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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - missing codegen for __builtin_signbitl for ppc_fp128"
href="http://llvm.org/bugs/show_bug.cgi?id=20691">20691</a>
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<th>Summary</th>
<td>missing codegen for __builtin_signbitl for ppc_fp128
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nlewycky@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>nlewycky@ducttape:~$ cat signbit.c
int test1(float x) { return __builtin_signbitf(x); }
int test2(double x) { return __builtin_signbit(x); }
int test3(long double x) { return __builtin_signbitl(x); }
nlewycky@ducttape:~$ llvm/Debug+Asserts/bin/clang -target powerpc64-linux-gnu
signbit.c -flto -S -o -
signbit.c:3:35: error: cannot compile this builtin function yet
int test3(long double x) { return __builtin_signbitl(x); }
^~~~~~~~~~~~~~~~~~~~~
1 error generated.
This breaks std::signbit in libstdc++ 4.9's cmath header.</pre>
</div>
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