80x86 Intro to Assembly Language - I am just trying to make sure I have this ans

Question

80x86 Intro to Assembly Language - I am just trying to make sure I have this answer correct.

Here is the problem:

1.    The following code utilizes a while loop. Assume that sum references a doubleword in the data segment and that count is in the ECX register. Give a fragment of 80x86 cod that implements the design.

sum := 0;

count := 100;

while (sum<1000) or (count >= 0) loop

add count to sum;

subtract 1 from count;

end while;

Here is what I have come up with:

mov ecx,0                                 ; set ECX register =0

mov eax,4                        ; set EAX register = 4

whilesum:

          cmp sum,1000        ; subtract total value of the SUM to 1000

          add ecx,eax             ; Add value of EAX register into ECX register

          sub ecx,1               ; subtract 1 from ECX register

jnl endwhilesum                ; jump to endwhilesum label if not less than 1000

endwhilesum:

Am I missing anything or does this satisfy the question?

Explanation / Answer

Given code is maximum correct.

Modified code highlight(bold) in provided code:

mov ecx,0                                 ; set ECX register =0
mov eax,4                        ; set EAX register = 4
whilesum:
         cmp sum,1000        ; subtract total value of the SUM to 1000
          jn1 endwhile          ; exit loop if not

body: add ecx,eax             ; Add value of EAX register into ECX register
          sub ecx,1               ; subtract 1 from ECX register
jnl endwhilesum                ; jump to endwhilesum label if not less than 1000
endwhilesum:

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