找不到最长的递减序列的负数

Question

我写了一个与C组合的汇编代码。只有在数组中的数字为正数时，它才有效。如果我要测试任何负数，则跳过数字。

这是我的汇编代码：

INCLUDE Irvine32.inc

.data

; LSD
bestIndex dword 0
bestLen dword 0
curIndex dword 0
curLen dword 1
i dword 1
strLSD byte "Longest Decreasing Sequence: ", 0
strBestIndex byte "Begins at index ", 0
strBestLen byte " and has a length of ", 0

.code

findLDS proc C arr:sdword, len:dword
;arr - array passed from C
;len is the length of the array

mov ecx, len
mov esi, arr
add esi, type arr

compare:
    .IF i <= ecx
    jmp cont
    .ELSE
    jmp ex
    .ENDIF

cont:
    mov eax, dword ptr [esi - type arr]
    .IF dword ptr [esi] <= eax
    jmp incCurLen
    .ELSE
    jmp setCurLen
    .ENDIF

incCurLen:
    inc curLen
    jmp compareCurLen

setCurLen:
    mov curLen, 1
    mov eax, i
    mov curIndex, eax
    jmp compareCurLen

compareCurLen:
    mov eax, bestLen
    .IF curLen > eax
    jmp changeBest
    .ELSE
    jmp incI
    .ENDIF

changeBest:
    mov eax, curIndex
    mov bestIndex, eax
    mov eax, curLen
    mov bestLen, eax
    jmp incI

incI:
    inc i
    add esi, type arr
    jmp compare

ex:
    ; when our loop ends, print the sequence
    mov ecx, bestLen
    mov ebx, bestIndex
    mov edx, offset strLSD
    call writestring

    L1:
        push ecx
        mov esi, arr
        mov eax, dword ptr [esi + type arr*ebx]
        call writeint
        mov al, ','
        call writechar
        mov al, ' '
        call writechar
        inc ebx
        pop ecx
        loop l1

call crlf
mov edx, offset strBestIndex
call writestring
mov eax, bestIndex
call writedec

mov edx, offset strBestLen
call writeString
mov eax, bestLen
call writedec

call crlf
ret
findLDS endp

END

这是我的C代码：

int main()
{

int arr[] = { -5, 10, 20, 80, 73, 32, 20, 22, 19, -5 };
int len = (sizeof(arr) / sizeof(*arr));
findLDS(arr, len);

return 0;
}

此数组的输出：

最长降序：+ 80，+ 73，+ 32，+ 20。从索引3开始，长度为4

这是正确的，但是如果我将数组的20（索引6）更改为-20，则输出为

最长降序：+ 80，+ 73，+ 32。从索引3开始，长度为3

Answer 1

根据@Jester的建议，我将其更改为已签名的cmp，并且可以使用。

代码：

cont:
    mov eax, dword ptr [esi - type arr]
    cmp dword ptr [esi], eax
    jle incCurLen
    jmp setCurLen