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<h5 class="subsubsection">6.58.11.5 Other Built-in Functions</h5>
<p>This section describes built-in functions that are not named after
a specific FR-V instruction.
<dl>
<dt><code>sw2 __IACCreadll (iacc </code><var>reg</var><code>)</code><dd>Return the full 64-bit value of IACC0. The <var>reg</var> argument is reserved
for future expansion and must be 0.
<br><dt><code>sw1 __IACCreadl (iacc </code><var>reg</var><code>)</code><dd>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.
<br><dt><code>void __IACCsetll (iacc </code><var>reg</var><code>, sw2 </code><var>x</var><code>)</code><dd>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.
<br><dt><code>void __IACCsetl (iacc </code><var>reg</var><code>, sw1 </code><var>x</var><code>)</code><dd>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.
<br><dt><code>void __data_prefetch0 (const void *</code><var>x</var><code>)</code><dd>Use the <code>dcpl</code> instruction to load the contents of address <var>x</var>
into the data cache.
<br><dt><code>void __data_prefetch (const void *</code><var>x</var><code>)</code><dd>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.
</dl>
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