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"
47 makeVHDL :: String -> String -> IO ()
48 makeVHDL filename name = do
50 core <- loadModule filename
52 vhdl <- moduleToVHDL core [name]
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
70 moduleToVHDL :: HscTypes.CoreModule -> [String] -> IO [AST.DesignFile]
71 moduleToVHDL core names = do
72 --liftIO $ putStr $ prettyShow (cm_binds core)
73 let binds = findBinds core names
74 --putStr $ prettyShow binds
75 -- Turn bind into VHDL
76 let (vhdl, sess) = State.runState (mkVHDL binds) (VHDLSession core 0 Map.empty)
77 mapM (putStr . render . ForSyDe.Backend.Ppr.ppr) vhdl
78 putStr $ "\n\nFinal session:\n" ++ prettyShow sess ++ "\n\n"
82 -- Turns the given bind into VHDL
84 -- Add the builtin functions
85 mapM addBuiltIn builtin_funcs
86 -- Create entities and architectures for them
87 mapM processBind binds
88 modFuncs nameFlatFunction
89 modFuncs VHDL.createEntity
90 modFuncs VHDL.createArchitecture
93 -- | Write the given design file to a file inside the given dir
94 -- The first library unit in the designfile must be an entity, whose name
95 -- will be used as a filename.
96 writeVHDL :: String -> AST.DesignFile -> IO ()
97 writeVHDL dir vhdl = do
98 let AST.DesignFile _ (u:us) = vhdl
99 let AST.LUEntity (AST.EntityDec id _) = u
100 let fname = dir ++ AST.fromVHDLId id ++ ".vhdl"
101 ForSyDe.Backend.VHDL.FileIO.writeDesignFile vhdl fname
103 -- | Loads the given file and turns it into a core module.
104 loadModule :: String -> IO HscTypes.CoreModule
105 loadModule filename =
106 defaultErrorHandler defaultDynFlags $ do
107 runGhc (Just libdir) $ do
108 dflags <- getSessionDynFlags
109 setSessionDynFlags dflags
110 --target <- guessTarget "adder.hs" Nothing
111 --liftIO (print (showSDoc (ppr (target))))
112 --liftIO $ printTarget target
113 --setTargets [target]
114 --load LoadAllTargets
115 --core <- GHC.compileToCoreSimplified "Adders.hs"
116 core <- GHC.compileToCoreSimplified filename
119 -- | Extracts the named binds from the given module.
120 findBinds :: HscTypes.CoreModule -> [String] -> [CoreBind]
121 findBinds core names = Maybe.mapMaybe (findBind (cm_binds core)) names
123 -- | Extract a named bind from the given list of binds
124 findBind :: [CoreBind] -> String -> Maybe CoreBind
125 findBind binds lookfor =
126 -- This ignores Recs and compares the name of the bind with lookfor,
127 -- disregarding any namespaces in OccName and extra attributes in Name and
129 find (\b -> case b of
131 NonRec var _ -> lookfor == (occNameString $ nameOccName $ getName var)
134 -- | Processes the given bind as a top level bind.
136 CoreBind -- The bind to process
139 processBind (Rec _) = error "Recursive binders not supported"
140 processBind bind@(NonRec var expr) = do
141 -- Create the function signature
142 let ty = CoreUtils.exprType expr
143 let hsfunc = mkHsFunction var ty
144 flattenBind hsfunc bind
146 -- | Flattens the given bind into the given signature and adds it to the
147 -- session. Then (recursively) finds any functions it uses and does the same
150 HsFunction -- The signature to flatten into
151 -> CoreBind -- The bind to flatten
154 flattenBind _ (Rec _) = error "Recursive binders not supported"
156 flattenBind hsfunc bind@(NonRec var expr) = do
157 -- Flatten the function
158 let flatfunc = flattenFunction hsfunc bind
160 setFlatFunc hsfunc flatfunc
161 let used_hsfuncs = Maybe.mapMaybe usedHsFunc (flat_defs flatfunc)
162 State.mapM resolvFunc used_hsfuncs
165 -- | Find the given function, flatten it and add it to the session. Then
166 -- (recursively) do the same for any functions used.
168 HsFunction -- | The function to look for
171 resolvFunc hsfunc = do
172 -- See if the function is already known
173 func <- getFunc hsfunc
175 -- Already known, do nothing
178 -- New function, resolve it
180 -- Get the current module
182 -- Find the named function
183 let bind = findBind (cm_binds core) name
185 Nothing -> error $ "Couldn't find function " ++ name ++ " in current module."
186 Just b -> flattenBind hsfunc b
188 name = hsFuncName hsfunc
190 -- | Translate a top level function declaration to a HsFunction. i.e., which
191 -- interface will be provided by this function. This function essentially
192 -- defines the "calling convention" for hardware models.
194 Var.Var -- ^ The function defined
195 -> Type -- ^ The function type (including arguments!)
196 -> HsFunction -- ^ The resulting HsFunction
199 HsFunction hsname hsargs hsres
201 hsname = getOccString f
202 (arg_tys, res_ty) = Type.splitFunTys ty
203 -- The last argument must be state
204 state_ty = last arg_tys
205 state = useAsState (mkHsValueMap state_ty)
206 -- All but the last argument are inports
207 inports = map (useAsPort . mkHsValueMap)(init arg_tys)
208 hsargs = inports ++ [state]
209 hsres = case splitTupleType res_ty of
210 -- Result type must be a two tuple (state, ports)
211 Just [outstate_ty, outport_ty] -> if Type.coreEqType state_ty outstate_ty
213 Tuple [state, useAsPort (mkHsValueMap outport_ty)]
215 error $ "Input state type of function " ++ hsname ++ ": " ++ (showSDoc $ ppr state_ty) ++ " does not match output state type: " ++ (showSDoc $ ppr outstate_ty)
216 otherwise -> error $ "Return type of top-level function " ++ hsname ++ " must be a two-tuple containing a state and output ports."
218 -- | Adds signal names to the given FlatFunction
224 nameFlatFunction hsfunc fdata =
225 let func = flatFunc fdata in
227 -- Skip (builtin) functions without a FlatFunction
228 Nothing -> do return ()
229 -- Name the signals in all other functions
231 let s = flat_sigs flatfunc in
232 let s' = map nameSignal s in
233 let flatfunc' = flatfunc { flat_sigs = s' } in
234 setFlatFunc hsfunc flatfunc'
236 nameSignal :: (SignalId, SignalInfo) -> (SignalId, SignalInfo)
237 nameSignal (id, info) =
238 let hints = nameHints info in
239 let parts = ("sig" : hints) ++ [show id] in
240 let name = concat $ List.intersperse "_" parts in
241 (id, info {sigName = Just name})
243 -- | Splits a tuple type into a list of element types, or Nothing if the type
244 -- is not a tuple type.
246 Type -- ^ The type to split
247 -> Maybe [Type] -- ^ The tuples element types
250 case Type.splitTyConApp_maybe ty of
251 Just (tycon, args) -> if TyCon.isTupleTyCon tycon
258 -- | A consise representation of a (set of) ports on a builtin function
259 type PortMap = HsValueMap (String, AST.TypeMark)
260 -- | A consise representation of a builtin function
261 data BuiltIn = BuiltIn String [PortMap] PortMap
263 -- | Map a port specification of a builtin function to a VHDL Signal to put in
265 toVHDLSignalMap :: HsValueMap (String, AST.TypeMark) -> VHDLSignalMap
266 toVHDLSignalMap = fmap (\(name, ty) -> Just (VHDL.mkVHDLId name, ty))
268 -- | Translate a concise representation of a builtin function to something
269 -- that can be put into FuncMap directly.
270 addBuiltIn :: BuiltIn -> VHDLState ()
271 addBuiltIn (BuiltIn name args res) = do
273 setEntity hsfunc entity
275 hsfunc = HsFunction name (map useAsPort args) (useAsPort res)
276 entity = Entity (VHDL.mkVHDLId name) (map toVHDLSignalMap args) (toVHDLSignalMap res) Nothing
280 BuiltIn "hwxor" [(Single ("a", VHDL.bit_ty)), (Single ("b", VHDL.bit_ty))] (Single ("o", VHDL.bit_ty)),
281 BuiltIn "hwand" [(Single ("a", VHDL.bit_ty)), (Single ("b", VHDL.bit_ty))] (Single ("o", VHDL.bit_ty)),
282 BuiltIn "hwor" [(Single ("a", VHDL.bit_ty)), (Single ("b", VHDL.bit_ty))] (Single ("o", VHDL.bit_ty)),
283 BuiltIn "hwnot" [(Single ("a", VHDL.bit_ty))] (Single ("o", VHDL.bit_ty))
286 -- vim: set ts=8 sw=2 sts=2 expandtab: