module FlattenTypes where
import Data.Traversable
+import qualified Data.Foldable as Foldable
import qualified Control.Monad.State as State
import CoreSyn
+import qualified Type
import HsValueMap
}
deriving (Show, Eq, Ord)
+-- | Is this HsValueUse a state use?
+isStateUse :: HsValueUse -> Bool
+isStateUse (State _) = True
+isStateUse _ = False
+
-- | A map from a Haskell value to the use of each single value
type HsUseMap = HsValueMap HsValueUse
hsFuncRes :: HsUseMap
} deriving (Show, Eq, Ord)
+hasState :: HsFunction -> Bool
+hasState hsfunc =
+ any (Foldable.any isStateUse) (hsFuncArgs hsfunc)
+ || Foldable.any isStateUse (hsFuncRes hsfunc)
+
-- | A flattened function application
data FApp sigid = FApp {
appFunc :: HsFunction,
condRes :: sigid
} deriving (Show, Eq)
+-- | How is a given signal used in the resulting VHDL?
+data SigUse =
+ SigPort -- | Use as a port
+ | SigInternal -- | Use as an internal signal
+ | SigState -- | Use as an internal state
+ | SigSubState -- | Do not use, state variable is used in a subcircuit
+
-- | Information on a signal definition
-data Signal sigid = Signal {
- id :: sigid
-} deriving (Eq, Show)
+data SignalInfo = SignalInfo {
+ sigName :: Maybe String,
+ sigUse :: SigUse,
+ sigTy :: Type.Type
+}
-- | A flattened function
data FlatFunction' sigid = FlatFunction {
- args :: [SignalMap sigid],
- res :: SignalMap sigid,
- apps :: [FApp sigid],
- conds :: [CondDef sigid],
- sigs :: [Signal sigid]
-} deriving (Show, Eq)
+ flat_args :: [SignalMap sigid],
+ flat_res :: SignalMap sigid,
+ flat_apps :: [FApp sigid],
+ flat_conds :: [CondDef sigid],
+ flat_sigs :: [(sigid, SignalInfo)]
+}
-- | A flat function that does not have its signals named
type FlatFunction = FlatFunction' UnnamedSignal
)]
-- | The state during the flattening of a single function
-type FlattenState = State.State ([FApp UnnamedSignal], [CondDef UnnamedSignal], [Signal UnnamedSignal], UnnamedSignal)
+type FlattenState = State.State ([FApp UnnamedSignal], [CondDef UnnamedSignal], [(UnnamedSignal, SignalInfo)], UnnamedSignal)
-- | Add an application to the current FlattenState
addApp :: (FApp UnnamedSignal) -> FlattenState ()
State.put (apps, c:conds, sigs, n)
-- | Generates a new signal id, which is unique within the current flattening.
-genSignalId :: FlattenState UnnamedSignal
-genSignalId = do
+genSignalId :: SigUse -> Type.Type -> FlattenState UnnamedSignal
+genSignalId use ty = do
(apps, conds, sigs, n) <- State.get
- let s = Signal n
+ -- Generate a new numbered but unnamed signal
+ let s = (n, SignalInfo Nothing use ty)
State.put (apps, conds, s:sigs, n+1)
return n