[GHC] #9564: Floating point subnormals overrounded on output

[GHC]

#9564: Floating point subnormals overrounded on output
-------------------------------------+-------------------------------------
              Reporter:  jrp         |            Owner:  simonmar
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Runtime     |          Version:  7.8.3
  System                             |         Keywords:
            Resolution:              |     Architecture:  x86_64 (amd64)
      Operating System:  MacOS X     |       Difficulty:  Unknown
       Type of failure:  Incorrect   |       Blocked By:
  result at runtime                  |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by jrp):

 Are we not at risk of overcomplicating this?

 raskell (hugs, I think) shows
 {{{
 2**(-149)
 1.40129846432483e-45


 2**(-149)::Float
 1.401298e-45
 }}}

 which is more what I would expect.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9564#comment:4>
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