CodeGen for statements, no variables yet

[cc1516.git] / gen.icl

diff --git a/gen.icl b/gen.icl
index b24830e..be2c3ce 100644 (file)
--- a/gen.icl
+++ b/gen.icl
@@ -17,6 +17,7 @@ import Data.Either
 import Data.Tuple
 import Data.Functor
 import Data.Monoid
+import Data.Maybe
 import Control.Applicative
 import Control.Monad
 import Control.Monad.Trans
@@ -32,10 +33,11 @@ FALSE :== 0
 :: Instr    = Instr String [Arg] String
             | Lab Label
 :: Label :== String
-:: Arg = L Label | Lit Int
+:: Arg = L Label | Lit Int | Raw String
 :: SSMProgram :== [Instr]
 :: GenError = Error String
 :: GenMap :== 'Map'.Map String LoadPlace
+//completely change to either Stack, Heap, Register?
 :: LoadPlace    = LDA Int | LDC Int | LDH Int | LDL Int 
                 | LDR Int | LDS Int
                 | FUNC Label
@@ -88,12 +90,31 @@ instance g Stmt where
         fresh >>= \elseLabel->
         fresh >>= \endLabel->
         g cond >>|
-        tell [Instr "brf" [L elseLabel] "branch false"] >>|
+        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"
+    g (FunStmt _ _) = abort "CodeGen FunStmt unused" //not used
+    g (ReturnStmt Nothing)  = tell [Instr "ret" [] ""]
+    g (ReturnStmt (Just e)) = 
+        g e >>|
+        tell [Instr "str" [Raw "RR"] ""] >>|
+        g (ReturnStmt Nothing)
+
 
 
 op2ins :: Op2 -> String