--- An application is an instantiation of a component
-getInstantiations args outs binds app@(App expr arg) =
- if isTupleConstructor f then
- let
- Tuple outports = outs
- (tys, vals) = splitTupleConstructorArgs fargs
- in
- concat $ zipWith
- (\outs' expr' -> getInstantiations args outs' binds expr')
- outports vals
- else
- [AST.CSISm comp]
- where
- ((Var f), fargs) = collectArgs app
- comp = AST.CompInsSm
- (AST.unsafeVHDLBasicId "app")
- (AST.IUEntity (AST.NSimple (AST.unsafeVHDLBasicId compname)))
- (AST.PMapAspect ports)
- compname = getOccString f
- ports =
- zipWith (getPortMapEntry binds) ["portin0", "portin1"] fargs
- ++ mapOutputPorts (Port "portout") outs
-
-getInstantiations args outs binds expr =
- error $ "Unsupported expression" ++ (showSDoc $ ppr $ expr)
-
--- Is the given name a (binary) tuple constructor
-isTupleConstructor :: Var.Var -> Bool
-isTupleConstructor var =
- Name.isWiredInName name
- && Name.nameModule name == tuple_mod
- && (Name.occNameString $ Name.nameOccName name) == "(,)"
- where
- name = Var.varName var
- mod = nameModule name
- tuple_mod = Module.mkModule (Module.stringToPackageId "ghc-prim") (Module.mkModuleName "GHC.Tuple")
-
--- Split arguments into type arguments and value arguments This is probably
--- not really sufficient (not sure if Types can actually occur as value
--- arguments...)
-splitTupleConstructorArgs :: [CoreExpr] -> ([CoreExpr], [CoreExpr])
-splitTupleConstructorArgs (e:es) =
- case e of
- Type t -> (e:tys, vals)
- otherwise -> (tys, e:vals)
- where
- (tys, vals) = splitTupleConstructorArgs es
-
-mapOutputPorts ::
- PortNameMap -- The output portnames of the component
- -> PortNameMap -- The output portnames and/or signals to map these to
- -> [AST.AssocElem] -- The resulting output ports
-
--- Map the output port of a component to the output port of the containing
--- entity.
-mapOutputPorts (Port portname) (Port signalname) =
- [(Just (AST.unsafeVHDLBasicId portname)) AST.:=>: (AST.ADName (AST.NSimple (AST.unsafeVHDLBasicId signalname)))]
-
--- Map matching output ports in the tuple
-mapOutputPorts (Tuple ports) (Tuple signals) =
- concat (zipWith mapOutputPorts ports signals)
-
-getArchitecture ::
- CoreBind -- The binder to expand into an architecture
- -> AST.ArchBody -- The resulting architecture
-
-getArchitecture (Rec _) = error "Recursive binders not supported"
-
-getArchitecture (NonRec var expr) =
- AST.ArchBody
- (AST.unsafeVHDLBasicId "structural")
- -- Use unsafe for now, to prevent pulling in ForSyDe error handling
- (AST.NSimple (AST.unsafeVHDLBasicId name))
- []
- (getInstantiations (Args inportnames) outport [] expr)
- where
- name = (getOccString var)
- ty = CoreUtils.exprType expr
- (fargs, res) = Type.splitFunTys ty
- --state = if length fargs == 1 then () else (last fargs)
- ports = if length fargs == 1 then fargs else (init fargs)
- inportnames = case ports of
- [port] -> [getPortNameMapForTy "portin" port]
- ps -> getPortNameMapForTys "portin" 0 ps
- outport = getPortNameMapForTy "portout" res
-
-data PortNameMap =
- Args [PortNameMap] -- Each of the submaps represent an argument to the
- -- function. Should only occur at top level.
- | Tuple [PortNameMap]
- | Port String
-
--- Generate a port name map (or multiple for tuple types) in the given direction for
--- each type given.
-getPortNameMapForTys :: String -> Int -> [Type] -> [PortNameMap]
-getPortNameMapForTys prefix num [] = []
-getPortNameMapForTys prefix num (t:ts) =
- (getPortNameMapForTy (prefix ++ show num) t) : getPortNameMapForTys prefix (num + 1) ts
-
-getPortNameMapForTy :: String -> Type -> PortNameMap
-getPortNameMapForTy name ty =
- if (TyCon.isTupleTyCon tycon) then
- -- Expand tuples we find
- Tuple (getPortNameMapForTys name 0 args)
- else -- Assume it's a type constructor application, ie simple data type
- -- TODO: Add type?
- Port name
- where
- (tycon, args) = Type.splitTyConApp ty
+main =
+ do
+ defaultErrorHandler defaultDynFlags $ do
+ runGhc (Just libdir) $ do
+ dflags <- getSessionDynFlags
+ setSessionDynFlags dflags
+ --target <- guessTarget "adder.hs" Nothing
+ --liftIO (print (showSDoc (ppr (target))))
+ --liftIO $ printTarget target
+ --setTargets [target]
+ --load LoadAllTargets
+ --core <- GHC.compileToCoreSimplified "Adders.hs"
+ core <- GHC.compileToCoreSimplified "Adders.hs"
+ --liftIO $ printBinds (cm_binds core)
+ let binds = Maybe.mapMaybe (findBind (cm_binds core)) ["sfull_adder"]
+ liftIO $ putStr $ prettyShow binds
+ -- Turn bind into VHDL
+ let (vhdl, sess) = State.runState (mkVHDL binds) (VHDLSession core 0 [])
+ liftIO $ putStr $ render $ ForSyDe.Backend.Ppr.ppr vhdl
+ liftIO $ ForSyDe.Backend.VHDL.FileIO.writeDesignFile vhdl "../vhdl/vhdl/output.vhdl"
+ liftIO $ putStr $ "\n\nFinal session:\n" ++ prettyShow sess ++ "\n\n"
+ return ()
+ where
+ -- Turns the given bind into VHDL
+ mkVHDL binds = do
+ -- Add the builtin functions
+ --mapM (uncurry addFunc) builtin_funcs
+ -- Create entities and architectures for them
+ mapM flattenBind binds
+ return $ AST.DesignFile
+ []
+ []
+
+findBind :: [CoreBind] -> String -> Maybe CoreBind
+findBind binds lookfor =
+ -- This ignores Recs and compares the name of the bind with lookfor,
+ -- disregarding any namespaces in OccName and extra attributes in Name and
+ -- Var.
+ find (\b -> case b of
+ Rec l -> False
+ NonRec var _ -> lookfor == (occNameString $ nameOccName $ getName var)
+ ) binds
+
+-- | Flattens the given bind and adds it to the session. Then (recursively)
+-- finds any functions it uses and does the same with them.
+flattenBind ::
+ CoreBind -- The binder to flatten
+ -> VHDLState ()
+
+flattenBind (Rec _) = error "Recursive binders not supported"
+
+flattenBind bind@(NonRec var expr) = do
+ -- Create the function signature
+ let ty = CoreUtils.exprType expr
+ let hsfunc = mkHsFunction var ty
+ --hwfunc <- mkHWFunction bind hsfunc
+ -- Add it to the session
+ --addFunc hsfunc hwfunc
+ let flatfunc = flattenFunction hsfunc bind
+ addFunc hsfunc flatfunc
+ let used_hsfuncs = map appFunc (apps flatfunc)
+ State.mapM resolvFunc used_hsfuncs
+ return ()
+
+-- | Find the given function, flatten it and add it to the session. Then
+-- (recursively) do the same for any functions used.
+resolvFunc ::
+ HsFunction -- | The function to look for
+ -> VHDLState ()
+
+resolvFunc hsfunc =
+ return ()
+
+-- | Translate a top level function declaration to a HsFunction. i.e., which
+-- interface will be provided by this function. This function essentially
+-- defines the "calling convention" for hardware models.
+mkHsFunction ::
+ Var.Var -- ^ The function defined
+ -> Type -- ^ The function type (including arguments!)
+ -> HsFunction -- ^ The resulting HsFunction
+
+mkHsFunction f ty =
+ HsFunction hsname hsargs hsres
+ where
+ hsname = getOccString f
+ (arg_tys, res_ty) = Type.splitFunTys ty
+ -- The last argument must be state
+ state_ty = last arg_tys
+ state = useAsState (mkHsValueMap state_ty)
+ -- All but the last argument are inports
+ inports = map (useAsPort . mkHsValueMap)(init arg_tys)
+ hsargs = inports ++ [state]
+ hsres = case splitTupleType res_ty of
+ -- Result type must be a two tuple (state, ports)
+ Just [outstate_ty, outport_ty] -> if Type.coreEqType state_ty outstate_ty
+ then
+ Tuple [state, useAsPort (mkHsValueMap outport_ty)]
+ else
+ error $ "Input state type of function " ++ hsname ++ ": " ++ (showSDoc $ ppr state_ty) ++ " does not match output state type: " ++ (showSDoc $ ppr outstate_ty)
+ otherwise -> error $ "Return type of top-level function " ++ hsname ++ " must be a two-tuple containing a state and output ports."
+
+-- | Splits a tuple type into a list of element types, or Nothing if the type
+-- is not a tuple type.
+splitTupleType ::
+ Type -- ^ The type to split
+ -> Maybe [Type] -- ^ The tuples element types
+
+splitTupleType ty =
+ case Type.splitTyConApp_maybe ty of
+ Just (tycon, args) -> if TyCon.isTupleTyCon tycon
+ then
+ Just args
+ else
+ Nothing
+ Nothing -> Nothing
+
+-- vim: set ts=8 sw=2 sts=2 expandtab: