68 lines
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68 lines
3.2 KiB
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<title>D10V-Opts - Using as</title>
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="D10V_002dDependent.html#D10V_002dDependent" title="D10V-Dependent">
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<link rel="next" href="D10V_002dSyntax.html#D10V_002dSyntax" title="D10V-Syntax">
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<!--
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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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</head>
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<body>
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<div class="node">
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<a name="D10V-Opts"></a>
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<a name="D10V_002dOpts"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="D10V_002dSyntax.html#D10V_002dSyntax">D10V-Syntax</a>,
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Up: <a rel="up" accesskey="u" href="D10V_002dDependent.html#D10V_002dDependent">D10V-Dependent</a>
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<hr>
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</div>
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<h4 class="subsection">9.11.1 D10V Options</h4>
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<p><a name="index-options_002c-D10V-979"></a><a name="index-D10V-options-980"></a>The Mitsubishi D10V version of <code>as</code> has a few machine
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dependent options.
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<dl>
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<dt>‘<samp><span class="samp">-O</span></samp>’<dd>The D10V 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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<br><dt>‘<samp><span class="samp">--nowarnswap</span></samp>’<dd>To optimize execution performance, <code>as</code> will sometimes swap the
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order of instructions. Normally this generates a warning. When this option
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is used, no warning will be generated when instructions are swapped.
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<br><dt>‘<samp><span class="samp">--gstabs-packing</span></samp>’<dt>‘<samp><span class="samp">--no-gstabs-packing</span></samp>’<dd><code>as</code> packs adjacent short instructions into a single packed
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instruction. ‘<samp><span class="samp">--no-gstabs-packing</span></samp>’ turns instruction packing off if
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‘<samp><span class="samp">--gstabs</span></samp>’ is specified as well; ‘<samp><span class="samp">--gstabs-packing</span></samp>’ (the
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default) turns instruction packing on even when ‘<samp><span class="samp">--gstabs</span></samp>’ is
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specified.
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</dl>
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</body></html>
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