X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=Translator.hs;h=260b1cdf5061a5e57b0553ed1ffebd0e1c7e9217;hb=b8c1e8554ba8aee73bc9d9a54bb3cb32f7930957;hp=d2df5ff34a4d90b9646b7416f57a5bcb3611ea7d;hpb=0c02bf89b75f30f8415bd0359934aba120eda2b5;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git diff --git a/Translator.hs b/Translator.hs index d2df5ff..260b1cd 100644 --- a/Translator.hs +++ b/Translator.hs @@ -1,22 +1,35 @@ -module Main(main) where -import GHC +module Translator where +import qualified Directory +import qualified System.FilePath as FilePath +import qualified List +import Debug.Trace +import qualified Control.Arrow as Arrow +import GHC hiding (loadModule, sigName) import CoreSyn import qualified CoreUtils import qualified Var import qualified Type import qualified TyCon import qualified DataCon +import qualified HscMain +import qualified SrcLoc +import qualified FastString import qualified Maybe import qualified Module -import qualified Control.Monad.State as State +import qualified Data.Foldable as Foldable +import qualified Control.Monad.Trans.State as State import Name +import qualified Data.Map as Map +import Data.Accessor import Data.Generics import NameEnv ( lookupNameEnv ) +import qualified HscTypes import HscTypes ( cm_binds, cm_types ) import MonadUtils ( liftIO ) -import Outputable ( showSDoc, ppr ) +import Outputable ( showSDoc, ppr, showSDocDebug ) import GHC.Paths ( libdir ) import DynFlags ( defaultDynFlags ) +import qualified UniqSupply import List ( find ) import qualified List import qualified Monad @@ -24,536 +37,336 @@ import qualified Monad -- The following modules come from the ForSyDe project. They are really -- internal modules, so ForSyDe.cabal has to be modified prior to installing -- ForSyDe to get access to these modules. -import qualified ForSyDe.Backend.VHDL.AST as AST -import qualified ForSyDe.Backend.VHDL.Ppr -import qualified ForSyDe.Backend.VHDL.FileIO -import qualified ForSyDe.Backend.Ppr +import qualified Language.VHDL.AST as AST +import qualified Language.VHDL.FileIO +import qualified Language.VHDL.Ppr as Ppr -- This is needed for rendering the pretty printed VHDL import Text.PrettyPrint.HughesPJ (render) -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)) ["full_adder", "half_adder"] - liftIO $ printBinds binds - -- Turn bind into VHDL - let vhdl = State.evalState (mkVHDL binds) (VHDLSession 0 []) - liftIO $ putStr $ render $ ForSyDe.Backend.Ppr.ppr vhdl - liftIO $ ForSyDe.Backend.VHDL.FileIO.writeDesignFile vhdl "../vhdl/vhdl/output.vhdl" - return () - where - -- Turns the given bind into VHDL - mkVHDL binds = do - -- Add the builtin functions - mapM (uncurry addFunc) builtin_funcs - -- Get the function signatures - funcs <- mapM mkHWFunction binds - -- Add them to the session - mapM (uncurry addFunc) funcs - let entities = map getEntity (snd $ unzip funcs) - -- Create architectures for them - archs <- mapM getArchitecture binds - return $ AST.DesignFile - [] - ((map AST.LUEntity entities) ++ (map AST.LUArch archs)) - -printTarget (Target (TargetFile file (Just x)) obj Nothing) = - print $ show file - -printBinds [] = putStr "done\n\n" -printBinds (b:bs) = do - printBind b +import TranslatorTypes +import HsValueMap +import Pretty +import Normalize +-- import Flatten +-- import FlattenTypes +import VHDLTypes +import qualified VHDL + +makeVHDL :: String -> String -> Bool -> IO () +makeVHDL filename name stateful = do + -- Load the module + (core, env) <- loadModule filename + -- Translate to VHDL + vhdl <- moduleToVHDL env core [(name, stateful)] + -- Write VHDL to file + let dir = "./vhdl/" ++ name ++ "/" + prepareDir dir + mapM (writeVHDL dir) vhdl + return () + +listBindings :: String -> IO [()] +listBindings filename = do + (core, env) <- loadModule filename + let binds = CoreSyn.flattenBinds $ cm_binds core + mapM (listBinding) binds + +listBinding :: (CoreBndr, CoreExpr) -> IO () +listBinding (b, e) = do + putStr "\nBinder: " + putStr $ show b + putStr "\nExpression: \n" + putStr $ prettyShow e + putStr "\n\n" + putStr $ showSDoc $ ppr e + putStr "\n\n" + putStr $ showSDoc $ ppr $ CoreUtils.exprType e + putStr "\n\n" + +-- | Show the core structure of the given binds in the given file. +listBind :: String -> String -> IO () +listBind filename name = do + (core, env) <- loadModule filename + let [(b, expr)] = findBinds core [name] 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 $ prettyShow expr + putStr "\n\n" putStr $ showSDoc $ ppr expr - putStr "\n" + putStr "\n\n" + putStr $ showSDoc $ ppr $ CoreUtils.exprType expr + putStr "\n\n" + +-- | Translate the binds with the given names from the given core module to +-- VHDL. The Bool in the tuple makes the function stateful (True) or +-- stateless (False). +moduleToVHDL :: HscTypes.HscEnv -> HscTypes.CoreModule -> [(String, Bool)] -> IO [(AST.VHDLId, AST.DesignFile)] +moduleToVHDL env core list = do + let (names, statefuls) = unzip list + let binds = map fst $ findBinds core names + -- Generate a UniqSupply + -- Running + -- egrep -r "(initTcRnIf|mkSplitUniqSupply)" . + -- on the compiler dir of ghc suggests that 'z' is not used to generate a + -- unique supply anywhere. + uniqSupply <- UniqSupply.mkSplitUniqSupply 'z' + -- Turn bind into VHDL + let all_bindings = (CoreSyn.flattenBinds $ cm_binds core) + let (normalized_bindings, typestate) = normalizeModule env uniqSupply all_bindings binds statefuls + let vhdl = VHDL.createDesignFiles typestate normalized_bindings + mapM (putStr . render . Ppr.ppr . snd) vhdl + --putStr $ "\n\nFinal session:\n" ++ prettyShow sess ++ "\n\n" + return vhdl + where -findBind :: [CoreBind] -> String -> Maybe CoreBind +-- | Prepares the directory for writing VHDL files. This means creating the +-- dir if it does not exist and removing all existing .vhdl files from it. +prepareDir :: String -> IO() +prepareDir dir = do + -- Create the dir if needed + exists <- Directory.doesDirectoryExist dir + Monad.unless exists $ Directory.createDirectory dir + -- Find all .vhdl files in the directory + files <- Directory.getDirectoryContents dir + let to_remove = filter ((==".vhdl") . FilePath.takeExtension) files + -- Prepend the dirname to the filenames + let abs_to_remove = map (FilePath.combine dir) to_remove + -- Remove the files + mapM_ Directory.removeFile abs_to_remove + +-- | Write the given design file to a file with the given name inside the +-- given dir +writeVHDL :: String -> (AST.VHDLId, AST.DesignFile) -> IO () +writeVHDL dir (name, vhdl) = do + -- Find the filename + let fname = dir ++ (AST.fromVHDLId name) ++ ".vhdl" + -- Write the file + Language.VHDL.FileIO.writeDesignFile vhdl fname + +-- | Loads the given file and turns it into a core module. +loadModule :: String -> IO (HscTypes.CoreModule, HscTypes.HscEnv) +loadModule filename = + 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.compileToCoreModule filename + env <- GHC.getSession + return (core, env) + +-- | Extracts the named binds from the given module. +findBinds :: HscTypes.CoreModule -> [String] -> [(CoreBndr, CoreExpr)] +findBinds core names = Maybe.mapMaybe (findBind (CoreSyn.flattenBinds $ cm_binds core)) names + +-- | Extract a named bind from the given list of binds +findBind :: [(CoreBndr, CoreExpr)] -> String -> Maybe (CoreBndr, CoreExpr) 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 - -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 - let arg_signal = getPortNameMapForTy ("xxx") 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 ([], [], [], Single (signal_id, ty)) - where - -- Lookup the id in our binds map - Single (signal_id, ty) = 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 (HsFunction name [] (Tuple [])) - -- 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 - let res_signal = getPortNameMapForTy (appname ++ "_out") 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) - -getArchitecture :: - CoreBind -- The binder to expand into an architecture - -> VHDLState AST.ArchBody -- The resulting architecture - -getArchitecture (Rec _) = error "Recursive binders not supported" - -getArchitecture (NonRec var expr) = do - let name = (getOccString var) - HWFunction vhdl_id inports outport <- getHWFunc (HsFunction name [] (Tuple [])) - sess <- State.get - (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 - --- 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 dst src = - error $ "Non matching source and destination: " ++ show dst ++ "\nand\n" ++ 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 - deriving (Show, Eq) - --- Generate a port name map (or multiple for tuple types) in the given direction for --- each type given. -getPortNameMapForTys :: String -> Int -> [Type] -> [SignalNameMap] -getPortNameMapForTys prefix num [] = [] -getPortNameMapForTys prefix num (t:ts) = - (getPortNameMapForTy (prefix ++ show num) t) : getPortNameMapForTys prefix (num + 1) ts - -getPortNameMapForTy :: String -> Type -> SignalNameMap -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 - 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 - -> VHDLState (HsFunction, HWFunction) -- The name of the function and its interface - -mkHWFunction (NonRec var expr) = - return (hsfunc, HWFunction (mkVHDLId name) inports outport) - where - name = getOccString var - ty = CoreUtils.exprType expr - (fargs, res) = Type.splitFunTys ty - args = if length fargs == 1 then fargs else (init fargs) - --state = if length fargs == 1 then () else (last fargs) - inports = case args of - -- Handle a single port specially, to prevent an extra 0 in the name - [port] -> [getPortNameMapForTy "portin" port] - ps -> getPortNameMapForTys "portin" 0 ps - outport = getPortNameMapForTy "portout" res - hsfunc = HsFunction name [] (Tuple []) - -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) - deriving (Show, Eq) - --- | 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 :: [HsValueMap HsValueUse], -- ^ How are the arguments used? - hsRes :: HsValueMap HsValueUse -- ^ How is the result value used? -} deriving (Show, Eq) - -data VHDLSession = VHDLSession { - nameCount :: Int, -- A counter that can be used to generate unique names - funcs :: [(HsFunction, HWFunction)] -- All functions available -} deriving (Show) - -type VHDLState = State.State VHDLSession - --- Add the function to the session -addFunc :: HsFunction -> HWFunction -> VHDLState () -addFunc hsfunc hwfunc = do - fs <- State.gets funcs -- Get the funcs element from the session - State.modify (\x -> x {funcs = (hsfunc, hwfunc) : fs }) -- Prepend name and f - --- Lookup the function with the given name in the current session. Errors if --- it was not found. -getHWFunc :: HsFunction -> VHDLState HWFunction -getHWFunc hsfunc = do - fs <- State.gets funcs -- Get the funcs element from the session - return $ Maybe.fromMaybe - (error $ "Function " ++ (hsName hsfunc) ++ "is unknown? This should not happen!") - (lookup hsfunc fs) - --- Makes the given name unique by appending a unique number. --- This does not do any checking against existing names, so it only guarantees --- uniqueness with other names generated by uniqueName. -uniqueName :: String -> VHDLState String -uniqueName name = do - count <- State.gets nameCount -- Get the funcs element from the session - State.modify (\s -> s {nameCount = count + 1}) - return $ name ++ "_" ++ (show count) - --- Shortcut -mkVHDLId :: String -> AST.VHDLId -mkVHDLId = AST.unsafeVHDLBasicId - -builtin_funcs = - [ - (HsFunction "hwxor" [] (Tuple []), HWFunction (mkVHDLId "hwxor") [Single (mkVHDLId "a", vhdl_bit_ty), Single (mkVHDLId "b", vhdl_bit_ty)] (Single (mkVHDLId "o", vhdl_bit_ty))), - (HsFunction "hwand" [] (Tuple []), HWFunction (mkVHDLId "hwand") [Single (mkVHDLId "a", vhdl_bit_ty), Single (mkVHDLId "b", vhdl_bit_ty)] (Single (mkVHDLId "o", vhdl_bit_ty))), - (HsFunction "hwor" [] (Tuple []), HWFunction (mkVHDLId "hwor") [Single (mkVHDLId "a", vhdl_bit_ty), Single (mkVHDLId "b", vhdl_bit_ty)] (Single (mkVHDLId "o", vhdl_bit_ty))), - (HsFunction "hwnot" [] (Tuple []), HWFunction (mkVHDLId "hwnot") [Single (mkVHDLId "i", vhdl_bit_ty)] (Single (mkVHDLId "o", vhdl_bit_ty))) - ] - -vhdl_bit_ty :: AST.TypeMark -vhdl_bit_ty = AST.unsafeVHDLBasicId "Bit" - --- Translate a Haskell type to a VHDL type -vhdl_ty :: Type -> AST.TypeMark -vhdl_ty ty = Maybe.fromMaybe - (error $ "Unsupported Haskell type: " ++ (showSDoc $ ppr ty)) - (vhdl_ty_maybe ty) - --- Translate a Haskell type to a VHDL type -vhdl_ty_maybe :: Type -> Maybe AST.TypeMark -vhdl_ty_maybe ty = - case Type.splitTyConApp_maybe ty of - Just (tycon, args) -> - let name = TyCon.tyConName tycon in - -- TODO: Do something more robust than string matching - case getOccString name of - "Bit" -> Just vhdl_bit_ty - otherwise -> Nothing - otherwise -> Nothing + 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 + +-- | 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!) +-- -> Bool -- ^ Is this a stateful function? +-- -> HsFunction -- ^ The resulting HsFunction +-- +-- mkHsFunction f ty stateful= +-- HsFunction hsname hsargs hsres +-- where +-- hsname = getOccString f +-- (arg_tys, res_ty) = Type.splitFunTys ty +-- (hsargs, hsres) = +-- if stateful +-- then +-- let +-- -- 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." +-- in +-- (hsargs, hsres) +-- else +-- -- Just use everything as a port +-- (map (useAsPort . mkHsValueMap) arg_tys, useAsPort $ mkHsValueMap res_ty) + +-- | Adds signal names to the given FlatFunction +-- nameFlatFunction :: +-- FlatFunction +-- -> FlatFunction +-- +-- nameFlatFunction flatfunc = +-- -- Name the signals +-- let +-- s = flat_sigs flatfunc +-- s' = map nameSignal s in +-- flatfunc { flat_sigs = s' } +-- where +-- nameSignal :: (SignalId, SignalInfo) -> (SignalId, SignalInfo) +-- nameSignal (id, info) = +-- let hints = nameHints info in +-- let parts = ("sig" : hints) ++ [show id] in +-- let name = concat $ List.intersperse "_" parts in +-- (id, info {sigName = Just name}) +-- +-- -- | 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: