- [(SignalId, SignalInfo)] -- | The signals in the current architecture
- -> SigDef -- | The signal definition
- -> VHDLState AST.ConcSm -- | The corresponding VHDL component instantiation.
-
-mkConcSm sigs (FApp hsfunc args res) = do
- fdata_maybe <- getFunc hsfunc
- let fdata = Maybe.fromMaybe
- (error $ "Using function '" ++ (prettyShow hsfunc) ++ "' that is not in the session? This should not happen!")
- fdata_maybe
- let entity = Maybe.fromMaybe
- (error $ "Using function '" ++ (prettyShow hsfunc) ++ "' without entity declaration? This should not happen!")
- (funcEntity fdata)
- let entity_id = ent_id entity
- label <- uniqueName (AST.fromVHDLId entity_id)
- let portmaps = mkAssocElems sigs args res entity
- return $ AST.CSISm $ AST.CompInsSm (mkVHDLId label) (AST.IUEntity (AST.NSimple entity_id)) (AST.PMapAspect portmaps)
-
-mkAssocElems ::
- [(SignalId, SignalInfo)] -- | The signals in the current architecture
- -> [SignalMap] -- | The signals that are applied to function
- -> SignalMap -- | the signals in which to store the function result
- -> Entity -- | The entity to map against.
- -> [AST.AssocElem] -- | The resulting port maps
-
-mkAssocElems sigmap args res entity =
- -- Create the actual AssocElems
- Maybe.catMaybes $ zipWith mkAssocElem ports sigs
+ (CoreSyn.CoreBndr, CoreSyn.CoreExpr) -- ^ The binding to process
+ -> VHDLState [AST.ConcSm] -- ^ The corresponding VHDL component instantiations.
+
+
+-- Ignore Cast expressions, they should not longer have any meaning as long as
+-- the type works out.
+mkConcSm (bndr, Cast expr ty) = mkConcSm (bndr, expr)
+
+-- For simple a = b assignments, just generate an unconditional signal
+-- assignment. This should only happen for dataconstructors without arguments.
+-- TODO: Integrate this with the below code for application (essentially this
+-- is an application without arguments)
+mkConcSm (bndr, Var v) = return $ [mkUncondAssign (Left bndr) (varToVHDLExpr v)]
+
+mkConcSm (bndr, app@(CoreSyn.App _ _))= do
+ let (CoreSyn.Var f, args) = CoreSyn.collectArgs app
+ let valargs' = filter isValArg args
+ let valargs = filter (\(CoreSyn.Var bndr) -> not (Id.isDictId bndr)) valargs'
+ case Var.globalIdVarDetails f of
+ IdInfo.DataConWorkId dc ->
+ -- It's a datacon. Create a record from its arguments.
+ -- First, filter out type args. TODO: Is this the best way to do this?
+ -- The types should already have been taken into acocunt when creating
+ -- the signal, so this should probably work...
+ --let valargs = filter isValArg args in
+ if all is_var valargs then do
+ labels <- getFieldLabels (CoreUtils.exprType app)
+ return $ zipWith mkassign labels valargs
+ else
+ error $ "VHDL.mkConcSm Not in normal form: One ore more complex arguments: " ++ pprString args
+ where
+ mkassign :: AST.VHDLId -> CoreExpr -> AST.ConcSm
+ mkassign label (Var arg) =
+ let sel_name = mkSelectedName bndr label in
+ mkUncondAssign (Right sel_name) (varToVHDLExpr arg)
+ IdInfo.VanillaGlobal -> do
+ -- It's a global value imported from elsewhere. These can be builtin
+ -- functions.
+ funSignatures <- getA vsNameTable
+ signatures <- getA vsSignatures
+ case (Map.lookup (bndrToString f) funSignatures) of
+ Just (arg_count, builder) ->
+ if length valargs == arg_count then
+ case builder of
+ Left funBuilder ->
+ let
+ sigs = map (varToVHDLExpr.varBndr) valargs
+ func = funBuilder sigs
+ src_wform = AST.Wform [AST.WformElem func Nothing]
+ dst_name = AST.NSimple (mkVHDLExtId (bndrToString bndr))
+ assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
+ in
+ return [AST.CSSASm assign]
+ Right genBuilder ->
+ let
+ sigs = map varBndr valargs
+ signature = Maybe.fromMaybe
+ (error $ "Using function '" ++ (bndrToString (head sigs)) ++ "' without signature? This should not happen!")
+ (Map.lookup (head sigs) signatures)
+ arg = tail sigs
+ genSm = genBuilder signature (arg ++ [bndr])
+ in return [AST.CSGSm genSm]
+ else
+ error $ "VHDL.mkConcSm Incorrect number of arguments to builtin function: " ++ pprString f ++ " Args: " ++ pprString valargs
+ Nothing -> error $ "Using function from another module that is not a known builtin: " ++ pprString f
+ IdInfo.NotGlobalId -> do
+ signatures <- getA vsSignatures
+ -- This is a local id, so it should be a function whose definition we
+ -- have and which can be turned into a component instantiation.
+ let
+ signature = Maybe.fromMaybe
+ (error $ "Using function '" ++ (bndrToString f) ++ "' without signature? This should not happen!")
+ (Map.lookup f signatures)
+ entity_id = ent_id signature
+ label = "comp_ins_" ++ bndrToString bndr
+ -- Add a clk port if we have state
+ --clk_port = Maybe.fromJust $ mkAssocElem (Just $ mkVHDLExtId "clk") "clk"
+ clk_port = Maybe.fromJust $ mkAssocElem (Just $ mkVHDLExtId "clk") "clk"
+ --portmaps = mkAssocElems sigs args res signature ++ (if hasState hsfunc then [clk_port] else [])
+ portmaps = clk_port : mkAssocElems args bndr signature
+ in
+ return [genComponentInst label entity_id portmaps]
+ details -> error $ "Calling unsupported function " ++ pprString f ++ " with GlobalIdDetails " ++ pprString details
+
+-- A single alt case must be a selector. This means thee scrutinee is a simple
+-- variable, the alternative is a dataalt with a single non-wild binder that
+-- is also returned.
+mkConcSm (bndr, expr@(Case (Var scrut) b ty [alt])) =
+ case alt of
+ (DataAlt dc, bndrs, (Var sel_bndr)) -> do
+ case List.elemIndex sel_bndr bndrs of
+ Just i -> do
+ labels <- getFieldLabels (Id.idType scrut)
+ let label = labels!!i
+ let sel_name = mkSelectedName scrut label
+ let sel_expr = AST.PrimName sel_name
+ return [mkUncondAssign (Left bndr) sel_expr]
+ Nothing -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
+
+ _ -> error $ "VHDL.mkConcSM Not in normal form: Not a selector case:\n" ++ (pprString expr)
+
+-- Multiple case alt are be conditional assignments and have only wild
+-- binders in the alts and only variables in the case values and a variable
+-- for a scrutinee. We check the constructor of the second alt, since the
+-- first is the default case, if there is any.
+mkConcSm (bndr, (Case (Var scrut) b ty [(_, _, Var false), (con, _, Var true)])) =
+ let
+ cond_expr = (varToVHDLExpr scrut) AST.:=: (altconToVHDLExpr con)
+ true_expr = (varToVHDLExpr true)
+ false_expr = (varToVHDLExpr false)
+ in
+ return [mkCondAssign (Left bndr) cond_expr true_expr false_expr]
+mkConcSm (_, (Case (Var _) _ _ alts)) = error "VHDL.mkConcSm Not in normal form: Case statement with more than two alternatives"
+mkConcSm (_, Case _ _ _ _) = error "VHDL.mkConcSm Not in normal form: Case statement has does not have a simple variable as scrutinee"
+mkConcSm (bndr, expr) = error $ "VHDL.mkConcSM Unsupported binding in let expression: " ++ pprString bndr ++ " = " ++ pprString expr
+
+-- Finds the field labels for VHDL type generated for the given Core type,
+-- which must result in a record type.
+getFieldLabels :: Type.Type -> VHDLState [AST.VHDLId]
+getFieldLabels ty = do
+ -- Ensure that the type is generated (but throw away it's VHDLId)
+ vhdl_ty ty
+ -- Get the types map, lookup and unpack the VHDL TypeDef
+ types <- getA vsTypes
+ case Map.lookup (OrdType ty) types of
+ Just (_, Left (AST.TDR (AST.RecordTypeDef elems))) -> return $ map (\(AST.ElementDec id _) -> id) elems
+ _ -> error $ "VHDL.getFieldLabels Type not found or not a record type? This should not happen! Type: " ++ (show ty)
+
+{-
+mkConcSm sigs (UncondDef src dst) _ = do
+ src_expr <- vhdl_expr src
+ let src_wform = AST.Wform [AST.WformElem src_expr Nothing]
+ let dst_name = AST.NSimple (getSignalId $ signalInfo sigs dst)
+ let assign = dst_name AST.:<==: (AST.ConWforms [] src_wform Nothing)
+ return $ AST.CSSASm assign