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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Add support for '__builtin_ia32_sqrtps_nr256’"
href="http://llvm.org/bugs/show_bug.cgi?id=16403">16403</a>
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<th>Summary</th>
<td>Add support for '__builtin_ia32_sqrtps_nr256’
</td>
</tr>
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<th>Product</th>
<td>dragonegg
</td>
</tr>
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<th>Version</th>
<td>unspecified
</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>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>New Bugs
</td>
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<th>Assignee</th>
<td>baldrick@free.fr
</td>
</tr>
<tr>
<th>Reporter</th>
<td>thomas.braun@virtuell-zuhause.de
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following code snippet
#########
#include <math.h>
float calc(float *x)
{
float sum;
for (int j = 0; j < 1024; j++)
{
const float drSquared = x[j] * x[j];
sum += 1.0f / (drSquared * sqrtf(drSquared));
}
return sum; // ensure it is not optimized away
}
#########
saved as loop.c can not be compiled using
####
gcc-4.8 -lm -fplugin=/home/thomas/devel/dragonegg-3.3.src-gcc-4.8/dragonegg.so
-std=c99 -O3 -ffast-math -march=corei7-avx
-fplugin-arg-dragonegg-enable-gcc-optzns loop.c -S -o dragonegg-with-gcc-opts.s
####
because of
####
loop.c: In function ‘calc’:
loop.c:9:43: error: unsupported target builtin ‘__builtin_ia32_sqrtps_nr256’
use
####
Compiling with gcc 4.8, clang 3.3 or without the
-fplugin-arg-dragonegg-enable-gcc-optzns flag works.
Versions:
#####
gcc-4.8 (Debian 4.8.1-3) 4.8.1
dragonegg-3.3 compiled from source
clang --version
Debian clang version 3.3-1 (branches/release_33) (based on LLVM 3.3)
Target: x86_64-pc-linux-gnu
Thread model: posix
debian unstable
####
Thanks for reading
Thomas</pre>
</div>
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