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<h4 class="section">ARC Machine Directives</h4>
<p>The ARC version of <code>as</code> supports the following additional
machine directives:
<dl>
<br><dt><code>.2byte </code><var>expressions</var><code></code>
<dd>*TODO*
<br><dt><code>.3byte </code><var>expressions</var><code></code>
<dd>*TODO*
<br><dt><code>.4byte </code><var>expressions</var><code></code>
<dd>*TODO*
<br><dt><code>.extAuxRegister </code><var>name</var><code>,</code><var>address</var><code>,</code><var>mode</var><code></code>
<dd>*TODO*
<pre class="smallexample"> .extAuxRegister mulhi,0x12,w
</pre>
<br><dt><code>.extCondCode </code><var>suffix</var><code>,</code><var>value</var><code></code>
<dd>*TODO*
<pre class="smallexample"> .extCondCode is_busy,0x14
</pre>
<br><dt><code>.extCoreRegister </code><var>name</var><code>,</code><var>regnum</var><code>,</code><var>mode</var><code>,</code><var>shortcut</var><code></code>
<dd>*TODO*
<pre class="smallexample"> .extCoreRegister mlo,57,r,can_shortcut
</pre>
<br><dt><code>.extInstruction </code><var>name</var><code>,</code><var>opcode</var><code>,</code><var>subopcode</var><code>,</code><var>suffixclass</var><code>,</code><var>syntaxclass</var><code></code>
<dd>*TODO*
<pre class="smallexample"> .extInstruction mul64,0x14,0x0,SUFFIX_COND,SYNTAX_3OP|OP1_MUST_BE_IMM
</pre>
<br><dt><code>.half </code><var>expressions</var><code></code>
<dd>*TODO*
<br><dt><code>.long </code><var>expressions</var><code></code>
<dd>*TODO*
<br><dt><code>.option </code><var>arc|arc5|arc6|arc7|arc8</var><code></code>
<dd>The <code>.option</code> directive must be followed by the desired core
version. Again <code>arc</code> is an alias for
<code>arc6</code>.
<p>Note: the <code>.option</code> directive overrides the command line option
<code>-marc</code>; a warning is emitted when the version is not consistent
between the two - even for the implicit default core version
(arc6).
<br><dt><code>.short </code><var>expressions</var><code></code>
<dd>*TODO*
<br><dt><code>.word </code><var>expressions</var><code></code>
<dd>*TODO*
</dl>
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