[Boost-bugs] [Boost C++ Libraries] #12227: cpp_bin_float: sqrt(+inf) inconsistent with IEEE-754

Subject: [Boost-bugs] [Boost C++ Libraries] #12227: cpp_bin_float: sqrt(+inf) inconsistent with IEEE-754
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-05-24 20:18:22

#12227: cpp_bin_float: sqrt(+inf) inconsistent with IEEE-754
------------------------------+----------------------------
 Reporter:  Michael Shatz     |      Owner:  johnmaddock
     Type:  Feature Requests  |     Status:  new
Milestone:  To Be Determined  |  Component:  multiprecision
  Version:  Boost 1.61.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+----------------------------
 cpp_bin_float sqrt(+inf) returns NaN.
 IEEE-754 appears to recommend +inf which is also the most logical result.
 The requirement is not very clear from the wording of Standard, but asked
 a member of committee and he has no doubt that it was an intention.

 It's not a bug, because cpp_bin_float was never advertised as fully
 compliant with IEEE-754, but I see no reason why it can't be as close as
 possible to IEEE binary floating point. Especially in cases like that
 where consistency with IEEE is almost free in terms of performance.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/12227>
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