67 lines
3.0 KiB
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67 lines
3.0 KiB
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<title>PowerPC - Debugging with GDB</title>
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<div class="node">
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<a name="PowerPC"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Nios-II.html#Nios-II">Nios II</a>,
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Previous: <a rel="previous" accesskey="p" href="SPU.html#SPU">SPU</a>,
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Up: <a rel="up" accesskey="u" href="Architectures.html#Architectures">Architectures</a>
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</div>
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<h4 class="subsection">21.4.7 PowerPC</h4>
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<p><a name="index-PowerPC-architecture-1640"></a>
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When <span class="sc">gdb</span> is debugging the PowerPC architecture, it provides a set of
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pseudo-registers to enable inspection of 128-bit wide Decimal Floating Point
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numbers stored in the floating point registers. These values must be stored
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in two consecutive registers, always starting at an even register like
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<code>f0</code> or <code>f2</code>.
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<p>The pseudo-registers go from <code>$dl0</code> through <code>$dl15</code>, and are formed
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by joining the even/odd register pairs <code>f0</code> and <code>f1</code> for <code>$dl0</code>,
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<code>f2</code> and <code>f3</code> for <code>$dl1</code> and so on.
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<p>For POWER7 processors, <span class="sc">gdb</span> provides a set of pseudo-registers, the 64-bit
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wide Extended Floating Point Registers (‘<samp><span class="samp">f32</span></samp>’ through ‘<samp><span class="samp">f63</span></samp>’).
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</body></html>
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