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<base href="http://bugzilla.scilab.org/" />
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<th>Reporter</th>
<td>sgougeon@free.fr</td>
</tr>
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Trouble with int64() around int64(%inf)-"
href="http://bugzilla.scilab.org/show_bug.cgi?id=15505">15505</a>
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<th>Summary</th>
<td>Trouble with int64() around int64(%inf)-
</td>
</tr>
<tr>
<th>Product</th>
<td>Scilab software
</td>
</tr>
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<th>Version</th>
<td>6.0.1
</td>
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<th>OS</th>
<td>All OS
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Minor
</td>
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<th>Component</th>
<td>Numerical Math
</td>
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<th>Assignee</th>
<td>bugzilla.admin@scilab.org
</td>
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<pre>BUG DESCRIPTION:
----------------
--> imax = int64(%inf)
imax =
9223372036854775807
--> x = 2^63-1;
--> x <= imax
ans =
T
--> int64(x)
ans =
-9223372036854775808 <<<< Should be imax, not wrapped, since <= imax(int64)!
It's OK for the floor:
---------------------
--> imin = int64(-%inf)
imin =
-9223372036854775808
--> x=-(2^63)
x =
-9.223D+18
--> x >= imin
ans =
T
--> int64(x)
ans =
-9223372036854775808 <<<< OK: not wrapped
There is some trouble with uint64() as well around uint64(%inf), but distinct => reported apart.
ERROR LOG:
----------
none. wrong behavior
HOW TO REPRODUCE THE BUG:
-------------------------
imax = int64(%inf)
x = 2^63-1;
x <= imax
int64(x)==imax // %F == The bug
// The following is OK and should remain so:
imin = int64(-%inf)
x = -(2^63)
x >= imin
int64(x)==imin
OTHER INFORMATION:
------------------
This bug has complicated a lot the design of the unit tests
test_run compatibility_functions mtlb_int_uint</pre>
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