+mkConcSm (bndr, app@(CoreSyn.App _ _))= do
+ let (CoreSyn.Var f, args) = CoreSyn.collectArgs app
+ 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)
+ let assigns = zipWith mkassign labels valargs
+ let block_id = bndrToVHDLId bndr
+ let block = AST.BlockSm block_id [] (AST.PMapAspect []) [] assigns
+ return $ AST.CSBSm block
+ 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 builting
+ -- functions.
+ funSignatures <- getA vsNameTable
+ case (Map.lookup (bndrToString f) funSignatures) of
+ Just funSignature ->
+ let
+ sigs = map (bndrToString.varBndr) args
+ sigsNames = map (\signal -> (AST.PrimName (AST.NSimple (mkVHDLExtId signal)))) sigs
+ func = (snd funSignature) sigsNames
+ 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
+ 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 (bndrToString f) signatures)
+ entity_id = ent_id signature
+ label = bndrToString bndr
+ -- Add a clk port if we have state
+ --clk_port = Maybe.fromJust $ mkAssocElem (Just $ mkVHDLExtId "clk") "clk"
+ --portmaps = mkAssocElems sigs args res signature ++ (if hasState hsfunc then [clk_port] else [])
+ portmaps = mkAssocElems args bndr signature
+ in
+ return $ AST.CSISm $ AST.CompInsSm (mkVHDLExtId label) (AST.IUEntity (AST.NSimple entity_id)) (AST.PMapAspect portmaps)
+ details -> error $ "Calling unsupported function " ++ pprString f ++ " with GlobalIdDetails " ++ pprString details
+
+-- GHC generates some funny "r = r" bindings in let statements before
+-- simplification. This outputs some dummy ConcSM for these, so things will at
+-- least compile for now.
+mkConcSm (bndr, CoreSyn.Var _) = return $ AST.CSPSm $ AST.ProcSm (mkVHDLBasicId "unused") [] []
+
+-- 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.:=: (conToVHDLExpr 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"
+
+-- Create an unconditional assignment statement
+mkUncondAssign ::
+ Either CoreBndr AST.VHDLName -- ^ The signal to assign to
+ -> AST.Expr -- ^ The expression to assign
+ -> AST.ConcSm -- ^ The resulting concurrent statement
+mkUncondAssign dst expr = mkAssign dst Nothing expr
+
+-- Create a conditional assignment statement
+mkCondAssign ::
+ Either CoreBndr AST.VHDLName -- ^ The signal to assign to
+ -> AST.Expr -- ^ The condition
+ -> AST.Expr -- ^ The value when true
+ -> AST.Expr -- ^ The value when false
+ -> AST.ConcSm -- ^ The resulting concurrent statement
+mkCondAssign dst cond true false = mkAssign dst (Just (cond, true)) false
+
+-- Create a conditional or unconditional assignment statement
+mkAssign ::
+ Either CoreBndr AST.VHDLName -> -- ^ The signal to assign to
+ Maybe (AST.Expr , AST.Expr) -> -- ^ Optionally, the condition to test for
+ -- and the value to assign when true.
+ AST.Expr -> -- ^ The value to assign when false or no condition
+ AST.ConcSm -- ^ The resulting concurrent statement
+
+mkAssign dst cond false_expr =
+ let
+ -- I'm not 100% how this assignment AST works, but this gets us what we
+ -- want...
+ whenelse = case cond of
+ Just (cond_expr, true_expr) ->
+ let
+ true_wform = AST.Wform [AST.WformElem true_expr Nothing]
+ in
+ [AST.WhenElse true_wform cond_expr]
+ Nothing -> []
+ false_wform = AST.Wform [AST.WformElem false_expr Nothing]
+ dst_name = case dst of
+ Left bndr -> AST.NSimple (bndrToVHDLId bndr)
+ Right name -> name
+ assign = dst_name AST.:<==: (AST.ConWforms whenelse false_wform Nothing)
+ in
+ AST.CSSASm assign
+
+-- Create a record field selector that selects the given label from the record
+-- stored in the given binder.
+mkSelectedName :: CoreBndr -> AST.VHDLId -> AST.VHDLName
+mkSelectedName bndr label =