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<title>Using as: D10V-Opts</title>
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<a name="D10V_002dOpts"></a>
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Next: <a href="D10V_002dSyntax.html#D10V_002dSyntax" accesskey="n" rel="next">D10V-Syntax</a>, Up: <a href="D10V_002dDependent.html#D10V_002dDependent" accesskey="u" rel="up">D10V-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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<a name="D10V-Options"></a>
<h4 class="subsection">9.9.1 D10V Options</h4>
<a name="index-options_002c-D10V"></a>
<a name="index-D10V-options"></a>
<p>The Mitsubishi D10V version of <code>as</code> has a few machine
dependent options.
</p>
<dl compact="compact">
<dt>‘<samp>-O</samp>’</dt>
<dd><p>The D10V 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.
</p></dd>
<dt>‘<samp>--nowarnswap</samp>’</dt>
<dd><p>To optimize execution performance, <code>as</code> will sometimes swap the
order of instructions. Normally this generates a warning. When this option
is used, no warning will be generated when instructions are swapped.
</p></dd>
<dt>‘<samp>--gstabs-packing</samp>’</dt>
<dt>‘<samp>--no-gstabs-packing</samp>’</dt>
<dd><p><code>as</code> packs adjacent short instructions into a single packed
instruction. ‘<samp>--no-gstabs-packing</samp>’ turns instruction packing off if
‘<samp>--gstabs</samp>’ is specified as well; ‘<samp>--gstabs-packing</samp>’ (the
default) turns instruction packing on even when ‘<samp>--gstabs</samp>’ is
specified.
</p></dd>
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