MASM 32... Kip Irvine

Can anyone help me write a function to call exchange PROC where it will swap the values if [esi] => [edi]. I am having trouble pushing the values and getting them to compare in the exchange PROC.

Here is the code. It is a bubblesort.

sortList PROC

push ebp ; Set up stack

mov ebp, esp ; Set up EBP to ESP pointer

mov ecx, [ebp + 8] ; Loop counter

dec ecx ; We will loop until n-1

outerloop:

push ecx ; Save the outer loop count

mov esi, [ebp + 12] ; Point to the first value in the array

innerloop:

mov eax, [esi] ; Get the element at index inside array

cmp [esi+4], eax ; Compare a pair of values

jb notgreater ; If [esi] => [edi], exchange

call exchange ; Else call Exchange

>> xchg eax, [esi+4] << ; How can I exchange these two values in the EXCHANGE PROC? and return to the next line?

mov [esi], eax

notgreater:

add esi, 4 ; Move both pointers forward

loop innerloop ; Inner loop

pop ecx ; Get outer loop count

loop outerloop ; Else repeat outer loop

bubblecomplete:

pop ebp

ret 8 ; Clear stack

sortList ENDP

exchange PROC

exchange ENDP