diff options
Diffstat (limited to 'projects')
| -rw-r--r-- | projects/11/JackCompiler.hs | 84 |
1 files changed, 76 insertions, 8 deletions
diff --git a/projects/11/JackCompiler.hs b/projects/11/JackCompiler.hs index 566065d..b49dd4e 100644 --- a/projects/11/JackCompiler.hs +++ b/projects/11/JackCompiler.hs @@ -1,6 +1,6 @@ --- Jack Parser, as the coursework of Project 10 of Nand2Tetris course. +-- Jack Compiler, as the coursework of Project 11 of Nand2Tetris course. -- Author: Yuchen Pei (me@ypei.me) --- Date: 2018-01-11 +-- Date: 2018-01-12 {-# LANGUAGE FlexibleContexts #-} import Text.Parsec.Prim import Text.Parsec.Char @@ -298,6 +298,7 @@ someArgs = do many jSpace >> char ')' return exps +-- vm writer starts from here buildCTable :: [Char] -> [JClassVarDec] -> ClassTable buildCTable name xs = go 0 0 Map.empty xs @@ -314,6 +315,12 @@ buildSRTable xs = Map.fromList $ mconcat $ go <$> xs where go (JClass cName _ subs) = go' <$> subs where go' (JSubroutineDec (JSubroutineHeader kind (ty, sName) args) _) = (cName ++ "." ++ sName, (ty, kind, length args)) + +buildLTable :: [JTypeAndId] -> [JTypeAndId] -> Table +buildLTable args lcls = + (go "argument" args 0 Map.empty) `Map.union` (go "local" lcls 0 Map.empty) where + go _ [] _ t = t + go kind ((ty, name):xs) n t = go kind xs (n + 1) $ Map.insert name (ty, kind, n) t --data JSubroutineDec = JSubroutineDec JSubroutineHeader JSubroutineBody deriving (Show, Eq) --data JSubroutineHeader = JSubroutineHeader JSubroutineType JTypeAndId [JTypeAndId] deriving (Show, Eq) @@ -321,12 +328,73 @@ buildSRTable xs = Map.fromList $ mconcat $ go <$> xs where vSubroutine :: ClassTable -> JSubroutineDec -> [Char] vSubroutine cTable sub = - "function " ++ name ++ "." ++ sName ++ " " ++ show (nLcls - 1) ++ "\n" ++ - (if sType == "constructor" vNew cTable else "") - mconcat $ vStatement <$> stmts where - JSubroutineDec (JSubroutineHeader kind) - vNew (C _ _ n) = "push constant " ++ show n ++ "\ncall Memory.alloc 1\n" ++ - "pop pointer 0\n" + vFunction (cName ++ "." ++ sName) nLcls ++ + (if sType == "constructor" vNew n else "") ++ + mconcat $ vStmts where + C cName t n = cTable + JSubroutineDec (JSubroutineHeader _ (_, sName) args) (JSubroutineBody lcls stmts) = sub + nLcls = length lcls + s = buildLTable args lcls + vStmts = vStatement t s sName 0 stmts + +-- data JStatement = JLetStatment JVarId JExpression + -- | JIfStatement JExpression [JStatement] (Maybe [JStatement]) + -- | JWhileStatment JExpression [JStatement] + -- | JDoStatement JSubroutineCall + -- | JReturnStatement (Maybe JExpression) + +vStatement _ _ _ _ [] = "" + +vStatement t s name n ((JLetStatment var exp):stmts) = +-- vExpression: push the result of exp; vPopToVar: pop to the var addr + vExpression t s exp ++ vPopToVar t s var ++ vStatement t s name n stmts + +vStatement t s name n ((JIfStatement cond thenStmts elseStmts):stmts) = + vExpression t s cond ++ vNot ++ vThen thenStmts ++ + maybe (vLabel labelElse) vElse elseStmts ++ vStatement t s name (n + 1) stmts where + labelElse = name ++ ".Else" ++ show n + labelEndIf = name ++ ".Endif" ++ show n + vThen xs = vIfGoto labelElse ++ vStatement t s labelElse 0 xs + vElse xs = vGoto labelEndIf ++ vLabel labelElse ++ + vStatement t s labelIf 0 xs ++ vLabel labelEndIf + +vStatement t s name n ((JWhileStatment cond loopStmts):stmts) = + vLabel labelWhile ++ vExpression t s cond ++ vNot ++ vIfGoto labelEndWhile ++ + vStatement t s labelWhile 0 loopStmts ++ vGoto labelWhile ++ + vLabel labelEndWhile ++ vStatement t s name (n + 1) stmts where + labelWhile = name ++ ".While" ++ show n + labelEndWhile = name ++ ".EndWhile" ++ show n + +vStatement t s name n ((JDoStatement subCall):stmts) = + vSubroutineCall subCall ++ vPop "temp" 0 ++ vStatement t s name n stmts + +vStatement t s name n ((JReturnStatement ret):stmts) = + maybe (vPush "constant" 0) (vExpression t s) ret ++ vReturn ++ + vStatement t s name n stmts + +-- data JExpression = JIntConst Int + -- | JStrConst [Char] + -- | JKeywordConst [Char] -- can only be true, false, null or this + -- | JExpVar JVarId + -- | JExpCall JSubroutineCall + -- | JExpUna JUOp JExpression -- JOp can only be - or ~ here + -- | JExpBin JExpression [(JBOp, JExpression)] + +vExpression t s (JIntConst n) = push "constant" n +vExpression t s (JStrConst xs) = + + + +vNew n = vPush "constant" n ++ vCall "Memory.alloc" 1 ++ vPop "pointer" 0 +vNot = "not\n" +vReturn = "return\n" +vLabel xs = "label " ++ xs ++ "\n" +vGoto xs = "goto " ++ xs ++ "\n" +vIfGoto xs = "if-goto " ++ xs ++ "\n" +vFunction xs n = "function " ++ xs ++ " " ++ show n ++ "\n" +vCall xs n = "call " ++ xs ++ " " ++ show n ++ "\n" +vPush xs n = "push " ++ xs ++ " " ++ show n ++ "\n" +vPop xs n = "pop " ++ xs ++ " " ++ show n ++ "\n" --vClass :: JClass -> [Char] --vClass (JClass cName cVars subs) = |