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))
67 AST.Library $ mkVHDLBasicId "IEEE",
68 mkUseAll ["IEEE", "std_logic_1164"],
69 mkUseAll ["IEEE", "numeric_std"]
72 mkUseAll ["work", "types"]
74 type_package_dec = AST.LUPackageDec $ AST.PackageDec (mkVHDLBasicId "types") (vec_decls ++ ty_decls ++ subProgSpecs)
75 type_package_body = AST.LUPackageBody $ AST.PackageBody typesId (concat tyfun_decls)
76 subProgSpecs = concat (map subProgSpec tyfun_decls)
77 subProgSpec = map (\(AST.SubProgBody spec _ _) -> AST.PDISS spec)
78 mktydecl :: (AST.VHDLId, Either AST.TypeDef AST.SubtypeIn) -> AST.PackageDecItem
79 mktydecl (ty_id, Left ty_def) = AST.PDITD $ AST.TypeDec ty_id ty_def
80 mktydecl (ty_id, Right ty_def) = AST.PDISD $ AST.SubtypeDec ty_id ty_def
82 -- Create a use foo.bar.all statement. Takes a list of components in the used
83 -- name. Must contain at least two components
84 mkUseAll :: [String] -> AST.ContextItem
86 AST.Use $ from AST.:.: AST.All
88 base_prefix = (AST.NSimple $ mkVHDLBasicId $ head ss)
89 from = foldl select base_prefix (tail ss)
90 select prefix s = AST.NSelected $ prefix AST.:.: (AST.SSimple $ mkVHDLBasicId s)
93 [(CoreSyn.CoreBndr, CoreSyn.CoreExpr)]
94 -> VHDLState [(AST.VHDLId, [AST.LibraryUnit])]
96 createLibraryUnits binds = do
97 entities <- Monad.mapM createEntity binds
98 archs <- Monad.mapM createArchitecture binds
101 let AST.EntityDec id _ = ent in
102 (id, [AST.LUEntity ent, AST.LUArch arch])
106 -- | Create an entity for a given function
108 (CoreSyn.CoreBndr, CoreSyn.CoreExpr) -- | The function
109 -> VHDLState AST.EntityDec -- | The resulting entity
111 createEntity (fname, expr) = do
112 -- Strip off lambda's, these will be arguments
113 let (args, letexpr) = CoreSyn.collectBinders expr
114 args' <- Monad.mapM mkMap args
115 -- There must be a let at top level
116 let (CoreSyn.Let binds (CoreSyn.Var res)) = letexpr
118 let vhdl_id = mkVHDLBasicId $ bndrToString fname ++ "_" ++ varToStringUniq fname
119 let ent_decl' = createEntityAST vhdl_id args' res'
120 let AST.EntityDec entity_id _ = ent_decl'
121 let signature = Entity entity_id args' res'
122 modA vsSignatures (Map.insert fname signature)
126 --[(SignalId, SignalInfo)]
128 -> VHDLState VHDLSignalMapElement
129 -- We only need the vsTypes element from the state
132 --info = Maybe.fromMaybe
133 -- (error $ "Signal not found in the name map? This should not happen!")
134 -- (lookup id sigmap)
135 -- Assume the bndr has a valid VHDL id already
136 id = bndrToVHDLId bndr
137 ty = Var.varType bndr
139 if True -- isPortSigUse $ sigUse info
141 type_mark <- vhdl_ty ty
142 return $ Just (id, type_mark)
147 -- | Create the VHDL AST for an entity
149 AST.VHDLId -- | The name of the function
150 -> [VHDLSignalMapElement] -- | The entity's arguments
151 -> VHDLSignalMapElement -- | The entity's result
152 -> AST.EntityDec -- | The entity with the ent_decl filled in as well
154 createEntityAST vhdl_id args res =
155 AST.EntityDec vhdl_id ports
157 -- Create a basic Id, since VHDL doesn't grok filenames with extended Ids.
158 ports = Maybe.catMaybes $
159 map (mkIfaceSigDec AST.In) args
160 ++ [mkIfaceSigDec AST.Out res]
162 -- Add a clk port if we have state
163 clk_port = if True -- hasState hsfunc
165 Just $ AST.IfaceSigDec (mkVHDLExtId "clk") AST.In VHDL.std_logic_ty
169 -- | Create a port declaration
171 AST.Mode -- | The mode for the port (In / Out)
172 -> Maybe (AST.VHDLId, AST.TypeMark) -- | The id and type for the port
173 -> Maybe AST.IfaceSigDec -- | The resulting port declaration
175 mkIfaceSigDec mode (Just (id, ty)) = Just $ AST.IfaceSigDec id mode ty
176 mkIfaceSigDec _ Nothing = Nothing
178 -- | Generate a VHDL entity name for the given hsfunc
180 -- TODO: This doesn't work for functions with multiple signatures!
181 -- Use a Basic Id, since using extended id's for entities throws off
182 -- precision and causes problems when generating filenames.
183 mkVHDLBasicId $ hsFuncName hsfunc
185 -- | Create an architecture for a given function
186 createArchitecture ::
187 (CoreSyn.CoreBndr, CoreSyn.CoreExpr) -- ^ The function
188 -> VHDLState AST.ArchBody -- ^ The architecture for this function
190 createArchitecture (fname, expr) = do
191 signaturemap <- getA vsSignatures
192 let signature = Maybe.fromMaybe
193 (error $ "Generating architecture for function " ++ (pprString fname) ++ "without signature? This should not happen!")
194 (Map.lookup fname signaturemap)
195 let entity_id = ent_id signature
196 -- Strip off lambda's, these will be arguments
197 let (args, letexpr) = CoreSyn.collectBinders expr
198 -- There must be a let at top level
199 let (CoreSyn.Let (CoreSyn.Rec binds) (Var res)) = letexpr
201 -- Create signal declarations for all binders in the let expression, except
202 -- for the output port (that will already have an output port declared in
204 sig_dec_maybes <- mapM (mkSigDec' . fst) (filter ((/=res).fst) binds)
205 let sig_decs = Maybe.catMaybes $ sig_dec_maybes
207 statements <- Monad.mapM mkConcSm binds
208 return $ AST.ArchBody (mkVHDLBasicId "structural") (AST.NSimple entity_id) (map AST.BDISD sig_decs) (statements ++ procs')
210 procs = map mkStateProcSm [] -- (makeStatePairs flatfunc)
211 procs' = map AST.CSPSm procs
212 -- mkSigDec only uses vsTypes from the state
215 -- | Looks up all pairs of old state, new state signals, together with
216 -- the state id they represent.
217 makeStatePairs :: FlatFunction -> [(StateId, SignalInfo, SignalInfo)]
218 makeStatePairs flatfunc =
219 [(Maybe.fromJust $ oldStateId $ sigUse old_info, old_info, new_info)
220 | old_info <- map snd (flat_sigs flatfunc)
221 , new_info <- map snd (flat_sigs flatfunc)
222 -- old_info must be an old state (and, because of the next equality,
223 -- new_info must be a new state).
224 , Maybe.isJust $ oldStateId $ sigUse old_info
225 -- And the state numbers must match
226 , (oldStateId $ sigUse old_info) == (newStateId $ sigUse new_info)]
228 -- Replace the second tuple element with the corresponding SignalInfo
229 --args_states = map (Arrow.second $ signalInfo sigs) args
230 mkStateProcSm :: (StateId, SignalInfo, SignalInfo) -> AST.ProcSm
231 mkStateProcSm (num, old, new) =
232 AST.ProcSm label [clk] [statement]
234 label = mkVHDLExtId $ "state_" ++ (show num)
235 clk = mkVHDLExtId "clk"
236 rising_edge = AST.NSimple $ mkVHDLBasicId "rising_edge"
237 wform = AST.Wform [AST.WformElem (AST.PrimName $ AST.NSimple $ getSignalId new) Nothing]
238 assign = AST.SigAssign (AST.NSimple $ getSignalId old) wform
239 rising_edge_clk = AST.PrimFCall $ AST.FCall rising_edge [Nothing AST.:=>: (AST.ADName $ AST.NSimple clk)]
240 statement = AST.IfSm rising_edge_clk [assign] [] Nothing
242 mkSigDec :: CoreSyn.CoreBndr -> VHDLState (Maybe AST.SigDec)
244 if True then do --isInternalSigUse use || isStateSigUse use then do
245 type_mark <- vhdl_ty $ Var.varType bndr
246 return $ Just (AST.SigDec (bndrToVHDLId bndr) type_mark Nothing)
250 -- | Creates a VHDL Id from a named SignalInfo. Errors out if the SignalInfo
252 getSignalId :: SignalInfo -> AST.VHDLId
254 mkVHDLExtId $ Maybe.fromMaybe
255 (error $ "Unnamed signal? This should not happen!")
258 -- | Transforms a core binding into a VHDL concurrent statement
260 (CoreSyn.CoreBndr, CoreSyn.CoreExpr) -- ^ The binding to process
261 -> VHDLState AST.ConcSm -- ^ The corresponding VHDL component instantiation.
263 mkConcSm (bndr, app@(CoreSyn.App _ _))= do
264 let (CoreSyn.Var f, args) = CoreSyn.collectArgs app
265 let valargs' = filter isValArg args
266 let valargs = filter (\(CoreSyn.Var bndr) -> not (Id.isDictId bndr)) valargs'
267 case Var.globalIdVarDetails f of
268 IdInfo.DataConWorkId dc ->
269 -- It's a datacon. Create a record from its arguments.
270 -- First, filter out type args. TODO: Is this the best way to do this?
271 -- The types should already have been taken into acocunt when creating
272 -- the signal, so this should probably work...
273 --let valargs = filter isValArg args in
274 if all is_var valargs then do
275 labels <- getFieldLabels (CoreUtils.exprType app)
276 let assigns = zipWith mkassign labels valargs
277 let block_id = bndrToVHDLId bndr
278 let block = AST.BlockSm block_id [] (AST.PMapAspect []) [] assigns
279 return $ AST.CSBSm block
281 error $ "VHDL.mkConcSm Not in normal form: One ore more complex arguments: " ++ pprString args
283 mkassign :: AST.VHDLId -> CoreExpr -> AST.ConcSm
284 mkassign label (Var arg) =
285 let sel_name = mkSelectedName bndr label in
286 mkUncondAssign (Right sel_name) (varToVHDLExpr arg)
287 IdInfo.VanillaGlobal -> do
288 -- It's a global value imported from elsewhere. These can be builtin
290 funSignatures <- getA vsNameTable
291 case (Map.lookup (bndrToString f) funSignatures) of
292 Just (arg_count, builder) ->
293 if length valargs == arg_count then
295 sigs = map (bndrToString.varBndr) valargs
296 sigsNames = map (\signal -> (AST.PrimName (AST.NSimple (mkVHDLExtId signal)))) sigs
297 func = builder sigsNames
298 src_wform = AST.Wform [AST.WformElem func Nothing]
299 dst_name = AST.NSimple (mkVHDLExtId (bndrToString bndr))
300 assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
302 return $ AST.CSSASm assign
304 error $ "VHDL.mkConcSm Incorrect number of arguments to builtin function: " ++ pprString f ++ " Args: " ++ pprString valargs
305 Nothing -> error $ "Using function from another module that is not a known builtin: " ++ pprString f
306 IdInfo.NotGlobalId -> do
307 signatures <- getA vsSignatures
308 -- This is a local id, so it should be a function whose definition we
309 -- have and which can be turned into a component instantiation.
311 signature = Maybe.fromMaybe
312 (error $ "Using function '" ++ (bndrToString f) ++ "' without signature? This should not happen!")
313 (Map.lookup f signatures)
314 entity_id = ent_id signature
315 label = bndrToString bndr
316 -- Add a clk port if we have state
317 --clk_port = Maybe.fromJust $ mkAssocElem (Just $ mkVHDLExtId "clk") "clk"
318 --portmaps = mkAssocElems sigs args res signature ++ (if hasState hsfunc then [clk_port] else [])
319 portmaps = mkAssocElems args bndr signature
321 return $ AST.CSISm $ AST.CompInsSm (mkVHDLExtId label) (AST.IUEntity (AST.NSimple entity_id)) (AST.PMapAspect portmaps)
322 details -> error $ "Calling unsupported function " ++ pprString f ++ " with GlobalIdDetails " ++ pprString details
324 -- GHC generates some funny "r = r" bindings in let statements before
325 -- simplification. This outputs some dummy ConcSM for these, so things will at
326 -- least compile for now.
327 mkConcSm (bndr, CoreSyn.Var _) = return $ AST.CSPSm $ AST.ProcSm (mkVHDLBasicId "unused") [] []
329 -- A single alt case must be a selector. This means thee scrutinee is a simple
330 -- variable, the alternative is a dataalt with a single non-wild binder that
332 mkConcSm (bndr, expr@(Case (Var scrut) b ty [alt])) =
334 (DataAlt dc, bndrs, (Var sel_bndr)) -> do
335 case List.elemIndex sel_bndr bndrs of
337 labels <- getFieldLabels (Id.idType scrut)
338 let label = labels!!i
339 let sel_name = mkSelectedName scrut label
340 let sel_expr = AST.PrimName sel_name
341 return $ mkUncondAssign (Left bndr) sel_expr
342 Nothing -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
344 _ -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
346 -- Multiple case alt are be conditional assignments and have only wild
347 -- binders in the alts and only variables in the case values and a variable
348 -- for a scrutinee. We check the constructor of the second alt, since the
349 -- first is the default case, if there is any.
350 mkConcSm (bndr, (Case (Var scrut) b ty [(_, _, Var false), (con, _, Var true)])) =
352 cond_expr = (varToVHDLExpr scrut) AST.:=: (conToVHDLExpr con)
353 true_expr = (varToVHDLExpr true)
354 false_expr = (varToVHDLExpr false)
356 return $ mkCondAssign (Left bndr) cond_expr true_expr false_expr
357 mkConcSm (_, (Case (Var _) _ _ alts)) = error "VHDL.mkConcSm Not in normal form: Case statement with more than two alternatives"
358 mkConcSm (_, Case _ _ _ _) = error "VHDL.mkConcSm Not in normal form: Case statement has does not have a simple variable as scrutinee"
359 mkConcSm (bndr, expr) = error $ "VHDL.mkConcSM Unsupported binding in let expression: " ++ pprString bndr ++ " = " ++ pprString expr
361 -- Create an unconditional assignment statement
363 Either CoreBndr AST.VHDLName -- ^ The signal to assign to
364 -> AST.Expr -- ^ The expression to assign
365 -> AST.ConcSm -- ^ The resulting concurrent statement
366 mkUncondAssign dst expr = mkAssign dst Nothing expr
368 -- Create a conditional assignment statement
370 Either CoreBndr AST.VHDLName -- ^ The signal to assign to
371 -> AST.Expr -- ^ The condition
372 -> AST.Expr -- ^ The value when true
373 -> AST.Expr -- ^ The value when false
374 -> AST.ConcSm -- ^ The resulting concurrent statement
375 mkCondAssign dst cond true false = mkAssign dst (Just (cond, true)) false
377 -- Create a conditional or unconditional assignment statement
379 Either CoreBndr AST.VHDLName -> -- ^ The signal to assign to
380 Maybe (AST.Expr , AST.Expr) -> -- ^ Optionally, the condition to test for
381 -- and the value to assign when true.
382 AST.Expr -> -- ^ The value to assign when false or no condition
383 AST.ConcSm -- ^ The resulting concurrent statement
385 mkAssign dst cond false_expr =
387 -- I'm not 100% how this assignment AST works, but this gets us what we
389 whenelse = case cond of
390 Just (cond_expr, true_expr) ->
392 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
394 [AST.WhenElse true_wform cond_expr]
396 false_wform = AST.Wform [AST.WformElem false_expr Nothing]
397 dst_name = case dst of
398 Left bndr -> AST.NSimple (bndrToVHDLId bndr)
400 assign = dst_name AST.:<==: (AST.ConWforms whenelse false_wform Nothing)
404 -- Create a record field selector that selects the given label from the record
405 -- stored in the given binder.
406 mkSelectedName :: CoreBndr -> AST.VHDLId -> AST.VHDLName
407 mkSelectedName bndr label =
409 sel_prefix = AST.NSimple $ bndrToVHDLId bndr
410 sel_suffix = AST.SSimple $ label
412 AST.NSelected $ sel_prefix AST.:.: sel_suffix
414 -- Finds the field labels for VHDL type generated for the given Core type,
415 -- which must result in a record type.
416 getFieldLabels :: Type.Type -> VHDLState [AST.VHDLId]
417 getFieldLabels ty = do
418 -- Ensure that the type is generated (but throw away it's VHDLId)
420 -- Get the types map, lookup and unpack the VHDL TypeDef
421 types <- getA vsTypes
422 case Map.lookup (OrdType ty) types of
423 Just (_, Left (AST.TDR (AST.RecordTypeDef elems))) -> return $ map (\(AST.ElementDec id _) -> id) elems
424 _ -> error $ "VHDL.getFieldLabels Type not found or not a record type? This should not happen! Type: " ++ (show ty)
426 -- Turn a variable reference into a AST expression
427 varToVHDLExpr :: Var.Var -> AST.Expr
428 varToVHDLExpr var = AST.PrimName $ AST.NSimple $ bndrToVHDLId var
430 -- Turn a constructor into an AST expression. For dataconstructors, this is
431 -- only the constructor itself, not any arguments it has. Should not be called
432 -- with a DEFAULT constructor.
433 conToVHDLExpr :: CoreSyn.AltCon -> AST.Expr
434 conToVHDLExpr (DataAlt dc) = AST.PrimLit lit
436 tycon = DataCon.dataConTyCon dc
437 tyname = TyCon.tyConName tycon
438 dcname = DataCon.dataConName dc
439 lit = case Name.getOccString tyname of
440 -- TODO: Do something more robust than string matching
441 "Bit" -> case Name.getOccString dcname of "High" -> "'1'"; "Low" -> "'0'"
442 "Bool" -> case Name.getOccString dcname of "True" -> "true"; "False" -> "false"
443 conToVHDLExpr (LitAlt _) = error "VHDL.conToVHDLExpr Literals not support in case alternatives yet"
444 conToVHDLExpr DEFAULT = error "VHDL.conToVHDLExpr DEFAULT alternative should not occur here!"
449 mkConcSm sigs (UncondDef src dst) _ = do
450 src_expr <- vhdl_expr src
451 let src_wform = AST.Wform [AST.WformElem src_expr Nothing]
452 let dst_name = AST.NSimple (getSignalId $ signalInfo sigs dst)
453 let assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
454 return $ AST.CSSASm assign
456 vhdl_expr (Left id) = return $ mkIdExpr sigs id
457 vhdl_expr (Right expr) =
460 return $ (mkIdExpr sigs id) AST.:=: (AST.PrimLit lit)
461 (Literal lit Nothing) ->
462 return $ AST.PrimLit lit
463 (Literal lit (Just ty)) -> do
464 -- Create a cast expression, which is just a function call using the
465 -- type name as the function name.
466 let litexpr = AST.PrimLit lit
468 let ty_name = AST.NSimple ty_id
469 let args = [Nothing AST.:=>: (AST.ADExpr litexpr)]
470 return $ AST.PrimFCall $ AST.FCall ty_name args
472 return $ (mkIdExpr sigs a) AST.:=: (mkIdExpr sigs b)
474 mkConcSm sigs (CondDef cond true false dst) _ =
476 cond_expr = mkIdExpr sigs cond
477 true_expr = mkIdExpr sigs true
478 false_expr = mkIdExpr sigs false
479 false_wform = AST.Wform [AST.WformElem false_expr Nothing]
480 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
481 whenelse = AST.WhenElse true_wform cond_expr
482 dst_name = AST.NSimple (getSignalId $ signalInfo sigs dst)
483 assign = dst_name AST.:<==: (AST.ConWforms [whenelse] false_wform Nothing)
485 return $ AST.CSSASm assign
487 -- | Turn a SignalId into a VHDL Expr
488 mkIdExpr :: [(SignalId, SignalInfo)] -> SignalId -> AST.Expr
490 let src_name = AST.NSimple (getSignalId $ signalInfo sigs id) in
491 AST.PrimName src_name
494 [CoreSyn.CoreExpr] -- | The argument that are applied to function
495 -> CoreSyn.CoreBndr -- | The binder in which to store the result
496 -> Entity -- | The entity to map against.
497 -> [AST.AssocElem] -- | The resulting port maps
499 mkAssocElems args res entity =
500 -- Create the actual AssocElems
501 Maybe.catMaybes $ zipWith mkAssocElem ports sigs
503 -- Turn the ports and signals from a map into a flat list. This works,
504 -- since the maps must have an identical form by definition. TODO: Check
506 arg_ports = ent_args entity
507 res_port = ent_res entity
508 -- Extract the id part from the (id, type) tuple
509 ports = map (Monad.liftM fst) (res_port : arg_ports)
510 -- Translate signal numbers into names
511 sigs = (bndrToString res : map (bndrToString.varBndr) args)
513 -- Turns a Var CoreExpr into the Id inside it. Will of course only work for
514 -- simple Var CoreExprs, not complexer ones.
515 varBndr :: CoreSyn.CoreExpr -> Var.Id
516 varBndr (CoreSyn.Var id) = id
518 -- | Look up a signal in the signal name map
519 lookupSigName :: [(SignalId, SignalInfo)] -> SignalId -> String
520 lookupSigName sigs sig = name
522 info = Maybe.fromMaybe
523 (error $ "Unknown signal " ++ (show sig) ++ " used? This should not happen!")
525 name = Maybe.fromMaybe
526 (error $ "Unnamed signal " ++ (show sig) ++ " used? This should not happen!")
529 -- | Create an VHDL port -> signal association
530 mkAssocElem :: Maybe AST.VHDLId -> String -> Maybe AST.AssocElem
531 mkAssocElem (Just port) signal = Just $ Just port AST.:=>: (AST.ADName (AST.NSimple (mkVHDLExtId signal)))
532 mkAssocElem Nothing _ = Nothing
534 -- | The VHDL Bit type
535 bit_ty :: AST.TypeMark
536 bit_ty = AST.unsafeVHDLBasicId "Bit"
538 -- | The VHDL Boolean type
539 bool_ty :: AST.TypeMark
540 bool_ty = AST.unsafeVHDLBasicId "Boolean"
542 -- | The VHDL std_logic
543 std_logic_ty :: AST.TypeMark
544 std_logic_ty = AST.unsafeVHDLBasicId "std_logic"
546 -- Translate a Haskell type to a VHDL type
547 vhdl_ty :: Type.Type -> VHDLState AST.TypeMark
549 typemap <- getA vsTypes
550 let builtin_ty = do -- See if this is a tycon and lookup its name
551 (tycon, args) <- Type.splitTyConApp_maybe ty
552 let name = Name.getOccString (TyCon.tyConName tycon)
553 Map.lookup name builtin_types
554 -- If not a builtin type, try the custom types
555 let existing_ty = (fmap fst) $ Map.lookup (OrdType ty) typemap
556 case Monoid.getFirst $ Monoid.mconcat (map Monoid.First [builtin_ty, existing_ty]) of
557 -- Found a type, return it
559 -- No type yet, try to construct it
561 newty_maybe <- (construct_vhdl_ty ty)
563 Just (ty_id, ty_def) -> do
564 -- TODO: Check name uniqueness
565 modA vsTypes (Map.insert (OrdType ty) (ty_id, ty_def))
567 Nothing -> error $ "Unsupported Haskell type: " ++ (showSDoc $ ppr ty)
569 -- Construct a new VHDL type for the given Haskell type.
570 construct_vhdl_ty :: Type.Type -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
571 construct_vhdl_ty ty = do
572 case Type.splitTyConApp_maybe ty of
573 Just (tycon, args) -> do
574 let name = Name.getOccString (TyCon.tyConName tycon)
577 res <- mk_vector_ty (tfvec_len ty) (tfvec_elem ty) ty
578 return $ Just $ (Arrow.second Right) res
580 -- res <- mk_vector_ty (sized_word_len ty) ty
581 -- return $ Just $ (Arrow.second Left) res
583 res <- mk_natural_ty 0 (ranged_word_bound ty) ty
584 return $ Just $ (Arrow.second Right) res
585 -- Create a custom type from this tycon
586 otherwise -> mk_tycon_ty tycon args
587 Nothing -> return $ Nothing
589 -- | Create VHDL type for a custom tycon
590 mk_tycon_ty :: TyCon.TyCon -> [Type.Type] -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
591 mk_tycon_ty tycon args =
592 case TyCon.tyConDataCons tycon of
593 -- Not an algebraic type
594 [] -> error $ "Only custom algebraic types are supported: " ++ (showSDoc $ ppr tycon)
596 let arg_tys = DataCon.dataConRepArgTys dc
597 -- TODO: CoreSubst docs say each Subs can be applied only once. Is this a
598 -- violation? Or does it only mean not to apply it again to the same
600 let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
601 elem_tys <- mapM vhdl_ty real_arg_tys
602 let elems = zipWith AST.ElementDec recordlabels elem_tys
603 -- For a single construct datatype, build a record with one field for
605 -- TODO: Add argument type ids to this, to ensure uniqueness
606 -- TODO: Special handling for tuples?
607 let ty_id = mkVHDLExtId $ nameToString (TyCon.tyConName tycon)
608 let ty_def = AST.TDR $ AST.RecordTypeDef elems
609 return $ Just (ty_id, Left ty_def)
610 dcs -> error $ "Only single constructor datatypes supported: " ++ (showSDoc $ ppr tycon)
612 -- Create a subst that instantiates all types passed to the tycon
613 -- TODO: I'm not 100% sure that this is the right way to do this. It seems
614 -- to work so far, though..
615 tyvars = TyCon.tyConTyVars tycon
616 subst = CoreSubst.extendTvSubstList CoreSubst.emptySubst (zip tyvars args)
618 -- | Create a VHDL vector type
620 Int -- ^ The length of the vector
621 -> Type.Type -- ^ The Haskell element type of the Vector
622 -> Type.Type -- ^ The Haskell type to create a VHDL type for
623 -> VHDLState (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
625 mk_vector_ty len el_ty 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 [naturalTM] el_ty_tm
638 modA vsElemTypes (Map.insert (OrdType el_ty) (vec_id, vec_def))
639 modA vsTypeFuns (Map.insert (OrdType 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 -> Type.Type -- ^ The Haskell type to create a VHDL type for
647 -> VHDLState (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
648 mk_natural_ty min_bound max_bound ty = do
649 let ty_id = mkVHDLExtId $ "nat_" ++ (show min_bound) ++ "_to_" ++ (show max_bound)
650 let range = AST.ConstraintRange $ AST.SubTypeRange (AST.PrimLit $ (show min_bound)) (AST.PrimLit $ (show max_bound))
651 let ty_def = AST.SubtypeIn naturalTM (Just range)
652 return (ty_id, ty_def)
657 ("Bit", std_logic_ty),
658 ("Bool", bool_ty) -- TysWiredIn.boolTy
662 -- Can only contain alphanumerics and underscores. The supplied string must be
663 -- a valid basic id, otherwise an error value is returned. This function is
664 -- not meant to be passed identifiers from a source file, use mkVHDLExtId for
666 mkVHDLBasicId :: String -> AST.VHDLId
668 AST.unsafeVHDLBasicId $ (strip_multiscore . strip_leading . strip_invalid) s
670 -- Strip invalid characters.
671 strip_invalid = filter (`elem` ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ "_.")
672 -- Strip leading numbers and underscores
673 strip_leading = dropWhile (`elem` ['0'..'9'] ++ "_")
674 -- Strip multiple adjacent underscores
675 strip_multiscore = concat . map (\cs ->
681 -- Shortcut for Extended VHDL Id's. These Id's can contain a lot more
682 -- different characters than basic ids, but can never be used to refer to
684 -- Use extended Ids for any values that are taken from the source file.
685 mkVHDLExtId :: String -> AST.VHDLId
687 AST.unsafeVHDLExtId $ strip_invalid s
689 -- Allowed characters, taken from ForSyde's mkVHDLExtId
690 allowed = ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ " \"#&\\'()*+,./:;<=>_|!$%@?[]^`{}~-"
691 strip_invalid = filter (`elem` allowed)
693 -- Creates a VHDL Id from a binder
698 bndrToVHDLId = mkVHDLExtId . OccName.occNameString . Name.nameOccName . Var.varName
700 -- Extracts the binder name as a String
704 bndrToString = OccName.occNameString . Name.nameOccName . Var.varName
706 -- Get the string version a Var's unique
707 varToStringUniq = show . Var.varUnique
709 -- Extracts the string version of the name
710 nameToString :: Name.Name -> String
711 nameToString = OccName.occNameString . Name.nameOccName
713 recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
715 -- | Map a port specification of a builtin function to a VHDL Signal to put in
717 toVHDLSignalMapElement :: (String, AST.TypeMark) -> VHDLSignalMapElement
718 toVHDLSignalMapElement (name, ty) = Just (mkVHDLBasicId name, ty)