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Retidy, removing align=left from headings and empty paragraphs

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James Gregory 2013-12-30 15:37:13 +11:00
commit a96a114403
362 changed files with 8472 additions and 5040 deletions
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13-01.html
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@ -1,5 +1,4 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
@ -19,17 +18,21 @@
<center>
<table border="1">
<tr>
<td><a href="12-04.html">Previous</a></td>
<td>
<a href="12-04.html">Previous</a>
</td>
<td><a href="index.html">Table of Contents</a></td>
<td>
<a href="index.html">Table of Contents</a>
</td>
<td><a href="13-02.html">Next</a></td>
<td>
<a href="13-02.html">Next</a>
</td>
</tr>
</table>
</center>
<p><br /></p>
<h2 id="Heading1">Chapter 13<br />
Aiming the 486</h2>
@ -43,7 +46,7 @@
<p>For example, consider how Terje Mathisen doubled the speed of his word-counting program on a 486 simply by shuffling a couple of instructions.</p>
<h4 align="left" id="Heading3">486 Pipeline Optimization</h4>
<h4 id="Heading3">486 Pipeline Optimization</h4>
<p>I&rsquo;ve mentioned Terje Mathisen in my writings before. Terje is an assembly language programmer extraordinaire, and author of the incredibly fast public-domain word-counting program WC (which comes complete with source code; well worth a look, if you want to see what <i>really</i> fast code looks like). Terje&rsquo;s a regular participant in the ibm.pc/fast.code topic on Bix. In a thread titled &ldquo;486 Pipeline Optimization, or TANSTATFC (There Ain&rsquo;t No Such Thing As The Fastest Code),&rdquo; he detailed the following optimization to WC, perhaps the best example of 486 pipeline optimization I&rsquo;ve yet seen.</p>
@ -82,16 +85,20 @@ add dx,[bx+8000h] ;increment word and line count
<p>At this point, Terje had nearly doubled the performance of this code simply by moving one instruction. (Note that swapping the instructions also made it necessary to preload DI at the start of the loop; Listing 13.2 is not exactly equivalent to Listing 13.1.) I&rsquo;ll let Terje describe his next optimization in his own words:</p>
<p><br /></p>
<center>
<table border="1">
<tr>
<td><a href="12-04.html">Previous</a></td>
<td>
<a href="12-04.html">Previous</a>
</td>
<td><a href="index.html">Table of Contents</a></td>
<td>
<a href="index.html">Table of Contents</a>
</td>
<td><a href="13-02.html">Next</a></td>
<td>
<a href="13-02.html">Next</a>
</td>
</tr>
</table>
</center>