[GHC] #8780: abs for IEEE floating point is slightly wrong.

[GHC]

#8780: abs for IEEE floating point is slightly wrong.
-------------------------------------+-------------------------------------
        Reporter:  augustss          |                   Owner:
            Type:  bug               |                  Status:  closed
        Priority:  low               |               Milestone:
       Component:  Compiler          |                 Version:  7.6.3
      Resolution:  duplicate         |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #7858             |  Differential Revisions:
-------------------------------------+-------------------------------------

Comment (by rwbarton):

 Replying to [comment:2 augustss]:
 > It seems the printing of -0 has changed.  Here's my session
 >
 > {{{
 > $ ghci
 > GHCi, version 7.8.3: http://www.haskell.org/ghc/  :? for help
 > Loading package ghc-prim ... linking ... done.
 > Loading package integer-gmp ... linking ... done.
 > Loading package base ... linking ... done.
 > Prelude> let x = -0
 > Prelude> x
 > 0
 > }}}

 This part is just because `x` defaulted to Integer on this line; `-0.0` is
 still printed as `-0.0`. (7.8.3 has the MR disabled in ghci by default.)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8780#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler