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<title>Using as: XStormy16 Opcodes</title>

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<a name="XStormy16-Opcodes"></a>
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<p>
Previous: <a href="XStormy16-Directives.html#XStormy16-Directives" accesskey="p" rel="prev">XStormy16 Directives</a>, Up: <a href="XSTORMY16_002dDependent.html#XSTORMY16_002dDependent" accesskey="u" rel="up">XSTORMY16-Dependent</a> &nbsp; [<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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<hr>
<a name="XStormy16-Pseudo_002dOpcodes"></a>
<h4 class="subsection">9.52.3 XStormy16 Pseudo-Opcodes</h4>

<a name="index-XStormy16-pseudo_002dopcodes"></a>
<a name="index-pseudo_002dopcodes-for-XStormy16"></a>
<p><code>as</code> implements all the standard XStormy16 opcodes.
</p>
<p><code>as</code> also implements the following pseudo ops:
</p>
<dl compact="compact">
<dd>
<a name="index-_0040lo-pseudo_002dop_002c-XStormy16"></a>
</dd>
<dt><code>@lo()</code></dt>
<dd><p>Computes the lower 16 bits of the given expression and stores it into
the immediate operand field of the given instruction.  For example:
</p>
<p>&lsquo;<samp>add r6, @lo(here - there)</samp>&rsquo;
</p>
<p>computes the difference between the address of labels &rsquo;here&rsquo; and
&rsquo;there&rsquo;, takes the lower 16 bits of this difference and adds it to
register 6.
</p>
<a name="index-_0040hi-pseudo_002dop_002c-XStormy16"></a>
</dd>
<dt><code>@hi()</code></dt>
<dd><p>Computes the higher 16 bits of the given expression and stores it into
the immediate operand field of the given instruction.  For example:
</p>
<p>&lsquo;<samp>addc r7, @hi(here - there)</samp>&rsquo;
</p>
<p>computes the difference between the address of labels &rsquo;here&rsquo; and
&rsquo;there&rsquo;, takes the upper 16 bits of this difference, shifts it down 16
bits and then adds it, along with the carry bit, to the value in
register 7.
</p>
</dd>
</dl>


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