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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - vcvtq_u32_f32 gives wrong results for out of range values on ARM"
href="https://bugs.llvm.org/show_bug.cgi?id=47510">47510</a>
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<th>Summary</th>
<td>vcvtq_u32_f32 gives wrong results for out of range values on ARM
</td>
</tr>
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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
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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>LLVM Codegen
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>jmuizelaar@mozilla.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>int f() {
float32x4_t k ={ 10e33, 0, 0, 0} ;
return vgetq_lane_u32(vcvtq_u32_f32 (k), 0);
}
gives
define i32 @_Z1fv() local_unnamed_addr #0 {
ret i32 undef
}
Instead, it should give INT_MAX.
on AARCH64 this is correctly compiled to:
define dso_local i32 @_Z1fv() local_unnamed_addr #0 {
%1 = tail call <4 x i32> @llvm.aarch64.neon.fcvtzu.v4i32.v4f32(<4 x float>
<float 0x46FED09BE0000000, float 0.000000e+00, float 0.000000e+00, float
0.000000e+00>) #2
%2 = extractelement <4 x i32> %1, i32 0
ret i32 %2
}</pre>
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