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<h4 class="subsection">9.11.1 D10V Options</h4>

<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
dependent options.

     <dl>
<dt>&lsquo;<samp><span class="samp">-O</span></samp>&rsquo;<dd>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. 
<br><dt>&lsquo;<samp><span class="samp">--nowarnswap</span></samp>&rsquo;<dd>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. 
<br><dt>&lsquo;<samp><span class="samp">--gstabs-packing</span></samp>&rsquo;<dt>&lsquo;<samp><span class="samp">--no-gstabs-packing</span></samp>&rsquo;<dd><code>as</code> packs adjacent short instructions into a single packed
instruction. &lsquo;<samp><span class="samp">--no-gstabs-packing</span></samp>&rsquo; turns instruction packing off if
&lsquo;<samp><span class="samp">--gstabs</span></samp>&rsquo; is specified as well; &lsquo;<samp><span class="samp">--gstabs-packing</span></samp>&rsquo; (the
default) turns instruction packing on even when &lsquo;<samp><span class="samp">--gstabs</span></samp>&rsquo; is
specified. 
</dl>

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