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 Just dc -> dataconToVHDLExpr dc
152 -- This is a dataconstructor.
153 -- Not a datacon, just another signal. Perhaps we should check for
154 -- local/global here as well?
155 -- Sadly so.. tfp decimals are types, not data constructors, but instances
156 -- should still be translated to integer literals. It is probebly not the
157 -- best solution to translate them here.
158 -- FIXME: Find a better solution for translating instances of tfp integers
160 let ty = Var.varType var
161 case Type.splitTyConApp_maybe ty of
162 Just (tycon, args) ->
163 case Name.getOccString (TyCon.tyConName tycon) of
166 return $ AST.PrimLit (show len)
167 otherwise -> return $ AST.PrimName $ AST.NSimple $ varToVHDLId var
169 -- Turn a VHDLName into an AST expression
170 vhdlNameToVHDLExpr = AST.PrimName
172 -- Turn a VHDL Id into an AST expression
173 idToVHDLExpr = vhdlNameToVHDLExpr . AST.NSimple
175 -- Turn a Core expression into an AST expression
176 exprToVHDLExpr core = varToVHDLExpr (exprToVar core)
178 -- Turn a alternative constructor into an AST expression. For
179 -- dataconstructors, this is only the constructor itself, not any arguments it
180 -- has. Should not be called with a DEFAULT constructor.
181 altconToVHDLExpr :: CoreSyn.AltCon -> TypeSession AST.Expr
182 altconToVHDLExpr (CoreSyn.DataAlt dc) = dataconToVHDLExpr dc
184 altconToVHDLExpr (CoreSyn.LitAlt _) = error "\nVHDL.conToVHDLExpr: Literals not support in case alternatives yet"
185 altconToVHDLExpr CoreSyn.DEFAULT = error "\nVHDL.conToVHDLExpr: DEFAULT alternative should not occur here!"
187 -- Turn a datacon (without arguments!) into a VHDL expression.
188 dataconToVHDLExpr :: DataCon.DataCon -> TypeSession AST.Expr
189 dataconToVHDLExpr dc = do
190 typemap <- MonadState.get tsTypes
191 htype_either <- mkHTypeEither (DataCon.dataConRepType dc)
195 let dcname = DataCon.dataConName dc
197 (BuiltinType "Bit") -> return $ AST.PrimLit $ case Name.getOccString dcname of "High" -> "'1'"; "Low" -> "'0'"
198 (BuiltinType "Bool") -> return $ AST.PrimLit $ case Name.getOccString dcname of "True" -> "true"; "False" -> "false"
200 let existing_ty = Monad.liftM (fmap fst) $ Map.lookup htype typemap
203 let lit = idToVHDLExpr $ mkVHDLExtId $ Name.getOccString dcname
205 Nothing -> error $ "\nVHDLTools.dataconToVHDLExpr: Trying to make value for non-representable DataCon: " ++ pprString dc
206 -- Error when constructing htype
207 Left err -> error err
209 -----------------------------------------------------------------------------
210 -- Functions dealing with names, variables and ids
211 -----------------------------------------------------------------------------
213 -- Creates a VHDL Id from a binder
217 varToVHDLId var = mkVHDLExtId (varToString var ++ varToStringUniq var ++ show (lowers $ varToStringUniq var))
219 lowers :: String -> Int
220 lowers xs = length [x | x <- xs, Char.isLower x]
222 -- Creates a VHDL Name from a binder
226 varToVHDLName = AST.NSimple . varToVHDLId
228 -- Extracts the binder name as a String
232 varToString = OccName.occNameString . Name.nameOccName . Var.varName
234 -- Get the string version a Var's unique
235 varToStringUniq :: Var.Var -> String
236 varToStringUniq = show . Var.varUnique
238 -- Extracts the string version of the name
239 nameToString :: Name.Name -> String
240 nameToString = OccName.occNameString . Name.nameOccName
242 -- Shortcut for Basic VHDL Ids.
243 -- Can only contain alphanumerics and underscores. The supplied string must be
244 -- a valid basic id, otherwise an error value is returned. This function is
245 -- not meant to be passed identifiers from a source file, use mkVHDLExtId for
247 mkVHDLBasicId :: String -> AST.VHDLId
249 AST.unsafeVHDLBasicId $ (strip_multiscore . strip_leading . strip_invalid) s
251 -- Strip invalid characters.
252 strip_invalid = filter (`elem` ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ "_.")
253 -- Strip leading numbers and underscores
254 strip_leading = dropWhile (`elem` ['0'..'9'] ++ "_")
255 -- Strip multiple adjacent underscores
256 strip_multiscore = concatMap (\cs ->
262 -- Shortcut for Extended VHDL Id's. These Id's can contain a lot more
263 -- different characters than basic ids, but can never be used to refer to
265 -- Use extended Ids for any values that are taken from the source file.
266 mkVHDLExtId :: String -> AST.VHDLId
268 AST.unsafeVHDLExtId $ strip_invalid s
270 -- Allowed characters, taken from ForSyde's mkVHDLExtId
271 allowed = ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ " \"#&'()*+,./:;<=>_|!$%@?[]^`{}~-"
272 strip_invalid = filter (`elem` allowed)
274 -- Create a record field selector that selects the given label from the record
275 -- stored in the given binder.
276 mkSelectedName :: AST.VHDLName -> AST.VHDLId -> AST.VHDLName
277 mkSelectedName name label =
278 AST.NSelected $ name AST.:.: (AST.SSimple label)
280 -- Create an indexed name that selects a given element from a vector.
281 mkIndexedName :: AST.VHDLName -> AST.Expr -> AST.VHDLName
282 -- Special case for already indexed names. Just add an index
283 mkIndexedName (AST.NIndexed (AST.IndexedName name indexes)) index =
284 AST.NIndexed (AST.IndexedName name (indexes++[index]))
285 -- General case for other names
286 mkIndexedName name index = AST.NIndexed (AST.IndexedName name [index])
288 -----------------------------------------------------------------------------
289 -- Functions dealing with VHDL types
290 -----------------------------------------------------------------------------
291 builtin_types :: TypeMap
294 (BuiltinType "Bit", Just (std_logicTM, Nothing)),
295 (BuiltinType "Bool", Just (booleanTM, Nothing)), -- TysWiredIn.boolTy
296 (BuiltinType "Dec", Just (integerTM, Nothing))
299 -- Is the given type representable at runtime?
300 isReprType :: Type.Type -> TypeSession Bool
302 ty_either <- mkHTypeEither ty
303 return $ case ty_either of
307 mkHType :: (TypedThing t, Outputable.Outputable t) =>
308 String -> t -> TypeSession HType
310 htype_either <- mkHTypeEither ty
312 Right htype -> return htype
313 Left err -> error $ msg ++ err
315 mkHTypeEither :: (TypedThing t, Outputable.Outputable t) =>
316 t -> TypeSession (Either String HType)
317 mkHTypeEither tything =
318 case getType tything of
319 Nothing -> return $ Left $ "\nVHDLTools.mkHTypeEither: Typed thing without a type: " ++ pprString tything
320 Just ty -> mkHTypeEither' ty
322 mkHTypeEither' :: Type.Type -> TypeSession (Either String HType)
323 mkHTypeEither' ty | ty_has_free_tyvars ty = return $ Left $ "\nVHDLTools.mkHTypeEither': Cannot create type: type has free type variables: " ++ pprString ty
324 | isStateType ty = return $ Right StateType
326 case Type.splitTyConApp_maybe ty of
327 Just (tycon, args) -> do
328 typemap <- MonadState.get tsTypes
329 let name = Name.getOccString (TyCon.tyConName tycon)
330 let builtinTyMaybe = Map.lookup (BuiltinType name) typemap
331 case builtinTyMaybe of
332 (Just x) -> return $ Right $ BuiltinType name
336 let el_ty = tfvec_elem ty
337 elem_htype_either <- mkHTypeEither el_ty
338 case elem_htype_either of
339 -- Could create element type
340 Right elem_htype -> do
341 len <- tfp_to_int (tfvec_len_ty ty)
342 return $ Right $ VecType len elem_htype
343 -- Could not create element type
344 Left err -> return $ Left $
345 "\nVHDLTools.mkHTypeEither': Can not construct vectortype for elementtype: " ++ pprString el_ty ++ err
347 len <- tfp_to_int (sized_word_len_ty ty)
348 return $ Right $ SizedWType len
350 len <- tfp_to_int (sized_word_len_ty ty)
351 return $ Right $ SizedIType len
353 bound <- tfp_to_int (ranged_word_bound_ty ty)
354 return $ Right $ RangedWType bound
356 mkTyConHType tycon args
357 Nothing -> return $ Left $ "\nVHDLTools.mkHTypeEither': Do not know what to do with type: " ++ pprString ty
359 mkTyConHType :: TyCon.TyCon -> [Type.Type] -> TypeSession (Either String HType)
360 mkTyConHType tycon args =
361 case TyCon.tyConDataCons tycon of
362 -- Not an algebraic type
363 [] -> return $ Left $ "VHDLTools.mkTyConHType: Only custom algebraic types are supported: " ++ pprString tycon
365 let arg_tys = DataCon.dataConRepArgTys dc
366 let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
367 let real_arg_tys_nostate = filter (\x -> not (isStateType x)) real_arg_tys
368 elem_htys_either <- mapM mkHTypeEither real_arg_tys_nostate
369 case Either.partitionEithers elem_htys_either of
371 return $ Right elem_hty
372 -- No errors in element types
374 return $ Right $ AggrType (nameToString (TyCon.tyConName tycon)) elem_htys
375 -- There were errors in element types
376 (errors, _) -> return $ Left $
377 "\nVHDLTools.mkTyConHType: Can not construct type for: " ++ pprString tycon ++ "\n because no type can be construced for some of the arguments.\n"
380 let arg_tys = concatMap DataCon.dataConRepArgTys dcs
381 let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
384 return $ Right $ EnumType (nameToString (TyCon.tyConName tycon)) (map (nameToString . DataCon.dataConName) dcs)
385 xs -> return $ Left $
386 "VHDLTools.mkTyConHType: Only enum-like constructor datatypes supported: " ++ pprString dcs ++ "\n"
388 tyvars = TyCon.tyConTyVars tycon
389 subst = CoreSubst.extendTvSubstList CoreSubst.emptySubst (zip tyvars args)
391 -- Translate a Haskell type to a VHDL type, generating a new type if needed.
392 -- Returns an error value, using the given message, when no type could be
393 -- created. Returns Nothing when the type is valid, but empty.
394 vhdlTy :: (TypedThing t, Outputable.Outputable t) =>
395 String -> t -> TypeSession (Maybe AST.TypeMark)
397 htype <- mkHType msg ty
400 vhdlTyMaybe :: HType -> TypeSession (Maybe AST.TypeMark)
401 vhdlTyMaybe htype = do
402 typemap <- MonadState.get tsTypes
403 -- If not a builtin type, try the custom types
404 let existing_ty = Map.lookup htype typemap
406 -- Found a type, return it
407 Just (Just (t, _)) -> return $ Just t
408 Just (Nothing) -> return Nothing
409 -- No type yet, try to construct it
411 newty <- (construct_vhdl_ty htype)
412 MonadState.modify tsTypes (Map.insert htype newty)
414 Just (ty_id, ty_def) -> do
415 MonadState.modify tsTypeDecls (\typedefs -> typedefs ++ [mktydecl (ty_id, ty_def)])
417 Nothing -> return Nothing
419 -- Construct a new VHDL type for the given Haskell type. Returns an error
420 -- message or the resulting typemark and typedef.
421 construct_vhdl_ty :: HType -> TypeSession TypeMapRec
422 -- State types don't generate VHDL
423 construct_vhdl_ty htype =
425 StateType -> return Nothing
426 (SizedWType w) -> mkUnsignedTy w
427 (SizedIType i) -> mkSignedTy i
428 (RangedWType u) -> mkNaturalTy 0 u
429 (VecType n e) -> mkVectorTy (VecType n e)
430 -- Create a custom type from this tycon
431 otherwise -> mkTyconTy htype
433 -- | Create VHDL type for a custom tycon
434 mkTyconTy :: HType -> TypeSession TypeMapRec
437 (AggrType tycon args) -> do
438 elemTysMaybe <- mapM vhdlTyMaybe args
439 case Maybe.catMaybes elemTysMaybe of
440 [] -> -- No non-empty members
443 let elems = zipWith AST.ElementDec recordlabels elem_tys
444 let elem_names = concatMap prettyShow elem_tys
445 let ty_id = mkVHDLExtId $ tycon ++ elem_names
446 let ty_def = AST.TDR $ AST.RecordTypeDef elems
447 let tupshow = mkTupleShow elem_tys ty_id
448 MonadState.modify tsTypeFuns $ Map.insert (htype, showIdString) (showId, tupshow)
449 return $ Just (ty_id, Just $ Left ty_def)
450 (EnumType tycon dcs) -> do
451 let elems = map mkVHDLExtId dcs
452 let ty_id = mkVHDLExtId tycon
453 let ty_def = AST.TDE $ AST.EnumTypeDef elems
454 let enumShow = mkEnumShow elems ty_id
455 MonadState.modify tsTypeFuns $ Map.insert (htype, showIdString) (showId, enumShow)
456 return $ Just (ty_id, Just $ Left ty_def)
457 otherwise -> error $ "\nVHDLTools.mkTyconTy: Called for HType that is neiter a AggrType or EnumType: " ++ show htype
459 -- Generate a bunch of labels for fields of a record
460 recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
462 -- | Create a VHDL vector type
464 HType -- ^ The Haskell type of the Vector
465 -> TypeSession TypeMapRec
466 -- ^ An error message or The typemark created.
468 mkVectorTy (VecType len elHType) = do
469 typesMap <- MonadState.get tsTypes
470 elTyTmMaybe <- vhdlTyMaybe elHType
473 let ty_id = mkVHDLExtId $ "vector-"++ (AST.fromVHDLId elTyTm) ++ "-0_to_" ++ (show len)
474 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len - 1))]
475 let existing_uvec_ty = fmap (fmap fst) $ Map.lookup (UVecType elHType) typesMap
476 case existing_uvec_ty of
478 let ty_def = AST.SubtypeIn t (Just range)
479 return (Just (ty_id, Just $ Right ty_def))
481 let vec_id = mkVHDLExtId $ "vector_" ++ (AST.fromVHDLId elTyTm)
482 let vec_def = AST.TDA $ AST.UnconsArrayDef [tfvec_indexTM] elTyTm
483 MonadState.modify tsTypes (Map.insert (UVecType elHType) (Just (vec_id, (Just $ Left vec_def))))
484 MonadState.modify tsTypeDecls (\typedefs -> typedefs ++ [mktydecl (vec_id, (Just $ Left vec_def))])
485 let vecShowFuns = mkVectorShow elTyTm vec_id
486 mapM_ (\(id, subprog) -> MonadState.modify tsTypeFuns $ Map.insert (UVecType elHType, id) ((mkVHDLExtId id), subprog)) vecShowFuns
487 let ty_def = AST.SubtypeIn vec_id (Just range)
488 return (Just (ty_id, Just $ Right ty_def))
489 Nothing -> return Nothing
490 mkVectorTy htype = error $ "\nVHDLTools.mkVectorTy: Called for HType that is not a VecType: " ++ show htype
493 Int -- ^ The minimum bound (> 0)
494 -> Int -- ^ The maximum bound (> minimum bound)
495 -> TypeSession TypeMapRec
496 -- ^ An error message or The typemark created.
497 mkNaturalTy min_bound max_bound = do
498 let bitsize = floor (logBase 2 (fromInteger (toInteger max_bound)))
499 let ty_id = mkVHDLExtId $ "natural_" ++ (show min_bound) ++ "_to_" ++ (show max_bound)
500 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit $ show min_bound) (AST.PrimLit $ show bitsize)]
501 let ty_def = AST.SubtypeIn unsignedTM (Just range)
502 return (Just (ty_id, Just $ Right ty_def))
505 Int -- ^ Haskell type of the unsigned integer
506 -> TypeSession TypeMapRec
507 mkUnsignedTy size = do
508 let ty_id = mkVHDLExtId $ "unsigned_" ++ show (size - 1)
509 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (size - 1))]
510 let ty_def = AST.SubtypeIn unsignedTM (Just range)
511 return (Just (ty_id, Just $ Right ty_def))
514 Int -- ^ Haskell type of the signed integer
515 -> TypeSession TypeMapRec
517 let ty_id = mkVHDLExtId $ "signed_" ++ show (size - 1)
518 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (size - 1))]
519 let ty_def = AST.SubtypeIn signedTM (Just range)
520 return (Just (ty_id, Just $ Right ty_def))
522 -- Finds the field labels for VHDL type generated for the given Core type,
523 -- which must result in a record type.
524 getFieldLabels :: Type.Type -> TypeSession [AST.VHDLId]
525 getFieldLabels ty = do
526 -- Ensure that the type is generated (but throw away it's VHDLId)
527 let error_msg = "\nVHDLTools.getFieldLabels: Can not get field labels, because: " ++ pprString ty ++ "can not be generated."
529 -- Get the types map, lookup and unpack the VHDL TypeDef
530 types <- MonadState.get tsTypes
531 -- Assume the type for which we want labels is really translatable
532 htype <- mkHType error_msg ty
533 case Map.lookup htype types of
534 Just (Just (_, Just (Left (AST.TDR (AST.RecordTypeDef elems))))) -> return $ map (\(AST.ElementDec id _) -> id) elems
535 Just Nothing -> return [] -- The type is empty
536 _ -> error $ "\nVHDL.getFieldLabels: Type not found or not a record type? This should not happen! Type: " ++ (show htype)
538 mktydecl :: (AST.VHDLId, Maybe (Either AST.TypeDef AST.SubtypeIn)) -> Maybe AST.PackageDecItem
539 mytydecl (_, Nothing) = Nothing
540 mktydecl (ty_id, Just (Left ty_def)) = Just $ AST.PDITD $ AST.TypeDec ty_id ty_def
541 mktydecl (ty_id, Just (Right ty_def)) = Just $ AST.PDISD $ AST.SubtypeDec ty_id ty_def
543 tfp_to_int :: Type.Type -> TypeSession Int
545 hscenv <- MonadState.get tsHscEnv
546 let norm_ty = normalise_tfp_int hscenv ty
547 case Type.splitTyConApp_maybe norm_ty of
548 Just (tycon, args) -> do
549 let name = Name.getOccString (TyCon.tyConName tycon)
554 MonadState.modify tsTfpInts (Map.insert (OrdType norm_ty) (-1))
555 return $ error ("Callin tfp_to_int on non-dec:" ++ (show ty))
556 Nothing -> return $ error ("Callin tfp_to_int on non-dec:" ++ (show ty))
558 tfp_to_int' :: Type.Type -> TypeSession Int
560 lens <- MonadState.get tsTfpInts
561 hscenv <- MonadState.get tsHscEnv
562 let norm_ty = normalise_tfp_int hscenv ty
563 let existing_len = Map.lookup (OrdType norm_ty) lens
565 Just len -> return len
567 let new_len = eval_tfp_int hscenv ty
568 MonadState.modify tsTfpInts (Map.insert (OrdType norm_ty) (new_len))
572 [AST.TypeMark] -- ^ type of each tuple element
573 -> AST.TypeMark -- ^ type of the tuple
575 mkTupleShow elemTMs tupleTM = AST.SubProgBody showSpec [] [showExpr]
577 tupPar = AST.unsafeVHDLBasicId "tup"
578 showSpec = AST.Function showId [AST.IfaceVarDec tupPar tupleTM] stringTM
579 showExpr = AST.ReturnSm (Just $
580 AST.PrimLit "'('" AST.:&: showMiddle AST.:&: AST.PrimLit "')'")
582 showMiddle = if null elemTMs then
585 foldr1 (\e1 e2 -> e1 AST.:&: AST.PrimLit "','" AST.:&: e2) $
586 map ((genExprFCall showId).
589 (AST.NSimple tupPar AST.:.:).
591 (take tupSize recordlabels)
592 recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
593 tupSize = length elemTMs
599 mkEnumShow elemIds enumTM = AST.SubProgBody showSpec [] [showExpr]
601 enumPar = AST.unsafeVHDLBasicId "enum"
602 showSpec = AST.Function showId [AST.IfaceVarDec enumPar enumTM] stringTM
603 showExpr = AST.ReturnSm (Just $
604 AST.PrimLit (show $ tail $ init $ AST.fromVHDLId enumTM))
607 AST.TypeMark -- ^ elemtype
608 -> AST.TypeMark -- ^ vectype
609 -> [(String,AST.SubProgBody)]
610 mkVectorShow elemTM vectorTM =
611 [ (headId, AST.SubProgBody headSpec [] [headExpr])
612 , (tailId, AST.SubProgBody tailSpec [AST.SPVD tailVar] [tailExpr, tailRet])
613 , (showIdString, AST.SubProgBody showSpec [AST.SPSB doShowDef] [showRet])
616 vecPar = AST.unsafeVHDLBasicId "vec"
617 resId = AST.unsafeVHDLBasicId "res"
618 headSpec = AST.Function (mkVHDLExtId headId) [AST.IfaceVarDec vecPar vectorTM] elemTM
620 headExpr = AST.ReturnSm (Just (AST.PrimName $ AST.NIndexed (AST.IndexedName
621 (AST.NSimple vecPar) [AST.PrimLit "0"])))
622 vecSlice init last = AST.PrimName (AST.NSlice
625 (AST.ToRange init last)))
626 tailSpec = AST.Function (mkVHDLExtId tailId) [AST.IfaceVarDec vecPar vectorTM] vectorTM
627 -- variable res : fsvec_x (0 to vec'length-2);
630 (AST.SubtypeIn vectorTM
631 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
632 [AST.ToRange (AST.PrimLit "0")
633 (AST.PrimName (AST.NAttribute $
634 AST.AttribName (AST.NSimple vecPar) (AST.NSimple $ mkVHDLBasicId lengthId) Nothing) AST.:-:
635 (AST.PrimLit "2")) ]))
637 -- res AST.:= vec(1 to vec'length-1)
638 tailExpr = AST.NSimple resId AST.:= (vecSlice
640 (AST.PrimName (AST.NAttribute $
641 AST.AttribName (AST.NSimple vecPar) (AST.NSimple $ mkVHDLBasicId lengthId) Nothing)
642 AST.:-: AST.PrimLit "1"))
643 tailRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
644 showSpec = AST.Function showId [AST.IfaceVarDec vecPar vectorTM] stringTM
645 doShowId = AST.unsafeVHDLExtId "doshow"
646 doShowDef = AST.SubProgBody doShowSpec [] [doShowRet]
647 where doShowSpec = AST.Function doShowId [AST.IfaceVarDec vecPar vectorTM]
650 -- when 0 => return "";
651 -- when 1 => return head(vec);
652 -- when others => return show(head(vec)) & ',' &
653 -- doshow (tail(vec));
656 AST.CaseSm (AST.PrimName (AST.NAttribute $
657 AST.AttribName (AST.NSimple vecPar) (AST.NSimple $ mkVHDLBasicId lengthId) Nothing))
658 [AST.CaseSmAlt [AST.ChoiceE $ AST.PrimLit "0"]
659 [AST.ReturnSm (Just $ AST.PrimLit "\"\"")],
660 AST.CaseSmAlt [AST.ChoiceE $ AST.PrimLit "1"]
661 [AST.ReturnSm (Just $
663 (genExprFCall (mkVHDLExtId headId) (AST.PrimName $ AST.NSimple vecPar)) )],
664 AST.CaseSmAlt [AST.Others]
665 [AST.ReturnSm (Just $
667 (genExprFCall (mkVHDLExtId headId) (AST.PrimName $ AST.NSimple vecPar)) AST.:&:
668 AST.PrimLit "','" AST.:&:
669 genExprFCall doShowId
670 (genExprFCall (mkVHDLExtId tailId) (AST.PrimName $ AST.NSimple vecPar)) ) ]]
671 -- return '<' & doshow(vec) & '>';
672 showRet = AST.ReturnSm (Just $ AST.PrimLit "'<'" AST.:&:
673 genExprFCall doShowId (AST.PrimName $ AST.NSimple vecPar) AST.:&:
676 mkBuiltInShow :: [AST.SubProgBody]
677 mkBuiltInShow = [ AST.SubProgBody showBitSpec [] [showBitExpr]
678 , AST.SubProgBody showBoolSpec [] [showBoolExpr]
679 , AST.SubProgBody showSingedSpec [] [showSignedExpr]
680 , AST.SubProgBody showUnsignedSpec [] [showUnsignedExpr]
681 -- , AST.SubProgBody showNaturalSpec [] [showNaturalExpr]
684 bitPar = AST.unsafeVHDLBasicId "s"
685 boolPar = AST.unsafeVHDLBasicId "b"
686 signedPar = AST.unsafeVHDLBasicId "sint"
687 unsignedPar = AST.unsafeVHDLBasicId "uint"
688 -- naturalPar = AST.unsafeVHDLBasicId "nat"
689 showBitSpec = AST.Function showId [AST.IfaceVarDec bitPar std_logicTM] stringTM
690 -- if s = '1' then return "'1'" else return "'0'"
691 showBitExpr = AST.IfSm (AST.PrimName (AST.NSimple bitPar) AST.:=: AST.PrimLit "'1'")
692 [AST.ReturnSm (Just $ AST.PrimLit "\"High\"")]
694 (Just $ AST.Else [AST.ReturnSm (Just $ AST.PrimLit "\"Low\"")])
695 showBoolSpec = AST.Function showId [AST.IfaceVarDec boolPar booleanTM] stringTM
696 -- if b then return "True" else return "False"
697 showBoolExpr = AST.IfSm (AST.PrimName (AST.NSimple boolPar))
698 [AST.ReturnSm (Just $ AST.PrimLit "\"True\"")]
700 (Just $ AST.Else [AST.ReturnSm (Just $ AST.PrimLit "\"False\"")])
701 showSingedSpec = AST.Function showId [AST.IfaceVarDec signedPar signedTM] stringTM
702 showSignedExpr = AST.ReturnSm (Just $
703 AST.PrimName $ AST.NAttribute $ AST.AttribName (AST.NSimple integerId)
704 (AST.NIndexed $ AST.IndexedName (AST.NSimple imageId) [signToInt]) Nothing )
706 signToInt = genExprFCall (mkVHDLBasicId toIntegerId) (AST.PrimName $ AST.NSimple signedPar)
707 showUnsignedSpec = AST.Function showId [AST.IfaceVarDec unsignedPar unsignedTM] stringTM
708 showUnsignedExpr = AST.ReturnSm (Just $
709 AST.PrimName $ AST.NAttribute $ AST.AttribName (AST.NSimple integerId)
710 (AST.NIndexed $ AST.IndexedName (AST.NSimple imageId) [unsignToInt]) Nothing )
712 unsignToInt = genExprFCall (mkVHDLBasicId toIntegerId) (AST.PrimName $ AST.NSimple unsignedPar)
713 -- showNaturalSpec = AST.Function showId [AST.IfaceVarDec naturalPar naturalTM] stringTM
714 -- showNaturalExpr = AST.ReturnSm (Just $
715 -- AST.PrimName $ AST.NAttribute $ AST.AttribName (AST.NSimple integerId)
716 -- (AST.NIndexed $ AST.IndexedName (AST.NSimple imageId) [AST.PrimName $ AST.NSimple $ naturalPar]) Nothing )
719 genExprFCall :: AST.VHDLId -> AST.Expr -> AST.Expr
720 genExprFCall fName args =
721 AST.PrimFCall $ AST.FCall (AST.NSimple fName) $
722 map (\exp -> Nothing AST.:=>: AST.ADExpr exp) [args]
724 genExprPCall2 :: AST.VHDLId -> AST.Expr -> AST.Expr -> AST.SeqSm
725 genExprPCall2 entid arg1 arg2 =
726 AST.ProcCall (AST.NSimple entid) $
727 map (\exp -> Nothing AST.:=>: AST.ADExpr exp) [arg1,arg2]
729 mkSigDec :: CoreSyn.CoreBndr -> TranslatorSession (Maybe AST.SigDec)
731 let error_msg = "\nVHDL.mkSigDec: Can not make signal declaration for type: \n" ++ pprString bndr
732 type_mark_maybe <- MonadState.lift tsType $ vhdlTy error_msg (Var.varType bndr)
733 case type_mark_maybe of
734 Just type_mark -> return $ Just (AST.SigDec (varToVHDLId bndr) type_mark Nothing)
735 Nothing -> return Nothing
737 -- | Does the given thing have a non-empty type?
738 hasNonEmptyType :: (TypedThing t, Outputable.Outputable t) =>
739 t -> TranslatorSession Bool
740 hasNonEmptyType thing = MonadState.lift tsType $ isJustM (vhdlTy "hasNonEmptyType: Non representable type?" thing)