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| <h4 class="subsection">6.57.17 Other MIPS Built-in Functions</h4> |
| |
| <p>GCC provides other MIPS-specific built-in functions: |
| </p> |
| <dl compact="compact"> |
| <dt><code>void __builtin_mips_cache (int <var>op</var>, const volatile void *<var>addr</var>)</code></dt> |
| <dd><p>Insert a ‘<samp>cache</samp>’ instruction with operands <var>op</var> and <var>addr</var>. |
| GCC defines the preprocessor macro <code>___GCC_HAVE_BUILTIN_MIPS_CACHE</code> |
| when this function is available. |
| </p> |
| </dd> |
| <dt><code>unsigned int __builtin_mips_get_fcsr (void)</code></dt> |
| <dt><code>void __builtin_mips_set_fcsr (unsigned int <var>value</var>)</code></dt> |
| <dd><p>Get and set the contents of the floating-point control and status register |
| (FPU control register 31). These functions are only available in hard-float |
| code but can be called in both MIPS16 and non-MIPS16 contexts. |
| </p> |
| <p><code>__builtin_mips_set_fcsr</code> can be used to change any bit of the |
| register except the condition codes, which GCC assumes are preserved. |
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