1 module Translator where
2 import GHC hiding (loadModule, sigName)
4 import qualified CoreUtils
8 import qualified DataCon
10 import qualified Module
11 import qualified Control.Monad.State as State
13 import qualified Data.Map as Map
15 import NameEnv ( lookupNameEnv )
16 import qualified HscTypes
17 import HscTypes ( cm_binds, cm_types )
18 import MonadUtils ( liftIO )
19 import Outputable ( showSDoc, ppr )
20 import GHC.Paths ( libdir )
21 import DynFlags ( defaultDynFlags )
24 import qualified Monad
26 -- The following modules come from the ForSyDe project. They are really
27 -- internal modules, so ForSyDe.cabal has to be modified prior to installing
28 -- ForSyDe to get access to these modules.
29 import qualified ForSyDe.Backend.VHDL.AST as AST
30 import qualified ForSyDe.Backend.VHDL.Ppr
31 import qualified ForSyDe.Backend.VHDL.FileIO
32 import qualified ForSyDe.Backend.Ppr
33 -- This is needed for rendering the pretty printed VHDL
34 import Text.PrettyPrint.HughesPJ (render)
36 import TranslatorTypes
45 makeVHDL "Alu.hs" "register_bank" True
47 makeVHDL :: String -> String -> Bool -> IO ()
48 makeVHDL filename name stateful = do
50 core <- loadModule filename
52 vhdl <- moduleToVHDL core [(name, stateful)]
54 mapM (writeVHDL "../vhdl/vhdl/") vhdl
57 -- | Show the core structure of the given binds in the given file.
58 listBind :: String -> String -> IO ()
59 listBind filename name = do
60 core <- loadModule filename
61 let binds = findBinds core [name]
63 putStr $ prettyShow binds
65 putStr $ showSDoc $ ppr binds
68 -- | Translate the binds with the given names from the given core module to
69 -- VHDL. The Bool in the tuple makes the function stateful (True) or
71 moduleToVHDL :: HscTypes.CoreModule -> [(String, Bool)] -> IO [AST.DesignFile]
72 moduleToVHDL core list = do
73 let (names, statefuls) = unzip list
74 --liftIO $ putStr $ prettyShow (cm_binds core)
75 let binds = findBinds core names
76 --putStr $ prettyShow binds
77 -- Turn bind into VHDL
78 let (vhdl, sess) = State.runState (mkVHDL binds statefuls) (VHDLSession core 0 Map.empty)
79 mapM (putStr . render . ForSyDe.Backend.Ppr.ppr) vhdl
80 putStr $ "\n\nFinal session:\n" ++ prettyShow sess ++ "\n\n"
84 -- Turns the given bind into VHDL
85 mkVHDL binds statefuls = do
86 -- Add the builtin functions
87 mapM addBuiltIn builtin_funcs
88 -- Create entities and architectures for them
89 Monad.zipWithM processBind statefuls binds
90 modFuncs nameFlatFunction
91 modFuncs VHDL.createEntity
92 modFuncs VHDL.createArchitecture
95 -- | Write the given design file to a file inside the given dir
96 -- The first library unit in the designfile must be an entity, whose name
97 -- will be used as a filename.
98 writeVHDL :: String -> AST.DesignFile -> IO ()
99 writeVHDL dir vhdl = do
100 let AST.DesignFile _ (u:us) = vhdl
101 let AST.LUEntity (AST.EntityDec id _) = u
102 let fname = dir ++ AST.fromVHDLId id ++ ".vhdl"
103 ForSyDe.Backend.VHDL.FileIO.writeDesignFile vhdl fname
105 -- | Loads the given file and turns it into a core module.
106 loadModule :: String -> IO HscTypes.CoreModule
107 loadModule filename =
108 defaultErrorHandler defaultDynFlags $ do
109 runGhc (Just libdir) $ do
110 dflags <- getSessionDynFlags
111 setSessionDynFlags dflags
112 --target <- guessTarget "adder.hs" Nothing
113 --liftIO (print (showSDoc (ppr (target))))
114 --liftIO $ printTarget target
115 --setTargets [target]
116 --load LoadAllTargets
117 --core <- GHC.compileToCoreSimplified "Adders.hs"
118 core <- GHC.compileToCoreSimplified filename
121 -- | Extracts the named binds from the given module.
122 findBinds :: HscTypes.CoreModule -> [String] -> [CoreBind]
123 findBinds core names = Maybe.mapMaybe (findBind (cm_binds core)) names
125 -- | Extract a named bind from the given list of binds
126 findBind :: [CoreBind] -> String -> Maybe CoreBind
127 findBind binds lookfor =
128 -- This ignores Recs and compares the name of the bind with lookfor,
129 -- disregarding any namespaces in OccName and extra attributes in Name and
131 find (\b -> case b of
133 NonRec var _ -> lookfor == (occNameString $ nameOccName $ getName var)
136 -- | Processes the given bind as a top level bind.
138 Bool -- ^ Should this be stateful function?
139 -> CoreBind -- ^ The bind to process
142 processBind _ (Rec _) = error "Recursive binders not supported"
143 processBind stateful bind@(NonRec var expr) = do
144 -- Create the function signature
145 let ty = CoreUtils.exprType expr
146 let hsfunc = mkHsFunction var ty stateful
147 flattenBind hsfunc bind
149 -- | Flattens the given bind into the given signature and adds it to the
150 -- session. Then (recursively) finds any functions it uses and does the same
153 HsFunction -- The signature to flatten into
154 -> CoreBind -- The bind to flatten
157 flattenBind _ (Rec _) = error "Recursive binders not supported"
159 flattenBind hsfunc bind@(NonRec var expr) = do
160 -- Flatten the function
161 let flatfunc = flattenFunction hsfunc bind
163 setFlatFunc hsfunc flatfunc
164 let used_hsfuncs = Maybe.mapMaybe usedHsFunc (flat_defs flatfunc)
165 State.mapM resolvFunc used_hsfuncs
168 -- | Find the given function, flatten it and add it to the session. Then
169 -- (recursively) do the same for any functions used.
171 HsFunction -- | The function to look for
174 resolvFunc hsfunc = do
175 -- See if the function is already known
176 func <- getFunc hsfunc
178 -- Already known, do nothing
181 -- New function, resolve it
183 -- Get the current module
185 -- Find the named function
186 let bind = findBind (cm_binds core) name
188 Nothing -> error $ "Couldn't find function " ++ name ++ " in current module."
189 Just b -> flattenBind hsfunc b
191 name = hsFuncName hsfunc
193 -- | Translate a top level function declaration to a HsFunction. i.e., which
194 -- interface will be provided by this function. This function essentially
195 -- defines the "calling convention" for hardware models.
197 Var.Var -- ^ The function defined
198 -> Type -- ^ The function type (including arguments!)
199 -> Bool -- ^ Is this a stateful function?
200 -> HsFunction -- ^ The resulting HsFunction
202 mkHsFunction f ty stateful=
203 HsFunction hsname hsargs hsres
205 hsname = getOccString f
206 (arg_tys, res_ty) = Type.splitFunTys ty
211 -- The last argument must be state
212 state_ty = last arg_tys
213 state = useAsState (mkHsValueMap state_ty)
214 -- All but the last argument are inports
215 inports = map (useAsPort . mkHsValueMap)(init arg_tys)
216 hsargs = inports ++ [state]
217 hsres = case splitTupleType res_ty of
218 -- Result type must be a two tuple (state, ports)
219 Just [outstate_ty, outport_ty] -> if Type.coreEqType state_ty outstate_ty
221 Tuple [state, useAsPort (mkHsValueMap outport_ty)]
223 error $ "Input state type of function " ++ hsname ++ ": " ++ (showSDoc $ ppr state_ty) ++ " does not match output state type: " ++ (showSDoc $ ppr outstate_ty)
224 otherwise -> error $ "Return type of top-level function " ++ hsname ++ " must be a two-tuple containing a state and output ports."
228 -- Just use everything as a port
229 (map (useAsPort . mkHsValueMap) arg_tys, useAsPort $ mkHsValueMap res_ty)
231 -- | Adds signal names to the given FlatFunction
237 nameFlatFunction hsfunc fdata =
238 let func = flatFunc fdata in
240 -- Skip (builtin) functions without a FlatFunction
241 Nothing -> do return ()
242 -- Name the signals in all other functions
244 let s = flat_sigs flatfunc in
245 let s' = map nameSignal s in
246 let flatfunc' = flatfunc { flat_sigs = s' } in
247 setFlatFunc hsfunc flatfunc'
249 nameSignal :: (SignalId, SignalInfo) -> (SignalId, SignalInfo)
250 nameSignal (id, info) =
251 let hints = nameHints info in
252 let parts = ("sig" : hints) ++ [show id] in
253 let name = concat $ List.intersperse "_" parts in
254 (id, info {sigName = Just name})
256 -- | Splits a tuple type into a list of element types, or Nothing if the type
257 -- is not a tuple type.
259 Type -- ^ The type to split
260 -> Maybe [Type] -- ^ The tuples element types
263 case Type.splitTyConApp_maybe ty of
264 Just (tycon, args) -> if TyCon.isTupleTyCon tycon
271 -- | A consise representation of a (set of) ports on a builtin function
272 type PortMap = HsValueMap (String, AST.TypeMark)
273 -- | A consise representation of a builtin function
274 data BuiltIn = BuiltIn String [PortMap] PortMap
276 -- | Map a port specification of a builtin function to a VHDL Signal to put in
278 toVHDLSignalMap :: HsValueMap (String, AST.TypeMark) -> VHDLSignalMap
279 toVHDLSignalMap = fmap (\(name, ty) -> Just (VHDL.mkVHDLId name, ty))
281 -- | Translate a concise representation of a builtin function to something
282 -- that can be put into FuncMap directly.
283 addBuiltIn :: BuiltIn -> VHDLState ()
284 addBuiltIn (BuiltIn name args res) = do
286 setEntity hsfunc entity
288 hsfunc = HsFunction name (map useAsPort args) (useAsPort res)
289 entity = Entity (VHDL.mkVHDLId name) (map toVHDLSignalMap args) (toVHDLSignalMap res) Nothing
293 BuiltIn "hwxor" [(Single ("a", VHDL.bit_ty)), (Single ("b", VHDL.bit_ty))] (Single ("o", VHDL.bit_ty)),
294 BuiltIn "hwand" [(Single ("a", VHDL.bit_ty)), (Single ("b", VHDL.bit_ty))] (Single ("o", VHDL.bit_ty)),
295 BuiltIn "hwor" [(Single ("a", VHDL.bit_ty)), (Single ("b", VHDL.bit_ty))] (Single ("o", VHDL.bit_ty)),
296 BuiltIn "hwnot" [(Single ("a", VHDL.bit_ty))] (Single ("o", VHDL.bit_ty))
299 -- vim: set ts=8 sw=2 sts=2 expandtab: