1/* $NetBSD: bcopy.s,v 1.8 2006/01/25 13:12:33 is Exp $ */ 2 3/*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Ignatios Souvatzis. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32/* 33 * Small but possibly slow bcopy/memcpy combo. 34 */ 35 36#include <machine/asm.h> 37 38 .text 39 .even 40 41ENTRY_NOPROFILE(memmove) 42ENTRY_NOPROFILE(memcpy) 43 movel %sp@(4),%a0 44 movel %sp@(8),%a1 45 jra Lcpy 46 47ENTRY_NOPROFILE(bcopy) 48 movel %sp@(4),%a1 49 movel %sp@(8),%a0 50Lcpy: 51 movel %sp@(12),%d0 52 jeq L1 53 cmpl %a1,%a0 54 jcc L3 55L4: 56 moveb %a1@+,%a0@+ 57 subql #1,%d0 58 jne L4 59 rts 60L3: 61 addl %d0,%a1 62 addl %d0,%a0 63L9: 64 moveb %a1@-,%a0@- 65 subql #1,%d0 66 jne L9 67L1: 68 rts 69