Re: [Boost-bugs] [Boost C++ Libraries] #4812: Bug in boost::math::special_functions::sign showing up in special_functions::bessel_jy()

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4812: Bug in boost::math::special_functions::sign showing up in special_functions::bessel_jy()
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-11-05 05:11:26

#4812: Bug in boost::math::special_functions::sign showing up in
special_functions::bessel_jy()
----------------------------------------------+-----------------------------
  Reporter:  peter zwart <PHZwart@…>          |       Owner:  johnmaddock                     
      Type:  Bugs                             |      Status:  new                             
 Milestone:  To Be Determined                 |   Component:  math                            
   Version:  Boost 1.45.0                     |    Severity:  Showstopper                     
Resolution:                                   |    Keywords:  sign sph_bessel special_function
----------------------------------------------+-----------------------------

Comment (by phzwart@…):

 Hi,


 1.

 uname -a gives

 Linux xxx.yyy.zzz.gov 2.6.33 #1 SMP Mon Mar 1 16:05:57 PST 2010
 x86_64 x86_64 x86_64 GNU/Linux

 localhost 8% g++ -v
 Using built-in specs.
 Target: x86_64-redhat-linux
 Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
 --infodir=/usr/share/info
 --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap
 --enable-shared --enable-threads=posix --enable-checking=release
 --with-system-zlib --enable-__cxa_atexit
 --disable-libunwind-exceptions
 --enable-languages=c,c++,objc,obj-c++,java,fortran,ada
 --enable-java-awt=gtk --disable-dssi --enable-plugin
 --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
 --enable-libgcj-multifile --enable-java-maintainer-mode
 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
 --disable-libjava-multilib --with-cpu=generic
 --build=x86_64-redhat-linux
 Thread model: posix
 gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC)


 2.

 fault is there:

 -1.24911e-2468    1

 3.

 this one is used:

 #ifdef BOOST_MATH_USE_STD_FPCLASSIFY
    template<class T>
    inline int signbit_impl(T x, native_tag const&)
    {
        return (std::signbit)(x);
    }
 #endif

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4812#comment:2>
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