1/* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * %sccs.include.redist.c% 10 * 11 * from: $Header: strlen.s,v 1.1 92/06/25 12:52:47 torek Exp $ 12 */ 13 14#if defined(LIBC_SCCS) && !defined(lint) 15 .asciz "@(#)strlen.s 8.1 (Berkeley) 06/04/93" 16#endif /* LIBC_SCCS and not lint */ 17 18#include "DEFS.h" 19 20ENTRY(strlen) 21 add %o0, 1, %o1 ! save starting point + 1 221: 23 ldsb [%o0], %o2 ! fetch byte 24 tst %o2 ! null? 25 bne 1b ! no, keep going 26 inc %o0 ! always increment pointer 27 retl 28 sub %o0, %o1, %o0 ! return length (ptr - (origptr+1)) 29