[GHC] #9304: Floating point woes; Different behavior on Mac vs Linux

[GHC]

#9304: Floating point woes; Different behavior on Mac vs Linux
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        Reporter:  lerkok            |            Owner:
            Type:  bug               |           Status:  new
        Priority:  high              |        Milestone:
       Component:  Compiler          |          Version:  7.8.3
      Resolution:                    |         Keywords:  floating point
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:  9276
        Blocking:                    |  Related Tickets:
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Comment (by lerkok):

 @carter: Good point; I haven't considered the implications of encoding of
 the input literals. Nonetheless, the experiment you suggested prints
 precisely the same results:

 {{{
 [ubuntu-VirtualBox]~/precision>ghc main.hs -o main -msse2 -fforce-recomp ;
 ./main ; ghc main.hs -o main -fexcess-precision -fforce-recomp; ./main
 [1 of 1] Compiling Main             ( main.hs, main.o )
 Linking main ...
 (-6192449487634422,-49)
 [1 of 1] Compiling Main             ( main.hs, main.o )
 Linking main ...
 (-6192449487634422,-49)
 }}}

 which still differ from the behavior on 64-bit platforms. So, I'm still
 inclined to think something is off here.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9304#comment:11>
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