1 -----------------------------------------------------------------------------
3 -- Pretty-printing assembly language
5 -- (c) The University of Glasgow 1993-2005
7 -----------------------------------------------------------------------------
22 #include "nativeGen/NCG.h"
23 #include "HsVersions.h"
39 import Unique ( pprUnique, Uniquable(..) )
42 import qualified Outputable
43 import Outputable ( Outputable, panic )
49 -- -----------------------------------------------------------------------------
50 -- Printing this stuff out
52 pprNatCmmTop :: NatCmmTop Instr -> Doc
53 pprNatCmmTop (CmmData section dats) =
54 pprSectionHeader section $$ vcat (map pprData dats)
56 -- special case for split markers:
57 pprNatCmmTop (CmmProc [] lbl (ListGraph [])) = pprLabel lbl
59 pprNatCmmTop (CmmProc info lbl (ListGraph blocks)) =
60 pprSectionHeader Text $$
61 (if null info then -- blocks guaranteed not null, so label needed
64 #if HAVE_SUBSECTIONS_VIA_SYMBOLS
65 pprCLabel_asm (mkDeadStripPreventer $ entryLblToInfoLbl lbl)
68 vcat (map pprData info) $$
69 pprLabel (entryLblToInfoLbl lbl)
71 vcat (map pprBasicBlock blocks)
72 -- above: Even the first block gets a label, because with branch-chain
73 -- elimination, it might be the target of a goto.
74 #if HAVE_SUBSECTIONS_VIA_SYMBOLS
75 -- If we are using the .subsections_via_symbols directive
76 -- (available on recent versions of Darwin),
77 -- we have to make sure that there is some kind of reference
78 -- from the entry code to a label on the _top_ of of the info table,
79 -- so that the linker will not think it is unreferenced and dead-strip
80 -- it. That's why the label is called a DeadStripPreventer (_dsp).
83 <+> pprCLabel_asm (entryLblToInfoLbl lbl)
85 <+> pprCLabel_asm (mkDeadStripPreventer $ entryLblToInfoLbl lbl)
90 pprBasicBlock :: NatBasicBlock Instr -> Doc
91 pprBasicBlock (BasicBlock blockid instrs) =
92 pprLabel (mkAsmTempLabel (getUnique blockid)) $$
93 vcat (map pprInstr instrs)
96 pprData :: CmmStatic -> Doc
97 pprData (CmmAlign bytes) = pprAlign bytes
98 pprData (CmmDataLabel lbl) = pprLabel lbl
99 pprData (CmmString str) = pprASCII str
102 pprData (CmmUninitialised bytes) = ptext (sLit ".space ") <> int bytes
104 pprData (CmmUninitialised bytes) = ptext (sLit ".skip ") <> int bytes
107 pprData (CmmStaticLit lit) = pprDataItem lit
109 pprGloblDecl :: CLabel -> Doc
111 | not (externallyVisibleCLabel lbl) = empty
112 | otherwise = ptext (sLit ".globl ") <> pprCLabel_asm lbl
114 pprTypeAndSizeDecl :: CLabel -> Doc
116 pprTypeAndSizeDecl lbl
117 | not (externallyVisibleCLabel lbl) = empty
118 | otherwise = ptext (sLit ".type ") <>
119 pprCLabel_asm lbl <> ptext (sLit ", @object")
125 pprLabel :: CLabel -> Doc
126 pprLabel lbl = pprGloblDecl lbl $$ pprTypeAndSizeDecl lbl $$ (pprCLabel_asm lbl <> char ':')
129 pprASCII :: [Word8] -> Doc
131 = vcat (map do1 str) $$ do1 0
134 do1 w = ptext (sLit "\t.byte\t") <> int (fromIntegral w)
136 pprAlign :: Int -> Doc
138 ptext (sLit ".align ") <> int pow2
142 log2 :: Int -> Int -- cache the common ones
147 log2 n = 1 + log2 (n `quot` 2)
150 -- -----------------------------------------------------------------------------
151 -- pprInstr: print an 'Instr'
153 instance Outputable Instr where
154 ppr instr = Outputable.docToSDoc $ pprInstr instr
161 RegReal (RealRegSingle i) -> ppr_reg_no i
162 RegReal (RealRegPair{}) -> panic "PPC.pprReg: no reg pairs on this arch"
163 RegVirtual (VirtualRegI u) -> text "%vI_" <> asmSDoc (pprUnique u)
164 RegVirtual (VirtualRegHi u) -> text "%vHi_" <> asmSDoc (pprUnique u)
165 RegVirtual (VirtualRegF u) -> text "%vF_" <> asmSDoc (pprUnique u)
166 RegVirtual (VirtualRegD u) -> text "%vD_" <> asmSDoc (pprUnique u)
167 RegVirtual (VirtualRegSSE u) -> text "%vSSE_" <> asmSDoc (pprUnique u)
170 ppr_reg_no :: Int -> Doc
173 0 -> sLit "r0"; 1 -> sLit "r1";
174 2 -> sLit "r2"; 3 -> sLit "r3";
175 4 -> sLit "r4"; 5 -> sLit "r5";
176 6 -> sLit "r6"; 7 -> sLit "r7";
177 8 -> sLit "r8"; 9 -> sLit "r9";
178 10 -> sLit "r10"; 11 -> sLit "r11";
179 12 -> sLit "r12"; 13 -> sLit "r13";
180 14 -> sLit "r14"; 15 -> sLit "r15";
181 16 -> sLit "r16"; 17 -> sLit "r17";
182 18 -> sLit "r18"; 19 -> sLit "r19";
183 20 -> sLit "r20"; 21 -> sLit "r21";
184 22 -> sLit "r22"; 23 -> sLit "r23";
185 24 -> sLit "r24"; 25 -> sLit "r25";
186 26 -> sLit "r26"; 27 -> sLit "r27";
187 28 -> sLit "r28"; 29 -> sLit "r29";
188 30 -> sLit "r30"; 31 -> sLit "r31";
189 32 -> sLit "f0"; 33 -> sLit "f1";
190 34 -> sLit "f2"; 35 -> sLit "f3";
191 36 -> sLit "f4"; 37 -> sLit "f5";
192 38 -> sLit "f6"; 39 -> sLit "f7";
193 40 -> sLit "f8"; 41 -> sLit "f9";
194 42 -> sLit "f10"; 43 -> sLit "f11";
195 44 -> sLit "f12"; 45 -> sLit "f13";
196 46 -> sLit "f14"; 47 -> sLit "f15";
197 48 -> sLit "f16"; 49 -> sLit "f17";
198 50 -> sLit "f18"; 51 -> sLit "f19";
199 52 -> sLit "f20"; 53 -> sLit "f21";
200 54 -> sLit "f22"; 55 -> sLit "f23";
201 56 -> sLit "f24"; 57 -> sLit "f25";
202 58 -> sLit "f26"; 59 -> sLit "f27";
203 60 -> sLit "f28"; 61 -> sLit "f29";
204 62 -> sLit "f30"; 63 -> sLit "f31";
205 _ -> sLit "very naughty powerpc register"
208 ppr_reg_no :: Int -> Doc
209 ppr_reg_no i | i <= 31 = int i -- GPRs
210 | i <= 63 = int (i-32) -- FPRs
211 | otherwise = ptext (sLit "very naughty powerpc register")
216 pprSize :: Size -> Doc
224 _ -> panic "PPC.Ppr.pprSize: no match")
227 pprCond :: Cond -> Doc
231 EQQ -> sLit "eq"; NE -> sLit "ne";
232 LTT -> sLit "lt"; GE -> sLit "ge";
233 GTT -> sLit "gt"; LE -> sLit "le";
234 LU -> sLit "lt"; GEU -> sLit "ge";
235 GU -> sLit "gt"; LEU -> sLit "le"; })
240 pprImm (ImmInt i) = int i
241 pprImm (ImmInteger i) = integer i
242 pprImm (ImmCLbl l) = pprCLabel_asm l
243 pprImm (ImmIndex l i) = pprCLabel_asm l <> char '+' <> int i
244 pprImm (ImmLit s) = s
246 pprImm (ImmFloat _) = ptext (sLit "naughty float immediate")
247 pprImm (ImmDouble _) = ptext (sLit "naughty double immediate")
249 pprImm (ImmConstantSum a b) = pprImm a <> char '+' <> pprImm b
250 pprImm (ImmConstantDiff a b) = pprImm a <> char '-'
251 <> lparen <> pprImm b <> rparen
255 = hcat [ pp_lo, pprImm i, rparen ]
260 = hcat [ pp_hi, pprImm i, rparen ]
265 = hcat [ pp_ha, pprImm i, rparen ]
271 = pprImm i <> text "@l"
274 = pprImm i <> text "@h"
277 = pprImm i <> text "@ha"
282 pprAddr :: AddrMode -> Doc
283 pprAddr (AddrRegReg r1 r2)
284 = pprReg r1 <+> ptext (sLit ", ") <+> pprReg r2
286 pprAddr (AddrRegImm r1 (ImmInt i)) = hcat [ int i, char '(', pprReg r1, char ')' ]
287 pprAddr (AddrRegImm r1 (ImmInteger i)) = hcat [ integer i, char '(', pprReg r1, char ')' ]
288 pprAddr (AddrRegImm r1 imm) = hcat [ pprImm imm, char '(', pprReg r1, char ')' ]
291 pprSectionHeader :: Section -> Doc
295 Text -> ptext (sLit ".text\n.align 2")
296 Data -> ptext (sLit ".data\n.align 2")
297 ReadOnlyData -> ptext (sLit ".const\n.align 2")
298 RelocatableReadOnlyData -> ptext (sLit ".const_data\n.align 2")
299 UninitialisedData -> ptext (sLit ".const_data\n.align 2")
300 ReadOnlyData16 -> ptext (sLit ".const\n.align 4")
301 OtherSection _ -> panic "PprMach.pprSectionHeader: unknown section"
306 Text -> ptext (sLit ".text\n.align 2")
307 Data -> ptext (sLit ".data\n.align 2")
308 ReadOnlyData -> ptext (sLit ".section .rodata\n\t.align 2")
309 RelocatableReadOnlyData -> ptext (sLit ".data\n\t.align 2")
310 UninitialisedData -> ptext (sLit ".section .bss\n\t.align 2")
311 ReadOnlyData16 -> ptext (sLit ".section .rodata\n\t.align 4")
312 OtherSection _ -> panic "PprMach.pprSectionHeader: unknown section"
317 pprDataItem :: CmmLit -> Doc
319 = vcat (ppr_item (cmmTypeSize $ cmmLitType lit) lit)
323 ppr_item II8 _ = [ptext (sLit "\t.byte\t") <> pprImm imm]
325 ppr_item II32 _ = [ptext (sLit "\t.long\t") <> pprImm imm]
327 ppr_item FF32 (CmmFloat r _)
328 = let bs = floatToBytes (fromRational r)
329 in map (\b -> ptext (sLit "\t.byte\t") <> pprImm (ImmInt b)) bs
331 ppr_item FF64 (CmmFloat r _)
332 = let bs = doubleToBytes (fromRational r)
333 in map (\b -> ptext (sLit "\t.byte\t") <> pprImm (ImmInt b)) bs
335 ppr_item II16 _ = [ptext (sLit "\t.short\t") <> pprImm imm]
337 ppr_item II64 (CmmInt x _) =
338 [ptext (sLit "\t.long\t")
340 (fromIntegral (x `shiftR` 32) :: Word32)),
341 ptext (sLit "\t.long\t")
342 <> int (fromIntegral (fromIntegral x :: Word32))]
345 = panic "PPC.Ppr.pprDataItem: no match"
348 pprInstr :: Instr -> Doc
350 pprInstr (COMMENT _) = empty -- nuke 'em
354 ((<>) (ptext (sLit "# ")) (ftext s)),
355 ((<>) (ptext (sLit "; ")) (ftext s)))
358 = pprInstr (COMMENT (mkFastString ("\tdelta = " ++ show d)))
360 pprInstr (NEWBLOCK _)
361 = panic "PprMach.pprInstr: NEWBLOCK"
364 = panic "PprMach.pprInstr: LDATA"
367 pprInstr (SPILL reg slot)
369 ptext (sLit "\tSPILL"),
373 ptext (sLit "SLOT") <> parens (int slot)]
375 pprInstr (RELOAD slot reg)
377 ptext (sLit "\tRELOAD"),
379 ptext (sLit "SLOT") <> parens (int slot),
384 pprInstr (LD sz reg addr) = hcat [
393 _ -> panic "PPC.Ppr.pprInstr: no match"
395 case addr of AddrRegImm _ _ -> empty
396 AddrRegReg _ _ -> char 'x',
402 pprInstr (LA sz reg addr) = hcat [
411 _ -> panic "PPC.Ppr.pprInstr: no match"
413 case addr of AddrRegImm _ _ -> empty
414 AddrRegReg _ _ -> char 'x',
420 pprInstr (ST sz reg addr) = hcat [
424 case addr of AddrRegImm _ _ -> empty
425 AddrRegReg _ _ -> char 'x',
431 pprInstr (STU sz reg addr) = hcat [
436 case addr of AddrRegImm _ _ -> empty
437 AddrRegReg _ _ -> char 'x',
442 pprInstr (LIS reg imm) = hcat [
450 pprInstr (LI reg imm) = hcat [
458 pprInstr (MR reg1 reg2)
459 | reg1 == reg2 = empty
462 case targetClassOfReg reg1 of
463 RcInteger -> ptext (sLit "mr")
464 _ -> ptext (sLit "fmr"),
470 pprInstr (CMP sz reg ri) = hcat [
486 pprInstr (CMPL sz reg ri) = hcat [
502 pprInstr (BCC cond blockid) = hcat [
509 where lbl = mkAsmTempLabel (getUnique blockid)
511 pprInstr (BCCFAR cond blockid) = vcat [
514 pprCond (condNegate cond),
518 ptext (sLit "\tb\t"),
522 where lbl = mkAsmTempLabel (getUnique blockid)
524 pprInstr (JMP lbl) = hcat [ -- an alias for b that takes a CLabel
531 pprInstr (MTCTR reg) = hcat [
533 ptext (sLit "mtctr"),
537 pprInstr (BCTR _ _) = hcat [
541 pprInstr (BL lbl _) = hcat [
542 ptext (sLit "\tbl\t"),
545 pprInstr (BCTRL _) = hcat [
549 pprInstr (ADD reg1 reg2 ri) = pprLogic (sLit "add") reg1 reg2 ri
550 pprInstr (ADDIS reg1 reg2 imm) = hcat [
552 ptext (sLit "addis"),
561 pprInstr (ADDC reg1 reg2 reg3) = pprLogic (sLit "addc") reg1 reg2 (RIReg reg3)
562 pprInstr (ADDE reg1 reg2 reg3) = pprLogic (sLit "adde") reg1 reg2 (RIReg reg3)
563 pprInstr (SUBF reg1 reg2 reg3) = pprLogic (sLit "subf") reg1 reg2 (RIReg reg3)
564 pprInstr (MULLW reg1 reg2 ri@(RIReg _)) = pprLogic (sLit "mullw") reg1 reg2 ri
565 pprInstr (MULLW reg1 reg2 ri@(RIImm _)) = pprLogic (sLit "mull") reg1 reg2 ri
566 pprInstr (DIVW reg1 reg2 reg3) = pprLogic (sLit "divw") reg1 reg2 (RIReg reg3)
567 pprInstr (DIVWU reg1 reg2 reg3) = pprLogic (sLit "divwu") reg1 reg2 (RIReg reg3)
569 pprInstr (MULLW_MayOflo reg1 reg2 reg3) = vcat [
570 hcat [ ptext (sLit "\tmullwo\t"), pprReg reg1, ptext (sLit ", "),
571 pprReg reg2, ptext (sLit ", "),
573 hcat [ ptext (sLit "\tmfxer\t"), pprReg reg1 ],
574 hcat [ ptext (sLit "\trlwinm\t"), pprReg reg1, ptext (sLit ", "),
575 pprReg reg1, ptext (sLit ", "),
576 ptext (sLit "2, 31, 31") ]
579 -- for some reason, "andi" doesn't exist.
580 -- we'll use "andi." instead.
581 pprInstr (AND reg1 reg2 (RIImm imm)) = hcat [
583 ptext (sLit "andi."),
591 pprInstr (AND reg1 reg2 ri) = pprLogic (sLit "and") reg1 reg2 ri
593 pprInstr (OR reg1 reg2 ri) = pprLogic (sLit "or") reg1 reg2 ri
594 pprInstr (XOR reg1 reg2 ri) = pprLogic (sLit "xor") reg1 reg2 ri
596 pprInstr (XORIS reg1 reg2 imm) = hcat [
598 ptext (sLit "xoris"),
607 pprInstr (EXTS sz reg1 reg2) = hcat [
617 pprInstr (NEG reg1 reg2) = pprUnary (sLit "neg") reg1 reg2
618 pprInstr (NOT reg1 reg2) = pprUnary (sLit "not") reg1 reg2
620 pprInstr (SLW reg1 reg2 ri) = pprLogic (sLit "slw") reg1 reg2 (limitShiftRI ri)
621 pprInstr (SRW reg1 reg2 ri) = pprLogic (sLit "srw") reg1 reg2 (limitShiftRI ri)
622 pprInstr (SRAW reg1 reg2 ri) = pprLogic (sLit "sraw") reg1 reg2 (limitShiftRI ri)
623 pprInstr (RLWINM reg1 reg2 sh mb me) = hcat [
624 ptext (sLit "\trlwinm\t"),
636 pprInstr (FADD sz reg1 reg2 reg3) = pprBinaryF (sLit "fadd") sz reg1 reg2 reg3
637 pprInstr (FSUB sz reg1 reg2 reg3) = pprBinaryF (sLit "fsub") sz reg1 reg2 reg3
638 pprInstr (FMUL sz reg1 reg2 reg3) = pprBinaryF (sLit "fmul") sz reg1 reg2 reg3
639 pprInstr (FDIV sz reg1 reg2 reg3) = pprBinaryF (sLit "fdiv") sz reg1 reg2 reg3
640 pprInstr (FNEG reg1 reg2) = pprUnary (sLit "fneg") reg1 reg2
642 pprInstr (FCMP reg1 reg2) = hcat [
644 ptext (sLit "fcmpu\tcr0, "),
645 -- Note: we're using fcmpu, not fcmpo
646 -- The difference is with fcmpo, compare with NaN is an invalid operation.
647 -- We don't handle invalid fp ops, so we don't care
653 pprInstr (FCTIWZ reg1 reg2) = pprUnary (sLit "fctiwz") reg1 reg2
654 pprInstr (FRSP reg1 reg2) = pprUnary (sLit "frsp") reg1 reg2
656 pprInstr (CRNOR dst src1 src2) = hcat [
657 ptext (sLit "\tcrnor\t"),
665 pprInstr (MFCR reg) = hcat [
672 pprInstr (MFLR reg) = hcat [
679 pprInstr (FETCHPC reg) = vcat [
680 ptext (sLit "\tbcl\t20,31,1f"),
681 hcat [ ptext (sLit "1:\tmflr\t"), pprReg reg ]
684 pprInstr LWSYNC = ptext (sLit "\tlwsync")
686 -- pprInstr _ = panic "pprInstr (ppc)"
689 pprLogic :: LitString -> Reg -> Reg -> RI -> Doc
690 pprLogic op reg1 reg2 ri = hcat [
705 pprUnary :: LitString -> Reg -> Reg -> Doc
706 pprUnary op reg1 reg2 = hcat [
716 pprBinaryF :: LitString -> Size -> Reg -> Reg -> Reg -> Doc
717 pprBinaryF op sz reg1 reg2 reg3 = hcat [
730 pprRI (RIReg r) = pprReg r
731 pprRI (RIImm r) = pprImm r
734 pprFSize :: Size -> Doc
735 pprFSize FF64 = empty
736 pprFSize FF32 = char 's'
737 pprFSize _ = panic "PPC.Ppr.pprFSize: no match"
739 -- limit immediate argument for shift instruction to range 0..32
740 -- (yes, the maximum is really 32, not 31)
741 limitShiftRI :: RI -> RI
742 limitShiftRI (RIImm (ImmInt i)) | i > 32 || i < 0 = RIImm (ImmInt 32)