fastBool False = 0#
isFastTrue x = x ==# 1#
+-- note that fastOr and fastAnd are strict in both arguments
+-- since they are unboxed
fastOr 1# _ = 1#
fastOr 0# x = x
type FastBool = Bool
fastBool x = x
-_IS_TRUE_ x = x
+isFastTrue x = x
+-- make sure these are as strict as the unboxed version,
+-- so that the performance characteristics match
+fastOr False False = False
+fastOr _ _ = True
+fastAnd True True = True
+fastAnd _ _ = False
+
+--These are among the type-signatures necessary for !ghc to compile
+-- but break ghc (can't give a signature for an import...)
+--Note that the comparisons actually do return Bools not FastBools.
+(+#) :: FastInt -> FastInt -> FastInt
+(-#) :: FastInt -> FastInt -> FastInt
+(*#) :: FastInt -> FastInt -> FastInt
+(==#) :: FastInt -> FastInt -> Bool
+(<#) :: FastInt -> FastInt -> Bool
+(<=#) :: FastInt -> FastInt -> Bool
+(>=#) :: FastInt -> FastInt -> Bool
+(>#) :: FastInt -> FastInt -> Bool
#endif /* ! __GLASGOW_HASKELL__ */
+
+-- type-signatures will improve the non-ghc-specific versions
+-- and keep things accurate (and ABLE to compile!)
+_ILIT :: Int -> FastInt
+iBox :: FastInt -> Int
+iUnbox :: Int -> FastInt
+
+quotFastInt :: FastInt -> FastInt -> FastInt
+negateFastInt :: FastInt -> FastInt
+
+fastBool :: Bool -> FastBool
+isFastTrue :: FastBool -> Bool
+fastOr :: FastBool -> FastBool -> FastBool
+fastAnd :: FastBool -> FastBool -> FastBool
+
\end{code}