Numbers are now encoded using a descending index

[matthijs/master-project/cλash.git] / clash / CLasH / VHDL / VHDLTools.hs

diff --git a/clash/CLasH/VHDL/VHDLTools.hs b/clash/CLasH/VHDL/VHDLTools.hs
index ab3360b8126c44950c2f9cabddf71f73f38ef0ee..521aa0850b0243d08c3623581a696e351b02f2fc 100644 (file)
--- a/clash/CLasH/VHDL/VHDLTools.hs
+++ b/clash/CLasH/VHDL/VHDLTools.hs
@@ -488,16 +488,20 @@ mkTyconTy htype =
           let enum_decs = Maybe.maybeToList enum_dec_maybe
           let enum_tys = Maybe.maybeToList enum_ty_maybe
           let ty_def = AST.TDR $ AST.RecordTypeDef (enum_decs ++ concat elemss)
-          let tupshow = mkTupleShow (enum_tys ++ concat elem_tyss) ty_id
-          MonadState.modify tsTypeFuns $ Map.insert (htype, showIdString) (showId, tupshow)
+          let aggrshow = case enum_field_maybe of 
+                          Nothing -> mkTupleShow (enum_tys ++ concat elem_tyss) ty_id
+                          Just (conLbl, EnumType tycon dcs) -> mkAdtShow conLbl dcs (map (map fst) fieldss) ty_id
+          MonadState.modify tsTypeFuns $ Map.insert (htype, showIdString) (showId, aggrshow)
           return $ Just (ty_id, Just $ Left ty_def)
     (EnumType tycon dcs) -> do
-      let elems = map mkVHDLExtId dcs
       let ty_id = mkVHDLExtId tycon
-      let ty_def = AST.TDE $ AST.EnumTypeDef elems
-      let enumShow = mkEnumShow elems ty_id
+      let possibilaties = case (length dcs) of 1 -> 1; x -> (x-1)
+      let bitsize = floor (logBase 2 (fromInteger (toInteger possibilaties)))
+      let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.DownRange (AST.PrimLit $ show bitsize) (AST.PrimLit "0")]
+      let ty_def = AST.SubtypeIn unsignedTM (Just range)
+      let enumShow = mkEnumShow dcs ty_id
       MonadState.modify tsTypeFuns $ Map.insert (htype, showIdString) (showId, enumShow)
-      return $ Just (ty_id, Just $ Left ty_def)
+      return $ Just (ty_id, Just $ Right ty_def)
     otherwise -> error $ "\nVHDLTools.mkTyconTy: Called for HType that is neiter a AggrType or EnumType: " ++ show htype
 
 -- | Create a VHDL vector type
@@ -539,7 +543,7 @@ mkNaturalTy ::
 mkNaturalTy min_bound max_bound = do
   let bitsize = floor (logBase 2 (fromInteger (toInteger max_bound)))
   let ty_id = mkVHDLExtId $ "natural_" ++ (show min_bound) ++ "_to_" ++ (show max_bound)
-  let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit $ show min_bound) (AST.PrimLit $ show bitsize)]
+  let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.DownRange (AST.PrimLit $ show bitsize) (AST.PrimLit $ show min_bound)]
   let ty_def = AST.SubtypeIn unsignedTM (Just range)
   return (Just (ty_id, Just $ Right ty_def))
 
@@ -547,8 +551,8 @@ mkUnsignedTy ::
   Int -- ^ Haskell type of the unsigned integer
   -> TypeSession TypeMapRec
 mkUnsignedTy size = do
-  let ty_id = mkVHDLExtId $ "unsigned_" ++ show (size - 1)
-  let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (size - 1))]
+  let ty_id = mkVHDLExtId $ "unsigned_" ++ show size
+  let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.DownRange (AST.PrimLit $ show (size - 1)) (AST.PrimLit "0")]
   let ty_def = AST.SubtypeIn unsignedTM (Just range)
   return (Just (ty_id, Just $ Right ty_def))
   
@@ -556,8 +560,8 @@ mkSignedTy ::
   Int -- ^ Haskell type of the signed integer
   -> TypeSession TypeMapRec
 mkSignedTy size = do
-  let ty_id = mkVHDLExtId $ "signed_" ++ show (size - 1)
-  let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (size - 1))]
+  let ty_id = mkVHDLExtId $ "signed_" ++ show size
+  let range = AST.ConstraintIndex $ AST.IndexConstraint [AST.DownRange (AST.PrimLit $ show (size - 1)) (AST.PrimLit "0")]
   let ty_def = AST.SubtypeIn signedTM (Just range)
   return (Just (ty_id, Just $ Right ty_def))
 
@@ -593,6 +597,17 @@ getConstructorFieldLabel (AggrType _ Nothing _) =
 getConstructorFieldLabel htype =
        error $ "Can't get constructor field label from non-aggregate HType: " ++ show htype
 
+
+getConstructorIndex ::
+  HType ->
+  String ->
+  Int
+getConstructorIndex (EnumType etype cons) dc = case List.elemIndex dc cons of
+  Just (index) -> index
+  Nothing -> error $ "VHDLTools.getConstructor: constructor: " ++ show dc ++ " is not part of type: " ++ show etype ++ ", which only has constructors: " ++ show cons
+getConstructorIndex htype _ = error $ "Can't get constructor index for non-Enum type: " ++ show htype
+
+
 mktydecl :: (AST.VHDLId, Maybe (Either AST.TypeDef AST.SubtypeIn)) -> Maybe AST.PackageDecItem
 mytydecl (_, Nothing) = Nothing
 mktydecl (ty_id, Just (Left ty_def)) = Just $ AST.PDITD $ AST.TypeDec ty_id ty_def
@@ -622,16 +637,40 @@ mkTupleShow elemTMs tupleTM = AST.SubProgBody showSpec [] [showExpr]
     recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
     tupSize = length elemTMs
 
+mkAdtShow ::
+  String
+  -> [String] -- Constructors
+  -> [[String]] -- Fields for every constructor
+  -> AST.TypeMark
+  -> AST.SubProgBody
+mkAdtShow conLbl conIds elemIdss adtTM = AST.SubProgBody showSpec [] [showExpr]
+  where  
+    adtPar   = AST.unsafeVHDLBasicId "adt"
+    showSpec  = AST.Function showId [AST.IfaceVarDec adtPar adtTM] stringTM
+    showExpr  = AST.CaseSm (AST.PrimName $ AST.NSelected $ (AST.NSimple adtPar) AST.:.: (AST.SSimple $ (mkVHDLBasicId conLbl)))
+                  [AST.CaseSmAlt [AST.ChoiceE $ AST.PrimLit $ show x] [AST.ReturnSm (Just $ ((AST.PrimLit $ '"':(conIds!!x)++[' ','"'])) AST.:&: showFields x)] | x <- [0..(length conIds) -1]]
+    showFields i = if (null (elemIdss!!i)) then
+        AST.PrimLit "''"
+      else
+        foldr1 (\e1 e2 -> e1 AST.:&: AST.PrimLit "' '" AST.:&: e2) $
+              map ((genExprFCall showId).
+                    AST.PrimName .
+                    AST.NSelected .
+                    (AST.NSimple adtPar AST.:.:).
+                    tupVHDLSuffix)
+                  (map mkVHDLBasicId (elemIdss!!i))              
+    
 mkEnumShow ::
-  [AST.VHDLId]
+  [String]
   -> AST.TypeMark
   -> AST.SubProgBody
 mkEnumShow elemIds enumTM = AST.SubProgBody showSpec [] [showExpr]
-  where
-    enumPar    = AST.unsafeVHDLBasicId "enum"
+  where  
+    enumPar   = AST.unsafeVHDLBasicId "enum"
     showSpec  = AST.Function showId [AST.IfaceVarDec enumPar enumTM] stringTM
-    showExpr  = AST.ReturnSm (Just $
-                  AST.PrimLit (show $ tail $ init $ AST.fromVHDLId enumTM))
+    showExpr  = AST.CaseSm (AST.PrimName $ AST.NSimple enumPar)
+                  [AST.CaseSmAlt [AST.ChoiceE $ AST.PrimLit $ show x] [AST.ReturnSm (Just $ AST.PrimLit $ '"':(elemIds!!x)++['"'])] | x <- [0..(length elemIds) -1]]
+            
 
 mkVectorShow ::
   AST.TypeMark -- ^ elemtype