<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Failure to simplify floor(float(int x)) -> float(int x)"
href="https://bugs.llvm.org/show_bug.cgi?id=39477">39477</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Failure to simplify floor(float(int x)) -> float(int x)
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>llvm-dev@redking.me.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>filcab@gmail.com, llvm-bugs@lists.llvm.org, spatel+llvm@rotateright.com, tilkax@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>#include <math.h>
float floor_s32(int a)
{
return floorf(a);
}
double floor_s64(long long a)
{
return floor(a);
}
-O3 -march=btver2
<a href="https://godbolt.org/z/3xAI3L">https://godbolt.org/z/3xAI3L</a>
clang:
_Z9floor_s32i: # @_Z9floor_s32i
vcvtsi2ssl %edi, %xmm0, %xmm0
vroundss $9, %xmm0, %xmm0, %xmm0
retq
_Z9floor_s64x: # @_Z9floor_s64x
vcvtsi2sdq %rdi, %xmm0, %xmm0
vroundsd $9, %xmm0, %xmm0, %xmm0
retq
gcc:
_Z9floor_s32i:
vcvtsi2ss %edi, %xmm0, %xmm0
ret
_Z9floor_s64x:
vcvtsi2sdq %rdi, %xmm0, %xmm0
ret</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>