\section[Constants]{Info about this compilation}
\begin{code}
+{-# OPTIONS_GHC -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/WorkingConventions#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
A section of code-generator-related MAGIC CONSTANTS.
\begin{code}
-mAX_FAMILY_SIZE_FOR_VEC_RETURNS = (MAX_VECTORED_RTN::Int) -- pretty arbitrary
--- If you change this, you may need to change runtimes/standard/Update.lhc
-\end{code}
-
-\begin{code}
mAX_Vanilla_REG = (MAX_VANILLA_REG :: Int)
mAX_Float_REG = (MAX_FLOAT_REG :: Int)
mAX_Double_REG = (MAX_DOUBLE_REG :: Int)
gRAN_HDR_SIZE = (GRAN_HDR_SIZE :: Int)
\end{code}
-Info Table sizes.
-
-\begin{code}
-sTD_ITBL_SIZE = (STD_ITBL_SIZE :: Int)
-rET_ITBL_SIZE = (RET_ITBL_SIZE :: Int)
-pROF_ITBL_SIZE = (PROF_ITBL_SIZE :: Int)
-gRAN_ITBL_SIZE = (GRAN_ITBL_SIZE :: Int)
-tICKY_ITBL_SIZE = (TICKY_ITBL_SIZE :: Int)
-\end{code}
-
Size of a double in StgWords.
\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}