- >>| 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
+ >>| tell [Instr "stmh" [Lit 2] ""]
+ g (VarExpr _ (VarDef k fs)) = getAdressbook >>= \ab->case 'Map'.get k ab of
+ Just (ADDR t arity) = tell [Instr "ldl" [Lit t] ""] >>| mapM_ g fs >>| pure ()
+ Just (LAB l _ fn) = tell
+ [Instr "ldc" [Lit fn] ""
+ ,Instr "ldc" [Lit 0] ""
+ ,Instr "stmh" [Lit 2] ""]
+ g (FunExpr _ k es fs) = getAdressbook >>= \ab->case 'Map'.get k ab of
+ //Identifier points to function
+ Just (LAB l arity fn) = if (arity <> (length es))
+ //Function is not complete
+ ( tell
+ [Instr "ldc" [Lit fn] "Store function number"
+ ,Instr "sth" [] ""
+ ,Instr "ldc" [Lit $ length es] "Store arity"
+ ,Instr "sth" [] ""
+ ,Instr "ajs" [Lit -1] ""]
+ >>| mapM_ g es
+ >>| if (isEmpty es) (pure ()) (tell
+ [Instr "stmh" [Lit $ length es] "Store arguments"
+ ,Instr "ajs" [Lit -1] ""]))
+ //Function is complete
+ ( mapM_ g es
+ >>| jump "bsr" k
+ >>| tell
+ [Instr "ajs" [Lit $ ~(length es)] "Clean arguments"
+ ,Instr "ldr" [Raw "RR"] ""])
+ //Identifier points to variable, thus higher order function
+ Just (ADDR t arity) = if (arity <> (length es))
+ //Function is still not complete
+ ( fresh >>= \finish->fresh >>= \start->tell [
+ //Store function number
+ Instr "ldl" [Lit t] "STARTING HIGHER ORDER UPDATE"
+ ,Instr "ldh" [Lit 0] "get function number"
+ ,Instr "sth" [] "Store"
+ //Store function arity
+ ,Instr "ldl" [Lit t] "get pointer again"
+ ,Instr "ldh" [Lit 1] "get function arity"
+ ,Instr "ldc" [Lit $ length es] "add argument number"
+ ,Instr "add" [] "add"
+ ,Instr "sth" [] "Store"
+ ,Instr "ajs" [Lit -1] "Adjust pointer"
+ //load the arguments
+ ,Instr "ldl" [Lit t] ""
+ ,Instr "ldh" [Lit 1] "Load available arguments"
+ ,Instr "str" [Raw "R5"] "Store available args in register"
+ ,Instr "ldc" [Lit 0] "Store offset"
+ ,Instr "str" [Raw "R6"] "Store offset in register"
+ ,Lab start
+ ,Instr "ldr" [Raw "R5"] ""
+ ,Instr "ldc" [Lit 0] ""
+ ,Instr "eq" [] ""
+ ,Instr "brt" [L finish] "Done pushing arg, bye"
+ //Load heapadress
+ ,Instr "ldl" [Lit t] ""
+ ,Instr "ldr" [Raw "R6"] ""
+ ,Instr "add" [] "Corrected heapaddress"
+ ,Instr "ldh" [Lit 2] "Load argument"
+ ,Instr "sth" [] "And store it immediatly after"
+ //Decrease available arguments
+ ,Instr "ldr" [Raw "R5"] ""
+ ,Instr "ldc" [Lit 1] ""
+ ,Instr "sub" [] ""
+ ,Instr "str" [Raw "R5"] ""
+ //Increase available arguments
+ ,Instr "ldr" [Raw "R6"] ""
+ ,Instr "ldc" [Lit 1] ""
+ ,Instr "add" [] ""
+ ,Instr "str" [Raw "R6"] ""
+ ,Instr "bra" [L start] ""
+ ,Lab finish
+ ]
+ >>| mapM_ g es
+ >>| tell
+ [Instr "stmh" [Lit $ length es] "Store extra args"
+ ,Instr "ajs" [Lit -1] ""]
+ )
+ //Function is complete
+ ( fresh >>= \finish->fresh >>= \start->tell [
+ Instr "ldl" [Lit t] "STARTING HIGHER ORDER CALL"
+ ,Instr "ldh" [Lit 1] "Load available arguments"
+ ,Instr "str" [Raw "R5"] "Store available args in register"
+ ,Instr "ldc" [Lit 0] "Store offset"
+ ,Instr "str" [Raw "R6"] "Store offset in register"
+
+ ,Lab start
+ ,Instr "ldr" [Raw "R5"] ""
+ ,Instr "ldc" [Lit 0] ""
+ ,Instr "eq" [] ""
+ ,Instr "brt" [L finish] "Done pushing arg, bye"
+ //Load heapadress
+ ,Instr "ldl" [Lit t] ""
+ ,Instr "ldr" [Raw "R6"] ""
+ ,Instr "add" [] "Corrected heapaddress"
+ ,Instr "ldh" [Lit 2] "Load argument"
+ //Decrease available arguments
+ ,Instr "ldr" [Raw "R5"] ""
+ ,Instr "ldc" [Lit 1] ""
+ ,Instr "sub" [] ""
+ ,Instr "str" [Raw "R5"] ""
+ //Increase available arguments
+ ,Instr "ldr" [Raw "R6"] ""
+ ,Instr "ldc" [Lit 1] ""
+ ,Instr "add" [] ""
+ ,Instr "str" [Raw "R6"] ""
+ ,Instr "bra" [L start] ""
+ ,Lab finish
+ ]
+ >>| mapM_ g es
+ >>| tell
+ [Instr "ldl" [Lit t] ""
+ ,Instr "ldh" [Lit 0] "Get function number"
+ ,Instr "str" [Raw "R5"] ""
+ ,Instr "bsr" [L "1func"] ""
+ ,Instr "ldr" [Raw "MP"] ""
+ ,Instr "ldc" [Lit t] ""
+ ,Instr "add" [] ""
+ ,Instr "str" [Raw "SP"] ""
+ ,Instr "ldr" [Raw "RR"] ""
+ ]
+ )
+ Nothing = liftT (Left $ Error "Undefined function!!!")
+
+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 arity) = abort "NO ADDRESS JUMPING FFS"
+
+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 >>| 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 ar) = tell [Instr "stl" [Lit t] ""]
+ g (FunStmt k es fs) = mapM_ g es
+ >>| jump "bsr" k
+ >>| tell [Instr "ajs" [Lit (~(length 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 _ mt k e) = g e
+ >>| annote x k
+ >>| updateAdressbook (extend k (ADDR x $ arity $ fromJust mt))
+ >>| pure (x + 1)
+
+arity :: Type -> Int
+arity (_ ->> x) = 1 + arity x
+arity _ = 0
+
+addVars :: Type [String] -> (Addressbook -> Addressbook)
+addVars _ [] = id
+addVars (t ->> ts) [x:xs] = \ab->
+ extend x (ADDR (-2 - (length xs)) (arity t)) (addVars ts xs ab)
+addVars t [x] = \ab->
+ extend x (ADDR -2 0) ab