如何在彙編語言的語句之前執行此操作？

Question

b) sum = 0; count = 1; repeat (add count to sum; add 1 to count); until (sum > 5000) or (count = 40); 
Answer: 
    mov sum, 0 
    mov ecx, 1 
untilB: add sum, ecx 
    inc ecx 
    cmp sum, 5000 
    **what comes after this?** 
enduntilB: 

那麼我應該爲每個條件使用什麼樣的跳轉語句（總和> 5000或計數= 40）？

另外：

c) sum = 1000; for count = 100 downto 50 (subtract (2 * count) from sum); end for; 
Answer: 
    mov sum, 1000 
    mov ecx, 100 
forC: cmp ecx, 50 
    jnge endforC 
    **what comes after this?** 
    dec ecx 
    jmp forC 
endforC: 

Answer 1

事情是這樣的：

mov sum, 0 
    mov ecx, 1 
untilB: add sum, ecx 
    inc ecx 
    cmp sum, 5000 
    jg enduntilB 
    cmp ecx, 40 
    je enduntilB 
    jmp untilB 
enduntilB: 

mov sum, 1000 
    mov ecx, 100 
forC: cmp ecx, 50 
    jl endforC 
    imul eax, ecx, 2 
    // 
    // alternatively: 
    // mov eax, ecx 
    // shl eax, 1 
    // 
    // alternatively: 
    // mov eax, ecx 
    // add eax, eax 
    // 
    dec sum, eax 
    dec ecx 
    jmp forC 
endforC: