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From "Travis Vitek (Issue Comment Edited) (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Edited] (STDCXX-1061) std::valarray<>::operator&& () produces wrong result
Date Wed, 08 Feb 2012 22:04:59 GMT

    [ https://issues.apache.org/jira/browse/STDCXX-1061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13204044#comment-13204044
] 

Travis Vitek edited comment on STDCXX-1061 at 2/8/12 10:04 PM:
---------------------------------------------------------------

Committed as [r1242128|http://svn.apache.org/viewvc?view=revision&revision=1242128].
                
      was (Author: vitek):
    Comitted as [r1242128|http://svn.apache.org/viewvc?view=revision&revision=1242128].
                  
> std::valarray<>::operator&& () produces wrong result
> ----------------------------------------------------
>
>                 Key: STDCXX-1061
>                 URL: https://issues.apache.org/jira/browse/STDCXX-1061
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: 23. Containers
>    Affects Versions: 4.2.1
>         Environment: Solaris 10 and 11
> Red Hat Linux
> OpenSuSE Linux
> SunPro C++ 12.1, 12.2, 12.3
> Defect is independent of platform and/or compiler.
>            Reporter: Stefan Teleman
>            Assignee: Travis Vitek
>              Labels: conformance, standards
>             Fix For: 4.2.x, 4.3.x, 5.0.0
>
>         Attachments: stdcxx-1061.patch
>
>
> std::valarray<>::operator&& () produces wrong result:
> {code:title=test.cc|borderStyle=solid}
> #include <iostream>
> #include <valarray>
> static const size_t maxlen = 10;
> void print(const std::valarray<bool>& v)
> {
>     for (size_t i = 0; i < maxlen; ++i)
>         std::cerr << v[i] << " ";
>     std::cerr << std::endl;
> }
> int main()
> {
>     int nonzero[maxlen] = { 0, 1, 0, 3, 0, -5, 0, -7, 0, -11 };
>     int one = 1;
>     int ret = 0;
>     size_t i;
>     std::valarray<int> v0 (nonzero, maxlen);
>     std::valarray<bool> v3 (maxlen);
>     for (i = 0; i < maxlen; i++)
>         v3[i] = nonzero[i] && one;
>     std::valarray<bool> v1 = std::operator&& (v0, one);
>     for (i = 0; i < maxlen; i++)
>     {
>         if ((nonzero[i] && one) != v1[i])
>             ret = 1;
>     }
>     if (ret)
>     {
>         std::cerr << "expected: ";
>         print (v3);
>         std::cerr << "got: ";
>         print (v1);
>     }
>     return ret;
> }
> {code}
> 1. Output from GCC 4.5.0:
> {noformat}
> [steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/nothrow][02/08/2012
13:22:47][2463]>> ./v-gcc
> [steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/nothrow][02/08/2012
13:23:01][2464]>> echo $status
> 0
> {noformat}
> 2. Output from SunPro C++ 12.2 with stlport4:
> {noformat}
> [steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/nothrow][02/08/2012
13:23:02][2465]>> ./v-ss122-stlport
> [steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/nothrow][02/08/2012
13:23:08][2466]>> echo $status
> 0
> {noformat}
> 3. Output from SunPro C++ 12.2 with our patched stdcxx:
> {noformat}
> [steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/nothrow][02/08/2012
13:23:10][2467]>> ./v-ss122-stdcxx
> [steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/nothrow][02/08/2012
13:23:18][2468]>> echo $status
> 0
> {noformat}
> 4. Output from Pathscale 4.0.12.1 (which didn't patch stdcxx):
> {noformat}
> [steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/nothrow][02/08/2012
13:23:20][2469]>> ./v-pathscale
> expected: 0 1 0 1 0 1 0 1 0 1 
> got: 0 1 0 0 0 0 0 0 0 0 
> [steleman@darthvader][/src/steleman/programming/stdcxx-ss122/bugfixes-sunw/nothrow][02/08/2012
13:23:24][2470]>> echo $status
> 1
> {noformat}
> Patch for stdcxx 4.2.1 to follow shortly.

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