1 {-# LANGUAGE RelaxedPolyRec #-} -- Needed for vhdl_ty_either', for some reason...
2 module CLasH.VHDL.VHDLTools where
6 import qualified Data.Either as Either
7 import qualified Data.List as List
8 import qualified Data.Char as Char
9 import qualified Data.Map as Map
10 import qualified Control.Monad as Monad
11 import qualified Data.Accessor.Monad.Trans.State as MonadState
14 import qualified Language.VHDL.AST as AST
17 import qualified CoreSyn
19 import qualified OccName
22 import qualified TyCon
24 import qualified DataCon
25 import qualified CoreSubst
26 import qualified Outputable
29 import CLasH.VHDL.VHDLTypes
30 import CLasH.Translator.TranslatorTypes
31 import CLasH.Utils.Core.CoreTools
33 import CLasH.Utils.Pretty
34 import CLasH.VHDL.Constants
36 -----------------------------------------------------------------------------
37 -- Functions to generate concurrent statements
38 -----------------------------------------------------------------------------
40 -- Create an unconditional assignment statement
42 Either CoreSyn.CoreBndr AST.VHDLName -- ^ The signal to assign to
43 -> AST.Expr -- ^ The expression to assign
44 -> AST.ConcSm -- ^ The resulting concurrent statement
45 mkUncondAssign dst expr = mkAssign dst Nothing expr
47 -- Create a conditional assignment statement
49 Either CoreSyn.CoreBndr AST.VHDLName -- ^ The signal to assign to
50 -> AST.Expr -- ^ The condition
51 -> AST.Expr -- ^ The value when true
52 -> AST.Expr -- ^ The value when false
53 -> AST.ConcSm -- ^ The resulting concurrent statement
54 mkCondAssign dst cond true false = mkAssign dst (Just (cond, true)) false
56 -- Create a conditional or unconditional assignment statement
58 Either CoreSyn.CoreBndr AST.VHDLName -- ^ The signal to assign to
59 -> Maybe (AST.Expr , AST.Expr) -- ^ Optionally, the condition to test for
60 -- and the value to assign when true.
61 -> AST.Expr -- ^ The value to assign when false or no condition
62 -> AST.ConcSm -- ^ The resulting concurrent statement
63 mkAssign dst cond false_expr =
65 -- I'm not 100% how this assignment AST works, but this gets us what we
67 whenelse = case cond of
68 Just (cond_expr, true_expr) ->
70 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
72 [AST.WhenElse true_wform cond_expr]
74 false_wform = AST.Wform [AST.WformElem false_expr Nothing]
75 dst_name = case dst of
76 Left bndr -> AST.NSimple (varToVHDLId bndr)
78 assign = dst_name AST.:<==: (AST.ConWforms whenelse false_wform Nothing)
83 Either CoreSyn.CoreBndr AST.VHDLName -- ^ The signal to assign to
84 -> [AST.Expr] -- ^ The conditions
85 -> [AST.Expr] -- ^ The expressions
86 -> AST.ConcSm -- ^ The Alt assigns
87 mkAltsAssign dst conds exprs
88 | (length conds) /= ((length exprs) - 1) = error "\nVHDLTools.mkAltsAssign: conditions expression mismatch"
91 whenelses = zipWith mkWhenElse conds exprs
92 false_wform = AST.Wform [AST.WformElem (last exprs) Nothing]
93 dst_name = case dst of
94 Left bndr -> AST.NSimple (varToVHDLId bndr)
96 assign = dst_name AST.:<==: (AST.ConWforms whenelses false_wform Nothing)
100 mkWhenElse :: AST.Expr -> AST.Expr -> AST.WhenElse
101 mkWhenElse cond true_expr =
103 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
105 AST.WhenElse true_wform cond
108 [AST.Expr] -- ^ The argument that are applied to function
109 -> AST.VHDLName -- ^ The binder in which to store the result
110 -> Entity -- ^ The entity to map against.
111 -> [AST.AssocElem] -- ^ The resulting port maps
112 mkAssocElems args res entity =
113 arg_maps ++ (Maybe.maybeToList res_map_maybe)
115 arg_ports = ent_args entity
116 res_port_maybe = ent_res entity
117 -- Create an expression of res to map against the output port
118 res_expr = vhdlNameToVHDLExpr res
119 -- Map each of the input ports
120 arg_maps = zipWith mkAssocElem (map fst arg_ports) args
121 -- Map the output port, if present
122 res_map_maybe = fmap (\port -> mkAssocElem (fst port) res_expr) res_port_maybe
124 -- | Create an VHDL port -> signal association
125 mkAssocElem :: AST.VHDLId -> AST.Expr -> AST.AssocElem
126 mkAssocElem port signal = Just port AST.:=>: (AST.ADExpr signal)
128 -- | Create an aggregate signal
129 mkAggregateSignal :: [AST.Expr] -> AST.Expr
130 mkAggregateSignal x = AST.Aggregate (map (\z -> AST.ElemAssoc Nothing z) x)
133 String -- ^ The portmap label
134 -> AST.VHDLId -- ^ The entity name
135 -> [AST.AssocElem] -- ^ The port assignments
137 mkComponentInst label entity_id portassigns = AST.CSISm compins
139 -- We always have a clock port, so no need to map it anywhere but here
140 clk_port = mkAssocElem clockId (idToVHDLExpr clockId)
141 resetn_port = mkAssocElem resetId (idToVHDLExpr resetId)
142 compins = AST.CompInsSm (mkVHDLExtId label) (AST.IUEntity (AST.NSimple entity_id)) (AST.PMapAspect (portassigns ++ [clk_port,resetn_port]))
144 -----------------------------------------------------------------------------
145 -- Functions to generate VHDL Exprs
146 -----------------------------------------------------------------------------
148 varToVHDLExpr :: Var.Var -> TypeSession AST.Expr
150 case Id.isDataConWorkId_maybe var of
151 -- This is a dataconstructor.
152 Just dc -> dataconToVHDLExpr dc
153 -- Not a datacon, just another signal.
154 Nothing -> return $ AST.PrimName $ AST.NSimple $ varToVHDLId var
156 -- Turn a VHDLName into an AST expression
157 vhdlNameToVHDLExpr = AST.PrimName
159 -- Turn a VHDL Id into an AST expression
160 idToVHDLExpr = vhdlNameToVHDLExpr . AST.NSimple
162 -- Turn a Core expression into an AST expression
163 exprToVHDLExpr core = varToVHDLExpr (exprToVar core)
165 -- Turn a String into a VHDL expr containing an id
166 stringToVHDLExpr :: String -> AST.Expr
167 stringToVHDLExpr = idToVHDLExpr . mkVHDLExtId
170 -- Turn a alternative constructor into an AST expression. For
171 -- dataconstructors, this is only the constructor itself, not any arguments it
172 -- has. Should not be called with a DEFAULT constructor.
173 altconToVHDLExpr :: CoreSyn.AltCon -> TypeSession AST.Expr
174 altconToVHDLExpr (CoreSyn.DataAlt dc) = dataconToVHDLExpr dc
176 altconToVHDLExpr (CoreSyn.LitAlt _) = error "\nVHDL.conToVHDLExpr: Literals not support in case alternatives yet"
177 altconToVHDLExpr CoreSyn.DEFAULT = error "\nVHDL.conToVHDLExpr: DEFAULT alternative should not occur here!"
179 -- Turn a datacon (without arguments!) into a VHDL expression.
180 dataconToVHDLExpr :: DataCon.DataCon -> TypeSession AST.Expr
181 dataconToVHDLExpr dc = do
182 typemap <- MonadState.get tsTypes
183 htype_either <- mkHTypeEither (DataCon.dataConRepType dc)
187 let dcname = DataCon.dataConName dc
189 (BuiltinType "Bit") -> return $ AST.PrimLit $ case Name.getOccString dcname of "High" -> "'1'"; "Low" -> "'0'"
190 (BuiltinType "Bool") -> return $ AST.PrimLit $ case Name.getOccString dcname of "True" -> "true"; "False" -> "false"
192 let existing_ty = Monad.liftM (fmap fst) $ Map.lookup htype typemap
195 let lit = idToVHDLExpr $ mkVHDLExtId $ Name.getOccString dcname
197 Nothing -> error $ "\nVHDLTools.dataconToVHDLExpr: Trying to make value for non-representable DataCon: " ++ pprString dc
198 -- Error when constructing htype
199 Left err -> error err
201 -----------------------------------------------------------------------------
202 -- Functions dealing with names, variables and ids
203 -----------------------------------------------------------------------------
205 -- Creates a VHDL Id from a binder
209 varToVHDLId var = mkVHDLExtId (varToString var ++ varToStringUniq var ++ show (lowers $ varToStringUniq var))
211 lowers :: String -> Int
212 lowers xs = length [x | x <- xs, Char.isLower x]
214 -- Creates a VHDL Name from a binder
218 varToVHDLName = AST.NSimple . varToVHDLId
220 -- Extracts the binder name as a String
224 varToString = OccName.occNameString . Name.nameOccName . Var.varName
226 -- Get the string version a Var's unique
227 varToStringUniq :: Var.Var -> String
228 varToStringUniq = show . Var.varUnique
230 -- Extracts the string version of the name
231 nameToString :: Name.Name -> String
232 nameToString = OccName.occNameString . Name.nameOccName
234 -- Shortcut for Basic VHDL Ids.
235 -- Can only contain alphanumerics and underscores. The supplied string must be
236 -- a valid basic id, otherwise an error value is returned. This function is
237 -- not meant to be passed identifiers from a source file, use mkVHDLExtId for
239 mkVHDLBasicId :: String -> AST.VHDLId
241 AST.unsafeVHDLBasicId $ (strip_multiscore . strip_leading . strip_invalid) s
243 -- Strip invalid characters.
244 strip_invalid = filter (`elem` ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ "_.")
245 -- Strip leading numbers and underscores
246 strip_leading = dropWhile (`elem` ['0'..'9'] ++ "_")
247 -- Strip multiple adjacent underscores
248 strip_multiscore = concatMap (\cs ->
254 -- Shortcut for Extended VHDL Id's. These Id's can contain a lot more
255 -- different characters than basic ids, but can never be used to refer to
257 -- Use extended Ids for any values that are taken from the source file.
258 mkVHDLExtId :: String -> AST.VHDLId
260 AST.unsafeVHDLExtId $ strip_invalid s
262 -- Allowed characters, taken from ForSyde's mkVHDLExtId
263 allowed = ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ " \"#&'()*+,./:;<=>_|!$%@?[]^`{}~-"
264 strip_invalid = filter (`elem` allowed)
266 -- Create a record field selector that selects the given label from the record
267 -- stored in the given binder.
268 mkSelectedName :: AST.VHDLName -> AST.VHDLId -> AST.VHDLName
269 mkSelectedName name label =
270 AST.NSelected $ name AST.:.: (AST.SSimple label)
272 -- Create an indexed name that selects a given element from a vector.
273 mkIndexedName :: AST.VHDLName -> AST.Expr -> AST.VHDLName
274 -- Special case for already indexed names. Just add an index
275 mkIndexedName (AST.NIndexed (AST.IndexedName name indexes)) index =
276 AST.NIndexed (AST.IndexedName name (indexes++[index]))
277 -- General case for other names
278 mkIndexedName name index = AST.NIndexed (AST.IndexedName name [index])
280 -----------------------------------------------------------------------------
281 -- Functions dealing with VHDL types
282 -----------------------------------------------------------------------------
283 builtin_types :: TypeMap
286 (BuiltinType "Bit", Just (std_logicTM, Nothing)),
287 (BuiltinType "Bool", Just (booleanTM, Nothing)) -- TysWiredIn.boolTy
290 -- Is the given type representable at runtime?
291 isReprType :: Type.Type -> TypeSession Bool
293 ty_either <- mkHTypeEither ty
294 return $ case ty_either of
298 -- | Turn a Core type into a HType, returning an error using the given
299 -- error string if the type was not representable.
300 mkHType :: (TypedThing t, Outputable.Outputable t) =>
301 String -> t -> TypeSession HType
303 htype_either <- mkHTypeEither ty
305 Right htype -> return htype
306 Left err -> error $ msg ++ err
308 -- | Turn a Core type into a HType. Returns either an error message if
309 -- the type was not representable, or the HType generated.
310 mkHTypeEither :: (TypedThing t, Outputable.Outputable t) =>
311 t -> TypeSession (Either String HType)
312 mkHTypeEither tything =
313 case getType tything of
314 Nothing -> return $ Left $ "\nVHDLTools.mkHTypeEither: Typed thing without a type: " ++ pprString tything
315 Just ty -> mkHTypeEither' ty
317 mkHTypeEither' :: Type.Type -> TypeSession (Either String HType)
318 mkHTypeEither' ty | ty_has_free_tyvars ty = return $ Left $ "\nVHDLTools.mkHTypeEither': Cannot create type: type has free type variables: " ++ pprString ty
319 | isStateType ty = return $ Right StateType
321 case Type.splitTyConApp_maybe ty of
322 Just (tycon, args) -> do
323 typemap <- MonadState.get tsTypes
324 let name = Name.getOccString (TyCon.tyConName tycon)
325 let builtinTyMaybe = Map.lookup (BuiltinType name) typemap
326 case builtinTyMaybe of
327 (Just x) -> return $ Right $ BuiltinType name
331 let el_ty = tfvec_elem ty
332 elem_htype_either <- mkHTypeEither el_ty
333 case elem_htype_either of
334 -- Could create element type
335 Right elem_htype -> do
336 len <- tfp_to_int (tfvec_len_ty ty)
337 return $ Right $ VecType len elem_htype
338 -- Could not create element type
339 Left err -> return $ Left $
340 "\nVHDLTools.mkHTypeEither': Can not construct vectortype for elementtype: " ++ pprString el_ty ++ err
342 len <- tfp_to_int (sized_word_len_ty ty)
343 return $ Right $ SizedWType len
345 len <- tfp_to_int (sized_word_len_ty ty)
346 return $ Right $ SizedIType len
348 bound <- tfp_to_int (ranged_word_bound_ty ty)
349 -- Upperbound is exclusive, hence the -1
350 return $ Right $ RangedWType (bound - 1)
352 mkTyConHType tycon args
353 Nothing -> return $ Left $ "\nVHDLTools.mkHTypeEither': Do not know what to do with type: " ++ pprString ty
355 mkTyConHType :: TyCon.TyCon -> [Type.Type] -> TypeSession (Either String HType)
356 mkTyConHType tycon args =
357 case TyCon.tyConDataCons tycon of
358 -- Not an algebraic type
359 [] -> return $ Left $ "VHDLTools.mkTyConHType: Only custom algebraic types are supported: " ++ pprString tycon
361 let arg_tyss = map DataCon.dataConRepArgTys dcs
362 let enum_ty = EnumType name (map (nameToString . DataCon.dataConName) dcs)
363 case (concat arg_tyss) of
364 -- No arguments, this is just an enumeration type
365 [] -> return (Right enum_ty)
366 -- At least one argument, this becomes an aggregate type
368 -- Resolve any type arguments to this type
369 let real_arg_tyss = map (map (CoreSubst.substTy subst)) arg_tyss
370 -- Remove any state type fields
371 let real_arg_tyss_nostate = map (filter (\x -> not (isStateType x))) real_arg_tyss
372 elem_htyss_either <- mapM (mapM mkHTypeEither) real_arg_tyss_nostate
373 let (errors, elem_htyss) = unzip (map Either.partitionEithers elem_htyss_either)
374 case (all null errors) of
375 True -> case (dcs, concat elem_htyss) of
376 -- A single constructor with a single (non-state) field?
377 ([dc], [elem_hty]) -> return $ Right elem_hty
378 -- If we get here, then all of the argument types were state
379 -- types (we check for enumeration types at the top). Not
380 -- sure how to handle this, so error out for now.
381 (_, []) -> error $ "ADT with only State elements (or something like that?) Dunno how to handle this yet. Tycon: " ++ pprString tycon ++ " Arguments: " ++ pprString args
382 -- A full ADT (with multiple fields and one or multiple
385 let (_, fieldss) = List.mapAccumL (List.mapAccumL label_field) labels elem_htyss
386 -- Only put in an enumeration as part of the aggregation
387 -- when there are multiple datacons
388 let enum_ty_part = case dcs of
390 _ -> Just ("constructor", enum_ty)
391 -- Create the AggrType HType
392 return $ Right $ AggrType name enum_ty_part fieldss
393 -- There were errors in element types
394 False -> return $ Left $
395 "\nVHDLTools.mkTyConHType: Can not construct type for: " ++ pprString tycon ++ "\n because no type can be construced for some of the arguments.\n"
396 ++ (concat $ concat errors)
398 name = (nameToString (TyCon.tyConName tycon))
399 tyvars = TyCon.tyConTyVars tycon
400 subst = CoreSubst.extendTvSubstList CoreSubst.emptySubst (zip tyvars args)
401 -- Label a field by taking the first available label and returning
403 label_field :: [String] -> HType -> ([String], (String, HType))
404 label_field (l:ls) htype = (ls, (l, htype))
405 labels = map (:[]) ['A'..'Z']
407 vhdlTy :: (TypedThing t, Outputable.Outputable t) =>
408 String -> t -> TypeSession (Maybe AST.TypeMark)
410 htype <- mkHType msg ty
413 -- | Translate a Haskell type to a VHDL type, generating a new type if needed.
414 -- Returns an error value, using the given message, when no type could be
415 -- created. Returns Nothing when the type is valid, but empty.
416 vhdlTyMaybe :: HType -> TypeSession (Maybe AST.TypeMark)
417 vhdlTyMaybe htype = do
418 typemap <- MonadState.get tsTypes
419 -- If not a builtin type, try the custom types
420 let existing_ty = Map.lookup htype typemap
422 -- Found a type, return it
423 Just (Just (t, _)) -> return $ Just t
424 Just (Nothing) -> return Nothing
425 -- No type yet, try to construct it
427 newty <- (construct_vhdl_ty htype)
428 MonadState.modify tsTypes (Map.insert htype newty)
430 Just (ty_id, ty_def) -> do
431 MonadState.modify tsTypeDecls (\typedefs -> typedefs ++ [mktydecl (ty_id, ty_def)])
433 Nothing -> return Nothing
435 -- Construct a new VHDL type for the given Haskell type. Returns an error
436 -- message or the resulting typemark and typedef.
437 construct_vhdl_ty :: HType -> TypeSession TypeMapRec
438 -- State types don't generate VHDL
439 construct_vhdl_ty htype =
441 StateType -> return Nothing
442 (SizedWType w) -> mkUnsignedTy w
443 (SizedIType i) -> mkSignedTy i
444 (RangedWType u) -> mkNaturalTy 0 u
445 (VecType n e) -> mkVectorTy (VecType n e)
446 -- Create a custom type from this tycon
447 otherwise -> mkTyconTy htype
449 -- | Create VHDL type for a custom tycon
450 mkTyconTy :: HType -> TypeSession TypeMapRec
453 (AggrType name enum_field_maybe fieldss) -> do
454 let (labelss, elem_htypess) = unzip (map unzip fieldss)
455 elemTyMaybess <- mapM (mapM vhdlTyMaybe) elem_htypess
456 let elem_tyss = map Maybe.catMaybes elemTyMaybess
457 case concat elem_tyss of
458 [] -> -- No non-empty fields
461 let reclabelss = map (map mkVHDLBasicId) labelss
462 let elemss = zipWith (zipWith AST.ElementDec) reclabelss elem_tyss
463 let elem_names = concatMap (concatMap prettyShow) elem_tyss
464 let ty_id = mkVHDLExtId $ name ++ elem_names
465 -- Find out if we need to add an extra field at the start of
466 -- the record type containing the constructor (only needed
467 -- when there's more than one constructor).
468 enum_ty_maybe <- case enum_field_maybe of
469 Nothing -> return Nothing
470 Just (_, enum_htype) -> do
471 enum_ty_maybe' <- vhdlTyMaybe enum_htype
472 case enum_ty_maybe' of
473 Nothing -> error $ "Couldn't translate enumeration type part of AggrType: " ++ show htype
474 -- Note that the first Just means the type is
475 -- translateable, while the second Just means that there
476 -- is a enum_ty at all (e.g., there's multiple
478 Just enum_ty -> return $ Just enum_ty
479 -- Create an record field declaration for the first
480 -- constructor field, if needed.
481 enum_dec_maybe <- case enum_field_maybe of
482 Nothing -> return $ Nothing
483 Just (enum_name, enum_htype) -> do
484 enum_vhdl_ty_maybe <- vhdlTyMaybe enum_htype
485 let enum_vhdl_ty = Maybe.fromMaybe (error $ "\nVHDLTools.mkTyconTy: Enumeration field should not have empty type: " ++ show enum_htype) enum_vhdl_ty_maybe
486 return $ Just $ AST.ElementDec (mkVHDLBasicId enum_name) enum_vhdl_ty
487 -- Turn the maybe into a list, so we can prepend it.
488 let enum_decs = Maybe.maybeToList enum_dec_maybe
489 let enum_tys = Maybe.maybeToList enum_ty_maybe
490 let ty_def = AST.TDR $ AST.RecordTypeDef (enum_decs ++ concat elemss)
491 let tupshow = mkTupleShow (enum_tys ++ concat elem_tyss) ty_id
492 MonadState.modify tsTypeFuns $ Map.insert (htype, showIdString) (showId, tupshow)
493 return $ Just (ty_id, Just $ Left ty_def)
494 (EnumType tycon dcs) -> do
495 let elems = map mkVHDLExtId dcs
496 let ty_id = mkVHDLExtId tycon
497 let ty_def = AST.TDE $ AST.EnumTypeDef elems
498 let enumShow = mkEnumShow elems ty_id
499 MonadState.modify tsTypeFuns $ Map.insert (htype, showIdString) (showId, enumShow)
500 return $ Just (ty_id, Just $ Left ty_def)
501 otherwise -> error $ "\nVHDLTools.mkTyconTy: Called for HType that is neiter a AggrType or EnumType: " ++ show htype
503 -- | Create a VHDL vector type
505 HType -- ^ The Haskell type of the Vector
506 -> TypeSession TypeMapRec
507 -- ^ An error message or The typemark created.
509 mkVectorTy (VecType len elHType) = do
510 typesMap <- MonadState.get tsTypes
511 elTyTmMaybe <- vhdlTyMaybe elHType
514 let ty_id = mkVHDLExtId $ "vector-"++ (AST.fromVHDLId elTyTm) ++ "-0_to_" ++ (show len)
515 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len - 1))]
516 let existing_uvec_ty = fmap (fmap fst) $ Map.lookup (UVecType elHType) typesMap
517 case existing_uvec_ty of
519 let ty_def = AST.SubtypeIn t (Just range)
520 return (Just (ty_id, Just $ Right ty_def))
522 let vec_id = mkVHDLExtId $ "vector_" ++ (AST.fromVHDLId elTyTm)
523 let vec_def = AST.TDA $ AST.UnconsArrayDef [tfvec_indexTM] elTyTm
524 MonadState.modify tsTypes (Map.insert (UVecType elHType) (Just (vec_id, (Just $ Left vec_def))))
525 MonadState.modify tsTypeDecls (\typedefs -> typedefs ++ [mktydecl (vec_id, (Just $ Left vec_def))])
526 let vecShowFuns = mkVectorShow elTyTm vec_id
527 mapM_ (\(id, subprog) -> MonadState.modify tsTypeFuns $ Map.insert (UVecType elHType, id) ((mkVHDLExtId id), subprog)) vecShowFuns
528 let ty_def = AST.SubtypeIn vec_id (Just range)
529 return (Just (ty_id, Just $ Right ty_def))
530 -- Vector of empty elements becomes empty itself.
531 Nothing -> return Nothing
532 mkVectorTy htype = error $ "\nVHDLTools.mkVectorTy: Called for HType that is not a VecType: " ++ show htype
535 Int -- ^ The minimum bound (> 0)
536 -> Int -- ^ The maximum bound (> minimum bound)
537 -> TypeSession TypeMapRec
538 -- ^ An error message or The typemark created.
539 mkNaturalTy min_bound max_bound = do
540 let bitsize = floor (logBase 2 (fromInteger (toInteger max_bound)))
541 let ty_id = mkVHDLExtId $ "natural_" ++ (show min_bound) ++ "_to_" ++ (show max_bound)
542 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit $ show min_bound) (AST.PrimLit $ show bitsize)]
543 let ty_def = AST.SubtypeIn unsignedTM (Just range)
544 return (Just (ty_id, Just $ Right ty_def))
547 Int -- ^ Haskell type of the unsigned integer
548 -> TypeSession TypeMapRec
549 mkUnsignedTy size = do
550 let ty_id = mkVHDLExtId $ "unsigned_" ++ show (size - 1)
551 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (size - 1))]
552 let ty_def = AST.SubtypeIn unsignedTM (Just range)
553 return (Just (ty_id, Just $ Right ty_def))
556 Int -- ^ Haskell type of the signed integer
557 -> TypeSession TypeMapRec
559 let ty_id = mkVHDLExtId $ "signed_" ++ show (size - 1)
560 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (size - 1))]
561 let ty_def = AST.SubtypeIn signedTM (Just range)
562 return (Just (ty_id, Just $ Right ty_def))
564 -- Finds the field labels and types for aggregation HType. Returns an
565 -- error on other types.
567 HType -- ^ The HType to get fields for
568 -> Int -- ^ The constructor to get fields for (e.g., 0
569 -- for the first constructor, etc.)
570 -> [(String, HType)] -- ^ A list of fields, with their name and type
571 getFields htype dc_i = case htype of
572 (AggrType name _ fieldss)
573 | dc_i >= 0 && dc_i < length fieldss -> fieldss!!dc_i
574 | otherwise -> error $ "Invalid constructor index: " ++ (show dc_i) ++ ". No such constructor in HType: " ++ (show htype)
575 _ -> error $ "Can't get fields from non-aggregate HType: " ++ show htype
577 -- Finds the field labels for an aggregation type, as VHDLIds.
579 HType -- ^ The HType to get field labels for
580 -> Int -- ^ The constructor to get fields for (e.g., 0
581 -- for the first constructor, etc.)
582 -> [AST.VHDLId] -- ^ The labels
583 getFieldLabels htype dc_i = ((map mkVHDLBasicId) . (map fst)) (getFields htype dc_i)
585 -- Finds the field label for the constructor field, if any.
586 getConstructorFieldLabel ::
589 getConstructorFieldLabel (AggrType _ (Just con) _) =
590 Just $ mkVHDLBasicId (fst con)
591 getConstructorFieldLabel (AggrType _ Nothing _) =
593 getConstructorFieldLabel htype =
594 error $ "Can't get constructor field label from non-aggregate HType: " ++ show htype
596 mktydecl :: (AST.VHDLId, Maybe (Either AST.TypeDef AST.SubtypeIn)) -> Maybe AST.PackageDecItem
597 mytydecl (_, Nothing) = Nothing
598 mktydecl (ty_id, Just (Left ty_def)) = Just $ AST.PDITD $ AST.TypeDec ty_id ty_def
599 mktydecl (ty_id, Just (Right ty_def)) = Just $ AST.PDISD $ AST.SubtypeDec ty_id ty_def
602 [AST.TypeMark] -- ^ type of each tuple element
603 -> AST.TypeMark -- ^ type of the tuple
605 mkTupleShow elemTMs tupleTM = AST.SubProgBody showSpec [] [showExpr]
607 tupPar = AST.unsafeVHDLBasicId "tup"
608 showSpec = AST.Function showId [AST.IfaceVarDec tupPar tupleTM] stringTM
609 showExpr = AST.ReturnSm (Just $
610 AST.PrimLit "'('" AST.:&: showMiddle AST.:&: AST.PrimLit "')'")
612 showMiddle = if null elemTMs then
615 foldr1 (\e1 e2 -> e1 AST.:&: AST.PrimLit "','" AST.:&: e2) $
616 map ((genExprFCall showId).
619 (AST.NSimple tupPar AST.:.:).
621 (take tupSize recordlabels)
622 recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
623 tupSize = length elemTMs
629 mkEnumShow elemIds enumTM = AST.SubProgBody showSpec [] [showExpr]
631 enumPar = AST.unsafeVHDLBasicId "enum"
632 showSpec = AST.Function showId [AST.IfaceVarDec enumPar enumTM] stringTM
633 showExpr = AST.ReturnSm (Just $
634 AST.PrimLit (show $ tail $ init $ AST.fromVHDLId enumTM))
637 AST.TypeMark -- ^ elemtype
638 -> AST.TypeMark -- ^ vectype
639 -> [(String,AST.SubProgBody)]
640 mkVectorShow elemTM vectorTM =
641 [ (headId, AST.SubProgBody headSpec [] [headExpr])
642 , (tailId, AST.SubProgBody tailSpec [AST.SPVD tailVar] [tailExpr, tailRet])
643 , (showIdString, AST.SubProgBody showSpec [AST.SPSB doShowDef] [showRet])
646 vecPar = AST.unsafeVHDLBasicId "vec"
647 resId = AST.unsafeVHDLBasicId "res"
648 headSpec = AST.Function (mkVHDLExtId headId) [AST.IfaceVarDec vecPar vectorTM] elemTM
650 headExpr = AST.ReturnSm (Just (AST.PrimName $ AST.NIndexed (AST.IndexedName
651 (AST.NSimple vecPar) [AST.PrimLit "0"])))
652 vecSlice init last = AST.PrimName (AST.NSlice
655 (AST.ToRange init last)))
656 tailSpec = AST.Function (mkVHDLExtId tailId) [AST.IfaceVarDec vecPar vectorTM] vectorTM
657 -- variable res : fsvec_x (0 to vec'length-2);
660 (AST.SubtypeIn vectorTM
661 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
662 [AST.ToRange (AST.PrimLit "0")
663 (AST.PrimName (AST.NAttribute $
664 AST.AttribName (AST.NSimple vecPar) (AST.NSimple $ mkVHDLBasicId lengthId) Nothing) AST.:-:
665 (AST.PrimLit "2")) ]))
667 -- res AST.:= vec(1 to vec'length-1)
668 tailExpr = AST.NSimple resId AST.:= (vecSlice
670 (AST.PrimName (AST.NAttribute $
671 AST.AttribName (AST.NSimple vecPar) (AST.NSimple $ mkVHDLBasicId lengthId) Nothing)
672 AST.:-: AST.PrimLit "1"))
673 tailRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
674 showSpec = AST.Function showId [AST.IfaceVarDec vecPar vectorTM] stringTM
675 doShowId = AST.unsafeVHDLExtId "doshow"
676 doShowDef = AST.SubProgBody doShowSpec [] [doShowRet]
677 where doShowSpec = AST.Function doShowId [AST.IfaceVarDec vecPar vectorTM]
680 -- when 0 => return "";
681 -- when 1 => return head(vec);
682 -- when others => return show(head(vec)) & ',' &
683 -- doshow (tail(vec));
686 AST.CaseSm (AST.PrimName (AST.NAttribute $
687 AST.AttribName (AST.NSimple vecPar) (AST.NSimple $ mkVHDLBasicId lengthId) Nothing))
688 [AST.CaseSmAlt [AST.ChoiceE $ AST.PrimLit "0"]
689 [AST.ReturnSm (Just $ AST.PrimLit "\"\"")],
690 AST.CaseSmAlt [AST.ChoiceE $ AST.PrimLit "1"]
691 [AST.ReturnSm (Just $
693 (genExprFCall (mkVHDLExtId headId) (AST.PrimName $ AST.NSimple vecPar)) )],
694 AST.CaseSmAlt [AST.Others]
695 [AST.ReturnSm (Just $
697 (genExprFCall (mkVHDLExtId headId) (AST.PrimName $ AST.NSimple vecPar)) AST.:&:
698 AST.PrimLit "','" AST.:&:
699 genExprFCall doShowId
700 (genExprFCall (mkVHDLExtId tailId) (AST.PrimName $ AST.NSimple vecPar)) ) ]]
701 -- return '<' & doshow(vec) & '>';
702 showRet = AST.ReturnSm (Just $ AST.PrimLit "'<'" AST.:&:
703 genExprFCall doShowId (AST.PrimName $ AST.NSimple vecPar) AST.:&:
706 mkBuiltInShow :: [AST.SubProgBody]
707 mkBuiltInShow = [ AST.SubProgBody showBitSpec [] [showBitExpr]
708 , AST.SubProgBody showBoolSpec [] [showBoolExpr]
709 , AST.SubProgBody showSingedSpec [] [showSignedExpr]
710 , AST.SubProgBody showUnsignedSpec [] [showUnsignedExpr]
711 -- , AST.SubProgBody showNaturalSpec [] [showNaturalExpr]
714 bitPar = AST.unsafeVHDLBasicId "s"
715 boolPar = AST.unsafeVHDLBasicId "b"
716 signedPar = AST.unsafeVHDLBasicId "sint"
717 unsignedPar = AST.unsafeVHDLBasicId "uint"
718 -- naturalPar = AST.unsafeVHDLBasicId "nat"
719 showBitSpec = AST.Function showId [AST.IfaceVarDec bitPar std_logicTM] stringTM
720 -- if s = '1' then return "'1'" else return "'0'"
721 showBitExpr = AST.IfSm (AST.PrimName (AST.NSimple bitPar) AST.:=: AST.PrimLit "'1'")
722 [AST.ReturnSm (Just $ AST.PrimLit "\"High\"")]
724 (Just $ AST.Else [AST.ReturnSm (Just $ AST.PrimLit "\"Low\"")])
725 showBoolSpec = AST.Function showId [AST.IfaceVarDec boolPar booleanTM] stringTM
726 -- if b then return "True" else return "False"
727 showBoolExpr = AST.IfSm (AST.PrimName (AST.NSimple boolPar))
728 [AST.ReturnSm (Just $ AST.PrimLit "\"True\"")]
730 (Just $ AST.Else [AST.ReturnSm (Just $ AST.PrimLit "\"False\"")])
731 showSingedSpec = AST.Function showId [AST.IfaceVarDec signedPar signedTM] stringTM
732 showSignedExpr = AST.ReturnSm (Just $
733 AST.PrimName $ AST.NAttribute $ AST.AttribName (AST.NSimple integerId)
734 (AST.NIndexed $ AST.IndexedName (AST.NSimple imageId) [signToInt]) Nothing )
736 signToInt = genExprFCall (mkVHDLBasicId toIntegerId) (AST.PrimName $ AST.NSimple signedPar)
737 showUnsignedSpec = AST.Function showId [AST.IfaceVarDec unsignedPar unsignedTM] stringTM
738 showUnsignedExpr = AST.ReturnSm (Just $
739 AST.PrimName $ AST.NAttribute $ AST.AttribName (AST.NSimple integerId)
740 (AST.NIndexed $ AST.IndexedName (AST.NSimple imageId) [unsignToInt]) Nothing )
742 unsignToInt = genExprFCall (mkVHDLBasicId toIntegerId) (AST.PrimName $ AST.NSimple unsignedPar)
743 -- showNaturalSpec = AST.Function showId [AST.IfaceVarDec naturalPar naturalTM] stringTM
744 -- showNaturalExpr = AST.ReturnSm (Just $
745 -- AST.PrimName $ AST.NAttribute $ AST.AttribName (AST.NSimple integerId)
746 -- (AST.NIndexed $ AST.IndexedName (AST.NSimple imageId) [AST.PrimName $ AST.NSimple $ naturalPar]) Nothing )
749 genExprFCall :: AST.VHDLId -> AST.Expr -> AST.Expr
750 genExprFCall fName args =
751 AST.PrimFCall $ AST.FCall (AST.NSimple fName) $
752 map (\exp -> Nothing AST.:=>: AST.ADExpr exp) [args]
754 genExprPCall2 :: AST.VHDLId -> AST.Expr -> AST.Expr -> AST.SeqSm
755 genExprPCall2 entid arg1 arg2 =
756 AST.ProcCall (AST.NSimple entid) $
757 map (\exp -> Nothing AST.:=>: AST.ADExpr exp) [arg1,arg2]
759 mkSigDec :: CoreSyn.CoreBndr -> TranslatorSession (Maybe AST.SigDec)
761 let error_msg = "\nVHDL.mkSigDec: Can not make signal declaration for type: \n" ++ pprString bndr
762 type_mark_maybe <- MonadState.lift tsType $ vhdlTy error_msg (Var.varType bndr)
763 case type_mark_maybe of
764 Just type_mark -> return $ Just (AST.SigDec (varToVHDLId bndr) type_mark Nothing)
765 Nothing -> return Nothing
767 -- | Does the given thing have a non-empty type?
768 hasNonEmptyType :: (TypedThing t, Outputable.Outputable t) =>
769 t -> TranslatorSession Bool
770 hasNonEmptyType thing = MonadState.lift tsType $ isJustM (vhdlTy "hasNonEmptyType: Non representable type?" thing)