X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=Translator.hs;h=53e626903b26c68fb3dfdd91e75382a281590917;hb=b355ab9f758667b108c017b11d9e64188b257f3e;hp=dea1fd7dfdf8730698316dac554f11c38b34a437;hpb=3296335286c7985374420af278b006856e250ce0;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

diff --git a/Translator.hs b/Translator.hs
index dea1fd7..53e6269 100644
--- a/Translator.hs
+++ b/Translator.hs
@@ -8,6 +8,7 @@ import qualified TyCon
 import qualified DataCon
 import qualified Maybe
 import qualified Module
+import qualified Control.Monad.State as State
 import Name
 import Data.Generics
 import NameEnv ( lookupNameEnv )
@@ -42,13 +43,21 @@ main =
 					liftIO $ printBinds (cm_binds core)
 					let bind = findBind "half_adder" (cm_binds core)
 					let NonRec var expr = bind
-					let sess = VHDLSession 0 builtin_funcs
-					let (sess', name, f) = mkHWFunction sess bind
-					let sess = addFunc sess' name f
+					-- Turn bind into VHDL
+					let vhdl = State.evalState (mkVHDL bind) (VHDLSession 0 builtin_funcs)
 					liftIO $ putStr $ showSDoc $ ppr expr
 					liftIO $ putStr "\n\n"
-					liftIO $ putStr $ render $ ForSyDe.Backend.Ppr.ppr $ getArchitecture sess bind
+					liftIO $ putStr $ render $ ForSyDe.Backend.Ppr.ppr $ vhdl
 					return expr
+	where
+		-- Turns the given bind into VHDL
+		mkVHDL bind = do
+			-- Get the function signature
+			(name, f) <- mkHWFunction bind
+			-- Add it to the session
+			addFunc name f
+			arch <- getArchitecture bind
+			return arch
 
 printTarget (Target (TargetFile file (Just x)) obj Nothing) =
 	print $ show file
@@ -192,14 +201,15 @@ mapOutputPorts (Tuple ports) (Tuple signals) =
 	concat (zipWith mapOutputPorts ports signals)
 
 getArchitecture ::
-	VHDLSession
-	-> CoreBind               -- The binder to expand into an architecture
-	-> AST.ArchBody           -- The resulting architecture
+	CoreBind                  -- The binder to expand into an architecture
+	-> VHDLState AST.ArchBody -- The resulting architecture
 	 
-getArchitecture sess (Rec _) = error "Recursive binders not supported"
+getArchitecture (Rec _) = error "Recursive binders not supported"
 
-getArchitecture sess (NonRec var expr) =
-	AST.ArchBody
+getArchitecture (NonRec var expr) = do
+	HWFunction inports outport <- getHWFunc name
+	sess <- State.get
+	return $ AST.ArchBody
 		(AST.unsafeVHDLBasicId "structural")
 		-- Use unsafe for now, to prevent pulling in ForSyDe error handling
 		(AST.NSimple (AST.unsafeVHDLBasicId name))
@@ -207,14 +217,11 @@ getArchitecture sess (NonRec var expr) =
 		(getInstantiations sess inports outport [] expr)
 	where
 		name = (getOccString var)
-		hwfunc = Maybe.fromMaybe
-			(error $ "Function " ++ name ++ "is unknown? This should not happen!")
-			(lookup name (funcs sess))
-		HWFunction inports outport = hwfunc
 
 data PortNameMap =
 	Tuple [PortNameMap]
 	| Port  String
+  deriving (Show)
 
 -- Generate a port name map (or multiple for tuple types) in the given direction for
 -- each type given.
@@ -238,17 +245,16 @@ data HWFunction = HWFunction { -- A function that is available in hardware
 	inPorts   :: [PortNameMap],
 	outPort   :: PortNameMap
 	--entity    :: AST.EntityDec
-}
+} deriving (Show)
 
 -- Turns a CoreExpr describing a function into a description of its input and
 -- output ports.
 mkHWFunction ::
-	VHDLSession
-	-> CoreBind                                -- The core binder to generate the interface for
-	-> (VHDLSession, String, HWFunction)       -- The name of the function and its interface
+	CoreBind                                   -- The core binder to generate the interface for
+	-> VHDLState (String, HWFunction)          -- The name of the function and its interface
 
-mkHWFunction sess (NonRec var expr) =
-	(sess, name, HWFunction inports outport)
+mkHWFunction (NonRec var expr) =
+		return (name, HWFunction inports outport)
 	where
 		name = (getOccString var)
 		ty = CoreUtils.exprType expr
@@ -261,18 +267,30 @@ mkHWFunction sess (NonRec var expr) =
 			ps     -> getPortNameMapForTys "portin" 0 ps
 		outport = getPortNameMapForTy "portout" res
 
-mkHWFunction sess (Rec _) =
+mkHWFunction (Rec _) =
 	error "Recursive binders not supported"
 
 data VHDLSession = VHDLSession {
 	nameCount :: Int,                      -- A counter that can be used to generate unique names
 	funcs     :: [(String, HWFunction)]    -- All functions available, indexed by name
-}
+} deriving (Show)
+
+type VHDLState = State.State VHDLSession
 
 -- Add the function to the session
-addFunc :: VHDLSession -> String -> HWFunction -> VHDLSession
-addFunc sess name f =
-	sess {funcs = (name, f) : (funcs sess) }
+addFunc :: String -> HWFunction -> VHDLState ()
+addFunc name f = do
+	fs <- State.gets funcs -- Get the funcs element from the session
+	State.modify (\x -> x {funcs = (name, f) : fs }) -- Prepend name and f
+
+-- Lookup the function with the given name in the current session. Errors if
+-- it was not found.
+getHWFunc :: String -> VHDLState HWFunction
+getHWFunc name = do
+	fs <- State.gets funcs -- Get the funcs element from the session
+	return $ Maybe.fromMaybe
+		(error $ "Function " ++ name ++ "is unknown? This should not happen!")
+		(lookup name fs)
 
 builtin_funcs = 
 	[