;*a++ = *b++;
	mov	r0,_a
	mov	r1,_b
	mov	ar2,@r1
	inc	_b
	mov	@r0,ar2
	inc	_a
	ret
;------------------------------------------------------------
;*a = *b;
	mov	r0,_a
	mov	r1,_b
	mov	ar2,@r1
	mov	@r0,ar2
;++a;
	inc	_a
;++b;
	inc	_b
	ret