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 statements <- Monad.mapM mkConcSm binds
211 return $ AST.ArchBody (mkVHDLBasicId "structural") (AST.NSimple entity_id) (map AST.BDISD sig_decs) (statements ++ procs')
213 procs = map mkStateProcSm [] -- (makeStatePairs flatfunc)
214 procs' = map AST.CSPSm procs
215 -- mkSigDec only uses vsTypes from the state
218 -- | Looks up all pairs of old state, new state signals, together with
219 -- the state id they represent.
220 makeStatePairs :: FlatFunction -> [(StateId, SignalInfo, SignalInfo)]
221 makeStatePairs flatfunc =
222 [(Maybe.fromJust $ oldStateId $ sigUse old_info, old_info, new_info)
223 | old_info <- map snd (flat_sigs flatfunc)
224 , new_info <- map snd (flat_sigs flatfunc)
225 -- old_info must be an old state (and, because of the next equality,
226 -- new_info must be a new state).
227 , Maybe.isJust $ oldStateId $ sigUse old_info
228 -- And the state numbers must match
229 , (oldStateId $ sigUse old_info) == (newStateId $ sigUse new_info)]
231 -- Replace the second tuple element with the corresponding SignalInfo
232 --args_states = map (Arrow.second $ signalInfo sigs) args
233 mkStateProcSm :: (StateId, SignalInfo, SignalInfo) -> AST.ProcSm
234 mkStateProcSm (num, old, new) =
235 AST.ProcSm label [clk] [statement]
237 label = mkVHDLExtId $ "state_" ++ (show num)
238 clk = mkVHDLExtId "clk"
239 rising_edge = AST.NSimple $ mkVHDLBasicId "rising_edge"
240 wform = AST.Wform [AST.WformElem (AST.PrimName $ AST.NSimple $ getSignalId new) Nothing]
241 assign = AST.SigAssign (AST.NSimple $ getSignalId old) wform
242 rising_edge_clk = AST.PrimFCall $ AST.FCall rising_edge [Nothing AST.:=>: (AST.ADName $ AST.NSimple clk)]
243 statement = AST.IfSm rising_edge_clk [assign] [] Nothing
245 mkSigDec :: CoreSyn.CoreBndr -> VHDLState (Maybe AST.SigDec)
247 if True then do --isInternalSigUse use || isStateSigUse use then do
248 type_mark <- vhdl_ty $ Var.varType bndr
249 return $ Just (AST.SigDec (bndrToVHDLId bndr) type_mark Nothing)
253 -- | Creates a VHDL Id from a named SignalInfo. Errors out if the SignalInfo
255 getSignalId :: SignalInfo -> AST.VHDLId
257 mkVHDLExtId $ Maybe.fromMaybe
258 (error $ "Unnamed signal? This should not happen!")
261 -- | Transforms a core binding into a VHDL concurrent statement
263 (CoreSyn.CoreBndr, CoreSyn.CoreExpr) -- ^ The binding to process
264 -> VHDLState AST.ConcSm -- ^ The corresponding VHDL component instantiation.
266 mkConcSm (bndr, app@(CoreSyn.App _ _))= do
267 let (CoreSyn.Var f, args) = CoreSyn.collectArgs app
268 let valargs' = filter isValArg args
269 let valargs = filter (\(CoreSyn.Var bndr) -> not (Id.isDictId bndr)) valargs'
270 case Var.globalIdVarDetails f of
271 IdInfo.DataConWorkId dc ->
272 -- It's a datacon. Create a record from its arguments.
273 -- First, filter out type args. TODO: Is this the best way to do this?
274 -- The types should already have been taken into acocunt when creating
275 -- the signal, so this should probably work...
276 --let valargs = filter isValArg args in
277 if all is_var valargs then do
278 labels <- getFieldLabels (CoreUtils.exprType app)
279 let assigns = zipWith mkassign labels valargs
280 let block_id = bndrToVHDLId bndr
281 let block = AST.BlockSm block_id [] (AST.PMapAspect []) [] assigns
282 return $ AST.CSBSm block
284 error $ "VHDL.mkConcSm Not in normal form: One ore more complex arguments: " ++ pprString args
286 mkassign :: AST.VHDLId -> CoreExpr -> AST.ConcSm
287 mkassign label (Var arg) =
288 let sel_name = mkSelectedName bndr label in
289 mkUncondAssign (Right sel_name) (varToVHDLExpr arg)
290 IdInfo.VanillaGlobal -> do
291 -- It's a global value imported from elsewhere. These can be builtin
293 funSignatures <- getA vsNameTable
294 case (Map.lookup (bndrToString f) funSignatures) of
295 Just (arg_count, builder) ->
296 if length valargs == arg_count then
298 sigs = map (bndrToString.varBndr) valargs
299 sigsNames = map (\signal -> (AST.PrimName (AST.NSimple (mkVHDLExtId signal)))) sigs
300 func = builder sigsNames
301 src_wform = AST.Wform [AST.WformElem func Nothing]
302 dst_name = AST.NSimple (mkVHDLExtId (bndrToString bndr))
303 assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
305 return $ AST.CSSASm assign
307 error $ "VHDL.mkConcSm Incorrect number of arguments to builtin function: " ++ pprString f ++ " Args: " ++ pprString valargs
308 Nothing -> error $ "Using function from another module that is not a known builtin: " ++ pprString f
309 IdInfo.NotGlobalId -> do
310 signatures <- getA vsSignatures
311 -- This is a local id, so it should be a function whose definition we
312 -- have and which can be turned into a component instantiation.
314 signature = Maybe.fromMaybe
315 (error $ "Using function '" ++ (bndrToString f) ++ "' without signature? This should not happen!")
316 (Map.lookup f signatures)
317 entity_id = ent_id signature
318 label = bndrToString bndr
319 -- Add a clk port if we have state
320 --clk_port = Maybe.fromJust $ mkAssocElem (Just $ mkVHDLExtId "clk") "clk"
321 --portmaps = mkAssocElems sigs args res signature ++ (if hasState hsfunc then [clk_port] else [])
322 portmaps = mkAssocElems args bndr signature
324 return $ AST.CSISm $ AST.CompInsSm (mkVHDLExtId label) (AST.IUEntity (AST.NSimple entity_id)) (AST.PMapAspect portmaps)
325 details -> error $ "Calling unsupported function " ++ pprString f ++ " with GlobalIdDetails " ++ pprString details
327 -- GHC generates some funny "r = r" bindings in let statements before
328 -- simplification. This outputs some dummy ConcSM for these, so things will at
329 -- least compile for now.
330 mkConcSm (bndr, CoreSyn.Var _) = return $ AST.CSPSm $ AST.ProcSm (mkVHDLBasicId "unused") [] []
332 -- A single alt case must be a selector. This means thee scrutinee is a simple
333 -- variable, the alternative is a dataalt with a single non-wild binder that
335 mkConcSm (bndr, expr@(Case (Var scrut) b ty [alt])) =
337 (DataAlt dc, bndrs, (Var sel_bndr)) -> do
338 case List.elemIndex sel_bndr bndrs of
340 labels <- getFieldLabels (Id.idType scrut)
341 let label = labels!!i
342 let sel_name = mkSelectedName scrut label
343 let sel_expr = AST.PrimName sel_name
344 return $ mkUncondAssign (Left bndr) sel_expr
345 Nothing -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
347 _ -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
349 -- Multiple case alt are be conditional assignments and have only wild
350 -- binders in the alts and only variables in the case values and a variable
351 -- for a scrutinee. We check the constructor of the second alt, since the
352 -- first is the default case, if there is any.
353 mkConcSm (bndr, (Case (Var scrut) b ty [(_, _, Var false), (con, _, Var true)])) =
355 cond_expr = (varToVHDLExpr scrut) AST.:=: (conToVHDLExpr con)
356 true_expr = (varToVHDLExpr true)
357 false_expr = (varToVHDLExpr false)
359 return $ mkCondAssign (Left bndr) cond_expr true_expr false_expr
360 mkConcSm (_, (Case (Var _) _ _ alts)) = error "VHDL.mkConcSm Not in normal form: Case statement with more than two alternatives"
361 mkConcSm (_, Case _ _ _ _) = error "VHDL.mkConcSm Not in normal form: Case statement has does not have a simple variable as scrutinee"
362 mkConcSm (bndr, expr) = error $ "VHDL.mkConcSM Unsupported binding in let expression: " ++ pprString bndr ++ " = " ++ pprString expr
364 -- Create an unconditional assignment statement
366 Either CoreBndr AST.VHDLName -- ^ The signal to assign to
367 -> AST.Expr -- ^ The expression to assign
368 -> AST.ConcSm -- ^ The resulting concurrent statement
369 mkUncondAssign dst expr = mkAssign dst Nothing expr
371 -- Create a conditional assignment statement
373 Either CoreBndr AST.VHDLName -- ^ The signal to assign to
374 -> AST.Expr -- ^ The condition
375 -> AST.Expr -- ^ The value when true
376 -> AST.Expr -- ^ The value when false
377 -> AST.ConcSm -- ^ The resulting concurrent statement
378 mkCondAssign dst cond true false = mkAssign dst (Just (cond, true)) false
380 -- Create a conditional or unconditional assignment statement
382 Either CoreBndr AST.VHDLName -> -- ^ The signal to assign to
383 Maybe (AST.Expr , AST.Expr) -> -- ^ Optionally, the condition to test for
384 -- and the value to assign when true.
385 AST.Expr -> -- ^ The value to assign when false or no condition
386 AST.ConcSm -- ^ The resulting concurrent statement
388 mkAssign dst cond false_expr =
390 -- I'm not 100% how this assignment AST works, but this gets us what we
392 whenelse = case cond of
393 Just (cond_expr, true_expr) ->
395 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
397 [AST.WhenElse true_wform cond_expr]
399 false_wform = AST.Wform [AST.WformElem false_expr Nothing]
400 dst_name = case dst of
401 Left bndr -> AST.NSimple (bndrToVHDLId bndr)
403 assign = dst_name AST.:<==: (AST.ConWforms whenelse false_wform Nothing)
407 -- Create a record field selector that selects the given label from the record
408 -- stored in the given binder.
409 mkSelectedName :: CoreBndr -> AST.VHDLId -> AST.VHDLName
410 mkSelectedName bndr label =
412 sel_prefix = AST.NSimple $ bndrToVHDLId bndr
413 sel_suffix = AST.SSimple $ label
415 AST.NSelected $ sel_prefix AST.:.: sel_suffix
417 -- Finds the field labels for VHDL type generated for the given Core type,
418 -- which must result in a record type.
419 getFieldLabels :: Type.Type -> VHDLState [AST.VHDLId]
420 getFieldLabels ty = do
421 -- Ensure that the type is generated (but throw away it's VHDLId)
423 -- Get the types map, lookup and unpack the VHDL TypeDef
424 types <- getA vsTypes
425 case Map.lookup (OrdType ty) types of
426 Just (_, Left (AST.TDR (AST.RecordTypeDef elems))) -> return $ map (\(AST.ElementDec id _) -> id) elems
427 _ -> error $ "VHDL.getFieldLabels Type not found or not a record type? This should not happen! Type: " ++ (show ty)
429 -- Turn a variable reference into a AST expression
430 varToVHDLExpr :: Var.Var -> AST.Expr
431 varToVHDLExpr var = AST.PrimName $ AST.NSimple $ bndrToVHDLId var
433 -- Turn a constructor into an AST expression. For dataconstructors, this is
434 -- only the constructor itself, not any arguments it has. Should not be called
435 -- with a DEFAULT constructor.
436 conToVHDLExpr :: CoreSyn.AltCon -> AST.Expr
437 conToVHDLExpr (DataAlt dc) = AST.PrimLit lit
439 tycon = DataCon.dataConTyCon dc
440 tyname = TyCon.tyConName tycon
441 dcname = DataCon.dataConName dc
442 lit = case Name.getOccString tyname of
443 -- TODO: Do something more robust than string matching
444 "Bit" -> case Name.getOccString dcname of "High" -> "'1'"; "Low" -> "'0'"
445 "Bool" -> case Name.getOccString dcname of "True" -> "true"; "False" -> "false"
446 conToVHDLExpr (LitAlt _) = error "VHDL.conToVHDLExpr Literals not support in case alternatives yet"
447 conToVHDLExpr DEFAULT = error "VHDL.conToVHDLExpr DEFAULT alternative should not occur here!"
452 mkConcSm sigs (UncondDef src dst) _ = do
453 src_expr <- vhdl_expr src
454 let src_wform = AST.Wform [AST.WformElem src_expr Nothing]
455 let dst_name = AST.NSimple (getSignalId $ signalInfo sigs dst)
456 let assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
457 return $ AST.CSSASm assign
459 vhdl_expr (Left id) = return $ mkIdExpr sigs id
460 vhdl_expr (Right expr) =
463 return $ (mkIdExpr sigs id) AST.:=: (AST.PrimLit lit)
464 (Literal lit Nothing) ->
465 return $ AST.PrimLit lit
466 (Literal lit (Just ty)) -> do
467 -- Create a cast expression, which is just a function call using the
468 -- type name as the function name.
469 let litexpr = AST.PrimLit lit
471 let ty_name = AST.NSimple ty_id
472 let args = [Nothing AST.:=>: (AST.ADExpr litexpr)]
473 return $ AST.PrimFCall $ AST.FCall ty_name args
475 return $ (mkIdExpr sigs a) AST.:=: (mkIdExpr sigs b)
477 mkConcSm sigs (CondDef cond true false dst) _ =
479 cond_expr = mkIdExpr sigs cond
480 true_expr = mkIdExpr sigs true
481 false_expr = mkIdExpr sigs false
482 false_wform = AST.Wform [AST.WformElem false_expr Nothing]
483 true_wform = AST.Wform [AST.WformElem true_expr Nothing]
484 whenelse = AST.WhenElse true_wform cond_expr
485 dst_name = AST.NSimple (getSignalId $ signalInfo sigs dst)
486 assign = dst_name AST.:<==: (AST.ConWforms [whenelse] false_wform Nothing)
488 return $ AST.CSSASm assign
490 -- | Turn a SignalId into a VHDL Expr
491 mkIdExpr :: [(SignalId, SignalInfo)] -> SignalId -> AST.Expr
493 let src_name = AST.NSimple (getSignalId $ signalInfo sigs id) in
494 AST.PrimName src_name
497 [CoreSyn.CoreExpr] -- | The argument that are applied to function
498 -> CoreSyn.CoreBndr -- | The binder in which to store the result
499 -> Entity -- | The entity to map against.
500 -> [AST.AssocElem] -- | The resulting port maps
502 mkAssocElems args res entity =
503 -- Create the actual AssocElems
504 Maybe.catMaybes $ zipWith mkAssocElem ports sigs
506 -- Turn the ports and signals from a map into a flat list. This works,
507 -- since the maps must have an identical form by definition. TODO: Check
509 arg_ports = ent_args entity
510 res_port = ent_res entity
511 -- Extract the id part from the (id, type) tuple
512 ports = map (Monad.liftM fst) (res_port : arg_ports)
513 -- Translate signal numbers into names
514 sigs = (bndrToString res : map (bndrToString.varBndr) args)
516 -- Turns a Var CoreExpr into the Id inside it. Will of course only work for
517 -- simple Var CoreExprs, not complexer ones.
518 varBndr :: CoreSyn.CoreExpr -> Var.Id
519 varBndr (CoreSyn.Var id) = id
521 -- | Look up a signal in the signal name map
522 lookupSigName :: [(SignalId, SignalInfo)] -> SignalId -> String
523 lookupSigName sigs sig = name
525 info = Maybe.fromMaybe
526 (error $ "Unknown signal " ++ (show sig) ++ " used? This should not happen!")
528 name = Maybe.fromMaybe
529 (error $ "Unnamed signal " ++ (show sig) ++ " used? This should not happen!")
532 -- | Create an VHDL port -> signal association
533 mkAssocElem :: Maybe AST.VHDLId -> String -> Maybe AST.AssocElem
534 mkAssocElem (Just port) signal = Just $ Just port AST.:=>: (AST.ADName (AST.NSimple (mkVHDLExtId signal)))
535 mkAssocElem Nothing _ = Nothing
537 -- | The VHDL Bit type
538 bit_ty :: AST.TypeMark
539 bit_ty = AST.unsafeVHDLBasicId "Bit"
541 -- | The VHDL Boolean type
542 bool_ty :: AST.TypeMark
543 bool_ty = AST.unsafeVHDLBasicId "Boolean"
545 -- | The VHDL std_logic
546 std_logic_ty :: AST.TypeMark
547 std_logic_ty = AST.unsafeVHDLBasicId "std_logic"
549 -- Translate a Haskell type to a VHDL type
550 vhdl_ty :: Type.Type -> VHDLState AST.TypeMark
552 typemap <- getA vsTypes
553 let builtin_ty = do -- See if this is a tycon and lookup its name
554 (tycon, args) <- Type.splitTyConApp_maybe ty
555 let name = Name.getOccString (TyCon.tyConName tycon)
556 Map.lookup name builtin_types
557 -- If not a builtin type, try the custom types
558 let existing_ty = (fmap fst) $ Map.lookup (OrdType ty) typemap
559 case Monoid.getFirst $ Monoid.mconcat (map Monoid.First [builtin_ty, existing_ty]) of
560 -- Found a type, return it
562 -- No type yet, try to construct it
564 newty_maybe <- (construct_vhdl_ty ty)
566 Just (ty_id, ty_def) -> do
567 -- TODO: Check name uniqueness
568 modA vsTypes (Map.insert (OrdType ty) (ty_id, ty_def))
570 Nothing -> error $ "Unsupported Haskell type: " ++ (showSDoc $ ppr ty)
572 -- Construct a new VHDL type for the given Haskell type.
573 construct_vhdl_ty :: Type.Type -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
574 construct_vhdl_ty ty = do
575 case Type.splitTyConApp_maybe ty of
576 Just (tycon, args) -> do
577 let name = Name.getOccString (TyCon.tyConName tycon)
580 res <- mk_vector_ty (tfvec_len ty) (tfvec_elem ty)
581 return $ Just $ (Arrow.second Right) res
583 -- res <- mk_vector_ty (sized_word_len ty) ty
584 -- return $ Just $ (Arrow.second Left) res
586 res <- mk_natural_ty 0 (ranged_word_bound ty)
587 return $ Just $ (Arrow.second Right) res
588 -- Create a custom type from this tycon
589 otherwise -> mk_tycon_ty tycon args
590 Nothing -> return $ Nothing
592 -- | Create VHDL type for a custom tycon
593 mk_tycon_ty :: TyCon.TyCon -> [Type.Type] -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
594 mk_tycon_ty tycon args =
595 case TyCon.tyConDataCons tycon of
596 -- Not an algebraic type
597 [] -> error $ "Only custom algebraic types are supported: " ++ (showSDoc $ ppr tycon)
599 let arg_tys = DataCon.dataConRepArgTys dc
600 -- TODO: CoreSubst docs say each Subs can be applied only once. Is this a
601 -- violation? Or does it only mean not to apply it again to the same
603 let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
604 elem_tys <- mapM vhdl_ty real_arg_tys
605 let elems = zipWith AST.ElementDec recordlabels elem_tys
606 -- For a single construct datatype, build a record with one field for
608 -- TODO: Add argument type ids to this, to ensure uniqueness
609 -- TODO: Special handling for tuples?
610 let ty_id = mkVHDLExtId $ nameToString (TyCon.tyConName tycon)
611 let ty_def = AST.TDR $ AST.RecordTypeDef elems
612 return $ Just (ty_id, Left ty_def)
613 dcs -> error $ "Only single constructor datatypes supported: " ++ (showSDoc $ ppr tycon)
615 -- Create a subst that instantiates all types passed to the tycon
616 -- TODO: I'm not 100% sure that this is the right way to do this. It seems
617 -- to work so far, though..
618 tyvars = TyCon.tyConTyVars tycon
619 subst = CoreSubst.extendTvSubstList CoreSubst.emptySubst (zip tyvars args)
621 -- | Create a VHDL vector type
623 Int -- ^ The length of the vector
624 -> Type.Type -- ^ The Haskell element type of the Vector
625 -> VHDLState (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
627 mk_vector_ty len el_ty = do
628 elem_types_map <- getA vsElemTypes
629 el_ty_tm <- vhdl_ty el_ty
630 let ty_id = mkVHDLExtId $ "vector-"++ (AST.fromVHDLId el_ty_tm) ++ "-0_to_" ++ (show len)
631 let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len - 1))]
632 let existing_elem_ty = (fmap fst) $ Map.lookup (OrdType el_ty) elem_types_map
633 case existing_elem_ty of
635 let ty_def = AST.SubtypeIn t (Just range)
636 return (ty_id, ty_def)
638 let vec_id = mkVHDLExtId $ "vector_" ++ (AST.fromVHDLId el_ty_tm)
639 let vec_def = AST.TDA $ AST.UnconsArrayDef [tfvec_indexTM] el_ty_tm
640 modA vsElemTypes (Map.insert (OrdType el_ty) (vec_id, vec_def))
641 modA vsTypeFuns (Map.insert (OrdType el_ty) (genUnconsVectorFuns el_ty_tm vec_id))
642 let ty_def = AST.SubtypeIn vec_id (Just range)
643 return (ty_id, ty_def)
646 Int -- ^ The minimum bound (> 0)
647 -> Int -- ^ The maximum bound (> minimum bound)
648 -> VHDLState (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
649 mk_natural_ty min_bound max_bound = do
650 let ty_id = mkVHDLExtId $ "nat_" ++ (show min_bound) ++ "_to_" ++ (show max_bound)
651 let range = AST.ConstraintRange $ AST.SubTypeRange (AST.PrimLit $ (show min_bound)) (AST.PrimLit $ (show max_bound))
652 let ty_def = AST.SubtypeIn naturalTM (Just range)
653 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)