 section .data
  result_message db "Result is true.",0
  false_message db "Result is false.", 0
section .text
global _start

_start:
  ;Assune same boolean values in memory
  mov eax, 0 ;Set EAX to 1 (true)
  mov ebx,0 ;set EeX to 0 (false)
  mov ecx, 1 ;Set ECX to 1 (true)
  ;Evaluate the conditional expression: (EAX AND ECX) OR (EbX AND EAX)
  test eax, eax ;Test if EAX is true
  jnz first_true ; Jump if true
  test ebx, ebx ; Test iF EGX ïs true
  jnz second_true;Jump if true
  jmp false_result; Jump to false_result if neither condition is true
first_true:
  test ecx, ecx ;Test if ECX is true
  jnz true_result ;Jump to true_result if true
  
second_true:
  true_result:
     ;If we reached here, the result is true
    mov edx, 16
    mov ecx, result_message
    mov ebx, 1
    mov eax, 4
    int 80h
    jmp done

false_result:
  ;If we reached here, the result is false
  mov edx, 16
  mov ecx, false_message
  mov ebx, 1
  mov eax, 4
  int 80h
  
done:
  ;Terminate the progron
  mov eax, 1
  xor ebx, ebx
  int 80h

created 1 year ago by Tinotenda Choga

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