import qualified Name
import qualified OccName
import qualified Var
+import qualified Id
+import qualified IdInfo
import qualified TyCon
import qualified DataCon
+import qualified CoreSubst
+import qualified CoreUtils
import Outputable ( showSDoc, ppr )
-- Local imports
map (Arrow.second $ AST.DesignFile full_context) units
where
- init_session = VHDLSession Map.empty Map.empty Map.empty builtin_funcs globalNameTable
+ init_session = VHDLSession Map.empty Map.empty builtin_funcs globalNameTable
(units, final_session) =
State.runState (createLibraryUnits binds) init_session
- ty_decls = Map.elems (final_session ^. vsTypes)
- subty_decls = Map.elems (final_session ^. vsSubTypes)
tyfun_decls = Map.elems (final_session ^.vsTypeFuns)
+ ty_decls = map mktydecl $ Map.elems (final_session ^. vsTypes)
ieee_context = [
AST.Library $ mkVHDLBasicId "IEEE",
mkUseAll ["IEEE", "std_logic_1164"],
full_context =
mkUseAll ["work", "types"]
: ieee_context
- type_package_dec = AST.LUPackageDec $ AST.PackageDec (mkVHDLBasicId "types") (packageTypeDecs ++ packageSubtypeDecs ++ subProgSpecs)
+ type_package_dec = AST.LUPackageDec $ AST.PackageDec (mkVHDLBasicId "types") (ty_decls ++ subProgSpecs)
type_package_body = AST.LUPackageBody $ AST.PackageBody typesId (concat tyfun_decls)
- packageTypeDecs = map (AST.PDITD . snd) ty_decls
- packageSubtypeDecs = map (AST.PDISD . snd) subty_decls
subProgSpecs = concat (map subProgSpec tyfun_decls)
subProgSpec = map (\(AST.SubProgBody spec _ _) -> AST.PDISS spec)
+ mktydecl :: (AST.VHDLId, Either AST.TypeDef AST.SubtypeIn) -> AST.PackageDecItem
+ mktydecl (ty_id, Left ty_def) = AST.PDITD $ AST.TypeDec ty_id ty_def
+ mktydecl (ty_id, Right ty_def) = AST.PDISD $ AST.SubtypeDec ty_id ty_def
-- Create a use foo.bar.all statement. Takes a list of components in the used
-- name. Must contain at least two components
-> VHDLState AST.ConcSm -- ^ The corresponding VHDL component instantiation.
mkConcSm (bndr, app@(CoreSyn.App _ _))= do
- signatures <- getA vsSignatures
- funSignatures <- getA vsNameTable
let (CoreSyn.Var f, args) = CoreSyn.collectArgs app
- 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 ->
+ 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 [])
+ -- 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)
+ 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
-mkConcSm (bndr, (Case (Var scrut) b ty [alt])) = error "Single case alt not supported yet"
+-- 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
cond_expr = (varToVHDLExpr scrut) AST.:=: (conToVHDLExpr con)
true_expr = (varToVHDLExpr true)
false_expr = (varToVHDLExpr false)
- false_wform = AST.Wform [AST.WformElem false_expr Nothing]
- true_wform = AST.Wform [AST.WformElem true_expr Nothing]
- whenelse = AST.WhenElse true_wform cond_expr
- dst_name = AST.NSimple (bndrToVHDLId bndr)
- assign = dst_name AST.:<==: (AST.ConWforms [whenelse] false_wform Nothing)
in
- return $ AST.CSSASm assign
+ 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 =
+ let
+ sel_prefix = AST.NSimple $ bndrToVHDLId bndr
+ sel_suffix = AST.SSimple $ label
+ in
+ AST.NSelected $ sel_prefix AST.:.: sel_suffix
+
+-- 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)
+
-- Turn a variable reference into a AST expression
varToVHDLExpr :: Var.Var -> AST.Expr
varToVHDLExpr var = AST.PrimName $ AST.NSimple $ bndrToVHDLId var
Just t -> return t
-- No type yet, try to construct it
Nothing -> do
- let new_ty = do
- -- Use the Maybe Monad for failing when one of these fails
- (tycon, args) <- Type.splitTyConApp_maybe ty
- let name = Name.getOccString (TyCon.tyConName tycon)
- case name of
- "TFVec" -> Just $ mk_vector_ty (tfvec_len ty) ty
- "SizedWord" -> Just $ mk_vector_ty (sized_word_len ty) ty
- "RangedWord" -> Just $ mk_natural_ty 0 (ranged_word_bound ty) ty
- otherwise -> Nothing
- -- Return new_ty when a new type was successfully created
- Maybe.fromMaybe
- (error $ "Unsupported Haskell type: " ++ (showSDoc $ ppr ty))
- new_ty
+ newty_maybe <- (construct_vhdl_ty ty)
+ case newty_maybe of
+ Just (ty_id, ty_def) -> do
+ -- TODO: Check name uniqueness
+ modA vsTypes (Map.insert (OrdType ty) (ty_id, ty_def))
+ return ty_id
+ Nothing -> error $ "Unsupported Haskell type: " ++ (showSDoc $ ppr ty)
+
+-- Construct a new VHDL type for the given Haskell type.
+construct_vhdl_ty :: Type.Type -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+construct_vhdl_ty ty = do
+ case Type.splitTyConApp_maybe ty of
+ Just (tycon, args) -> do
+ let name = Name.getOccString (TyCon.tyConName tycon)
+ case name of
+ "TFVec" -> do
+ res <- mk_vector_ty (tfvec_len ty) ty
+ return $ Just $ (Arrow.second Left) res
+ "SizedWord" -> do
+ res <- mk_vector_ty (sized_word_len ty) ty
+ return $ Just $ (Arrow.second Left) res
+ "RangedWord" -> do
+ res <- mk_natural_ty 0 (ranged_word_bound ty) ty
+ return $ Just $ (Arrow.second Right) res
+ -- Create a custom type from this tycon
+ otherwise -> mk_tycon_ty tycon args
+ Nothing -> return $ Nothing
+
+-- | Create VHDL type for a custom tycon
+mk_tycon_ty :: TyCon.TyCon -> [Type.Type] -> VHDLState (Maybe (AST.TypeMark, Either AST.TypeDef AST.SubtypeIn))
+mk_tycon_ty tycon args =
+ case TyCon.tyConDataCons tycon of
+ -- Not an algebraic type
+ [] -> error $ "Only custom algebraic types are supported: " ++ (showSDoc $ ppr tycon)
+ [dc] -> do
+ let arg_tys = DataCon.dataConRepArgTys dc
+ -- TODO: CoreSubst docs say each Subs can be applied only once. Is this a
+ -- violation? Or does it only mean not to apply it again to the same
+ -- subject?
+ let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
+ elem_tys <- mapM vhdl_ty real_arg_tys
+ let elems = zipWith AST.ElementDec recordlabels elem_tys
+ -- For a single construct datatype, build a record with one field for
+ -- each argument.
+ -- TODO: Add argument type ids to this, to ensure uniqueness
+ -- TODO: Special handling for tuples?
+ let ty_id = mkVHDLExtId $ nameToString (TyCon.tyConName tycon)
+ let ty_def = AST.TDR $ AST.RecordTypeDef elems
+ return $ Just (ty_id, Left ty_def)
+ dcs -> error $ "Only single constructor datatypes supported: " ++ (showSDoc $ ppr tycon)
+ where
+ -- Create a subst that instantiates all types passed to the tycon
+ -- TODO: I'm not 100% sure that this is the right way to do this. It seems
+ -- to work so far, though..
+ tyvars = TyCon.tyConTyVars tycon
+ subst = CoreSubst.extendTvSubstList CoreSubst.emptySubst (zip tyvars args)
-- | Create a VHDL vector type
mk_vector_ty ::
Int -- ^ The length of the vector
-> Type.Type -- ^ The Haskell type to create a VHDL type for
- -> VHDLState AST.TypeMark -- The typemark created.
+ -> VHDLState (AST.TypeMark, AST.TypeDef) -- The typemark created.
mk_vector_ty len ty = do
-- Assume there is a single type argument
-- TODO: Use el_ty
let range = AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len - 1))]
let ty_def = AST.TDA $ AST.ConsArrayDef range std_logic_ty
- let ty_dec = AST.TypeDec ty_id ty_def
- -- TODO: Check name uniqueness
- --State.modify (Map.insert (OrdType ty) (ty_id, ty_dec))
- modA vsTypes (Map.insert (OrdType ty) (ty_id, ty_dec))
modA vsTypeFuns (Map.insert (OrdType ty) (genUnconsVectorFuns std_logic_ty ty_id))
- return ty_id
+ return (ty_id, ty_def)
mk_natural_ty ::
Int -- ^ The minimum bound (> 0)
-> Int -- ^ The maximum bound (> minimum bound)
-> Type.Type -- ^ The Haskell type to create a VHDL type for
- -> VHDLState AST.TypeMark -- The typemark created.
+ -> VHDLState (AST.TypeMark, AST.SubtypeIn) -- The typemark created.
mk_natural_ty min_bound max_bound ty = do
let ty_id = mkVHDLExtId $ "nat_" ++ (show min_bound) ++ "_to_" ++ (show max_bound)
let ty_def = AST.SubtypeIn naturalTM (Nothing)
- let ty_dec = AST.SubtypeDec ty_id ty_def
- modA vsSubTypes (Map.insert (OrdType ty) (ty_id, ty_dec))
- return ty_id
+ return (ty_id, ty_def)
builtin_types =
bndrToString = OccName.occNameString . Name.nameOccName . Var.varName
+-- Extracts the string version of the name
+nameToString :: Name.Name -> String
+nameToString = OccName.occNameString . Name.nameOccName
+
-- | A consise representation of a (set of) ports on a builtin function
--type PortMap = HsValueMap (String, AST.TypeMark)
-- | A consise representation of a builtin function
BuiltIn "hwnot" [("a", VHDL.bit_ty)] ("o", VHDL.bit_ty)
]
+recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
+
-- | Map a port specification of a builtin function to a VHDL Signal to put in
-- a VHDLSignalMap
toVHDLSignalMapElement :: (String, AST.TypeMark) -> VHDLSignalMapElement
projects / matthijs / master-project / cλash.git / blobdiff