cstrlenx.s

ICCAVR中所有的库函数源码

	.text
_cstrlen::
	mov r30,r16
	mov r31,r17
	clr r26
	clr r27
loop:
	elpm
	tst r0
	breq done
	adiw r30,1
	adiw r26,1
	rjmp loop
done:
	mov r16,r26
	mov r17,r27
	ret