Re: [Boost-users] Ann: Floating Point Utilities Review starts today

From: Johan Råde (rade_at_[hidden])
Date: 2008-02-27 01:35:00

Today is the last day of the Floating Point Utilities review.
So far there there have been four reviews:
Paul Bristow, Hartmut Kaiser, Zach Laine and John Phillips.

It is clear from the discussion so far that there are
many more Boosters who are interested in this problem domain.

--Johan

John Maddock wrote:
> The review of Johan Rade's floating point utilities starts today.
> 
> Code and docs can be downloaded from : 
> http://www.boost-consulting.com/vault/index.php?action=downloadfile&filename=floating_point_utilities_v3.zip&directory=Math%20-%20Numerics&
> 
> The library consists of three parts:
> 
> 1) Floating point classification routines: these are optimised 
> implementations of the C99 and C++ TR1 functions fpclassify, isinf, isnan, 
> isnormal and isfinite.  From Boost-1.35 onwards these are already a part of 
> Boost.Math (see 
> http://svn.boost.org/svn/boost/trunk/libs/math/doc/sf_and_dist/html/math_toolkit/special/fpclass.html) 
> so if accepted the two implementations will get merged.
> 
> The review here should focus on the implementation used, and testing on 
> whatever platforms you have available - in particular are there any 
> circumstances (compiler optimisation settings etc) where this implementation 
> breaks?
> 
> 2) Sign manipulation functions: implementations of the C99 and C++ TR1 
> functions copysign and signbit, plus the changesign function.  Two of these 
> (signbit and copysign) are currently undocumented members of Boost.Math, and 
> again the two implementations will get merged if this library is accepted.
> 
> Again the main focus of the review here is the implementation, and testing 
> thereof especially in the presence of compiler optimisations.
> 
> 3) C++ locale facets: these will read and write non-finite numbers in a 
> portable and round-trippable way: that is not otherwise possible with 
> current C++ std library implementations.  These are particularly useful for 
> number-serialisation for example.
> 
> Since the design is already specified by the C++ standard for these facets, 
> your review here should focus on implementation, testing, documentation, and 
> perhaps where in Boost these should best be placed if accepted.
> 
> These look to be a useful collection of utilities, so I'll look forward to 
> your reviews,
> 
> Regards,
> 
> John Maddock,
> 
> Floating Point Utilities Review Manager.