- 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) = undef //how to deal with strings?
- 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) [] ""]
-
-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")
+// g (VarExpr _ (VarDef k fs)) = load k >>= \instr-> tell [instr] //note: pure is pure for list, i.e. []
+ 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 _ = abort "hoi"
+ g (FunExpr _ k es fs) = abort "FunExpr unsupported modderfokker"
+ // 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
+//
+//instance g Stmt where
+// g (IfStmt cond th el) =
+// fresh >>= \elseLabel->
+// fresh >>= \endLabel->
+// g cond >>|
+// tell [Instr "brf" [L elseLabel] "branch else"] >>|
+// mapM_ g th >>|
+// tell [Instr "bra" [L endLabel] "branch end if"] >>|
+// tell [Lab elseLabel] >>|
+// mapM_ g el >>|
+// tell [Lab endLabel]
+// g (WhileStmt cond th) =
+// fresh >>= \startLabel->
+// fresh >>= \endLabel ->
+// tell [Lab startLabel] >>|
+// g cond >>|
+// tell [Instr "brf" [L endLabel] "branch end while"] >>|
+// mapM_ g th >>|
+// 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) = g e
+// TupleType (t1, t2) = g e
+// ListType t = abort "listtype"
+// IdType _ = liftT (Left $ Error "PANIC: unresolved typevariable")
+// t1 ->> t2 = abort "funtype"
+// VoidType = liftT (Left $ Error "PANIC: Void vardecl")
+// _ = g e
+
+instance g FunDecl where
+ g (FunDecl _ k _ _ vds stms) =
+ //varDecls can call the enclosing function, so first reserve a label for it
+ updateAdressbook (extend k (LAB k)) >>|
+ tell [Lab k] >>|
+ //then generate functions for the VarDecls
+ getAdressbook >>= \oldMap ->
+ mapM_ g vds >>|
+ //then the main function
+// mapM_ g stms >>|
+ updateAdressbook (const oldMap) >>| pure ()
+//
+//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")