bsort.asm

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TITLE  BubbleSort Procedure                  (BSort.asm)

; Sort an array of signed integers, using the Bubble
; sort algorithm. The main program is in B_main.asm.
; Last update: 9/10/01

INCLUDE Irvine32.inc

.code
;----------------------------------------------------------
BubbleSort PROC USES eax ecx esi,
	pArray:PTR DWORD,		; pointer to array
	Count:DWORD		; array size
;
; Sort an array of 32-bit signed integers in ascending order
; using the bubble sort algorithm.
; Receives: pointer to array, array size
; Returns: nothing
;-----------------------------------------------------------

	mov ecx,Count
	dec ecx		; decrement count by 1

L1:	push ecx		; save outer loop count
	mov esi,pArray		; point to first value

L2:	mov eax,[esi]		; get array value
	cmp [esi+4],eax		; compare a pair of values
	jge L3		; if [esi] <= [edi], don't exch
	xchg eax,[esi+4]		; exchange the pair
	mov [esi],eax

L3:	add esi,4		; move both pointers forward
	loop L2		; inner loop

	pop ecx		; retrieve outer loop count
	loop L1		; else repeat outer loop

L4:	ret
BubbleSort ENDP

END