[GHC] #2271: floor, ceiling, round :: Double -> Int are awesomely slow

[GHC]

#2271: floor, ceiling, round :: Double -> Int are awesomely slow
------------------------------------------+---------------------------------
    Reporter:  dons                       |        Owner:  daniel.is.fischer
        Type:  bug                        |       Status:  infoneeded       
    Priority:  low                        |    Milestone:  7.0.1            
   Component:  libraries/base             |      Version:  7.1              
    Keywords:  performance, math, double  |     Testcase:                   
   Blockedby:                             |   Difficulty:  Unknown          
          Os:  Unknown/Multiple           |     Blocking:                   
Architecture:  Unknown/Multiple           |      Failure:  None/Unknown     
------------------------------------------+---------------------------------
Changes (by michalt):

 * cc: michal.terepeta@… (added)


Comment:

 The patch has a simple mistake in type signatures that makes GHC fail to
 build
 on x86_64. It's enough to change
 {{{
 uncheckedIShiftRA64# :: Int# -> Int#

 uncheckedIShiftL64# :: Int# -> Int#
 }}}
 to
 {{{
 uncheckedIShiftRA64# :: Int# -> Int# -> Int#

 uncheckedIShiftL64# :: Int# -> Int# -> Int#
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2271#comment:20>
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