Re: [Boost-bugs] [Boost C++ Libraries] #11999: int128_t from cpp_int gives unexpected results when bitshifting

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11999: int128_t from cpp_int gives unexpected results when bitshifting
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-02-19 19:32:27

#11999: int128_t from cpp_int gives unexpected results when bitshifting
------------------------------------------------+--------------------------
  Reporter:  Jordi Vermeulen <J.L.Vermeulen@…>  |      Owner:  johnmaddock
      Type:  Bugs                               |     Status:  closed
 Milestone:  To Be Determined                   |  Component:
   Version:  Boost 1.60.0                       |  multiprecision
Resolution:  fixed                              |   Severity:  Problem
                                                |   Keywords:
------------------------------------------------+--------------------------
Changes (by johnmaddock):

 * status:  new => closed
 * resolution:   => fixed

Comment:

 Fixed in
 https://github.com/boostorg/multiprecision/commit/2f635b45ffc0517a67e8210239a587a29b62575a


 Note however that bit-shifting a signed integer invokes undefined
 behaviour, so the std::int64_t behaviour above is at the whim of the
 specific machine/compiler.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11999#comment:1>
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