import qualified Control.Monad.State as State
import CoreSyn
+import qualified Type
import HsValueMap
-- | A signal identifier
type UnnamedSignal = Int
--- | A use of a signal
-data SignalUse sigid = SignalUse {
- sigUseId :: sigid
-} deriving (Show, Eq)
-
--- | A def of a signal
-data SignalDef sigid = SignalDef {
- sigDefId :: sigid
-} deriving (Show, Eq)
-
--- | A map of a Haskell value to signal uses
-type SignalUseMap sigid = HsValueMap (SignalUse sigid)
--- | A map of a Haskell value to signal defs
-type SignalDefMap sigid = HsValueMap (SignalDef sigid)
-
--- | Translate a SignalUseMap to an equivalent SignalDefMap
-useMapToDefMap :: SignalUseMap sigid -> SignalDefMap sigid
-useMapToDefMap = fmap (\(SignalUse u) -> SignalDef u)
-
--- | Translate a SignalDefMap to an equivalent SignalUseMap
-defMapToUseMap :: SignalDefMap sigid -> SignalUseMap sigid
-defMapToUseMap = fmap (\(SignalDef u) -> SignalUse u)
+-- | A map of a Haskell value to signal ids
+type SignalMap sigid = HsValueMap sigid
-- | How is a given (single) value in a function's type (ie, argument or
-- return value) used?
-- | A flattened function application
data FApp sigid = FApp {
appFunc :: HsFunction,
- appArgs :: [SignalUseMap sigid],
- appRes :: SignalDefMap sigid
+ appArgs :: [SignalMap sigid],
+ appRes :: SignalMap sigid
} deriving (Show, Eq)
-- | A conditional signal definition
data CondDef sigid = CondDef {
- cond :: SignalUse sigid,
- high :: SignalUse sigid,
- low :: SignalUse sigid,
- condRes :: SignalDef sigid
+ cond :: sigid,
+ high :: sigid,
+ low :: sigid,
+ condRes :: sigid
} deriving (Show, Eq)
+-- | Information on a signal definition
+data SignalInfo = SignalInfo {
+ sigName :: Maybe String,
+ sigTy :: Type.Type
+}
+
-- | A flattened function
data FlatFunction' sigid = FlatFunction {
- args :: [SignalDefMap sigid],
- res :: SignalUseMap sigid,
- --sigs :: [SignalDef],
+ args :: [SignalMap sigid],
+ res :: SignalMap sigid,
apps :: [FApp sigid],
- conds :: [CondDef sigid]
-} deriving (Show, Eq)
+ conds :: [CondDef sigid],
+ sigs :: [(sigid, SignalInfo)]
+}
-- | A flat function that does not have its signals named
type FlatFunction = FlatFunction' UnnamedSignal
type BindMap = [(
CoreBndr, -- ^ The bind name
Either -- ^ The bind value which is either
- (SignalUseMap UnnamedSignal)
+ (SignalMap UnnamedSignal)
-- ^ a signal
(
HsValueUse, -- ^ or a HighOrder function
- [SignalUse UnnamedSignal] -- ^ With these signals already applied to it
+ [UnnamedSignal] -- ^ With these signals already applied to it
)
)]
-- | The state during the flattening of a single function
-type FlattenState = State.State ([FApp UnnamedSignal], [CondDef UnnamedSignal], UnnamedSignal)
+type FlattenState = State.State ([FApp UnnamedSignal], [CondDef UnnamedSignal], [(UnnamedSignal, SignalInfo)], UnnamedSignal)
-- | Add an application to the current FlattenState
addApp :: (FApp UnnamedSignal) -> FlattenState ()
addApp a = do
- (apps, conds, n) <- State.get
- State.put (a:apps, conds, n)
+ (apps, conds, sigs, n) <- State.get
+ State.put (a:apps, conds, sigs, n)
-- | Add a conditional definition to the current FlattenState
addCondDef :: (CondDef UnnamedSignal) -> FlattenState ()
addCondDef c = do
- (apps, conds, n) <- State.get
- State.put (apps, c:conds, n)
+ (apps, conds, sigs, n) <- State.get
+ State.put (apps, c:conds, sigs, n)
-- | Generates a new signal id, which is unique within the current flattening.
-genSignalId :: FlattenState UnnamedSignal
-genSignalId = do
- (apps, conds, n) <- State.get
- State.put (apps, conds, n+1)
+genSignalId :: Type.Type -> FlattenState UnnamedSignal
+genSignalId ty = do
+ (apps, conds, sigs, n) <- State.get
+ -- Generate a new numbered but unnamed signal
+ let s = (n, SignalInfo Nothing ty)
+ State.put (apps, conds, s:sigs, n+1)
return n
-