/* $NetBSD: strncmp.S,v 1.2 2008/04/28 20:22:52 martin Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Hiroshi Horimoto and * by J.T. Conklin . * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #if defined(LIBC_SCCS) && !defined(lint) RCSID("$NetBSD: strncmp.S,v 1.2 2008/04/28 20:22:52 martin Exp $") #endif /* LIBC_SCCS and not lint */ ENTRY(strncmp) movl %sp@(12),%d0 jeq L4 movl %sp@(4),%a0 movl %sp@(8),%a1 L1: /* unroll by 4 for m680[23]0's */ movb %a0@+,%d1 jeq L2 subb %a1@+,%d1 jne L3 subql #1,%d0 jeq L4 movb %a0@+,%d1 jeq L2 subb %a1@+,%d1 jne L3 subql #1,%d0 jeq L4 movb %a0@+,%d1 jeq L2 subb %a1@+,%d1 jne L3 subql #1,%d0 jeq L4 movb %a0@+,%d1 jeq L2 subb %a1@+,%d1 jne L3 subql #1,%d0 jne L1 L4: rts L2: subb %a1@,%d1 L3: scs %d0 EXTBL(%d0) movb %d1,%d0 rts