SPARC NCG: Add tabled switch

diff --git a/compiler/nativeGen/MachCodeGen.hs b/compiler/nativeGen/MachCodeGen.hs
index 081947e..4228c6c 100644 (file)
--- a/compiler/nativeGen/MachCodeGen.hs
+++ b/compiler/nativeGen/MachCodeGen.hs
@@ -4179,15 +4179,42 @@ genSwitch expr ids
         return code
 #elif sparc_TARGET_ARCH
 genSwitch expr ids
-  | opt_PIC
-  = error "MachCodeGen: sparc genSwitch PIC not finished\n"
+       | opt_PIC
+       = error "MachCodeGen: sparc genSwitch PIC not finished\n"
   
-  | otherwise
-  = error "MachCodeGen: sparc genSwitch non-PIC not finished\n"
+       | otherwise
+       = do    (e_reg, e_code) <- getSomeReg expr
+
+               base_reg        <- getNewRegNat II32
+               offset_reg      <- getNewRegNat II32
+               dst             <- getNewRegNat II32
+
+               label           <- getNewLabelNat
+               let jumpTable   = map jumpTableEntry ids
+
+               return $ e_code `appOL`
+                toOL   
+                       -- the jump table
+                       [ LDATA ReadOnlyData (CmmDataLabel label : jumpTable)
+
+                       -- load base of jump table
+                       , SETHI (HI (ImmCLbl label)) base_reg
+                       , OR    False base_reg (RIImm $ LO $ ImmCLbl label) base_reg
+                       
+                       -- the addrs in the table are 32 bits wide..
+                       , SLL   e_reg (RIImm $ ImmInt 2) offset_reg
+
+                       -- load and jump to the destination
+                       , LD    II32 (AddrRegReg base_reg offset_reg) dst
+                       , JMP   (AddrRegImm dst (ImmInt 0)) ]
+
 #else
 #error "ToDo: genSwitch"
 #endif
 
+
+-- | Convert a BlockId to some CmmStatic data
+jumpTableEntry :: Maybe BlockId -> CmmStatic
 jumpTableEntry Nothing = CmmStaticLit (CmmInt 0 wordWidth)
 jumpTableEntry (Just (BlockId id)) = CmmStaticLit (CmmLabel blockLabel)
     where blockLabel = mkAsmTempLabel id