Question

Translate the following pseudo-code assignment statement into IBM PC assembly language. Assume that all variables are signed words.

Digit = Num % 10

Answer 1

main:
        push    rbp
        mov     rbp, rsp
        mov     edx, DWORD PTR [rbp-4]
        movsx   rax, edx
        imul    rax, rax, 1717986919
        shr     rax, 32
        sar     eax, 2
        mov     esi, edx
        sar     esi, 31
        sub     eax, esi
        mov     ecx, eax
        mov     eax, ecx
        sal     eax, 2
        add     eax, ecx
        add     eax, eax
        sub     edx, eax
        mov     DWORD PTR [rbp-8], edx
        mov     eax, 0
        pop     rbp
        ret