1 //===-- ARMAsmParser.cpp - Parse ARM assembly to MCInst instructions ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 #include "ARMBaseRegisterInfo.h"
12 #include "ARMSubtarget.h"
13 #include "MCTargetDesc/ARMAddressingModes.h"
14 #include "MCTargetDesc/ARMMCExpr.h"
15 #include "llvm/MC/MCParser/MCAsmLexer.h"
16 #include "llvm/MC/MCParser/MCAsmParser.h"
17 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
18 #include "llvm/MC/MCAsmInfo.h"
19 #include "llvm/MC/MCContext.h"
20 #include "llvm/MC/MCStreamer.h"
21 #include "llvm/MC/MCExpr.h"
22 #include "llvm/MC/MCInst.h"
23 #include "llvm/MC/MCSubtargetInfo.h"
24 #include "llvm/Target/TargetRegistry.h"
25 #include "llvm/Target/TargetAsmParser.h"
26 #include "llvm/Support/SourceMgr.h"
27 #include "llvm/Support/raw_ostream.h"
28 #include "llvm/ADT/OwningPtr.h"
29 #include "llvm/ADT/SmallVector.h"
30 #include "llvm/ADT/StringExtras.h"
31 #include "llvm/ADT/StringSwitch.h"
32 #include "llvm/ADT/Twine.h"
40 class ARMAsmParser : public TargetAsmParser {
44 MCAsmParser &getParser() const { return Parser; }
45 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
47 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
48 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
50 int TryParseRegister();
51 virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
52 bool TryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
53 int TryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
54 bool ParseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
55 bool ParseMemory(SmallVectorImpl<MCParsedAsmOperand*> &,
56 ARMII::AddrMode AddrMode);
57 bool ParseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
58 bool ParsePrefix(ARMMCExpr::VariantKind &RefKind);
59 const MCExpr *ApplyPrefixToExpr(const MCExpr *E,
60 MCSymbolRefExpr::VariantKind Variant);
63 bool ParseMemoryOffsetReg(bool &Negative,
64 bool &OffsetRegShifted,
65 enum ARM_AM::ShiftOpc &ShiftType,
66 const MCExpr *&ShiftAmount,
67 const MCExpr *&Offset,
71 bool ParseShift(enum ARM_AM::ShiftOpc &St,
72 const MCExpr *&ShiftAmount, SMLoc &E);
73 bool ParseDirectiveWord(unsigned Size, SMLoc L);
74 bool ParseDirectiveThumb(SMLoc L);
75 bool ParseDirectiveThumbFunc(SMLoc L);
76 bool ParseDirectiveCode(SMLoc L);
77 bool ParseDirectiveSyntax(SMLoc L);
79 bool MatchAndEmitInstruction(SMLoc IDLoc,
80 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
82 StringRef SplitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
83 bool &CarrySetting, unsigned &ProcessorIMod);
84 void GetMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
85 bool &CanAcceptPredicationCode);
87 bool isThumb() const {
88 // FIXME: Can tablegen auto-generate this?
89 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
91 bool isThumbOne() const {
92 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
95 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
96 setAvailableFeatures(FB);
99 /// @name Auto-generated Match Functions
102 #define GET_ASSEMBLER_HEADER
103 #include "ARMGenAsmMatcher.inc"
107 OperandMatchResultTy tryParseCoprocNumOperand(
108 SmallVectorImpl<MCParsedAsmOperand*>&);
109 OperandMatchResultTy tryParseCoprocRegOperand(
110 SmallVectorImpl<MCParsedAsmOperand*>&);
111 OperandMatchResultTy tryParseMemBarrierOptOperand(
112 SmallVectorImpl<MCParsedAsmOperand*>&);
113 OperandMatchResultTy tryParseProcIFlagsOperand(
114 SmallVectorImpl<MCParsedAsmOperand*>&);
115 OperandMatchResultTy tryParseMSRMaskOperand(
116 SmallVectorImpl<MCParsedAsmOperand*>&);
117 OperandMatchResultTy tryParseMemMode2Operand(
118 SmallVectorImpl<MCParsedAsmOperand*>&);
119 OperandMatchResultTy tryParseMemMode3Operand(
120 SmallVectorImpl<MCParsedAsmOperand*>&);
121 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
122 StringRef Op, int Low, int High);
123 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
124 return parsePKHImm(O, "lsl", 0, 31);
126 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
127 return parsePKHImm(O, "asr", 1, 32);
130 // Asm Match Converter Methods
131 bool CvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
132 const SmallVectorImpl<MCParsedAsmOperand*> &);
133 bool CvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
134 const SmallVectorImpl<MCParsedAsmOperand*> &);
135 bool CvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
136 const SmallVectorImpl<MCParsedAsmOperand*> &);
137 bool CvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
138 const SmallVectorImpl<MCParsedAsmOperand*> &);
141 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
142 : TargetAsmParser(), STI(_STI), Parser(_Parser) {
143 MCAsmParserExtension::Initialize(_Parser);
145 // Initialize the set of available features.
146 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
149 virtual bool ParseInstruction(StringRef Name, SMLoc NameLoc,
150 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
151 virtual bool ParseDirective(AsmToken DirectiveID);
153 } // end anonymous namespace
157 /// ARMOperand - Instances of this class represent a parsed ARM machine
159 class ARMOperand : public MCParsedAsmOperand {
180 SMLoc StartLoc, EndLoc;
181 SmallVector<unsigned, 8> Registers;
185 ARMCC::CondCodes Val;
197 ARM_PROC::IFlags Val;
217 /// Combined record for all forms of ARM address expressions.
219 ARMII::AddrMode AddrMode;
222 unsigned RegNum; ///< Offset register num, when OffsetIsReg.
223 const MCExpr *Value; ///< Offset value, when !OffsetIsReg.
225 const MCExpr *ShiftAmount; // used when OffsetRegShifted is true
226 enum ARM_AM::ShiftOpc ShiftType; // used when OffsetRegShifted is true
227 unsigned OffsetRegShifted : 1; // only used when OffsetIsReg is true
228 unsigned Preindexed : 1;
229 unsigned Postindexed : 1;
230 unsigned OffsetIsReg : 1;
231 unsigned Negative : 1; // only used when OffsetIsReg is true
232 unsigned Writeback : 1;
236 ARM_AM::ShiftOpc ShiftTy;
240 ARM_AM::ShiftOpc ShiftTy;
246 ARM_AM::ShiftOpc ShiftTy;
252 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
254 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
256 StartLoc = o.StartLoc;
270 case DPRRegisterList:
271 case SPRRegisterList:
272 Registers = o.Registers;
296 case ShiftedRegister:
297 ShiftedReg = o.ShiftedReg;
299 case ShiftedImmediate:
300 ShiftedImm = o.ShiftedImm;
305 /// getStartLoc - Get the location of the first token of this operand.
306 SMLoc getStartLoc() const { return StartLoc; }
307 /// getEndLoc - Get the location of the last token of this operand.
308 SMLoc getEndLoc() const { return EndLoc; }
310 ARMCC::CondCodes getCondCode() const {
311 assert(Kind == CondCode && "Invalid access!");
315 unsigned getCoproc() const {
316 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
320 StringRef getToken() const {
321 assert(Kind == Token && "Invalid access!");
322 return StringRef(Tok.Data, Tok.Length);
325 unsigned getReg() const {
326 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
330 const SmallVectorImpl<unsigned> &getRegList() const {
331 assert((Kind == RegisterList || Kind == DPRRegisterList ||
332 Kind == SPRRegisterList) && "Invalid access!");
336 const MCExpr *getImm() const {
337 assert(Kind == Immediate && "Invalid access!");
341 ARM_MB::MemBOpt getMemBarrierOpt() const {
342 assert(Kind == MemBarrierOpt && "Invalid access!");
346 ARM_PROC::IFlags getProcIFlags() const {
347 assert(Kind == ProcIFlags && "Invalid access!");
351 unsigned getMSRMask() const {
352 assert(Kind == MSRMask && "Invalid access!");
356 /// @name Memory Operand Accessors
358 ARMII::AddrMode getMemAddrMode() const {
361 unsigned getMemBaseRegNum() const {
362 return Mem.BaseRegNum;
364 unsigned getMemOffsetRegNum() const {
365 assert(Mem.OffsetIsReg && "Invalid access!");
366 return Mem.Offset.RegNum;
368 const MCExpr *getMemOffset() const {
369 assert(!Mem.OffsetIsReg && "Invalid access!");
370 return Mem.Offset.Value;
372 unsigned getMemOffsetRegShifted() const {
373 assert(Mem.OffsetIsReg && "Invalid access!");
374 return Mem.OffsetRegShifted;
376 const MCExpr *getMemShiftAmount() const {
377 assert(Mem.OffsetIsReg && Mem.OffsetRegShifted && "Invalid access!");
378 return Mem.ShiftAmount;
380 enum ARM_AM::ShiftOpc getMemShiftType() const {
381 assert(Mem.OffsetIsReg && Mem.OffsetRegShifted && "Invalid access!");
382 return Mem.ShiftType;
384 bool getMemPreindexed() const { return Mem.Preindexed; }
385 bool getMemPostindexed() const { return Mem.Postindexed; }
386 bool getMemOffsetIsReg() const { return Mem.OffsetIsReg; }
387 bool getMemNegative() const { return Mem.Negative; }
388 bool getMemWriteback() const { return Mem.Writeback; }
392 bool isCoprocNum() const { return Kind == CoprocNum; }
393 bool isCoprocReg() const { return Kind == CoprocReg; }
394 bool isCondCode() const { return Kind == CondCode; }
395 bool isCCOut() const { return Kind == CCOut; }
396 bool isImm() const { return Kind == Immediate; }
397 bool isImm0_255() const {
398 if (Kind != Immediate)
400 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
401 if (!CE) return false;
402 int64_t Value = CE->getValue();
403 return Value >= 0 && Value < 256;
405 bool isImm0_7() const {
406 if (Kind != Immediate)
408 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
409 if (!CE) return false;
410 int64_t Value = CE->getValue();
411 return Value >= 0 && Value < 8;
413 bool isImm0_15() const {
414 if (Kind != Immediate)
416 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
417 if (!CE) return false;
418 int64_t Value = CE->getValue();
419 return Value >= 0 && Value < 16;
421 bool isImm0_31() const {
422 if (Kind != Immediate)
424 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
425 if (!CE) return false;
426 int64_t Value = CE->getValue();
427 return Value >= 0 && Value < 32;
429 bool isImm0_65535() const {
430 if (Kind != Immediate)
432 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
433 if (!CE) return false;
434 int64_t Value = CE->getValue();
435 return Value >= 0 && Value < 65536;
437 bool isImm0_65535Expr() const {
438 if (Kind != Immediate)
440 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
441 // If it's not a constant expression, it'll generate a fixup and be
443 if (!CE) return true;
444 int64_t Value = CE->getValue();
445 return Value >= 0 && Value < 65536;
447 bool isPKHLSLImm() const {
448 if (Kind != Immediate)
450 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
451 if (!CE) return false;
452 int64_t Value = CE->getValue();
453 return Value >= 0 && Value < 32;
455 bool isPKHASRImm() const {
456 if (Kind != Immediate)
458 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
459 if (!CE) return false;
460 int64_t Value = CE->getValue();
461 return Value > 0 && Value <= 32;
463 bool isARMSOImm() const {
464 if (Kind != Immediate)
466 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
467 if (!CE) return false;
468 int64_t Value = CE->getValue();
469 return ARM_AM::getSOImmVal(Value) != -1;
471 bool isT2SOImm() const {
472 if (Kind != Immediate)
474 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
475 if (!CE) return false;
476 int64_t Value = CE->getValue();
477 return ARM_AM::getT2SOImmVal(Value) != -1;
479 bool isReg() const { return Kind == Register; }
480 bool isRegList() const { return Kind == RegisterList; }
481 bool isDPRRegList() const { return Kind == DPRRegisterList; }
482 bool isSPRRegList() const { return Kind == SPRRegisterList; }
483 bool isToken() const { return Kind == Token; }
484 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
485 bool isMemory() const { return Kind == Memory; }
486 bool isShifter() const { return Kind == Shifter; }
487 bool isShiftedReg() const { return Kind == ShiftedRegister; }
488 bool isShiftedImm() const { return Kind == ShiftedImmediate; }
489 bool isMemMode2() const {
490 if (getMemAddrMode() != ARMII::AddrMode2)
493 if (getMemOffsetIsReg())
496 if (getMemNegative() &&
497 !(getMemPostindexed() || getMemPreindexed()))
500 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
501 if (!CE) return false;
502 int64_t Value = CE->getValue();
504 // The offset must be in the range 0-4095 (imm12).
505 if (Value > 4095 || Value < -4095)
510 bool isMemMode3() const {
511 if (getMemAddrMode() != ARMII::AddrMode3)
514 if (getMemOffsetIsReg()) {
515 if (getMemOffsetRegShifted())
516 return false; // No shift with offset reg allowed
520 if (getMemNegative() &&
521 !(getMemPostindexed() || getMemPreindexed()))
524 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
525 if (!CE) return false;
526 int64_t Value = CE->getValue();
528 // The offset must be in the range 0-255 (imm8).
529 if (Value > 255 || Value < -255)
534 bool isMemMode5() const {
535 if (!isMemory() || getMemOffsetIsReg() || getMemWriteback() ||
539 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
540 if (!CE) return false;
542 // The offset must be a multiple of 4 in the range 0-1020.
543 int64_t Value = CE->getValue();
544 return ((Value & 0x3) == 0 && Value <= 1020 && Value >= -1020);
546 bool isMemMode7() const {
548 getMemPreindexed() ||
549 getMemPostindexed() ||
550 getMemOffsetIsReg() ||
555 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
556 if (!CE) return false;
563 bool isMemModeRegThumb() const {
564 if (!isMemory() || !getMemOffsetIsReg() || getMemWriteback())
568 bool isMemModeImmThumb() const {
569 if (!isMemory() || getMemOffsetIsReg() || getMemWriteback())
572 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
573 if (!CE) return false;
575 // The offset must be a multiple of 4 in the range 0-124.
576 uint64_t Value = CE->getValue();
577 return ((Value & 0x3) == 0 && Value <= 124);
579 bool isMSRMask() const { return Kind == MSRMask; }
580 bool isProcIFlags() const { return Kind == ProcIFlags; }
582 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
583 // Add as immediates when possible. Null MCExpr = 0.
585 Inst.addOperand(MCOperand::CreateImm(0));
586 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
587 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
589 Inst.addOperand(MCOperand::CreateExpr(Expr));
592 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
593 assert(N == 2 && "Invalid number of operands!");
594 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
595 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
596 Inst.addOperand(MCOperand::CreateReg(RegNum));
599 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
600 assert(N == 1 && "Invalid number of operands!");
601 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
604 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
605 assert(N == 1 && "Invalid number of operands!");
606 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
609 void addCCOutOperands(MCInst &Inst, unsigned N) const {
610 assert(N == 1 && "Invalid number of operands!");
611 Inst.addOperand(MCOperand::CreateReg(getReg()));
614 void addRegOperands(MCInst &Inst, unsigned N) const {
615 assert(N == 1 && "Invalid number of operands!");
616 Inst.addOperand(MCOperand::CreateReg(getReg()));
619 void addShiftedRegOperands(MCInst &Inst, unsigned N) const {
620 assert(N == 3 && "Invalid number of operands!");
621 assert(isShiftedReg() && "addShiftedRegOperands() on non ShiftedReg!");
622 Inst.addOperand(MCOperand::CreateReg(ShiftedReg.SrcReg));
623 Inst.addOperand(MCOperand::CreateReg(ShiftedReg.ShiftReg));
624 Inst.addOperand(MCOperand::CreateImm(
625 ARM_AM::getSORegOpc(ShiftedReg.ShiftTy, ShiftedReg.ShiftImm)));
628 void addShiftedImmOperands(MCInst &Inst, unsigned N) const {
629 assert(N == 2 && "Invalid number of operands!");
630 assert(isShiftedImm() && "addShiftedImmOperands() on non ShiftedImm!");
631 Inst.addOperand(MCOperand::CreateReg(ShiftedImm.SrcReg));
632 Inst.addOperand(MCOperand::CreateImm(
633 ARM_AM::getSORegOpc(ShiftedImm.ShiftTy, ShiftedImm.ShiftImm)));
637 void addShifterOperands(MCInst &Inst, unsigned N) const {
638 assert(N == 1 && "Invalid number of operands!");
639 Inst.addOperand(MCOperand::CreateImm(
640 ARM_AM::getSORegOpc(Shift.ShiftTy, 0)));
643 void addRegListOperands(MCInst &Inst, unsigned N) const {
644 assert(N == 1 && "Invalid number of operands!");
645 const SmallVectorImpl<unsigned> &RegList = getRegList();
646 for (SmallVectorImpl<unsigned>::const_iterator
647 I = RegList.begin(), E = RegList.end(); I != E; ++I)
648 Inst.addOperand(MCOperand::CreateReg(*I));
651 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
652 addRegListOperands(Inst, N);
655 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
656 addRegListOperands(Inst, N);
659 void addImmOperands(MCInst &Inst, unsigned N) const {
660 assert(N == 1 && "Invalid number of operands!");
661 addExpr(Inst, getImm());
664 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
665 assert(N == 1 && "Invalid number of operands!");
666 addExpr(Inst, getImm());
669 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
670 assert(N == 1 && "Invalid number of operands!");
671 addExpr(Inst, getImm());
674 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
675 assert(N == 1 && "Invalid number of operands!");
676 addExpr(Inst, getImm());
679 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
680 assert(N == 1 && "Invalid number of operands!");
681 addExpr(Inst, getImm());
684 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
685 assert(N == 1 && "Invalid number of operands!");
686 addExpr(Inst, getImm());
689 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
690 assert(N == 1 && "Invalid number of operands!");
691 addExpr(Inst, getImm());
694 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
695 assert(N == 1 && "Invalid number of operands!");
696 addExpr(Inst, getImm());
699 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
700 assert(N == 1 && "Invalid number of operands!");
701 // An ASR value of 32 encodes as 0, so that's how we want to add it to
702 // the instruction as well.
703 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
704 int Val = CE->getValue();
705 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
708 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
709 assert(N == 1 && "Invalid number of operands!");
710 addExpr(Inst, getImm());
713 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
714 assert(N == 1 && "Invalid number of operands!");
715 addExpr(Inst, getImm());
718 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
719 assert(N == 1 && "Invalid number of operands!");
720 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
723 void addMemMode7Operands(MCInst &Inst, unsigned N) const {
724 assert(N == 1 && isMemMode7() && "Invalid number of operands!");
725 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
727 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
729 assert((CE || CE->getValue() == 0) &&
730 "No offset operand support in mode 7");
733 void addMemMode2Operands(MCInst &Inst, unsigned N) const {
734 assert(isMemMode2() && "Invalid mode or number of operands!");
735 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
736 unsigned IdxMode = (getMemPreindexed() | getMemPostindexed() << 1);
738 if (getMemOffsetIsReg()) {
739 Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
741 ARM_AM::AddrOpc AMOpc = getMemNegative() ? ARM_AM::sub : ARM_AM::add;
742 ARM_AM::ShiftOpc ShOpc = ARM_AM::no_shift;
743 int64_t ShiftAmount = 0;
745 if (getMemOffsetRegShifted()) {
746 ShOpc = getMemShiftType();
747 const MCConstantExpr *CE =
748 dyn_cast<MCConstantExpr>(getMemShiftAmount());
749 ShiftAmount = CE->getValue();
752 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM2Opc(AMOpc, ShiftAmount,
757 // Create a operand placeholder to always yield the same number of operands.
758 Inst.addOperand(MCOperand::CreateReg(0));
760 // FIXME: #-0 is encoded differently than #0. Does the parser preserve
762 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
763 assert(CE && "Non-constant mode 2 offset operand!");
764 int64_t Offset = CE->getValue();
767 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM2Opc(ARM_AM::add,
768 Offset, ARM_AM::no_shift, IdxMode)));
770 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM2Opc(ARM_AM::sub,
771 -Offset, ARM_AM::no_shift, IdxMode)));
774 void addMemMode3Operands(MCInst &Inst, unsigned N) const {
775 assert(isMemMode3() && "Invalid mode or number of operands!");
776 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
777 unsigned IdxMode = (getMemPreindexed() | getMemPostindexed() << 1);
779 if (getMemOffsetIsReg()) {
780 Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
782 ARM_AM::AddrOpc AMOpc = getMemNegative() ? ARM_AM::sub : ARM_AM::add;
783 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(AMOpc, 0,
788 // Create a operand placeholder to always yield the same number of operands.
789 Inst.addOperand(MCOperand::CreateReg(0));
791 // FIXME: #-0 is encoded differently than #0. Does the parser preserve
793 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
794 assert(CE && "Non-constant mode 3 offset operand!");
795 int64_t Offset = CE->getValue();
798 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(ARM_AM::add,
801 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(ARM_AM::sub,
805 void addMemMode5Operands(MCInst &Inst, unsigned N) const {
806 assert(N == 2 && isMemMode5() && "Invalid number of operands!");
808 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
809 assert(!getMemOffsetIsReg() && "Invalid mode 5 operand");
811 // FIXME: #-0 is encoded differently than #0. Does the parser preserve
813 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
814 assert(CE && "Non-constant mode 5 offset operand!");
816 // The MCInst offset operand doesn't include the low two bits (like
817 // the instruction encoding).
818 int64_t Offset = CE->getValue() / 4;
820 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add,
823 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub,
827 void addMemModeRegThumbOperands(MCInst &Inst, unsigned N) const {
828 assert(N == 2 && isMemModeRegThumb() && "Invalid number of operands!");
829 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
830 Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
833 void addMemModeImmThumbOperands(MCInst &Inst, unsigned N) const {
834 assert(N == 2 && isMemModeImmThumb() && "Invalid number of operands!");
835 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
836 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
837 assert(CE && "Non-constant mode offset operand!");
838 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
841 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
842 assert(N == 1 && "Invalid number of operands!");
843 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
846 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
847 assert(N == 1 && "Invalid number of operands!");
848 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
851 virtual void print(raw_ostream &OS) const;
853 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
854 ARMOperand *Op = new ARMOperand(CondCode);
861 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
862 ARMOperand *Op = new ARMOperand(CoprocNum);
863 Op->Cop.Val = CopVal;
869 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
870 ARMOperand *Op = new ARMOperand(CoprocReg);
871 Op->Cop.Val = CopVal;
877 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
878 ARMOperand *Op = new ARMOperand(CCOut);
879 Op->Reg.RegNum = RegNum;
885 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
886 ARMOperand *Op = new ARMOperand(Token);
887 Op->Tok.Data = Str.data();
888 Op->Tok.Length = Str.size();
894 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
895 ARMOperand *Op = new ARMOperand(Register);
896 Op->Reg.RegNum = RegNum;
902 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
907 ARMOperand *Op = new ARMOperand(ShiftedRegister);
908 Op->ShiftedReg.ShiftTy = ShTy;
909 Op->ShiftedReg.SrcReg = SrcReg;
910 Op->ShiftedReg.ShiftReg = ShiftReg;
911 Op->ShiftedReg.ShiftImm = ShiftImm;
917 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
921 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
922 Op->ShiftedImm.ShiftTy = ShTy;
923 Op->ShiftedImm.SrcReg = SrcReg;
924 Op->ShiftedImm.ShiftImm = ShiftImm;
930 static ARMOperand *CreateShifter(ARM_AM::ShiftOpc ShTy,
932 ARMOperand *Op = new ARMOperand(Shifter);
933 Op->Shift.ShiftTy = ShTy;
940 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
941 SMLoc StartLoc, SMLoc EndLoc) {
942 KindTy Kind = RegisterList;
944 if (ARM::DPRRegClass.contains(Regs.front().first))
945 Kind = DPRRegisterList;
946 else if (ARM::SPRRegClass.contains(Regs.front().first))
947 Kind = SPRRegisterList;
949 ARMOperand *Op = new ARMOperand(Kind);
950 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
951 I = Regs.begin(), E = Regs.end(); I != E; ++I)
952 Op->Registers.push_back(I->first);
953 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
954 Op->StartLoc = StartLoc;
959 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
960 ARMOperand *Op = new ARMOperand(Immediate);
967 static ARMOperand *CreateMem(ARMII::AddrMode AddrMode, unsigned BaseRegNum,
968 bool OffsetIsReg, const MCExpr *Offset,
969 int OffsetRegNum, bool OffsetRegShifted,
970 enum ARM_AM::ShiftOpc ShiftType,
971 const MCExpr *ShiftAmount, bool Preindexed,
972 bool Postindexed, bool Negative, bool Writeback,
974 assert((OffsetRegNum == -1 || OffsetIsReg) &&
975 "OffsetRegNum must imply OffsetIsReg!");
976 assert((!OffsetRegShifted || OffsetIsReg) &&
977 "OffsetRegShifted must imply OffsetIsReg!");
978 assert((Offset || OffsetIsReg) &&
979 "Offset must exists unless register offset is used!");
980 assert((!ShiftAmount || (OffsetIsReg && OffsetRegShifted)) &&
981 "Cannot have shift amount without shifted register offset!");
982 assert((!Offset || !OffsetIsReg) &&
983 "Cannot have expression offset and register offset!");
985 ARMOperand *Op = new ARMOperand(Memory);
986 Op->Mem.AddrMode = AddrMode;
987 Op->Mem.BaseRegNum = BaseRegNum;
988 Op->Mem.OffsetIsReg = OffsetIsReg;
990 Op->Mem.Offset.RegNum = OffsetRegNum;
992 Op->Mem.Offset.Value = Offset;
993 Op->Mem.OffsetRegShifted = OffsetRegShifted;
994 Op->Mem.ShiftType = ShiftType;
995 Op->Mem.ShiftAmount = ShiftAmount;
996 Op->Mem.Preindexed = Preindexed;
997 Op->Mem.Postindexed = Postindexed;
998 Op->Mem.Negative = Negative;
999 Op->Mem.Writeback = Writeback;
1006 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1007 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1008 Op->MBOpt.Val = Opt;
1014 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1015 ARMOperand *Op = new ARMOperand(ProcIFlags);
1016 Op->IFlags.Val = IFlags;
1022 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1023 ARMOperand *Op = new ARMOperand(MSRMask);
1024 Op->MMask.Val = MMask;
1031 } // end anonymous namespace.
1033 void ARMOperand::print(raw_ostream &OS) const {
1036 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1039 OS << "<ccout " << getReg() << ">";
1042 OS << "<coprocessor number: " << getCoproc() << ">";
1045 OS << "<coprocessor register: " << getCoproc() << ">";
1048 OS << "<mask: " << getMSRMask() << ">";
1051 getImm()->print(OS);
1054 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1058 << "am:" << ARMII::AddrModeToString(getMemAddrMode())
1059 << " base:" << getMemBaseRegNum();
1060 if (getMemOffsetIsReg()) {
1061 OS << " offset:<register " << getMemOffsetRegNum();
1062 if (getMemOffsetRegShifted()) {
1063 OS << " offset-shift-type:" << getMemShiftType();
1064 OS << " offset-shift-amount:" << *getMemShiftAmount();
1067 OS << " offset:" << *getMemOffset();
1069 if (getMemOffsetIsReg())
1070 OS << " (offset-is-reg)";
1071 if (getMemPreindexed())
1072 OS << " (pre-indexed)";
1073 if (getMemPostindexed())
1074 OS << " (post-indexed)";
1075 if (getMemNegative())
1076 OS << " (negative)";
1077 if (getMemWriteback())
1078 OS << " (writeback)";
1082 OS << "<ARM_PROC::";
1083 unsigned IFlags = getProcIFlags();
1084 for (int i=2; i >= 0; --i)
1085 if (IFlags & (1 << i))
1086 OS << ARM_PROC::IFlagsToString(1 << i);
1091 OS << "<register " << getReg() << ">";
1094 OS << "<shifter " << ARM_AM::getShiftOpcStr(Shift.ShiftTy) << ">";
1096 case ShiftedRegister:
1097 OS << "<so_reg_reg "
1098 << ShiftedReg.SrcReg
1099 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(ShiftedReg.ShiftImm))
1100 << ", " << ShiftedReg.ShiftReg << ", "
1101 << ARM_AM::getSORegOffset(ShiftedReg.ShiftImm)
1104 case ShiftedImmediate:
1105 OS << "<so_reg_imm "
1106 << ShiftedImm.SrcReg
1107 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(ShiftedImm.ShiftImm))
1108 << ", " << ARM_AM::getSORegOffset(ShiftedImm.ShiftImm)
1112 case DPRRegisterList:
1113 case SPRRegisterList: {
1114 OS << "<register_list ";
1116 const SmallVectorImpl<unsigned> &RegList = getRegList();
1117 for (SmallVectorImpl<unsigned>::const_iterator
1118 I = RegList.begin(), E = RegList.end(); I != E; ) {
1120 if (++I < E) OS << ", ";
1127 OS << "'" << getToken() << "'";
1132 /// @name Auto-generated Match Functions
1135 static unsigned MatchRegisterName(StringRef Name);
1139 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1140 SMLoc &StartLoc, SMLoc &EndLoc) {
1141 RegNo = TryParseRegister();
1143 return (RegNo == (unsigned)-1);
1146 /// Try to parse a register name. The token must be an Identifier when called,
1147 /// and if it is a register name the token is eaten and the register number is
1148 /// returned. Otherwise return -1.
1150 int ARMAsmParser::TryParseRegister() {
1151 const AsmToken &Tok = Parser.getTok();
1152 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1154 // FIXME: Validate register for the current architecture; we have to do
1155 // validation later, so maybe there is no need for this here.
1156 std::string upperCase = Tok.getString().str();
1157 std::string lowerCase = LowercaseString(upperCase);
1158 unsigned RegNum = MatchRegisterName(lowerCase);
1160 RegNum = StringSwitch<unsigned>(lowerCase)
1161 .Case("r13", ARM::SP)
1162 .Case("r14", ARM::LR)
1163 .Case("r15", ARM::PC)
1164 .Case("ip", ARM::R12)
1167 if (!RegNum) return -1;
1169 Parser.Lex(); // Eat identifier token.
1173 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1174 // If a recoverable error occurs, return 1. If an irrecoverable error
1175 // occurs, return -1. An irrecoverable error is one where tokens have been
1176 // consumed in the process of trying to parse the shifter (i.e., when it is
1177 // indeed a shifter operand, but malformed).
1178 int ARMAsmParser::TryParseShiftRegister(
1179 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1180 SMLoc S = Parser.getTok().getLoc();
1181 const AsmToken &Tok = Parser.getTok();
1182 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1184 std::string upperCase = Tok.getString().str();
1185 std::string lowerCase = LowercaseString(upperCase);
1186 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1187 .Case("lsl", ARM_AM::lsl)
1188 .Case("lsr", ARM_AM::lsr)
1189 .Case("asr", ARM_AM::asr)
1190 .Case("ror", ARM_AM::ror)
1191 .Case("rrx", ARM_AM::rrx)
1192 .Default(ARM_AM::no_shift);
1194 if (ShiftTy == ARM_AM::no_shift)
1197 Parser.Lex(); // Eat the operator.
1199 // The source register for the shift has already been added to the
1200 // operand list, so we need to pop it off and combine it into the shifted
1201 // register operand instead.
1202 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1203 if (!PrevOp->isReg())
1204 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1205 int SrcReg = PrevOp->getReg();
1208 if (ShiftTy == ARM_AM::rrx) {
1209 // RRX Doesn't have an explicit shift amount. The encoder expects
1210 // the shift register to be the same as the source register. Seems odd,
1214 // Figure out if this is shifted by a constant or a register (for non-RRX).
1215 if (Parser.getTok().is(AsmToken::Hash)) {
1216 Parser.Lex(); // Eat hash.
1217 SMLoc ImmLoc = Parser.getTok().getLoc();
1218 const MCExpr *ShiftExpr = 0;
1219 if (getParser().ParseExpression(ShiftExpr)) {
1220 Error(ImmLoc, "invalid immediate shift value");
1223 // The expression must be evaluatable as an immediate.
1224 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1226 Error(ImmLoc, "invalid immediate shift value");
1229 // Range check the immediate.
1230 // lsl, ror: 0 <= imm <= 31
1231 // lsr, asr: 0 <= imm <= 32
1232 Imm = CE->getValue();
1234 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1235 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1236 Error(ImmLoc, "immediate shift value out of range");
1239 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1240 ShiftReg = TryParseRegister();
1241 SMLoc L = Parser.getTok().getLoc();
1242 if (ShiftReg == -1) {
1243 Error (L, "expected immediate or register in shift operand");
1247 Error (Parser.getTok().getLoc(),
1248 "expected immediate or register in shift operand");
1253 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1254 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1256 S, Parser.getTok().getLoc()));
1258 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1259 S, Parser.getTok().getLoc()));
1265 /// Try to parse a register name. The token must be an Identifier when called.
1266 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1267 /// if there is a "writeback". 'true' if it's not a register.
1269 /// TODO this is likely to change to allow different register types and or to
1270 /// parse for a specific register type.
1272 TryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1273 SMLoc S = Parser.getTok().getLoc();
1274 int RegNo = TryParseRegister();
1278 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1280 const AsmToken &ExclaimTok = Parser.getTok();
1281 if (ExclaimTok.is(AsmToken::Exclaim)) {
1282 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1283 ExclaimTok.getLoc()));
1284 Parser.Lex(); // Eat exclaim token
1290 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1291 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1293 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1294 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1296 switch (Name.size()) {
1299 if (Name[0] != CoprocOp)
1316 if (Name[0] != CoprocOp || Name[1] != '1')
1320 case '0': return 10;
1321 case '1': return 11;
1322 case '2': return 12;
1323 case '3': return 13;
1324 case '4': return 14;
1325 case '5': return 15;
1333 /// tryParseCoprocNumOperand - Try to parse an coprocessor number operand. The
1334 /// token must be an Identifier when called, and if it is a coprocessor
1335 /// number, the token is eaten and the operand is added to the operand list.
1336 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1337 tryParseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1338 SMLoc S = Parser.getTok().getLoc();
1339 const AsmToken &Tok = Parser.getTok();
1340 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1342 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1344 return MatchOperand_NoMatch;
1346 Parser.Lex(); // Eat identifier token.
1347 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1348 return MatchOperand_Success;
1351 /// tryParseCoprocRegOperand - Try to parse an coprocessor register operand. The
1352 /// token must be an Identifier when called, and if it is a coprocessor
1353 /// number, the token is eaten and the operand is added to the operand list.
1354 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1355 tryParseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1356 SMLoc S = Parser.getTok().getLoc();
1357 const AsmToken &Tok = Parser.getTok();
1358 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1360 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1362 return MatchOperand_NoMatch;
1364 Parser.Lex(); // Eat identifier token.
1365 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1366 return MatchOperand_Success;
1369 /// Parse a register list, return it if successful else return null. The first
1370 /// token must be a '{' when called.
1372 ParseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1373 assert(Parser.getTok().is(AsmToken::LCurly) &&
1374 "Token is not a Left Curly Brace");
1375 SMLoc S = Parser.getTok().getLoc();
1377 // Read the rest of the registers in the list.
1378 unsigned PrevRegNum = 0;
1379 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1382 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1383 Parser.Lex(); // Eat non-identifier token.
1385 const AsmToken &RegTok = Parser.getTok();
1386 SMLoc RegLoc = RegTok.getLoc();
1387 if (RegTok.isNot(AsmToken::Identifier)) {
1388 Error(RegLoc, "register expected");
1392 int RegNum = TryParseRegister();
1394 Error(RegLoc, "register expected");
1399 int Reg = PrevRegNum;
1402 Registers.push_back(std::make_pair(Reg, RegLoc));
1403 } while (Reg != RegNum);
1405 Registers.push_back(std::make_pair(RegNum, RegLoc));
1408 PrevRegNum = RegNum;
1409 } while (Parser.getTok().is(AsmToken::Comma) ||
1410 Parser.getTok().is(AsmToken::Minus));
1412 // Process the right curly brace of the list.
1413 const AsmToken &RCurlyTok = Parser.getTok();
1414 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1415 Error(RCurlyTok.getLoc(), "'}' expected");
1419 SMLoc E = RCurlyTok.getLoc();
1420 Parser.Lex(); // Eat right curly brace token.
1422 // Verify the register list.
1423 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1424 RI = Registers.begin(), RE = Registers.end();
1426 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1427 bool EmittedWarning = false;
1429 DenseMap<unsigned, bool> RegMap;
1430 RegMap[HighRegNum] = true;
1432 for (++RI; RI != RE; ++RI) {
1433 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1434 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1437 Error(RegInfo.second, "register duplicated in register list");
1441 if (!EmittedWarning && Reg < HighRegNum)
1442 Warning(RegInfo.second,
1443 "register not in ascending order in register list");
1446 HighRegNum = std::max(Reg, HighRegNum);
1449 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1453 /// tryParseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1454 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1455 tryParseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1456 SMLoc S = Parser.getTok().getLoc();
1457 const AsmToken &Tok = Parser.getTok();
1458 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1459 StringRef OptStr = Tok.getString();
1461 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1462 .Case("sy", ARM_MB::SY)
1463 .Case("st", ARM_MB::ST)
1464 .Case("sh", ARM_MB::ISH)
1465 .Case("ish", ARM_MB::ISH)
1466 .Case("shst", ARM_MB::ISHST)
1467 .Case("ishst", ARM_MB::ISHST)
1468 .Case("nsh", ARM_MB::NSH)
1469 .Case("un", ARM_MB::NSH)
1470 .Case("nshst", ARM_MB::NSHST)
1471 .Case("unst", ARM_MB::NSHST)
1472 .Case("osh", ARM_MB::OSH)
1473 .Case("oshst", ARM_MB::OSHST)
1477 return MatchOperand_NoMatch;
1479 Parser.Lex(); // Eat identifier token.
1480 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1481 return MatchOperand_Success;
1484 /// tryParseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1485 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1486 tryParseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1487 SMLoc S = Parser.getTok().getLoc();
1488 const AsmToken &Tok = Parser.getTok();
1489 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1490 StringRef IFlagsStr = Tok.getString();
1492 unsigned IFlags = 0;
1493 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1494 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1495 .Case("a", ARM_PROC::A)
1496 .Case("i", ARM_PROC::I)
1497 .Case("f", ARM_PROC::F)
1500 // If some specific iflag is already set, it means that some letter is
1501 // present more than once, this is not acceptable.
1502 if (Flag == ~0U || (IFlags & Flag))
1503 return MatchOperand_NoMatch;
1508 Parser.Lex(); // Eat identifier token.
1509 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1510 return MatchOperand_Success;
1513 /// tryParseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1514 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1515 tryParseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1516 SMLoc S = Parser.getTok().getLoc();
1517 const AsmToken &Tok = Parser.getTok();
1518 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1519 StringRef Mask = Tok.getString();
1521 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1522 size_t Start = 0, Next = Mask.find('_');
1523 StringRef Flags = "";
1524 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1525 if (Next != StringRef::npos)
1526 Flags = Mask.slice(Next+1, Mask.size());
1528 // FlagsVal contains the complete mask:
1530 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1531 unsigned FlagsVal = 0;
1533 if (SpecReg == "apsr") {
1534 FlagsVal = StringSwitch<unsigned>(Flags)
1535 .Case("nzcvq", 0x8) // same as CPSR_f
1536 .Case("g", 0x4) // same as CPSR_s
1537 .Case("nzcvqg", 0xc) // same as CPSR_fs
1540 if (FlagsVal == ~0U) {
1542 return MatchOperand_NoMatch;
1544 FlagsVal = 0; // No flag
1546 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1547 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1549 for (int i = 0, e = Flags.size(); i != e; ++i) {
1550 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1557 // If some specific flag is already set, it means that some letter is
1558 // present more than once, this is not acceptable.
1559 if (FlagsVal == ~0U || (FlagsVal & Flag))
1560 return MatchOperand_NoMatch;
1563 } else // No match for special register.
1564 return MatchOperand_NoMatch;
1566 // Special register without flags are equivalent to "fc" flags.
1570 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1571 if (SpecReg == "spsr")
1574 Parser.Lex(); // Eat identifier token.
1575 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1576 return MatchOperand_Success;
1579 /// tryParseMemMode2Operand - Try to parse memory addressing mode 2 operand.
1580 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1581 tryParseMemMode2Operand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1582 assert(Parser.getTok().is(AsmToken::LBrac) && "Token is not a \"[\"");
1584 if (ParseMemory(Operands, ARMII::AddrMode2))
1585 return MatchOperand_NoMatch;
1587 return MatchOperand_Success;
1590 /// tryParseMemMode3Operand - Try to parse memory addressing mode 3 operand.
1591 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1592 tryParseMemMode3Operand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1593 assert(Parser.getTok().is(AsmToken::LBrac) && "Token is not a \"[\"");
1595 if (ParseMemory(Operands, ARMII::AddrMode3))
1596 return MatchOperand_NoMatch;
1598 return MatchOperand_Success;
1601 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1602 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1603 int Low, int High) {
1604 const AsmToken &Tok = Parser.getTok();
1605 if (Tok.isNot(AsmToken::Identifier)) {
1606 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1607 return MatchOperand_ParseFail;
1609 StringRef ShiftName = Tok.getString();
1610 std::string LowerOp = LowercaseString(Op);
1611 std::string UpperOp = UppercaseString(Op);
1612 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1613 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1614 return MatchOperand_ParseFail;
1616 Parser.Lex(); // Eat shift type token.
1618 // There must be a '#' and a shift amount.
1619 if (Parser.getTok().isNot(AsmToken::Hash)) {
1620 Error(Parser.getTok().getLoc(), "'#' expected");
1621 return MatchOperand_ParseFail;
1623 Parser.Lex(); // Eat hash token.
1625 const MCExpr *ShiftAmount;
1626 SMLoc Loc = Parser.getTok().getLoc();
1627 if (getParser().ParseExpression(ShiftAmount)) {
1628 Error(Loc, "illegal expression");
1629 return MatchOperand_ParseFail;
1631 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1633 Error(Loc, "constant expression expected");
1634 return MatchOperand_ParseFail;
1636 int Val = CE->getValue();
1637 if (Val < Low || Val > High) {
1638 Error(Loc, "immediate value out of range");
1639 return MatchOperand_ParseFail;
1642 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1644 return MatchOperand_Success;
1647 /// CvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1648 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1649 /// when they refer multiple MIOperands inside a single one.
1651 CvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1652 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1653 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1655 // Create a writeback register dummy placeholder.
1656 Inst.addOperand(MCOperand::CreateImm(0));
1658 ((ARMOperand*)Operands[3])->addMemMode2Operands(Inst, 3);
1659 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1663 /// CvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1664 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1665 /// when they refer multiple MIOperands inside a single one.
1667 CvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1668 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1669 // Create a writeback register dummy placeholder.
1670 Inst.addOperand(MCOperand::CreateImm(0));
1671 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1672 ((ARMOperand*)Operands[3])->addMemMode2Operands(Inst, 3);
1673 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1677 /// CvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
1678 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1679 /// when they refer multiple MIOperands inside a single one.
1681 CvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
1682 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1683 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1685 // Create a writeback register dummy placeholder.
1686 Inst.addOperand(MCOperand::CreateImm(0));
1688 ((ARMOperand*)Operands[3])->addMemMode3Operands(Inst, 3);
1689 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1693 /// CvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
1694 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1695 /// when they refer multiple MIOperands inside a single one.
1697 CvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
1698 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1699 // Create a writeback register dummy placeholder.
1700 Inst.addOperand(MCOperand::CreateImm(0));
1701 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1702 ((ARMOperand*)Operands[3])->addMemMode3Operands(Inst, 3);
1703 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1707 /// Parse an ARM memory expression, return false if successful else return true
1708 /// or an error. The first token must be a '[' when called.
1710 /// TODO Only preindexing and postindexing addressing are started, unindexed
1711 /// with option, etc are still to do.
1713 ParseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
1714 ARMII::AddrMode AddrMode = ARMII::AddrModeNone) {
1716 assert(Parser.getTok().is(AsmToken::LBrac) &&
1717 "Token is not a Left Bracket");
1718 S = Parser.getTok().getLoc();
1719 Parser.Lex(); // Eat left bracket token.
1721 const AsmToken &BaseRegTok = Parser.getTok();
1722 if (BaseRegTok.isNot(AsmToken::Identifier)) {
1723 Error(BaseRegTok.getLoc(), "register expected");
1726 int BaseRegNum = TryParseRegister();
1727 if (BaseRegNum == -1) {
1728 Error(BaseRegTok.getLoc(), "register expected");
1732 // The next token must either be a comma or a closing bracket.
1733 const AsmToken &Tok = Parser.getTok();
1734 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
1737 bool Preindexed = false;
1738 bool Postindexed = false;
1739 bool OffsetIsReg = false;
1740 bool Negative = false;
1741 bool Writeback = false;
1742 ARMOperand *WBOp = 0;
1743 int OffsetRegNum = -1;
1744 bool OffsetRegShifted = false;
1745 enum ARM_AM::ShiftOpc ShiftType = ARM_AM::lsl;
1746 const MCExpr *ShiftAmount = 0;
1747 const MCExpr *Offset = 0;
1749 // First look for preindexed address forms, that is after the "[Rn" we now
1750 // have to see if the next token is a comma.
1751 if (Tok.is(AsmToken::Comma)) {
1753 Parser.Lex(); // Eat comma token.
1755 if (ParseMemoryOffsetReg(Negative, OffsetRegShifted, ShiftType, ShiftAmount,
1756 Offset, OffsetIsReg, OffsetRegNum, E))
1758 const AsmToken &RBracTok = Parser.getTok();
1759 if (RBracTok.isNot(AsmToken::RBrac)) {
1760 Error(RBracTok.getLoc(), "']' expected");
1763 E = RBracTok.getLoc();
1764 Parser.Lex(); // Eat right bracket token.
1766 const AsmToken &ExclaimTok = Parser.getTok();
1767 if (ExclaimTok.is(AsmToken::Exclaim)) {
1768 // None of addrmode3 instruction uses "!"
1769 if (AddrMode == ARMII::AddrMode3)
1772 WBOp = ARMOperand::CreateToken(ExclaimTok.getString(),
1773 ExclaimTok.getLoc());
1775 Parser.Lex(); // Eat exclaim token
1776 } else { // In addressing mode 2, pre-indexed mode always end with "!"
1777 if (AddrMode == ARMII::AddrMode2)
1781 // The "[Rn" we have so far was not followed by a comma.
1783 // If there's anything other than the right brace, this is a post indexing
1786 Parser.Lex(); // Eat right bracket token.
1788 const AsmToken &NextTok = Parser.getTok();
1790 if (NextTok.isNot(AsmToken::EndOfStatement)) {
1794 if (NextTok.isNot(AsmToken::Comma)) {
1795 Error(NextTok.getLoc(), "',' expected");
1799 Parser.Lex(); // Eat comma token.
1801 if (ParseMemoryOffsetReg(Negative, OffsetRegShifted, ShiftType,
1802 ShiftAmount, Offset, OffsetIsReg, OffsetRegNum,
1808 // Force Offset to exist if used.
1811 Offset = MCConstantExpr::Create(0, getContext());
1813 if (AddrMode == ARMII::AddrMode3 && OffsetRegShifted) {
1814 Error(E, "shift amount not supported");
1819 Operands.push_back(ARMOperand::CreateMem(AddrMode, BaseRegNum, OffsetIsReg,
1820 Offset, OffsetRegNum, OffsetRegShifted,
1821 ShiftType, ShiftAmount, Preindexed,
1822 Postindexed, Negative, Writeback, S, E));
1824 Operands.push_back(WBOp);
1829 /// Parse the offset of a memory operand after we have seen "[Rn," or "[Rn],"
1830 /// we will parse the following (were +/- means that a plus or minus is
1835 /// we return false on success or an error otherwise.
1836 bool ARMAsmParser::ParseMemoryOffsetReg(bool &Negative,
1837 bool &OffsetRegShifted,
1838 enum ARM_AM::ShiftOpc &ShiftType,
1839 const MCExpr *&ShiftAmount,
1840 const MCExpr *&Offset,
1845 OffsetRegShifted = false;
1846 OffsetIsReg = false;
1848 const AsmToken &NextTok = Parser.getTok();
1849 E = NextTok.getLoc();
1850 if (NextTok.is(AsmToken::Plus))
1851 Parser.Lex(); // Eat plus token.
1852 else if (NextTok.is(AsmToken::Minus)) {
1854 Parser.Lex(); // Eat minus token
1856 // See if there is a register following the "[Rn," or "[Rn]," we have so far.
1857 const AsmToken &OffsetRegTok = Parser.getTok();
1858 if (OffsetRegTok.is(AsmToken::Identifier)) {
1859 SMLoc CurLoc = OffsetRegTok.getLoc();
1860 OffsetRegNum = TryParseRegister();
1861 if (OffsetRegNum != -1) {
1867 // If we parsed a register as the offset then there can be a shift after that.
1868 if (OffsetRegNum != -1) {
1869 // Look for a comma then a shift
1870 const AsmToken &Tok = Parser.getTok();
1871 if (Tok.is(AsmToken::Comma)) {
1872 Parser.Lex(); // Eat comma token.
1874 const AsmToken &Tok = Parser.getTok();
1875 if (ParseShift(ShiftType, ShiftAmount, E))
1876 return Error(Tok.getLoc(), "shift expected");
1877 OffsetRegShifted = true;
1880 else { // the "[Rn," or "[Rn,]" we have so far was not followed by "Rm"
1881 // Look for #offset following the "[Rn," or "[Rn],"
1882 const AsmToken &HashTok = Parser.getTok();
1883 if (HashTok.isNot(AsmToken::Hash))
1884 return Error(HashTok.getLoc(), "'#' expected");
1886 Parser.Lex(); // Eat hash token.
1888 if (getParser().ParseExpression(Offset))
1890 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
1895 /// ParseShift as one of these two:
1896 /// ( lsl | lsr | asr | ror ) , # shift_amount
1898 /// and returns true if it parses a shift otherwise it returns false.
1899 bool ARMAsmParser::ParseShift(ARM_AM::ShiftOpc &St,
1900 const MCExpr *&ShiftAmount, SMLoc &E) {
1901 const AsmToken &Tok = Parser.getTok();
1902 if (Tok.isNot(AsmToken::Identifier))
1904 StringRef ShiftName = Tok.getString();
1905 if (ShiftName == "lsl" || ShiftName == "LSL")
1907 else if (ShiftName == "lsr" || ShiftName == "LSR")
1909 else if (ShiftName == "asr" || ShiftName == "ASR")
1911 else if (ShiftName == "ror" || ShiftName == "ROR")
1913 else if (ShiftName == "rrx" || ShiftName == "RRX")
1917 Parser.Lex(); // Eat shift type token.
1919 // Rrx stands alone.
1920 if (St == ARM_AM::rrx)
1923 // Otherwise, there must be a '#' and a shift amount.
1924 const AsmToken &HashTok = Parser.getTok();
1925 if (HashTok.isNot(AsmToken::Hash))
1926 return Error(HashTok.getLoc(), "'#' expected");
1927 Parser.Lex(); // Eat hash token.
1929 if (getParser().ParseExpression(ShiftAmount))
1935 /// Parse a arm instruction operand. For now this parses the operand regardless
1936 /// of the mnemonic.
1937 bool ARMAsmParser::ParseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
1938 StringRef Mnemonic) {
1941 // Check if the current operand has a custom associated parser, if so, try to
1942 // custom parse the operand, or fallback to the general approach.
1943 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
1944 if (ResTy == MatchOperand_Success)
1946 // If there wasn't a custom match, try the generic matcher below. Otherwise,
1947 // there was a match, but an error occurred, in which case, just return that
1948 // the operand parsing failed.
1949 if (ResTy == MatchOperand_ParseFail)
1952 switch (getLexer().getKind()) {
1954 Error(Parser.getTok().getLoc(), "unexpected token in operand");
1956 case AsmToken::Identifier: {
1957 if (!TryParseRegisterWithWriteBack(Operands))
1959 int Res = TryParseShiftRegister(Operands);
1960 if (Res == 0) // success
1962 else if (Res == -1) // irrecoverable error
1965 // Fall though for the Identifier case that is not a register or a
1968 case AsmToken::Integer: // things like 1f and 2b as a branch targets
1969 case AsmToken::Dot: { // . as a branch target
1970 // This was not a register so parse other operands that start with an
1971 // identifier (like labels) as expressions and create them as immediates.
1972 const MCExpr *IdVal;
1973 S = Parser.getTok().getLoc();
1974 if (getParser().ParseExpression(IdVal))
1976 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
1977 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
1980 case AsmToken::LBrac:
1981 return ParseMemory(Operands);
1982 case AsmToken::LCurly:
1983 return ParseRegisterList(Operands);
1984 case AsmToken::Hash:
1985 // #42 -> immediate.
1986 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
1987 S = Parser.getTok().getLoc();
1989 const MCExpr *ImmVal;
1990 if (getParser().ParseExpression(ImmVal))
1992 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
1993 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
1995 case AsmToken::Colon: {
1996 // ":lower16:" and ":upper16:" expression prefixes
1997 // FIXME: Check it's an expression prefix,
1998 // e.g. (FOO - :lower16:BAR) isn't legal.
1999 ARMMCExpr::VariantKind RefKind;
2000 if (ParsePrefix(RefKind))
2003 const MCExpr *SubExprVal;
2004 if (getParser().ParseExpression(SubExprVal))
2007 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2009 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2010 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2016 // ParsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2017 // :lower16: and :upper16:.
2018 bool ARMAsmParser::ParsePrefix(ARMMCExpr::VariantKind &RefKind) {
2019 RefKind = ARMMCExpr::VK_ARM_None;
2021 // :lower16: and :upper16: modifiers
2022 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2023 Parser.Lex(); // Eat ':'
2025 if (getLexer().isNot(AsmToken::Identifier)) {
2026 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2030 StringRef IDVal = Parser.getTok().getIdentifier();
2031 if (IDVal == "lower16") {
2032 RefKind = ARMMCExpr::VK_ARM_LO16;
2033 } else if (IDVal == "upper16") {
2034 RefKind = ARMMCExpr::VK_ARM_HI16;
2036 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2041 if (getLexer().isNot(AsmToken::Colon)) {
2042 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2045 Parser.Lex(); // Eat the last ':'
2050 ARMAsmParser::ApplyPrefixToExpr(const MCExpr *E,
2051 MCSymbolRefExpr::VariantKind Variant) {
2052 // Recurse over the given expression, rebuilding it to apply the given variant
2053 // to the leftmost symbol.
2054 if (Variant == MCSymbolRefExpr::VK_None)
2057 switch (E->getKind()) {
2058 case MCExpr::Target:
2059 llvm_unreachable("Can't handle target expr yet");
2060 case MCExpr::Constant:
2061 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2063 case MCExpr::SymbolRef: {
2064 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2066 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2069 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2073 llvm_unreachable("Can't handle unary expressions yet");
2075 case MCExpr::Binary: {
2076 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2077 const MCExpr *LHS = ApplyPrefixToExpr(BE->getLHS(), Variant);
2078 const MCExpr *RHS = BE->getRHS();
2082 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2086 assert(0 && "Invalid expression kind!");
2090 /// \brief Given a mnemonic, split out possible predication code and carry
2091 /// setting letters to form a canonical mnemonic and flags.
2093 // FIXME: Would be nice to autogen this.
2094 StringRef ARMAsmParser::SplitMnemonic(StringRef Mnemonic,
2095 unsigned &PredicationCode,
2097 unsigned &ProcessorIMod) {
2098 PredicationCode = ARMCC::AL;
2099 CarrySetting = false;
2102 // Ignore some mnemonics we know aren't predicated forms.
2104 // FIXME: Would be nice to autogen this.
2105 if ((Mnemonic == "movs" && isThumb()) ||
2106 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2107 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2108 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2109 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2110 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2111 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2112 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2115 // First, split out any predication code. Ignore mnemonics we know aren't
2116 // predicated but do have a carry-set and so weren't caught above.
2117 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2118 Mnemonic != "muls") {
2119 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2120 .Case("eq", ARMCC::EQ)
2121 .Case("ne", ARMCC::NE)
2122 .Case("hs", ARMCC::HS)
2123 .Case("cs", ARMCC::HS)
2124 .Case("lo", ARMCC::LO)
2125 .Case("cc", ARMCC::LO)
2126 .Case("mi", ARMCC::MI)
2127 .Case("pl", ARMCC::PL)
2128 .Case("vs", ARMCC::VS)
2129 .Case("vc", ARMCC::VC)
2130 .Case("hi", ARMCC::HI)
2131 .Case("ls", ARMCC::LS)
2132 .Case("ge", ARMCC::GE)
2133 .Case("lt", ARMCC::LT)
2134 .Case("gt", ARMCC::GT)
2135 .Case("le", ARMCC::LE)
2136 .Case("al", ARMCC::AL)
2139 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2140 PredicationCode = CC;
2144 // Next, determine if we have a carry setting bit. We explicitly ignore all
2145 // the instructions we know end in 's'.
2146 if (Mnemonic.endswith("s") &&
2147 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
2148 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2149 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2150 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2151 Mnemonic == "vrsqrts" || (Mnemonic == "movs" && isThumb()))) {
2152 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2153 CarrySetting = true;
2156 // The "cps" instruction can have a interrupt mode operand which is glued into
2157 // the mnemonic. Check if this is the case, split it and parse the imod op
2158 if (Mnemonic.startswith("cps")) {
2159 // Split out any imod code.
2161 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2162 .Case("ie", ARM_PROC::IE)
2163 .Case("id", ARM_PROC::ID)
2166 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2167 ProcessorIMod = IMod;
2174 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2175 /// inclusion of carry set or predication code operands.
2177 // FIXME: It would be nice to autogen this.
2179 GetMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2180 bool &CanAcceptPredicationCode) {
2181 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2182 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2183 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2184 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2185 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2186 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2187 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2188 Mnemonic == "eor" || Mnemonic == "smlal" ||
2189 (Mnemonic == "mov" && !isThumbOne())) {
2190 CanAcceptCarrySet = true;
2192 CanAcceptCarrySet = false;
2195 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2196 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2197 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2198 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2199 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2200 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2201 CanAcceptPredicationCode = false;
2203 CanAcceptPredicationCode = true;
2207 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2208 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2209 CanAcceptPredicationCode = false;
2212 /// Parse an arm instruction mnemonic followed by its operands.
2213 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2214 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2215 // Create the leading tokens for the mnemonic, split by '.' characters.
2216 size_t Start = 0, Next = Name.find('.');
2217 StringRef Mnemonic = Name.slice(Start, Next);
2219 // Split out the predication code and carry setting flag from the mnemonic.
2220 unsigned PredicationCode;
2221 unsigned ProcessorIMod;
2223 Mnemonic = SplitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2226 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2228 // FIXME: This is all a pretty gross hack. We should automatically handle
2229 // optional operands like this via tblgen.
2231 // Next, add the CCOut and ConditionCode operands, if needed.
2233 // For mnemonics which can ever incorporate a carry setting bit or predication
2234 // code, our matching model involves us always generating CCOut and
2235 // ConditionCode operands to match the mnemonic "as written" and then we let
2236 // the matcher deal with finding the right instruction or generating an
2237 // appropriate error.
2238 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2239 GetMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2241 // If we had a carry-set on an instruction that can't do that, issue an
2243 if (!CanAcceptCarrySet && CarrySetting) {
2244 Parser.EatToEndOfStatement();
2245 return Error(NameLoc, "instruction '" + Mnemonic +
2246 "' can not set flags, but 's' suffix specified");
2249 // Add the carry setting operand, if necessary.
2251 // FIXME: It would be awesome if we could somehow invent a location such that
2252 // match errors on this operand would print a nice diagnostic about how the
2253 // 's' character in the mnemonic resulted in a CCOut operand.
2254 if (CanAcceptCarrySet)
2255 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2258 // Add the predication code operand, if necessary.
2259 if (CanAcceptPredicationCode) {
2260 Operands.push_back(ARMOperand::CreateCondCode(
2261 ARMCC::CondCodes(PredicationCode), NameLoc));
2263 // This mnemonic can't ever accept a predication code, but the user wrote
2264 // one (or misspelled another mnemonic).
2266 // FIXME: Issue a nice error.
2269 // Add the processor imod operand, if necessary.
2270 if (ProcessorIMod) {
2271 Operands.push_back(ARMOperand::CreateImm(
2272 MCConstantExpr::Create(ProcessorIMod, getContext()),
2275 // This mnemonic can't ever accept a imod, but the user wrote
2276 // one (or misspelled another mnemonic).
2278 // FIXME: Issue a nice error.
2281 // Add the remaining tokens in the mnemonic.
2282 while (Next != StringRef::npos) {
2284 Next = Name.find('.', Start + 1);
2285 StringRef ExtraToken = Name.slice(Start, Next);
2287 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2290 // Read the remaining operands.
2291 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2292 // Read the first operand.
2293 if (ParseOperand(Operands, Mnemonic)) {
2294 Parser.EatToEndOfStatement();
2298 while (getLexer().is(AsmToken::Comma)) {
2299 Parser.Lex(); // Eat the comma.
2301 // Parse and remember the operand.
2302 if (ParseOperand(Operands, Mnemonic)) {
2303 Parser.EatToEndOfStatement();
2309 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2310 Parser.EatToEndOfStatement();
2311 return TokError("unexpected token in argument list");
2314 Parser.Lex(); // Consume the EndOfStatement
2317 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2318 // another does not. Specifically, the MOVW instruction does not. So we
2319 // special case it here and remove the defaulted (non-setting) cc_out
2320 // operand if that's the instruction we're trying to match.
2322 // We do this post-processing of the explicit operands rather than just
2323 // conditionally adding the cc_out in the first place because we need
2324 // to check the type of the parsed immediate operand.
2325 if (Mnemonic == "mov" && Operands.size() > 4 &&
2326 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2327 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2328 static_cast<ARMOperand*>(Operands[1])->getReg() == 0) {
2329 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2330 Operands.erase(Operands.begin() + 1);
2338 MatchAndEmitInstruction(SMLoc IDLoc,
2339 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2343 MatchResultTy MatchResult;
2344 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2345 switch (MatchResult) {
2347 Out.EmitInstruction(Inst);
2349 case Match_MissingFeature:
2350 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2352 case Match_InvalidOperand: {
2353 SMLoc ErrorLoc = IDLoc;
2354 if (ErrorInfo != ~0U) {
2355 if (ErrorInfo >= Operands.size())
2356 return Error(IDLoc, "too few operands for instruction");
2358 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2359 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2362 return Error(ErrorLoc, "invalid operand for instruction");
2364 case Match_MnemonicFail:
2365 return Error(IDLoc, "unrecognized instruction mnemonic");
2366 case Match_ConversionFail:
2367 return Error(IDLoc, "unable to convert operands to instruction");
2370 llvm_unreachable("Implement any new match types added!");
2374 /// ParseDirective parses the arm specific directives
2375 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2376 StringRef IDVal = DirectiveID.getIdentifier();
2377 if (IDVal == ".word")
2378 return ParseDirectiveWord(4, DirectiveID.getLoc());
2379 else if (IDVal == ".thumb")
2380 return ParseDirectiveThumb(DirectiveID.getLoc());
2381 else if (IDVal == ".thumb_func")
2382 return ParseDirectiveThumbFunc(DirectiveID.getLoc());
2383 else if (IDVal == ".code")
2384 return ParseDirectiveCode(DirectiveID.getLoc());
2385 else if (IDVal == ".syntax")
2386 return ParseDirectiveSyntax(DirectiveID.getLoc());
2390 /// ParseDirectiveWord
2391 /// ::= .word [ expression (, expression)* ]
2392 bool ARMAsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
2393 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2395 const MCExpr *Value;
2396 if (getParser().ParseExpression(Value))
2399 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2401 if (getLexer().is(AsmToken::EndOfStatement))
2404 // FIXME: Improve diagnostic.
2405 if (getLexer().isNot(AsmToken::Comma))
2406 return Error(L, "unexpected token in directive");
2415 /// ParseDirectiveThumb
2417 bool ARMAsmParser::ParseDirectiveThumb(SMLoc L) {
2418 if (getLexer().isNot(AsmToken::EndOfStatement))
2419 return Error(L, "unexpected token in directive");
2422 // TODO: set thumb mode
2423 // TODO: tell the MC streamer the mode
2424 // getParser().getStreamer().Emit???();
2428 /// ParseDirectiveThumbFunc
2429 /// ::= .thumbfunc symbol_name
2430 bool ARMAsmParser::ParseDirectiveThumbFunc(SMLoc L) {
2431 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
2432 bool isMachO = MAI.hasSubsectionsViaSymbols();
2435 // Darwin asm has function name after .thumb_func direction
2438 const AsmToken &Tok = Parser.getTok();
2439 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
2440 return Error(L, "unexpected token in .thumb_func directive");
2441 Name = Tok.getString();
2442 Parser.Lex(); // Consume the identifier token.
2445 if (getLexer().isNot(AsmToken::EndOfStatement))
2446 return Error(L, "unexpected token in directive");
2449 // FIXME: assuming function name will be the line following .thumb_func
2451 Name = Parser.getTok().getString();
2454 // Mark symbol as a thumb symbol.
2455 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
2456 getParser().getStreamer().EmitThumbFunc(Func);
2460 /// ParseDirectiveSyntax
2461 /// ::= .syntax unified | divided
2462 bool ARMAsmParser::ParseDirectiveSyntax(SMLoc L) {
2463 const AsmToken &Tok = Parser.getTok();
2464 if (Tok.isNot(AsmToken::Identifier))
2465 return Error(L, "unexpected token in .syntax directive");
2466 StringRef Mode = Tok.getString();
2467 if (Mode == "unified" || Mode == "UNIFIED")
2469 else if (Mode == "divided" || Mode == "DIVIDED")
2470 return Error(L, "'.syntax divided' arm asssembly not supported");
2472 return Error(L, "unrecognized syntax mode in .syntax directive");
2474 if (getLexer().isNot(AsmToken::EndOfStatement))
2475 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2478 // TODO tell the MC streamer the mode
2479 // getParser().getStreamer().Emit???();
2483 /// ParseDirectiveCode
2484 /// ::= .code 16 | 32
2485 bool ARMAsmParser::ParseDirectiveCode(SMLoc L) {
2486 const AsmToken &Tok = Parser.getTok();
2487 if (Tok.isNot(AsmToken::Integer))
2488 return Error(L, "unexpected token in .code directive");
2489 int64_t Val = Parser.getTok().getIntVal();
2495 return Error(L, "invalid operand to .code directive");
2497 if (getLexer().isNot(AsmToken::EndOfStatement))
2498 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2504 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
2508 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
2514 extern "C" void LLVMInitializeARMAsmLexer();
2516 /// Force static initialization.
2517 extern "C" void LLVMInitializeARMAsmParser() {
2518 RegisterAsmParser<ARMAsmParser> X(TheARMTarget);
2519 RegisterAsmParser<ARMAsmParser> Y(TheThumbTarget);
2520 LLVMInitializeARMAsmLexer();
2523 #define GET_REGISTER_MATCHER
2524 #define GET_MATCHER_IMPLEMENTATION
2525 #include "ARMGenAsmMatcher.inc"