Re: Fix prelude definitions of abs/signum for Floats/Doubles

I believe enough discussions took place on this topic, and we all seem to be in agreement that the behavior should be fixed. Encouraged by Simon's earlier note, here's the ticket I filed: http://hackage.haskell.org/trac/ghc/ticket/7858 Thanks to everyone for taking the time and contributing! -Levent. On Mon, Apr 22, 2013 at 4:25 AM, Simon Peyton-Jones wrote:

| > wrote: | > > Also | > > | > > abs x | > > | > > | x < 0 = negate x | > > | otherwise = x | > > | > > keeps the number of tests at one. | > | > This gives the wrong result for -0.0 (which is compare-equal to +0.0). | > | > Shachaf

I'm very happy to see all this activity on making GHC's numerics better. For this particular thread, would someone like to create a ticket?

My list of numeric infelicities is under "Better numerics" on http://hackage.haskell.org/trac/ghc/wiki/Status/SLPJ-Tickets

If any of you feel able to make progress on these things, it'd be great.

Simon

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