 SYSEXIT = 1
SYSCALL = 0x80
EXIT_SUCCESS = 0

.data

# rezerwowanie miejsca

num1: 
    .long 0x10304008, 0x701100FF, 0x45100020, 0x08570030
num1_len = (.-num1)/4

num2:
    .long 0xF040500C, 0x00220026, 0x321000CB, 0x04520031
num2_len = (.-num2)/4

.text
.global _start
_start:

# czyszczenie flagi

clc
pushf

movl $num1_len, %edi
movl $num2_len, %esi

add_program:
    decl %edi
    decl %esi
    popf
    movl num1(,%esi, 4), %eax
    movl num2(,%edi, 4), %ebx
    adcl %eax, %ebx
    push %rbx
    pushf
    clc
    cmpl $EXIT_SUCCESS, %edi
    jz add2
    cmpl $EXIT_SUCCESS, %esi
    jz add1

    jmp add_program

add2:
    cmpl $EXIT_SUCCESS, %esi
    je last_carry
    decl %esi
    popf
    movl num1(,%edi,4), %ebx
    adcl $0, %ebx
    push %rbx
    
    pushf
    clc

    jmp add2

add1:
    cmpl $0, %esi
    je last_carry
    decl %esi
    popf
    movl num1(,%esi,4), %ebx
    adcl $0, %ebx
    push %rbx
    
    pushf
    clc

    jmp add1

last_carry:

    popf

    xor %eax, %eax
    xor %ebx, %ebx
    mov $0, %eax
    mov $0, %ebx
    adcl %eax, %ebx
    cmpl $0, %ebx
    je exit
    push %rbx

exit:
    movl $SYSEXIT, %eax
    movl $EXIT_SUCCESS, %ebx
    int $SYSCALL

created 3 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