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<h4 class="subsection">6.58.11 FR-V Built-in Functions</h4>
<p>GCC provides many FR-V-specific built-in functions. In general,
these functions are intended to be compatible with those described
by <cite>FR-V Family, Softune C/C++ Compiler Manual (V6), Fujitsu
Semiconductor</cite>. The two exceptions are <code>__MDUNPACKH</code> and
<code>__MBTOHE</code>, the GCC forms of which pass 128-bit values by
pointer rather than by value.
<p>Most of the functions are named after specific FR-V instructions.
Such functions are said to be &ldquo;directly mapped&rdquo; and are summarized
here in tabular form.
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<li><a accesskey="4" href="Raw-read_002fwrite-Functions.html#Raw-read_002fwrite-Functions">Raw read/write Functions</a>
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