<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.16"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>UbixOS V2: C:/Dev/git/UbixOS/sys/arch/i386/strcpy.S Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtreedata.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(document).ready(initResizable);
/* @license-end */</script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/searchdata.js"></script>
<script type="text/javascript" src="search/search.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">UbixOS V2
 <span id="projectnumber">2.0</span>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.16 -->
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
var searchBox = new SearchBox("searchBox", "search",false,'Search');
/* @license-end */
</script>
<script type="text/javascript" src="menudata.js"></script>
<script type="text/javascript" src="menu.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(function() {
initMenu('',true,false,'search.php','Search');
$(document).ready(function() { init_search(); });
});
/* @license-end */</script>
<div id="main-nav"></div>
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
<div id="nav-sync" class="sync"></div>
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(document).ready(function(){initNavTree('strcpy_8S_source.html','');});
/* @license-end */
</script>
<div id="doc-content">
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
onkeydown="return searchBox.OnSearchSelectKey(event)">
</div>
<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0"
name="MSearchResults" id="MSearchResults">
</iframe>
</div>
<div class="header">
<div class="headertitle">
<div class="title">strcpy.S</div> </div>
</div><!--header-->
<div class="contents">
<a href="strcpy_8S.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> /*-</div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>  * Copyright (c) 2002-2018 The UbixOS Project.</div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>  * All rights reserved.</div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>  *</div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>  * This was developed by Christopher W. Olsen for the UbixOS Project.</div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  *</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  * Redistribution and use in source and binary forms, with or without modification, are permitted</div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  * provided that the following conditions are met:</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  *</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  * 1) Redistributions of source code must retain the above copyright notice, this list of</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  * conditions, the following disclaimer and the list of authors.</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  * 2) Redistributions in binary form must reproduce the above copyright notice, this list of</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  * conditions, the following disclaimer and the list of authors in the documentation and/or</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  * other materials provided with the distribution.</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  * endorse or promote products derived from this software without specific prior written</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  * permission.</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  *</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  */</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  #include <i386/asmacros.h></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  ENTRY(strcpy)</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  movl 4(%esp),%ecx /* dst address */</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  movl 8(%esp),%edx /* src address */</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  pushl %ecx /* push dst address */</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  .align 2,0x90</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> L1: movb (%edx),%al /* unroll loop, but not too much */</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  movb %al,(%ecx)</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  testb %al,%al</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  je L2</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  movb 1(%edx),%al</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  movb %al,1(%ecx)</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  testb %al,%al</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  je L2</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  movb 2(%edx),%al</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  movb %al,2(%ecx)</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  testb %al,%al</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  je L2</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  movb 3(%edx),%al</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  movb %al,3(%ecx)</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  testb %al,%al</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  je L2</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  movb 4(%edx),%al</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  movb %al,4(%ecx)</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  testb %al,%al</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  je L2</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  movb 5(%edx),%al</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  movb %al,5(%ecx)</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  testb %al,%al</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  je L2</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  movb 6(%edx),%al</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  movb %al,6(%ecx)</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  testb %al,%al</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  je L2</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  movb 7(%edx),%al</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  movb %al,7(%ecx)</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  addl $8,%edx</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  addl $8,%ecx</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  testb %al,%al</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  jne L1</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> L2: popl %eax /* pop dst address */</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  ret</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> END(strcpy)</div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<!-- start footer part -->
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
<ul>
<li class="navelem"><a class="el" href="dir_e6bb53534ac0e427887cf7a94c0c004e.html">C:</a></li><li class="navelem"><a class="el" href="dir_d99d5d4662bf24521eef49da6a8cd34d.html">Dev</a></li><li class="navelem"><a class="el" href="dir_474a4b306371cf7e7f6fa12cb0b77df6.html">git</a></li><li class="navelem"><a class="el" href="dir_849109bbd106d461b128d63e5babcedf.html">UbixOS</a></li><li class="navelem"><a class="el" href="dir_6ec99f6d7d5182ba8913209ab70c9f18.html">sys</a></li><li class="navelem"><a class="el" href="dir_316bf5fdacfa44a7db12b020a0d9ab19.html">arch</a></li><li class="navelem"><a class="el" href="dir_256d947363de5d2e978c467334167a28.html">i386</a></li><li class="navelem"><a class="el" href="strcpy_8S.html">strcpy.S</a></li>
<li class="footer">Generated by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.16 </li>
</ul>
</div>
</body>
</html>
