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<a name="NDS32-Built_002din-Functions-1"></a>
<h4 class="subsection">6.60.20 NDS32 Built-in Functions</h4>

<p>These built-in functions are available for the NDS32 target:
</p>
<dl>
<dt><a name="index-_005f_005fbuiltin_005fnds32_005fisync"></a>Built-in Function: <em>void</em> <strong>__builtin_nds32_isync</strong> <em>(int *<var>addr</var>)</em></dt>
<dd><p>Insert an ISYNC instruction into the instruction stream where
<var>addr</var> is an instruction address for serialization.
</p></dd></dl>

<dl>
<dt><a name="index-_005f_005fbuiltin_005fnds32_005fisb"></a>Built-in Function: <em>void</em> <strong>__builtin_nds32_isb</strong> <em>(void)</em></dt>
<dd><p>Insert an ISB instruction into the instruction stream.
</p></dd></dl>

<dl>
<dt><a name="index-_005f_005fbuiltin_005fnds32_005fmfsr"></a>Built-in Function: <em>int</em> <strong>__builtin_nds32_mfsr</strong> <em>(int <var>sr</var>)</em></dt>
<dd><p>Return the content of a system register which is mapped by <var>sr</var>.
</p></dd></dl>

<dl>
<dt><a name="index-_005f_005fbuiltin_005fnds32_005fmfusr"></a>Built-in Function: <em>int</em> <strong>__builtin_nds32_mfusr</strong> <em>(int <var>usr</var>)</em></dt>
<dd><p>Return the content of a user space register which is mapped by <var>usr</var>.
</p></dd></dl>

<dl>
<dt><a name="index-_005f_005fbuiltin_005fnds32_005fmtsr"></a>Built-in Function: <em>void</em> <strong>__builtin_nds32_mtsr</strong> <em>(int <var>value</var>, int <var>sr</var>)</em></dt>
<dd><p>Move the <var>value</var> to a system register which is mapped by <var>sr</var>.
</p></dd></dl>

<dl>
<dt><a name="index-_005f_005fbuiltin_005fnds32_005fmtusr"></a>Built-in Function: <em>void</em> <strong>__builtin_nds32_mtusr</strong> <em>(int <var>value</var>, int <var>usr</var>)</em></dt>
<dd><p>Move the <var>value</var> to a user space register which is mapped by <var>usr</var>.
</p></dd></dl>

<dl>
<dt><a name="index-_005f_005fbuiltin_005fnds32_005fsetgie_005fen"></a>Built-in Function: <em>void</em> <strong>__builtin_nds32_setgie_en</strong> <em>(void)</em></dt>
<dd><p>Enable global interrupt.
</p></dd></dl>

<dl>
<dt><a name="index-_005f_005fbuiltin_005fnds32_005fsetgie_005fdis"></a>Built-in Function: <em>void</em> <strong>__builtin_nds32_setgie_dis</strong> <em>(void)</em></dt>
<dd><p>Disable global interrupt.
</p></dd></dl>


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