[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 carter):

 I ran it on a 64 bit linux server i have using ghci
 {{{
 Prelude> :set -XScopedTypeVariables
 Prelude> let x :: Double = -4.4
 Prelude> let y :: Double = 2.4999999999999956
 Prelude> decodeFloat (x*y)
 (-6192449487634421,-49)

 }}}

 so if anything, it looks like its 32bit vs 64bit

 could you try running the above snippet in GHCi on your  32bit machine?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9304#comment:4>
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