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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - <altivec.h> is missing vec_sel(vector [un]signed long long, ...)"
href="https://bugs.llvm.org/show_bug.cgi?id=43337">43337</a>
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<th>Summary</th>
<td><altivec.h> is missing vec_sel(vector [un]signed long long, ...)
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Headers
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
</td>
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>The following overloads of vec_sel are missing from <altivec.h>:
vector signed long long vec_sel(vector signed long long,
vector signed long long,
vector bool long long);
vector signed long long vec_sel(vector signed long long,
vector signed long long,
vector unsigned long long);
vector unsigned long long vec_sel(vector unsigned long long,
vector unsigned long long,
vector bool long long);
vector unsigned long long vec_sel(vector unsigned long long,
vector unsigned long long,
vector unsigned long long);
Worse, the PPC wrapper <emmintrin.h> relies on one of these in the
implementation of _mm_sll_epi64.
We currently "get away with" this due to the broken default of
-flax-vector-conversions, but builds using <emmintrin.h> under Power8 fail with
-fno-lax-vector-conversions due to this (and other bugs in our intrinsics
headers).</pre>
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