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bcopy.s revision 1.8.72.1 
      1  1.8.72.1     mjf /*	$NetBSD: bcopy.s,v 1.8.72.1 2008/06/02 13:21:51 mjf Exp $	*/
      2       1.3      is 
      3       1.3      is /*-
      4       1.4      is  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5       1.1      is  * All rights reserved.
      6       1.1      is  *
      7       1.3      is  * This code is derived from software contributed to The NetBSD Foundation
      8       1.3      is  * by Ignatios Souvatzis.
      9       1.3      is  *
     10       1.1      is  * Redistribution and use in source and binary forms, with or without
     11       1.1      is  * modification, are permitted provided that the following conditions
     12       1.1      is  * are met:
     13       1.1      is  * 1. Redistributions of source code must retain the above copyright
     14       1.1      is  *    notice, this list of conditions and the following disclaimer.
     15       1.1      is  * 2. Redistributions in binary form must reproduce the above copyright
     16       1.1      is  *    notice, this list of conditions and the following disclaimer in the
     17       1.1      is  *    documentation and/or other materials provided with the distribution.
     18       1.1      is  *
     19       1.3      is  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20       1.3      is  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21       1.3      is  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22       1.3      is  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23       1.3      is  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24       1.3      is  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25       1.3      is  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26       1.3      is  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27       1.3      is  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28       1.3      is  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29       1.3      is  * POSSIBILITY OF SUCH DAMAGE.
     30       1.3      is  */
     31       1.3      is 
     32       1.3      is /*
     33       1.1      is  * Small but possibly slow bcopy/memcpy combo.
     34       1.1      is  */
     35       1.3      is 
     36       1.5      is #include <machine/asm.h>
     37       1.5      is 
     38       1.1      is 	.text
     39       1.1      is 	.even
     40       1.1      is 
     41       1.8      is ENTRY_NOPROFILE(memmove)
     42       1.5      is ENTRY_NOPROFILE(memcpy)
     43       1.6      is 	movel %sp@(4),%a0
     44       1.6      is 	movel %sp@(8),%a1
     45       1.1      is 	jra Lcpy
     46       1.5      is 
     47       1.5      is ENTRY_NOPROFILE(bcopy)
     48       1.6      is 	movel %sp@(4),%a1
     49       1.6      is 	movel %sp@(8),%a0
     50       1.1      is Lcpy:
     51       1.6      is 	movel %sp@(12),%d0
     52       1.1      is 	jeq L1
     53       1.7  mhitch 	cmpl %a1,%a0
     54       1.1      is 	jcc L3
     55       1.1      is L4:
     56       1.6      is 	moveb %a1@+,%a0@+
     57       1.6      is 	subql #1,%d0
     58       1.1      is 	jne L4
     59       1.1      is 	rts
     60       1.1      is L3:
     61       1.7  mhitch 	addl %d0,%a1
     62       1.7  mhitch 	addl %d0,%a0
     63       1.1      is L9:
     64       1.6      is 	moveb %a1@-,%a0@-
     65       1.6      is 	subql #1,%d0
     66       1.1      is 	jne L9
     67       1.1      is L1:
     68       1.1      is 	rts
     69