:: SSMProgram :== [Instr]
:: GenError = Error String
:: Addressbook :== 'Map'.Map String Address
-:: Address = LAB String | ADDR Int
+:: Address = LAB String Int Int | ADDR Int Int
:: Gen a :== RWST () SSMProgram (Addressbook, [Label]) (Either GenError) a
labelStream :: [Label]
labelStream = ["lbl_" +++ toString i\\i<-[1..]]
-defaultAddressBook :: Addressbook
-defaultAddressBook = extend "print" (LAB "print")
- $ extend "read" (LAB "read")
- $ extend "isEmpty" (LAB "isEmpty")
- 'Map'.newMap
+defaultAddressBook :: [FunDecl] -> Addressbook
+defaultAddressBook fd = extend "1printint" (LAB "1printint" 1 0)
+ $ extend "1printchar" (LAB "1printchar" 1 1)
+ $ extend "read" (LAB "read" 0 2)
+ $ extend "isEmpty" (LAB "isEmpty" 1 3)
+ $ addFuncs fd 4
+ where
+ addFuncs [] _ = 'Map'.newMap
+ addFuncs [(FunDecl _ k args _ _ _):xs] n =
+ extend k (LAB k (length args) n) $ addFuncs xs (n+1)
gen :: AST -> Either String String
-gen (AST fds) = case evalRWST prog () (defaultAddressBook, labelStream) of
+gen (AST fds) = case evalRWST prog () (defaultAddressBook fds, labelStream) of
Left (Error e) = Left e
Right (_, p) = Right $ toString p
where
prog = tell [
Instr "bsr" [L "main"] "",
Instr "halt" [] ""
- ] >>| tell programContext
+ ] >>| tell (programContext fds)
>>| mapM_ g fds
-programContext :: SSMProgram
-programContext = [Lab "print" //there is no actual IO in SSM
+programContext :: [FunDecl] -> SSMProgram
+programContext x = [Lab "1func"
+ :fS ["1printint" ,"1printchar","read"
+ ,"isEmpty":map (\(FunDecl _ k _ _ _ _)->k) x] 0] ++ context
+ where
+
+ fS :: [String] Int -> SSMProgram
+ fS [] _ = []
+ fS [k:xs] n = [
+ Lab $ "1next" +++ toString n
+ ,Instr "ldr" [Raw "R5"] ""
+ ,Instr "ldc" [Lit n] $ "branch to: " +++ k
+ ,Instr "eq" [] ""
+ ,if (isEmpty xs)
+ (Instr "nop" [] "")
+ (Instr "brf" [L $ "1next" +++ (toString $ n + 1)] "")
+ ,Instr "bra" [L k] ""
+ :fS xs $ n+1]
+ context :: SSMProgram
+ context = [Lab "1printint"
,Instr "link" [Lit 0] ""
+ ,Instr "ldl" [Lit -2] "load first argument"
+ ,Instr "trap" [Lit 0] "print int"
,Instr "unlink" [] ""
,Instr "ret" [] ""
- ,Lab "read" //there is no actual IO in SSM
+ ,Lab "1printchar"
,Instr "link" [Lit 0] ""
- ,Instr "ldc" [Lit 0] ""
- ,Instr "sth" [] ""
+ ,Instr "ldl" [Lit -2] "load first argument"
+ ,Instr "trap" [Lit 1] "print char"
+ ,Instr "unlink" [] ""
+ ,Instr "ret" [] ""
+ ,Lab "read"
+ ,Instr "link" [Lit 0] ""
+ ,Instr "trap" [Lit 11] "read char"
,Instr "str" [Raw "RR"] ""
,Instr "unlink" [] ""
,Instr "ret" [] ""
,Instr "str" [Raw "RR"] ""
,Instr "unlink" [] ""
,Instr "ret" [] ""
+ ,Lab "read"
]
-//helper functions for the gen monad
getAdressbook :: Gen Addressbook
getAdressbook = gets fst
BiOr = "or"
BiCons = abort "Shit, Cons, how to deal with this?"
+instance g FieldSelector where
+ g FieldFst = tell [Instr "lda" [Lit -1] "fst"]
+ g FieldSnd = tell [Instr "lda" [Lit 0] "snd"]
+ g FieldHd = tell [Instr "lda" [Lit -1] "hd"]
+ g FieldTl = tell [Instr "lda" [Lit 0] "tl"]
+
instance g Expr where
g (IntExpr _ i) = tell [Instr "ldc" [Lit i] ""]
g (CharExpr _ c) = tell [Instr "ldc" [Lit (toInt c)] ""]
>>| 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] ""]
+ >>| tell [Instr "stmh" [Lit 2] ""]
g (VarExpr _ (VarDef k fs)) = getAdressbook >>= \ab->case 'Map'.get k ab of
- Nothing = liftT (Left $ Error "PANIC: undefined variable")
- Just (ADDR t) = tell [Instr "ldl" [Lit t] ""]
- Just (LAB t) = liftT (Left $ Error "PANIC: variable and function name clash")
- //load k >>= \instr-> tell [instr] //note: pure is pure for list, i.e. []
- g (FunExpr _ k es fs) =
- 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")
+ Just (ADDR t arity) = tell [Instr "ldl" [Lit t] ""] >>| mapM_ g fs >>| pure ()
+ Just (LAB l _ fn) = tell
+ [Instr "ldc" [Lit fn] ""
+ ,Instr "sth" [] ""
+ ,Instr "ldc" [Lit 0] ""
+ ,Instr "sth" [] ""
+ ,Instr "ajs" [Lit -1] ""]
+ Nothing = liftT $ Left $ Error "PANIC: unresolver variable expr"
+ g (LambdaExpr _ _ _) = liftT $ Left $ Error "PANIC: Lambdas should be unfolded"
+ g (FunExpr _ k es fs) = funnyStuff k es fs
+
+funnyStuff :: String [Expr] [FieldSelector] -> Gen ()
+funnyStuff 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
+ ( mapM_ g es
+ >>| tell
+ [Instr "ldc" [Lit fn] "Store function number"
+ ,Instr "sth" [] ""
+ ,Instr "str" [Raw "R7"] ""
+ ,Instr "ldc" [Lit $ length es] "Store arity"
+ ,Instr "sth" [] ""
+ ,Instr "ajs" [Lit -1] ""
+ ]
+ >>| if (isEmpty es) (pure ()) (tell
+ [Instr "stmh" [Lit $ length es] "Store arguments"
+ ,Instr "ajs" [Lit -1] ""
+ ,Instr "ldr" [Raw "R7"] ""]))
+ //Function is complete
+ ( mapM_ g es
+ >>| getAdressbook >>= \ab->(case 'Map'.get k ab of
+ Nothing = liftT (Left $ Error $ concat ["PANIC: ", k, " not found as function"])
+ Just (LAB t _ _) = tell [Instr "bsr" [L t] (k +++"()")]
+ Just (ADDR t arity) = liftT (Left $ Error "NO ADDRESS JUMPING FFS")
+ )
+ >>| 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"] "HIGHER ORDER END"
+ ,Instr "ldl" [Lit t] ""
+ ,Instr "ldh" [Lit 1] ""
+ ,Instr "neg" [] ""
+ ,Instr "ldr" [Raw "SP"] ""
+ ,Instr "add" [] ""
+ ,Instr "ldc" [Lit $ length es + 1] ""
+ ,Instr "sub" [] ""
+ ,Instr "str" [Raw "SP"] ""
+ ,Instr "ldr" [Raw "RR"] ""
+ ]
+ )
+ Nothing = liftT (Left $ Error $ "PANIC: Undefined function: " +++ k)
instance g Stmt where
g (IfStmt cond th el) =
fresh >>= \elseLabel->
fresh >>= \endLabel->
g cond >>|
- tell [Instr "brf" [L elseLabel] "branch else"] >>|
+ tell [Instr "brf" [L elseLabel] "branch else"] >>|
mapM_ g th >>|
tell [Instr "bra" [L endLabel] "branch end if"] >>|
tell [Lab elseLabel] >>|
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) = tell [Instr "stl" [Lit t] ""]
- g (FunStmt k es) = mapM_ g es
- >>| jump "bsr" k
- >>| mapM_ (const $ tell [Instr "ajs" [Lit -1] ""]) es //clean up args
- >>| pure ()
+ Just (LAB t _ _) = liftT (Left $ Error $ "PANIC: cannot assign to function")
+ Just (ADDR t ar) = case fs of
+ [] = tell [Instr "stl" [Lit t] ""]
+ _ = tell [Instr "ldl" [Lit t] ""]
+ >>| followFs fs
+ >>| tell [Instr "sta" [Lit 0] ""]
+ g (FunStmt k es fs) = funnyStuff k es fs
g (ReturnStmt Nothing) = tell [Instr "unlink" [] ""]
>>| tell [Instr "ret" [] ""]
g (ReturnStmt (Just e)) = g e
>>| tell [Instr "str" [Raw "RR"] ""]
>>| g (ReturnStmt Nothing)
+//expects the heap address to the var to slect on to be on the stack
+//and leaves the heap adress to write to on the stack
+followFs :: [FieldSelector] -> Gen()
+followFs [] = tell []
+followFs [FieldHd:fs] = tell [Instr "ldc" [Lit 1] "select hd"
+ ,Instr "sub" [] "select hd"]
+ >>| followFs fs
+followFs [FieldTl] = tell []
+followFs [FieldTl:fs] = tell [Instr "lda" [Lit 0] ""]
+ >>| followFs fs
+followFs [FieldFst:fs] = tell [Instr "ldc" [Lit 1] "select fst"
+ ,Instr "sub" [] "select fst"]
+ >>| followFs fs
+followFs [FieldSnd] = tell []
+followFs [FieldSnd:fs] = tell [Instr "lda" [Lit 0] ""]
+ >>| followFs fs
+
foldVarDecl :: Int VarDecl -> Gen Int
-foldVarDecl x (VarDecl _ _ k e) = g e
+foldVarDecl x (VarDecl _ mt k e) = g e
>>| annote x k
- >>| updateAdressbook (extend k (ADDR x)) >>| pure (x + 1)
+ >>| updateAdressbook (extend k (ADDR x $ arity $ fromJust mt))
+ >>| pure (x + 1)
+
+arity :: Type -> Int
+arity (_ ->> x) = 1 + arity x
+arity _ = 0
-addVars :: [String] -> (Addressbook -> Addressbook)
-addVars [] = id
-addVars [x:xs] = \ab->extend x (ADDR (-2 - (length xs))) (addVars xs ab)
+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
instance g FunDecl where
- g (FunDecl _ k args _ vds stms) =
+ g (FunDecl _ k args mt vds stms) =
//varDecls can call the enclosing function, so first reserve a label for it
- updateAdressbook (extend k (LAB k)) >>|
getAdressbook >>= \oldMap ->
- updateAdressbook (addVars args) >>|
+ updateAdressbook (addVars (fromJust mt) args) >>|
tell [Lab k] >>|
tell [Instr "link" [Lit 0] ""] >>|
//add the vars
foldM foldVarDecl 1 vds >>|
//and the statements
mapM_ g stms >>|
+ //Ugly hack to always return
+ g (ReturnStmt Nothing) >>|
updateAdressbook (const oldMap) >>| pure ()
annote :: Int String -> Gen ()
annote pos key =
- tell [Instr "annote" [Raw "MP", Lit pos, Lit pos, Raw "green", Raw key] ""]
+ tell [Instr "annote" [Raw "MP", Lit pos, Lit pos, Raw "black", Raw key] ""]
class print a :: a -> [String]
repositories / cc1516.git / blobdiff