<html lang="en"> <head> <title>D30V-Opts - Using as</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="Using as"> <meta name="generator" content="makeinfo 4.7"> <link title="Top" rel="start" href="index.html#Top"> <link rel="up" href="D30V_002dDependent.html#D30V_002dDependent" title="D30V-Dependent"> <link rel="next" href="D30V_002dSyntax.html#D30V_002dSyntax" title="D30V-Syntax"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <!-- This file documents the GNU Assembler "as". Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002, 2006, 2007 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled ``GNU Free Documentation License''. man end--> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family: serif; font-weight: normal; } --></style> </head> <body> <div class="node"> <p> <a name="D30V_002dOpts"></a>Next: <a rel="next" accesskey="n" href="D30V_002dSyntax.html#D30V_002dSyntax">D30V-Syntax</a>, Up: <a rel="up" accesskey="u" href="D30V_002dDependent.html#D30V_002dDependent">D30V-Dependent</a> <hr><br> </div> <h4 class="subsection">9.9.1 D30V Options</h4> <p><a name="index-options_002c-D30V-750"></a><a name="index-D30V-options-751"></a>The Mitsubishi D30V version of <code>as</code> has a few machine dependent options. <dl> <dt><span class="samp">-O</span><dd>The D30V can often execute two sub-instructions in parallel. When this option is used, <code>as</code> will attempt to optimize its output by detecting when instructions can be executed in parallel. <br><dt><span class="samp">-n</span><dd>When this option is used, <code>as</code> will issue a warning every time it adds a nop instruction. <br><dt><span class="samp">-N</span><dd>When this option is used, <code>as</code> will issue a warning if it needs to insert a nop after a 32-bit multiply before a load or 16-bit multiply instruction. </dl> </body></html>