Translate the following C program to Pep/9 assembly language. #include #include

Question

Translate the following C program to Pep/9 assembly language.

#include

#include const int limit = 5;

int main() {

int number;

scanf("%d", &number);

while (number < limit) {

number++;

printf("%d ", number);

}

return 0;

}

this is what I got so far and was wondering if it is correct

BR main

limit: .BLOCK 5 ;constant

number: .EQUATE 0 ;local variable #2d

;

main: SUBSP 2,i ;push #number

DECI number,s ;scanf("%d", &number)

while: LDWA number,s ;if (number < limit)

CPBA limit, i

BRGE endWh

ADDA 1,s

NEGA

STWA number,s

endWh: DECO number,s ;printf("%d", number)

ADDSP 2,i

STOP

.END

Explanation / Answer

main:
        push    rbp ; base pointer points to base of stack
        mov     rbp, rsp ; copy stack pointer to base pointer
        sub     rsp, 16 ;allocate space for 1-15 bytes of local variable
        lea     rax, [rbp-4] ; load effictive address
        mov     rsi, rax ; copy rax value into rsi
        mov     edi, OFFSET FLAT:.LC0
        mov     eax, 0
        call    scanf ; scanf("%d", &number);
.L3:    ; while loop
        mov     eax, DWORD PTR [rbp-4]
        cmp     eax, 4
        jg      .L2
        mov     eax, DWORD PTR [rbp-4]
        add     eax, 1 ; num++
        mov     DWORD PTR [rbp-4], eax
        mov     eax, DWORD PTR [rbp-4]
        mov     esi, eax
        mov     edi, OFFSET FLAT:.LC1
        mov     eax, 0
        call    printf ; printf("%d", number);
        jmp     .L3
.L2:
        mov     eax, 0
        leave
        ret ; return

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