Syntax help

Assembly language usually consists of three sections,

Data section

To initialize variables and constants, buffer size these values doesn't change at runtime.
bss section

To declare variables
text section

_start specifies the starting of this section where the actually code is written.

Variables

There are various define directives to allocate space for variables for both initialized and uninitialized data.

1. To allocate storage space to Initialized data

Syntax

variable-name    define-directive    initial-value

Define Directive	Description	Allocated Space
DB	Define Byte	1 byte
DW	Define Word	2 bytes
DD	Define Doubleword	4 bytes
DQ	Define Quadword	8 bytes
DT	Define Ten Bytes	10 bytes

2. To allocate storage space to un-initialized data

Define Directive	Description
RESB	Reserve a Byte
RESW	Reserve a Word
RESD	Reserve a Doubleword
RESQ	Reserve a Quadword
REST	Reserve a Ten Bytes

Constants

Constants can be defined using

1. equ

To define numeric constants

CONSTANT_NAME EQU regular-exp or value

2. %assign

To define numeric constants.

%assign constant_name value

3. %define

To define numeric or string constants.

%define constant_name value

Loops

Loops are used to iterate a set of statements for a specific number of times.

mov ECX,n
L1:
;<loop body>
loop L1

where n specifies the no of times loops should iterate.

Procedures

Procedure is a sub-routine which contains set of statements. Usually procedures are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

procedure_name:
   ;procedure body
   ret