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| <h4 class="subsection">21.3.5 <acronym>MIPS</acronym> Embedded</h4> |
| |
| <p class="noindent"><span class="sc">gdb</span> supports these special commands for <acronym>MIPS</acronym> targets: |
| |
| <dl> |
| <dt><code>set mipsfpu double</code><dt><code>set mipsfpu single</code><dt><code>set mipsfpu none</code><dt><code>set mipsfpu auto</code><dt><code>show mipsfpu</code><dd><a name="index-set-mipsfpu-1583"></a><a name="index-show-mipsfpu-1584"></a><a name="index-g_t_0040acronym_007bMIPS_007d-remote-floating-point-1585"></a><a name="index-floating-point_002c-_0040acronym_007bMIPS_007d-remote-1586"></a>If your target board does not support the <acronym>MIPS</acronym> floating point |
| coprocessor, you should use the command ‘<samp><span class="samp">set mipsfpu none</span></samp>’ (if you |
| need this, you may wish to put the command in your <span class="sc">gdb</span> init |
| file). This tells <span class="sc">gdb</span> how to find the return value of |
| functions which return floating point values. It also allows |
| <span class="sc">gdb</span> to avoid saving the floating point registers when calling |
| functions on the board. If you are using a floating point coprocessor |
| with only single precision floating point support, as on the <span class="sc">r4650</span> |
| processor, use the command ‘<samp><span class="samp">set mipsfpu single</span></samp>’. The default |
| double precision floating point coprocessor may be selected using |
| ‘<samp><span class="samp">set mipsfpu double</span></samp>’. |
| |
| <p>In previous versions the only choices were double precision or no |
| floating point, so ‘<samp><span class="samp">set mipsfpu on</span></samp>’ will select double precision |
| and ‘<samp><span class="samp">set mipsfpu off</span></samp>’ will select no floating point. |
| |
| <p>As usual, you can inquire about the <code>mipsfpu</code> variable with |
| ‘<samp><span class="samp">show mipsfpu</span></samp>’. |
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