This doesn't quite follow the Italics section, but I think It's what you meant.
Code:
	movlw	32             ; start with 32 loops
	movwf	R3

SkiOpt
	movf    R0 + 3, W      ; IF R0.byte3 = 0 
	bnz     divloop
	movf    R1 + 3, W      ;   AND R1.byte3 = 0 then 
	bnz     divloop

	movlw   8              ;      loops - 8  ; movlw 24
	subwf   R3, F

	movff   R0 + 2, R0 + 3 ;      and preshift R0
	movff   R0 + 1, R0 + 2
	movff   R0 + 0, R0 + 1
	clrf    R0

	movff   R1 + 2, R1 + 3 ;      and R1 over 8 bits
	movff   R1 + 1, R1 + 2
	movff   R1 + 0, R1 + 1
	clrf    R1

	movf    R3, W
	btfss   STATUS, Z      ; stop if no loop's left (0/0)
	bra     SkiOpt
Does it look like what you were thinking?
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