module FlattenTypes where
+import qualified Maybe
import Data.Traversable
+import qualified Data.Foldable as Foldable
import qualified Control.Monad.State as State
import CoreSyn
+import qualified Type
import HsValueMap
-- | A signal identifier
type SignalId = Int
--- | A use of a signal
-data SignalUse = SignalUse {
- sigUseId :: SignalId
-} deriving (Show, Eq)
-
--- | A def of a signal
-data SignalDef = SignalDef {
- sigDefId :: SignalId
-} deriving (Show, Eq)
-
--- | A map of a Haskell value to signal uses
-type SignalUseMap = HsValueMap SignalUse
--- | A map of a Haskell value to signal defs
-type SignalDefMap = HsValueMap SignalDef
-
--- | Translate a SignalUseMap to an equivalent SignalDefMap
-useMapToDefMap :: SignalUseMap -> SignalDefMap
-useMapToDefMap = fmap (\(SignalUse u) -> SignalDef u)
-
--- | Translate a SignalDefMap to an equivalent SignalUseMap
-defMapToUseMap :: SignalDefMap -> SignalUseMap
-defMapToUseMap = fmap (\(SignalDef u) -> SignalUse u)
+-- | A map of a Haskell value to signal ids
+type SignalMap = HsValueMap SignalId
-- | How is a given (single) value in a function's type (ie, argument or
-- return value) used?
}
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 = FApp {
appFunc :: HsFunction,
- appArgs :: [SignalUseMap],
- appRes :: SignalDefMap
+ appArgs :: [SignalMap],
+ appRes :: SignalMap
} deriving (Show, Eq)
-- | A conditional signal definition
data CondDef = CondDef {
- cond :: SignalUse,
- high :: SignalUse,
- low :: SignalUse,
- condRes :: SignalDef
+ cond :: SignalId,
+ high :: SignalId,
+ low :: SignalId,
+ condRes :: SignalId
} deriving (Show, Eq)
+-- | How is a given signal used in the resulting VHDL?
+data SigUse =
+ SigPortIn -- | Use as an input port
+ | SigPortOut -- | Use as an input port
+ | SigInternal -- | Use as an internal signal
+ | SigStateOld Int -- | Use as the current internal state
+ | SigStateNew Int -- | Use as the new internal state
+ | SigSubState -- | Do not use, state variable is used in a subcircuit
+
+-- | Is this a port signal use?
+isPortSigUse :: SigUse -> Bool
+isPortSigUse SigPortIn = True
+isPortSigUse SigPortOut = True
+isPortSigUse _ = False
+
+-- | Is this a state signal use? Returns false for substate.
+isStateSigUse :: SigUse -> Bool
+isStateSigUse (SigStateOld _) = True
+isStateSigUse (SigStateNew _) = True
+isStateSigUse _ = False
+
+-- | Is this an internal signal use?
+isInternalSigUse :: SigUse -> Bool
+isInternalSigUse SigInternal = True
+isInternalSigUse _ = False
+
+-- | Information on a signal definition
+data SignalInfo = SignalInfo {
+ sigName :: Maybe String,
+ sigUse :: SigUse,
+ sigTy :: Type.Type
+}
+
-- | A flattened function
data FlatFunction = FlatFunction {
- args :: [SignalDefMap],
- res :: SignalUseMap,
- --sigs :: [SignalDef],
- apps :: [FApp],
- conds :: [CondDef]
-} deriving (Show, Eq)
+ flat_args :: [SignalMap],
+ flat_res :: SignalMap,
+ flat_apps :: [FApp],
+ flat_conds :: [CondDef],
+ flat_sigs :: [(SignalId, SignalInfo)]
+}
+
+-- | Lookup a given signal id in a signal map, and return the associated
+-- SignalInfo. Errors out if the signal was not found.
+signalInfo :: [(SignalId, SignalInfo)] -> SignalId -> SignalInfo
+signalInfo sigs id = Maybe.fromJust $ lookup id sigs
-- | A list of binds in effect at a particular point of evaluation
type BindMap = [(
CoreBndr, -- ^ The bind name
Either -- ^ The bind value which is either
- SignalUseMap -- ^ a signal
+ (SignalMap)
+ -- ^ a signal
(
HsValueUse, -- ^ or a HighOrder function
- [SignalUse] -- ^ With these signals already applied to it
+ [SignalId] -- ^ With these signals already applied to it
)
)]
-- | The state during the flattening of a single function
-type FlattenState = State.State ([FApp], [CondDef], SignalId)
+type FlattenState = State.State ([FApp], [CondDef], [(SignalId, SignalInfo)], SignalId)
-- | Add an application to the current FlattenState
-addApp :: FApp -> FlattenState ()
+addApp :: (FApp) -> 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 -> FlattenState ()
+addCondDef :: (CondDef) -> 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 SignalId
-genSignalId = do
- (apps, conds, n) <- State.get
- State.put (apps, conds, n+1)
+genSignalId :: SigUse -> Type.Type -> FlattenState SignalId
+genSignalId use ty = do
+ (apps, conds, sigs, n) <- State.get
+ -- Generate a new numbered but unnamed signal
+ let s = (n, SignalInfo Nothing use ty)
+ State.put (apps, conds, s:sigs, n+1)
return n
-
projects / matthijs / master-project / cλash.git / blobdiff