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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [X86] Legacy scalar sqrt, rsqrt, and rcp intrinsics should select EVEX instructions when available"
href="https://bugs.llvm.org/show_bug.cgi?id=35161">35161</a>
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<th>Summary</th>
<td>[X86] Legacy scalar sqrt, rsqrt, and rcp intrinsics should select EVEX instructions when available
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<th>Product</th>
<td>libraries
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
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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
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>craig.topper@gmail.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<pre>int_x86_sse_rcp_ss, int_x86_sse_rsqrt_ss, int_x86_sse_sqrt_ss, and
int_x86_sse2_sqrt_sd should use EVEX instructions when possible.
RCP and RSQRT may require more thought. The EVEX versions come in 2 precisions
and we don't EVEX->VEX either of those. Though we do use RSQRT14/RCP14 for the
packed legacy intrinsics with AVX512VL</pre>
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