VirtualBox

source: vbox/trunk/src/VBox/Devices/BiosCommonCode/fmemcpy.asm@ 65710

Last change on this file since 65710 was 62518, checked in by vboxsync, 8 years ago

(C) 2016

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 1.7 KB
Line 
1; $Id: fmemcpy.asm 62518 2016-07-22 19:14:29Z vboxsync $
2;; @file
3; Compiler support routines.
4;
5
6;
7; Copyright (C) 2012-2016 Oracle Corporation
8;
9; This file is part of VirtualBox Open Source Edition (OSE), as
10; available from http://www.virtualbox.org. This file is free software;
11; you can redistribute it and/or modify it under the terms of the GNU
12; General Public License (GPL) as published by the Free Software
13; Foundation, in version 2 as it comes in the "COPYING" file of the
14; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16;
17
18
19;*******************************************************************************
20;* Exported Symbols *
21;*******************************************************************************
22public _fmemcpy_
23
24
25 .8086
26
27_TEXT segment public 'CODE' use16
28 assume cs:_TEXT
29
30
31;;
32; memcpy taking far pointers.
33;
34; cx, es may be modified; si, di are preserved
35;
36; @returns dx:ax unchanged.
37; @param dx:ax Pointer to the destination memory.
38; @param cx:bx Pointer to the source memory.
39; @param sp+2 The number of bytes to copy (dw).
40;
41_fmemcpy_:
42 push bp
43 mov bp, sp
44 push di
45 push ds
46 push si
47
48 mov es, dx
49 mov di, ax
50 mov ds, cx
51 mov si, bx
52 mov cx, [bp + 4]
53 rep movsb
54
55 pop si
56 pop ds
57 pop di
58 mov sp, bp
59 pop bp
60 ret
61
62
63_TEXT ends
64 end
65
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