#8780: abs for IEEE floating point is slightly wrong. -------------------------------------+------------------------------------- Reporter: augustss | Owner: Type: bug | Status: infoneeded Priority: low | Milestone: Component: Compiler | Version: 7.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by augustss): It seems the printing of -0 has changed. Here's my session {{{ $ ghci GHCi, version 7.8.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Prelude> let x = -0 Prelude> x 0 Prelude> isNegativeZero x True Prelude> isNegativeZero (abs x) True Prelude> isNegativeZero (signum x) False }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8780#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler