assembly fibonacci
Here's an example of an assembly language code that calculates the Fibonacci sequence:
section .data
fibSize db 10 ; Number of Fibonacci numbers to generate
section .bss
fibNumbers resb 10 ; Array to store Fibonacci numbers
section .text
global _start
_start:
; Initialize the first two Fibonacci numbers
mov byte [fibNumbers], 0
mov byte [fibNumbers + 1], 1
; Generate the rest of the Fibonacci numbers
mov ecx, 2 ; Starting index for the next Fibonacci number
generate_loop:
cmp ecx, fibSize
jge print_numbers
; Calculate the next Fibonacci number
mov al, byte [fibNumbers + ecx - 1]
add al, byte [fibNumbers + ecx - 2]
mov byte [fibNumbers + ecx], al
; Increment the index
inc ecx
jmp generate_loop
print_numbers:
; Print the Fibonacci numbers
mov ecx, fibSize
mov ebx, 1 ; File descriptor for stdout
print_loop:
dec ecx
mov al, byte [fibNumbers + ecx]
add al, '0' ; Convert the number to ASCII
mov [esp], al
mov eax, 4 ; System call number for write
int 0x80 ; Call the kernel
cmp ecx, 0
jne print_loop
exit_program:
; Exit the program
mov eax, 1 ; System call number for exit
xor ebx, ebx ; Exit with status 0
int 0x80 ; Call the kernel
This assembly code generates the Fibonacci sequence and stores it in an array called fibNumbers
. It starts with the first two numbers, 0 and 1, and then calculates the rest of the sequence by adding the previous two numbers. The code uses a loop to generate and store the Fibonacci numbers, and then another loop to print them out. Finally, the program exits.