--
module VHDL where
-import Flatten
+import Data.Traversable
+import qualified Maybe
+
import qualified Type
import qualified Name
import qualified TyCon
-import qualified Maybe
import Outputable ( showSDoc, ppr )
+
import qualified ForSyDe.Backend.VHDL.AST as AST
+import VHDLTypes
+import FlattenTypes
+import TranslatorTypes
+
+-- | Create an entity for a given function
+createEntity ::
+ HsFunction -- | The function signature
+ -> FuncData -- | The function data collected so far
+ -> FuncData -- | The modified function data
+
+createEntity hsfunc fdata =
+ let func = flatFunc fdata in
+ case func of
+ -- Skip (builtin) functions without a FlatFunction
+ Nothing -> fdata
+ -- Create an entity for all other functions
+ Just flatfunc ->
+
+ let
+ s = sigs flatfunc
+ a = args flatfunc
+ r = res flatfunc
+ args' = map (fmap (mkMap s)) a
+ res' = fmap (mkMap s) r
+ ent_decl' = createEntityAST hsfunc args' res'
+ entity' = Entity args' res' (Just ent_decl')
+ in
+ fdata { entity = Just entity' }
+ where
+ mkMap :: Eq id => [(id, SignalInfo)] -> id -> (AST.VHDLId, AST.TypeMark)
+ mkMap sigmap id =
+ (mkVHDLId nm, vhdl_ty ty)
+ where
+ info = Maybe.fromMaybe
+ (error $ "Signal not found in the name map? This should not happen!")
+ (lookup id sigmap)
+ nm = Maybe.fromMaybe
+ (error $ "Signal not named? This should not happen!")
+ (sigName info)
+ ty = sigTy info
+
+-- | Create the VHDL AST for an entity
+createEntityAST ::
+ HsFunction -- | The signature of the function we're working with
+ -> [VHDLSignalMap] -- | The entity's arguments
+ -> VHDLSignalMap -- | The entity's result
+ -> AST.EntityDec -- | The entity with the ent_decl filled in as well
+
+createEntityAST hsfunc args res =
+ AST.EntityDec vhdl_id ports
+ where
+ vhdl_id = mkEntityId hsfunc
+ ports = []
+
+-- | Generate a VHDL entity name for the given hsfunc
+mkEntityId hsfunc =
+ -- TODO: This doesn't work for functions with multiple signatures!
+ mkVHDLId $ hsFuncName hsfunc
+
+getLibraryUnits ::
+ (HsFunction, FuncData) -- | A function from the session
+ -> [AST.LibraryUnit] -- | The library units it generates
+
+getLibraryUnits (hsfunc, fdata) =
+ case entity fdata of
+ Nothing -> []
+ Just ent -> case ent_decl ent of
+ Nothing -> []
+ Just decl -> [AST.LUEntity decl]
+
-- | The VHDL Bit type
bit_ty :: AST.TypeMark
bit_ty = AST.unsafeVHDLBasicId "Bit"