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99 lines
3.8 KiB
HTML
99 lines
3.8 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled "GNU Free Documentation License".
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-->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>D30V-Opts (Using as)</title>
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<meta name="description" content="D30V-Opts (Using as)">
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<meta name="keywords" content="D30V-Opts (Using as)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="D30V_002dDependent.html#D30V_002dDependent" rel="up" title="D30V-Dependent">
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<link href="D30V_002dSyntax.html#D30V_002dSyntax" rel="next" title="D30V-Syntax">
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<link href="D30V_002dDependent.html#D30V_002dDependent" rel="prev" title="D30V-Dependent">
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-->
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</style>
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</head>
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<body lang="en">
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<a name="D30V_002dOpts"></a>
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<div class="header">
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<p>
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Next: <a href="D30V_002dSyntax.html#D30V_002dSyntax" accesskey="n" rel="next">D30V-Syntax</a>, Up: <a href="D30V_002dDependent.html#D30V_002dDependent" accesskey="u" rel="up">D30V-Dependent</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="D30V-Options"></a>
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<h4 class="subsection">9.11.1 D30V Options</h4>
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<a name="index-options_002c-D30V"></a>
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<a name="index-D30V-options"></a>
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<p>The Mitsubishi D30V version of <code>as</code> has a few machine
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dependent options.
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</p>
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<dl compact="compact">
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<dt>‘<samp>-O</samp>’</dt>
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<dd><p>The D30V can often execute two sub-instructions in parallel. When this option
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is used, <code>as</code> will attempt to optimize its output by detecting when
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instructions can be executed in parallel.
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</p>
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</dd>
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<dt>‘<samp>-n</samp>’</dt>
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<dd><p>When this option is used, <code>as</code> will issue a warning every
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time it adds a nop instruction.
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</p>
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</dd>
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<dt>‘<samp>-N</samp>’</dt>
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<dd><p>When this option is used, <code>as</code> will issue a warning if it
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needs to insert a nop after a 32-bit multiply before a load or 16-bit
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multiply instruction.
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</p></dd>
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</dl>
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</body>
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</html>
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