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<title>Using the GNU Compiler Collection (GCC): Other Built-in Functions</title>

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<a name="Other-Built_002din-Functions-1"></a>
<h4 class="subsubsection">6.60.12.5 Other Built-in Functions</h4>

<p>This section describes built-in functions that are not named after
a specific FR-V instruction.
</p>
<dl compact="compact">
<dt><code>sw2 __IACCreadll (iacc <var>reg</var>)</code></dt>
<dd><p>Return the full 64-bit value of IACC0.  The <var>reg</var> argument is reserved
for future expansion and must be 0.
</p>
</dd>
<dt><code>sw1 __IACCreadl (iacc <var>reg</var>)</code></dt>
<dd><p>Return the value of IACC0H if <var>reg</var> is 0 and IACC0L if <var>reg</var> is 1.
Other values of <var>reg</var> are rejected as invalid.
</p>
</dd>
<dt><code>void __IACCsetll (iacc <var>reg</var>, sw2 <var>x</var>)</code></dt>
<dd><p>Set the full 64-bit value of IACC0 to <var>x</var>.  The <var>reg</var> argument
is reserved for future expansion and must be 0.
</p>
</dd>
<dt><code>void __IACCsetl (iacc <var>reg</var>, sw1 <var>x</var>)</code></dt>
<dd><p>Set IACC0H to <var>x</var> if <var>reg</var> is 0 and IACC0L to <var>x</var> if <var>reg</var>
is 1.  Other values of <var>reg</var> are rejected as invalid.
</p>
</dd>
<dt><code>void __data_prefetch0 (const void *<var>x</var>)</code></dt>
<dd><p>Use the <code>dcpl</code> instruction to load the contents of address <var>x</var>
into the data cache.
</p>
</dd>
<dt><code>void __data_prefetch (const void *<var>x</var>)</code></dt>
<dd><p>Use the <code>nldub</code> instruction to load the contents of address <var>x</var>
into the data cache.  The instruction is issued in slot I1.
</p></dd>
</dl>


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