1 -----------------------------------------------------------------------------
3 -- Pretty-printing assembly language
5 -- (c) The University of Glasgow 1993-2005
7 -----------------------------------------------------------------------------
23 #include "nativeGen/NCG.h"
24 #include "HsVersions.h"
40 import Unique ( pprUnique )
43 import qualified Outputable
44 import Outputable ( Outputable, panic )
50 -- -----------------------------------------------------------------------------
51 -- Printing this stuff out
53 pprNatCmmTop :: NatCmmTop Instr -> Doc
54 pprNatCmmTop (CmmData section dats) =
55 pprSectionHeader section $$ vcat (map pprData dats)
57 -- special case for split markers:
58 pprNatCmmTop (CmmProc [] lbl _ (ListGraph [])) = pprLabel lbl
60 pprNatCmmTop (CmmProc info lbl _ (ListGraph blocks)) =
61 pprSectionHeader Text $$
62 (if null info then -- blocks guaranteed not null, so label needed
65 #if HAVE_SUBSECTIONS_VIA_SYMBOLS
66 pprCLabel_asm (mkDeadStripPreventer $ entryLblToInfoLbl lbl)
69 vcat (map pprData info) $$
70 pprLabel (entryLblToInfoLbl lbl)
72 vcat (map pprBasicBlock blocks)
73 -- above: Even the first block gets a label, because with branch-chain
74 -- elimination, it might be the target of a goto.
75 #if HAVE_SUBSECTIONS_VIA_SYMBOLS
76 -- If we are using the .subsections_via_symbols directive
77 -- (available on recent versions of Darwin),
78 -- we have to make sure that there is some kind of reference
79 -- from the entry code to a label on the _top_ of of the info table,
80 -- so that the linker will not think it is unreferenced and dead-strip
81 -- it. That's why the label is called a DeadStripPreventer (_dsp).
84 <+> pprCLabel_asm (entryLblToInfoLbl lbl)
86 <+> pprCLabel_asm (mkDeadStripPreventer $ entryLblToInfoLbl lbl)
91 pprBasicBlock :: NatBasicBlock Instr -> Doc
92 pprBasicBlock (BasicBlock (BlockId id) instrs) =
93 pprLabel (mkAsmTempLabel id) $$
94 vcat (map pprInstr instrs)
97 pprData :: CmmStatic -> Doc
98 pprData (CmmAlign bytes) = pprAlign bytes
99 pprData (CmmDataLabel lbl) = pprLabel lbl
100 pprData (CmmString str) = pprASCII str
103 pprData (CmmUninitialised bytes) = ptext (sLit ".space ") <> int bytes
105 pprData (CmmUninitialised bytes) = ptext (sLit ".skip ") <> int bytes
108 pprData (CmmStaticLit lit) = pprDataItem lit
110 pprGloblDecl :: CLabel -> Doc
112 | not (externallyVisibleCLabel lbl) = empty
113 | otherwise = ptext IF_ARCH_sparc((sLit ".global "),
117 pprTypeAndSizeDecl :: CLabel -> Doc
119 pprTypeAndSizeDecl lbl
120 | not (externallyVisibleCLabel lbl) = empty
121 | otherwise = ptext (sLit ".type ") <>
122 pprCLabel_asm lbl <> ptext (sLit ", @object")
128 pprLabel :: CLabel -> Doc
129 pprLabel lbl = pprGloblDecl lbl $$ pprTypeAndSizeDecl lbl $$ (pprCLabel_asm lbl <> char ':')
132 pprASCII :: [Word8] -> Doc
134 = vcat (map do1 str) $$ do1 0
137 do1 w = ptext (sLit "\t.byte\t") <> int (fromIntegral w)
139 pprAlign :: Int -> Doc
141 ptext (sLit ".align ") <> int pow2
145 log2 :: Int -> Int -- cache the common ones
150 log2 n = 1 + log2 (n `quot` 2)
153 -- -----------------------------------------------------------------------------
154 -- pprInstr: print an 'Instr'
156 instance Outputable Instr where
157 ppr instr = Outputable.docToSDoc $ pprInstr instr
160 pprUserReg :: Reg -> Doc
167 RealReg i -> ppr_reg_no i
168 VirtualRegI u -> text "%vI_" <> asmSDoc (pprUnique u)
169 VirtualRegHi u -> text "%vHi_" <> asmSDoc (pprUnique u)
170 VirtualRegF u -> text "%vF_" <> asmSDoc (pprUnique u)
171 VirtualRegD u -> text "%vD_" <> asmSDoc (pprUnique u)
174 ppr_reg_no :: Int -> Doc
177 0 -> sLit "r0"; 1 -> sLit "r1";
178 2 -> sLit "r2"; 3 -> sLit "r3";
179 4 -> sLit "r4"; 5 -> sLit "r5";
180 6 -> sLit "r6"; 7 -> sLit "r7";
181 8 -> sLit "r8"; 9 -> sLit "r9";
182 10 -> sLit "r10"; 11 -> sLit "r11";
183 12 -> sLit "r12"; 13 -> sLit "r13";
184 14 -> sLit "r14"; 15 -> sLit "r15";
185 16 -> sLit "r16"; 17 -> sLit "r17";
186 18 -> sLit "r18"; 19 -> sLit "r19";
187 20 -> sLit "r20"; 21 -> sLit "r21";
188 22 -> sLit "r22"; 23 -> sLit "r23";
189 24 -> sLit "r24"; 25 -> sLit "r25";
190 26 -> sLit "r26"; 27 -> sLit "r27";
191 28 -> sLit "r28"; 29 -> sLit "r29";
192 30 -> sLit "r30"; 31 -> sLit "r31";
193 32 -> sLit "f0"; 33 -> sLit "f1";
194 34 -> sLit "f2"; 35 -> sLit "f3";
195 36 -> sLit "f4"; 37 -> sLit "f5";
196 38 -> sLit "f6"; 39 -> sLit "f7";
197 40 -> sLit "f8"; 41 -> sLit "f9";
198 42 -> sLit "f10"; 43 -> sLit "f11";
199 44 -> sLit "f12"; 45 -> sLit "f13";
200 46 -> sLit "f14"; 47 -> sLit "f15";
201 48 -> sLit "f16"; 49 -> sLit "f17";
202 50 -> sLit "f18"; 51 -> sLit "f19";
203 52 -> sLit "f20"; 53 -> sLit "f21";
204 54 -> sLit "f22"; 55 -> sLit "f23";
205 56 -> sLit "f24"; 57 -> sLit "f25";
206 58 -> sLit "f26"; 59 -> sLit "f27";
207 60 -> sLit "f28"; 61 -> sLit "f29";
208 62 -> sLit "f30"; 63 -> sLit "f31";
209 _ -> sLit "very naughty powerpc register"
212 ppr_reg_no :: Int -> Doc
213 ppr_reg_no i | i <= 31 = int i -- GPRs
214 | i <= 63 = int (i-32) -- FPRs
215 | otherwise = ptext (sLit "very naughty powerpc register")
220 pprSize :: Size -> Doc
228 _ -> panic "PPC.Ppr.pprSize: no match")
231 pprCond :: Cond -> Doc
235 EQQ -> sLit "eq"; NE -> sLit "ne";
236 LTT -> sLit "lt"; GE -> sLit "ge";
237 GTT -> sLit "gt"; LE -> sLit "le";
238 LU -> sLit "lt"; GEU -> sLit "ge";
239 GU -> sLit "gt"; LEU -> sLit "le"; })
244 pprImm (ImmInt i) = int i
245 pprImm (ImmInteger i) = integer i
246 pprImm (ImmCLbl l) = pprCLabel_asm l
247 pprImm (ImmIndex l i) = pprCLabel_asm l <> char '+' <> int i
248 pprImm (ImmLit s) = s
250 pprImm (ImmFloat _) = ptext (sLit "naughty float immediate")
251 pprImm (ImmDouble _) = ptext (sLit "naughty double immediate")
253 pprImm (ImmConstantSum a b) = pprImm a <> char '+' <> pprImm b
254 pprImm (ImmConstantDiff a b) = pprImm a <> char '-'
255 <> lparen <> pprImm b <> rparen
259 = hcat [ pp_lo, pprImm i, rparen ]
264 = hcat [ pp_hi, pprImm i, rparen ]
269 = hcat [ pp_ha, pprImm i, rparen ]
275 = pprImm i <> text "@l"
278 = pprImm i <> text "@h"
281 = pprImm i <> text "@ha"
286 pprAddr :: AddrMode -> Doc
287 pprAddr (AddrRegReg r1 r2)
288 = pprReg r1 <+> ptext (sLit ", ") <+> pprReg r2
290 pprAddr (AddrRegImm r1 (ImmInt i)) = hcat [ int i, char '(', pprReg r1, char ')' ]
291 pprAddr (AddrRegImm r1 (ImmInteger i)) = hcat [ integer i, char '(', pprReg r1, char ')' ]
292 pprAddr (AddrRegImm r1 imm) = hcat [ pprImm imm, char '(', pprReg r1, char ')' ]
295 pprSectionHeader :: Section -> Doc
299 Text -> ptext (sLit ".text\n.align 2")
300 Data -> ptext (sLit ".data\n.align 2")
301 ReadOnlyData -> ptext (sLit ".const\n.align 2")
302 RelocatableReadOnlyData -> ptext (sLit ".const_data\n.align 2")
303 UninitialisedData -> ptext (sLit ".const_data\n.align 2")
304 ReadOnlyData16 -> ptext (sLit ".const\n.align 4")
305 OtherSection _ -> panic "PprMach.pprSectionHeader: unknown section"
310 Text -> ptext (sLit ".text\n.align 2")
311 Data -> ptext (sLit ".data\n.align 2")
312 ReadOnlyData -> ptext (sLit ".section .rodata\n\t.align 2")
313 RelocatableReadOnlyData -> ptext (sLit ".data\n\t.align 2")
314 UninitialisedData -> ptext (sLit ".section .bss\n\t.align 2")
315 ReadOnlyData16 -> ptext (sLit ".section .rodata\n\t.align 4")
316 OtherSection _ -> panic "PprMach.pprSectionHeader: unknown section"
321 pprDataItem :: CmmLit -> Doc
323 = vcat (ppr_item (cmmTypeSize $ cmmLitType lit) lit)
327 ppr_item II8 _ = [ptext (sLit "\t.byte\t") <> pprImm imm]
329 ppr_item II32 _ = [ptext (sLit "\t.long\t") <> pprImm imm]
331 ppr_item FF32 (CmmFloat r _)
332 = let bs = floatToBytes (fromRational r)
333 in map (\b -> ptext (sLit "\t.byte\t") <> pprImm (ImmInt b)) bs
335 ppr_item FF64 (CmmFloat r _)
336 = let bs = doubleToBytes (fromRational r)
337 in map (\b -> ptext (sLit "\t.byte\t") <> pprImm (ImmInt b)) bs
339 ppr_item II16 _ = [ptext (sLit "\t.short\t") <> pprImm imm]
341 ppr_item II64 (CmmInt x _) =
342 [ptext (sLit "\t.long\t")
344 (fromIntegral (x `shiftR` 32) :: Word32)),
345 ptext (sLit "\t.long\t")
346 <> int (fromIntegral (fromIntegral x :: Word32))]
349 = panic "PPC.Ppr.pprDataItem: no match"
352 pprInstr :: Instr -> Doc
354 pprInstr (COMMENT _) = empty -- nuke 'em
357 = IF_ARCH_alpha( ((<>) (ptext (sLit "\t# ")) (ftext s))
358 ,IF_ARCH_sparc( ((<>) (ptext (sLit "# ")) (ftext s))
359 ,IF_ARCH_i386( ((<>) (ptext (sLit "# ")) (ftext s))
360 ,IF_ARCH_x86_64( ((<>) (ptext (sLit "# ")) (ftext s))
361 ,IF_ARCH_powerpc( IF_OS_linux(
362 ((<>) (ptext (sLit "# ")) (ftext s)),
363 ((<>) (ptext (sLit "; ")) (ftext s)))
367 = pprInstr (COMMENT (mkFastString ("\tdelta = " ++ show d)))
369 pprInstr (NEWBLOCK _)
370 = panic "PprMach.pprInstr: NEWBLOCK"
373 = panic "PprMach.pprInstr: LDATA"
376 pprInstr (SPILL reg slot)
378 ptext (sLit "\tSPILL"),
382 ptext (sLit "SLOT") <> parens (int slot)]
384 pprInstr (RELOAD slot reg)
386 ptext (sLit "\tRELOAD"),
388 ptext (sLit "SLOT") <> parens (int slot),
393 pprInstr (LD sz reg addr) = hcat [
402 _ -> panic "PPC.Ppr.pprInstr: no match"
404 case addr of AddrRegImm _ _ -> empty
405 AddrRegReg _ _ -> char 'x',
411 pprInstr (LA sz reg addr) = hcat [
420 _ -> panic "PPC.Ppr.pprInstr: no match"
422 case addr of AddrRegImm _ _ -> empty
423 AddrRegReg _ _ -> char 'x',
429 pprInstr (ST sz reg addr) = hcat [
433 case addr of AddrRegImm _ _ -> empty
434 AddrRegReg _ _ -> char 'x',
440 pprInstr (STU sz reg addr) = hcat [
445 case addr of AddrRegImm _ _ -> empty
446 AddrRegReg _ _ -> char 'x',
451 pprInstr (LIS reg imm) = hcat [
459 pprInstr (LI reg imm) = hcat [
467 pprInstr (MR reg1 reg2)
468 | reg1 == reg2 = empty
471 case regClass reg1 of
472 RcInteger -> ptext (sLit "mr")
473 _ -> ptext (sLit "fmr"),
479 pprInstr (CMP sz reg ri) = hcat [
495 pprInstr (CMPL sz reg ri) = hcat [
511 pprInstr (BCC cond (BlockId id)) = hcat [
518 where lbl = mkAsmTempLabel id
520 pprInstr (BCCFAR cond (BlockId id)) = vcat [
523 pprCond (condNegate cond),
527 ptext (sLit "\tb\t"),
531 where lbl = mkAsmTempLabel id
533 pprInstr (JMP lbl) = hcat [ -- an alias for b that takes a CLabel
540 pprInstr (MTCTR reg) = hcat [
542 ptext (sLit "mtctr"),
546 pprInstr (BCTR _) = hcat [
550 pprInstr (BL lbl _) = hcat [
551 ptext (sLit "\tbl\t"),
554 pprInstr (BCTRL _) = hcat [
558 pprInstr (ADD reg1 reg2 ri) = pprLogic (sLit "add") reg1 reg2 ri
559 pprInstr (ADDIS reg1 reg2 imm) = hcat [
561 ptext (sLit "addis"),
570 pprInstr (ADDC reg1 reg2 reg3) = pprLogic (sLit "addc") reg1 reg2 (RIReg reg3)
571 pprInstr (ADDE reg1 reg2 reg3) = pprLogic (sLit "adde") reg1 reg2 (RIReg reg3)
572 pprInstr (SUBF reg1 reg2 reg3) = pprLogic (sLit "subf") reg1 reg2 (RIReg reg3)
573 pprInstr (MULLW reg1 reg2 ri@(RIReg _)) = pprLogic (sLit "mullw") reg1 reg2 ri
574 pprInstr (MULLW reg1 reg2 ri@(RIImm _)) = pprLogic (sLit "mull") reg1 reg2 ri
575 pprInstr (DIVW reg1 reg2 reg3) = pprLogic (sLit "divw") reg1 reg2 (RIReg reg3)
576 pprInstr (DIVWU reg1 reg2 reg3) = pprLogic (sLit "divwu") reg1 reg2 (RIReg reg3)
578 pprInstr (MULLW_MayOflo reg1 reg2 reg3) = vcat [
579 hcat [ ptext (sLit "\tmullwo\t"), pprReg reg1, ptext (sLit ", "),
580 pprReg reg2, ptext (sLit ", "),
582 hcat [ ptext (sLit "\tmfxer\t"), pprReg reg1 ],
583 hcat [ ptext (sLit "\trlwinm\t"), pprReg reg1, ptext (sLit ", "),
584 pprReg reg1, ptext (sLit ", "),
585 ptext (sLit "2, 31, 31") ]
588 -- for some reason, "andi" doesn't exist.
589 -- we'll use "andi." instead.
590 pprInstr (AND reg1 reg2 (RIImm imm)) = hcat [
592 ptext (sLit "andi."),
600 pprInstr (AND reg1 reg2 ri) = pprLogic (sLit "and") reg1 reg2 ri
602 pprInstr (OR reg1 reg2 ri) = pprLogic (sLit "or") reg1 reg2 ri
603 pprInstr (XOR reg1 reg2 ri) = pprLogic (sLit "xor") reg1 reg2 ri
605 pprInstr (XORIS reg1 reg2 imm) = hcat [
607 ptext (sLit "xoris"),
616 pprInstr (EXTS sz reg1 reg2) = hcat [
626 pprInstr (NEG reg1 reg2) = pprUnary (sLit "neg") reg1 reg2
627 pprInstr (NOT reg1 reg2) = pprUnary (sLit "not") reg1 reg2
629 pprInstr (SLW reg1 reg2 ri) = pprLogic (sLit "slw") reg1 reg2 (limitShiftRI ri)
630 pprInstr (SRW reg1 reg2 ri) = pprLogic (sLit "srw") reg1 reg2 (limitShiftRI ri)
631 pprInstr (SRAW reg1 reg2 ri) = pprLogic (sLit "sraw") reg1 reg2 (limitShiftRI ri)
632 pprInstr (RLWINM reg1 reg2 sh mb me) = hcat [
633 ptext (sLit "\trlwinm\t"),
645 pprInstr (FADD sz reg1 reg2 reg3) = pprBinaryF (sLit "fadd") sz reg1 reg2 reg3
646 pprInstr (FSUB sz reg1 reg2 reg3) = pprBinaryF (sLit "fsub") sz reg1 reg2 reg3
647 pprInstr (FMUL sz reg1 reg2 reg3) = pprBinaryF (sLit "fmul") sz reg1 reg2 reg3
648 pprInstr (FDIV sz reg1 reg2 reg3) = pprBinaryF (sLit "fdiv") sz reg1 reg2 reg3
649 pprInstr (FNEG reg1 reg2) = pprUnary (sLit "fneg") reg1 reg2
651 pprInstr (FCMP reg1 reg2) = hcat [
653 ptext (sLit "fcmpu\tcr0, "),
654 -- Note: we're using fcmpu, not fcmpo
655 -- The difference is with fcmpo, compare with NaN is an invalid operation.
656 -- We don't handle invalid fp ops, so we don't care
662 pprInstr (FCTIWZ reg1 reg2) = pprUnary (sLit "fctiwz") reg1 reg2
663 pprInstr (FRSP reg1 reg2) = pprUnary (sLit "frsp") reg1 reg2
665 pprInstr (CRNOR dst src1 src2) = hcat [
666 ptext (sLit "\tcrnor\t"),
674 pprInstr (MFCR reg) = hcat [
681 pprInstr (MFLR reg) = hcat [
688 pprInstr (FETCHPC reg) = vcat [
689 ptext (sLit "\tbcl\t20,31,1f"),
690 hcat [ ptext (sLit "1:\tmflr\t"), pprReg reg ]
693 pprInstr LWSYNC = ptext (sLit "\tlwsync")
695 -- pprInstr _ = panic "pprInstr (ppc)"
698 pprLogic :: LitString -> Reg -> Reg -> RI -> Doc
699 pprLogic op reg1 reg2 ri = hcat [
714 pprUnary :: LitString -> Reg -> Reg -> Doc
715 pprUnary op reg1 reg2 = hcat [
725 pprBinaryF :: LitString -> Size -> Reg -> Reg -> Reg -> Doc
726 pprBinaryF op sz reg1 reg2 reg3 = hcat [
739 pprRI (RIReg r) = pprReg r
740 pprRI (RIImm r) = pprImm r
743 pprFSize :: Size -> Doc
744 pprFSize FF64 = empty
745 pprFSize FF32 = char 's'
746 pprFSize _ = panic "PPC.Ppr.pprFSize: no match"
748 -- limit immediate argument for shift instruction to range 0..32
749 -- (yes, the maximum is really 32, not 31)
750 limitShiftRI :: RI -> RI
751 limitShiftRI (RIImm (ImmInt i)) | i > 32 || i < 0 = RIImm (ImmInt 32)