1/*        $NetBSD: memcpy.S,v 1.2 2014/05/23 03:17:31 uebayasi Exp $  */
2/*-
3 * Copyright (c) 2011 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Joerg Sonnenberger.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <machine/asm.h>
32          RCSID("$NetBSD: memcpy.S,v 1.2 2014/05/23 03:17:31 uebayasi Exp $")
33
34#  ifdef BCOPY
35ENTRY(bcopy)
36          pushl     %esi
37          pushl     %edi
38          movl      12(%esp), %esi
39          movl      16(%esp), %edi
40          jmp       __memmove_start
41#  endif
42#  if defined(MEMMOVE)
43ENTRY(memcpy)
44ENTRY(memmove)
45          pushl     %esi
46          pushl     %edi
47          movl      12(%esp), %edi
48          movl      16(%esp), %esi
49          .globl __memmove_start
50__memmove_start:
51          movl      20(%esp), %ecx
52          pushl     %edi
53          testl %ecx, %ecx
54          jz 2f
55          cmpl      %esi, %edi
56          jb 1f
57          addl %ecx, %esi
58          decl %esi
59          addl %ecx, %edi
60          decl %edi
61          std
621:
63          rep
64          movsb
652:
66          cld
67          popl      %eax
68          popl      %edi
69          popl      %esi
70          ret
71END(memcpy)
72END(memmove)
73#  endif /* MEMMOVE */
74#  ifdef BCOPY
75END(bcopy)
76#  endif
77