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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Missing _InterlockedCompareExchange128 intrinsic functions for ARM64"
href="https://bugs.llvm.org/show_bug.cgi?id=48283">48283</a>
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<th>Summary</th>
<td>Missing _InterlockedCompareExchange128 intrinsic functions for ARM64
</td>
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<th>Product</th>
<td>clang
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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>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>zufuliu@163.com
</td>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>split from <a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang-overlay of <intrin.h> breaks <intrin0.h> in VS 2019 version 16.8p1"
href="show_bug.cgi?id=47099">https://bugs.llvm.org/show_bug.cgi?id=47099</a>
See
<a href="https://docs.microsoft.com/en-us/cpp/intrinsics/interlockedcompareexchange128?view=msvc-160">https://docs.microsoft.com/en-us/cpp/intrinsics/interlockedcompareexchange128?view=msvc-160</a>
_InterlockedCompareExchange128, _InterlockedCompareExchange128_acq,
_InterlockedCompareExchange128_nf and _InterlockedCompareExchange128_rel are
missing from intrin.h for ARM64.
_InterlockedCompareExchange128_nf is used by Microsoft STL <atomic> header for
ARM64, see <a href="https://github.com/microsoft/STL/blob/master/stl/inc/atomic#L483">https://github.com/microsoft/STL/blob/master/stl/inc/atomic#L483</a> and
<a href="https://github.com/microsoft/STL/issues/1491">https://github.com/microsoft/STL/issues/1491</a>.</pre>
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