\section[Constants]{Info about this compilation}
\begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
module Constants (module Constants) where
+import Data.Bits (shiftL)
+
-- This magical #include brings in all the everybody-knows-these magic
-- constants unfortunately, we need to be *explicit* about which one
-- we want; if we just hope a -I... will get the right one, we could
All pretty arbitrary:
\begin{code}
-mAX_TUPLE_SIZE = (62 :: Int) -- Should really match the number
- -- of decls in Data.Tuple
+mAX_TUPLE_SIZE = (62 :: Int) -- Should really match the number
+ -- of decls in Data.Tuple
mAX_CONTEXT_REDUCTION_DEPTH = (20 :: Int)
\end{code}
rESERVED_STACK_WORDS = (RESERVED_STACK_WORDS :: Int)
\end{code}
+Continuations that need more than this amount of stack should do their
+own stack check (see bug #1466).
+
+\begin{code}
+aP_STACK_SPLIM = (AP_STACK_SPLIM :: Int)
+\end{code}
+
Size of a word, in bytes
\begin{code}
wORD_SIZE_IN_BITS = wORD_SIZE * 8 :: Int
\end{code}
+Amount of pointer bits used for semi-tagging constructor closures
+
+\begin{code}
+tAG_BITS = (TAG_BITS :: Int)
+tAG_MASK = ((1 `shiftL` tAG_BITS) - 1) :: Int
+mAX_PTR_TAG = tAG_MASK :: Int
+\end{code}
+
Size of a C int, in bytes. May be smaller than wORD_SIZE.
\begin{code}