1*9b9d2a55Sguenther/* $OpenBSD: strlen.S,v 1.3 2015/08/31 02:53:57 guenther Exp $ */ 211096442Sart/* $NetBSD: strlen.S,v 1.1 1998/09/11 04:56:33 eeh Exp $ */ 311096442Sart 411096442Sart/* 511096442Sart * Copyright (c) 1992, 1993 611096442Sart * The Regents of the University of California. All rights reserved. 711096442Sart * 811096442Sart * This software was developed by the Computer Systems Engineering group 911096442Sart * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 1011096442Sart * contributed to Berkeley. 1111096442Sart * 1211096442Sart * Redistribution and use in source and binary forms, with or without 1311096442Sart * modification, are permitted provided that the following conditions 1411096442Sart * are met: 1511096442Sart * 1. Redistributions of source code must retain the above copyright 1611096442Sart * notice, this list of conditions and the following disclaimer. 1711096442Sart * 2. Redistributions in binary form must reproduce the above copyright 1811096442Sart * notice, this list of conditions and the following disclaimer in the 1911096442Sart * documentation and/or other materials provided with the distribution. 206580fee3Smillert * 3. Neither the name of the University nor the names of its contributors 2111096442Sart * may be used to endorse or promote products derived from this software 2211096442Sart * without specific prior written permission. 2311096442Sart * 2411096442Sart * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2511096442Sart * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2611096442Sart * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2711096442Sart * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2811096442Sart * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2911096442Sart * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3011096442Sart * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3111096442Sart * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3211096442Sart * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3311096442Sart * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3411096442Sart * SUCH DAMAGE. 3511096442Sart */ 3611096442Sart 37*9b9d2a55Sguenther#include "SYS.h" 3811096442Sart 3911096442SartENTRY(strlen) 4011096442Sart add %o0, 1, %o1 ! save starting point + 1 4111096442Sart1: 4211096442Sart ldsb [%o0], %o2 ! fetch byte 4311096442Sart brnz,pt %o2, 1b ! no, keep going 4411096442Sart inc %o0 ! always increment pointer 4511096442Sart retl 4611096442Sart sub %o0, %o1, %o0 ! return length (ptr - (origptr+1)) 47*9b9d2a55SguentherEND_STRONG(strlen) 48