- find (\b -> case b of
- Rec l -> False
- NonRec var _ -> lookfor == (occNameString $ nameOccName $ getName var)
- ) binds
-
-getPortMapEntry ::
- SignalNameMap -- The port name to bind to
- -> SignalNameMap
- -- The signal or port to bind to it
- -> AST.AssocElem -- The resulting port map entry
-
--- Accepts a port name and an argument to map to it.
--- Returns the appropriate line for in the port map
-getPortMapEntry (Single (portname, _)) (Single (signame, _)) =
- (Just portname) AST.:=>: (AST.ADName (AST.NSimple signame))
-expandExpr ::
- [(CoreBndr, SignalNameMap)]
- -- A list of bindings in effect
- -> CoreExpr -- The expression to expand
- -> VHDLState (
- [AST.SigDec], -- Needed signal declarations
- [AST.ConcSm], -- Needed component instantations and
- -- signal assignments.
- [SignalNameMap], -- The signal names corresponding to
- -- the expression's arguments
- SignalNameMap) -- The signal names corresponding to
- -- the expression's result.
-expandExpr binds lam@(Lam b expr) = do
- -- Generate a new signal to which we will expect this argument to be bound.
- signal_name <- uniqueName ("arg_" ++ getOccString b)
- -- Find the type of the binder
- let (arg_ty, _) = Type.splitFunTy (CoreUtils.exprType lam)
- -- Create signal names for the binder
- -- TODO: We assume arguments are ports here
- let arg_signal = getPortNameMapForTy signal_name arg_ty (useAsPort arg_ty)
- -- Create the corresponding signal declarations
- let signal_decls = mkSignalsFromMap arg_signal
- -- Add the binder to the list of binds
- let binds' = (b, arg_signal) : binds
- -- Expand the rest of the expression
- (signal_decls', statements', arg_signals', res_signal') <- expandExpr binds' expr
- -- Properly merge the results
- return (signal_decls ++ signal_decls',
- statements',
- arg_signal : arg_signals',
- res_signal')
-
-expandExpr binds (Var id) =
- return ([], [], [], bind)
- where
- -- Lookup the id in our binds map
- bind = Maybe.fromMaybe
- (error $ "Argument " ++ getOccString id ++ "is unknown")
- (lookup id binds)
-
-expandExpr binds l@(Let (NonRec b bexpr) expr) = do
- (signal_decls, statements, arg_signals, res_signals) <- expandExpr binds bexpr
- let binds' = (b, res_signals) : binds
- (signal_decls', statements', arg_signals', res_signals') <- expandExpr binds' expr
- return (
- signal_decls ++ signal_decls',
- statements ++ statements',
- arg_signals',
- res_signals')
-
-expandExpr binds app@(App _ _) = do
- -- Is this a data constructor application?
- case CoreUtils.exprIsConApp_maybe app of
- -- Is this a tuple construction?
- Just (dc, args) -> if DataCon.isTupleCon dc
- then
- expandBuildTupleExpr binds (dataConAppArgs dc args)
- else
- error "Data constructors other than tuples not supported"
- otherise ->
- -- Normal function application, should map to a component instantiation
- let ((Var f), args) = collectArgs app in
- expandApplicationExpr binds (CoreUtils.exprType app) f args
-
-expandExpr binds expr@(Case (Var v) b _ alts) =
- case alts of
- [alt] -> expandSingleAltCaseExpr binds v b alt
- otherwise -> error $ "Multiple alternative case expression not supported: " ++ (showSDoc $ ppr expr)
-
-expandExpr binds expr@(Case _ b _ _) =
- error $ "Case expression with non-variable scrutinee not supported: " ++ (showSDoc $ ppr expr)
-
-expandExpr binds expr =
- error $ "Unsupported expression: " ++ (showSDoc $ ppr $ expr)
-
--- Expands the construction of a tuple into VHDL
-expandBuildTupleExpr ::
- [(CoreBndr, SignalNameMap)]
- -- A list of bindings in effect
- -> [CoreExpr] -- A list of expressions to put in the tuple
- -> VHDLState ( [AST.SigDec], [AST.ConcSm], [SignalNameMap], SignalNameMap)
- -- See expandExpr
-expandBuildTupleExpr binds args = do
- -- Split the tuple constructor arguments into types and actual values.
- -- Expand each of the values in the tuple
- (signals_declss, statementss, arg_signalss, res_signals) <-
- (Monad.liftM List.unzip4) $ mapM (expandExpr binds) args
- if any (not . null) arg_signalss
- then error "Putting high order functions in tuples not supported"
- else
- return (
- concat signals_declss,
- concat statementss,
- [],
- Tuple res_signals)
-
--- Expands the most simple case expression that scrutinizes a plain variable
--- and has a single alternative. This simple form currently allows only for
--- unpacking tuple variables.
-expandSingleAltCaseExpr ::
- [(CoreBndr, SignalNameMap)]
- -- A list of bindings in effect
- -> Var.Var -- The scrutinee
- -> CoreBndr -- The binder to bind the scrutinee to
- -> CoreAlt -- The single alternative
- -> VHDLState ( [AST.SigDec], [AST.ConcSm], [SignalNameMap], SignalNameMap)
- -- See expandExpr
-
-expandSingleAltCaseExpr binds v b alt@(DataAlt datacon, bind_vars, expr) =
- if not (DataCon.isTupleCon datacon)
- then
- error $ "Dataconstructors other than tuple constructors not supported in case pattern of alternative: " ++ (showSDoc $ ppr alt)
- else
- let
- -- Lookup the scrutinee (which must be a variable bound to a tuple) in
- -- the existing bindings list and get the portname map for each of
- -- it's elements.
- Tuple tuple_ports = Maybe.fromMaybe
- (error $ "Case expression uses unknown scrutinee " ++ getOccString v)
- (lookup v binds)
- -- TODO include b in the binds list
- -- Merge our existing binds with the new binds.
- binds' = (zip bind_vars tuple_ports) ++ binds
- in
- -- Expand the expression with the new binds list
- expandExpr binds' expr
-
-expandSingleAltCaseExpr _ _ _ alt =
- error $ "Case patterns other than data constructors not supported in case alternative: " ++ (showSDoc $ ppr alt)
-
-
--- Expands the application of argument to a function into VHDL
-expandApplicationExpr ::
- [(CoreBndr, SignalNameMap)]
- -- A list of bindings in effect
- -> Type -- The result type of the function call
- -> Var.Var -- The function to call
- -> [CoreExpr] -- A list of argumetns to apply to the function
- -> VHDLState ( [AST.SigDec], [AST.ConcSm], [SignalNameMap], SignalNameMap)
- -- See expandExpr
-expandApplicationExpr binds ty f args = do
- let name = getOccString f
- -- Generate a unique name for the application
- appname <- uniqueName ("app_" ++ name)
- -- Lookup the hwfunction to instantiate
- HWFunction vhdl_id inports outport <- getHWFunc (appToHsFunction f args ty)
- -- Expand each of the args, so each of them is reduced to output signals
- (arg_signal_decls, arg_statements, arg_res_signals) <- expandArgs binds args
- -- Bind each of the input ports to the expanded arguments
- let inmaps = concat $ zipWith createAssocElems inports arg_res_signals
- -- Create signal names for our result
- -- TODO: We assume the result is a port here
- let res_signal = getPortNameMapForTy (appname ++ "_out") ty (useAsPort ty)
- -- Create the corresponding signal declarations
- let signal_decls = mkSignalsFromMap res_signal
- -- Bind each of the output ports to our output signals
- let outmaps = mapOutputPorts outport res_signal
- -- Instantiate the component
- let component = AST.CSISm $ AST.CompInsSm
- (AST.unsafeVHDLBasicId appname)
- (AST.IUEntity (AST.NSimple vhdl_id))
- (AST.PMapAspect (inmaps ++ outmaps))
- -- Merge the generated declarations
- return (
- signal_decls ++ arg_signal_decls,
- component : arg_statements,
- [], -- We don't take any extra arguments; we don't support higher order functions yet
- res_signal)
-
--- Creates a list of AssocElems (port map lines) that maps the given signals
--- to the given ports.
-createAssocElems ::
- SignalNameMap -- The port names to bind to
- -> SignalNameMap -- The signals to bind to it
- -> [AST.AssocElem] -- The resulting port map lines
-
-createAssocElems (Single (port_id, _)) (Single (signal_id, _)) =
- [(Just port_id) AST.:=>: (AST.ADName (AST.NSimple signal_id))]
-
-createAssocElems (Tuple ports) (Tuple signals) =
- concat $ zipWith createAssocElems ports signals
-
--- Generate a signal declaration for a signal with the given name and the
--- given type and no value. Also returns the id of the signal.
-mkSignal :: String -> AST.TypeMark -> (AST.VHDLId, AST.SigDec)
-mkSignal name ty =
- (id, mkSignalFromId id ty)
- where
- id = AST.unsafeVHDLBasicId name
-
-mkSignalFromId :: AST.VHDLId -> AST.TypeMark -> AST.SigDec
-mkSignalFromId id ty =
- AST.SigDec id ty Nothing
-
--- Generates signal declarations for all the signals in the given map
-mkSignalsFromMap ::
- SignalNameMap
- -> [AST.SigDec]
-
-mkSignalsFromMap (Single (id, ty)) =
- [mkSignalFromId id ty]
-
-mkSignalsFromMap (Tuple signals) =
- concat $ map mkSignalsFromMap signals
-
-expandArgs ::
- [(CoreBndr, SignalNameMap)] -- A list of bindings in effect
- -> [CoreExpr] -- The arguments to expand
- -> VHDLState ([AST.SigDec], [AST.ConcSm], [SignalNameMap])
- -- The resulting signal declarations,
- -- component instantiations and a
- -- VHDLName for each of the
- -- expressions passed in.
-expandArgs binds (e:exprs) = do
- -- Expand the first expression
- (signal_decls, statements, arg_signals, res_signal) <- expandExpr binds e
- if not (null arg_signals)
- then error $ "Passing functions as arguments not supported: " ++ (showSDoc $ ppr e)
- else do
- (signal_decls', statements', res_signals') <- expandArgs binds exprs
- return (
- signal_decls ++ signal_decls',
- statements ++ statements',
- res_signal : res_signals')
-
-expandArgs _ [] = return ([], [], [])
-
--- Extract the arguments from a data constructor application (that is, the
--- normal args, leaving out the type args).
-dataConAppArgs :: DataCon -> [CoreExpr] -> [CoreExpr]
-dataConAppArgs dc args =
- drop tycount args
- where
- tycount = length $ DataCon.dataConAllTyVars dc
-
-mapOutputPorts ::
- SignalNameMap -- The output portnames of the component
- -> SignalNameMap -- 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 (Single (portname, _)) (Single (signalname, _)) =
- [(Just portname) AST.:=>: (AST.ADName (AST.NSimple signalname))]
-
--- Map matching output ports in the tuple
-mapOutputPorts (Tuple ports) (Tuple signals) =
- concat (zipWith mapOutputPorts ports signals)
-
-expandBind ::
- CoreBind -- The binder to expand into VHDL
- -> VHDLState [AST.LibraryUnit] -- The resulting VHDL
-
-expandBind (Rec _) = error "Recursive binders not supported"
-
-expandBind 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
- arch <- getArchitecture hwfunc expr
- let entity = getEntity hwfunc
- return $ [
- AST.LUEntity entity,
- AST.LUArch arch ]
-
-getArchitecture ::
- HWFunction -- The function to generate an architecture for
- -> CoreExpr -- The expression that is bound to the function
- -> VHDLState AST.ArchBody -- The resulting architecture
-
-getArchitecture hwfunc expr = do
- -- Unpack our hwfunc
- let HWFunction vhdl_id inports outport = hwfunc
- -- Expand the expression into an architecture body
- (signal_decls, statements, arg_signals, res_signal) <- expandExpr [] expr
- let inport_assigns = concat $ zipWith createSignalAssignments arg_signals inports
- let outport_assigns = createSignalAssignments outport res_signal
- return $ AST.ArchBody
- (AST.unsafeVHDLBasicId "structural")
- (AST.NSimple vhdl_id)
- (map AST.BDISD signal_decls)
- (inport_assigns ++ outport_assigns ++ statements)
-
--- Generate a VHDL entity declaration for the given function
-getEntity :: HWFunction -> AST.EntityDec
-getEntity (HWFunction vhdl_id inports outport) =
- AST.EntityDec vhdl_id ports
- where
- ports =
- (concat $ map (mkIfaceSigDecs AST.In) inports)
- ++ mkIfaceSigDecs AST.Out outport
-
-mkIfaceSigDecs ::
- AST.Mode -- The port's mode (In or Out)
- -> SignalNameMap -- The ports to generate a map for
- -> [AST.IfaceSigDec] -- The resulting ports
-
-mkIfaceSigDecs mode (Single (port_id, ty)) =
- [AST.IfaceSigDec port_id mode ty]
-
-mkIfaceSigDecs mode (Tuple ports) =
- concat $ map (mkIfaceSigDecs mode) ports
-
--- Unused values (state) don't generate ports
-mkIfaceSigDecs mode Unused =
- []
-
--- Create concurrent assignments of one map of signals to another. The maps
--- should have a similar form.
-createSignalAssignments ::
- SignalNameMap -- The signals to assign to
- -> SignalNameMap -- The signals to assign
- -> [AST.ConcSm] -- The resulting assignments
-
--- A simple assignment of one signal to another (greatly complicated because
--- signal assignments can be conditional with multiple conditions in VHDL).
-createSignalAssignments (Single (dst, _)) (Single (src, _)) =
- [AST.CSSASm assign]
- where
- src_name = AST.NSimple src
- src_expr = AST.PrimName src_name
- src_wform = AST.Wform [AST.WformElem src_expr Nothing]
- dst_name = (AST.NSimple dst)
- assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
-
-createSignalAssignments (Tuple dsts) (Tuple srcs) =
- concat $ zipWith createSignalAssignments dsts srcs
-
-createSignalAssignments Unused (Single (src, _)) =
- -- Write state
- []
-
-createSignalAssignments (Single (src, _)) Unused =
- -- Read state
- []
-
-createSignalAssignments dst src =
- error $ "Non matching source and destination: " ++ show dst ++ " <= " ++ show src
-
-type SignalNameMap = HsValueMap (AST.VHDLId, AST.TypeMark)
-
--- | A datatype that maps each of the single values in a haskell structure to
--- a mapto. The map has the same structure as the haskell type mapped, ie
--- nested tuples etc.
-data HsValueMap mapto =
- Tuple [HsValueMap mapto]
- | Single mapto
- | Unused
- deriving (Show, Eq)
-
--- | Creates a HsValueMap with the same structure as the given type, using the
--- given function for mapping the single types.
-mkHsValueMap ::
- ((Type, s) -> (HsValueMap mapto, s))
- -- ^ A function to map single value Types
- -- (basically anything but tuples) to a
- -- HsValueMap (not limited to the Single
- -- constructor) Also accepts and produces a
- -- state that will be passed on between
- -- each call to the function.
- -> s -- ^ The initial state
- -> Type -- ^ The type to map to a HsValueMap
- -> (HsValueMap mapto, s) -- ^ The resulting map and state
-
-mkHsValueMap f s ty =
- case Type.splitTyConApp_maybe ty of
- Just (tycon, args) ->
- if (TyCon.isTupleTyCon tycon)
- then
- let (args', s') = mapTuple f s args in
- -- Handle tuple construction especially
- (Tuple args', s')
- else
- -- And let f handle the rest
- f (ty, s)
- -- And let f handle the rest
- Nothing -> f (ty, s)
- where
- mapTuple f s (ty:tys) =
- let (map, s') = mkHsValueMap f s ty in
- let (maps, s'') = mapTuple f s' tys in
- (map: maps, s'')
- mapTuple f s [] = ([], s)
-
--- Generate a port name map (or multiple for tuple types) in the given direction for
--- each type given.
-getPortNameMapForTys :: String -> Int -> [Type] -> [HsUseMap] -> [SignalNameMap]
-getPortNameMapForTys prefix num [] [] = []
-getPortNameMapForTys prefix num (t:ts) (u:us) =
- (getPortNameMapForTy (prefix ++ show num) t u) : getPortNameMapForTys prefix (num + 1) ts us
-
-getPortNameMapForTy :: String -> Type -> HsUseMap -> SignalNameMap
-getPortNameMapForTy name _ (Single (State _)) =
- Unused
-
-getPortNameMapForTy name ty use =
- if (TyCon.isTupleTyCon tycon) then
- let (Tuple uses) = use in
- -- Expand tuples we find
- Tuple (getPortNameMapForTys name 0 args uses)
- else -- Assume it's a type constructor application, ie simple data type
- Single ((AST.unsafeVHDLBasicId name), (vhdl_ty ty))
- where
- (tycon, args) = Type.splitTyConApp ty
-
-data HWFunction = HWFunction { -- A function that is available in hardware
- vhdlId :: AST.VHDLId,
- inPorts :: [SignalNameMap],
- outPort :: SignalNameMap
- --entity :: AST.EntityDec
-} deriving (Show)
-
--- Turns a CoreExpr describing a function into a description of its input and
--- output ports.
-mkHWFunction ::
- CoreBind -- The core binder to generate the interface for
- -> HsFunction -- The HsFunction describing the function
- -> VHDLState HWFunction -- The function interface
-
-mkHWFunction (NonRec var expr) hsfunc =
- return $ HWFunction (mkVHDLId name) inports outport
- where
- name = getOccString var
- ty = CoreUtils.exprType expr
- (args, res) = Type.splitFunTys ty
- inports = case args of
- -- Handle a single port specially, to prevent an extra 0 in the name
- [port] -> [getPortNameMapForTy "portin" port (head $ hsArgs hsfunc)]
- ps -> getPortNameMapForTys "portin" 0 ps (hsArgs hsfunc)
- outport = getPortNameMapForTy "portout" res (hsRes hsfunc)
-
-mkHWFunction (Rec _) _ =
- error "Recursive binders not supported"
-
--- | How is a given (single) value in a function's type (ie, argument or
--- return value) used?
-data HsValueUse =
- Port -- ^ Use it as a port (input or output)
- | State Int -- ^ Use it as state (input or output). The int is used to
- -- match input state to output state.
- deriving (Show, Eq)
-
-useAsPort :: Type -> HsUseMap
-useAsPort = fst . (mkHsValueMap (\(ty, s) -> (Single Port, s)) 0)
-useAsState :: Type -> HsUseMap
-useAsState = fst . (mkHsValueMap (\(ty, s) -> (Single $ State s, s + 1)) 0)
-
-type HsUseMap = HsValueMap HsValueUse
-
--- | This type describes a particular use of a Haskell function and is used to
--- look up an appropriate hardware description.
-data HsFunction = HsFunction {
- hsName :: String, -- ^ What was the name of the original Haskell function?
- hsArgs :: [HsUseMap], -- ^ How are the arguments used?
- hsRes :: HsUseMap -- ^ How is the result value used?
-} deriving (Show, Eq)
-
--- | Translate a function application to a HsFunction. i.e., which function
--- do you need to translate this function application.
-appToHsFunction ::
- Var.Var -- ^ The function to call
- -> [CoreExpr] -- ^ The function arguments
- -> Type -- ^ The return type
- -> HsFunction -- ^ The needed HsFunction
-
-appToHsFunction f args ty =
- HsFunction hsname hsargs hsres
- where
- hsargs = map (useAsPort . CoreUtils.exprType) args
- hsres = useAsPort ty
- hsname = getOccString f
+ find (\(var, _) -> lookfor == (occNameString $ nameOccName $ getName var)) binds
+
+-- | Flattens the given bind into the given signature and adds it to the
+-- session. Then (recursively) finds any functions it uses and does the same
+-- with them.
+-- flattenBind ::
+-- HsFunction -- The signature to flatten into
+-- -> (CoreBndr, CoreExpr) -- The bind to flatten
+-- -> TranslatorState ()
+--
+-- flattenBind hsfunc bind@(var, expr) = do
+-- -- Flatten the function
+-- let flatfunc = flattenFunction hsfunc bind
+-- -- Propagate state variables
+-- let flatfunc' = propagateState hsfunc flatfunc
+-- -- Store the flat function in the session
+-- modA tsFlatFuncs (Map.insert hsfunc flatfunc')
+-- -- Flatten any functions used
+-- let used_hsfuncs = Maybe.mapMaybe usedHsFunc (flat_defs flatfunc')
+-- mapM_ resolvFunc used_hsfuncs
+
+-- | Decide which incoming state variables will become state in the
+-- given function, and which will be propagate to other applied
+-- functions.
+-- propagateState ::
+-- HsFunction
+-- -> FlatFunction
+-- -> FlatFunction
+--
+-- propagateState hsfunc flatfunc =
+-- flatfunc {flat_defs = apps', flat_sigs = sigs'}
+-- where
+-- (olds, news) = unzip $ getStateSignals hsfunc flatfunc
+-- states' = zip olds news
+-- -- Find all signals used by all sigdefs
+-- uses = concatMap sigDefUses (flat_defs flatfunc)
+-- -- Find all signals that are used more than once (is there a
+-- -- prettier way to do this?)
+-- multiple_uses = uses List.\\ (List.nub uses)
+-- -- Find the states whose "old state" signal is used only once
+-- single_use_states = filter ((`notElem` multiple_uses) . fst) states'
+-- -- See if these single use states can be propagated
+-- (substate_sigss, apps') = unzip $ map (propagateState' single_use_states) (flat_defs flatfunc)
+-- substate_sigs = concat substate_sigss
+-- -- Mark any propagated state signals as SigSubState
+-- sigs' = map
+-- (\(id, info) -> (id, if id `elem` substate_sigs then info {sigUse = SigSubState} else info))
+-- (flat_sigs flatfunc)
+
+-- | Propagate the state into a single function application.
+-- propagateState' ::
+-- [(SignalId, SignalId)]
+-- -- ^ TODO
+-- -> SigDef -- ^ The SigDef to process.
+-- -> ([SignalId], SigDef)
+-- -- ^ Any signal ids that should become substates,
+-- -- and the resulting application.
+--
+-- propagateState' states def =
+-- if (is_FApp def) then
+-- (our_old ++ our_new, def {appFunc = hsfunc'})
+-- else
+-- ([], def)
+-- where
+-- hsfunc = appFunc def
+-- args = appArgs def
+-- res = appRes def
+-- our_states = filter our_state states
+-- -- A state signal belongs in this function if the old state is
+-- -- passed in, and the new state returned
+-- our_state (old, new) =
+-- any (old `Foldable.elem`) args
+-- && new `Foldable.elem` res
+-- (our_old, our_new) = unzip our_states
+-- -- Mark the result
+-- zipped_res = zipValueMaps res (hsFuncRes hsfunc)
+-- res' = fmap (mark_state (zip our_new [0..])) zipped_res
+-- -- Mark the args
+-- zipped_args = zipWith zipValueMaps args (hsFuncArgs hsfunc)
+-- args' = map (fmap (mark_state (zip our_old [0..]))) zipped_args
+-- hsfunc' = hsfunc {hsFuncArgs = args', hsFuncRes = res'}
+--
+-- mark_state :: [(SignalId, StateId)] -> (SignalId, HsValueUse) -> HsValueUse
+-- mark_state states (id, use) =
+-- case lookup id states of
+-- Nothing -> use
+-- Just state_id -> State state_id
+
+-- | Returns pairs of signals that should be mapped to state in this function.
+-- getStateSignals ::
+-- HsFunction -- | The function to look at
+-- -> FlatFunction -- | The function to look at
+-- -> [(SignalId, SignalId)]
+-- -- | TODO The state signals. The first is the state number, the second the
+-- -- signal to assign the current state to, the last is the signal
+-- -- that holds the new state.
+--
+-- getStateSignals hsfunc flatfunc =
+-- [(old_id, new_id)
+-- | (old_num, old_id) <- args
+-- , (new_num, new_id) <- res
+-- , old_num == new_num]
+-- where
+-- sigs = flat_sigs flatfunc
+-- -- Translate args and res to lists of (statenum, sigid)
+-- args = concat $ zipWith stateList (hsFuncArgs hsfunc) (flat_args flatfunc)
+-- res = stateList (hsFuncRes hsfunc) (flat_res flatfunc)
+
+-- | 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
+-- -> TranslatorState ()
+--
+-- resolvFunc hsfunc = do
+-- flatfuncmap <- getA tsFlatFuncs
+-- -- Don't do anything if there is already a flat function for this hsfunc or
+-- -- when it is a builtin function.
+-- Monad.unless (Map.member hsfunc flatfuncmap) $ do
+-- -- Not working with new builtins -- Monad.unless (elem hsfunc VHDL.builtin_hsfuncs) $ do
+-- -- New function, resolve it
+-- core <- getA tsCoreModule
+-- -- Find the named function
+-- let name = (hsFuncName hsfunc)
+-- let bind = findBind (CoreSyn.flattenBinds $ cm_binds core) name
+-- case bind of
+-- Nothing -> error $ "Couldn't find function " ++ name ++ " in current module."
+-- Just b -> flattenBind hsfunc b