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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang 7.0 missing Power9 __builtin_darn and friends"
href="https://bugs.llvm.org/show_bug.cgi?id=39800">39800</a>
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<th>Summary</th>
<td>Clang 7.0 missing Power9 __builtin_darn and friends
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>7.0
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>other
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: PowerPC
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>noloader@gmail.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, nemanja.i.ibm@gmail.com
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<p>
<div>
<pre>My apologies if this is the wrong classification.
Clang 7.0 is missing Power9 builtins that GCC provides. I also happen to want
to use 3 of them.
Grepping the LLVM 7.0 source code:
llvm_source$ cat llvm/test/MC/PowerPC/ppc64-encoding.s | grep darn -B 1 -A 1
# CHECK-BE: darn 2, 3 # encoding: [0x7c,0x43,0x05,0xe6]
# CHECK-LE: darn 2, 3 # encoding: [0xe6,0x05,0x43,0x7c]
darn 2, 3
However, I can't seen to find the builtin:
llvm_source$ grep -IR darn | grep builtin
llvm_source$
The builtins I am looking for are:
long long __builtin_darn (void);
long long __builtin_darn_raw (void);
int __builtin_darn_32 (void);
It would be nice to see some of them make it into Clang 7.0.1. (Re:
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Clang 7.0 claims unaligned load with POWER7 vec_xl"
href="show_bug.cgi?id=39704">https://bugs.llvm.org/show_bug.cgi?id=39704</a>).
Also see
<a href="https://gcc.gnu.org/onlinedocs/gcc/Basic-PowerPC-Built-in-Functions-Available-on-ISA-3_002e0.html">https://gcc.gnu.org/onlinedocs/gcc/Basic-PowerPC-Built-in-Functions-Available-on-ISA-3_002e0.html</a>
and <a href="https://stackoverflow.com/q/53491053/608639">https://stackoverflow.com/q/53491053/608639</a> .</pre>
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