📄 ma_acc.htm
字号:
<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 10:13:44">
<title>12 Accelerating performance</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>
<table width="331" border="0" align="right" cellpadding="0" cellspacing="0">
<tr>
<td><a href="c2isetto.htm"><img src="images/navtoc.gif" width="84" height="23"
border="0" alt="TOC"> </a></td>
<td><a href="boot6.htm"><img src="images/navprev.gif" width="80" height="23"
border="0" alt="PREV"> </a></td>
<td><a href="ma_acc2.htm"><img src="images/navnext.gif" width="83" height="23"
border="0" alt="NEXT"> </a></td>
<td><a href="c2isetix.htm"><img src="images/navidx.gif" width="84" height="23"
border="0" alt="INDEX"> </a></td>
</tr>
</table>
<p><br clear="all">
</p>
<hr align="left">
<blockquote>
<h1>
<a name="1205247"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">12 Accelerating performance</font>
</h1><hr>
<p>
<a name="1205248"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The ST20-C2 provides several features for accelerating performance:</font>
</p>
<ul>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204401"> </a>memory pipelining,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204402"> </a>instruction grouping,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1204403"> </a>the workspace cache.</font></p>
</ul>
<p>
<a name="1204404"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">These are purely micro-architectural mechanisms. Whether they are present or absent in any given version of the hardware, or variations in the implementation, only affects the performance of instructions and never the functionality. From the point of view of logical correctness of the code, a programmer can ignore them.</font>
</p>
<p>
<a name="1204405"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Details of how these mechanisms are implemented vary between hardware versions, therefore the descriptions in this appendix should be taken as an example of one implementation. It is not guaranteed that all implementations have these properties.</font>
</p>
</blockquote>
<hr>
<table width="331" border="0" align="left" cellpadding="0" cellspacing="0">
<tr>
<td><a href="c2isetto.htm"><img src="images/navtoc.gif" width="84" height="23"
border="0" alt="TOC"> </a></td>
<td><a href="boot6.htm"><img src="images/navprev.gif" width="80" height="23"
border="0" alt="PREV"> </a></td>
<td><a href="ma_acc2.htm"><img src="images/navnext.gif" width="83" height="23"
border="0" alt="NEXT"> </a></td>
<td><a href="c2isetix.htm"><img src="images/navidx.gif" width="84" height="23"
border="0" alt="INDEX"> </a></td>
</tr>
</table>
<font size=1 face="Verdana, Arial, Helvetica, sans-serif"> © 1997, 2001, 2002, 2003 STMicroelectronics. All Rights Reserved.<br>
ADCS 7301761C</font>
</body>
</html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -