X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=gen.icl;h=bf3d7c45d61d2030d982ab3b392bfae857bc5fab;hb=9dcc80e7a580836c10157cd742eb1c805ef7311b;hp=a37fedf060fc18e27eabf4bf4617e20c4ec8143d;hpb=0550b08c78e662a4d920fb12128feb2fb44e7625;p=cc1516.git

diff --git a/gen.icl b/gen.icl
index a37fedf..bf3d7c4 100644
--- a/gen.icl
+++ b/gen.icl
@@ -32,40 +32,76 @@ FALSE :== 0
 :: Arg = L Label | Lit Int | Raw String
 :: SSMProgram :== [Instr]
 :: GenError = Error String
-:: GenMap :== 'Map'.Map String LoadPlace
-//completely change to either Stack, Heap, Register?
-:: LoadPlace    = LDA Int | LDC Int | LDH Int | LDL Int 
-                | LDR Int | LDS Int
-                | FUNC Label
-:: Gen a :== RWST Label SSMProgram (GenMap, [Label]) (Either GenError) a
+:: Addressbook :== 'Map'.Map String Address
+:: Address = LAB String | ADDR Int
+:: Gen a :== RWST () SSMProgram (Addressbook, [Label]) (Either GenError) a
 
 labelStream :: [Label]
 labelStream = ["lbl_" +++ toString i\\i<-[1..]]
 
+defaultAddressBook :: Addressbook 
+defaultAddressBook = extend "1printint" (LAB "1printint")
+	$ extend "1printchar" (LAB "1printchar")
+	$ extend "1readchar" (LAB "1readchar")
+	$ extend "1readint" (LAB "1readint")
+	$ extend "isEmpty" (LAB "isempty")
+	'Map'.newMap
+
 gen :: AST -> Either String String
-gen (AST fds) = case evalRWST prog "" ('Map'.newMap, labelStream) of
+gen (AST fds) = case evalRWST prog () (defaultAddressBook, labelStream) of
             Left (Error e) = Left e
             Right (_, p) = Right $ toString p
     where
-        prog = tell [Instr "bra" [L "main"] ""] >>| mapM_ g fds
-
-//Current issues:
-//All VarDecls are added as function, how to deal with assignments?
-//  (And when we deal with assignments, how to deal with assignments to higher order functions?)
-//Dealing with arguments
-//Dealing with types that do not fit on the Stack
-//  Probably completely change LoadPlace to a Type and a position relative to *something*
-//  And where the type determines if this position is a pointer to the heap or an
-//  unboxed value
+        prog = tell [
+			Instr "bsr" [L "main"] "",
+			Instr "halt" [] ""
+			] >>| tell programContext
+            >>| mapM_ g fds
+
+programContext :: SSMProgram
+programContext =    [Lab "1printint"
+                    ,Instr "link" [Lit 0] ""
+                    ,Instr "ldl" [Lit -2] "load first argument"
+					,Instr "trap" [Lit 0] "print int"
+                    ,Instr "unlink" [] ""
+                    ,Instr "ret" [] ""
+					,Lab "1printchar"
+                    ,Instr "link" [Lit 0] ""
+                    ,Instr "ldl" [Lit -2] "load first argument"
+					,Instr "trap" [Lit 1] "print char"
+                    ,Instr "unlink" [] ""
+                    ,Instr "ret" [] ""
+                    ,Lab "1readint"
+                    ,Instr "link" [Lit 0] ""
+					,Instr "trap" [Lit 10] "read int"
+                    ,Instr "str" [Raw "RR"] ""
+                    ,Instr "unlink" [] ""
+                    ,Instr "ret" [] ""
+                    ,Lab "1readchar"
+                    ,Instr "link" [Lit 0] ""
+					,Instr "trap" [Lit 11] "read char"
+                    ,Instr "str" [Raw "RR"] ""
+                    ,Instr "unlink" [] ""
+                    ,Instr "ret" [] ""
+                    ,Lab "isempty"
+                    ,Instr "link" [Lit 0] ""
+                    ,Instr "ldl" [Lit -2] "load prt to list"
+                    ,Instr "lda" [Lit 0] "derefrence ptr"
+                    ,Instr "ldc" [Lit 0] ""
+                    ,Instr "eq" [] "test for null pointer"
+                    ,Instr "str" [Raw "RR"] ""
+                    ,Instr "unlink" [] ""
+                    ,Instr "ret" [] ""
+                    ]
 
 //helper functions for the gen monad
-genMap :: Gen GenMap
-genMap = gets fst
+getAdressbook :: Gen Addressbook
+getAdressbook = gets fst
 
-changeGenMap :: (GenMap -> GenMap) -> Gen GenMap
-changeGenMap f = modify (appFst f) >>| genMap
+updateAdressbook :: (Addressbook -> Addressbook) -> Gen Addressbook
+updateAdressbook f = modify (appFst f) >>| getAdressbook
 
-extend :: String LoadPlace GenMap -> GenMap
+extend :: String Address Addressbook -> Addressbook
 extend k pl g = 'Map'.put k pl g 
 
 fresh :: Gen Label
@@ -75,22 +111,66 @@ fresh = gets snd >>= \vars->
 
 class g a :: a -> Gen ()
 
+instance g Op1 where
+	g UnNegation = tell [Instr "not" [] ""]
+	g UnMinus = tell [Instr "neg" [] ""]
+
+instance g Op2 where
+	g o = tell [Instr s [] ""]
+		where
+			s = case o of
+    		    BiPlus = "add"
+				BiMinus = "sub"
+    		    BiTimes = "mul"
+    		    BiDivide = "div"
+    		    BiMod = "mod"
+    		    BiEquals = "eq"
+    		    BiLesser = "lt"
+    		    BiGreater = "gt"
+    		    BiLesserEq = "le"
+    		    BiGreaterEq = "ge"
+    		    BiUnEqual = "ne"
+    		    BiAnd =  "and"
+    		    BiOr = "or"
+    		    BiCons = abort "Shit, Cons, how to deal with this?"
+
+instance g FieldSelector where
+	g FieldFst = tell [Instr "lda" [Lit 0] "fst"]
+	g FieldSnd = tell [Instr "lda" [Lit 1] "snd"]
+	g FieldHd = tell [Instr "lda" [Lit -1] "hd"]
+	g FieldTl = tell [Instr "lda" [Lit 0] "tl"]
+
 instance g Expr where
-    g (VarExpr _ (VarDef k fs)) = load k >>= \instr-> tell [instr] //note: pure is pure for list, i.e. []
-    g (IntExpr _ i) = loadP (LDC i) >>= \instr-> tell [instr]
-    g (CharExpr _ c) = abort "How to deal with chars?"
-    g (BoolExpr _ True) = loadP (LDC TRUE) >>= \instr-> tell [instr]
-    g (BoolExpr _ False) = loadP (LDC FALSE) >>= \instr-> tell [instr]
-    g (Op2Expr _ e1 op e2) = g e1 >>| g e2 >>| tell [Instr (op2ins op) [] ""]
-    g (Op1Expr _ UnNegation e) = g e >>| tell [Instr "not" [] ""]
-    g (Op1Expr _ UnMinus e) = g e >>| tell [Instr "neg" [] ""]
-    g (EmptyListExpr _) = abort "Shit, empty list expr"
-    g (TupleExpr p (e1,e2)) = abort "How to deal with tuples?"
+    g (IntExpr _ i) = tell [Instr "ldc" [Lit i] ""]
+    g (CharExpr _ c) = tell [Instr "ldc" [Lit (toInt c)] ""]
+	g (BoolExpr _ b) = tell [Instr "ldc" [Lit (if b TRUE FALSE)] ""]
+    g (EmptyListExpr _) = tell [Instr "ldc" [Lit 0] ""]
+		>>| tell [Instr "sth" [] ""]
+    g (Op1Expr _ o e) = g e >>| g o
+    g (Op2Expr _ e1 BiCons e2) = g e2 >>| g e1
+		>>| tell [Instr "sth" [] ""]
+		>>| tell [Instr "ajs" [Lit -1] ""]
+		>>| tell [Instr "sth" [] ""]
+    g (Op2Expr _ e1 op e2) = g e1 >>| g e2 >>| g op
+    g (TupleExpr _ (e1,e2)) = g e1
+		>>| tell [Instr "sth" [] ""]
+		>>| g e2
+		>>| tell [Instr "sth" [] ""]
+		>>| tell [Instr "ajs" [Lit -1] ""]
+    g (VarExpr _ (VarDef k fs)) = getAdressbook >>= \ab->case 'Map'.get k ab of
+		Just (ADDR t) = tell [Instr "ldl" [Lit t] ""] >>| mapM_ g fs >>| pure ()
+		_ = liftT (Left $ Error "PANIC: variable and function name clash")
     g (FunExpr _ k es fs) = 
-        mapM g es >>| //put all arguments on the stack (todo: fix argument handling!)
-        jump "bsr" k >>= \instr-> 
-        tell [instr] >>| //actually branch to function
-        tell [Instr "ldr" [Raw "RR"] ""] //push return value on stack, todo: check for VOID
+		mapM_ g es
+		>>| jump "bsr" k
+        >>| mapM_ (const $ tell [Instr "ajs" [Lit -1] ""]) es //clean up args
+		>>| tell [Instr "ldr" [Raw "RR"] ""]
+
+jump :: String String -> Gen ()
+jump instr k = getAdressbook >>= \ab->case 'Map'.get k ab of
+	Nothing = liftT (Left $ Error $ concat ["PANIC: ", k, " not found as function"])
+	Just (LAB t) = tell [Instr instr [L t] (k +++"()")]
+	Just (ADDR t) = liftT (Left $ Error $ "PANIC: jump should go to label")
 
 instance g Stmt where
     g (IfStmt cond th el) = 
@@ -113,81 +193,47 @@ instance g Stmt where
         tell [Instr "bra" [L startLabel] "branch start while"] >>|
         tell [Lab endLabel]
     g (AssStmt (VarDef k fs) e) = 
-        g e >>|
-        abort "Shit, an assignment, figure out something with storing vars or something"
-        //vars will be on stack in locals (possible pointers to heap)
-    g (FunStmt _ _) = abort "CodeGen, FunStmt unused" //not used
-    g (ReturnStmt Nothing)  = tell [Instr "ret" [] ""] //NOTE! Assumes only return address on stack, safe?
-    g (ReturnStmt (Just e)) = 
-        g e >>|
-        tell [Instr "str" [Raw "RR"] ""] >>|
-        g (ReturnStmt Nothing)
-
-instance g VarDecl where
-    g (VarDecl _ Nothing _ _) = liftT (Left $ Error "PANIC: untyped vardecl")
-    g (VarDecl _ (Just t) k e) = 
-        (\l->k+++"_"+++l) <$> fresh >>= \lbl->
-        changeGenMap (extend k (FUNC lbl)) >>|
-        tell [Lab lbl] >>|
-        g e >>| 
-        tell [Instr "str" [Raw "RR"] ""] >>|
-        tell [Instr "ret" [] ""]
-
+        g e >>| getAdressbook >>= \ab->case 'Map'.get k ab of
+            Nothing = liftT (Left $ Error $ concat ["PANIC: ", k, " not found as var"])
+            Just (LAB t) = liftT (Left $ Error $ "PANIC: cannot assign to function")
+            Just (ADDR t) = tell [Instr "stl" [Lit t] ""]
+    g (FunStmt k es fs) = mapM_ g es 
+        >>| jump "bsr" k
+        >>| mapM_ (const $ tell [Instr "ajs" [Lit -1] ""]) es //clean up args
+        >>| mapM_ g fs
+		>>| pure ()
+    g (ReturnStmt Nothing) = tell [Instr "unlink" [] ""]
+		>>| tell [Instr "ret" [] ""]
+    g (ReturnStmt (Just e)) = g e
+		>>| tell [Instr "str" [Raw "RR"] ""] 
+		>>| g (ReturnStmt Nothing)
+
+foldVarDecl :: Int VarDecl -> Gen Int
+foldVarDecl x (VarDecl _ _ k e) = g e 
+    >>| annote x k
+	>>| updateAdressbook (extend k (ADDR x)) >>| pure (x + 1)
+
+addVars :: [String] -> (Addressbook -> Addressbook)
+addVars [] = id
+addVars [x:xs] = \ab->extend x (ADDR (-2 - (length xs))) (addVars xs ab)
 
 instance g FunDecl where
-    g (FunDecl _ k _ _ vds stms) = 
+    g (FunDecl _ k args _ vds stms) = 
         //varDecls can call the enclosing function, so first reserve a label for it 
-        (\l-> if (k=="main") "main" (l+++"_"+++k)) <$> fresh >>= \lbl->
-        changeGenMap (extend k (FUNC lbl)) >>|
-        //then generate functions for the VarDecls
-        genMap >>= \oldMap ->
-        mapM_ g vds  >>|
-        //then the main function 
-        tell [Lab lbl] >>|
+        updateAdressbook (extend k (LAB k)) >>|
+        getAdressbook >>= \oldMap ->
+		updateAdressbook (addVars args) >>|
+        tell [Lab k] >>|
+		tell [Instr "link" [Lit 0] ""] >>|
+        //add the vars
+        foldM foldVarDecl 1 vds  >>|
+        //and the statements
         mapM_ g stms >>|
-        changeGenMap (const oldMap) >>| pure ()
-
-op2ins :: Op2 -> String
-op2ins op = case op of
-    BiPlus = "add"
-    BiMinus = "sub"
-    BiTimes = "mul"
-    BiDivide = "div" 
-    BiMod = "mod"
-    BiEquals = "eq"
-    BiLesser = "lt"
-    BiGreater = "gt"
-    BiLesserEq = "le"
-    BiGreaterEq = "ge"
-    BiUnEqual = "ne"
-    BiAnd = "and"
-    BiOr = "or"
-    BiCons = abort "Shit, Cons, how to deal with this?"
-
-load :: String -> Gen Instr
-load k = genMap >>= \g-> case 'Map'.member k g of
-    False = liftT (Left $ Error $ concat ["PANIC: ", k, " not found in variable mapping"])
-    True = loadP $ 'Map'.find k g
-
-loadP :: LoadPlace -> Gen Instr
-loadP pl = dec pl >>= \(instr, arg)-> pure $ Instr instr [arg] ""
-where
-    dec (LDA i) = pure ("lda", Lit i)
-    dec (LDC i) = pure ("ldc", Lit i)
-    dec (LDH i) = pure ("ldh", Lit i)
-    dec (LDL i) = pure ("ldl", Lit i)
-    dec (LDR i) = pure ("ldr", Lit i)
-    dec (LDS i) = pure ("lds", Lit i)
-    dec _       = liftT (Left $ Error "PANIC: trying to load non adres")
-
-//Instruction (String), key of function to jump to    
-jump :: String String -> Gen Instr
-jump instr k = genMap >>= \g-> case 'Map'.member k g of
-    False = liftT (Left $ Error $ concat ["PANIC: ", k, " not found as function"])
-    True = dec ('Map'.find k g) >>= \lbl-> pure $ Instr instr [lbl] (k +++"()") 
-where
-    dec (FUNC l) = pure (L l)
-    dec _ = liftT (Left $ Error "PANIC: trying to jump to non label")
+        updateAdressbook (const oldMap) >>| pure ()
+
+annote :: Int String -> Gen ()
+annote pos key = 
+    tell [Instr "annote" [Raw "MP", Lit pos, Lit pos, Raw "green", Raw key] ""]
 
 class print a :: a -> [String]