; fast strcmp
;
	.text
_strcmp::
	mov r30,r16
	mov r31,r17
	mov r26,r18
	mov r27,r19
; Z points to s1
; X points to s2
loop:
	ld	r16,z+
	ld	r17,x+
	sub	r16,r17
	brne done
	tst r17
	breq done
	rjmp loop
done:
	clr r17
	sbrc r16,7
	com r17
	ret