-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 bind = findBind "half_adder" (cm_binds core)
- let NonRec var expr = bind
- let sess = VHDLSession 0 builtin_funcs
- let (sess', name, f) = mkHWFunction sess bind
- let sess = addFunc sess' name f
- liftIO $ putStr $ showSDoc $ ppr expr
- liftIO $ putStr "\n\n"
- liftIO $ putStr $ render $ ForSyDe.Backend.Ppr.ppr $ getArchitecture sess bind
- return expr
-
-printTarget (Target (TargetFile file (Just x)) obj Nothing) =
- print $ show file
-
-printBinds [] = putStr "done\n\n"
-printBinds (b:bs) = do
- printBind b
- putStr "\n"
- printBinds bs
-
-printBind (NonRec b expr) = do
- putStr "NonRec: "
- printBind' (b, expr)
-
-printBind (Rec binds) = do
- putStr "Rec: \n"
- foldl1 (>>) (map printBind' binds)
-
-printBind' (b, expr) = do
- putStr $ getOccString b
- --putStr $ showSDoc $ ppr expr
- putStr "\n"
-
-findBind :: String -> [CoreBind] -> CoreBind
-findBind 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.
- Maybe.fromJust . find (\b -> case b of
- Rec l -> False
- NonRec var _ -> lookfor == (occNameString $ nameOccName $ getName var)
- )
-
--- Accepts a port name and an argument to map to it.
--- Returns the appropriate line for in the port map
-getPortMapEntry binds (Port portname) (Var id) =
- (Just (AST.unsafeVHDLBasicId portname)) AST.:=>: (AST.ADName (AST.NSimple (AST.unsafeVHDLBasicId signalname)))
- where
- Port signalname = Maybe.fromMaybe
- (error $ "Argument " ++ getOccString id ++ "is unknown")
- (lookup id binds)
-
-getPortMapEntry binds _ a = error $ "Unsupported argument: " ++ (showSDoc $ ppr a)
-
-getInstantiations ::
- VHDLSession
- -> [PortNameMap] -- The arguments that need to be applied to the
- -- expression.
- -> PortNameMap -- The output ports that the expression should generate.
- -> [(CoreBndr, PortNameMap)] -- A list of bindings in effect
- -> CoreSyn.CoreExpr -- The expression to generate an architecture for
- -> [AST.ConcSm] -- The resulting VHDL code
-
--- A lambda expression binds the first argument (a) to the binder b.
-getInstantiations sess (a:as) outs binds (Lam b expr) =
- getInstantiations sess as outs ((b, a):binds) expr
-
--- A case expression that checks a single variable and has a single
--- alternative, can be used to take tuples apart
-getInstantiations sess args outs binds (Case (Var v) b _ [res]) =
- case altcon of
- DataAlt datacon ->
- if (DataCon.isTupleCon datacon) then
- getInstantiations sess args outs binds' expr
- else
- error "Data constructors other than tuples not supported"
- otherwise ->
- error "Case binders other than tuples not supported"
- where
- binds' = (zip bind_vars tuple_ports) ++ binds
- (altcon, bind_vars, expr) = res
- -- Find the portnamemaps for each of the tuple's elements
- Tuple tuple_ports = Maybe.fromMaybe
- (error $ "Case expression uses unknown scrutinee " ++ getOccString v)
- (lookup v binds)
-
--- An application is an instantiation of a component
-getInstantiations sess 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 sess 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
- hwfunc = Maybe.fromMaybe
- (error $ "Function " ++ compname ++ "is unknown")
- (lookup compname (funcs sess))
- HWFunction inports outport = hwfunc
- ports =
- zipWith (getPortMapEntry binds) inports fargs
- ++ mapOutputPorts outport outs
-
-getInstantiations sess 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")