inst_s98.htm

来自「ST20 Embedded Toolset R2.0.5用于开发基于ST20芯片」· HTM 代码 · 共 69 行

HTM
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<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta name="GENERATOR" content="Quadralay WebWorks Publisher Professional Edition 6.0.5">
<meta name="TEMPLATEBASE" content="book_html">
<meta name="LASTUPDATED" content="08/22/03 10:13:51">
<title>lend</title>

<STYLE TYPE="text/css">
<!--
	span.Signal { text-transform: uppercase; font-family: Verdana }
-->
</STYLE>

</head>

<body link="#3366CC" vlink="#9999CC" text="#000000" alink="#0000CC" bgcolor="#FFFFFF"
background="images/backgrnd.gif">

<p><img src="images/stlogo.gif" width="106" height="83" align="left"
alt="logo here!"> </p>

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<p><br clear="all">
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<blockquote>
<h2>
  <a name="1221059"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">lend</font>
</h2><hr>


<p>
  <a name="1221060"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">loop end</font>
</p>


<h3>
  <a name="1221061"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Code</font>
</h3>


<p>
  <a name="1221062"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">22 F1</font>
</p>


<h3>
  <a name="1221063"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Description</font>
</h3>


<p>
  <a name="1221064"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">Adjust loop count and index, and do a conditional jump. Initially <span class=Signal>Areg</span> contains the byte offset from the first byte following this instruction to the loop start and <span class=Signal>Breg</span> contains a pointer to a loop end data structure, the first word of which is the loop index and the second is the loop count. The count is decremented and, if the result is greater than zero, the index is incremented and a jump to the start of the loop is taken. The offset to the start of the loop is given as a positive number that is subtracted from the instruction pointer. The loop end data structure is defined in <a href="inst_s11.htm#1218402"><font  color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Section

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