101 lines
4.9 KiB
HTML
101 lines
4.9 KiB
HTML
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<title>Using the GNU Compiler Collection (GCC): Raw read/write Functions</title>
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Next: <a href="Other-Built_002din-Functions.html#Other-Built_002din-Functions" accesskey="n" rel="next">Other Built-in Functions</a>, Previous: <a href="Directly_002dmapped-Media-Functions.html#Directly_002dmapped-Media-Functions" accesskey="p" rel="prev">Directly-mapped Media Functions</a>, Up: <a href="FR_002dV-Built_002din-Functions.html#FR_002dV-Built_002din-Functions" accesskey="u" rel="up">FR-V Built-in Functions</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Raw-Read_002fWrite-Functions"></a>
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<h4 class="subsubsection">6.59.12.4 Raw Read/Write Functions</h4>
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<p>This sections describes built-in functions related to read and write
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instructions to access memory. These functions generate
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<code>membar</code> instructions to flush the I/O load and stores where
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appropriate, as described in Fujitsu’s manual described above.
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</p>
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<dl compact="compact">
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<dt><code>unsigned char __builtin_read8 (void *<var>data</var>)</code></dt>
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<dt><code>unsigned short __builtin_read16 (void *<var>data</var>)</code></dt>
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<dt><code>unsigned long __builtin_read32 (void *<var>data</var>)</code></dt>
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<dt><code>unsigned long long __builtin_read64 (void *<var>data</var>)</code></dt>
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<dt><code>void __builtin_write8 (void *<var>data</var>, unsigned char <var>datum</var>)</code></dt>
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<dt><code>void __builtin_write16 (void *<var>data</var>, unsigned short <var>datum</var>)</code></dt>
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<dt><code>void __builtin_write32 (void *<var>data</var>, unsigned long <var>datum</var>)</code></dt>
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<dt><code>void __builtin_write64 (void *<var>data</var>, unsigned long long <var>datum</var>)</code></dt>
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</dl>
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