module X86.CodeGen (
cmmTopCodeGen,
+ generateJumpTableForInstr,
InstrBlock
)
size | not use_sse2 && isFloatSize sz = FF80
| otherwise = sz
--
- return (Fixed sz (getRegisterReg use_sse2 reg) nilOL)
+ return (Fixed size (getRegisterReg use_sse2 reg) nilOL)
getRegister tree@(CmmRegOff _ _)
dflags <- getDynFlagsNat
dynRef <- cmmMakeDynamicReference dflags addImportNat DataReference lbl
(tableReg,t_code) <- getSomeReg $ dynRef
- let
- jumpTable = map jumpTableEntryRel ids
-
- jumpTableEntryRel Nothing
- = CmmStaticLit (CmmInt 0 wordWidth)
- jumpTableEntryRel (Just blockid)
- = CmmStaticLit (CmmLabelDiffOff blockLabel lbl 0)
- where blockLabel = mkAsmTempLabel (getUnique blockid)
-
- op = OpAddr (AddrBaseIndex (EABaseReg tableReg)
+ let op = OpAddr (AddrBaseIndex (EABaseReg tableReg)
(EAIndex reg wORD_SIZE) (ImmInt 0))
#if x86_64_TARGET_ARCH
code = e_code `appOL` t_code `appOL` toOL [
ADD (intSize wordWidth) op (OpReg tableReg),
- JMP_TBL (OpReg tableReg) [ id | Just id <- ids ],
- LDATA Text (CmmDataLabel lbl : jumpTable)
+ JMP_TBL (OpReg tableReg) ids Text lbl
]
#else
-- HACK: On x86_64 binutils<2.17 is only able to generate PC32
-- conjunction with the hack in PprMach.hs/pprDataItem once
-- binutils 2.17 is standard.
code = e_code `appOL` t_code `appOL` toOL [
- LDATA ReadOnlyData (CmmDataLabel lbl : jumpTable),
MOVSxL II32
(OpAddr (AddrBaseIndex (EABaseReg tableReg)
(EAIndex reg wORD_SIZE) (ImmInt 0)))
(OpReg reg),
ADD (intSize wordWidth) (OpReg reg) (OpReg tableReg),
- JMP_TBL (OpReg tableReg) [ id | Just id <- ids ]
+ JMP_TBL (OpReg tableReg) ids ReadOnlyData lbl
]
#endif
#else
code = e_code `appOL` t_code `appOL` toOL [
- LDATA ReadOnlyData (CmmDataLabel lbl : jumpTable),
ADD (intSize wordWidth) op (OpReg tableReg),
- JMP_TBL (OpReg tableReg) [ id | Just id <- ids ]
+ JMP_TBL (OpReg tableReg) ids ReadOnlyData lbl
]
#endif
return code
(reg,e_code) <- getSomeReg expr
lbl <- getNewLabelNat
let
- jumpTable = map jumpTableEntry ids
op = OpAddr (AddrBaseIndex EABaseNone (EAIndex reg wORD_SIZE) (ImmCLbl lbl))
code = e_code `appOL` toOL [
- LDATA ReadOnlyData (CmmDataLabel lbl : jumpTable),
- JMP_TBL op [ id | Just id <- ids ]
+ JMP_TBL op ids ReadOnlyData lbl
]
-- in
return code
+generateJumpTableForInstr :: Instr -> Maybe (NatCmmTop Instr)
+generateJumpTableForInstr (JMP_TBL _ ids section lbl) = Just (createJumpTable ids section lbl)
+generateJumpTableForInstr _ = Nothing
+
+createJumpTable ids section lbl
+ = let jumpTable
+ | opt_PIC =
+ let jumpTableEntryRel Nothing
+ = CmmStaticLit (CmmInt 0 wordWidth)
+ jumpTableEntryRel (Just blockid)
+ = CmmStaticLit (CmmLabelDiffOff blockLabel lbl 0)
+ where blockLabel = mkAsmTempLabel (getUnique blockid)
+ in map jumpTableEntryRel ids
+ | otherwise = map jumpTableEntry ids
+ in CmmData section (CmmDataLabel lbl : jumpTable)
-- -----------------------------------------------------------------------------
-- 'condIntReg' and 'condFltReg': condition codes into registers