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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [ppc64] int16, int8 are not supported by vec_vsx_ld/vec_vsx_st"
href="https://llvm.org/bugs/show_bug.cgi?id=26720">26720</a>
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<th>Summary</th>
<td>[ppc64] int16, int8 are not supported by vec_vsx_ld/vec_vsx_st
</td>
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<tr>
<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>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: PowerPC
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jingyuuiuc@gmail.com
</td>
</tr>
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<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>Building ffmpeg for PowerPC64LE failed because some vec_vsx_ld/vec_vsx_st
intrinsic functions are supported by GCC, but not by LLVM. Basically,
1) parameters without "__vector" type are not supported
2) int16/uint16, int8/uint8 are not supported.
For example, the error message given by LLVM is like this:
libswscale/ppc/swscale_altivec.c:46:13: note: expanded from macro 'GET_LS'
a = vec_vsx_ld(((b) << 1) + 16, s);\
^~~~~~~~~~
toolchain/bin/../lib/clang/xxx-trunk/include/altivec.h:10111:39: note:
candidate function not viable: no known conversion from 'const int16_t *' (aka
'const short *') to '__vector int const *' for 2nd argument
static vector signed int __ATTRS_o_ai vec_vsx_ld(int __a,
This page shows all vec_vsx_ld/vec_vsx_st interfaces that GCC supports:
<a href="https://gcc.gnu.org/onlinedocs/gcc-4.5.3/gcc/PowerPC-AltiVec_002fVSX-Built_002din-Functions.html">https://gcc.gnu.org/onlinedocs/gcc-4.5.3/gcc/PowerPC-AltiVec_002fVSX-Built_002din-Functions.html</a></pre>
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