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 "ARMAddressingModes.h"
12 #include "ARMMCExpr.h"
13 #include "ARMBaseRegisterInfo.h"
14 #include "ARMSubtarget.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"
34 #define GET_SUBTARGETINFO_ENUM
35 #include "ARMGenSubtargetInfo.inc"
43 class ARMAsmParser : public TargetAsmParser {
47 MCAsmParser &getParser() const { return Parser; }
48 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
50 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
51 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
53 int TryParseRegister();
54 virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
55 bool TryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
56 bool TryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
57 bool ParseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
58 bool ParseMemory(SmallVectorImpl<MCParsedAsmOperand*> &,
59 ARMII::AddrMode AddrMode);
60 bool ParseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
61 bool ParsePrefix(ARMMCExpr::VariantKind &RefKind);
62 const MCExpr *ApplyPrefixToExpr(const MCExpr *E,
63 MCSymbolRefExpr::VariantKind Variant);
66 bool ParseMemoryOffsetReg(bool &Negative,
67 bool &OffsetRegShifted,
68 enum ARM_AM::ShiftOpc &ShiftType,
69 const MCExpr *&ShiftAmount,
70 const MCExpr *&Offset,
74 bool ParseShift(enum ARM_AM::ShiftOpc &St,
75 const MCExpr *&ShiftAmount, SMLoc &E);
76 bool ParseDirectiveWord(unsigned Size, SMLoc L);
77 bool ParseDirectiveThumb(SMLoc L);
78 bool ParseDirectiveThumbFunc(SMLoc L);
79 bool ParseDirectiveCode(SMLoc L);
80 bool ParseDirectiveSyntax(SMLoc L);
82 bool MatchAndEmitInstruction(SMLoc IDLoc,
83 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
85 void GetMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
86 bool &CanAcceptPredicationCode);
88 bool isThumb() const {
89 // FIXME: Can tablegen auto-generate this?
90 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
92 bool isThumbOne() const {
93 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
96 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
97 setAvailableFeatures(FB);
100 /// @name Auto-generated Match Functions
103 #define GET_ASSEMBLER_HEADER
104 #include "ARMGenAsmMatcher.inc"
108 OperandMatchResultTy tryParseCoprocNumOperand(
109 SmallVectorImpl<MCParsedAsmOperand*>&);
110 OperandMatchResultTy tryParseCoprocRegOperand(
111 SmallVectorImpl<MCParsedAsmOperand*>&);
112 OperandMatchResultTy tryParseMemBarrierOptOperand(
113 SmallVectorImpl<MCParsedAsmOperand*>&);
114 OperandMatchResultTy tryParseProcIFlagsOperand(
115 SmallVectorImpl<MCParsedAsmOperand*>&);
116 OperandMatchResultTy tryParseMSRMaskOperand(
117 SmallVectorImpl<MCParsedAsmOperand*>&);
118 OperandMatchResultTy tryParseMemMode2Operand(
119 SmallVectorImpl<MCParsedAsmOperand*>&);
120 OperandMatchResultTy tryParseMemMode3Operand(
121 SmallVectorImpl<MCParsedAsmOperand*>&);
123 // Asm Match Converter Methods
124 bool CvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
125 const SmallVectorImpl<MCParsedAsmOperand*> &);
126 bool CvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
127 const SmallVectorImpl<MCParsedAsmOperand*> &);
128 bool CvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
129 const SmallVectorImpl<MCParsedAsmOperand*> &);
130 bool CvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
131 const SmallVectorImpl<MCParsedAsmOperand*> &);
134 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
135 : TargetAsmParser(), STI(_STI), Parser(_Parser) {
136 MCAsmParserExtension::Initialize(_Parser);
138 // Initialize the set of available features.
139 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
142 virtual bool ParseInstruction(StringRef Name, SMLoc NameLoc,
143 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
144 virtual bool ParseDirective(AsmToken DirectiveID);
146 } // end anonymous namespace
150 /// ARMOperand - Instances of this class represent a parsed ARM machine
152 class ARMOperand : public MCParsedAsmOperand {
172 SMLoc StartLoc, EndLoc;
173 SmallVector<unsigned, 8> Registers;
177 ARMCC::CondCodes Val;
189 ARM_PROC::IFlags Val;
209 /// Combined record for all forms of ARM address expressions.
211 ARMII::AddrMode AddrMode;
214 unsigned RegNum; ///< Offset register num, when OffsetIsReg.
215 const MCExpr *Value; ///< Offset value, when !OffsetIsReg.
217 const MCExpr *ShiftAmount; // used when OffsetRegShifted is true
218 enum ARM_AM::ShiftOpc ShiftType; // used when OffsetRegShifted is true
219 unsigned OffsetRegShifted : 1; // only used when OffsetIsReg is true
220 unsigned Preindexed : 1;
221 unsigned Postindexed : 1;
222 unsigned OffsetIsReg : 1;
223 unsigned Negative : 1; // only used when OffsetIsReg is true
224 unsigned Writeback : 1;
228 ARM_AM::ShiftOpc ShiftTy;
232 ARM_AM::ShiftOpc ShiftTy;
239 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
241 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
243 StartLoc = o.StartLoc;
257 case DPRRegisterList:
258 case SPRRegisterList:
259 Registers = o.Registers;
283 case ShiftedRegister:
284 ShiftedReg = o.ShiftedReg;
289 /// getStartLoc - Get the location of the first token of this operand.
290 SMLoc getStartLoc() const { return StartLoc; }
291 /// getEndLoc - Get the location of the last token of this operand.
292 SMLoc getEndLoc() const { return EndLoc; }
294 ARMCC::CondCodes getCondCode() const {
295 assert(Kind == CondCode && "Invalid access!");
299 unsigned getCoproc() const {
300 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
304 StringRef getToken() const {
305 assert(Kind == Token && "Invalid access!");
306 return StringRef(Tok.Data, Tok.Length);
309 unsigned getReg() const {
310 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
314 const SmallVectorImpl<unsigned> &getRegList() const {
315 assert((Kind == RegisterList || Kind == DPRRegisterList ||
316 Kind == SPRRegisterList) && "Invalid access!");
320 const MCExpr *getImm() const {
321 assert(Kind == Immediate && "Invalid access!");
325 ARM_MB::MemBOpt getMemBarrierOpt() const {
326 assert(Kind == MemBarrierOpt && "Invalid access!");
330 ARM_PROC::IFlags getProcIFlags() const {
331 assert(Kind == ProcIFlags && "Invalid access!");
335 unsigned getMSRMask() const {
336 assert(Kind == MSRMask && "Invalid access!");
340 /// @name Memory Operand Accessors
342 ARMII::AddrMode getMemAddrMode() const {
345 unsigned getMemBaseRegNum() const {
346 return Mem.BaseRegNum;
348 unsigned getMemOffsetRegNum() const {
349 assert(Mem.OffsetIsReg && "Invalid access!");
350 return Mem.Offset.RegNum;
352 const MCExpr *getMemOffset() const {
353 assert(!Mem.OffsetIsReg && "Invalid access!");
354 return Mem.Offset.Value;
356 unsigned getMemOffsetRegShifted() const {
357 assert(Mem.OffsetIsReg && "Invalid access!");
358 return Mem.OffsetRegShifted;
360 const MCExpr *getMemShiftAmount() const {
361 assert(Mem.OffsetIsReg && Mem.OffsetRegShifted && "Invalid access!");
362 return Mem.ShiftAmount;
364 enum ARM_AM::ShiftOpc getMemShiftType() const {
365 assert(Mem.OffsetIsReg && Mem.OffsetRegShifted && "Invalid access!");
366 return Mem.ShiftType;
368 bool getMemPreindexed() const { return Mem.Preindexed; }
369 bool getMemPostindexed() const { return Mem.Postindexed; }
370 bool getMemOffsetIsReg() const { return Mem.OffsetIsReg; }
371 bool getMemNegative() const { return Mem.Negative; }
372 bool getMemWriteback() const { return Mem.Writeback; }
376 bool isCoprocNum() const { return Kind == CoprocNum; }
377 bool isCoprocReg() const { return Kind == CoprocReg; }
378 bool isCondCode() const { return Kind == CondCode; }
379 bool isCCOut() const { return Kind == CCOut; }
380 bool isImm() const { return Kind == Immediate; }
381 bool isImm0_255() const {
382 if (Kind != Immediate)
384 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
385 if (!CE) return false;
386 int64_t Value = CE->getValue();
387 return Value >= 0 && Value < 256;
389 bool isT2SOImm() const {
390 if (Kind != Immediate)
392 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
393 if (!CE) return false;
394 int64_t Value = CE->getValue();
395 return ARM_AM::getT2SOImmVal(Value) != -1;
397 bool isReg() const { return Kind == Register; }
398 bool isRegList() const { return Kind == RegisterList; }
399 bool isDPRRegList() const { return Kind == DPRRegisterList; }
400 bool isSPRRegList() const { return Kind == SPRRegisterList; }
401 bool isToken() const { return Kind == Token; }
402 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
403 bool isMemory() const { return Kind == Memory; }
404 bool isShifter() const { return Kind == Shifter; }
405 bool isShiftedReg() const { return Kind == ShiftedRegister; }
406 bool isMemMode2() const {
407 if (getMemAddrMode() != ARMII::AddrMode2)
410 if (getMemOffsetIsReg())
413 if (getMemNegative() &&
414 !(getMemPostindexed() || getMemPreindexed()))
417 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
418 if (!CE) return false;
419 int64_t Value = CE->getValue();
421 // The offset must be in the range 0-4095 (imm12).
422 if (Value > 4095 || Value < -4095)
427 bool isMemMode3() const {
428 if (getMemAddrMode() != ARMII::AddrMode3)
431 if (getMemOffsetIsReg()) {
432 if (getMemOffsetRegShifted())
433 return false; // No shift with offset reg allowed
437 if (getMemNegative() &&
438 !(getMemPostindexed() || getMemPreindexed()))
441 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
442 if (!CE) return false;
443 int64_t Value = CE->getValue();
445 // The offset must be in the range 0-255 (imm8).
446 if (Value > 255 || Value < -255)
451 bool isMemMode5() const {
452 if (!isMemory() || getMemOffsetIsReg() || getMemWriteback() ||
456 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
457 if (!CE) return false;
459 // The offset must be a multiple of 4 in the range 0-1020.
460 int64_t Value = CE->getValue();
461 return ((Value & 0x3) == 0 && Value <= 1020 && Value >= -1020);
463 bool isMemMode7() const {
465 getMemPreindexed() ||
466 getMemPostindexed() ||
467 getMemOffsetIsReg() ||
472 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
473 if (!CE) return false;
480 bool isMemModeRegThumb() const {
481 if (!isMemory() || !getMemOffsetIsReg() || getMemWriteback())
485 bool isMemModeImmThumb() const {
486 if (!isMemory() || getMemOffsetIsReg() || getMemWriteback())
489 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
490 if (!CE) return false;
492 // The offset must be a multiple of 4 in the range 0-124.
493 uint64_t Value = CE->getValue();
494 return ((Value & 0x3) == 0 && Value <= 124);
496 bool isMSRMask() const { return Kind == MSRMask; }
497 bool isProcIFlags() const { return Kind == ProcIFlags; }
499 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
500 // Add as immediates when possible. Null MCExpr = 0.
502 Inst.addOperand(MCOperand::CreateImm(0));
503 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
504 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
506 Inst.addOperand(MCOperand::CreateExpr(Expr));
509 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
510 assert(N == 2 && "Invalid number of operands!");
511 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
512 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
513 Inst.addOperand(MCOperand::CreateReg(RegNum));
516 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
517 assert(N == 1 && "Invalid number of operands!");
518 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
521 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
522 assert(N == 1 && "Invalid number of operands!");
523 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
526 void addCCOutOperands(MCInst &Inst, unsigned N) const {
527 assert(N == 1 && "Invalid number of operands!");
528 Inst.addOperand(MCOperand::CreateReg(getReg()));
531 void addRegOperands(MCInst &Inst, unsigned N) const {
532 assert(N == 1 && "Invalid number of operands!");
533 Inst.addOperand(MCOperand::CreateReg(getReg()));
536 void addShiftedRegOperands(MCInst &Inst, unsigned N) const {
537 assert(N == 3 && "Invalid number of operands!");
538 assert(isShiftedReg() && "addShiftedRegOperands() on non ShiftedReg!");
539 assert((ShiftedReg.ShiftReg == 0 ||
540 ARM_AM::getSORegOffset(ShiftedReg.ShiftImm) == 0) &&
541 "Invalid shifted register operand!");
542 Inst.addOperand(MCOperand::CreateReg(ShiftedReg.SrcReg));
543 Inst.addOperand(MCOperand::CreateReg(ShiftedReg.ShiftReg));
544 Inst.addOperand(MCOperand::CreateImm(
545 ARM_AM::getSORegOpc(ShiftedReg.ShiftTy, ShiftedReg.ShiftImm)));
548 void addShifterOperands(MCInst &Inst, unsigned N) const {
549 assert(N == 1 && "Invalid number of operands!");
550 Inst.addOperand(MCOperand::CreateImm(
551 ARM_AM::getSORegOpc(Shift.ShiftTy, 0)));
554 void addRegListOperands(MCInst &Inst, unsigned N) const {
555 assert(N == 1 && "Invalid number of operands!");
556 const SmallVectorImpl<unsigned> &RegList = getRegList();
557 for (SmallVectorImpl<unsigned>::const_iterator
558 I = RegList.begin(), E = RegList.end(); I != E; ++I)
559 Inst.addOperand(MCOperand::CreateReg(*I));
562 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
563 addRegListOperands(Inst, N);
566 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
567 addRegListOperands(Inst, N);
570 void addImmOperands(MCInst &Inst, unsigned N) const {
571 assert(N == 1 && "Invalid number of operands!");
572 addExpr(Inst, getImm());
575 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
576 assert(N == 1 && "Invalid number of operands!");
577 addExpr(Inst, getImm());
580 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
581 assert(N == 1 && "Invalid number of operands!");
582 addExpr(Inst, getImm());
585 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
586 assert(N == 1 && "Invalid number of operands!");
587 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
590 void addMemMode7Operands(MCInst &Inst, unsigned N) const {
591 assert(N == 1 && isMemMode7() && "Invalid number of operands!");
592 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
594 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
596 assert((CE || CE->getValue() == 0) &&
597 "No offset operand support in mode 7");
600 void addMemMode2Operands(MCInst &Inst, unsigned N) const {
601 assert(isMemMode2() && "Invalid mode or number of operands!");
602 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
603 unsigned IdxMode = (getMemPreindexed() | getMemPostindexed() << 1);
605 if (getMemOffsetIsReg()) {
606 Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
608 ARM_AM::AddrOpc AMOpc = getMemNegative() ? ARM_AM::sub : ARM_AM::add;
609 ARM_AM::ShiftOpc ShOpc = ARM_AM::no_shift;
610 int64_t ShiftAmount = 0;
612 if (getMemOffsetRegShifted()) {
613 ShOpc = getMemShiftType();
614 const MCConstantExpr *CE =
615 dyn_cast<MCConstantExpr>(getMemShiftAmount());
616 ShiftAmount = CE->getValue();
619 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM2Opc(AMOpc, ShiftAmount,
624 // Create a operand placeholder to always yield the same number of operands.
625 Inst.addOperand(MCOperand::CreateReg(0));
627 // FIXME: #-0 is encoded differently than #0. Does the parser preserve
629 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
630 assert(CE && "Non-constant mode 2 offset operand!");
631 int64_t Offset = CE->getValue();
634 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM2Opc(ARM_AM::add,
635 Offset, ARM_AM::no_shift, IdxMode)));
637 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM2Opc(ARM_AM::sub,
638 -Offset, ARM_AM::no_shift, IdxMode)));
641 void addMemMode3Operands(MCInst &Inst, unsigned N) const {
642 assert(isMemMode3() && "Invalid mode or number of operands!");
643 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
644 unsigned IdxMode = (getMemPreindexed() | getMemPostindexed() << 1);
646 if (getMemOffsetIsReg()) {
647 Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
649 ARM_AM::AddrOpc AMOpc = getMemNegative() ? ARM_AM::sub : ARM_AM::add;
650 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(AMOpc, 0,
655 // Create a operand placeholder to always yield the same number of operands.
656 Inst.addOperand(MCOperand::CreateReg(0));
658 // FIXME: #-0 is encoded differently than #0. Does the parser preserve
660 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
661 assert(CE && "Non-constant mode 3 offset operand!");
662 int64_t Offset = CE->getValue();
665 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(ARM_AM::add,
668 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(ARM_AM::sub,
672 void addMemMode5Operands(MCInst &Inst, unsigned N) const {
673 assert(N == 2 && isMemMode5() && "Invalid number of operands!");
675 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
676 assert(!getMemOffsetIsReg() && "Invalid mode 5 operand");
678 // FIXME: #-0 is encoded differently than #0. Does the parser preserve
680 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
681 assert(CE && "Non-constant mode 5 offset operand!");
683 // The MCInst offset operand doesn't include the low two bits (like
684 // the instruction encoding).
685 int64_t Offset = CE->getValue() / 4;
687 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add,
690 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub,
694 void addMemModeRegThumbOperands(MCInst &Inst, unsigned N) const {
695 assert(N == 2 && isMemModeRegThumb() && "Invalid number of operands!");
696 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
697 Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
700 void addMemModeImmThumbOperands(MCInst &Inst, unsigned N) const {
701 assert(N == 2 && isMemModeImmThumb() && "Invalid number of operands!");
702 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
703 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
704 assert(CE && "Non-constant mode offset operand!");
705 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
708 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
709 assert(N == 1 && "Invalid number of operands!");
710 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
713 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
714 assert(N == 1 && "Invalid number of operands!");
715 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
718 virtual void print(raw_ostream &OS) const;
720 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
721 ARMOperand *Op = new ARMOperand(CondCode);
728 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
729 ARMOperand *Op = new ARMOperand(CoprocNum);
730 Op->Cop.Val = CopVal;
736 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
737 ARMOperand *Op = new ARMOperand(CoprocReg);
738 Op->Cop.Val = CopVal;
744 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
745 ARMOperand *Op = new ARMOperand(CCOut);
746 Op->Reg.RegNum = RegNum;
752 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
753 ARMOperand *Op = new ARMOperand(Token);
754 Op->Tok.Data = Str.data();
755 Op->Tok.Length = Str.size();
761 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
762 ARMOperand *Op = new ARMOperand(Register);
763 Op->Reg.RegNum = RegNum;
769 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
774 ARMOperand *Op = new ARMOperand(ShiftedRegister);
775 Op->ShiftedReg.ShiftTy = ShTy;
776 Op->ShiftedReg.SrcReg = SrcReg;
777 Op->ShiftedReg.ShiftReg = ShiftReg;
778 Op->ShiftedReg.ShiftImm = ShiftImm;
784 static ARMOperand *CreateShifter(ARM_AM::ShiftOpc ShTy,
786 ARMOperand *Op = new ARMOperand(Shifter);
787 Op->Shift.ShiftTy = ShTy;
794 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
795 SMLoc StartLoc, SMLoc EndLoc) {
796 KindTy Kind = RegisterList;
798 if (ARM::DPRRegClass.contains(Regs.front().first))
799 Kind = DPRRegisterList;
800 else if (ARM::SPRRegClass.contains(Regs.front().first))
801 Kind = SPRRegisterList;
803 ARMOperand *Op = new ARMOperand(Kind);
804 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
805 I = Regs.begin(), E = Regs.end(); I != E; ++I)
806 Op->Registers.push_back(I->first);
807 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
808 Op->StartLoc = StartLoc;
813 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
814 ARMOperand *Op = new ARMOperand(Immediate);
821 static ARMOperand *CreateMem(ARMII::AddrMode AddrMode, unsigned BaseRegNum,
822 bool OffsetIsReg, const MCExpr *Offset,
823 int OffsetRegNum, bool OffsetRegShifted,
824 enum ARM_AM::ShiftOpc ShiftType,
825 const MCExpr *ShiftAmount, bool Preindexed,
826 bool Postindexed, bool Negative, bool Writeback,
828 assert((OffsetRegNum == -1 || OffsetIsReg) &&
829 "OffsetRegNum must imply OffsetIsReg!");
830 assert((!OffsetRegShifted || OffsetIsReg) &&
831 "OffsetRegShifted must imply OffsetIsReg!");
832 assert((Offset || OffsetIsReg) &&
833 "Offset must exists unless register offset is used!");
834 assert((!ShiftAmount || (OffsetIsReg && OffsetRegShifted)) &&
835 "Cannot have shift amount without shifted register offset!");
836 assert((!Offset || !OffsetIsReg) &&
837 "Cannot have expression offset and register offset!");
839 ARMOperand *Op = new ARMOperand(Memory);
840 Op->Mem.AddrMode = AddrMode;
841 Op->Mem.BaseRegNum = BaseRegNum;
842 Op->Mem.OffsetIsReg = OffsetIsReg;
844 Op->Mem.Offset.RegNum = OffsetRegNum;
846 Op->Mem.Offset.Value = Offset;
847 Op->Mem.OffsetRegShifted = OffsetRegShifted;
848 Op->Mem.ShiftType = ShiftType;
849 Op->Mem.ShiftAmount = ShiftAmount;
850 Op->Mem.Preindexed = Preindexed;
851 Op->Mem.Postindexed = Postindexed;
852 Op->Mem.Negative = Negative;
853 Op->Mem.Writeback = Writeback;
860 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
861 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
868 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
869 ARMOperand *Op = new ARMOperand(ProcIFlags);
870 Op->IFlags.Val = IFlags;
876 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
877 ARMOperand *Op = new ARMOperand(MSRMask);
878 Op->MMask.Val = MMask;
885 } // end anonymous namespace.
887 void ARMOperand::print(raw_ostream &OS) const {
890 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
893 OS << "<ccout " << getReg() << ">";
896 OS << "<coprocessor number: " << getCoproc() << ">";
899 OS << "<coprocessor register: " << getCoproc() << ">";
902 OS << "<mask: " << getMSRMask() << ">";
908 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
912 << "am:" << ARMII::AddrModeToString(getMemAddrMode())
913 << " base:" << getMemBaseRegNum();
914 if (getMemOffsetIsReg()) {
915 OS << " offset:<register " << getMemOffsetRegNum();
916 if (getMemOffsetRegShifted()) {
917 OS << " offset-shift-type:" << getMemShiftType();
918 OS << " offset-shift-amount:" << *getMemShiftAmount();
921 OS << " offset:" << *getMemOffset();
923 if (getMemOffsetIsReg())
924 OS << " (offset-is-reg)";
925 if (getMemPreindexed())
926 OS << " (pre-indexed)";
927 if (getMemPostindexed())
928 OS << " (post-indexed)";
929 if (getMemNegative())
931 if (getMemWriteback())
932 OS << " (writeback)";
937 unsigned IFlags = getProcIFlags();
938 for (int i=2; i >= 0; --i)
939 if (IFlags & (1 << i))
940 OS << ARM_PROC::IFlagsToString(1 << i);
945 OS << "<register " << getReg() << ">";
948 OS << "<shifter " << ARM_AM::getShiftOpcStr(Shift.ShiftTy) << ">";
950 case ShiftedRegister:
953 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(ShiftedReg.ShiftImm))
954 << ", " << ShiftedReg.ShiftReg << ", "
955 << ARM_AM::getSORegOffset(ShiftedReg.ShiftImm)
959 case DPRRegisterList:
960 case SPRRegisterList: {
961 OS << "<register_list ";
963 const SmallVectorImpl<unsigned> &RegList = getRegList();
964 for (SmallVectorImpl<unsigned>::const_iterator
965 I = RegList.begin(), E = RegList.end(); I != E; ) {
967 if (++I < E) OS << ", ";
974 OS << "'" << getToken() << "'";
979 /// @name Auto-generated Match Functions
982 static unsigned MatchRegisterName(StringRef Name);
986 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
987 SMLoc &StartLoc, SMLoc &EndLoc) {
988 RegNo = TryParseRegister();
990 return (RegNo == (unsigned)-1);
993 /// Try to parse a register name. The token must be an Identifier when called,
994 /// and if it is a register name the token is eaten and the register number is
995 /// returned. Otherwise return -1.
997 int ARMAsmParser::TryParseRegister() {
998 const AsmToken &Tok = Parser.getTok();
999 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1001 // FIXME: Validate register for the current architecture; we have to do
1002 // validation later, so maybe there is no need for this here.
1003 std::string upperCase = Tok.getString().str();
1004 std::string lowerCase = LowercaseString(upperCase);
1005 unsigned RegNum = MatchRegisterName(lowerCase);
1007 RegNum = StringSwitch<unsigned>(lowerCase)
1008 .Case("r13", ARM::SP)
1009 .Case("r14", ARM::LR)
1010 .Case("r15", ARM::PC)
1011 .Case("ip", ARM::R12)
1014 if (!RegNum) return -1;
1016 Parser.Lex(); // Eat identifier token.
1020 /// Try to parse a register name. The token must be an Identifier when called,
1021 /// and if it is a register name the token is eaten and the register number is
1022 /// returned. Otherwise return -1.
1024 bool ARMAsmParser::TryParseShiftRegister(
1025 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1026 SMLoc S = Parser.getTok().getLoc();
1027 const AsmToken &Tok = Parser.getTok();
1028 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1030 std::string upperCase = Tok.getString().str();
1031 std::string lowerCase = LowercaseString(upperCase);
1032 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1033 .Case("lsl", ARM_AM::lsl)
1034 .Case("lsr", ARM_AM::lsr)
1035 .Case("asr", ARM_AM::asr)
1036 .Case("ror", ARM_AM::ror)
1037 .Case("rrx", ARM_AM::rrx)
1038 .Default(ARM_AM::no_shift);
1040 if (ShiftTy == ARM_AM::no_shift)
1043 Parser.Lex(); // Eat the operator.
1045 // The source register for the shift has already been added to the
1046 // operand list, so we need to pop it off and combine it into the shifted
1047 // register operand instead.
1048 ARMOperand *PrevOp = (ARMOperand*)Operands.pop_back_val();
1049 if (!PrevOp->isReg())
1050 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1051 int SrcReg = PrevOp->getReg();
1054 if (ShiftTy == ARM_AM::rrx) {
1055 // RRX Doesn't have an explicit shift amount. The encoder expects
1056 // the shift register to be the same as the source register. Seems odd,
1060 // Figure out if this is shifted by a constant or a register (for non-RRX).
1061 if (Parser.getTok().is(AsmToken::Hash)) {
1062 Parser.Lex(); // Eat hash.
1063 SMLoc ImmLoc = Parser.getTok().getLoc();
1064 const MCExpr *ShiftExpr = 0;
1065 if (getParser().ParseExpression(ShiftExpr))
1066 return Error(ImmLoc, "invalid immediate shift value");
1067 // The expression must be evaluatable as an immediate.
1068 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1070 return Error(ImmLoc, "invalid immediate shift value");
1071 // Range check the immediate.
1072 // lsl, ror: 0 <= imm <= 31
1073 // lsr, asr: 0 <= imm <= 32
1074 Imm = CE->getValue();
1076 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1077 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1078 return Error(ImmLoc, "immediate shift value out of range");
1080 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1081 ShiftReg = TryParseRegister();
1082 SMLoc L = Parser.getTok().getLoc();
1084 return Error (L, "expected immediate or register in shift operand");
1086 return Error (Parser.getTok().getLoc(),
1087 "expected immediate or register in shift operand");
1091 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1093 S, Parser.getTok().getLoc()));
1099 /// Try to parse a register name. The token must be an Identifier when called.
1100 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1101 /// if there is a "writeback". 'true' if it's not a register.
1103 /// TODO this is likely to change to allow different register types and or to
1104 /// parse for a specific register type.
1106 TryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1107 SMLoc S = Parser.getTok().getLoc();
1108 int RegNo = TryParseRegister();
1112 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1114 const AsmToken &ExclaimTok = Parser.getTok();
1115 if (ExclaimTok.is(AsmToken::Exclaim)) {
1116 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1117 ExclaimTok.getLoc()));
1118 Parser.Lex(); // Eat exclaim token
1124 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1125 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1127 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1128 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1130 switch (Name.size()) {
1133 if (Name[0] != CoprocOp)
1150 if (Name[0] != CoprocOp || Name[1] != '1')
1154 case '0': return 10;
1155 case '1': return 11;
1156 case '2': return 12;
1157 case '3': return 13;
1158 case '4': return 14;
1159 case '5': return 15;
1167 /// tryParseCoprocNumOperand - Try to parse an coprocessor number operand. The
1168 /// token must be an Identifier when called, and if it is a coprocessor
1169 /// number, the token is eaten and the operand is added to the operand list.
1170 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1171 tryParseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1172 SMLoc S = Parser.getTok().getLoc();
1173 const AsmToken &Tok = Parser.getTok();
1174 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1176 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1178 return MatchOperand_NoMatch;
1180 Parser.Lex(); // Eat identifier token.
1181 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1182 return MatchOperand_Success;
1185 /// tryParseCoprocRegOperand - Try to parse an coprocessor register operand. The
1186 /// token must be an Identifier when called, and if it is a coprocessor
1187 /// number, the token is eaten and the operand is added to the operand list.
1188 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1189 tryParseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1190 SMLoc S = Parser.getTok().getLoc();
1191 const AsmToken &Tok = Parser.getTok();
1192 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1194 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1196 return MatchOperand_NoMatch;
1198 Parser.Lex(); // Eat identifier token.
1199 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1200 return MatchOperand_Success;
1203 /// Parse a register list, return it if successful else return null. The first
1204 /// token must be a '{' when called.
1206 ParseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1207 assert(Parser.getTok().is(AsmToken::LCurly) &&
1208 "Token is not a Left Curly Brace");
1209 SMLoc S = Parser.getTok().getLoc();
1211 // Read the rest of the registers in the list.
1212 unsigned PrevRegNum = 0;
1213 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1216 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1217 Parser.Lex(); // Eat non-identifier token.
1219 const AsmToken &RegTok = Parser.getTok();
1220 SMLoc RegLoc = RegTok.getLoc();
1221 if (RegTok.isNot(AsmToken::Identifier)) {
1222 Error(RegLoc, "register expected");
1226 int RegNum = TryParseRegister();
1228 Error(RegLoc, "register expected");
1233 int Reg = PrevRegNum;
1236 Registers.push_back(std::make_pair(Reg, RegLoc));
1237 } while (Reg != RegNum);
1239 Registers.push_back(std::make_pair(RegNum, RegLoc));
1242 PrevRegNum = RegNum;
1243 } while (Parser.getTok().is(AsmToken::Comma) ||
1244 Parser.getTok().is(AsmToken::Minus));
1246 // Process the right curly brace of the list.
1247 const AsmToken &RCurlyTok = Parser.getTok();
1248 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1249 Error(RCurlyTok.getLoc(), "'}' expected");
1253 SMLoc E = RCurlyTok.getLoc();
1254 Parser.Lex(); // Eat right curly brace token.
1256 // Verify the register list.
1257 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1258 RI = Registers.begin(), RE = Registers.end();
1260 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1261 bool EmittedWarning = false;
1263 DenseMap<unsigned, bool> RegMap;
1264 RegMap[HighRegNum] = true;
1266 for (++RI; RI != RE; ++RI) {
1267 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1268 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1271 Error(RegInfo.second, "register duplicated in register list");
1275 if (!EmittedWarning && Reg < HighRegNum)
1276 Warning(RegInfo.second,
1277 "register not in ascending order in register list");
1280 HighRegNum = std::max(Reg, HighRegNum);
1283 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1287 /// tryParseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1288 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1289 tryParseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1290 SMLoc S = Parser.getTok().getLoc();
1291 const AsmToken &Tok = Parser.getTok();
1292 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1293 StringRef OptStr = Tok.getString();
1295 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1296 .Case("sy", ARM_MB::SY)
1297 .Case("st", ARM_MB::ST)
1298 .Case("ish", ARM_MB::ISH)
1299 .Case("ishst", ARM_MB::ISHST)
1300 .Case("nsh", ARM_MB::NSH)
1301 .Case("nshst", ARM_MB::NSHST)
1302 .Case("osh", ARM_MB::OSH)
1303 .Case("oshst", ARM_MB::OSHST)
1307 return MatchOperand_NoMatch;
1309 Parser.Lex(); // Eat identifier token.
1310 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1311 return MatchOperand_Success;
1314 /// tryParseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1315 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1316 tryParseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1317 SMLoc S = Parser.getTok().getLoc();
1318 const AsmToken &Tok = Parser.getTok();
1319 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1320 StringRef IFlagsStr = Tok.getString();
1322 unsigned IFlags = 0;
1323 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1324 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1325 .Case("a", ARM_PROC::A)
1326 .Case("i", ARM_PROC::I)
1327 .Case("f", ARM_PROC::F)
1330 // If some specific iflag is already set, it means that some letter is
1331 // present more than once, this is not acceptable.
1332 if (Flag == ~0U || (IFlags & Flag))
1333 return MatchOperand_NoMatch;
1338 Parser.Lex(); // Eat identifier token.
1339 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1340 return MatchOperand_Success;
1343 /// tryParseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1344 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1345 tryParseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1346 SMLoc S = Parser.getTok().getLoc();
1347 const AsmToken &Tok = Parser.getTok();
1348 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1349 StringRef Mask = Tok.getString();
1351 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1352 size_t Start = 0, Next = Mask.find('_');
1353 StringRef Flags = "";
1354 StringRef SpecReg = Mask.slice(Start, Next);
1355 if (Next != StringRef::npos)
1356 Flags = Mask.slice(Next+1, Mask.size());
1358 // FlagsVal contains the complete mask:
1360 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1361 unsigned FlagsVal = 0;
1363 if (SpecReg == "apsr") {
1364 FlagsVal = StringSwitch<unsigned>(Flags)
1365 .Case("nzcvq", 0x8) // same as CPSR_c
1366 .Case("g", 0x4) // same as CPSR_s
1367 .Case("nzcvqg", 0xc) // same as CPSR_fs
1370 if (FlagsVal == ~0U) {
1372 return MatchOperand_NoMatch;
1374 FlagsVal = 0; // No flag
1376 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1377 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1379 for (int i = 0, e = Flags.size(); i != e; ++i) {
1380 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1387 // If some specific flag is already set, it means that some letter is
1388 // present more than once, this is not acceptable.
1389 if (FlagsVal == ~0U || (FlagsVal & Flag))
1390 return MatchOperand_NoMatch;
1393 } else // No match for special register.
1394 return MatchOperand_NoMatch;
1396 // Special register without flags are equivalent to "fc" flags.
1400 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1401 if (SpecReg == "spsr")
1404 Parser.Lex(); // Eat identifier token.
1405 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1406 return MatchOperand_Success;
1409 /// tryParseMemMode2Operand - Try to parse memory addressing mode 2 operand.
1410 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1411 tryParseMemMode2Operand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1412 assert(Parser.getTok().is(AsmToken::LBrac) && "Token is not a \"[\"");
1414 if (ParseMemory(Operands, ARMII::AddrMode2))
1415 return MatchOperand_NoMatch;
1417 return MatchOperand_Success;
1420 /// tryParseMemMode3Operand - Try to parse memory addressing mode 3 operand.
1421 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1422 tryParseMemMode3Operand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1423 assert(Parser.getTok().is(AsmToken::LBrac) && "Token is not a \"[\"");
1425 if (ParseMemory(Operands, ARMII::AddrMode3))
1426 return MatchOperand_NoMatch;
1428 return MatchOperand_Success;
1431 /// CvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1432 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1433 /// when they refer multiple MIOperands inside a single one.
1435 CvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1436 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1437 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1439 // Create a writeback register dummy placeholder.
1440 Inst.addOperand(MCOperand::CreateImm(0));
1442 ((ARMOperand*)Operands[3])->addMemMode2Operands(Inst, 3);
1443 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1447 /// CvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1448 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1449 /// when they refer multiple MIOperands inside a single one.
1451 CvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1452 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1453 // Create a writeback register dummy placeholder.
1454 Inst.addOperand(MCOperand::CreateImm(0));
1455 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1456 ((ARMOperand*)Operands[3])->addMemMode2Operands(Inst, 3);
1457 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1461 /// CvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
1462 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1463 /// when they refer multiple MIOperands inside a single one.
1465 CvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
1466 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1467 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1469 // Create a writeback register dummy placeholder.
1470 Inst.addOperand(MCOperand::CreateImm(0));
1472 ((ARMOperand*)Operands[3])->addMemMode3Operands(Inst, 3);
1473 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1477 /// CvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
1478 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1479 /// when they refer multiple MIOperands inside a single one.
1481 CvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
1482 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1483 // Create a writeback register dummy placeholder.
1484 Inst.addOperand(MCOperand::CreateImm(0));
1485 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1486 ((ARMOperand*)Operands[3])->addMemMode3Operands(Inst, 3);
1487 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1491 /// Parse an ARM memory expression, return false if successful else return true
1492 /// or an error. The first token must be a '[' when called.
1494 /// TODO Only preindexing and postindexing addressing are started, unindexed
1495 /// with option, etc are still to do.
1497 ParseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
1498 ARMII::AddrMode AddrMode = ARMII::AddrModeNone) {
1500 assert(Parser.getTok().is(AsmToken::LBrac) &&
1501 "Token is not a Left Bracket");
1502 S = Parser.getTok().getLoc();
1503 Parser.Lex(); // Eat left bracket token.
1505 const AsmToken &BaseRegTok = Parser.getTok();
1506 if (BaseRegTok.isNot(AsmToken::Identifier)) {
1507 Error(BaseRegTok.getLoc(), "register expected");
1510 int BaseRegNum = TryParseRegister();
1511 if (BaseRegNum == -1) {
1512 Error(BaseRegTok.getLoc(), "register expected");
1516 // The next token must either be a comma or a closing bracket.
1517 const AsmToken &Tok = Parser.getTok();
1518 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
1521 bool Preindexed = false;
1522 bool Postindexed = false;
1523 bool OffsetIsReg = false;
1524 bool Negative = false;
1525 bool Writeback = false;
1526 ARMOperand *WBOp = 0;
1527 int OffsetRegNum = -1;
1528 bool OffsetRegShifted = false;
1529 enum ARM_AM::ShiftOpc ShiftType = ARM_AM::lsl;
1530 const MCExpr *ShiftAmount = 0;
1531 const MCExpr *Offset = 0;
1533 // First look for preindexed address forms, that is after the "[Rn" we now
1534 // have to see if the next token is a comma.
1535 if (Tok.is(AsmToken::Comma)) {
1537 Parser.Lex(); // Eat comma token.
1539 if (ParseMemoryOffsetReg(Negative, OffsetRegShifted, ShiftType, ShiftAmount,
1540 Offset, OffsetIsReg, OffsetRegNum, E))
1542 const AsmToken &RBracTok = Parser.getTok();
1543 if (RBracTok.isNot(AsmToken::RBrac)) {
1544 Error(RBracTok.getLoc(), "']' expected");
1547 E = RBracTok.getLoc();
1548 Parser.Lex(); // Eat right bracket token.
1550 const AsmToken &ExclaimTok = Parser.getTok();
1551 if (ExclaimTok.is(AsmToken::Exclaim)) {
1552 // None of addrmode3 instruction uses "!"
1553 if (AddrMode == ARMII::AddrMode3)
1556 WBOp = ARMOperand::CreateToken(ExclaimTok.getString(),
1557 ExclaimTok.getLoc());
1559 Parser.Lex(); // Eat exclaim token
1560 } else { // In addressing mode 2, pre-indexed mode always end with "!"
1561 if (AddrMode == ARMII::AddrMode2)
1565 // The "[Rn" we have so far was not followed by a comma.
1567 // If there's anything other than the right brace, this is a post indexing
1570 Parser.Lex(); // Eat right bracket token.
1572 const AsmToken &NextTok = Parser.getTok();
1574 if (NextTok.isNot(AsmToken::EndOfStatement)) {
1578 if (NextTok.isNot(AsmToken::Comma)) {
1579 Error(NextTok.getLoc(), "',' expected");
1583 Parser.Lex(); // Eat comma token.
1585 if (ParseMemoryOffsetReg(Negative, OffsetRegShifted, ShiftType,
1586 ShiftAmount, Offset, OffsetIsReg, OffsetRegNum,
1592 // Force Offset to exist if used.
1595 Offset = MCConstantExpr::Create(0, getContext());
1597 if (AddrMode == ARMII::AddrMode3 && OffsetRegShifted) {
1598 Error(E, "shift amount not supported");
1603 Operands.push_back(ARMOperand::CreateMem(AddrMode, BaseRegNum, OffsetIsReg,
1604 Offset, OffsetRegNum, OffsetRegShifted,
1605 ShiftType, ShiftAmount, Preindexed,
1606 Postindexed, Negative, Writeback, S, E));
1608 Operands.push_back(WBOp);
1613 /// Parse the offset of a memory operand after we have seen "[Rn," or "[Rn],"
1614 /// we will parse the following (were +/- means that a plus or minus is
1619 /// we return false on success or an error otherwise.
1620 bool ARMAsmParser::ParseMemoryOffsetReg(bool &Negative,
1621 bool &OffsetRegShifted,
1622 enum ARM_AM::ShiftOpc &ShiftType,
1623 const MCExpr *&ShiftAmount,
1624 const MCExpr *&Offset,
1629 OffsetRegShifted = false;
1630 OffsetIsReg = false;
1632 const AsmToken &NextTok = Parser.getTok();
1633 E = NextTok.getLoc();
1634 if (NextTok.is(AsmToken::Plus))
1635 Parser.Lex(); // Eat plus token.
1636 else if (NextTok.is(AsmToken::Minus)) {
1638 Parser.Lex(); // Eat minus token
1640 // See if there is a register following the "[Rn," or "[Rn]," we have so far.
1641 const AsmToken &OffsetRegTok = Parser.getTok();
1642 if (OffsetRegTok.is(AsmToken::Identifier)) {
1643 SMLoc CurLoc = OffsetRegTok.getLoc();
1644 OffsetRegNum = TryParseRegister();
1645 if (OffsetRegNum != -1) {
1651 // If we parsed a register as the offset then there can be a shift after that.
1652 if (OffsetRegNum != -1) {
1653 // Look for a comma then a shift
1654 const AsmToken &Tok = Parser.getTok();
1655 if (Tok.is(AsmToken::Comma)) {
1656 Parser.Lex(); // Eat comma token.
1658 const AsmToken &Tok = Parser.getTok();
1659 if (ParseShift(ShiftType, ShiftAmount, E))
1660 return Error(Tok.getLoc(), "shift expected");
1661 OffsetRegShifted = true;
1664 else { // the "[Rn," or "[Rn,]" we have so far was not followed by "Rm"
1665 // Look for #offset following the "[Rn," or "[Rn],"
1666 const AsmToken &HashTok = Parser.getTok();
1667 if (HashTok.isNot(AsmToken::Hash))
1668 return Error(HashTok.getLoc(), "'#' expected");
1670 Parser.Lex(); // Eat hash token.
1672 if (getParser().ParseExpression(Offset))
1674 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
1679 /// ParseShift as one of these two:
1680 /// ( lsl | lsr | asr | ror ) , # shift_amount
1682 /// and returns true if it parses a shift otherwise it returns false.
1683 bool ARMAsmParser::ParseShift(ARM_AM::ShiftOpc &St,
1684 const MCExpr *&ShiftAmount, SMLoc &E) {
1685 const AsmToken &Tok = Parser.getTok();
1686 if (Tok.isNot(AsmToken::Identifier))
1688 StringRef ShiftName = Tok.getString();
1689 if (ShiftName == "lsl" || ShiftName == "LSL")
1691 else if (ShiftName == "lsr" || ShiftName == "LSR")
1693 else if (ShiftName == "asr" || ShiftName == "ASR")
1695 else if (ShiftName == "ror" || ShiftName == "ROR")
1697 else if (ShiftName == "rrx" || ShiftName == "RRX")
1701 Parser.Lex(); // Eat shift type token.
1703 // Rrx stands alone.
1704 if (St == ARM_AM::rrx)
1707 // Otherwise, there must be a '#' and a shift amount.
1708 const AsmToken &HashTok = Parser.getTok();
1709 if (HashTok.isNot(AsmToken::Hash))
1710 return Error(HashTok.getLoc(), "'#' expected");
1711 Parser.Lex(); // Eat hash token.
1713 if (getParser().ParseExpression(ShiftAmount))
1719 /// Parse a arm instruction operand. For now this parses the operand regardless
1720 /// of the mnemonic.
1721 bool ARMAsmParser::ParseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
1722 StringRef Mnemonic) {
1725 // Check if the current operand has a custom associated parser, if so, try to
1726 // custom parse the operand, or fallback to the general approach.
1727 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
1728 if (ResTy == MatchOperand_Success)
1730 // If there wasn't a custom match, try the generic matcher below. Otherwise,
1731 // there was a match, but an error occurred, in which case, just return that
1732 // the operand parsing failed.
1733 if (ResTy == MatchOperand_ParseFail)
1736 switch (getLexer().getKind()) {
1738 Error(Parser.getTok().getLoc(), "unexpected token in operand");
1740 case AsmToken::Identifier:
1741 if (!TryParseRegisterWithWriteBack(Operands))
1743 if (!TryParseShiftRegister(Operands))
1747 // Fall though for the Identifier case that is not a register or a
1749 case AsmToken::Integer: // things like 1f and 2b as a branch targets
1750 case AsmToken::Dot: { // . as a branch target
1751 // This was not a register so parse other operands that start with an
1752 // identifier (like labels) as expressions and create them as immediates.
1753 const MCExpr *IdVal;
1754 S = Parser.getTok().getLoc();
1755 if (getParser().ParseExpression(IdVal))
1757 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
1758 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
1761 case AsmToken::LBrac:
1762 return ParseMemory(Operands);
1763 case AsmToken::LCurly:
1764 return ParseRegisterList(Operands);
1765 case AsmToken::Hash:
1766 // #42 -> immediate.
1767 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
1768 S = Parser.getTok().getLoc();
1770 const MCExpr *ImmVal;
1771 if (getParser().ParseExpression(ImmVal))
1773 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
1774 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
1776 case AsmToken::Colon: {
1777 // ":lower16:" and ":upper16:" expression prefixes
1778 // FIXME: Check it's an expression prefix,
1779 // e.g. (FOO - :lower16:BAR) isn't legal.
1780 ARMMCExpr::VariantKind RefKind;
1781 if (ParsePrefix(RefKind))
1784 const MCExpr *SubExprVal;
1785 if (getParser().ParseExpression(SubExprVal))
1788 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
1790 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
1791 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
1797 // ParsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
1798 // :lower16: and :upper16:.
1799 bool ARMAsmParser::ParsePrefix(ARMMCExpr::VariantKind &RefKind) {
1800 RefKind = ARMMCExpr::VK_ARM_None;
1802 // :lower16: and :upper16: modifiers
1803 assert(getLexer().is(AsmToken::Colon) && "expected a :");
1804 Parser.Lex(); // Eat ':'
1806 if (getLexer().isNot(AsmToken::Identifier)) {
1807 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
1811 StringRef IDVal = Parser.getTok().getIdentifier();
1812 if (IDVal == "lower16") {
1813 RefKind = ARMMCExpr::VK_ARM_LO16;
1814 } else if (IDVal == "upper16") {
1815 RefKind = ARMMCExpr::VK_ARM_HI16;
1817 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
1822 if (getLexer().isNot(AsmToken::Colon)) {
1823 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
1826 Parser.Lex(); // Eat the last ':'
1831 ARMAsmParser::ApplyPrefixToExpr(const MCExpr *E,
1832 MCSymbolRefExpr::VariantKind Variant) {
1833 // Recurse over the given expression, rebuilding it to apply the given variant
1834 // to the leftmost symbol.
1835 if (Variant == MCSymbolRefExpr::VK_None)
1838 switch (E->getKind()) {
1839 case MCExpr::Target:
1840 llvm_unreachable("Can't handle target expr yet");
1841 case MCExpr::Constant:
1842 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
1844 case MCExpr::SymbolRef: {
1845 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
1847 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
1850 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
1854 llvm_unreachable("Can't handle unary expressions yet");
1856 case MCExpr::Binary: {
1857 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
1858 const MCExpr *LHS = ApplyPrefixToExpr(BE->getLHS(), Variant);
1859 const MCExpr *RHS = BE->getRHS();
1863 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
1867 assert(0 && "Invalid expression kind!");
1871 /// \brief Given a mnemonic, split out possible predication code and carry
1872 /// setting letters to form a canonical mnemonic and flags.
1874 // FIXME: Would be nice to autogen this.
1875 static StringRef SplitMnemonic(StringRef Mnemonic,
1876 unsigned &PredicationCode,
1878 unsigned &ProcessorIMod) {
1879 PredicationCode = ARMCC::AL;
1880 CarrySetting = false;
1883 // Ignore some mnemonics we know aren't predicated forms.
1885 // FIXME: Would be nice to autogen this.
1886 if (Mnemonic == "teq" || Mnemonic == "vceq" ||
1887 Mnemonic == "movs" ||
1888 Mnemonic == "svc" ||
1889 (Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
1890 Mnemonic == "vmls" || Mnemonic == "vnmls") ||
1891 Mnemonic == "vacge" || Mnemonic == "vcge" ||
1892 Mnemonic == "vclt" ||
1893 Mnemonic == "vacgt" || Mnemonic == "vcgt" ||
1894 Mnemonic == "vcle" ||
1895 (Mnemonic == "smlal" || Mnemonic == "umaal" || Mnemonic == "umlal" ||
1896 Mnemonic == "vabal" || Mnemonic == "vmlal" || Mnemonic == "vpadal" ||
1897 Mnemonic == "vqdmlal" || Mnemonic == "bics"))
1900 // First, split out any predication code. Ignore mnemonics we know aren't
1901 // predicated but do have a carry-set and so weren't caught above.
1902 if (Mnemonic != "adcs") {
1903 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
1904 .Case("eq", ARMCC::EQ)
1905 .Case("ne", ARMCC::NE)
1906 .Case("hs", ARMCC::HS)
1907 .Case("cs", ARMCC::HS)
1908 .Case("lo", ARMCC::LO)
1909 .Case("cc", ARMCC::LO)
1910 .Case("mi", ARMCC::MI)
1911 .Case("pl", ARMCC::PL)
1912 .Case("vs", ARMCC::VS)
1913 .Case("vc", ARMCC::VC)
1914 .Case("hi", ARMCC::HI)
1915 .Case("ls", ARMCC::LS)
1916 .Case("ge", ARMCC::GE)
1917 .Case("lt", ARMCC::LT)
1918 .Case("gt", ARMCC::GT)
1919 .Case("le", ARMCC::LE)
1920 .Case("al", ARMCC::AL)
1923 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
1924 PredicationCode = CC;
1928 // Next, determine if we have a carry setting bit. We explicitly ignore all
1929 // the instructions we know end in 's'.
1930 if (Mnemonic.endswith("s") &&
1931 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
1932 Mnemonic == "movs" || Mnemonic == "mrs" || Mnemonic == "smmls" ||
1933 Mnemonic == "vabs" || Mnemonic == "vcls" || Mnemonic == "vmls" ||
1934 Mnemonic == "vmrs" || Mnemonic == "vnmls" || Mnemonic == "vqabs" ||
1935 Mnemonic == "vrecps" || Mnemonic == "vrsqrts")) {
1936 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
1937 CarrySetting = true;
1940 // The "cps" instruction can have a interrupt mode operand which is glued into
1941 // the mnemonic. Check if this is the case, split it and parse the imod op
1942 if (Mnemonic.startswith("cps")) {
1943 // Split out any imod code.
1945 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
1946 .Case("ie", ARM_PROC::IE)
1947 .Case("id", ARM_PROC::ID)
1950 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
1951 ProcessorIMod = IMod;
1958 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
1959 /// inclusion of carry set or predication code operands.
1961 // FIXME: It would be nice to autogen this.
1963 GetMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
1964 bool &CanAcceptPredicationCode) {
1965 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
1966 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
1967 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
1968 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
1969 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
1970 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
1971 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
1972 Mnemonic == "eor" || Mnemonic == "smlal" ||
1973 (Mnemonic == "mov" && !isThumbOne())) {
1974 CanAcceptCarrySet = true;
1976 CanAcceptCarrySet = false;
1979 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
1980 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
1981 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
1982 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
1983 Mnemonic == "dsb" || Mnemonic == "movs" || Mnemonic == "isb" ||
1984 Mnemonic == "clrex" || Mnemonic.startswith("cps")) {
1985 CanAcceptPredicationCode = false;
1987 CanAcceptPredicationCode = true;
1991 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
1992 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
1993 CanAcceptPredicationCode = false;
1996 /// Parse an arm instruction mnemonic followed by its operands.
1997 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
1998 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1999 // Create the leading tokens for the mnemonic, split by '.' characters.
2000 size_t Start = 0, Next = Name.find('.');
2001 StringRef Head = Name.slice(Start, Next);
2003 // Split out the predication code and carry setting flag from the mnemonic.
2004 unsigned PredicationCode;
2005 unsigned ProcessorIMod;
2007 Head = SplitMnemonic(Head, PredicationCode, CarrySetting,
2010 Operands.push_back(ARMOperand::CreateToken(Head, NameLoc));
2012 // Next, add the CCOut and ConditionCode operands, if needed.
2014 // For mnemonics which can ever incorporate a carry setting bit or predication
2015 // code, our matching model involves us always generating CCOut and
2016 // ConditionCode operands to match the mnemonic "as written" and then we let
2017 // the matcher deal with finding the right instruction or generating an
2018 // appropriate error.
2019 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2020 GetMnemonicAcceptInfo(Head, CanAcceptCarrySet, CanAcceptPredicationCode);
2022 // Add the carry setting operand, if necessary.
2024 // FIXME: It would be awesome if we could somehow invent a location such that
2025 // match errors on this operand would print a nice diagnostic about how the
2026 // 's' character in the mnemonic resulted in a CCOut operand.
2027 if (CanAcceptCarrySet) {
2028 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2031 // This mnemonic can't ever accept a carry set, but the user wrote one (or
2032 // misspelled another mnemonic).
2034 // FIXME: Issue a nice error.
2037 // Add the predication code operand, if necessary.
2038 if (CanAcceptPredicationCode) {
2039 Operands.push_back(ARMOperand::CreateCondCode(
2040 ARMCC::CondCodes(PredicationCode), NameLoc));
2042 // This mnemonic can't ever accept a predication code, but the user wrote
2043 // one (or misspelled another mnemonic).
2045 // FIXME: Issue a nice error.
2048 // Add the processor imod operand, if necessary.
2049 if (ProcessorIMod) {
2050 Operands.push_back(ARMOperand::CreateImm(
2051 MCConstantExpr::Create(ProcessorIMod, getContext()),
2054 // This mnemonic can't ever accept a imod, but the user wrote
2055 // one (or misspelled another mnemonic).
2057 // FIXME: Issue a nice error.
2060 // Add the remaining tokens in the mnemonic.
2061 while (Next != StringRef::npos) {
2063 Next = Name.find('.', Start + 1);
2064 StringRef ExtraToken = Name.slice(Start, Next);
2066 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2069 // Read the remaining operands.
2070 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2071 // Read the first operand.
2072 if (ParseOperand(Operands, Head)) {
2073 Parser.EatToEndOfStatement();
2077 while (getLexer().is(AsmToken::Comma)) {
2078 Parser.Lex(); // Eat the comma.
2080 // Parse and remember the operand.
2081 if (ParseOperand(Operands, Head)) {
2082 Parser.EatToEndOfStatement();
2088 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2089 Parser.EatToEndOfStatement();
2090 return TokError("unexpected token in argument list");
2093 Parser.Lex(); // Consume the EndOfStatement
2098 MatchAndEmitInstruction(SMLoc IDLoc,
2099 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2103 MatchResultTy MatchResult, MatchResult2;
2104 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2105 if (MatchResult != Match_Success) {
2106 // If we get a Match_InvalidOperand it might be some arithmetic instruction
2107 // that does not update the condition codes. So try adding a CCOut operand
2108 // with a value of reg0.
2109 if (MatchResult == Match_InvalidOperand) {
2110 Operands.insert(Operands.begin() + 1,
2111 ARMOperand::CreateCCOut(0,
2112 ((ARMOperand*)Operands[0])->getStartLoc()));
2113 MatchResult2 = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2114 if (MatchResult2 == Match_Success)
2115 MatchResult = Match_Success;
2117 ARMOperand *CCOut = ((ARMOperand*)Operands[1]);
2118 Operands.erase(Operands.begin() + 1);
2122 // If we get a Match_MnemonicFail it might be some arithmetic instruction
2123 // that updates the condition codes if it ends in 's'. So see if the
2124 // mnemonic ends in 's' and if so try removing the 's' and adding a CCOut
2125 // operand with a value of CPSR.
2126 else if (MatchResult == Match_MnemonicFail) {
2127 // Get the instruction mnemonic, which is the first token.
2128 StringRef Mnemonic = ((ARMOperand*)Operands[0])->getToken();
2129 if (Mnemonic.substr(Mnemonic.size()-1) == "s") {
2130 // removed the 's' from the mnemonic for matching.
2131 StringRef MnemonicNoS = Mnemonic.slice(0, Mnemonic.size() - 1);
2132 SMLoc NameLoc = ((ARMOperand*)Operands[0])->getStartLoc();
2133 ARMOperand *OldMnemonic = ((ARMOperand*)Operands[0]);
2134 Operands.erase(Operands.begin());
2136 Operands.insert(Operands.begin(),
2137 ARMOperand::CreateToken(MnemonicNoS, NameLoc));
2138 Operands.insert(Operands.begin() + 1,
2139 ARMOperand::CreateCCOut(ARM::CPSR, NameLoc));
2140 MatchResult2 = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2141 if (MatchResult2 == Match_Success)
2142 MatchResult = Match_Success;
2144 ARMOperand *OldMnemonic = ((ARMOperand*)Operands[0]);
2145 Operands.erase(Operands.begin());
2147 Operands.insert(Operands.begin(),
2148 ARMOperand::CreateToken(Mnemonic, NameLoc));
2149 ARMOperand *CCOut = ((ARMOperand*)Operands[1]);
2150 Operands.erase(Operands.begin() + 1);
2156 switch (MatchResult) {
2158 Out.EmitInstruction(Inst);
2160 case Match_MissingFeature:
2161 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2163 case Match_InvalidOperand: {
2164 SMLoc ErrorLoc = IDLoc;
2165 if (ErrorInfo != ~0U) {
2166 if (ErrorInfo >= Operands.size())
2167 return Error(IDLoc, "too few operands for instruction");
2169 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2170 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2173 return Error(ErrorLoc, "invalid operand for instruction");
2175 case Match_MnemonicFail:
2176 return Error(IDLoc, "unrecognized instruction mnemonic");
2177 case Match_ConversionFail:
2178 return Error(IDLoc, "unable to convert operands to instruction");
2181 llvm_unreachable("Implement any new match types added!");
2185 /// ParseDirective parses the arm specific directives
2186 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2187 StringRef IDVal = DirectiveID.getIdentifier();
2188 if (IDVal == ".word")
2189 return ParseDirectiveWord(4, DirectiveID.getLoc());
2190 else if (IDVal == ".thumb")
2191 return ParseDirectiveThumb(DirectiveID.getLoc());
2192 else if (IDVal == ".thumb_func")
2193 return ParseDirectiveThumbFunc(DirectiveID.getLoc());
2194 else if (IDVal == ".code")
2195 return ParseDirectiveCode(DirectiveID.getLoc());
2196 else if (IDVal == ".syntax")
2197 return ParseDirectiveSyntax(DirectiveID.getLoc());
2201 /// ParseDirectiveWord
2202 /// ::= .word [ expression (, expression)* ]
2203 bool ARMAsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
2204 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2206 const MCExpr *Value;
2207 if (getParser().ParseExpression(Value))
2210 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2212 if (getLexer().is(AsmToken::EndOfStatement))
2215 // FIXME: Improve diagnostic.
2216 if (getLexer().isNot(AsmToken::Comma))
2217 return Error(L, "unexpected token in directive");
2226 /// ParseDirectiveThumb
2228 bool ARMAsmParser::ParseDirectiveThumb(SMLoc L) {
2229 if (getLexer().isNot(AsmToken::EndOfStatement))
2230 return Error(L, "unexpected token in directive");
2233 // TODO: set thumb mode
2234 // TODO: tell the MC streamer the mode
2235 // getParser().getStreamer().Emit???();
2239 /// ParseDirectiveThumbFunc
2240 /// ::= .thumbfunc symbol_name
2241 bool ARMAsmParser::ParseDirectiveThumbFunc(SMLoc L) {
2242 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
2243 bool isMachO = MAI.hasSubsectionsViaSymbols();
2246 // Darwin asm has function name after .thumb_func direction
2249 const AsmToken &Tok = Parser.getTok();
2250 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
2251 return Error(L, "unexpected token in .thumb_func directive");
2252 Name = Tok.getString();
2253 Parser.Lex(); // Consume the identifier token.
2256 if (getLexer().isNot(AsmToken::EndOfStatement))
2257 return Error(L, "unexpected token in directive");
2260 // FIXME: assuming function name will be the line following .thumb_func
2262 Name = Parser.getTok().getString();
2265 // Mark symbol as a thumb symbol.
2266 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
2267 getParser().getStreamer().EmitThumbFunc(Func);
2271 /// ParseDirectiveSyntax
2272 /// ::= .syntax unified | divided
2273 bool ARMAsmParser::ParseDirectiveSyntax(SMLoc L) {
2274 const AsmToken &Tok = Parser.getTok();
2275 if (Tok.isNot(AsmToken::Identifier))
2276 return Error(L, "unexpected token in .syntax directive");
2277 StringRef Mode = Tok.getString();
2278 if (Mode == "unified" || Mode == "UNIFIED")
2280 else if (Mode == "divided" || Mode == "DIVIDED")
2281 return Error(L, "'.syntax divided' arm asssembly not supported");
2283 return Error(L, "unrecognized syntax mode in .syntax directive");
2285 if (getLexer().isNot(AsmToken::EndOfStatement))
2286 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2289 // TODO tell the MC streamer the mode
2290 // getParser().getStreamer().Emit???();
2294 /// ParseDirectiveCode
2295 /// ::= .code 16 | 32
2296 bool ARMAsmParser::ParseDirectiveCode(SMLoc L) {
2297 const AsmToken &Tok = Parser.getTok();
2298 if (Tok.isNot(AsmToken::Integer))
2299 return Error(L, "unexpected token in .code directive");
2300 int64_t Val = Parser.getTok().getIntVal();
2306 return Error(L, "invalid operand to .code directive");
2308 if (getLexer().isNot(AsmToken::EndOfStatement))
2309 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2315 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
2319 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
2325 extern "C" void LLVMInitializeARMAsmLexer();
2327 /// Force static initialization.
2328 extern "C" void LLVMInitializeARMAsmParser() {
2329 RegisterAsmParser<ARMAsmParser> X(TheARMTarget);
2330 RegisterAsmParser<ARMAsmParser> Y(TheThumbTarget);
2331 LLVMInitializeARMAsmLexer();
2334 #define GET_REGISTER_MATCHER
2335 #define GET_MATCHER_IMPLEMENTATION
2336 #include "ARMGenAsmMatcher.inc"