</div>
<!-- ======================================================================= -->
<div class="doc_subsection">
- <a name="implementRegister">Implement a subclass of
- <a href="http://www.llvm.org/docs/CodeGenerator.html#targetregisterinfo">TargetRegisterInfo</a></a>
+ <a name="implementRegister">Implement a subclass of</a>
+ <a href="http://www.llvm.org/docs/CodeGenerator.html#targetregisterinfo">TargetRegisterInfo</a>
</div>
<div class="doc_text">
<p>The final step is to hand code portions of XXXRegisterInfo, which
<!-- ======================================================================= -->
<div class="doc_subsection">
- <a name="implementInstr">Implement a subclass of
- <a href="http://www.llvm.org/docs/CodeGenerator.html#targetinstrinfo">TargetInstrInfo</a></a>
+ <a name="implementInstr">Implement a subclass of </a>
+ <a href="http://www.llvm.org/docs/CodeGenerator.html#targetinstrinfo">TargetInstrInfo</a>
</div>
<div class="doc_text">
<p>You should examine the node types in the ISD namespace
(<tt>include/llvm/CodeGen/SelectionDAGNodes.h</tt>)
and determine which operations the target natively supports. For operations
-that do <u>not</u> have native support, add a callback to the constructor for
+that do <b>not</b> have native support, add a callback to the constructor for
the XXXTargetLowering class, so the instruction selection process knows what to
do. The TargetLowering class callback methods (declared in
<tt>llvm/Target/TargetLowering.h</tt>) are:</p>
</div>
<div class="doc_text">
<p>The <tt>Legal</tt> LegalizeAction enum value simply indicates that an
-operation <u>is</u> natively supported. <tt>Legal</tt> represents the default condition,
+operation <b>is</b> natively supported. <tt>Legal</tt> represents the default condition,
so it is rarely used. In <tt>SparcISelLowering.cpp</tt>, the action for CTPOP (an
operation to count the bits set in an integer) is natively supported only for
SPARC v9. The following code enables the <tt>Expand</tt> conversion technique for non-v9
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<a href="http://www.woo.com">Mason Woo</a> and <a href="http://misha.brukman.net">Misha Brukman</a><br>
<a href="http://llvm.org">The LLVM Compiler Infrastructure</a>