Re: [Boost-bugs] [Boost C++ Libraries] #8621: erf function gives wrong results with pgcpp - PGI 10.4

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #8621: erf function gives wrong results with pgcpp - PGI 10.4
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-06-08 11:04:53

#8621: erf function gives wrong results with pgcpp - PGI 10.4
-------------------------------------------------+-------------------------
  Reporter:  Jacques Desfosses                   |      Owner:  johnmaddock
  <jacques.desfosses@…>                          |     Status:  new
      Type:  Bugs                                |  Component:  math
 Milestone:  To Be Determined                    |   Severity:  Problem
   Version:  Boost 1.53.0                        |   Keywords:  erf pgi
Resolution:                                      |
-------------------------------------------------+-------------------------

Comment (by johnmaddock):

 Thanks, the problem value is:

 {{{ Q[0] = -8.7793466483067508e+269 }}}

 With Q being initialized like this:

 {{{
          static const T Q[] = {
             1L,
             BOOST_MATH_BIG_CONSTANT(T, 53, 1.84759070983002217845),
             BOOST_MATH_BIG_CONSTANT(T, 53, 1.42628004845511324508),
             BOOST_MATH_BIG_CONSTANT(T, 53, 0.578052804889902404909),
             BOOST_MATH_BIG_CONSTANT(T, 53, 0.12385097467900864233),
             BOOST_MATH_BIG_CONSTANT(T, 53, 0.0113385233577001411017),
             BOOST_MATH_BIG_CONSTANT(T, 53, 0.337511472483094676155e-5),
          };
 }}}

 Can you take a look and see if the compiler has a problem with
 initialization from a long int?  Initialization from long and long long is
 used all over the place in Boost.Math, so while I could easily patch that
 case, it would be hard to get all of them :-(

 Besides it really should work!

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8621#comment:8>
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