implementation module gen
-import AST
+
import StdMisc
+import StdList
+import StdOverloaded
+import StdString
+from StdFunc import id
+import StdTuple
+
+import Data.Func
+import qualified Data.Map as Map
+import Data.List
+import Data.Either
+import Data.Tuple
+import Data.Functor
+import Data.Monoid
+import Control.Applicative
+import Control.Monad
+import Control.Monad.Trans
+from Text import class Text(concat), instance Text String
+
+import AST
+import RWST
+
+//Instruction is an instruction, with possible arguments and a possible comment
+//Or is a label
+TRUE :== -1
+FALSE :== 0
+:: Instr = Instr String [Arg] String
+ | Lab String
+:: Label :== String
+:: Arg = L Label | Lit Int
+:: SSMProgram :== [Instr]
+
gen :: AST -> String
-gen _ = "dummy"
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+gen _ = toString [Lab "Test"
+ ,Instr "ldc" [Lit 1] "Eerste instructie"
+ ,Instr "ldc" [Lit 2] "Tweede instructie"]
+
+
+//Scrap this, we'll need shared state when generating
+//i.e. to figure out the positions of vars relative to the
+//SP/MP/whatever or in which register they are
+//and to supply with fresh labels
+
+//The generation monad
+:: GenError = Error String
+:: GenMap :== 'Map'.Map String LoadPlace
+:: LoadPlace = LDA Int | LDC Int | LDH Int | LDL Int
+ | LDR Int | LDS Int
+ | FUNC Label
+:: Gen a :== RWST [Int] SSMProgram (GenMap, [Label]) (Either GenError) a
+
+genMap :: Gen GenMap
+genMap = gets fst
+
+class g a :: a -> Gen ()
+
+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) = 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) [] ""]
+ 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 (FunExpr _ k es fs) = mapM g es >>| jump "bra" k >>= \instr-> tell [instr]
+
+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")
+
+class print a :: a -> [String]
+
+instance print Instr where
+ print (Lab l) = [l, ":", "\n"]
+ print (Instr i args com) = ["\t", i] ++ print args ++ [" ;", com, "\n"]
+
+instance print [Arg] where
+ print args = (map toString args)
+
+instance toString Arg where
+ toString (L l) = l
+ toString (Lit int) = toString int
+
+instance toString SSMProgram where
+ toString p = concat $ intersperse " " $ map (\i-> concat $ intersperse " " $ print i) p
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repositories / cc1516.git / blobdiff