import qualified ForSyDe.Backend.VHDL.AST as AST
import VHDLTypes
+import Flatten
import FlattenTypes
import TranslatorTypes
import Pretty
(sigName info)
ty = sigTy info
--- | Create the VHDL AST for an entity
+ -- | Create the VHDL AST for an entity
createEntityAST ::
HsFunction -- | The signature of the function we're working with
-> [VHDLSignalMap] -- | The entity's arguments
vhdl_id = mkEntityId hsfunc
ports = concatMap (mapToPorts AST.In) args
++ mapToPorts AST.Out res
+ ++ clk_port
mapToPorts :: AST.Mode -> VHDLSignalMap -> [AST.IfaceSigDec]
mapToPorts mode m =
map (mkIfaceSigDec mode) (Foldable.toList m)
+ -- Add a clk port if we have state
+ clk_port = if hasState hsfunc
+ then
+ [AST.IfaceSigDec (mkVHDLId "clk") AST.In VHDL.std_logic_ty]
+ else
+ []
-- | Create a port declaration
mkIfaceSigDec ::
-- res
let sig_decs = [mkSigDec info | (id, info) <- sigs, (all (id `Foldable.notElem`) (res:args)) ]
-- Create component instantiations for all function applications
- insts <- mapM mkCompInsSm apps
+ insts <- mapM (mkCompInsSm sigs) apps
+ let procs = map mkStateProcSm (getOwnStates hsfunc flatfunc)
let insts' = map AST.CSISm insts
- let arch = AST.ArchBody (mkVHDLId "structural") (AST.NSimple entity_id) (map AST.BDISD sig_decs) insts'
+ let procs' = map AST.CSPSm procs
+ let arch = AST.ArchBody (mkVHDLId "structural") (AST.NSimple entity_id) (map AST.BDISD sig_decs) (insts' ++ procs')
setArchitecture hsfunc arch
+mkStateProcSm :: (Int, SignalInfo, SignalInfo) -> AST.ProcSm
+mkStateProcSm (num, old, new) =
+ AST.ProcSm label [clk] [statement]
+ where
+ label = mkVHDLId $ "state_" ++ (show num)
+ clk = mkVHDLId "clk"
+ rising_edge = AST.NSimple $ mkVHDLId "rising_edge"
+ wform = AST.Wform [AST.WformElem (AST.PrimName $ AST.NSimple $ getSignalId new) Nothing]
+ assign = AST.SigAssign (AST.NSimple $ getSignalId old) wform
+ rising_edge_clk = AST.PrimFCall $ AST.FCall rising_edge [Nothing AST.:=>: (AST.ADName $ AST.NSimple clk)]
+ statement = AST.IfSm rising_edge_clk [assign] [] Nothing
+
mkSigDec :: SignalInfo -> AST.SigDec
mkSigDec info =
- AST.SigDec (mkVHDLId name) (vhdl_ty ty) Nothing
+ AST.SigDec (getSignalId info) (vhdl_ty ty) Nothing
where
- name = Maybe.fromMaybe
+ ty = sigTy info
+
+-- | Creates a VHDL Id from a named SignalInfo. Errors out if the SignalInfo
+-- is not named.
+getSignalId :: SignalInfo -> AST.VHDLId
+getSignalId info =
+ mkVHDLId $ Maybe.fromMaybe
(error $ "Unnamed signal? This should not happen!")
(sigName info)
- ty = sigTy info
-- | Transforms a flat function application to a VHDL component instantiation.
mkCompInsSm ::
- FApp UnnamedSignal -- | The application to look at.
+ [(UnnamedSignal, SignalInfo)] -- | The signals in the current architecture
+ -> FApp UnnamedSignal -- | The application to look at.
-> VHDLState AST.CompInsSm -- | The corresponding VHDL component instantiation.
-mkCompInsSm app = do
+mkCompInsSm sigs app = do
let hsfunc = appFunc app
fdata_maybe <- getFunc hsfunc
let fdata = Maybe.fromMaybe
(funcEntity fdata)
let entity_id = ent_id entity
label <- uniqueName (AST.fromVHDLId entity_id)
+ let portmaps = mkAssocElems sigs app entity
return $ AST.CompInsSm (mkVHDLId label) (AST.IUEntity (AST.NSimple entity_id)) (AST.PMapAspect portmaps)
+
+mkAssocElems ::
+ [(UnnamedSignal, SignalInfo)] -- | The signals in the current architecture
+ -> FApp UnnamedSignal -- | The application to look at.
+ -> Entity -- | The entity to map against.
+ -> [AST.AssocElem] -- | The resulting port maps
+
+mkAssocElems sigmap app entity =
+ -- Create the actual AssocElems
+ zipWith mkAssocElem ports sigs
where
- portmaps = []
+ -- Turn the ports and signals from a map into a flat list. This works,
+ -- since the maps must have an identical form by definition. TODO: Check
+ -- the similar form?
+ arg_ports = concat (map Foldable.toList (ent_args entity))
+ res_ports = Foldable.toList (ent_res entity)
+ arg_sigs = (concat (map Foldable.toList (appArgs app)))
+ res_sigs = Foldable.toList (appRes app)
+ -- Extract the id part from the (id, type) tuple
+ ports = (map fst (arg_ports ++ res_ports))
+ -- Translate signal numbers into names
+ sigs = (map (lookupSigName sigmap) (arg_sigs ++ res_sigs))
+
+-- | Look up a signal in the signal name map
+lookupSigName :: [(UnnamedSignal, SignalInfo)] -> UnnamedSignal -> String
+lookupSigName sigs sig = name
+ where
+ info = Maybe.fromMaybe
+ (error $ "Unknown signal " ++ (show sig) ++ " used? This should not happen!")
+ (lookup sig sigs)
+ name = Maybe.fromMaybe
+ (error $ "Unnamed signal " ++ (show sig) ++ " used? This should not happen!")
+ (sigName info)
+
+-- | Create an VHDL port -> signal association
+mkAssocElem :: AST.VHDLId -> String -> AST.AssocElem
+mkAssocElem port signal = Just port AST.:=>: (AST.ADName (AST.NSimple (mkVHDLId signal)))
-- | Extracts the generated entity id from the given funcdata
getEntityId :: FuncData -> Maybe AST.VHDLId
bit_ty :: AST.TypeMark
bit_ty = AST.unsafeVHDLBasicId "Bit"
+-- | The VHDL std_logic
+std_logic_ty :: AST.TypeMark
+std_logic_ty = AST.unsafeVHDLBasicId "std_logic"
+
-- Translate a Haskell type to a VHDL type
vhdl_ty :: Type.Type -> AST.TypeMark
vhdl_ty ty = Maybe.fromMaybe
projects / matthijs / master-project / cλash.git / blobdiff