{-# LANGUAGE LambdaCase #-} ----------------------------------------------------------------------------- -- -- Pretty-printing assembly language -- -- (c) The University of Glasgow 1993-2005 -- ----------------------------------------------------------------------------- module GHC.CmmToAsm.PPC.Ppr ( pprNatCmmDecl , pprInstr ) where import GHC.Prelude import GHC.CmmToAsm.PPC.Regs import GHC.CmmToAsm.PPC.Instr import GHC.CmmToAsm.PPC.Cond import GHC.CmmToAsm.Ppr import GHC.CmmToAsm.Format import GHC.Platform.Reg import GHC.Platform.Reg.Class import GHC.CmmToAsm.Reg.Target import GHC.CmmToAsm.Config import GHC.CmmToAsm.Types import GHC.CmmToAsm.Utils import GHC.Cmm hiding (topInfoTable) import GHC.Cmm.Dataflow.Collections import GHC.Cmm.Dataflow.Label import GHC.Cmm.BlockId import GHC.Cmm.CLabel import GHC.Cmm.Ppr.Expr () -- For Outputable instances import GHC.Types.Unique ( pprUniqueAlways, getUnique ) import GHC.Platform import GHC.Data.FastString import GHC.Utils.Outputable import GHC.Utils.Panic import Data.Word import Data.Int -- ----------------------------------------------------------------------------- -- Printing this stuff out pprNatCmmDecl :: NCGConfig -> NatCmmDecl RawCmmStatics Instr -> SDoc pprNatCmmDecl config (CmmData section dats) = pprSectionAlign config section $$ pprDatas (ncgPlatform config) dats pprNatCmmDecl config proc@(CmmProc top_info lbl _ (ListGraph blocks)) = let platform = ncgPlatform config in case topInfoTable proc of Nothing -> -- special case for code without info table: pprSectionAlign config (Section Text lbl) $$ (case platformArch platform of ArchPPC_64 ELF_V1 -> pprFunctionDescriptor platform lbl ArchPPC_64 ELF_V2 -> pprFunctionPrologue platform lbl _ -> pprLabel platform lbl) $$ -- blocks guaranteed not null, -- so label needed vcat (map (pprBasicBlock config top_info) blocks) $$ ppWhen (ncgDwarfEnabled config) (pdoc platform (mkAsmTempEndLabel lbl) <> char ':' $$ pprProcEndLabel platform lbl) $$ pprSizeDecl platform lbl Just (CmmStaticsRaw info_lbl _) -> pprSectionAlign config (Section Text info_lbl) $$ (if platformHasSubsectionsViaSymbols platform then pdoc platform (mkDeadStripPreventer info_lbl) <> char ':' else empty) $$ vcat (map (pprBasicBlock config top_info) blocks) $$ -- above: Even the first block gets a label, because with branch-chain -- elimination, it might be the target of a goto. (if platformHasSubsectionsViaSymbols platform then -- See Note [Subsections Via Symbols] in X86/Ppr.hs text "\t.long " <+> pdoc platform info_lbl <+> char '-' <+> pdoc platform (mkDeadStripPreventer info_lbl) else empty) $$ pprSizeDecl platform info_lbl -- | Output the ELF .size directive. pprSizeDecl :: Platform -> CLabel -> SDoc pprSizeDecl platform lbl = if osElfTarget (platformOS platform) then text "\t.size" <+> prettyLbl <> text ", .-" <> codeLbl else empty where prettyLbl = pdoc platform lbl codeLbl | platformArch platform == ArchPPC_64 ELF_V1 = char '.' <> prettyLbl | otherwise = prettyLbl pprFunctionDescriptor :: Platform -> CLabel -> SDoc pprFunctionDescriptor platform lab = pprGloblDecl platform lab $$ text "\t.section \".opd\", \"aw\"" $$ text "\t.align 3" $$ pdoc platform lab <> char ':' $$ text "\t.quad ." <> pdoc platform lab <> text ",.TOC.@tocbase,0" $$ text "\t.previous" $$ text "\t.type" <+> pdoc platform lab <> text ", @function" $$ char '.' <> pdoc platform lab <> char ':' pprFunctionPrologue :: Platform -> CLabel ->SDoc pprFunctionPrologue platform lab = pprGloblDecl platform lab $$ text ".type " <> pdoc platform lab <> text ", @function" $$ pdoc platform lab <> char ':' $$ text "0:\taddis\t" <> pprReg toc <> text ",12,.TOC.-0b@ha" $$ text "\taddi\t" <> pprReg toc <> char ',' <> pprReg toc <> text ",.TOC.-0b@l" $$ text "\t.localentry\t" <> pdoc platform lab <> text ",.-" <> pdoc platform lab pprProcEndLabel :: Platform -> CLabel -- ^ Procedure name -> SDoc pprProcEndLabel platform lbl = pdoc platform (mkAsmTempProcEndLabel lbl) <> char ':' pprBasicBlock :: NCGConfig -> LabelMap RawCmmStatics -> NatBasicBlock Instr -> SDoc pprBasicBlock config info_env (BasicBlock blockid instrs) = maybe_infotable $$ pprLabel platform asmLbl $$ vcat (map (pprInstr platform) instrs) $$ ppWhen (ncgDwarfEnabled config) ( pdoc platform (mkAsmTempEndLabel asmLbl) <> char ':' <> pprProcEndLabel platform asmLbl ) where asmLbl = blockLbl blockid platform = ncgPlatform config maybe_infotable = case mapLookup blockid info_env of Nothing -> empty Just (CmmStaticsRaw info_lbl info) -> pprAlignForSection platform Text $$ vcat (map (pprData platform) info) $$ pprLabel platform info_lbl pprDatas :: Platform -> RawCmmStatics -> SDoc -- See note [emit-time elimination of static indirections] in "GHC.Cmm.CLabel". pprDatas platform (CmmStaticsRaw alias [CmmStaticLit (CmmLabel lbl), CmmStaticLit ind, _, _]) | lbl == mkIndStaticInfoLabel , let labelInd (CmmLabelOff l _) = Just l labelInd (CmmLabel l) = Just l labelInd _ = Nothing , Just ind' <- labelInd ind , alias `mayRedirectTo` ind' = pprGloblDecl platform alias $$ text ".equiv" <+> pdoc platform alias <> comma <> pdoc platform (CmmLabel ind') pprDatas platform (CmmStaticsRaw lbl dats) = vcat (pprLabel platform lbl : map (pprData platform) dats) pprData :: Platform -> CmmStatic -> SDoc pprData platform d = case d of CmmString str -> pprString str CmmFileEmbed path -> pprFileEmbed path CmmUninitialised bytes -> text ".space " <> int bytes CmmStaticLit lit -> pprDataItem platform lit pprGloblDecl :: Platform -> CLabel -> SDoc pprGloblDecl platform lbl | not (externallyVisibleCLabel lbl) = empty | otherwise = text ".globl " <> pdoc platform lbl pprTypeAndSizeDecl :: Platform -> CLabel -> SDoc pprTypeAndSizeDecl platform lbl = if platformOS platform == OSLinux && externallyVisibleCLabel lbl then text ".type " <> pdoc platform lbl <> text ", @object" else empty pprLabel :: Platform -> CLabel -> SDoc pprLabel platform lbl = pprGloblDecl platform lbl $$ pprTypeAndSizeDecl platform lbl $$ (pdoc platform lbl <> char ':') -- ----------------------------------------------------------------------------- -- pprInstr: print an 'Instr' pprReg :: Reg -> SDoc pprReg r = case r of RegReal (RealRegSingle i) -> ppr_reg_no i RegReal (RealRegPair{}) -> panic "PPC.pprReg: no reg pairs on this arch" RegVirtual (VirtualRegI u) -> text "%vI_" <> pprUniqueAlways u RegVirtual (VirtualRegHi u) -> text "%vHi_" <> pprUniqueAlways u RegVirtual (VirtualRegF u) -> text "%vF_" <> pprUniqueAlways u RegVirtual (VirtualRegD u) -> text "%vD_" <> pprUniqueAlways u where ppr_reg_no :: Int -> SDoc ppr_reg_no i | i <= 31 = int i -- GPRs | i <= 63 = int (i-32) -- FPRs | otherwise = text "very naughty powerpc register" pprFormat :: Format -> SDoc pprFormat x = ptext (case x of II8 -> sLit "b" II16 -> sLit "h" II32 -> sLit "w" II64 -> sLit "d" FF32 -> sLit "fs" FF64 -> sLit "fd") pprCond :: Cond -> SDoc pprCond c = ptext (case c of { ALWAYS -> sLit ""; EQQ -> sLit "eq"; NE -> sLit "ne"; LTT -> sLit "lt"; GE -> sLit "ge"; GTT -> sLit "gt"; LE -> sLit "le"; LU -> sLit "lt"; GEU -> sLit "ge"; GU -> sLit "gt"; LEU -> sLit "le"; }) pprImm :: Platform -> Imm -> SDoc pprImm platform = \case ImmInt i -> int i ImmInteger i -> integer i ImmCLbl l -> pdoc platform l ImmIndex l i -> pdoc platform l <> char '+' <> int i ImmLit s -> s ImmFloat f -> float $ fromRational f ImmDouble d -> double $ fromRational d ImmConstantSum a b -> pprImm platform a <> char '+' <> pprImm platform b ImmConstantDiff a b -> pprImm platform a <> char '-' <> lparen <> pprImm platform b <> rparen LO (ImmInt i) -> pprImm platform (LO (ImmInteger (toInteger i))) LO (ImmInteger i) -> pprImm platform (ImmInteger (toInteger lo16)) where lo16 = fromInteger (i .&. 0xffff) :: Int16 LO i -> pprImm platform i <> text "@l" HI i -> pprImm platform i <> text "@h" HA (ImmInt i) -> pprImm platform (HA (ImmInteger (toInteger i))) HA (ImmInteger i) -> pprImm platform (ImmInteger ha16) where ha16 = if lo16 >= 0x8000 then hi16+1 else hi16 hi16 = (i `shiftR` 16) lo16 = i .&. 0xffff HA i -> pprImm platform i <> text "@ha" HIGHERA i -> pprImm platform i <> text "@highera" HIGHESTA i -> pprImm platform i <> text "@highesta" pprAddr :: Platform -> AddrMode -> SDoc pprAddr platform = \case AddrRegReg r1 r2 -> pprReg r1 <> char ',' <+> pprReg r2 AddrRegImm r1 (ImmInt i) -> hcat [ int i, char '(', pprReg r1, char ')' ] AddrRegImm r1 (ImmInteger i) -> hcat [ integer i, char '(', pprReg r1, char ')' ] AddrRegImm r1 imm -> hcat [ pprImm platform imm, char '(', pprReg r1, char ')' ] pprSectionAlign :: NCGConfig -> Section -> SDoc pprSectionAlign config sec@(Section seg _) = pprSectionHeader config sec $$ pprAlignForSection (ncgPlatform config) seg -- | Print appropriate alignment for the given section type. pprAlignForSection :: Platform -> SectionType -> SDoc pprAlignForSection platform seg = let ppc64 = not $ target32Bit platform in ptext $ case seg of Text -> sLit ".align 2" Data | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" ReadOnlyData | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" RelocatableReadOnlyData | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" UninitialisedData | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" ReadOnlyData16 -> sLit ".align 4" -- TODO: This is copied from the ReadOnlyData case, but it can likely be -- made more efficient. CString | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" OtherSection _ -> panic "PprMach.pprSectionAlign: unknown section" pprDataItem :: Platform -> CmmLit -> SDoc pprDataItem platform lit = vcat (ppr_item (cmmTypeFormat $ cmmLitType platform lit) lit) where imm = litToImm lit archPPC_64 = not $ target32Bit platform ppr_item II8 _ = [text "\t.byte\t" <> pprImm platform imm] ppr_item II16 _ = [text "\t.short\t" <> pprImm platform imm] ppr_item II32 _ = [text "\t.long\t" <> pprImm platform imm] ppr_item II64 _ | archPPC_64 = [text "\t.quad\t" <> pprImm platform imm] ppr_item II64 (CmmInt x _) | not archPPC_64 = [text "\t.long\t" <> int (fromIntegral (fromIntegral (x `shiftR` 32) :: Word32)), text "\t.long\t" <> int (fromIntegral (fromIntegral x :: Word32))] ppr_item FF32 _ = [text "\t.float\t" <> pprImm platform imm] ppr_item FF64 _ = [text "\t.double\t" <> pprImm platform imm] ppr_item _ _ = panic "PPC.Ppr.pprDataItem: no match" pprInstr :: Platform -> Instr -> SDoc pprInstr platform instr = case instr of COMMENT _ -> empty -- nuke 'em -- COMMENT s -- -> if platformOS platform == OSLinux -- then text "# " <> ftext s -- else text "; " <> ftext s LOCATION file line col _name -> text "\t.loc" <+> ppr file <+> ppr line <+> ppr col DELTA d -> pprInstr platform (COMMENT (mkFastString ("\tdelta = " ++ show d))) NEWBLOCK _ -> panic "PprMach.pprInstr: NEWBLOCK" LDATA _ _ -> panic "PprMach.pprInstr: LDATA" {- SPILL reg slot -> hcat [ text "\tSPILL", char '\t', pprReg reg, comma, text "SLOT" <> parens (int slot)] RELOAD slot reg -> hcat [ text "\tRELOAD", char '\t', text "SLOT" <> parens (int slot), comma, pprReg reg] -} LD fmt reg addr -> hcat [ char '\t', text "l", ptext (case fmt of II8 -> sLit "bz" II16 -> sLit "hz" II32 -> sLit "wz" II64 -> sLit "d" FF32 -> sLit "fs" FF64 -> sLit "fd" ), case addr of AddrRegImm _ _ -> empty AddrRegReg _ _ -> char 'x', char '\t', pprReg reg, text ", ", pprAddr platform addr ] LDFAR fmt reg (AddrRegImm source off) -> vcat [ pprInstr platform (ADDIS (tmpReg platform) source (HA off)) , pprInstr platform (LD fmt reg (AddrRegImm (tmpReg platform) (LO off))) ] LDFAR _ _ _ -> panic "PPC.Ppr.pprInstr LDFAR: no match" LDR fmt reg1 addr -> hcat [ text "\tl", case fmt of II32 -> char 'w' II64 -> char 'd' _ -> panic "PPC.Ppr.Instr LDR: no match", text "arx\t", pprReg reg1, text ", ", pprAddr platform addr ] LA fmt reg addr -> hcat [ char '\t', text "l", ptext (case fmt of II8 -> sLit "ba" II16 -> sLit "ha" II32 -> sLit "wa" II64 -> sLit "d" FF32 -> sLit "fs" FF64 -> sLit "fd" ), case addr of AddrRegImm _ _ -> empty AddrRegReg _ _ -> char 'x', char '\t', pprReg reg, text ", ", pprAddr platform addr ] ST fmt reg addr -> hcat [ char '\t', text "st", pprFormat fmt, case addr of AddrRegImm _ _ -> empty AddrRegReg _ _ -> char 'x', char '\t', pprReg reg, text ", ", pprAddr platform addr ] STFAR fmt reg (AddrRegImm source off) -> vcat [ pprInstr platform (ADDIS (tmpReg platform) source (HA off)) , pprInstr platform (ST fmt reg (AddrRegImm (tmpReg platform) (LO off))) ] STFAR _ _ _ -> panic "PPC.Ppr.pprInstr STFAR: no match" STU fmt reg addr -> hcat [ char '\t', text "st", pprFormat fmt, char 'u', case addr of AddrRegImm _ _ -> empty AddrRegReg _ _ -> char 'x', char '\t', pprReg reg, text ", ", pprAddr platform addr ] STC fmt reg1 addr -> hcat [ text "\tst", case fmt of II32 -> char 'w' II64 -> char 'd' _ -> panic "PPC.Ppr.Instr STC: no match", text "cx.\t", pprReg reg1, text ", ", pprAddr platform addr ] LIS reg imm -> hcat [ char '\t', text "lis", char '\t', pprReg reg, text ", ", pprImm platform imm ] LI reg imm -> hcat [ char '\t', text "li", char '\t', pprReg reg, text ", ", pprImm platform imm ] MR reg1 reg2 | reg1 == reg2 -> empty | otherwise -> hcat [ char '\t', case targetClassOfReg platform reg1 of RcInteger -> text "mr" _ -> text "fmr", char '\t', pprReg reg1, text ", ", pprReg reg2 ] CMP fmt reg ri -> hcat [ char '\t', op, char '\t', pprReg reg, text ", ", pprRI platform ri ] where op = hcat [ text "cmp", pprFormat fmt, case ri of RIReg _ -> empty RIImm _ -> char 'i' ] CMPL fmt reg ri -> hcat [ char '\t', op, char '\t', pprReg reg, text ", ", pprRI platform ri ] where op = hcat [ text "cmpl", pprFormat fmt, case ri of RIReg _ -> empty RIImm _ -> char 'i' ] BCC cond blockid prediction -> hcat [ char '\t', text "b", pprCond cond, pprPrediction prediction, char '\t', pdoc platform lbl ] where lbl = mkLocalBlockLabel (getUnique blockid) pprPrediction p = case p of Nothing -> empty Just True -> char '+' Just False -> char '-' BCCFAR cond blockid prediction -> vcat [ hcat [ text "\tb", pprCond (condNegate cond), neg_prediction, text "\t$+8" ], hcat [ text "\tb\t", pdoc platform lbl ] ] where lbl = mkLocalBlockLabel (getUnique blockid) neg_prediction = case prediction of Nothing -> empty Just True -> char '-' Just False -> char '+' JMP lbl _ -- We never jump to ForeignLabels; if we ever do, c.f. handling for "BL" | isForeignLabel lbl -> panic "PPC.Ppr.pprInstr: JMP to ForeignLabel" | otherwise -> hcat [ -- an alias for b that takes a CLabel char '\t', text "b", char '\t', pdoc platform lbl ] MTCTR reg -> hcat [ char '\t', text "mtctr", char '\t', pprReg reg ] BCTR _ _ _ -> hcat [ char '\t', text "bctr" ] BL lbl _ -> case platformOS platform of OSAIX -> -- On AIX, "printf" denotes a function-descriptor (for use -- by function pointers), whereas the actual entry-code -- address is denoted by the dot-prefixed ".printf" label. -- Moreover, the PPC NCG only ever emits a BL instruction -- for calling C ABI functions. Most of the time these calls -- originate from FFI imports and have a 'ForeignLabel', -- but when profiling the codegen inserts calls via -- 'emitRtsCallGen' which are 'CmmLabel's even though -- they'd technically be more like 'ForeignLabel's. hcat [ text "\tbl\t.", pdoc platform lbl ] _ -> hcat [ text "\tbl\t", pdoc platform lbl ] BCTRL _ -> hcat [ char '\t', text "bctrl" ] ADD reg1 reg2 ri -> pprLogic platform (sLit "add") reg1 reg2 ri ADDIS reg1 reg2 imm -> hcat [ char '\t', text "addis", char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprImm platform imm ] ADDO reg1 reg2 reg3 -> pprLogic platform (sLit "addo") reg1 reg2 (RIReg reg3) ADDC reg1 reg2 reg3 -> pprLogic platform (sLit "addc") reg1 reg2 (RIReg reg3) ADDE reg1 reg2 reg3 -> pprLogic platform (sLit "adde") reg1 reg2 (RIReg reg3) ADDZE reg1 reg2 -> pprUnary (sLit "addze") reg1 reg2 SUBF reg1 reg2 reg3 -> pprLogic platform (sLit "subf") reg1 reg2 (RIReg reg3) SUBFO reg1 reg2 reg3 -> pprLogic platform (sLit "subfo") reg1 reg2 (RIReg reg3) SUBFC reg1 reg2 ri -> hcat [ char '\t', text "subf", case ri of RIReg _ -> empty RIImm _ -> char 'i', text "c\t", pprReg reg1, text ", ", pprReg reg2, text ", ", pprRI platform ri ] SUBFE reg1 reg2 reg3 -> pprLogic platform (sLit "subfe") reg1 reg2 (RIReg reg3) MULL fmt reg1 reg2 ri -> pprMul platform fmt reg1 reg2 ri MULLO fmt reg1 reg2 reg3 -> hcat [ char '\t', text "mull", case fmt of II32 -> char 'w' II64 -> char 'd' _ -> panic "PPC: illegal format", text "o\t", pprReg reg1, text ", ", pprReg reg2, text ", ", pprReg reg3 ] MFOV fmt reg -> vcat [ hcat [ char '\t', text "mfxer", char '\t', pprReg reg ], hcat [ char '\t', text "extr", case fmt of II32 -> char 'w' II64 -> char 'd' _ -> panic "PPC: illegal format", text "i\t", pprReg reg, text ", ", pprReg reg, text ", 1, ", case fmt of II32 -> text "1" II64 -> text "33" _ -> panic "PPC: illegal format" ] ] MULHU fmt reg1 reg2 reg3 -> hcat [ char '\t', text "mulh", case fmt of II32 -> char 'w' II64 -> char 'd' _ -> panic "PPC: illegal format", text "u\t", pprReg reg1, text ", ", pprReg reg2, text ", ", pprReg reg3 ] DIV fmt sgn reg1 reg2 reg3 -> pprDiv fmt sgn reg1 reg2 reg3 -- for some reason, "andi" doesn't exist. -- we'll use "andi." instead. AND reg1 reg2 (RIImm imm) -> hcat [ char '\t', text "andi.", char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprImm platform imm ] AND reg1 reg2 ri -> pprLogic platform (sLit "and") reg1 reg2 ri ANDC reg1 reg2 reg3 -> pprLogic platform (sLit "andc") reg1 reg2 (RIReg reg3) NAND reg1 reg2 reg3 -> pprLogic platform (sLit "nand") reg1 reg2 (RIReg reg3) OR reg1 reg2 ri -> pprLogic platform (sLit "or") reg1 reg2 ri XOR reg1 reg2 ri -> pprLogic platform (sLit "xor") reg1 reg2 ri ORIS reg1 reg2 imm -> hcat [ char '\t', text "oris", char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprImm platform imm ] XORIS reg1 reg2 imm -> hcat [ char '\t', text "xoris", char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprImm platform imm ] EXTS fmt reg1 reg2 -> hcat [ char '\t', text "exts", pprFormat fmt, char '\t', pprReg reg1, text ", ", pprReg reg2 ] CNTLZ fmt reg1 reg2 -> hcat [ char '\t', text "cntlz", case fmt of II32 -> char 'w' II64 -> char 'd' _ -> panic "PPC: illegal format", char '\t', pprReg reg1, text ", ", pprReg reg2 ] NEG reg1 reg2 -> pprUnary (sLit "neg") reg1 reg2 NOT reg1 reg2 -> pprUnary (sLit "not") reg1 reg2 SR II32 reg1 reg2 (RIImm (ImmInt i)) -- Handle the case where we are asked to shift a 32 bit register by -- less than zero or more than 31 bits. We convert this into a clear -- of the destination register. -- Fixes ticket https://gitlab.haskell.org/ghc/ghc/issues/5900 | i < 0 || i > 31 -> pprInstr platform (XOR reg1 reg2 (RIReg reg2)) SL II32 reg1 reg2 (RIImm (ImmInt i)) -- As above for SR, but for left shifts. -- Fixes ticket https://gitlab.haskell.org/ghc/ghc/issues/10870 | i < 0 || i > 31 -> pprInstr platform (XOR reg1 reg2 (RIReg reg2)) SRA II32 reg1 reg2 (RIImm (ImmInt i)) -- PT: I don't know what to do for negative shift amounts: -- For now just panic. -- -- For shift amounts greater than 31 set all bit to the -- value of the sign bit, this also what sraw does. | i > 31 -> pprInstr platform (SRA II32 reg1 reg2 (RIImm (ImmInt 31))) SL fmt reg1 reg2 ri -> let op = case fmt of II32 -> "slw" II64 -> "sld" _ -> panic "PPC.Ppr.pprInstr: shift illegal size" in pprLogic platform (sLit op) reg1 reg2 (limitShiftRI fmt ri) SR fmt reg1 reg2 ri -> let op = case fmt of II32 -> "srw" II64 -> "srd" _ -> panic "PPC.Ppr.pprInstr: shift illegal size" in pprLogic platform (sLit op) reg1 reg2 (limitShiftRI fmt ri) SRA fmt reg1 reg2 ri -> let op = case fmt of II32 -> "sraw" II64 -> "srad" _ -> panic "PPC.Ppr.pprInstr: shift illegal size" in pprLogic platform (sLit op) reg1 reg2 (limitShiftRI fmt ri) RLWINM reg1 reg2 sh mb me -> hcat [ text "\trlwinm\t", pprReg reg1, text ", ", pprReg reg2, text ", ", int sh, text ", ", int mb, text ", ", int me ] CLRLI fmt reg1 reg2 n -> hcat [ text "\tclrl", pprFormat fmt, text "i ", pprReg reg1, text ", ", pprReg reg2, text ", ", int n ] CLRRI fmt reg1 reg2 n -> hcat [ text "\tclrr", pprFormat fmt, text "i ", pprReg reg1, text ", ", pprReg reg2, text ", ", int n ] FADD fmt reg1 reg2 reg3 -> pprBinaryF (sLit "fadd") fmt reg1 reg2 reg3 FSUB fmt reg1 reg2 reg3 -> pprBinaryF (sLit "fsub") fmt reg1 reg2 reg3 FMUL fmt reg1 reg2 reg3 -> pprBinaryF (sLit "fmul") fmt reg1 reg2 reg3 FDIV fmt reg1 reg2 reg3 -> pprBinaryF (sLit "fdiv") fmt reg1 reg2 reg3 FABS reg1 reg2 -> pprUnary (sLit "fabs") reg1 reg2 FNEG reg1 reg2 -> pprUnary (sLit "fneg") reg1 reg2 FCMP reg1 reg2 -> hcat [ char '\t', text "fcmpu\t0, ", -- Note: we're using fcmpu, not fcmpo -- The difference is with fcmpo, compare with NaN is an invalid operation. -- We don't handle invalid fp ops, so we don't care. -- Moreover, we use `fcmpu 0, ...` rather than `fcmpu cr0, ...` for -- better portability since some non-GNU assembler (such as -- IBM's `as`) tend not to support the symbolic register name cr0. -- This matches the syntax that GCC seems to emit for PPC targets. pprReg reg1, text ", ", pprReg reg2 ] FCTIWZ reg1 reg2 -> pprUnary (sLit "fctiwz") reg1 reg2 FCTIDZ reg1 reg2 -> pprUnary (sLit "fctidz") reg1 reg2 FCFID reg1 reg2 -> pprUnary (sLit "fcfid") reg1 reg2 FRSP reg1 reg2 -> pprUnary (sLit "frsp") reg1 reg2 CRNOR dst src1 src2 -> hcat [ text "\tcrnor\t", int dst, text ", ", int src1, text ", ", int src2 ] MFCR reg -> hcat [ char '\t', text "mfcr", char '\t', pprReg reg ] MFLR reg -> hcat [ char '\t', text "mflr", char '\t', pprReg reg ] FETCHPC reg -> vcat [ text "\tbcl\t20,31,1f", hcat [ text "1:\tmflr\t", pprReg reg ] ] HWSYNC -> text "\tsync" ISYNC -> text "\tisync" LWSYNC -> text "\tlwsync" NOP -> text "\tnop" pprLogic :: Platform -> PtrString -> Reg -> Reg -> RI -> SDoc pprLogic platform op reg1 reg2 ri = hcat [ char '\t', ptext op, case ri of RIReg _ -> empty RIImm _ -> char 'i', char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprRI platform ri ] pprMul :: Platform -> Format -> Reg -> Reg -> RI -> SDoc pprMul platform fmt reg1 reg2 ri = hcat [ char '\t', text "mull", case ri of RIReg _ -> case fmt of II32 -> char 'w' II64 -> char 'd' _ -> panic "PPC: illegal format" RIImm _ -> char 'i', char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprRI platform ri ] pprDiv :: Format -> Bool -> Reg -> Reg -> Reg -> SDoc pprDiv fmt sgn reg1 reg2 reg3 = hcat [ char '\t', text "div", case fmt of II32 -> char 'w' II64 -> char 'd' _ -> panic "PPC: illegal format", if sgn then empty else char 'u', char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprReg reg3 ] pprUnary :: PtrString -> Reg -> Reg -> SDoc pprUnary op reg1 reg2 = hcat [ char '\t', ptext op, char '\t', pprReg reg1, text ", ", pprReg reg2 ] pprBinaryF :: PtrString -> Format -> Reg -> Reg -> Reg -> SDoc pprBinaryF op fmt reg1 reg2 reg3 = hcat [ char '\t', ptext op, pprFFormat fmt, char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprReg reg3 ] pprRI :: Platform -> RI -> SDoc pprRI _ (RIReg r) = pprReg r pprRI platform (RIImm r) = pprImm platform r pprFFormat :: Format -> SDoc pprFFormat FF64 = empty pprFFormat FF32 = char 's' pprFFormat _ = panic "PPC.Ppr.pprFFormat: no match" -- limit immediate argument for shift instruction to range 0..63 -- for 64 bit size and 0..32 otherwise limitShiftRI :: Format -> RI -> RI limitShiftRI II64 (RIImm (ImmInt i)) | i > 63 || i < 0 = panic $ "PPC.Ppr: Shift by " ++ show i ++ " bits is not allowed." limitShiftRI II32 (RIImm (ImmInt i)) | i > 31 || i < 0 = panic $ "PPC.Ppr: 32 bit: Shift by " ++ show i ++ " bits is not allowed." limitShiftRI _ x = x