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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Use SIMD to expand memchr"
href="https://bugs.llvm.org/show_bug.cgi?id=52272">52272</a>
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<th>Summary</th>
<td>Use SIMD to expand memchr
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</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>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>david.bolvansky@gmail.com
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, pengfei.wang@intel.com, spatel+llvm@rotateright.com
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<p>
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<pre>int* findK(int k, const int* v, unsigned long long n)
{
return(int*)__builtin_memchr(v, k, 32);
}
findK(int, int const*, unsigned long long):
mov r8d, edi
mov edx, 32
mov rdi, rsi
mov esi, r8d
jmp memchr
Better to use SIMD than libcall for some reasonable N?</pre>
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