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75 lines
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75 lines
3.6 KiB
HTML
4 years ago
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<title>Other MIPS Built-in Functions - Using the GNU Compiler Collection (GCC)</title>
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<meta name="description" content="Using the GNU Compiler Collection (GCC)">
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<link rel="up" href="Target-Builtins.html#Target-Builtins" title="Target Builtins">
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<link rel="prev" href="MIPS-Loongson-Built_002din-Functions.html#MIPS-Loongson-Built_002din-Functions" title="MIPS Loongson Built-in Functions">
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<link rel="next" href="MSP430-Built_002din-Functions.html#MSP430-Built_002din-Functions" title="MSP430 Built-in Functions">
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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<div class="node">
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<a name="Other-MIPS-Built-in-Functions"></a>
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<a name="Other-MIPS-Built_002din-Functions"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="MSP430-Built_002din-Functions.html#MSP430-Built_002din-Functions">MSP430 Built-in Functions</a>,
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Previous: <a rel="previous" accesskey="p" href="MIPS-Loongson-Built_002din-Functions.html#MIPS-Loongson-Built_002din-Functions">MIPS Loongson Built-in Functions</a>,
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Up: <a rel="up" accesskey="u" href="Target-Builtins.html#Target-Builtins">Target Builtins</a>
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<hr>
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</div>
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<h4 class="subsection">6.58.15 Other MIPS Built-in Functions</h4>
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<p>GCC provides other MIPS-specific built-in functions:
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<dl>
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<dt><code>void __builtin_mips_cache (int </code><var>op</var><code>, const volatile void *</code><var>addr</var><code>)</code><dd>Insert a ‘<samp><span class="samp">cache</span></samp>’ instruction with operands <var>op</var> and <var>addr</var>.
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GCC defines the preprocessor macro <code>___GCC_HAVE_BUILTIN_MIPS_CACHE</code>
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when this function is available.
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<br><dt><code>unsigned int __builtin_mips_get_fcsr (void)</code><dt><code>void __builtin_mips_set_fcsr (unsigned int </code><var>value</var><code>)</code><dd>Get and set the contents of the floating-point control and status register
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(FPU control register 31). These functions are only available in hard-float
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code but can be called in both MIPS16 and non-MIPS16 contexts.
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<p><code>__builtin_mips_set_fcsr</code> can be used to change any bit of the
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register except the condition codes, which GCC assumes are preserved.
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</dl>
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</body></html>
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