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core/com.nokia.carbide.cpp.compiler.doc.user/html/pragmas_x86/p_use_extinst.htm
author Deepak Modgil <Deepak.Modgil@Nokia.com>
Fri, 03 Apr 2009 23:33:03 +0100
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"><html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
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<meta http-equiv="Content-Style-Type" content="text/css" />
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<meta name="LASTUPDATED" content="06/17/05 11:09:43" />
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<title>use_extinst</title>
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<link rel="StyleSheet" href="../../book.css" type="text/css"/>
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</head>
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<body bgcolor="#FFFFFF">
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<h3>use_extinst</h3>
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<p>  Controls the code generator&rsquo;s use of processor-specific instructions.</p>
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<h5>Syntax</h5>
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  <p class="code">#pragma use_extinst on | off | reset</p>
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  <h5>Targets</h5>
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  Intel x86<br />
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  <h5>Remarks</h5>
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  <p>When off, all compiler generated code is targeted to run on a 486 processor with the exception of any inline assembly which may explicitly use newer instructions.</p>
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  <p>When on, the compiler uses instructions corresponding to the target processor whenever possible.</p>
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  <p class="note"><strong>NOTE</strong> Some instruction subsets, like AMD 3DNow!, Intel&rsquo;s MMX, and Intel&rsquo;s SSE and SSE-2 instruction sets are generated only when additional options are activated.<br />
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</p>
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  <div id="footer">Copyright &copy; 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. <br>License: <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div>
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FCL/sftools/dev/ide/carbidecpp