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  1. section .data
  2.     positive_msg db "Positive!", 10, 0  ; Message for positive number, newline, null-terminated
  3.     negative_msg db "Not positive!", 10, 0 ; Message for negative number, newline, null-terminated
  4.  
  5. section .text
  6.     global _start
  7.  
  8. _start:
  9.     ; Example: Check if the number -5 is positive
  10.     mov rax, -5  ; Load the number to check into rax
  11.  
  12.     cmp rax, 0   ; Compare rax with 0
  13.     jg positive_case ; Jump to positive_case if rax is greater than 0 (positive)
  14.  
  15.     ; Negative or zero case
  16.     ; Print "Not positive!"
  17.     mov rax, 1                ; System call number for write
  18.     mov rdi, 1                ; File descriptor 1 (stdout)
  19.     mov rsi, negative_msg   ; Address of the negative message
  20.     mov rdx, 14              ; Length of the negative message (including newline and null)
  21.     syscall
  22.     jmp exit
  23.  
  24. positive_case:
  25.     ; Print "Positive!"
  26.     mov rax, 1                ; System call number for write
  27.     mov rdi, 1                ; File descriptor 1 (stdout)
  28.     mov rsi, positive_msg   ; Address of the positive message
  29.     mov rdx, 10              ; Length of the positive message (including newline and null)
  30.     syscall
  31.  
  32. exit:
  33.     ; Exit the program
  34.     mov rax, 60       ; System call number for exit
  35.     xor rdi, rdi    ; Exit code 0
  36.     syscall
  37.  
Success #stdin #stdout 0s 5276KB
comments (?)
stdin
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Standard input is empty
stdout
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Not positive!
https://ideone.com/nMHcgV
language:
Assembler 64bit (nasm 2.14)
created:
5 hours ago
visibility:
public

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