section .data
msg1 : db "enter the number of elements of array : ", 10, 13
len1 : equ $-msg1
msg2 : db "enter the elements : ", 10, 13
len2 : equ $-msg2
msg3 : db "enter the element to be searched : ", 10, 13
len3 : equ $-msg3
msg4: db "element found at position : ", 10, 13
len4: equ $-msg4
msg5: db "element not found !! ", 10, 13
len5: equ $-msg5
section .bss
no: resd 1
no2: resd 1
divide: resd 1
dispcount: resd 1
no_of_elements: resd 1
array: resd 50
temp: resd 1
element: resd 1
pos: resd 1
temp1 resd 1
section .text
global _start
_start:
mov eax, 4
mov ebx, 1
mov ecx, msg1
mov edx, len1
int 80h
call getnumber
mov eax, [no]
mov [no_of_elements], eax
mov eax, 4
mov ebx, 1
mov ecx, msg2
mov edx, len2
int 80h
mov eax, [no_of_elements]
mov [temp], eax
getarr:
cmp dword [temp], 0
je donegetno
call getnumber
mov eax, [no]
push eax
dec dword [temp]
jmp getarr
donegetno:
mov eax, 4
mov ebx, 1
mov ecx, msg3
mov edx, len3
int 80h
call getnumber
mov eax, [no]
mov [element], eax
mov ebx, [no_of_elements]
mov [temp], ebx
search:
pop eax
mov [no], eax
cmp [element], eax
je found
dec dword [temp]
cmp dword [temp], 0
jne search
jmp notfound
found :
add dword [temp], 30h
mov eax, 4
mov ebx, 1
mov ecx, msg4
mov edx, len4
int 80h
mov eax, 4
mov ebx, 1
mov ecx, temp
mov edx, 1
int 80h
mov dword [no], 10
mov eax, 4
mov ebx, 1
mov ecx, no
mov edx, 1
int 80h
jmp exit
notfound :
mov eax, 4
mov ebx, 1
mov ecx, msg5
mov edx, len5
int 80h
exit:
mov eax, 1
mov ebx, 0
int 80h
getnumber:
mov dword [no], 0
mov eax, 3
mov ebx, 0
mov ecx, no
mov edx, 1
int 80h
sub dword [no], 30h
l1: mov eax, 3
mov ebx, 0
mov ecx, no2
mov edx, 1
int 80h
cmp dword [no2], 10d
je done
sub dword [no2], 30h
mov eax, dword [no]
mov ecx, 10
mul ecx
mov edx, 0
add eax, dword [no2]
mov dword [no], eax
jmp l1
done:
ret
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.
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.
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.
There are various define directives to allocate space for variables for both initialized and uninitialized data.
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 |
| 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 can be defined using
CONSTANT_NAME EQU regular-exp or value
%assign constant_name value
%define constant_name value
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.
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