VirtualBox

source: vbox/trunk/src/VBox/Devices/BiosCommonCode/fmemset.asm@ 103914

Last change on this file since 103914 was 98103, checked in by vboxsync, 21 months ago

Copyright year updates by scm.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 1.7 KB
Line 
1; $Id: fmemset.asm 98103 2023-01-17 14:15:46Z vboxsync $
2;; @file
3; Compiler support routines.
4;
5
6;
7; Copyright (C) 2012-2023 Oracle and/or its affiliates.
8;
9; This file is part of VirtualBox base platform packages, as
10; available from https://www.virtualbox.org.
11;
12; This program is free software; you can redistribute it and/or
13; modify it under the terms of the GNU General Public License
14; as published by the Free Software Foundation, in version 3 of the
15; License.
16;
17; This program is distributed in the hope that it will be useful, but
18; WITHOUT ANY WARRANTY; without even the implied warranty of
19; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20; General Public License for more details.
21;
22; You should have received a copy of the GNU General Public License
23; along with this program; if not, see <https://www.gnu.org/licenses>.
24;
25; SPDX-License-Identifier: GPL-3.0-only
26;
27
28
29;*******************************************************************************
30;* Exported Symbols *
31;*******************************************************************************
32public _fmemset_
33
34
35 .8086
36
37_TEXT segment public 'CODE' use16
38 assume cs:_TEXT
39
40
41;;
42; memset taking a far pointer.
43;
44; cx, es may be modified; di is preserved
45;
46; @returns dx:ax unchanged.
47; @param dx:ax Pointer to the memory.
48; @param bl The fill value.
49; @param cx The number of bytes to fill.
50;
51_fmemset_:
52 push di
53
54 mov es, dx
55 mov di, ax
56 xchg al, bl
57 rep stosb
58 xchg al, bl
59
60 pop di
61 ret
62
63_TEXT ends
64 end
65
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