-- for a few builtin types.
builtin_types =
Map.fromList [
- ("Bit", std_logicTM),
- ("Bool", booleanTM), -- TysWiredIn.boolTy
- ("Dec", integerTM)
+ ("Bit", Just std_logicTM),
+ ("Bool", Just booleanTM), -- TysWiredIn.boolTy
+ ("Dec", Just integerTM)
]
-- Translate a Haskell type to a VHDL type, generating a new type if needed.
-- Returns an error value, using the given message, when no type could be
--- created.
-vhdl_ty :: String -> Type.Type -> TypeSession AST.TypeMark
+-- created. Returns Nothing when the type is valid, but empty.
+vhdl_ty :: String -> Type.Type -> TypeSession (Maybe AST.TypeMark)
vhdl_ty msg ty = do
tm_either <- vhdl_ty_either ty
case tm_either of
-- 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 :: Type.Type -> TypeSession (Either String (Maybe AST.TypeMark))
vhdl_ty_either ty = do
typemap <- getA tsTypes
htype_either <- mkHType ty
let name = Name.getOccString (TyCon.tyConName tycon)
Map.lookup name builtin_types
-- If not a builtin type, try the custom types
- let existing_ty = (fmap fst) $ Map.lookup htype typemap
+ let existing_ty = (Monad.liftM $ fmap fst) $ Map.lookup htype typemap
case Monoid.getFirst $ Monoid.mconcat (map Monoid.First [builtin_ty, existing_ty]) of
-- Found a type, return it
Just t -> return (Right t)
-- No type yet, try to construct it
Nothing -> do
- newty_maybe <- (construct_vhdl_ty ty)
- case newty_maybe of
- Right (ty_id, ty_def) -> do
+ newty_either <- (construct_vhdl_ty ty)
+ case newty_either of
+ Right newty -> do
-- TODO: Check name uniqueness
- modA tsTypes (Map.insert htype (ty_id, ty_def))
- modA tsTypeDecls (\typedefs -> typedefs ++ [mktydecl (ty_id, ty_def)])
- return (Right ty_id)
+ modA tsTypes (Map.insert htype newty)
+ case newty of
+ Just (ty_id, ty_def) -> do
+ modA tsTypeDecls (\typedefs -> typedefs ++ [mktydecl (ty_id, ty_def)])
+ return (Right $ Just ty_id)
+ Nothing -> return $ Right Nothing
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 :: Type.Type -> TypeSession (Either String (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn)))
construct_vhdl_ty ty = do
case Type.splitTyConApp_maybe ty of
Just (tycon, args) -> do
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 :: Type.Type -> TyCon.TyCon -> [Type.Type] -> TypeSession (Either String (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+mk_tycon_ty :: Type.Type -> TyCon.TyCon -> [Type.Type] -> TypeSession (Either String (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn)))
mk_tycon_ty ty tycon args =
case TyCon.tyConDataCons tycon of
-- Not an algebraic type
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
- let tupshow = mkTupleShow elem_tys ty_id
- modA tsTypeFuns $ Map.insert (OrdType ty, showIdString) (showId, tupshow)
- return $ Right (ty_id, Left ty_def)
+ ([], elem_tys') -> do
+ -- Throw away all empty members
+ case Maybe.catMaybes elem_tys' of
+ [] -> -- No non-empty members
+ return $ Right Nothing
+ 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
+ let tupshow = mkTupleShow elem_tys ty_id
+ modA tsTypeFuns $ Map.insert (OrdType ty, showIdString) (showId, tupshow)
+ return $ Right $ Just (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"
-- | Create a VHDL vector type
mk_vector_ty ::
Type.Type -- ^ The Haskell type of the Vector
- -> TypeSession (Either String (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+ -> TypeSession (Either String (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn)))
-- ^ An error message or The typemark created.
mk_vector_ty ty = do
el_ty_tm_either <- vhdl_ty_either el_ty
case el_ty_tm_either of
-- Could create element type
- Right el_ty_tm -> do
+ Right (Just 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 (StdType $ OrdType vec_ty) types_map
+ let existing_elem_ty = (fmap $ fmap fst) $ Map.lookup (StdType $ OrdType vec_ty) types_map
case existing_elem_ty of
- Just t -> do
+ Just (Just t) -> do
let ty_def = AST.SubtypeIn t (Just range)
- return (Right (ty_id, Right ty_def))
+ return (Right $ Just (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 tsTypes (Map.insert (StdType $ OrdType vec_ty) (vec_id, (Left vec_def)))
+ modA tsTypes (Map.insert (StdType $ OrdType vec_ty) (Just (vec_id, (Left vec_def))))
modA tsTypeDecls (\typedefs -> typedefs ++ [mktydecl (vec_id, (Left vec_def))])
let vecShowFuns = mkVectorShow el_ty_tm vec_id
mapM_ (\(id, subprog) -> modA tsTypeFuns $ Map.insert (OrdType vec_ty, id) ((mkVHDLExtId id), subprog)) vecShowFuns
let ty_def = AST.SubtypeIn vec_id (Just range)
- return (Right (ty_id, Right ty_def))
+ return (Right $ Just (ty_id, Right ty_def))
+ -- Empty element type? Empty vector type then. TODO: Does this make sense?
+ -- Probably needs changes in the builtin functions as well...
+ Right Nothing -> return $ Right Nothing
-- Could not create element type
Left err -> return $ Left $
"VHDLTools.mk_vector_ty: Can not construct vectortype for elementtype: " ++ pprString el_ty ++ "\n"
mk_natural_ty ::
Int -- ^ The minimum bound (> 0)
-> Int -- ^ The maximum bound (> minimum bound)
- -> TypeSession (Either String (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+ -> TypeSession (Either String (Maybe (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 (Right (ty_id, Right ty_def))
+ return (Right $ Just (ty_id, Right ty_def))
mk_unsigned_ty ::
Type.Type -- ^ Haskell type of the unsigned integer
- -> TypeSession (Either String (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+ -> TypeSession (Either String (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn)))
mk_unsigned_ty ty = do
size <- tfp_to_int (sized_word_len_ty ty)
let ty_id = mkVHDLExtId $ "unsigned_" ++ show (size - 1)
let ty_def = AST.SubtypeIn unsignedTM (Just range)
let unsignedshow = mkIntegerShow ty_id
modA tsTypeFuns $ Map.insert (OrdType ty, showIdString) (showId, unsignedshow)
- return (Right (ty_id, Right ty_def))
+ return (Right $ Just (ty_id, Right ty_def))
mk_signed_ty ::
Type.Type -- ^ Haskell type of the signed integer
- -> TypeSession (Either String (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+ -> TypeSession (Either String (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn)))
mk_signed_ty ty = do
size <- tfp_to_int (sized_int_len_ty ty)
let ty_id = mkVHDLExtId $ "signed_" ++ show (size - 1)
let ty_def = AST.SubtypeIn signedTM (Just range)
let signedshow = mkIntegerShow ty_id
modA tsTypeFuns $ Map.insert (OrdType ty, showIdString) (showId, signedshow)
- return (Right (ty_id, Right ty_def))
+ return (Right $ Just (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.
-- Assume the type for which we want labels is really translatable
Right htype <- mkHType ty
case Map.lookup htype types of
- Just (_, Left (AST.TDR (AST.RecordTypeDef elems))) -> return $ map (\(AST.ElementDec id _) -> id) elems
+ Just (Just (_, Left (AST.TDR (AST.RecordTypeDef elems)))) -> return $ map (\(AST.ElementDec id _) -> id) elems
+ Just Nothing -> return [] -- The type is empty
_ -> 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
map (\exp -> Nothing AST.:=>: AST.ADExpr exp) [arg1,arg2]
mkSigDec :: CoreSyn.CoreBndr -> TranslatorSession (Maybe AST.SigDec)
-mkSigDec bndr =
- if True then do --isInternalSigUse use || isStateSigUse use then do
- let error_msg = "\nVHDL.mkSigDec: Can not make signal declaration for type: \n" ++ pprString bndr
- type_mark <- MonadState.lift tsType $ vhdl_ty error_msg (Var.varType bndr)
- return $ Just (AST.SigDec (varToVHDLId bndr) type_mark Nothing)
- else
- return Nothing
+mkSigDec bndr = do
+ let error_msg = "\nVHDL.mkSigDec: Can not make signal declaration for type: \n" ++ pprString bndr
+ type_mark_maybe <- MonadState.lift tsType $ vhdl_ty error_msg (Var.varType bndr)
+ case type_mark_maybe of
+ Just type_mark -> return $ Just (AST.SigDec (varToVHDLId bndr) type_mark Nothing)
+ Nothing -> return Nothing
projects / matthijs / master-project / cλash.git / blobdiff