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<body><span class="vcard"><a class="email" href="mailto:benny.kra@gmail.com" title="Benjamin Kramer <benny.kra@gmail.com>"> <span class="fn">Benjamin Kramer</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Multiplication of a float vector by -1 should be transformed to an XOR of sign bits."
href="http://llvm.org/bugs/show_bug.cgi?id=18532">bug 18532</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>benny.kra@gmail.com
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Multiplication of a float vector by -1 should be transformed to an XOR of sign bits."
href="http://llvm.org/bugs/show_bug.cgi?id=18532#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Multiplication of a float vector by -1 should be transformed to an XOR of sign bits."
href="http://llvm.org/bugs/show_bug.cgi?id=18532">bug 18532</a>
from <span class="vcard"><a class="email" href="mailto:benny.kra@gmail.com" title="Benjamin Kramer <benny.kra@gmail.com>"> <span class="fn">Benjamin Kramer</span></a>
</span></b>
<pre>With r199553:
$ cat mul.c
#include <immintrin.h>
__m128 foo(__m128 x) {
return _mm_mul_ps(x, _mm_set1_ps(-1.0f));
}
$ clang -O -S -o - mul.c
[...]
LCPI0_0:
.long 2147483648 ## float -0.000000e+00
.long 2147483648 ## float -0.000000e+00
.long 2147483648 ## float -0.000000e+00
.long 2147483648 ## float -0.000000e+00
[...]
xorps LCPI0_0(%rip), %xmm0</pre>
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