-- Standard modules
import qualified Maybe
+import qualified Data.Either as Either
import qualified Data.List as List
import qualified Data.Map as Map
import qualified Control.Monad as Monad
import qualified Control.Arrow as Arrow
import qualified Data.Monoid as Monoid
import Data.Accessor
+import Debug.Trace
-- ForSyDe
import qualified ForSyDe.Backend.VHDL.AST as AST
-- This is a dataconstructor.
-- Not a datacon, just another signal. Perhaps we should check for
-- local/global here as well?
- Nothing -> AST.PrimName $ AST.NSimple $ varToVHDLId var
+ -- Sadly so.. tfp decimals are types, not data constructors, but instances
+ -- should still be translated to integer literals. It is probebly not the
+ -- best solution to translate them here.
+ -- FIXME: Find a better solution for translating instances of tfp integers
+ Nothing ->
+ let
+ ty = Var.varType var
+ res = case Type.splitTyConApp_maybe ty of
+ Just (tycon, args) ->
+ case Name.getOccString (TyCon.tyConName tycon) of
+ "Dec" -> AST.PrimLit $ (show (eval_tfp_int ty))
+ otherwise -> AST.PrimName $ AST.NSimple $ varToVHDLId var
+ in
+ res
-- Turn a VHDLName into an AST expression
vhdlNameToVHDLExpr = AST.PrimName
altconToVHDLExpr :: CoreSyn.AltCon -> AST.Expr
altconToVHDLExpr (DataAlt dc) = dataconToVHDLExpr dc
-altconToVHDLExpr (LitAlt _) = error "VHDL.conToVHDLExpr Literals not support in case alternatives yet"
-altconToVHDLExpr DEFAULT = error "VHDL.conToVHDLExpr DEFAULT alternative should not occur here!"
+altconToVHDLExpr (LitAlt _) = error "\nVHDL.conToVHDLExpr: Literals not support in case alternatives yet"
+altconToVHDLExpr DEFAULT = error "\nVHDL.conToVHDLExpr: DEFAULT alternative should not occur here!"
-- Turn a datacon (without arguments!) into a VHDL expression.
dataconToVHDLExpr :: DataCon.DataCon -> AST.Expr
builtin_types =
Map.fromList [
("Bit", std_logicTM),
- ("Bool", booleanTM) -- TysWiredIn.boolTy
+ ("Bool", booleanTM), -- TysWiredIn.boolTy
+ ("Dec", integerTM)
]
-- Translate a Haskell type to a VHDL type, generating a new type if needed.
-vhdl_ty :: Type.Type -> VHDLSession AST.TypeMark
-vhdl_ty ty = do
+-- Returns an error value, using the given message, when no type could be
+-- created.
+vhdl_ty :: String -> Type.Type -> TypeSession AST.TypeMark
+vhdl_ty msg ty = do
+ tm_either <- vhdl_ty_either ty
+ case tm_either of
+ Right tm -> return tm
+ Left err -> error $ msg ++ "\n" ++ err
+
+-- Translate a Haskell type to a VHDL type, generating a new type if needed.
+-- Returns either an error message or the resulting type.
+vhdl_ty_either :: Type.Type -> TypeSession (Either String AST.TypeMark)
+vhdl_ty_either ty = do
typemap <- getA vsTypes
let builtin_ty = do -- See if this is a tycon and lookup its name
(tycon, args) <- Type.splitTyConApp_maybe ty
let existing_ty = (fmap fst) $ Map.lookup (OrdType ty) typemap
case Monoid.getFirst $ Monoid.mconcat (map Monoid.First [builtin_ty, existing_ty]) of
-- Found a type, return it
- Just t -> return t
+ Just t -> return (Right t)
-- No type yet, try to construct it
Nothing -> do
newty_maybe <- (construct_vhdl_ty ty)
case newty_maybe of
- Just (ty_id, ty_def) -> do
+ Right (ty_id, ty_def) -> do
-- TODO: Check name uniqueness
modA vsTypes (Map.insert (OrdType ty) (ty_id, ty_def))
- return ty_id
- Nothing -> error $ "Unsupported Haskell type: " ++ pprString ty
-
--- Construct a new VHDL type for the given Haskell type.
-construct_vhdl_ty :: Type.Type -> VHDLSession (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+ modA vsTypeDecls (\typedefs -> typedefs ++ [mktydecl (ty_id, ty_def)])
+ return (Right ty_id)
+ Left err -> return $ Left $
+ "VHDLTools.vhdl_ty: Unsupported Haskell type: " ++ pprString ty ++ "\n"
+ ++ err
+
+-- Construct a new VHDL type for the given Haskell type. Returns an error
+-- message or the resulting typemark and typedef.
+construct_vhdl_ty :: Type.Type -> TypeSession (Either String (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
construct_vhdl_ty ty = do
case Type.splitTyConApp_maybe ty of
Just (tycon, args) -> do
let name = Name.getOccString (TyCon.tyConName tycon)
case name of
- "TFVec" -> do
- res <- mk_vector_ty (tfvec_len ty) (tfvec_elem ty)
- return $ Just $ (Arrow.second Right) res
+ "TFVec" -> mk_vector_ty ty
-- "SizedWord" -> do
-- res <- mk_vector_ty (sized_word_len ty) ty
-- return $ Just $ (Arrow.second Left) res
- "RangedWord" -> do
- res <- mk_natural_ty 0 (ranged_word_bound ty)
- return $ Just $ (Arrow.second Right) res
+ "RangedWord" -> mk_natural_ty 0 (ranged_word_bound ty)
-- Create a custom type from this tycon
otherwise -> mk_tycon_ty tycon args
- Nothing -> return $ Nothing
+ Nothing -> return (Left $ "VHDLTools.construct_vhdl_ty: Cannot create type for non-tycon type: " ++ pprString ty ++ "\n")
-- | Create VHDL type for a custom tycon
-mk_tycon_ty :: TyCon.TyCon -> [Type.Type] -> VHDLSession (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+mk_tycon_ty :: TyCon.TyCon -> [Type.Type] -> TypeSession (Either String (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
mk_tycon_ty tycon args =
case TyCon.tyConDataCons tycon of
-- Not an algebraic type
- [] -> error $ "Only custom algebraic types are supported: " ++ pprString tycon
+ [] -> return (Left $ "VHDLTools.mk_tycon_ty: Only custom algebraic types are supported: " ++ pprString tycon ++ "\n")
[dc] -> do
let arg_tys = DataCon.dataConRepArgTys dc
-- TODO: CoreSubst docs say each Subs can be applied only once. Is this a
-- violation? Or does it only mean not to apply it again to the same
-- subject?
let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
- elem_tys <- mapM vhdl_ty real_arg_tys
- let elems = zipWith AST.ElementDec recordlabels elem_tys
- -- For a single construct datatype, build a record with one field for
- -- each argument.
- -- TODO: Add argument type ids to this, to ensure uniqueness
- -- TODO: Special handling for tuples?
- let ty_id = mkVHDLExtId $ nameToString (TyCon.tyConName tycon)
- let ty_def = AST.TDR $ AST.RecordTypeDef elems
- return $ Just (ty_id, Left ty_def)
- dcs -> error $ "Only single constructor datatypes supported: " ++ pprString tycon
+ elem_tys_either <- mapM vhdl_ty_either real_arg_tys
+ case Either.partitionEithers elem_tys_either of
+ -- No errors in element types
+ ([], elem_tys) -> do
+ let elems = zipWith AST.ElementDec recordlabels elem_tys
+ -- For a single construct datatype, build a record with one field for
+ -- each argument.
+ -- TODO: Add argument type ids to this, to ensure uniqueness
+ -- TODO: Special handling for tuples?
+ let elem_names = concat $ map prettyShow elem_tys
+ let ty_id = mkVHDLExtId $ nameToString (TyCon.tyConName tycon) ++ elem_names
+ let ty_def = AST.TDR $ AST.RecordTypeDef elems
+ return $ Right (ty_id, Left ty_def)
+ -- There were errors in element types
+ (errors, _) -> return $ Left $
+ "VHDLTools.mk_tycon_ty: Can not construct type for: " ++ pprString tycon ++ "\n because no type can be construced for some of the arguments.\n"
+ ++ (concat errors)
+ dcs -> return $ Left $ "VHDLTools.mk_tycon_ty: Only single constructor datatypes supported: " ++ pprString tycon ++ "\n"
where
-- Create a subst that instantiates all types passed to the tycon
-- TODO: I'm not 100% sure that this is the right way to do this. It seems
-- | Create a VHDL vector type
mk_vector_ty ::
- Int -- ^ The length of the vector
- -> Type.Type -- ^ The Haskell element type of the Vector
- -> VHDLSession (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
-
-mk_vector_ty len el_ty = do
- elem_types_map <- getA vsElemTypes
- el_ty_tm <- vhdl_ty el_ty
- let ty_id = mkVHDLExtId $ "vector-"++ (AST.fromVHDLId el_ty_tm) ++ "-0_to_" ++ (show len)
- let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len - 1))]
- let existing_elem_ty = (fmap fst) $ Map.lookup (OrdType el_ty) elem_types_map
- case existing_elem_ty of
- Just t -> do
- let ty_def = AST.SubtypeIn t (Just range)
- return (ty_id, ty_def)
- Nothing -> do
- let vec_id = mkVHDLExtId $ "vector_" ++ (AST.fromVHDLId el_ty_tm)
- let vec_def = AST.TDA $ AST.UnconsArrayDef [tfvec_indexTM] el_ty_tm
- modA vsElemTypes (Map.insert (OrdType el_ty) (vec_id, vec_def))
- --modA vsTypeFuns (Map.insert (OrdType el_ty) (genUnconsVectorFuns el_ty_tm vec_id))
- let ty_def = AST.SubtypeIn vec_id (Just range)
- return (ty_id, ty_def)
+ Type.Type -- ^ The Haskell type of the Vector
+ -> TypeSession (Either String (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+ -- ^ An error message or The typemark created.
+
+mk_vector_ty ty = do
+ types_map <- getA vsTypes
+ let (nvec_l, nvec_el) = Type.splitAppTy ty
+ let (nvec, leng) = Type.splitAppTy nvec_l
+ let vec_ty = Type.mkAppTy nvec nvec_el
+ let len = tfvec_len ty
+ let el_ty = tfvec_elem ty
+ el_ty_tm_either <- vhdl_ty_either el_ty
+ case el_ty_tm_either of
+ -- Could create element type
+ Right el_ty_tm -> do
+ let ty_id = mkVHDLExtId $ "vector-"++ (AST.fromVHDLId el_ty_tm) ++ "-0_to_" ++ (show len)
+ let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len - 1))]
+ let existing_elem_ty = (fmap fst) $ Map.lookup (OrdType vec_ty) types_map
+ case existing_elem_ty of
+ Just t -> do
+ let ty_def = AST.SubtypeIn t (Just range)
+ return (Right (ty_id, Right ty_def))
+ Nothing -> do
+ let vec_id = mkVHDLExtId $ "vector_" ++ (AST.fromVHDLId el_ty_tm)
+ let vec_def = AST.TDA $ AST.UnconsArrayDef [tfvec_indexTM] el_ty_tm
+ modA vsTypes (Map.insert (OrdType vec_ty) (vec_id, (Left vec_def)))
+ modA vsTypeDecls (\typedefs -> typedefs ++ [mktydecl (vec_id, (Left vec_def))])
+ let ty_def = AST.SubtypeIn vec_id (Just range)
+ return (Right (ty_id, Right ty_def))
+ -- Could not create element type
+ Left err -> return $ Left $
+ "VHDLTools.mk_vector_ty: Can not construct vectortype for elementtype: " ++ pprString el_ty ++ "\n"
+ ++ err
mk_natural_ty ::
Int -- ^ The minimum bound (> 0)
-> Int -- ^ The maximum bound (> minimum bound)
- -> VHDLSession (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
+ -> TypeSession (Either String (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+ -- ^ An error message or The typemark created.
mk_natural_ty min_bound max_bound = do
let ty_id = mkVHDLExtId $ "nat_" ++ (show min_bound) ++ "_to_" ++ (show max_bound)
let range = AST.ConstraintRange $ AST.SubTypeRange (AST.PrimLit $ (show min_bound)) (AST.PrimLit $ (show max_bound))
let ty_def = AST.SubtypeIn naturalTM (Just range)
- return (ty_id, ty_def)
+ return (Right (ty_id, Right ty_def))
-- Finds the field labels for VHDL type generated for the given Core type,
-- which must result in a record type.
-getFieldLabels :: Type.Type -> VHDLSession [AST.VHDLId]
+getFieldLabels :: Type.Type -> TypeSession [AST.VHDLId]
getFieldLabels ty = do
-- Ensure that the type is generated (but throw away it's VHDLId)
- vhdl_ty ty
+ let error_msg = "\nVHDLTools.getFieldLabels: Can not get field labels, because: " ++ pprString ty ++ "can not be generated."
+ vhdl_ty error_msg ty
-- Get the types map, lookup and unpack the VHDL TypeDef
types <- getA vsTypes
case Map.lookup (OrdType ty) types of
Just (_, Left (AST.TDR (AST.RecordTypeDef elems))) -> return $ map (\(AST.ElementDec id _) -> id) elems
- _ -> error $ "VHDL.getFieldLabels Type not found or not a record type? This should not happen! Type: " ++ (show ty)
+ _ -> error $ "\nVHDL.getFieldLabels: Type not found or not a record type? This should not happen! Type: " ++ (show ty)
+
+mktydecl :: (AST.VHDLId, Either AST.TypeDef AST.SubtypeIn) -> AST.PackageDecItem
+mktydecl (ty_id, Left ty_def) = AST.PDITD $ AST.TypeDec ty_id ty_def
+mktydecl (ty_id, Right ty_def) = AST.PDISD $ AST.SubtypeDec ty_id ty_def
projects / matthijs / master-project / cλash.git / blobdiff