Fibonacci numbers in MASM

fibonacci.asm

INCLUDE Irvine32.inc

; #define MAX_ITER 45
; int main() {
;     int n;
;     int m;
;     int tmp;
;     int i;
;     i = 0;
;     n = 0;
;     m = 1;
;     while (i < MAX_ITER) {
;         printf("%d\n",n);
;         tmp = m;
;         m += n;
;         n = tmp;
;         ++i;
;     }
; }


MAX_ITER = 45

.data

n       DWORD       0
m       DWORD       1
tmp     DWORD       0
i       BYTE        0


.code
main PROC

    CMP     i, MAX_ITER
    JGE     pau

    ; printf("%d\n", n);
    mov     eax, n
    call    WriteDec
    call    CrLf

    ; tmp = m;
    mov     eax, m
    mov     tmp, eax

    ; m += n;
    mov     eax, n
    add     m, eax

    ; n = tmp
    mov     eax, tmp
    mov     n, eax

    inc     i

    jmp     main

pau:
    invoke  ExitProcess, 0 

main ENDP
END main

fibonacci_v2.asm

INCLUDE Irvine32.inc

; #define MAX_ITER 45
; int main() {
;     int n;
;     int m;
;     int tmp;
;     int i;
;     i = 0;
;     n = 0;
;     m = 1;
;     while (i < MAX_ITER) {
;         printf("fib %d -> %d\n",i,n);
;         tmp = m;
;         m += n;
;         n = tmp;
;         ++i;
;     }
; }


MAX_ITER = 45

.data

fibName     BYTE        "fib ",0
arrow       BYTE        " -> ",0

n           DWORD       0
m           DWORD       1
tmp         DWORD       0
i           DWORD       0


.code
main PROC

    CMP     i, MAX_ITER
    JGE     pau

    ; printf("fib %d -> %d\n", n);
    mov     edx, offset fibName
    call    WriteString                 ; write "fib "
    mov     eax, i
    call    WriteDec                    ; write "{i}"
    mov     edx, offset arrow
    call    WriteString                 ; write " -> "
    mov     eax, n
    call    WriteDec                    ; write "{n}"
    call    CrLf

    ; tmp = m;
    mov     eax, m
    mov     tmp, eax

    ; m += n;
    mov     eax, n
    add     m, eax

    ; n = tmp
    mov     eax, tmp
    mov     n, eax

    inc     i

    jmp     main

pau:
    invoke  ExitProcess, 0 

main ENDP
END main