1 -----------------------------------------------------------------------------
3 -- Pretty-printing assembly language
5 -- (c) The University of Glasgow 1993-2005
7 -----------------------------------------------------------------------------
23 #include "nativeGen/NCG.h"
24 #include "HsVersions.h"
41 import Unique ( pprUnique )
44 import qualified Outputable
45 import Outputable ( Outputable, panic )
51 -- -----------------------------------------------------------------------------
52 -- Printing this stuff out
54 pprNatCmmTop :: NatCmmTop Instr -> Doc
55 pprNatCmmTop (CmmData section dats) =
56 pprSectionHeader section $$ vcat (map pprData dats)
58 -- special case for split markers:
59 pprNatCmmTop (CmmProc [] lbl _ (ListGraph [])) = pprLabel lbl
61 pprNatCmmTop (CmmProc info lbl _ (ListGraph blocks)) =
62 pprSectionHeader Text $$
63 (if null info then -- blocks guaranteed not null, so label needed
66 #if HAVE_SUBSECTIONS_VIA_SYMBOLS
67 pprCLabel_asm (mkDeadStripPreventer $ entryLblToInfoLbl lbl)
70 vcat (map pprData info) $$
71 pprLabel (entryLblToInfoLbl lbl)
73 vcat (map pprBasicBlock blocks)
74 -- above: Even the first block gets a label, because with branch-chain
75 -- elimination, it might be the target of a goto.
76 #if HAVE_SUBSECTIONS_VIA_SYMBOLS
77 -- If we are using the .subsections_via_symbols directive
78 -- (available on recent versions of Darwin),
79 -- we have to make sure that there is some kind of reference
80 -- from the entry code to a label on the _top_ of of the info table,
81 -- so that the linker will not think it is unreferenced and dead-strip
82 -- it. That's why the label is called a DeadStripPreventer (_dsp).
85 <+> pprCLabel_asm (entryLblToInfoLbl lbl)
87 <+> pprCLabel_asm (mkDeadStripPreventer $ entryLblToInfoLbl lbl)
92 pprBasicBlock :: NatBasicBlock Instr -> Doc
93 pprBasicBlock (BasicBlock (BlockId id) instrs) =
94 pprLabel (mkAsmTempLabel id) $$
95 vcat (map pprInstr instrs)
98 pprData :: CmmStatic -> Doc
99 pprData (CmmAlign bytes) = pprAlign bytes
100 pprData (CmmDataLabel lbl) = pprLabel lbl
101 pprData (CmmString str) = pprASCII str
104 pprData (CmmUninitialised bytes) = ptext (sLit ".space ") <> int bytes
106 pprData (CmmUninitialised bytes) = ptext (sLit ".skip ") <> int bytes
109 pprData (CmmStaticLit lit) = pprDataItem lit
111 pprGloblDecl :: CLabel -> Doc
113 | not (externallyVisibleCLabel lbl) = empty
114 | otherwise = ptext IF_ARCH_sparc((sLit ".global "),
118 pprTypeAndSizeDecl :: CLabel -> Doc
120 pprTypeAndSizeDecl lbl
121 | not (externallyVisibleCLabel lbl) = empty
122 | otherwise = ptext (sLit ".type ") <>
123 pprCLabel_asm lbl <> ptext (sLit ", @object")
129 pprLabel :: CLabel -> Doc
130 pprLabel lbl = pprGloblDecl lbl $$ pprTypeAndSizeDecl lbl $$ (pprCLabel_asm lbl <> char ':')
133 pprASCII :: [Word8] -> Doc
135 = vcat (map do1 str) $$ do1 0
138 do1 w = ptext (sLit "\t.byte\t") <> int (fromIntegral w)
140 pprAlign :: Int -> Doc
142 ptext (sLit ".align ") <> int pow2
146 log2 :: Int -> Int -- cache the common ones
151 log2 n = 1 + log2 (n `quot` 2)
154 -- -----------------------------------------------------------------------------
155 -- pprInstr: print an 'Instr'
157 instance Outputable Instr where
158 ppr instr = Outputable.docToSDoc $ pprInstr instr
161 pprUserReg :: Reg -> Doc
168 RegReal (RealRegSingle i) -> ppr_reg_no i
169 RegReal (RealRegPair{}) -> panic "PPC.pprReg: no reg pairs on this arch"
170 RegVirtual (VirtualRegI u) -> text "%vI_" <> asmSDoc (pprUnique u)
171 RegVirtual (VirtualRegHi u) -> text "%vHi_" <> asmSDoc (pprUnique u)
172 RegVirtual (VirtualRegF u) -> text "%vF_" <> asmSDoc (pprUnique u)
173 RegVirtual (VirtualRegD u) -> text "%vD_" <> asmSDoc (pprUnique u)
176 ppr_reg_no :: Int -> Doc
179 0 -> sLit "r0"; 1 -> sLit "r1";
180 2 -> sLit "r2"; 3 -> sLit "r3";
181 4 -> sLit "r4"; 5 -> sLit "r5";
182 6 -> sLit "r6"; 7 -> sLit "r7";
183 8 -> sLit "r8"; 9 -> sLit "r9";
184 10 -> sLit "r10"; 11 -> sLit "r11";
185 12 -> sLit "r12"; 13 -> sLit "r13";
186 14 -> sLit "r14"; 15 -> sLit "r15";
187 16 -> sLit "r16"; 17 -> sLit "r17";
188 18 -> sLit "r18"; 19 -> sLit "r19";
189 20 -> sLit "r20"; 21 -> sLit "r21";
190 22 -> sLit "r22"; 23 -> sLit "r23";
191 24 -> sLit "r24"; 25 -> sLit "r25";
192 26 -> sLit "r26"; 27 -> sLit "r27";
193 28 -> sLit "r28"; 29 -> sLit "r29";
194 30 -> sLit "r30"; 31 -> sLit "r31";
195 32 -> sLit "f0"; 33 -> sLit "f1";
196 34 -> sLit "f2"; 35 -> sLit "f3";
197 36 -> sLit "f4"; 37 -> sLit "f5";
198 38 -> sLit "f6"; 39 -> sLit "f7";
199 40 -> sLit "f8"; 41 -> sLit "f9";
200 42 -> sLit "f10"; 43 -> sLit "f11";
201 44 -> sLit "f12"; 45 -> sLit "f13";
202 46 -> sLit "f14"; 47 -> sLit "f15";
203 48 -> sLit "f16"; 49 -> sLit "f17";
204 50 -> sLit "f18"; 51 -> sLit "f19";
205 52 -> sLit "f20"; 53 -> sLit "f21";
206 54 -> sLit "f22"; 55 -> sLit "f23";
207 56 -> sLit "f24"; 57 -> sLit "f25";
208 58 -> sLit "f26"; 59 -> sLit "f27";
209 60 -> sLit "f28"; 61 -> sLit "f29";
210 62 -> sLit "f30"; 63 -> sLit "f31";
211 _ -> sLit "very naughty powerpc register"
214 ppr_reg_no :: Int -> Doc
215 ppr_reg_no i | i <= 31 = int i -- GPRs
216 | i <= 63 = int (i-32) -- FPRs
217 | otherwise = ptext (sLit "very naughty powerpc register")
222 pprSize :: Size -> Doc
230 _ -> panic "PPC.Ppr.pprSize: no match")
233 pprCond :: Cond -> Doc
237 EQQ -> sLit "eq"; NE -> sLit "ne";
238 LTT -> sLit "lt"; GE -> sLit "ge";
239 GTT -> sLit "gt"; LE -> sLit "le";
240 LU -> sLit "lt"; GEU -> sLit "ge";
241 GU -> sLit "gt"; LEU -> sLit "le"; })
246 pprImm (ImmInt i) = int i
247 pprImm (ImmInteger i) = integer i
248 pprImm (ImmCLbl l) = pprCLabel_asm l
249 pprImm (ImmIndex l i) = pprCLabel_asm l <> char '+' <> int i
250 pprImm (ImmLit s) = s
252 pprImm (ImmFloat _) = ptext (sLit "naughty float immediate")
253 pprImm (ImmDouble _) = ptext (sLit "naughty double immediate")
255 pprImm (ImmConstantSum a b) = pprImm a <> char '+' <> pprImm b
256 pprImm (ImmConstantDiff a b) = pprImm a <> char '-'
257 <> lparen <> pprImm b <> rparen
261 = hcat [ pp_lo, pprImm i, rparen ]
266 = hcat [ pp_hi, pprImm i, rparen ]
271 = hcat [ pp_ha, pprImm i, rparen ]
277 = pprImm i <> text "@l"
280 = pprImm i <> text "@h"
283 = pprImm i <> text "@ha"
288 pprAddr :: AddrMode -> Doc
289 pprAddr (AddrRegReg r1 r2)
290 = pprReg r1 <+> ptext (sLit ", ") <+> pprReg r2
292 pprAddr (AddrRegImm r1 (ImmInt i)) = hcat [ int i, char '(', pprReg r1, char ')' ]
293 pprAddr (AddrRegImm r1 (ImmInteger i)) = hcat [ integer i, char '(', pprReg r1, char ')' ]
294 pprAddr (AddrRegImm r1 imm) = hcat [ pprImm imm, char '(', pprReg r1, char ')' ]
297 pprSectionHeader :: Section -> Doc
301 Text -> ptext (sLit ".text\n.align 2")
302 Data -> ptext (sLit ".data\n.align 2")
303 ReadOnlyData -> ptext (sLit ".const\n.align 2")
304 RelocatableReadOnlyData -> ptext (sLit ".const_data\n.align 2")
305 UninitialisedData -> ptext (sLit ".const_data\n.align 2")
306 ReadOnlyData16 -> ptext (sLit ".const\n.align 4")
307 OtherSection _ -> panic "PprMach.pprSectionHeader: unknown section"
312 Text -> ptext (sLit ".text\n.align 2")
313 Data -> ptext (sLit ".data\n.align 2")
314 ReadOnlyData -> ptext (sLit ".section .rodata\n\t.align 2")
315 RelocatableReadOnlyData -> ptext (sLit ".data\n\t.align 2")
316 UninitialisedData -> ptext (sLit ".section .bss\n\t.align 2")
317 ReadOnlyData16 -> ptext (sLit ".section .rodata\n\t.align 4")
318 OtherSection _ -> panic "PprMach.pprSectionHeader: unknown section"
323 pprDataItem :: CmmLit -> Doc
325 = vcat (ppr_item (cmmTypeSize $ cmmLitType lit) lit)
329 ppr_item II8 _ = [ptext (sLit "\t.byte\t") <> pprImm imm]
331 ppr_item II32 _ = [ptext (sLit "\t.long\t") <> pprImm imm]
333 ppr_item FF32 (CmmFloat r _)
334 = let bs = floatToBytes (fromRational r)
335 in map (\b -> ptext (sLit "\t.byte\t") <> pprImm (ImmInt b)) bs
337 ppr_item FF64 (CmmFloat r _)
338 = let bs = doubleToBytes (fromRational r)
339 in map (\b -> ptext (sLit "\t.byte\t") <> pprImm (ImmInt b)) bs
341 ppr_item II16 _ = [ptext (sLit "\t.short\t") <> pprImm imm]
343 ppr_item II64 (CmmInt x _) =
344 [ptext (sLit "\t.long\t")
346 (fromIntegral (x `shiftR` 32) :: Word32)),
347 ptext (sLit "\t.long\t")
348 <> int (fromIntegral (fromIntegral x :: Word32))]
351 = panic "PPC.Ppr.pprDataItem: no match"
354 pprInstr :: Instr -> Doc
356 pprInstr (COMMENT _) = empty -- nuke 'em
359 = IF_ARCH_alpha( ((<>) (ptext (sLit "\t# ")) (ftext s))
360 ,IF_ARCH_sparc( ((<>) (ptext (sLit "# ")) (ftext s))
361 ,IF_ARCH_i386( ((<>) (ptext (sLit "# ")) (ftext s))
362 ,IF_ARCH_x86_64( ((<>) (ptext (sLit "# ")) (ftext s))
363 ,IF_ARCH_powerpc( IF_OS_linux(
364 ((<>) (ptext (sLit "# ")) (ftext s)),
365 ((<>) (ptext (sLit "; ")) (ftext s)))
369 = pprInstr (COMMENT (mkFastString ("\tdelta = " ++ show d)))
371 pprInstr (NEWBLOCK _)
372 = panic "PprMach.pprInstr: NEWBLOCK"
375 = panic "PprMach.pprInstr: LDATA"
378 pprInstr (SPILL reg slot)
380 ptext (sLit "\tSPILL"),
384 ptext (sLit "SLOT") <> parens (int slot)]
386 pprInstr (RELOAD slot reg)
388 ptext (sLit "\tRELOAD"),
390 ptext (sLit "SLOT") <> parens (int slot),
395 pprInstr (LD sz reg addr) = hcat [
404 _ -> panic "PPC.Ppr.pprInstr: no match"
406 case addr of AddrRegImm _ _ -> empty
407 AddrRegReg _ _ -> char 'x',
413 pprInstr (LA sz reg addr) = hcat [
422 _ -> panic "PPC.Ppr.pprInstr: no match"
424 case addr of AddrRegImm _ _ -> empty
425 AddrRegReg _ _ -> char 'x',
431 pprInstr (ST sz reg addr) = hcat [
435 case addr of AddrRegImm _ _ -> empty
436 AddrRegReg _ _ -> char 'x',
442 pprInstr (STU sz reg addr) = hcat [
447 case addr of AddrRegImm _ _ -> empty
448 AddrRegReg _ _ -> char 'x',
453 pprInstr (LIS reg imm) = hcat [
461 pprInstr (LI reg imm) = hcat [
469 pprInstr (MR reg1 reg2)
470 | reg1 == reg2 = empty
473 case targetClassOfReg reg1 of
474 RcInteger -> ptext (sLit "mr")
475 _ -> ptext (sLit "fmr"),
481 pprInstr (CMP sz reg ri) = hcat [
497 pprInstr (CMPL sz reg ri) = hcat [
513 pprInstr (BCC cond (BlockId id)) = hcat [
520 where lbl = mkAsmTempLabel id
522 pprInstr (BCCFAR cond (BlockId id)) = vcat [
525 pprCond (condNegate cond),
529 ptext (sLit "\tb\t"),
533 where lbl = mkAsmTempLabel id
535 pprInstr (JMP lbl) = hcat [ -- an alias for b that takes a CLabel
542 pprInstr (MTCTR reg) = hcat [
544 ptext (sLit "mtctr"),
548 pprInstr (BCTR _) = hcat [
552 pprInstr (BL lbl _) = hcat [
553 ptext (sLit "\tbl\t"),
556 pprInstr (BCTRL _) = hcat [
560 pprInstr (ADD reg1 reg2 ri) = pprLogic (sLit "add") reg1 reg2 ri
561 pprInstr (ADDIS reg1 reg2 imm) = hcat [
563 ptext (sLit "addis"),
572 pprInstr (ADDC reg1 reg2 reg3) = pprLogic (sLit "addc") reg1 reg2 (RIReg reg3)
573 pprInstr (ADDE reg1 reg2 reg3) = pprLogic (sLit "adde") reg1 reg2 (RIReg reg3)
574 pprInstr (SUBF reg1 reg2 reg3) = pprLogic (sLit "subf") reg1 reg2 (RIReg reg3)
575 pprInstr (MULLW reg1 reg2 ri@(RIReg _)) = pprLogic (sLit "mullw") reg1 reg2 ri
576 pprInstr (MULLW reg1 reg2 ri@(RIImm _)) = pprLogic (sLit "mull") reg1 reg2 ri
577 pprInstr (DIVW reg1 reg2 reg3) = pprLogic (sLit "divw") reg1 reg2 (RIReg reg3)
578 pprInstr (DIVWU reg1 reg2 reg3) = pprLogic (sLit "divwu") reg1 reg2 (RIReg reg3)
580 pprInstr (MULLW_MayOflo reg1 reg2 reg3) = vcat [
581 hcat [ ptext (sLit "\tmullwo\t"), pprReg reg1, ptext (sLit ", "),
582 pprReg reg2, ptext (sLit ", "),
584 hcat [ ptext (sLit "\tmfxer\t"), pprReg reg1 ],
585 hcat [ ptext (sLit "\trlwinm\t"), pprReg reg1, ptext (sLit ", "),
586 pprReg reg1, ptext (sLit ", "),
587 ptext (sLit "2, 31, 31") ]
590 -- for some reason, "andi" doesn't exist.
591 -- we'll use "andi." instead.
592 pprInstr (AND reg1 reg2 (RIImm imm)) = hcat [
594 ptext (sLit "andi."),
602 pprInstr (AND reg1 reg2 ri) = pprLogic (sLit "and") reg1 reg2 ri
604 pprInstr (OR reg1 reg2 ri) = pprLogic (sLit "or") reg1 reg2 ri
605 pprInstr (XOR reg1 reg2 ri) = pprLogic (sLit "xor") reg1 reg2 ri
607 pprInstr (XORIS reg1 reg2 imm) = hcat [
609 ptext (sLit "xoris"),
618 pprInstr (EXTS sz reg1 reg2) = hcat [
628 pprInstr (NEG reg1 reg2) = pprUnary (sLit "neg") reg1 reg2
629 pprInstr (NOT reg1 reg2) = pprUnary (sLit "not") reg1 reg2
631 pprInstr (SLW reg1 reg2 ri) = pprLogic (sLit "slw") reg1 reg2 (limitShiftRI ri)
632 pprInstr (SRW reg1 reg2 ri) = pprLogic (sLit "srw") reg1 reg2 (limitShiftRI ri)
633 pprInstr (SRAW reg1 reg2 ri) = pprLogic (sLit "sraw") reg1 reg2 (limitShiftRI ri)
634 pprInstr (RLWINM reg1 reg2 sh mb me) = hcat [
635 ptext (sLit "\trlwinm\t"),
647 pprInstr (FADD sz reg1 reg2 reg3) = pprBinaryF (sLit "fadd") sz reg1 reg2 reg3
648 pprInstr (FSUB sz reg1 reg2 reg3) = pprBinaryF (sLit "fsub") sz reg1 reg2 reg3
649 pprInstr (FMUL sz reg1 reg2 reg3) = pprBinaryF (sLit "fmul") sz reg1 reg2 reg3
650 pprInstr (FDIV sz reg1 reg2 reg3) = pprBinaryF (sLit "fdiv") sz reg1 reg2 reg3
651 pprInstr (FNEG reg1 reg2) = pprUnary (sLit "fneg") reg1 reg2
653 pprInstr (FCMP reg1 reg2) = hcat [
655 ptext (sLit "fcmpu\tcr0, "),
656 -- Note: we're using fcmpu, not fcmpo
657 -- The difference is with fcmpo, compare with NaN is an invalid operation.
658 -- We don't handle invalid fp ops, so we don't care
664 pprInstr (FCTIWZ reg1 reg2) = pprUnary (sLit "fctiwz") reg1 reg2
665 pprInstr (FRSP reg1 reg2) = pprUnary (sLit "frsp") reg1 reg2
667 pprInstr (CRNOR dst src1 src2) = hcat [
668 ptext (sLit "\tcrnor\t"),
676 pprInstr (MFCR reg) = hcat [
683 pprInstr (MFLR reg) = hcat [
690 pprInstr (FETCHPC reg) = vcat [
691 ptext (sLit "\tbcl\t20,31,1f"),
692 hcat [ ptext (sLit "1:\tmflr\t"), pprReg reg ]
695 pprInstr LWSYNC = ptext (sLit "\tlwsync")
697 -- pprInstr _ = panic "pprInstr (ppc)"
700 pprLogic :: LitString -> Reg -> Reg -> RI -> Doc
701 pprLogic op reg1 reg2 ri = hcat [
716 pprUnary :: LitString -> Reg -> Reg -> Doc
717 pprUnary op reg1 reg2 = hcat [
727 pprBinaryF :: LitString -> Size -> Reg -> Reg -> Reg -> Doc
728 pprBinaryF op sz reg1 reg2 reg3 = hcat [
741 pprRI (RIReg r) = pprReg r
742 pprRI (RIImm r) = pprImm r
745 pprFSize :: Size -> Doc
746 pprFSize FF64 = empty
747 pprFSize FF32 = char 's'
748 pprFSize _ = panic "PPC.Ppr.pprFSize: no match"
750 -- limit immediate argument for shift instruction to range 0..32
751 -- (yes, the maximum is really 32, not 31)
752 limitShiftRI :: RI -> RI
753 limitShiftRI (RIImm (ImmInt i)) | i > 32 || i < 0 = RIImm (ImmInt 32)