Data commit

Task/FizzBuzz/X86-Assembly/fizzbuzz.x86

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+; x86_64 linux nasm
+
+section .bss
+number resb 4
+
+section .data
+fizz: db "Fizz"
+buzz: db "Buzz"
+newLine: db 10
+
+section .text
+global _start
+
+_start:
+
+  mov rax, 1      ; initialize counter
+
+  loop:
+    push rax
+    call fizzBuzz
+    pop rax
+    inc rax
+    cmp rax, 100
+    jle loop
+
+  mov rax, 60
+  mov rdi, 0
+  syscall
+
+fizzBuzz:
+  mov r10, rax
+  mov r15, 0       ; boolean fizz or buzz
+  checkFizz:
+    xor rdx, rdx   ; clear rdx for division
+    mov rbx, 3
+    div rbx
+    cmp rdx, 0     ; modulo result here
+    jne checkBuzz
+    mov r15, 1
+    mov rsi, fizz
+    mov rdx, 4
+    mov rax, 1
+    mov rdi, 1
+    syscall
+  checkBuzz:
+    mov rax, r10
+    xor rdx, rdx
+    mov rbx, 5
+    div rbx
+    cmp rdx, 0
+    jne finishLine
+    mov r15, 1
+    mov rsi, buzz
+    mov rdx, 4
+    mov rax, 1
+    mov rdi, 1
+    syscall
+  finishLine:      ; print number if no fizz or buzz
+    cmp r15, 1
+    je nextLine
+    mov rax, r10
+    call printNum
+    ret
+    nextLine:
+      mov rsi, newLine
+      mov rdx, 1
+      mov rax, 1
+      mov rdi, 1
+      syscall
+      ret
+
+printNum:          ; write proper digits into number buffer
+  cmp rax, 100
+  jl lessThanHundred
+  mov byte [number], 49
+  mov byte [number + 1], 48
+  mov byte [number + 2], 48
+  mov rdx, 3
+  jmp print
+
+  lessThanHundred: ; get digits to write through division
+    xor rdx, rdx
+    mov rbx, 10
+    div rbx
+    add rdx, 48
+    cmp rax, 0
+    je lessThanTen
+    add rax, 48
+    mov byte [number], al
+    mov byte [number + 1], dl
+    mov rdx, 2
+    jmp print
+
+  lessThanTen:
+    mov byte [number], dl
+    mov rdx, 1
+  print:
+    mov byte [number + rdx], 10   ; add newline
+    inc rdx
+    mov rax, 1
+    mov rdi, 1
+    mov rsi, number
+    syscall
+  ret