Question

5. Assume double-word references to memory and that count is in ECX. Give a fragment of assembly code that implements the design structures shown. The code should flow the same as the design: a. Ifcoun> value then end if fa+b- count 0; b. Assume the character check is in AL Then Else end if f(ch 2 'a) and (ch s z) check Y check N c. Assume ch is in AL then add 1 to lowerCount else f (ch 2 A) and (ch s z') then else end if add 1 tu upperCount; add I to otherCount; end if

In assembly code, and if you're writing it out please write neatly so I can be able to read it. Thank you.

Answer 1

(a) :-

        cmp ecx,[value]   ;; compare value with ecx (if count>value)
        jle endif
        mov ecx,0         ;; make count (ecx) 0
endif:

(b) :-

        push ecx
        mov ecx,[a]
        add ecx,[b]        ;; add a with b to compare (a+b)
        cmp ecx,[c]       ;; check condition (a+b == c)
        jne else           ;; jmp to else if (a+b) not equal to c (a+b != c )
        mov al,'Y'         ;; move 'Y' in al (check = 'Y')
        jmp endif
else:
        mov al,'N'         ;; move 'N' in al (check = 'N')
endif:
        pop ecx

(c) : -

        cmp al,'a'       ;; compare al with 'a'
        jl else          ;; jump to label (else) if al < 'a'
        cmp al,'z'       ;; compare al with 'z'
        jg else          ;; jump to label (else) if al > 'z'
if:     
        mov ecx,lowerCount
        inc dword[ecx]   ;; increament lowerCount by 1 (add 1 into lowerCount)
        jmp endif
else:
        cmp al,'A'       ;; compare al with 'A'
        jl else1         ;; jump to label (else1) if al < 'A'
        cmp al,'Z'       ;; compare al with 'Z'
        jg else1         ;; jump to label (else1) if al > 'Z'
innerif:        
        mov ecx,upperCount
        inc dword[ecx]   ;; increament upperCount by 1 (add 1 into upperCount)
        jmp endif
else1:  
        mov ecx,otherCount
        inc dword[ecx]   ;; increament otherCount by 1 (add 1 into otherCount)
        jmp endif
endif: