----------------------------------------------------------------------------- -- -- Pretty-printing assembly language -- -- (c) The University of Glasgow 1993-2005 -- ----------------------------------------------------------------------------- {-# OPTIONS_GHC -fno-warn-orphans #-} module PPC.Ppr (pprNatCmmDecl) where import GhcPrelude import PPC.Regs import PPC.Instr import PPC.Cond import PprBase import Instruction import Format import Reg import RegClass import TargetReg import Cmm hiding (topInfoTable) import Hoopl.Collections import Hoopl.Label import BlockId import CLabel import Unique ( pprUniqueAlways, getUnique ) import Platform import FastString import Outputable import DynFlags import Data.Word import Data.Int import Data.Bits -- ----------------------------------------------------------------------------- -- Printing this stuff out pprNatCmmDecl :: NatCmmDecl CmmStatics Instr -> SDoc pprNatCmmDecl (CmmData section dats) = pprSectionAlign section $$ pprDatas dats pprNatCmmDecl proc@(CmmProc top_info lbl _ (ListGraph blocks)) = case topInfoTable proc of Nothing -> sdocWithPlatform $ \platform -> case blocks of [] -> -- special case for split markers: pprLabel lbl blocks -> -- special case for code without info table: pprSectionAlign (Section Text lbl) $$ (case platformArch platform of ArchPPC_64 ELF_V1 -> pprFunctionDescriptor lbl ArchPPC_64 ELF_V2 -> pprFunctionPrologue lbl _ -> pprLabel lbl) $$ -- blocks guaranteed not null, -- so label needed vcat (map (pprBasicBlock top_info) blocks) Just (Statics info_lbl _) -> sdocWithPlatform $ \platform -> pprSectionAlign (Section Text info_lbl) $$ (if platformHasSubsectionsViaSymbols platform then ppr (mkDeadStripPreventer info_lbl) <> char ':' else empty) $$ vcat (map (pprBasicBlock top_info) blocks) $$ -- 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 " <+> ppr info_lbl <+> char '-' <+> ppr (mkDeadStripPreventer info_lbl) else empty) pprFunctionDescriptor :: CLabel -> SDoc pprFunctionDescriptor lab = pprGloblDecl lab $$ text "\t.section \".opd\", \"aw\"" $$ text "\t.align 3" $$ ppr lab <> char ':' $$ text "\t.quad ." <> ppr lab <> text ",.TOC.@tocbase,0" $$ text "\t.previous" $$ text "\t.type" <+> ppr lab <> text ", @function" $$ char '.' <> ppr lab <> char ':' pprFunctionPrologue :: CLabel ->SDoc pprFunctionPrologue lab = pprGloblDecl lab $$ text ".type " <> ppr lab <> text ", @function" $$ ppr lab <> char ':' $$ 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" <> ppr lab <> text ",.-" <> ppr lab pprBasicBlock :: LabelMap CmmStatics -> NatBasicBlock Instr -> SDoc pprBasicBlock info_env (BasicBlock blockid instrs) = maybe_infotable $$ pprLabel (blockLbl blockid) $$ vcat (map pprInstr instrs) where maybe_infotable = case mapLookup blockid info_env of Nothing -> empty Just (Statics info_lbl info) -> pprAlignForSection Text $$ vcat (map pprData info) $$ pprLabel info_lbl pprDatas :: CmmStatics -> SDoc pprDatas (Statics lbl dats) = vcat (pprLabel lbl : map pprData dats) pprData :: CmmStatic -> SDoc pprData (CmmString str) = pprASCII str pprData (CmmUninitialised bytes) = keyword <> int bytes where keyword = sdocWithPlatform $ \platform -> case platformOS platform of OSDarwin -> text ".space " OSAIX -> text ".space " _ -> text ".skip " pprData (CmmStaticLit lit) = pprDataItem lit pprGloblDecl :: CLabel -> SDoc pprGloblDecl lbl | not (externallyVisibleCLabel lbl) = empty | otherwise = text ".globl " <> ppr lbl pprTypeAndSizeDecl :: CLabel -> SDoc pprTypeAndSizeDecl lbl = sdocWithPlatform $ \platform -> if platformOS platform == OSLinux && externallyVisibleCLabel lbl then text ".type " <> ppr lbl <> text ", @object" else empty pprLabel :: CLabel -> SDoc pprLabel lbl = pprGloblDecl lbl $$ pprTypeAndSizeDecl lbl $$ (ppr lbl <> char ':') pprASCII :: [Word8] -> SDoc pprASCII str = vcat (map do1 str) $$ do1 0 where do1 :: Word8 -> SDoc do1 w = text "\t.byte\t" <> int (fromIntegral w) -- ----------------------------------------------------------------------------- -- pprInstr: print an 'Instr' instance Outputable Instr where ppr instr = pprInstr 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 RegVirtual (VirtualRegSSE u) -> text "%vSSE_" <> pprUniqueAlways u where ppr_reg_no :: Int -> SDoc ppr_reg_no i = sdocWithPlatform $ \platform -> case platformOS platform of OSDarwin -> ptext (case i of { 0 -> sLit "r0"; 1 -> sLit "r1"; 2 -> sLit "r2"; 3 -> sLit "r3"; 4 -> sLit "r4"; 5 -> sLit "r5"; 6 -> sLit "r6"; 7 -> sLit "r7"; 8 -> sLit "r8"; 9 -> sLit "r9"; 10 -> sLit "r10"; 11 -> sLit "r11"; 12 -> sLit "r12"; 13 -> sLit "r13"; 14 -> sLit "r14"; 15 -> sLit "r15"; 16 -> sLit "r16"; 17 -> sLit "r17"; 18 -> sLit "r18"; 19 -> sLit "r19"; 20 -> sLit "r20"; 21 -> sLit "r21"; 22 -> sLit "r22"; 23 -> sLit "r23"; 24 -> sLit "r24"; 25 -> sLit "r25"; 26 -> sLit "r26"; 27 -> sLit "r27"; 28 -> sLit "r28"; 29 -> sLit "r29"; 30 -> sLit "r30"; 31 -> sLit "r31"; 32 -> sLit "f0"; 33 -> sLit "f1"; 34 -> sLit "f2"; 35 -> sLit "f3"; 36 -> sLit "f4"; 37 -> sLit "f5"; 38 -> sLit "f6"; 39 -> sLit "f7"; 40 -> sLit "f8"; 41 -> sLit "f9"; 42 -> sLit "f10"; 43 -> sLit "f11"; 44 -> sLit "f12"; 45 -> sLit "f13"; 46 -> sLit "f14"; 47 -> sLit "f15"; 48 -> sLit "f16"; 49 -> sLit "f17"; 50 -> sLit "f18"; 51 -> sLit "f19"; 52 -> sLit "f20"; 53 -> sLit "f21"; 54 -> sLit "f22"; 55 -> sLit "f23"; 56 -> sLit "f24"; 57 -> sLit "f25"; 58 -> sLit "f26"; 59 -> sLit "f27"; 60 -> sLit "f28"; 61 -> sLit "f29"; 62 -> sLit "f30"; 63 -> sLit "f31"; _ -> sLit "very naughty powerpc register" }) _ | 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" _ -> panic "PPC.Ppr.pprFormat: no match") 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 :: Imm -> SDoc pprImm (ImmInt i) = int i pprImm (ImmInteger i) = integer i pprImm (ImmCLbl l) = ppr l pprImm (ImmIndex l i) = ppr l <> char '+' <> int i pprImm (ImmLit s) = s pprImm (ImmFloat _) = text "naughty float immediate" pprImm (ImmDouble _) = text "naughty double immediate" pprImm (ImmConstantSum a b) = pprImm a <> char '+' <> pprImm b pprImm (ImmConstantDiff a b) = pprImm a <> char '-' <> lparen <> pprImm b <> rparen pprImm (LO (ImmInt i)) = pprImm (LO (ImmInteger (toInteger i))) pprImm (LO (ImmInteger i)) = pprImm (ImmInteger (toInteger lo16)) where lo16 = fromInteger (i .&. 0xffff) :: Int16 pprImm (LO i) = sdocWithPlatform $ \platform -> if platformOS platform == OSDarwin then hcat [ text "lo16(", pprImm i, rparen ] else pprImm i <> text "@l" pprImm (HI i) = sdocWithPlatform $ \platform -> if platformOS platform == OSDarwin then hcat [ text "hi16(", pprImm i, rparen ] else pprImm i <> text "@h" pprImm (HA (ImmInt i)) = pprImm (HA (ImmInteger (toInteger i))) pprImm (HA (ImmInteger i)) = pprImm (ImmInteger ha16) where ha16 = if lo16 >= 0x8000 then hi16+1 else hi16 hi16 = (i `shiftR` 16) lo16 = i .&. 0xffff pprImm (HA i) = sdocWithPlatform $ \platform -> if platformOS platform == OSDarwin then hcat [ text "ha16(", pprImm i, rparen ] else pprImm i <> text "@ha" pprImm (HIGHERA i) = sdocWithPlatform $ \platform -> if platformOS platform == OSDarwin then panic "PPC.pprImm: highera not implemented on Darwin" else pprImm i <> text "@highera" pprImm (HIGHESTA i) = sdocWithPlatform $ \platform -> if platformOS platform == OSDarwin then panic "PPC.pprImm: highesta not implemented on Darwin" else pprImm i <> text "@highesta" pprAddr :: AddrMode -> SDoc pprAddr (AddrRegReg r1 r2) = pprReg r1 <> char ',' <+> pprReg r2 pprAddr (AddrRegImm r1 (ImmInt i)) = hcat [ int i, char '(', pprReg r1, char ')' ] pprAddr (AddrRegImm r1 (ImmInteger i)) = hcat [ integer i, char '(', pprReg r1, char ')' ] pprAddr (AddrRegImm r1 imm) = hcat [ pprImm imm, char '(', pprReg r1, char ')' ] pprSectionAlign :: Section -> SDoc pprSectionAlign sec@(Section seg _) = sdocWithPlatform $ \platform -> pprSectionHeader platform sec $$ pprAlignForSection seg -- | Print appropriate alignment for the given section type. pprAlignForSection :: SectionType -> SDoc pprAlignForSection seg = sdocWithPlatform $ \platform -> let osDarwin = platformOS platform == OSDarwin ppc64 = not $ target32Bit platform in ptext $ case seg of Text -> sLit ".align 2" Data | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" ReadOnlyData | osDarwin -> sLit ".align 2" | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" RelocatableReadOnlyData | osDarwin -> sLit ".align 2" | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" UninitialisedData | osDarwin -> sLit ".align 2" | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" ReadOnlyData16 | osDarwin -> sLit ".align 4" | otherwise -> sLit ".align 4" -- TODO: This is copied from the ReadOnlyData case, but it can likely be -- made more efficient. CString | osDarwin -> sLit ".align 2" | ppc64 -> sLit ".align 3" | otherwise -> sLit ".align 2" OtherSection _ -> panic "PprMach.pprSectionAlign: unknown section" pprDataItem :: CmmLit -> SDoc pprDataItem lit = sdocWithDynFlags $ \dflags -> vcat (ppr_item (cmmTypeFormat $ cmmLitType dflags lit) lit dflags) where imm = litToImm lit archPPC_64 dflags = not $ target32Bit $ targetPlatform dflags ppr_item II8 _ _ = [text "\t.byte\t" <> pprImm imm] ppr_item II32 _ _ = [text "\t.long\t" <> pprImm imm] ppr_item II64 _ dflags | archPPC_64 dflags = [text "\t.quad\t" <> pprImm imm] ppr_item FF32 (CmmFloat r _) _ = let bs = floatToBytes (fromRational r) in map (\b -> text "\t.byte\t" <> pprImm (ImmInt b)) bs ppr_item FF64 (CmmFloat r _) _ = let bs = doubleToBytes (fromRational r) in map (\b -> text "\t.byte\t" <> pprImm (ImmInt b)) bs ppr_item II16 _ _ = [text "\t.short\t" <> pprImm imm] ppr_item II64 (CmmInt x _) dflags | not(archPPC_64 dflags) = [text "\t.long\t" <> int (fromIntegral (fromIntegral (x `shiftR` 32) :: Word32)), text "\t.long\t" <> int (fromIntegral (fromIntegral x :: Word32))] ppr_item _ _ _ = panic "PPC.Ppr.pprDataItem: no match" pprInstr :: Instr -> SDoc pprInstr (COMMENT _) = empty -- nuke 'em {- pprInstr (COMMENT s) = if platformOS platform == OSLinux then text "# " <> ftext s else text "; " <> ftext s -} pprInstr (DELTA d) = pprInstr (COMMENT (mkFastString ("\tdelta = " ++ show d))) pprInstr (NEWBLOCK _) = panic "PprMach.pprInstr: NEWBLOCK" pprInstr (LDATA _ _) = panic "PprMach.pprInstr: LDATA" {- pprInstr (SPILL reg slot) = hcat [ text "\tSPILL", char '\t', pprReg reg, comma, text "SLOT" <> parens (int slot)] pprInstr (RELOAD slot reg) = hcat [ text "\tRELOAD", char '\t', text "SLOT" <> parens (int slot), comma, pprReg reg] -} pprInstr (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" _ -> panic "PPC.Ppr.pprInstr: no match" ), case addr of AddrRegImm _ _ -> empty AddrRegReg _ _ -> char 'x', char '\t', pprReg reg, text ", ", pprAddr addr ] pprInstr (LDFAR fmt reg (AddrRegImm source off)) = sdocWithPlatform $ \platform -> vcat [ pprInstr (ADDIS (tmpReg platform) source (HA off)), pprInstr (LD fmt reg (AddrRegImm (tmpReg platform) (LO off))) ] pprInstr (LDFAR _ _ _) = panic "PPC.Ppr.pprInstr LDFAR: no match" pprInstr (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 addr ] pprInstr (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" _ -> panic "PPC.Ppr.pprInstr: no match" ), case addr of AddrRegImm _ _ -> empty AddrRegReg _ _ -> char 'x', char '\t', pprReg reg, text ", ", pprAddr addr ] pprInstr (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 addr ] pprInstr (STFAR fmt reg (AddrRegImm source off)) = sdocWithPlatform $ \platform -> vcat [ pprInstr (ADDIS (tmpReg platform) source (HA off)), pprInstr (ST fmt reg (AddrRegImm (tmpReg platform) (LO off))) ] pprInstr (STFAR _ _ _) = panic "PPC.Ppr.pprInstr STFAR: no match" pprInstr (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 addr ] pprInstr (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 addr ] pprInstr (LIS reg imm) = hcat [ char '\t', text "lis", char '\t', pprReg reg, text ", ", pprImm imm ] pprInstr (LI reg imm) = hcat [ char '\t', text "li", char '\t', pprReg reg, text ", ", pprImm imm ] pprInstr (MR reg1 reg2) | reg1 == reg2 = empty | otherwise = hcat [ char '\t', sdocWithPlatform $ \platform -> case targetClassOfReg platform reg1 of RcInteger -> text "mr" _ -> text "fmr", char '\t', pprReg reg1, text ", ", pprReg reg2 ] pprInstr (CMP fmt reg ri) = hcat [ char '\t', op, char '\t', pprReg reg, text ", ", pprRI ri ] where op = hcat [ text "cmp", pprFormat fmt, case ri of RIReg _ -> empty RIImm _ -> char 'i' ] pprInstr (CMPL fmt reg ri) = hcat [ char '\t', op, char '\t', pprReg reg, text ", ", pprRI ri ] where op = hcat [ text "cmpl", pprFormat fmt, case ri of RIReg _ -> empty RIImm _ -> char 'i' ] pprInstr (BCC cond blockid prediction) = hcat [ char '\t', text "b", pprCond cond, pprPrediction prediction, char '\t', ppr lbl ] where lbl = mkLocalBlockLabel (getUnique blockid) pprPrediction p = case p of Nothing -> empty Just True -> char '+' Just False -> char '-' pprInstr (BCCFAR cond blockid prediction) = vcat [ hcat [ text "\tb", pprCond (condNegate cond), neg_prediction, text "\t$+8" ], hcat [ text "\tb\t", ppr lbl ] ] where lbl = mkLocalBlockLabel (getUnique blockid) neg_prediction = case prediction of Nothing -> empty Just True -> char '-' Just False -> char '+' pprInstr (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', ppr lbl ] pprInstr (MTCTR reg) = hcat [ char '\t', text "mtctr", char '\t', pprReg reg ] pprInstr (BCTR _ _) = hcat [ char '\t', text "bctr" ] pprInstr (BL lbl _) = do sdocWithPlatform $ \platform -> 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.", ppr lbl ] _ -> hcat [ text "\tbl\t", ppr lbl ] pprInstr (BCTRL _) = hcat [ char '\t', text "bctrl" ] pprInstr (ADD reg1 reg2 ri) = pprLogic (sLit "add") reg1 reg2 ri pprInstr (ADDIS reg1 reg2 imm) = hcat [ char '\t', text "addis", char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprImm imm ] pprInstr (ADDO reg1 reg2 reg3) = pprLogic (sLit "addo") reg1 reg2 (RIReg reg3) pprInstr (ADDC reg1 reg2 reg3) = pprLogic (sLit "addc") reg1 reg2 (RIReg reg3) pprInstr (ADDE reg1 reg2 reg3) = pprLogic (sLit "adde") reg1 reg2 (RIReg reg3) pprInstr (ADDZE reg1 reg2) = pprUnary (sLit "addze") reg1 reg2 pprInstr (SUBF reg1 reg2 reg3) = pprLogic (sLit "subf") reg1 reg2 (RIReg reg3) pprInstr (SUBFO reg1 reg2 reg3) = pprLogic (sLit "subfo") reg1 reg2 (RIReg reg3) pprInstr (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 ri ] pprInstr (SUBFE reg1 reg2 reg3) = pprLogic (sLit "subfe") reg1 reg2 (RIReg reg3) pprInstr (MULL fmt reg1 reg2 ri) = pprMul fmt reg1 reg2 ri pprInstr (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 ] pprInstr (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" ] ] pprInstr (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 ] pprInstr (DIV fmt sgn reg1 reg2 reg3) = pprDiv fmt sgn reg1 reg2 reg3 -- for some reason, "andi" doesn't exist. -- we'll use "andi." instead. pprInstr (AND reg1 reg2 (RIImm imm)) = hcat [ char '\t', text "andi.", char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprImm imm ] pprInstr (AND reg1 reg2 ri) = pprLogic (sLit "and") reg1 reg2 ri pprInstr (ANDC reg1 reg2 reg3) = pprLogic (sLit "andc") reg1 reg2 (RIReg reg3) pprInstr (NAND reg1 reg2 reg3) = pprLogic (sLit "nand") reg1 reg2 (RIReg reg3) pprInstr (OR reg1 reg2 ri) = pprLogic (sLit "or") reg1 reg2 ri pprInstr (XOR reg1 reg2 ri) = pprLogic (sLit "xor") reg1 reg2 ri pprInstr (ORIS reg1 reg2 imm) = hcat [ char '\t', text "oris", char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprImm imm ] pprInstr (XORIS reg1 reg2 imm) = hcat [ char '\t', text "xoris", char '\t', pprReg reg1, text ", ", pprReg reg2, text ", ", pprImm imm ] pprInstr (EXTS fmt reg1 reg2) = hcat [ char '\t', text "exts", pprFormat fmt, char '\t', pprReg reg1, text ", ", pprReg reg2 ] pprInstr (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 ] pprInstr (NEG reg1 reg2) = pprUnary (sLit "neg") reg1 reg2 pprInstr (NOT reg1 reg2) = pprUnary (sLit "not") reg1 reg2 pprInstr (SR II32 reg1 reg2 (RIImm (ImmInt i))) | i < 0 || i > 31 = -- 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 http://ghc.haskell.org/trac/ghc/ticket/5900 pprInstr (XOR reg1 reg2 (RIReg reg2)) pprInstr (SL II32 reg1 reg2 (RIImm (ImmInt i))) | i < 0 || i > 31 = -- As above for SR, but for left shifts. -- Fixes ticket http://ghc.haskell.org/trac/ghc/ticket/10870 pprInstr (XOR reg1 reg2 (RIReg reg2)) pprInstr (SRA II32 reg1 reg2 (RIImm (ImmInt i))) | i > 31 = -- 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. pprInstr (SRA II32 reg1 reg2 (RIImm (ImmInt 31))) pprInstr (SL fmt reg1 reg2 ri) = let op = case fmt of II32 -> "slw" II64 -> "sld" _ -> panic "PPC.Ppr.pprInstr: shift illegal size" in pprLogic (sLit op) reg1 reg2 (limitShiftRI fmt ri) pprInstr (SR fmt reg1 reg2 ri) = let op = case fmt of II32 -> "srw" II64 -> "srd" _ -> panic "PPC.Ppr.pprInstr: shift illegal size" in pprLogic (sLit op) reg1 reg2 (limitShiftRI fmt ri) pprInstr (SRA fmt reg1 reg2 ri) = let op = case fmt of II32 -> "sraw" II64 -> "srad" _ -> panic "PPC.Ppr.pprInstr: shift illegal size" in pprLogic (sLit op) reg1 reg2 (limitShiftRI fmt ri) pprInstr (RLWINM reg1 reg2 sh mb me) = hcat [ text "\trlwinm\t", pprReg reg1, text ", ", pprReg reg2, text ", ", int sh, text ", ", int mb, text ", ", int me ] pprInstr (CLRLI fmt reg1 reg2 n) = hcat [ text "\tclrl", pprFormat fmt, text "i ", pprReg reg1, text ", ", pprReg reg2, text ", ", int n ] pprInstr (CLRRI fmt reg1 reg2 n) = hcat [ text "\tclrr", pprFormat fmt, text "i ", pprReg reg1, text ", ", pprReg reg2, text ", ", int n ] pprInstr (FADD fmt reg1 reg2 reg3) = pprBinaryF (sLit "fadd") fmt reg1 reg2 reg3 pprInstr (FSUB fmt reg1 reg2 reg3) = pprBinaryF (sLit "fsub") fmt reg1 reg2 reg3 pprInstr (FMUL fmt reg1 reg2 reg3) = pprBinaryF (sLit "fmul") fmt reg1 reg2 reg3 pprInstr (FDIV fmt reg1 reg2 reg3) = pprBinaryF (sLit "fdiv") fmt reg1 reg2 reg3 pprInstr (FABS reg1 reg2) = pprUnary (sLit "fabs") reg1 reg2 pprInstr (FNEG reg1 reg2) = pprUnary (sLit "fneg") reg1 reg2 pprInstr (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. -- Morever, 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 ] pprInstr (FCTIWZ reg1 reg2) = pprUnary (sLit "fctiwz") reg1 reg2 pprInstr (FCTIDZ reg1 reg2) = pprUnary (sLit "fctidz") reg1 reg2 pprInstr (FCFID reg1 reg2) = pprUnary (sLit "fcfid") reg1 reg2 pprInstr (FRSP reg1 reg2) = pprUnary (sLit "frsp") reg1 reg2 pprInstr (CRNOR dst src1 src2) = hcat [ text "\tcrnor\t", int dst, text ", ", int src1, text ", ", int src2 ] pprInstr (MFCR reg) = hcat [ char '\t', text "mfcr", char '\t', pprReg reg ] pprInstr (MFLR reg) = hcat [ char '\t', text "mflr", char '\t', pprReg reg ] pprInstr (FETCHPC reg) = vcat [ text "\tbcl\t20,31,1f", hcat [ text "1:\tmflr\t", pprReg reg ] ] pprInstr HWSYNC = text "\tsync" pprInstr ISYNC = text "\tisync" pprInstr LWSYNC = text "\tlwsync" pprInstr NOP = text "\tnop" pprInstr (UPDATE_SP fmt amount@(ImmInt offset)) | fits16Bits offset = vcat [ pprInstr (LD fmt r0 (AddrRegImm sp (ImmInt 0))), pprInstr (STU fmt r0 (AddrRegImm sp amount)) ] pprInstr (UPDATE_SP fmt amount) = sdocWithPlatform $ \platform -> let tmp = tmpReg platform in vcat [ pprInstr (LD fmt r0 (AddrRegImm sp (ImmInt 0))), pprInstr (ADDIS tmp sp (HA amount)), pprInstr (ADD tmp tmp (RIImm (LO amount))), pprInstr (STU fmt r0 (AddrRegReg sp tmp)) ] -- pprInstr _ = panic "pprInstr (ppc)" pprLogic :: LitString -> Reg -> Reg -> RI -> SDoc pprLogic 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 ri ] pprMul :: Format -> Reg -> Reg -> RI -> SDoc pprMul 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 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 :: LitString -> Reg -> Reg -> SDoc pprUnary op reg1 reg2 = hcat [ char '\t', ptext op, char '\t', pprReg reg1, text ", ", pprReg reg2 ] pprBinaryF :: LitString -> 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 :: RI -> SDoc pprRI (RIReg r) = pprReg r pprRI (RIImm r) = pprImm 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