2 -- Functions to generate VHDL from FlatFunctions
7 import qualified Data.Foldable as Foldable
8 import qualified Data.List as List
9 import qualified Data.Map as Map
10 import qualified Maybe
11 import qualified Control.Monad as Monad
12 import qualified Control.Arrow as Arrow
13 import qualified Control.Monad.Trans.State as State
14 import qualified Data.Traversable as Traversable
15 import qualified Data.Monoid as Monoid
17 import qualified Data.Accessor.MonadState as MonadState
18 import Text.Regex.Posix
22 import qualified ForSyDe.Backend.VHDL.AST as AST
28 import qualified OccName
31 import qualified IdInfo
32 import qualified TyCon
33 import qualified TcType
34 import qualified DataCon
35 import qualified CoreSubst
36 import qualified CoreUtils
37 import Outputable ( showSDoc, ppr )
43 import TranslatorTypes
49 import GlobalNameTable
52 [(CoreSyn.CoreBndr, CoreSyn.CoreExpr)]
53 -> [(AST.VHDLId, AST.DesignFile)]
55 createDesignFiles binds =
56 (mkVHDLBasicId "types", AST.DesignFile ieee_context [type_package_dec, type_package_body]) :
57 map (Arrow.second $ AST.DesignFile full_context) units
60 init_session = VHDLSession Map.empty Map.empty Map.empty Map.empty globalNameTable
61 (units, final_session) =
62 State.runState (createLibraryUnits binds) init_session
63 tyfun_decls = Map.elems (final_session ^.vsTypeFuns)
64 ty_decls = map mktydecl $ Map.elems (final_session ^. vsTypes)
65 vec_decls = map (\(v_id, v_def) -> AST.PDITD $ AST.TypeDec v_id v_def) (Map.elems (final_session ^. vsElemTypes))
66 tfvec_index_decl = AST.PDISD $ AST.SubtypeDec tfvec_indexTM tfvec_index_def
67 tfvec_range = AST.ConstraintRange $ AST.SubTypeRange (AST.PrimLit "-1") (AST.PrimName $ AST.NAttribute $ AST.AttribName (AST.NSimple integerTM) highId Nothing)
68 tfvec_index_def = AST.SubtypeIn integerTM (Just tfvec_range)
70 AST.Library $ mkVHDLBasicId "IEEE",
71 mkUseAll ["IEEE", "std_logic_1164"],
72 mkUseAll ["IEEE", "numeric_std"]
75 mkUseAll ["work", "types"]
77 type_package_dec = AST.LUPackageDec $ AST.PackageDec (mkVHDLBasicId "types") ([tfvec_index_decl] ++ vec_decls ++ ty_decls ++ subProgSpecs)
78 type_package_body = AST.LUPackageBody $ AST.PackageBody typesId (concat tyfun_decls)
79 subProgSpecs = concat (map subProgSpec tyfun_decls)
80 subProgSpec = map (\(AST.SubProgBody spec _ _) -> AST.PDISS spec)
81 mktydecl :: (AST.VHDLId, Either AST.TypeDef AST.SubtypeIn) -> AST.PackageDecItem
82 mktydecl (ty_id, Left ty_def) = AST.PDITD $ AST.TypeDec ty_id ty_def
83 mktydecl (ty_id, Right ty_def) = AST.PDISD $ AST.SubtypeDec ty_id ty_def
85 -- Create a use foo.bar.all statement. Takes a list of components in the used
86 -- name. Must contain at least two components
87 mkUseAll :: [String] -> AST.ContextItem
89 AST.Use $ from AST.:.: AST.All
91 base_prefix = (AST.NSimple $ mkVHDLBasicId $ head ss)
92 from = foldl select base_prefix (tail ss)
93 select prefix s = AST.NSelected $ prefix AST.:.: (AST.SSimple $ mkVHDLBasicId s)
96 [(CoreSyn.CoreBndr, CoreSyn.CoreExpr)]
97 -> VHDLState [(AST.VHDLId, [AST.LibraryUnit])]
99 createLibraryUnits binds = do
100 entities <- Monad.mapM createEntity binds
101 archs <- Monad.mapM createArchitecture binds
104 let AST.EntityDec id _ = ent in
105 (id, [AST.LUEntity ent, AST.LUArch arch])
109 -- | Create an entity for a given function
111 (CoreSyn.CoreBndr, CoreSyn.CoreExpr) -- | The function
112 -> VHDLState AST.EntityDec -- | The resulting entity
114 createEntity (fname, expr) = do
115 -- Strip off lambda's, these will be arguments
116 let (args, letexpr) = CoreSyn.collectBinders expr
117 args' <- Monad.mapM mkMap args
118 -- There must be a let at top level
119 let (CoreSyn.Let binds (CoreSyn.Var res)) = letexpr
121 let vhdl_id = mkVHDLBasicId $ bndrToString fname ++ "_" ++ varToStringUniq fname
122 let ent_decl' = createEntityAST vhdl_id args' res'
123 let AST.EntityDec entity_id _ = ent_decl'
124 let signature = Entity entity_id args' res'
125 modA vsSignatures (Map.insert fname signature)
129 --[(SignalId, SignalInfo)]
131 -> VHDLState VHDLSignalMapElement
132 -- We only need the vsTypes element from the state
135 --info = Maybe.fromMaybe
136 -- (error $ "Signal not found in the name map? This should not happen!")
137 -- (lookup id sigmap)
138 -- Assume the bndr has a valid VHDL id already
139 id = bndrToVHDLId bndr
140 ty = Var.varType bndr
142 if True -- isPortSigUse $ sigUse info
144 type_mark <- vhdl_ty ty
145 return $ Just (id, type_mark)
150 -- | Create the VHDL AST for an entity
152 AST.VHDLId -- | The name of the function
153 -> [VHDLSignalMapElement] -- | The entity's arguments
154 -> VHDLSignalMapElement -- | The entity's result
155 -> AST.EntityDec -- | The entity with the ent_decl filled in as well
157 createEntityAST vhdl_id args res =
158 AST.EntityDec vhdl_id ports
160 -- Create a basic Id, since VHDL doesn't grok filenames with extended Ids.
161 ports = Maybe.catMaybes $
162 map (mkIfaceSigDec AST.In) args
163 ++ [mkIfaceSigDec AST.Out res]
165 -- Add a clk port if we have state
166 clk_port = if True -- hasState hsfunc
168 Just $ AST.IfaceSigDec (mkVHDLExtId "clk") AST.In VHDL.std_logic_ty
172 -- | Create a port declaration
174 AST.Mode -- | The mode for the port (In / Out)
175 -> Maybe (AST.VHDLId, AST.TypeMark) -- | The id and type for the port
176 -> Maybe AST.IfaceSigDec -- | The resulting port declaration
178 mkIfaceSigDec mode (Just (id, ty)) = Just $ AST.IfaceSigDec id mode ty
179 mkIfaceSigDec _ Nothing = Nothing
181 -- | Generate a VHDL entity name for the given hsfunc
183 -- TODO: This doesn't work for functions with multiple signatures!
184 -- Use a Basic Id, since using extended id's for entities throws off
185 -- precision and causes problems when generating filenames.
186 mkVHDLBasicId $ hsFuncName hsfunc
188 -- | Create an architecture for a given function
189 createArchitecture ::
190 (CoreSyn.CoreBndr, CoreSyn.CoreExpr) -- ^ The function
191 -> VHDLState AST.ArchBody -- ^ The architecture for this function
193 createArchitecture (fname, expr) = do
194 signaturemap <- getA vsSignatures
195 let signature = Maybe.fromMaybe
196 (error $ "Generating architecture for function " ++ (pprString fname) ++ "without signature? This should not happen!")
197 (Map.lookup fname signaturemap)
198 let entity_id = ent_id signature
199 -- Strip off lambda's, these will be arguments
200 let (args, letexpr) = CoreSyn.collectBinders expr
201 -- There must be a let at top level
202 let (CoreSyn.Let (CoreSyn.Rec binds) (Var res)) = letexpr
204 -- Create signal declarations for all binders in the let expression, except
205 -- for the output port (that will already have an output port declared in
207 sig_dec_maybes <- mapM (mkSigDec' . fst) (filter ((/=res).fst) binds)
208 let sig_decs = Maybe.catMaybes $ sig_dec_maybes
210 statementss <- Monad.mapM mkConcSm binds
211 let statements = concat statementss
212 return $ AST.ArchBody (mkVHDLBasicId "structural") (AST.NSimple entity_id) (map AST.BDISD sig_decs) (statements ++ procs')
214 procs = map mkStateProcSm [] -- (makeStatePairs flatfunc)
215 procs' = map AST.CSPSm procs
216 -- mkSigDec only uses vsTypes from the state
219 -- | Looks up all pairs of old state, new state signals, together with
220 -- the state id they represent.
221 makeStatePairs :: FlatFunction -> [(StateId, SignalInfo, SignalInfo)]
222 makeStatePairs flatfunc =
223 [(Maybe.fromJust $ oldStateId $ sigUse old_info, old_info, new_info)
224 | old_info <- map snd (flat_sigs flatfunc)
225 , new_info <- map snd (flat_sigs flatfunc)
226 -- old_info must be an old state (and, because of the next equality,
227 -- new_info must be a new state).
228 , Maybe.isJust $ oldStateId $ sigUse old_info
229 -- And the state numbers must match
230 , (oldStateId $ sigUse old_info) == (newStateId $ sigUse new_info)]
232 -- Replace the second tuple element with the corresponding SignalInfo
233 --args_states = map (Arrow.second $ signalInfo sigs) args
234 mkStateProcSm :: (StateId, SignalInfo, SignalInfo) -> AST.ProcSm
235 mkStateProcSm (num, old, new) =
236 AST.ProcSm label [clk] [statement]
238 label = mkVHDLExtId $ "state_" ++ (show num)
239 clk = mkVHDLExtId "clk"
240 rising_edge = AST.NSimple $ mkVHDLBasicId "rising_edge"
241 wform = AST.Wform [AST.WformElem (AST.PrimName $ AST.NSimple $ getSignalId new) Nothing]
242 assign = AST.SigAssign (AST.NSimple $ getSignalId old) wform
243 rising_edge_clk = AST.PrimFCall $ AST.FCall rising_edge [Nothing AST.:=>: (AST.ADName $ AST.NSimple clk)]
244 statement = AST.IfSm rising_edge_clk [assign] [] Nothing
246 mkSigDec :: CoreSyn.CoreBndr -> VHDLState (Maybe AST.SigDec)
248 if True then do --isInternalSigUse use || isStateSigUse use then do
249 type_mark <- vhdl_ty $ Var.varType bndr
250 return $ Just (AST.SigDec (bndrToVHDLId bndr) type_mark Nothing)
254 -- | Creates a VHDL Id from a named SignalInfo. Errors out if the SignalInfo
256 getSignalId :: SignalInfo -> AST.VHDLId
258 mkVHDLExtId $ Maybe.fromMaybe
259 (error $ "Unnamed signal? This should not happen!")
262 -- | Transforms a core binding into a VHDL concurrent statement
264 (CoreSyn.CoreBndr, CoreSyn.CoreExpr) -- ^ The binding to process
265 -> VHDLState [AST.ConcSm] -- ^ The corresponding VHDL component instantiations.
268 -- Ignore Cast expressions, they should not longer have any meaning as long as
269 -- the type works out.
270 mkConcSm (bndr, Cast expr ty) = mkConcSm (bndr, expr)
272 mkConcSm (bndr, app@(CoreSyn.App _ _))= do
273 let (CoreSyn.Var f, args) = CoreSyn.collectArgs app
274 let valargs' = filter isValArg args
275 let valargs = filter (\(CoreSyn.Var bndr) -> not (Id.isDictId bndr)) valargs'
276 case Var.globalIdVarDetails f of
277 IdInfo.DataConWorkId dc ->
278 -- It's a datacon. Create a record from its arguments.
279 -- First, filter out type args. TODO: Is this the best way to do this?
280 -- The types should already have been taken into acocunt when creating
281 -- the signal, so this should probably work...
282 --let valargs = filter isValArg args in
283 if all is_var valargs then do
284 labels <- getFieldLabels (CoreUtils.exprType app)
285 return $ zipWith mkassign labels valargs
287 error $ "VHDL.mkConcSm Not in normal form: One ore more complex arguments: " ++ pprString args
289 mkassign :: AST.VHDLId -> CoreExpr -> AST.ConcSm
290 mkassign label (Var arg) =
291 let sel_name = mkSelectedName bndr label in
292 mkUncondAssign (Right sel_name) (varToVHDLExpr arg)
293 IdInfo.VanillaGlobal -> do
294 -- It's a global value imported from elsewhere. These can be builtin
296 funSignatures <- getA vsNameTable
297 case (Map.lookup (bndrToString f) funSignatures) of
298 Just (arg_count, builder) ->
299 if length valargs == arg_count then
301 sigs = map (varToVHDLExpr.varBndr) valargs
303 src_wform = AST.Wform [AST.WformElem func Nothing]
304 dst_name = AST.NSimple (mkVHDLExtId (bndrToString bndr))
305 assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
307 return [AST.CSSASm assign]
309 error $ "VHDL.mkConcSm Incorrect number of arguments to builtin function: " ++ pprString f ++ " Args: " ++ pprString valargs
310 Nothing -> error $ "Using function from another module that is not a known builtin: " ++ pprString f
311 IdInfo.NotGlobalId -> do
312 signatures <- getA vsSignatures
313 -- This is a local id, so it should be a function whose definition we
314 -- have and which can be turned into a component instantiation.
316 signature = Maybe.fromMaybe
317 (error $ "Using function '" ++ (bndrToString f) ++ "' without signature? This should not happen!")
318 (Map.lookup f signatures)
319 entity_id = ent_id signature
320 label = "comp_ins_" ++ bndrToString bndr
321 -- Add a clk port if we have state
322 --clk_port = Maybe.fromJust $ mkAssocElem (Just $ mkVHDLExtId "clk") "clk"
323 clk_port = Maybe.fromJust $ mkAssocElem (Just $ mkVHDLExtId "clk") "clk"
324 --portmaps = mkAssocElems sigs args res signature ++ (if hasState hsfunc then [clk_port] else [])
325 portmaps = clk_port : mkAssocElems args bndr signature
327 return [AST.CSISm $ AST.CompInsSm (mkVHDLExtId label) (AST.IUEntity (AST.NSimple entity_id)) (AST.PMapAspect portmaps)]
328 details -> error $ "Calling unsupported function " ++ pprString f ++ " with GlobalIdDetails " ++ pprString details
330 -- A single alt case must be a selector. This means thee scrutinee is a simple
331 -- variable, the alternative is a dataalt with a single non-wild binder that
333 mkConcSm (bndr, expr@(Case (Var scrut) b ty [alt])) =
335 (DataAlt dc, bndrs, (Var sel_bndr)) -> do
336 case List.elemIndex sel_bndr bndrs of
338 labels <- getFieldLabels (Id.idType scrut)
339 let label = labels!!i
340 let sel_name = mkSelectedName scrut label
341 let sel_expr = AST.PrimName sel_name
342 return [mkUncondAssign (Left bndr) sel_expr]
343 Nothing -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
345 _ -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
347 -- Multiple case alt are be conditional assignments and have only wild
348 -- binders in the alts and only variables in the case values and a variable
349 -- for a scrutinee. We check the constructor of the second alt, since the
350 -- first is the default case, if there is any.
351 mkConcSm (bndr, (Case (Var scrut) b ty [(_, _, Var false), (con, _, Var true)])) =
353 cond_expr = (varToVHDLExpr scrut) AST.:=: (conToVHDLExpr con)
354 true_expr = (varToVHDLExpr true)
355 false_expr = (varToVHDLExpr false)
357 return [mkCondAssign (Left bndr) cond_expr true_expr false_expr]
358 mkConcSm (_, (Case (Var _) _ _ alts)) = error "VHDL.mkConcSm Not in normal form: Case statement with more than two alternatives"
359 mkConcSm (_, Case _ _ _ _) = error "VHDL.mkConcSm Not in normal form: Case statement has does not have a simple variable as scrutinee"
360 mkConcSm (bndr, expr) = error $ "VHDL.mkConcSM Unsupported binding in let expression: " ++ pprString bndr ++ " = " ++ pprString expr
362 -- Create an unconditional assignment statement
364 Either CoreBndr AST.VHDLName -- ^ The signal to assign to
365 -> AST.Expr -- ^ The expression to assign
366 -> AST.ConcSm -- ^ The resulting concurrent statement
367 mkUncondAssign dst expr = mkAssign dst Nothing expr
369 -- Create a conditional assignment statement
371 Either CoreBndr AST.VHDLName -- ^ The signal to assign to
372 -> AST.Expr -- ^ The condition
373 -> AST.Expr -- ^ The value when true
374 -> AST.Expr -- ^ The value when false
375 -> AST.ConcSm -- ^ The resulting concurrent statement
376 mkCondAssign dst cond true false = mkAssign dst (Just (cond, true)) false
378 -- Create a conditional or unconditional assignment statement
380 Either CoreBndr AST.VHDLName -> -- ^ The signal to assign to
381 Maybe (AST.Expr , AST.Expr) -> -- ^ Optionally, the condition to test for
382 -- and the value to assign when true.
383 AST.Expr -> -- ^ The value to assign when false or no condition
384 AST.ConcSm -- ^ The resulting concurrent statement
386 mkAssign dst cond false_expr =
388 -- I'm not 100% how this assignment AST works, but this gets us what we
390 whenelse = case cond of
391 Just (cond_expr, true_expr) ->
393 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
395 [AST.WhenElse true_wform cond_expr]
397 false_wform = AST.Wform [AST.WformElem false_expr Nothing]
398 dst_name = case dst of
399 Left bndr -> AST.NSimple (bndrToVHDLId bndr)
401 assign = dst_name AST.:<==: (AST.ConWforms whenelse false_wform Nothing)
405 -- Create a record field selector that selects the given label from the record
406 -- stored in the given binder.
407 mkSelectedName :: CoreBndr -> AST.VHDLId -> AST.VHDLName
408 mkSelectedName bndr label =
410 sel_prefix = AST.NSimple $ bndrToVHDLId bndr
411 sel_suffix = AST.SSimple $ label
413 AST.NSelected $ sel_prefix AST.:.: sel_suffix
415 -- Finds the field labels for VHDL type generated for the given Core type,
416 -- which must result in a record type.
417 getFieldLabels :: Type.Type -> VHDLState [AST.VHDLId]
418 getFieldLabels ty = do
419 -- Ensure that the type is generated (but throw away it's VHDLId)
421 -- Get the types map, lookup and unpack the VHDL TypeDef
422 types <- getA vsTypes
423 case Map.lookup (OrdType ty) types of
424 Just (_, Left (AST.TDR (AST.RecordTypeDef elems))) -> return $ map (\(AST.ElementDec id _) -> id) elems
425 _ -> error $ "VHDL.getFieldLabels Type not found or not a record type? This should not happen! Type: " ++ (show ty)
427 -- Turn a variable reference into a AST expression
428 varToVHDLExpr :: Var.Var -> AST.Expr
429 varToVHDLExpr var = AST.PrimName $ AST.NSimple $ bndrToVHDLId var
431 -- Turn a constructor into an AST expression. For dataconstructors, this is
432 -- only the constructor itself, not any arguments it has. Should not be called
433 -- with a DEFAULT constructor.
434 conToVHDLExpr :: CoreSyn.AltCon -> AST.Expr
435 conToVHDLExpr (DataAlt dc) = AST.PrimLit lit
437 tycon = DataCon.dataConTyCon dc
438 tyname = TyCon.tyConName tycon
439 dcname = DataCon.dataConName dc
440 lit = case Name.getOccString tyname of
441 -- TODO: Do something more robust than string matching
442 "Bit" -> case Name.getOccString dcname of "High" -> "'1'"; "Low" -> "'0'"
443 "Bool" -> case Name.getOccString dcname of "True" -> "true"; "False" -> "false"
444 conToVHDLExpr (LitAlt _) = error "VHDL.conToVHDLExpr Literals not support in case alternatives yet"
445 conToVHDLExpr DEFAULT = error "VHDL.conToVHDLExpr DEFAULT alternative should not occur here!"
450 mkConcSm sigs (UncondDef src dst) _ = do
451 src_expr <- vhdl_expr src
452 let src_wform = AST.Wform [AST.WformElem src_expr Nothing]
453 let dst_name = AST.NSimple (getSignalId $ signalInfo sigs dst)
454 let assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
455 return $ AST.CSSASm assign
457 vhdl_expr (Left id) = return $ mkIdExpr sigs id
458 vhdl_expr (Right expr) =
461 return $ (mkIdExpr sigs id) AST.:=: (AST.PrimLit lit)
462 (Literal lit Nothing) ->
463 return $ AST.PrimLit lit
464 (Literal lit (Just ty)) -> do
465 -- Create a cast expression, which is just a function call using the
466 -- type name as the function name.
467 let litexpr = AST.PrimLit lit
469 let ty_name = AST.NSimple ty_id
470 let args = [Nothing AST.:=>: (AST.ADExpr litexpr)]
471 return $ AST.PrimFCall $ AST.FCall ty_name args
473 return $ (mkIdExpr sigs a) AST.:=: (mkIdExpr sigs b)
475 mkConcSm sigs (CondDef cond true false dst) _ =
477 cond_expr = mkIdExpr sigs cond
478 true_expr = mkIdExpr sigs true
479 false_expr = mkIdExpr sigs false
480 false_wform = AST.Wform [AST.WformElem false_expr Nothing]
481 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
482 whenelse = AST.WhenElse true_wform cond_expr
483 dst_name = AST.NSimple (getSignalId $ signalInfo sigs dst)
484 assign = dst_name AST.:<==: (AST.ConWforms [whenelse] false_wform Nothing)
486 return $ AST.CSSASm assign
488 -- | Turn a SignalId into a VHDL Expr
489 mkIdExpr :: [(SignalId, SignalInfo)] -> SignalId -> AST.Expr
491 let src_name = AST.NSimple (getSignalId $ signalInfo sigs id) in
492 AST.PrimName src_name
495 [CoreSyn.CoreExpr] -- | The argument that are applied to function
496 -> CoreSyn.CoreBndr -- | The binder in which to store the result
497 -> Entity -- | The entity to map against.
498 -> [AST.AssocElem] -- | The resulting port maps
500 mkAssocElems args res entity =
501 -- Create the actual AssocElems
502 Maybe.catMaybes $ zipWith mkAssocElem ports sigs
504 -- Turn the ports and signals from a map into a flat list. This works,
505 -- since the maps must have an identical form by definition. TODO: Check
507 arg_ports = ent_args entity
508 res_port = ent_res entity
509 -- Extract the id part from the (id, type) tuple
510 ports = map (Monad.liftM fst) (res_port : arg_ports)
511 -- Translate signal numbers into names
512 sigs = (bndrToString res : map (bndrToString.varBndr) args)
514 -- Turns a Var CoreExpr into the Id inside it. Will of course only work for
515 -- simple Var CoreExprs, not complexer ones.
516 varBndr :: CoreSyn.CoreExpr -> Var.Id
517 varBndr (CoreSyn.Var id) = id
519 -- | Look up a signal in the signal name map
520 lookupSigName :: [(SignalId, SignalInfo)] -> SignalId -> String
521 lookupSigName sigs sig = name
523 info = Maybe.fromMaybe
524 (error $ "Unknown signal " ++ (show sig) ++ " used? This should not happen!")
526 name = Maybe.fromMaybe
527 (error $ "Unnamed signal " ++ (show sig) ++ " used? This should not happen!")
530 -- | Create an VHDL port -> signal association
531 mkAssocElem :: Maybe AST.VHDLId -> String -> Maybe AST.AssocElem
532 mkAssocElem (Just port) signal = Just $ Just port AST.:=>: (AST.ADName (AST.NSimple (mkVHDLExtId signal)))
533 mkAssocElem Nothing _ = Nothing
535 -- | The VHDL Bit type
536 bit_ty :: AST.TypeMark
537 bit_ty = AST.unsafeVHDLBasicId "Bit"
539 -- | The VHDL Boolean type
540 bool_ty :: AST.TypeMark
541 bool_ty = AST.unsafeVHDLBasicId "Boolean"
543 -- | The VHDL std_logic
544 std_logic_ty :: AST.TypeMark
545 std_logic_ty = AST.unsafeVHDLBasicId "std_logic"
547 -- Translate a Haskell type to a VHDL type
548 vhdl_ty :: Type.Type -> VHDLState AST.TypeMark
550 typemap <- getA vsTypes
551 let builtin_ty = do -- See if this is a tycon and lookup its name
552 (tycon, args) <- Type.splitTyConApp_maybe ty
553 let name = Name.getOccString (TyCon.tyConName tycon)
554 Map.lookup name builtin_types
555 -- If not a builtin type, try the custom types
556 let existing_ty = (fmap fst) $ Map.lookup (OrdType ty) typemap
557 case Monoid.getFirst $ Monoid.mconcat (map Monoid.First [builtin_ty, existing_ty]) of
558 -- Found a type, return it
560 -- No type yet, try to construct it
562 newty_maybe <- (construct_vhdl_ty ty)
564 Just (ty_id, ty_def) -> do
565 -- TODO: Check name uniqueness
566 modA vsTypes (Map.insert (OrdType ty) (ty_id, ty_def))
568 Nothing -> error $ "Unsupported Haskell type: " ++ (showSDoc $ ppr ty)
570 -- Construct a new VHDL type for the given Haskell type.
571 construct_vhdl_ty :: Type.Type -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
572 construct_vhdl_ty ty = do
573 case Type.splitTyConApp_maybe ty of
574 Just (tycon, args) -> do
575 let name = Name.getOccString (TyCon.tyConName tycon)
578 res <- mk_vector_ty (tfvec_len ty) (tfvec_elem ty)
579 return $ Just $ (Arrow.second Right) res
581 -- res <- mk_vector_ty (sized_word_len ty) ty
582 -- return $ Just $ (Arrow.second Left) res
584 res <- mk_natural_ty 0 (ranged_word_bound ty)
585 return $ Just $ (Arrow.second Right) res
586 -- Create a custom type from this tycon
587 otherwise -> mk_tycon_ty tycon args
588 Nothing -> return $ Nothing
590 -- | Create VHDL type for a custom tycon
591 mk_tycon_ty :: TyCon.TyCon -> [Type.Type] -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
592 mk_tycon_ty tycon args =
593 case TyCon.tyConDataCons tycon of
594 -- Not an algebraic type
595 [] -> error $ "Only custom algebraic types are supported: " ++ (showSDoc $ ppr tycon)
597 let arg_tys = DataCon.dataConRepArgTys dc
598 -- TODO: CoreSubst docs say each Subs can be applied only once. Is this a
599 -- violation? Or does it only mean not to apply it again to the same
601 let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
602 elem_tys <- mapM vhdl_ty real_arg_tys
603 let elems = zipWith AST.ElementDec recordlabels elem_tys
604 -- For a single construct datatype, build a record with one field for
606 -- TODO: Add argument type ids to this, to ensure uniqueness
607 -- TODO: Special handling for tuples?
608 let ty_id = mkVHDLExtId $ nameToString (TyCon.tyConName tycon)
609 let ty_def = AST.TDR $ AST.RecordTypeDef elems
610 return $ Just (ty_id, Left ty_def)
611 dcs -> error $ "Only single constructor datatypes supported: " ++ (showSDoc $ ppr tycon)
613 -- Create a subst that instantiates all types passed to the tycon
614 -- TODO: I'm not 100% sure that this is the right way to do this. It seems
615 -- to work so far, though..
616 tyvars = TyCon.tyConTyVars tycon
617 subst = CoreSubst.extendTvSubstList CoreSubst.emptySubst (zip tyvars args)
619 -- | Create a VHDL vector type
621 Int -- ^ The length of the vector
622 -> Type.Type -- ^ The Haskell element type of the Vector
623 -> VHDLState (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
625 mk_vector_ty len el_ty = do
626 elem_types_map <- getA vsElemTypes
627 el_ty_tm <- vhdl_ty el_ty
628 let ty_id = mkVHDLExtId $ "vector-"++ (AST.fromVHDLId el_ty_tm) ++ "-0_to_" ++ (show len)
629 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len - 1))]
630 let existing_elem_ty = (fmap fst) $ Map.lookup (OrdType el_ty) elem_types_map
631 case existing_elem_ty of
633 let ty_def = AST.SubtypeIn t (Just range)
634 return (ty_id, ty_def)
636 let vec_id = mkVHDLExtId $ "vector_" ++ (AST.fromVHDLId el_ty_tm)
637 let vec_def = AST.TDA $ AST.UnconsArrayDef [tfvec_indexTM] el_ty_tm
638 modA vsElemTypes (Map.insert (OrdType el_ty) (vec_id, vec_def))
639 modA vsTypeFuns (Map.insert (OrdType el_ty) (genUnconsVectorFuns el_ty_tm vec_id))
640 let ty_def = AST.SubtypeIn vec_id (Just range)
641 return (ty_id, ty_def)
644 Int -- ^ The minimum bound (> 0)
645 -> Int -- ^ The maximum bound (> minimum bound)
646 -> VHDLState (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
647 mk_natural_ty min_bound max_bound = do
648 let ty_id = mkVHDLExtId $ "nat_" ++ (show min_bound) ++ "_to_" ++ (show max_bound)
649 let range = AST.ConstraintRange $ AST.SubTypeRange (AST.PrimLit $ (show min_bound)) (AST.PrimLit $ (show max_bound))
650 let ty_def = AST.SubtypeIn naturalTM (Just range)
651 return (ty_id, ty_def)
655 ("Bit", std_logic_ty),
656 ("Bool", bool_ty) -- TysWiredIn.boolTy
660 -- Can only contain alphanumerics and underscores. The supplied string must be
661 -- a valid basic id, otherwise an error value is returned. This function is
662 -- not meant to be passed identifiers from a source file, use mkVHDLExtId for
664 mkVHDLBasicId :: String -> AST.VHDLId
666 AST.unsafeVHDLBasicId $ (strip_multiscore . strip_leading . strip_invalid) s
668 -- Strip invalid characters.
669 strip_invalid = filter (`elem` ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ "_.")
670 -- Strip leading numbers and underscores
671 strip_leading = dropWhile (`elem` ['0'..'9'] ++ "_")
672 -- Strip multiple adjacent underscores
673 strip_multiscore = concat . map (\cs ->
679 -- Shortcut for Extended VHDL Id's. These Id's can contain a lot more
680 -- different characters than basic ids, but can never be used to refer to
682 -- Use extended Ids for any values that are taken from the source file.
683 mkVHDLExtId :: String -> AST.VHDLId
685 AST.unsafeVHDLExtId $ strip_invalid s
687 -- Allowed characters, taken from ForSyde's mkVHDLExtId
688 allowed = ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ " \"#&\\'()*+,./:;<=>_|!$%@?[]^`{}~-"
689 strip_invalid = filter (`elem` allowed)
691 -- Creates a VHDL Id from a binder
696 bndrToVHDLId = mkVHDLExtId . OccName.occNameString . Name.nameOccName . Var.varName
698 -- Extracts the binder name as a String
702 bndrToString = OccName.occNameString . Name.nameOccName . Var.varName
704 -- Get the string version a Var's unique
705 varToStringUniq = show . Var.varUnique
707 -- Extracts the string version of the name
708 nameToString :: Name.Name -> String
709 nameToString = OccName.occNameString . Name.nameOccName
711 recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
713 -- | Map a port specification of a builtin function to a VHDL Signal to put in
715 toVHDLSignalMapElement :: (String, AST.TypeMark) -> VHDLSignalMapElement
716 toVHDLSignalMapElement (name, ty) = Just (mkVHDLBasicId name, ty)