; Running example to count one digits in a given range (author: fcdt)
; https://codegolf.stackexchange.com/questions/209146/how-many-1s-we-get
section .text
global _start
_start:
; First function call
mov ebx, 1 ; Range start
mov ecx, 100 ; Range end
call countOnes
; Output first test result
mov eax, edi
mov edi, outputBuffer
mov esi, resultMask
call outputResult
push edi
push esi
; Second function call
mov ebx, 11 ; Range start
mov ecx, 200 ; Range end
call countOnes
; Output second test result
mov eax, edi
pop esi
pop edi
call outputResult
push edi
push esi
; Third function call
mov ebx, 123 ; Range start
mov ecx, 678 ; Range end
call countOnes
; Output third test result
mov eax, edi
pop esi
pop edi
call outputResult
; Output to stdout
mov edx, edi
mov ecx, outputBuffer ; pointer to output data
sub edx, ecx ; data length
mov ebx, 1 ; file descriptor (stdout)
mov eax, 4 ; system call number (sys_write)
int 0x80
mov eax, 1 ; system call number (sys_exit)
int 0x80
; Helper Function to output test results
outputResult:
movzx ecx, byte [esi] ; Load length of data to be copied
inc esi ; esi points to begin of data
rep movsb
mov ecx, 10 ; Convert value in eax to decimal and save
xor ebx, ebx ; ASCII-representation in memory pointed to
loop1: ; by edi
cdq
div ecx
inc ebx
test eax, eax
push edx
jnz loop1
loop2:
pop eax
or al, '0'
mov [edi], al
inc edi
dec ebx
jnz loop2
ret
; Function to count 1's in decimal representation of numbers in given range
countOnes:
xor edi, edi ; 31 FF Set edi = 0 (counter for result)
lea esi, [edi+10] ; 8D 77 0A Set esi = 10
notFinished:
mov eax, ecx ; 89 D8 eax contains the number to be checked next
notZero:
xor edx, edx ; 31 D2
div esi ; F7 F6 Separate digit from current number
cmp dl, 1 ; 80 FA 01 Check if this digit was one
jne notOne ; 75 01
inc edi ; 47 When the digit was one, increase counter
notOne:
test eax, eax ; 85 C0
jnz notZero ; 75 F2 Loop until all digits of current number are checked
cmp ebx, ecx ; 39 CB
loopnz notFinished ; 72 EC Loop until end of range is reached
ret ; C3 Return to caller
; Mask for pretty output
section .data
resultMask db 12,'[1, 100] -> '
db 14,10,'[11, 200] -> '
db 15,10,'[123, 678] -> '
; Allocate space for output buffer
section .bss
outputBuffer resb 256
About Online Asm Compiler
Try our Online Asm Compiler (Version Nasm v2.15.05) to Edit, Run, and Share your Asm Code directly from your browser. This online development environment provides you the latest version Nasm v2.15.05.
How to use Online Asm Compiler?
Write and Execute Code
- Write your program (or, paste it) directly under the "Source Code" tab.
- If you want to save your program, go to the "Project" menu and save it.
- You can directly execute your program without saving it by clicking on on "Execute" button.
User Input
The latest version of Coding Ground allows to provide program input at run time from the termnial window exactly the same way as you run your program at your own computer. So simply run a program and provide your program input (if any) from the terminal window available in the right side.
Online Asm Compiler: Keyboard Shortcuts
The following are the keyword shortcut of this Online Asm Compiler:
Shortcut | Description |
⌘ + Enter | Run the program |
⌘ + S | Save Project (Login Required) |
⇧ + ⌘ + S | Save As Project |
⌘ + P | New Project |
⌘ + G | Share Project |
⌘ + Z | Undo Editing |
⌘ + Y | Redo Editing |
⌘ + A | Select All Text |
⌘ + X | Cut Selected Text |
⌘ + C | Copy Selected Text |
⌘ + V | Paste Copied Text |
⌘ + F | Search Text |
⌘ + ⌥ + F | Replace Text |
Shortcut | Description |
Ctrl + Enter | Run the program |
Ctrl + S | Save Project |
Shift + Ctrl + S | Save As Project |
Ctrl + G | Share Project |
Ctrl + Z | Undo Editing |
Ctrl + Y | Redo Editing |
Ctrl + A | Select All Text |
Ctrl + X | Cut Selected Text |
Ctrl + C | Copy Selected Text |
Ctrl + V | Paste Copied Text |
Ctrl + F | Search Text |
Ctrl + H | Replace Text |
Online Asm Compiler: Save and Share Asm Code (Project)
Save Asm Project Online
You can save your Asm Project with us so that you can access this project later on. To save a project you will need to create a login Id with us. So before you save a project, please create a login Id using a link given at the top right corner of this page.
Share Asm Project Online
You can use this feature to share your Asm Code with your teachers, classmates and colleagues. Just click Share Button and it will create a short link, which can be shared through Email, WhatsApp or even through Social Media. A shared link will be deleted if it has been passive for almost 3 months.
More Features of Online Asm Compiler
- Theme – You can change the current editor's theme from the "Editor Theme" option under "Settings" menu.
- Font Size – You can change the font size of the editor /compiler from from the "Font Size" option under "Settings" menu.
- Tab Size – You can change the tab size from the "Tab Size" option under "Settings" Menu.
- Show/Hide Line Numbers – You can show/hide the line number with the code from the "Show Line Numbers" or "Hide Line Numbers" option under "Settings" Menu.
- And, many more.
Benefits of Using Online Asm Compiler
There are several benefits of using the Online Asm Compiler to run your Asm code:
- Platform independence: You can run your code from any device without taking care of operating systems.
- Convenience: You don't need to install anything for using this.
- No setup required: There is no need for additional setup to run your code.
- Updated version: Our online compiler/editors/terminals are the latest up-to-date.