1 module Translator where
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 HscTypes ( cm_binds, cm_types )
17 import MonadUtils ( liftIO )
18 import Outputable ( showSDoc, ppr )
19 import GHC.Paths ( libdir )
20 import DynFlags ( defaultDynFlags )
23 import qualified Monad
25 -- The following modules come from the ForSyDe project. They are really
26 -- internal modules, so ForSyDe.cabal has to be modified prior to installing
27 -- ForSyDe to get access to these modules.
28 import qualified ForSyDe.Backend.VHDL.AST as AST
29 import qualified ForSyDe.Backend.VHDL.Ppr
30 import qualified ForSyDe.Backend.VHDL.FileIO
31 import qualified ForSyDe.Backend.Ppr
32 -- This is needed for rendering the pretty printed VHDL
33 import Text.PrettyPrint.HughesPJ (render)
35 import TranslatorTypes
42 defaultErrorHandler defaultDynFlags $ do
43 runGhc (Just libdir) $ do
44 dflags <- getSessionDynFlags
45 setSessionDynFlags dflags
46 --target <- guessTarget "adder.hs" Nothing
47 --liftIO (print (showSDoc (ppr (target))))
48 --liftIO $ printTarget target
51 --core <- GHC.compileToCoreSimplified "Adders.hs"
52 core <- GHC.compileToCoreSimplified "Adders.hs"
53 --liftIO $ printBinds (cm_binds core)
54 let binds = Maybe.mapMaybe (findBind (cm_binds core)) ["sfull_adder"]
55 liftIO $ putStr $ prettyShow binds
56 -- Turn bind into VHDL
57 let (vhdl, sess) = State.runState (mkVHDL binds) (VHDLSession core 0 Map.empty)
58 liftIO $ putStr $ render $ ForSyDe.Backend.Ppr.ppr vhdl
59 liftIO $ ForSyDe.Backend.VHDL.FileIO.writeDesignFile vhdl "../vhdl/vhdl/output.vhdl"
60 liftIO $ putStr $ "\n\nFinal session:\n" ++ prettyShow sess ++ "\n\n"
63 -- Turns the given bind into VHDL
65 -- Add the builtin functions
66 --mapM (uncurry addFunc) builtin_funcs
67 -- Create entities and architectures for them
68 mapM flattenBind binds
69 return $ AST.DesignFile
73 findBind :: [CoreBind] -> String -> Maybe CoreBind
74 findBind binds lookfor =
75 -- This ignores Recs and compares the name of the bind with lookfor,
76 -- disregarding any namespaces in OccName and extra attributes in Name and
80 NonRec var _ -> lookfor == (occNameString $ nameOccName $ getName var)
83 -- | Flattens the given bind and adds it to the session. Then (recursively)
84 -- finds any functions it uses and does the same with them.
86 CoreBind -- The binder to flatten
89 flattenBind (Rec _) = error "Recursive binders not supported"
91 flattenBind bind@(NonRec var expr) = do
92 -- Create the function signature
93 let ty = CoreUtils.exprType expr
94 let hsfunc = mkHsFunction var ty
95 --hwfunc <- mkHWFunction bind hsfunc
96 -- Add it to the session
97 --addFunc hsfunc hwfunc
98 let flatfunc = flattenFunction hsfunc bind
99 addFunc hsfunc flatfunc
100 let used_hsfuncs = map appFunc (apps flatfunc)
101 State.mapM resolvFunc used_hsfuncs
104 -- | Find the given function, flatten it and add it to the session. Then
105 -- (recursively) do the same for any functions used.
107 HsFunction -- | The function to look for
110 resolvFunc hsfunc = do
111 -- See if the function is already known
112 func <- getFunc hsfunc
114 -- Already known, do nothing
117 -- New function, resolve it
119 -- Get the current module
121 -- Find the named function
122 let bind = findBind (cm_binds core) name
124 Nothing -> error $ "Couldn't find function " ++ name ++ " in current module."
125 Just b -> flattenBind b
127 name = hsFuncName hsfunc
129 -- | Translate a top level function declaration to a HsFunction. i.e., which
130 -- interface will be provided by this function. This function essentially
131 -- defines the "calling convention" for hardware models.
133 Var.Var -- ^ The function defined
134 -> Type -- ^ The function type (including arguments!)
135 -> HsFunction -- ^ The resulting HsFunction
138 HsFunction hsname hsargs hsres
140 hsname = getOccString f
141 (arg_tys, res_ty) = Type.splitFunTys ty
142 -- The last argument must be state
143 state_ty = last arg_tys
144 state = useAsState (mkHsValueMap state_ty)
145 -- All but the last argument are inports
146 inports = map (useAsPort . mkHsValueMap)(init arg_tys)
147 hsargs = inports ++ [state]
148 hsres = case splitTupleType res_ty of
149 -- Result type must be a two tuple (state, ports)
150 Just [outstate_ty, outport_ty] -> if Type.coreEqType state_ty outstate_ty
152 Tuple [state, useAsPort (mkHsValueMap outport_ty)]
154 error $ "Input state type of function " ++ hsname ++ ": " ++ (showSDoc $ ppr state_ty) ++ " does not match output state type: " ++ (showSDoc $ ppr outstate_ty)
155 otherwise -> error $ "Return type of top-level function " ++ hsname ++ " must be a two-tuple containing a state and output ports."
157 -- | Splits a tuple type into a list of element types, or Nothing if the type
158 -- is not a tuple type.
160 Type -- ^ The type to split
161 -> Maybe [Type] -- ^ The tuples element types
164 case Type.splitTyConApp_maybe ty of
165 Just (tycon, args) -> if TyCon.isTupleTyCon tycon
172 -- | A consise representation of a (set of) ports on a builtin function
173 type PortMap = HsValueMap (String, AST.TypeMark)
175 -- | Translate a concise representation of a builtin function to something
176 -- that can be put into FuncMap directly.
177 make_builtin :: String -> [PortMap] -> PortMap -> (HsFunction, FuncData)
178 make_builtin name args res =
181 hsfunc = HsFunction name (map useAsPort args) (useAsPort res)
185 make_builtin "hwxor" [(Single ("a", VHDL.bit_ty)), (Single ("b", VHDL.bit_ty))] (Single ("o", VHDL.bit_ty))
188 -- vim: set ts=8 sw=2 sts=2 expandtab: