codegen: shift insn

[mate.git] / Mate / X86CodeGen.hs

diff --git a/Mate/X86CodeGen.hs b/Mate/X86CodeGen.hs
index 2b820b6379274638ebf5f6c8a93042e3144c0dcd..d09304d70428463ddd400351c27fdf234be83bee 100644 (file)
--- a/Mate/X86CodeGen.hs
+++ b/Mate/X86CodeGen.hs
@@ -74,7 +74,7 @@ emitFromBB method sig cls hmap =  do
           bb_offset <- getCodeOffset
           let bbstarts' = M.insert bid bb_offset bbstarts
           defineLabel $ getLabel bid lmap
-          cs <- mapM emit' $ code bb
+          cs <- mapM emit'' $ code bb
           let calls' = calls `M.union` M.fromList (catMaybes cs)
           case successor bb of
             Return -> return (calls', bbstarts')
@@ -123,6 +123,9 @@ emitFromBB method sig cls hmap =  do
         let imm8 = is8BitOffset offset
         return $ Just (calladdr + (if imm8 then 3 else 6), trapcause imm8)
 
+    emit'' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapCause))
+    emit'' insn = newNamedLabel ("jvm_insn: " ++ show insn) >>= defineLabel >> emit' insn
+
     emit' :: J.Instruction -> CodeGen e s (Maybe (Word32, TrapCause))
     emit' (INVOKESPECIAL cpidx) = emitInvoke cpidx True
     emit' (INVOKESTATIC cpidx) = emitInvoke cpidx False
@@ -282,6 +285,7 @@ emitFromBB method sig cls hmap =  do
     emit IDIV = do pop ebx; pop eax; xor edx edx; div ebx; push eax
     emit IREM = do pop ebx; pop eax; xor edx edx; div ebx; push edx
     emit IXOR = do pop ebx; pop eax; xor eax ebx; push eax
+    emit IUSHR = do pop ecx; pop eax; sar eax cl; push eax
     emit INEG = do pop eax; neg eax; push eax
     emit (IINC x imm) =
         add (Disp (cArgs x), ebp) (s8_w32 imm)
@@ -319,10 +323,17 @@ emitFromBB method sig cls hmap =  do
     emitIF cond = let
       sid = case successor bb of TwoTarget _ t -> t; _ -> error "bad"
       l = getLabel sid lmap
-      in case cond of
-        C_EQ -> je  l; C_NE -> jne l
-        C_LT -> jl  l; C_GT -> jg  l
-        C_GE -> jge l; C_LE -> jle l
+      sid2 = case successor bb of TwoTarget t _ -> t; _ -> error "bad"
+      l2 = getLabel sid2 lmap
+      in do
+        case cond of
+          C_EQ -> je  l; C_NE -> jne l
+          C_LT -> jl  l; C_GT -> jg  l
+          C_GE -> jge l; C_LE -> jle l
+        -- TODO(bernhard): ugly workaround, to get broken emitBB working
+        --  (it didn't work for gnu/classpath/SystemProperties.java)
+        jmp l2
+
 
     callMalloc :: CodeGen e s ()
     callMalloc = do