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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - cvttpd2dq is not generated for <2 x double> to <2 x i32> casts"
href="https://llvm.org/bugs/show_bug.cgi?id=28461">28461</a>
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<th>Summary</th>
<td>cvttpd2dq is not generated for <2 x double> to <2 x i32> casts
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Backend: X86
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>mkuper@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>For:
define <2 x i32> @foo(<2 x double> %arg) {
%ret = fptosi <2 x double> %arg to <2 x i32>
ret <2 x i32> %ret
}
We produce, with llc -matr=+sse4.2:
cvttsd2si %xmm0, %rax
movd %rax, %xmm1
shufpd $1, %xmm0, %xmm0 # xmm0 = xmm0[1,0]
cvttsd2si %xmm0, %rax
movd %rax, %xmm0
punpcklqdq %xmm0, %xmm1 # xmm1 = xmm1[0],xmm0[0]
movdqa %xmm1, %xmm0
retq</pre>
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