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 signatures <- getA vsSignatures
298 case (Map.lookup (bndrToString f) funSignatures) of
299 Just (arg_count, builder) ->
300 if length valargs == arg_count then
304 sigs = map (varToVHDLExpr.varBndr) valargs
305 func = funBuilder sigs
306 src_wform = AST.Wform [AST.WformElem func Nothing]
307 dst_name = AST.NSimple (mkVHDLExtId (bndrToString bndr))
308 assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
310 return [AST.CSSASm assign]
313 sigs = map varBndr valargs
314 signature = Maybe.fromMaybe
315 (error $ "Using function '" ++ (bndrToString (head sigs)) ++ "' without signature? This should not happen!")
316 (Map.lookup (head sigs) signatures)
317 arg_names = map (mkVHDLExtId . bndrToString) (tail sigs)
318 dst_name = mkVHDLExtId (bndrToString bndr)
319 genSm = genBuilder 4 signature (arg_names ++ [dst_name])
320 in return [AST.CSGSm genSm]
322 error $ "VHDL.mkConcSm Incorrect number of arguments to builtin function: " ++ pprString f ++ " Args: " ++ pprString valargs
323 Nothing -> error $ "Using function from another module that is not a known builtin: " ++ pprString f
324 IdInfo.NotGlobalId -> do
325 signatures <- getA vsSignatures
326 -- This is a local id, so it should be a function whose definition we
327 -- have and which can be turned into a component instantiation.
329 signature = Maybe.fromMaybe
330 (error $ "Using function '" ++ (bndrToString f) ++ "' without signature? This should not happen!")
331 (Map.lookup f signatures)
332 entity_id = ent_id signature
333 label = "comp_ins_" ++ bndrToString bndr
334 -- Add a clk port if we have state
335 --clk_port = Maybe.fromJust $ mkAssocElem (Just $ mkVHDLExtId "clk") "clk"
336 clk_port = Maybe.fromJust $ mkAssocElem (Just $ mkVHDLExtId "clk") "clk"
337 --portmaps = mkAssocElems sigs args res signature ++ (if hasState hsfunc then [clk_port] else [])
338 portmaps = clk_port : mkAssocElems args bndr signature
340 return [AST.CSISm $ AST.CompInsSm (mkVHDLExtId label) (AST.IUEntity (AST.NSimple entity_id)) (AST.PMapAspect portmaps)]
341 details -> error $ "Calling unsupported function " ++ pprString f ++ " with GlobalIdDetails " ++ pprString details
343 -- A single alt case must be a selector. This means thee scrutinee is a simple
344 -- variable, the alternative is a dataalt with a single non-wild binder that
346 mkConcSm (bndr, expr@(Case (Var scrut) b ty [alt])) =
348 (DataAlt dc, bndrs, (Var sel_bndr)) -> do
349 case List.elemIndex sel_bndr bndrs of
351 labels <- getFieldLabels (Id.idType scrut)
352 let label = labels!!i
353 let sel_name = mkSelectedName scrut label
354 let sel_expr = AST.PrimName sel_name
355 return [mkUncondAssign (Left bndr) sel_expr]
356 Nothing -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
358 _ -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
360 -- Multiple case alt are be conditional assignments and have only wild
361 -- binders in the alts and only variables in the case values and a variable
362 -- for a scrutinee. We check the constructor of the second alt, since the
363 -- first is the default case, if there is any.
364 mkConcSm (bndr, (Case (Var scrut) b ty [(_, _, Var false), (con, _, Var true)])) =
366 cond_expr = (varToVHDLExpr scrut) AST.:=: (altconToVHDLExpr con)
367 true_expr = (varToVHDLExpr true)
368 false_expr = (varToVHDLExpr false)
370 return [mkCondAssign (Left bndr) cond_expr true_expr false_expr]
371 mkConcSm (_, (Case (Var _) _ _ alts)) = error "VHDL.mkConcSm Not in normal form: Case statement with more than two alternatives"
372 mkConcSm (_, Case _ _ _ _) = error "VHDL.mkConcSm Not in normal form: Case statement has does not have a simple variable as scrutinee"
373 mkConcSm (bndr, expr) = error $ "VHDL.mkConcSM Unsupported binding in let expression: " ++ pprString bndr ++ " = " ++ pprString expr
375 -- Create an unconditional assignment statement
377 Either CoreBndr AST.VHDLName -- ^ The signal to assign to
378 -> AST.Expr -- ^ The expression to assign
379 -> AST.ConcSm -- ^ The resulting concurrent statement
380 mkUncondAssign dst expr = mkAssign dst Nothing expr
382 -- Create a conditional assignment statement
384 Either CoreBndr AST.VHDLName -- ^ The signal to assign to
385 -> AST.Expr -- ^ The condition
386 -> AST.Expr -- ^ The value when true
387 -> AST.Expr -- ^ The value when false
388 -> AST.ConcSm -- ^ The resulting concurrent statement
389 mkCondAssign dst cond true false = mkAssign dst (Just (cond, true)) false
391 -- Create a conditional or unconditional assignment statement
393 Either CoreBndr AST.VHDLName -> -- ^ The signal to assign to
394 Maybe (AST.Expr , AST.Expr) -> -- ^ Optionally, the condition to test for
395 -- and the value to assign when true.
396 AST.Expr -> -- ^ The value to assign when false or no condition
397 AST.ConcSm -- ^ The resulting concurrent statement
399 mkAssign dst cond false_expr =
401 -- I'm not 100% how this assignment AST works, but this gets us what we
403 whenelse = case cond of
404 Just (cond_expr, true_expr) ->
406 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
408 [AST.WhenElse true_wform cond_expr]
410 false_wform = AST.Wform [AST.WformElem false_expr Nothing]
411 dst_name = case dst of
412 Left bndr -> AST.NSimple (bndrToVHDLId bndr)
414 assign = dst_name AST.:<==: (AST.ConWforms whenelse false_wform Nothing)
418 -- Create a record field selector that selects the given label from the record
419 -- stored in the given binder.
420 mkSelectedName :: CoreBndr -> AST.VHDLId -> AST.VHDLName
421 mkSelectedName bndr label =
423 sel_prefix = AST.NSimple $ bndrToVHDLId bndr
424 sel_suffix = AST.SSimple $ label
426 AST.NSelected $ sel_prefix AST.:.: sel_suffix
428 -- Finds the field labels for VHDL type generated for the given Core type,
429 -- which must result in a record type.
430 getFieldLabels :: Type.Type -> VHDLState [AST.VHDLId]
431 getFieldLabels ty = do
432 -- Ensure that the type is generated (but throw away it's VHDLId)
434 -- Get the types map, lookup and unpack the VHDL TypeDef
435 types <- getA vsTypes
436 case Map.lookup (OrdType ty) types of
437 Just (_, Left (AST.TDR (AST.RecordTypeDef elems))) -> return $ map (\(AST.ElementDec id _) -> id) elems
438 _ -> error $ "VHDL.getFieldLabels Type not found or not a record type? This should not happen! Type: " ++ (show ty)
440 -- Turn a variable reference into a AST expression
441 varToVHDLExpr :: Var.Var -> AST.Expr
443 case Id.isDataConWorkId_maybe var of
444 Just dc -> dataconToVHDLExpr dc
445 -- This is a dataconstructor.
446 -- Not a datacon, just another signal. Perhaps we should check for
447 -- local/global here as well?
448 Nothing -> AST.PrimName $ AST.NSimple $ bndrToVHDLId var
450 -- Turn a alternative constructor into an AST expression. For
451 -- dataconstructors, this is only the constructor itself, not any arguments it
452 -- has. Should not be called with a DEFAULT constructor.
453 altconToVHDLExpr :: CoreSyn.AltCon -> AST.Expr
454 altconToVHDLExpr (DataAlt dc) = dataconToVHDLExpr dc
456 altconToVHDLExpr (LitAlt _) = error "VHDL.conToVHDLExpr Literals not support in case alternatives yet"
457 altconToVHDLExpr DEFAULT = error "VHDL.conToVHDLExpr DEFAULT alternative should not occur here!"
459 -- Turn a datacon (without arguments!) into a VHDL expression.
460 dataconToVHDLExpr :: DataCon.DataCon -> AST.Expr
461 dataconToVHDLExpr dc = AST.PrimLit lit
463 tycon = DataCon.dataConTyCon dc
464 tyname = TyCon.tyConName tycon
465 dcname = DataCon.dataConName dc
466 lit = case Name.getOccString tyname of
467 -- TODO: Do something more robust than string matching
468 "Bit" -> case Name.getOccString dcname of "High" -> "'1'"; "Low" -> "'0'"
469 "Bool" -> case Name.getOccString dcname of "True" -> "true"; "False" -> "false"
473 mkConcSm sigs (UncondDef src dst) _ = do
474 src_expr <- vhdl_expr src
475 let src_wform = AST.Wform [AST.WformElem src_expr Nothing]
476 let dst_name = AST.NSimple (getSignalId $ signalInfo sigs dst)
477 let assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
478 return $ AST.CSSASm assign
480 vhdl_expr (Left id) = return $ mkIdExpr sigs id
481 vhdl_expr (Right expr) =
484 return $ (mkIdExpr sigs id) AST.:=: (AST.PrimLit lit)
485 (Literal lit Nothing) ->
486 return $ AST.PrimLit lit
487 (Literal lit (Just ty)) -> do
488 -- Create a cast expression, which is just a function call using the
489 -- type name as the function name.
490 let litexpr = AST.PrimLit lit
492 let ty_name = AST.NSimple ty_id
493 let args = [Nothing AST.:=>: (AST.ADExpr litexpr)]
494 return $ AST.PrimFCall $ AST.FCall ty_name args
496 return $ (mkIdExpr sigs a) AST.:=: (mkIdExpr sigs b)
498 mkConcSm sigs (CondDef cond true false dst) _ =
500 cond_expr = mkIdExpr sigs cond
501 true_expr = mkIdExpr sigs true
502 false_expr = mkIdExpr sigs false
503 false_wform = AST.Wform [AST.WformElem false_expr Nothing]
504 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
505 whenelse = AST.WhenElse true_wform cond_expr
506 dst_name = AST.NSimple (getSignalId $ signalInfo sigs dst)
507 assign = dst_name AST.:<==: (AST.ConWforms [whenelse] false_wform Nothing)
509 return $ AST.CSSASm assign
511 -- | Turn a SignalId into a VHDL Expr
512 mkIdExpr :: [(SignalId, SignalInfo)] -> SignalId -> AST.Expr
514 let src_name = AST.NSimple (getSignalId $ signalInfo sigs id) in
515 AST.PrimName src_name
518 [CoreSyn.CoreExpr] -- | The argument that are applied to function
519 -> CoreSyn.CoreBndr -- | The binder in which to store the result
520 -> Entity -- | The entity to map against.
521 -> [AST.AssocElem] -- | The resulting port maps
523 mkAssocElems args res entity =
524 -- Create the actual AssocElems
525 Maybe.catMaybes $ zipWith mkAssocElem ports sigs
527 -- Turn the ports and signals from a map into a flat list. This works,
528 -- since the maps must have an identical form by definition. TODO: Check
530 arg_ports = ent_args entity
531 res_port = ent_res entity
532 -- Extract the id part from the (id, type) tuple
533 ports = map (Monad.liftM fst) (res_port : arg_ports)
534 -- Translate signal numbers into names
535 sigs = (bndrToString res : map (bndrToString.varBndr) args)
537 -- Turns a Var CoreExpr into the Id inside it. Will of course only work for
538 -- simple Var CoreExprs, not complexer ones.
539 varBndr :: CoreSyn.CoreExpr -> Var.Id
540 varBndr (CoreSyn.Var id) = id
542 -- | Look up a signal in the signal name map
543 lookupSigName :: [(SignalId, SignalInfo)] -> SignalId -> String
544 lookupSigName sigs sig = name
546 info = Maybe.fromMaybe
547 (error $ "Unknown signal " ++ (show sig) ++ " used? This should not happen!")
549 name = Maybe.fromMaybe
550 (error $ "Unnamed signal " ++ (show sig) ++ " used? This should not happen!")
553 -- | Create an VHDL port -> signal association
554 mkAssocElem :: Maybe AST.VHDLId -> String -> Maybe AST.AssocElem
555 mkAssocElem (Just port) signal = Just $ Just port AST.:=>: (AST.ADName (AST.NSimple (mkVHDLExtId signal)))
556 mkAssocElem Nothing _ = Nothing
558 -- | The VHDL Bit type
559 bit_ty :: AST.TypeMark
560 bit_ty = AST.unsafeVHDLBasicId "Bit"
562 -- | The VHDL Boolean type
563 bool_ty :: AST.TypeMark
564 bool_ty = AST.unsafeVHDLBasicId "Boolean"
566 -- | The VHDL std_logic
567 std_logic_ty :: AST.TypeMark
568 std_logic_ty = AST.unsafeVHDLBasicId "std_logic"
570 -- Translate a Haskell type to a VHDL type
571 vhdl_ty :: Type.Type -> VHDLState AST.TypeMark
573 typemap <- getA vsTypes
574 let builtin_ty = do -- See if this is a tycon and lookup its name
575 (tycon, args) <- Type.splitTyConApp_maybe ty
576 let name = Name.getOccString (TyCon.tyConName tycon)
577 Map.lookup name builtin_types
578 -- If not a builtin type, try the custom types
579 let existing_ty = (fmap fst) $ Map.lookup (OrdType ty) typemap
580 case Monoid.getFirst $ Monoid.mconcat (map Monoid.First [builtin_ty, existing_ty]) of
581 -- Found a type, return it
583 -- No type yet, try to construct it
585 newty_maybe <- (construct_vhdl_ty ty)
587 Just (ty_id, ty_def) -> do
588 -- TODO: Check name uniqueness
589 modA vsTypes (Map.insert (OrdType ty) (ty_id, ty_def))
591 Nothing -> error $ "Unsupported Haskell type: " ++ (showSDoc $ ppr ty)
593 -- Construct a new VHDL type for the given Haskell type.
594 construct_vhdl_ty :: Type.Type -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
595 construct_vhdl_ty ty = do
596 case Type.splitTyConApp_maybe ty of
597 Just (tycon, args) -> do
598 let name = Name.getOccString (TyCon.tyConName tycon)
601 res <- mk_vector_ty (tfvec_len ty) (tfvec_elem ty)
602 return $ Just $ (Arrow.second Right) res
604 -- res <- mk_vector_ty (sized_word_len ty) ty
605 -- return $ Just $ (Arrow.second Left) res
607 res <- mk_natural_ty 0 (ranged_word_bound ty)
608 return $ Just $ (Arrow.second Right) res
609 -- Create a custom type from this tycon
610 otherwise -> mk_tycon_ty tycon args
611 Nothing -> return $ Nothing
613 -- | Create VHDL type for a custom tycon
614 mk_tycon_ty :: TyCon.TyCon -> [Type.Type] -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
615 mk_tycon_ty tycon args =
616 case TyCon.tyConDataCons tycon of
617 -- Not an algebraic type
618 [] -> error $ "Only custom algebraic types are supported: " ++ (showSDoc $ ppr tycon)
620 let arg_tys = DataCon.dataConRepArgTys dc
621 -- TODO: CoreSubst docs say each Subs can be applied only once. Is this a
622 -- violation? Or does it only mean not to apply it again to the same
624 let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
625 elem_tys <- mapM vhdl_ty real_arg_tys
626 let elems = zipWith AST.ElementDec recordlabels elem_tys
627 -- For a single construct datatype, build a record with one field for
629 -- TODO: Add argument type ids to this, to ensure uniqueness
630 -- TODO: Special handling for tuples?
631 let ty_id = mkVHDLExtId $ nameToString (TyCon.tyConName tycon)
632 let ty_def = AST.TDR $ AST.RecordTypeDef elems
633 return $ Just (ty_id, Left ty_def)
634 dcs -> error $ "Only single constructor datatypes supported: " ++ (showSDoc $ ppr tycon)
636 -- Create a subst that instantiates all types passed to the tycon
637 -- TODO: I'm not 100% sure that this is the right way to do this. It seems
638 -- to work so far, though..
639 tyvars = TyCon.tyConTyVars tycon
640 subst = CoreSubst.extendTvSubstList CoreSubst.emptySubst (zip tyvars args)
642 -- | Create a VHDL vector type
644 Int -- ^ The length of the vector
645 -> Type.Type -- ^ The Haskell element type of the Vector
646 -> VHDLState (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
648 mk_vector_ty len el_ty = do
649 elem_types_map <- getA vsElemTypes
650 el_ty_tm <- vhdl_ty el_ty
651 let ty_id = mkVHDLExtId $ "vector-"++ (AST.fromVHDLId el_ty_tm) ++ "-0_to_" ++ (show len)
652 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len - 1))]
653 let existing_elem_ty = (fmap fst) $ Map.lookup (OrdType el_ty) elem_types_map
654 case existing_elem_ty of
656 let ty_def = AST.SubtypeIn t (Just range)
657 return (ty_id, ty_def)
659 let vec_id = mkVHDLExtId $ "vector_" ++ (AST.fromVHDLId el_ty_tm)
660 let vec_def = AST.TDA $ AST.UnconsArrayDef [tfvec_indexTM] el_ty_tm
661 modA vsElemTypes (Map.insert (OrdType el_ty) (vec_id, vec_def))
662 modA vsTypeFuns (Map.insert (OrdType el_ty) (genUnconsVectorFuns el_ty_tm vec_id))
663 let ty_def = AST.SubtypeIn vec_id (Just range)
664 return (ty_id, ty_def)
667 Int -- ^ The minimum bound (> 0)
668 -> Int -- ^ The maximum bound (> minimum bound)
669 -> VHDLState (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
670 mk_natural_ty min_bound max_bound = do
671 let ty_id = mkVHDLExtId $ "nat_" ++ (show min_bound) ++ "_to_" ++ (show max_bound)
672 let range = AST.ConstraintRange $ AST.SubTypeRange (AST.PrimLit $ (show min_bound)) (AST.PrimLit $ (show max_bound))
673 let ty_def = AST.SubtypeIn naturalTM (Just range)
674 return (ty_id, ty_def)
678 ("Bit", std_logic_ty),
679 ("Bool", bool_ty) -- TysWiredIn.boolTy
683 -- Can only contain alphanumerics and underscores. The supplied string must be
684 -- a valid basic id, otherwise an error value is returned. This function is
685 -- not meant to be passed identifiers from a source file, use mkVHDLExtId for
687 mkVHDLBasicId :: String -> AST.VHDLId
689 AST.unsafeVHDLBasicId $ (strip_multiscore . strip_leading . strip_invalid) s
691 -- Strip invalid characters.
692 strip_invalid = filter (`elem` ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ "_.")
693 -- Strip leading numbers and underscores
694 strip_leading = dropWhile (`elem` ['0'..'9'] ++ "_")
695 -- Strip multiple adjacent underscores
696 strip_multiscore = concat . map (\cs ->
702 -- Shortcut for Extended VHDL Id's. These Id's can contain a lot more
703 -- different characters than basic ids, but can never be used to refer to
705 -- Use extended Ids for any values that are taken from the source file.
706 mkVHDLExtId :: String -> AST.VHDLId
708 AST.unsafeVHDLExtId $ strip_invalid s
710 -- Allowed characters, taken from ForSyde's mkVHDLExtId
711 allowed = ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ " \"#&\\'()*+,./:;<=>_|!$%@?[]^`{}~-"
712 strip_invalid = filter (`elem` allowed)
714 -- Creates a VHDL Id from a binder
719 bndrToVHDLId = mkVHDLExtId . OccName.occNameString . Name.nameOccName . Var.varName
721 -- Extracts the binder name as a String
725 bndrToString = OccName.occNameString . Name.nameOccName . Var.varName
727 -- Get the string version a Var's unique
728 varToStringUniq = show . Var.varUnique
730 -- Extracts the string version of the name
731 nameToString :: Name.Name -> String
732 nameToString = OccName.occNameString . Name.nameOccName
734 recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
736 -- | Map a port specification of a builtin function to a VHDL Signal to put in
738 toVHDLSignalMapElement :: (String, AST.TypeMark) -> VHDLSignalMapElement
739 toVHDLSignalMapElement (name, ty) = Just (mkVHDLBasicId name, ty)