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 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/ARMBaseInfo.h"
11 #include "MCTargetDesc/ARMAddressingModes.h"
12 #include "MCTargetDesc/ARMMCExpr.h"
13 #include "llvm/MC/MCParser/MCAsmLexer.h"
14 #include "llvm/MC/MCParser/MCAsmParser.h"
15 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
16 #include "llvm/MC/MCAsmInfo.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCStreamer.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/MC/MCTargetAsmParser.h"
24 #include "llvm/Target/TargetRegistry.h"
25 #include "llvm/Support/SourceMgr.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include "llvm/ADT/OwningPtr.h"
28 #include "llvm/ADT/STLExtras.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 MCTargetAsmParser {
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 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
52 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
53 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
54 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
55 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
56 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
57 const MCExpr *applyPrefixToExpr(const MCExpr *E,
58 MCSymbolRefExpr::VariantKind Variant);
61 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
62 unsigned &ShiftAmount);
63 bool parseDirectiveWord(unsigned Size, SMLoc L);
64 bool parseDirectiveThumb(SMLoc L);
65 bool parseDirectiveThumbFunc(SMLoc L);
66 bool parseDirectiveCode(SMLoc L);
67 bool parseDirectiveSyntax(SMLoc L);
69 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
70 bool &CarrySetting, unsigned &ProcessorIMod);
71 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
72 bool &CanAcceptPredicationCode);
74 bool isThumb() const {
75 // FIXME: Can tablegen auto-generate this?
76 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
78 bool isThumbOne() const {
79 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
82 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
83 setAvailableFeatures(FB);
86 /// @name Auto-generated Match Functions
89 #define GET_ASSEMBLER_HEADER
90 #include "ARMGenAsmMatcher.inc"
94 OperandMatchResultTy parseCoprocNumOperand(
95 SmallVectorImpl<MCParsedAsmOperand*>&);
96 OperandMatchResultTy parseCoprocRegOperand(
97 SmallVectorImpl<MCParsedAsmOperand*>&);
98 OperandMatchResultTy parseMemBarrierOptOperand(
99 SmallVectorImpl<MCParsedAsmOperand*>&);
100 OperandMatchResultTy parseProcIFlagsOperand(
101 SmallVectorImpl<MCParsedAsmOperand*>&);
102 OperandMatchResultTy parseMSRMaskOperand(
103 SmallVectorImpl<MCParsedAsmOperand*>&);
104 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
105 StringRef Op, int Low, int High);
106 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
107 return parsePKHImm(O, "lsl", 0, 31);
109 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
110 return parsePKHImm(O, "asr", 1, 32);
112 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
113 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
114 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
115 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
116 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
118 // Asm Match Converter Methods
119 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
120 const SmallVectorImpl<MCParsedAsmOperand*> &);
121 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
122 const SmallVectorImpl<MCParsedAsmOperand*> &);
123 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
124 const SmallVectorImpl<MCParsedAsmOperand*> &);
125 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
126 const SmallVectorImpl<MCParsedAsmOperand*> &);
127 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
128 const SmallVectorImpl<MCParsedAsmOperand*> &);
129 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
130 const SmallVectorImpl<MCParsedAsmOperand*> &);
132 bool validateInstruction(MCInst &Inst,
133 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
136 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
137 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
138 MCAsmParserExtension::Initialize(_Parser);
140 // Initialize the set of available features.
141 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
144 // Implementation of the MCTargetAsmParser interface:
145 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
146 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
147 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
148 bool ParseDirective(AsmToken DirectiveID);
150 bool MatchAndEmitInstruction(SMLoc IDLoc,
151 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
154 } // end anonymous namespace
158 /// ARMOperand - Instances of this class represent a parsed ARM machine
160 class ARMOperand : public MCParsedAsmOperand {
184 SMLoc StartLoc, EndLoc;
185 SmallVector<unsigned, 8> Registers;
189 ARMCC::CondCodes Val;
201 ARM_PROC::IFlags Val;
221 /// Combined record for all forms of ARM address expressions.
224 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
226 const MCConstantExpr *OffsetImm; // Offset immediate value
227 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
228 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
229 unsigned ShiftValue; // shift for OffsetReg.
230 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
243 ARM_AM::ShiftOpc ShiftTy;
249 ARM_AM::ShiftOpc ShiftTy;
262 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
264 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
266 StartLoc = o.StartLoc;
280 case DPRRegisterList:
281 case SPRRegisterList:
282 Registers = o.Registers;
297 case PostIndexRegister:
298 PostIdxReg = o.PostIdxReg;
306 case ShifterImmediate:
307 ShifterImm = o.ShifterImm;
309 case ShiftedRegister:
310 RegShiftedReg = o.RegShiftedReg;
312 case ShiftedImmediate:
313 RegShiftedImm = o.RegShiftedImm;
315 case RotateImmediate:
318 case BitfieldDescriptor:
319 Bitfield = o.Bitfield;
324 /// getStartLoc - Get the location of the first token of this operand.
325 SMLoc getStartLoc() const { return StartLoc; }
326 /// getEndLoc - Get the location of the last token of this operand.
327 SMLoc getEndLoc() const { return EndLoc; }
329 ARMCC::CondCodes getCondCode() const {
330 assert(Kind == CondCode && "Invalid access!");
334 unsigned getCoproc() const {
335 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
339 StringRef getToken() const {
340 assert(Kind == Token && "Invalid access!");
341 return StringRef(Tok.Data, Tok.Length);
344 unsigned getReg() const {
345 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
349 const SmallVectorImpl<unsigned> &getRegList() const {
350 assert((Kind == RegisterList || Kind == DPRRegisterList ||
351 Kind == SPRRegisterList) && "Invalid access!");
355 const MCExpr *getImm() const {
356 assert(Kind == Immediate && "Invalid access!");
360 ARM_MB::MemBOpt getMemBarrierOpt() const {
361 assert(Kind == MemBarrierOpt && "Invalid access!");
365 ARM_PROC::IFlags getProcIFlags() const {
366 assert(Kind == ProcIFlags && "Invalid access!");
370 unsigned getMSRMask() const {
371 assert(Kind == MSRMask && "Invalid access!");
375 bool isCoprocNum() const { return Kind == CoprocNum; }
376 bool isCoprocReg() const { return Kind == CoprocReg; }
377 bool isCondCode() const { return Kind == CondCode; }
378 bool isCCOut() const { return Kind == CCOut; }
379 bool isImm() const { return Kind == Immediate; }
380 bool isImm0_255() const {
381 if (Kind != Immediate)
383 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
384 if (!CE) return false;
385 int64_t Value = CE->getValue();
386 return Value >= 0 && Value < 256;
388 bool isImm0_7() const {
389 if (Kind != Immediate)
391 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
392 if (!CE) return false;
393 int64_t Value = CE->getValue();
394 return Value >= 0 && Value < 8;
396 bool isImm0_15() const {
397 if (Kind != Immediate)
399 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
400 if (!CE) return false;
401 int64_t Value = CE->getValue();
402 return Value >= 0 && Value < 16;
404 bool isImm0_31() const {
405 if (Kind != Immediate)
407 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
408 if (!CE) return false;
409 int64_t Value = CE->getValue();
410 return Value >= 0 && Value < 32;
412 bool isImm1_16() const {
413 if (Kind != Immediate)
415 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
416 if (!CE) return false;
417 int64_t Value = CE->getValue();
418 return Value > 0 && Value < 17;
420 bool isImm1_32() const {
421 if (Kind != Immediate)
423 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
424 if (!CE) return false;
425 int64_t Value = CE->getValue();
426 return Value > 0 && Value < 33;
428 bool isImm0_65535() const {
429 if (Kind != Immediate)
431 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
432 if (!CE) return false;
433 int64_t Value = CE->getValue();
434 return Value >= 0 && Value < 65536;
436 bool isImm0_65535Expr() const {
437 if (Kind != Immediate)
439 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
440 // If it's not a constant expression, it'll generate a fixup and be
442 if (!CE) return true;
443 int64_t Value = CE->getValue();
444 return Value >= 0 && Value < 65536;
446 bool isImm24bit() const {
447 if (Kind != Immediate)
449 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
450 if (!CE) return false;
451 int64_t Value = CE->getValue();
452 return Value >= 0 && Value <= 0xffffff;
454 bool isPKHLSLImm() const {
455 if (Kind != Immediate)
457 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
458 if (!CE) return false;
459 int64_t Value = CE->getValue();
460 return Value >= 0 && Value < 32;
462 bool isPKHASRImm() const {
463 if (Kind != Immediate)
465 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
466 if (!CE) return false;
467 int64_t Value = CE->getValue();
468 return Value > 0 && Value <= 32;
470 bool isARMSOImm() const {
471 if (Kind != Immediate)
473 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
474 if (!CE) return false;
475 int64_t Value = CE->getValue();
476 return ARM_AM::getSOImmVal(Value) != -1;
478 bool isT2SOImm() const {
479 if (Kind != Immediate)
481 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
482 if (!CE) return false;
483 int64_t Value = CE->getValue();
484 return ARM_AM::getT2SOImmVal(Value) != -1;
486 bool isSetEndImm() const {
487 if (Kind != Immediate)
489 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
490 if (!CE) return false;
491 int64_t Value = CE->getValue();
492 return Value == 1 || Value == 0;
494 bool isReg() const { return Kind == Register; }
495 bool isRegList() const { return Kind == RegisterList; }
496 bool isDPRRegList() const { return Kind == DPRRegisterList; }
497 bool isSPRRegList() const { return Kind == SPRRegisterList; }
498 bool isToken() const { return Kind == Token; }
499 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
500 bool isMemory() const { return Kind == Memory; }
501 bool isPostIdxReg() const { return Kind == PostIndexRegister; }
502 bool isShifterImm() const { return Kind == ShifterImmediate; }
503 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
504 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
505 bool isRotImm() const { return Kind == RotateImmediate; }
506 bool isBitfield() const { return Kind == BitfieldDescriptor; }
507 bool isMemNoOffset() const {
510 // No offset of any kind.
511 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
513 bool isAddrMode2() const {
516 // Check for register offset.
517 if (Mem.OffsetRegNum) return true;
518 // Immediate offset in range [-4095, 4095].
519 if (!Mem.OffsetImm) return true;
520 int64_t Val = Mem.OffsetImm->getValue();
521 return Val > -4096 && Val < 4096;
523 bool isAddrMode5() const {
526 // Check for register offset.
527 if (Mem.OffsetRegNum) return false;
528 // Immediate offset in range [-1020, 1020] and a multiple of 4.
529 if (!Mem.OffsetImm) return true;
530 int64_t Val = Mem.OffsetImm->getValue();
531 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
533 bool isMemRegOffset() const {
534 if (Kind != Memory || !Mem.OffsetRegNum)
538 bool isMemThumbRR() const {
539 // Thumb reg+reg addressing is simple. Just two registers, a base and
540 // an offset. No shifts, negations or any other complicating factors.
541 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
542 Mem.ShiftType != ARM_AM::no_shift)
546 bool isMemImm8Offset() const {
547 if (Kind != Memory || Mem.OffsetRegNum != 0)
549 // Immediate offset in range [-255, 255].
550 if (!Mem.OffsetImm) return true;
551 int64_t Val = Mem.OffsetImm->getValue();
552 return Val > -256 && Val < 256;
554 bool isMemImm12Offset() const {
555 if (Kind != Memory || Mem.OffsetRegNum != 0)
557 // Immediate offset in range [-4095, 4095].
558 if (!Mem.OffsetImm) return true;
559 int64_t Val = Mem.OffsetImm->getValue();
560 return Val > -4096 && Val < 4096;
562 bool isPostIdxImm8() const {
563 if (Kind != Immediate)
565 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
566 if (!CE) return false;
567 int64_t Val = CE->getValue();
568 return Val > -256 && Val < 256;
571 bool isMSRMask() const { return Kind == MSRMask; }
572 bool isProcIFlags() const { return Kind == ProcIFlags; }
574 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
575 // Add as immediates when possible. Null MCExpr = 0.
577 Inst.addOperand(MCOperand::CreateImm(0));
578 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
579 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
581 Inst.addOperand(MCOperand::CreateExpr(Expr));
584 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
585 assert(N == 2 && "Invalid number of operands!");
586 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
587 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
588 Inst.addOperand(MCOperand::CreateReg(RegNum));
591 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
592 assert(N == 1 && "Invalid number of operands!");
593 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
596 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
597 assert(N == 1 && "Invalid number of operands!");
598 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
601 void addCCOutOperands(MCInst &Inst, unsigned N) const {
602 assert(N == 1 && "Invalid number of operands!");
603 Inst.addOperand(MCOperand::CreateReg(getReg()));
606 void addRegOperands(MCInst &Inst, unsigned N) const {
607 assert(N == 1 && "Invalid number of operands!");
608 Inst.addOperand(MCOperand::CreateReg(getReg()));
611 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
612 assert(N == 3 && "Invalid number of operands!");
613 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
614 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
615 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
616 Inst.addOperand(MCOperand::CreateImm(
617 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
620 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
621 assert(N == 2 && "Invalid number of operands!");
622 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
623 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
624 Inst.addOperand(MCOperand::CreateImm(
625 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
629 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
630 assert(N == 1 && "Invalid number of operands!");
631 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
635 void addRegListOperands(MCInst &Inst, unsigned N) const {
636 assert(N == 1 && "Invalid number of operands!");
637 const SmallVectorImpl<unsigned> &RegList = getRegList();
638 for (SmallVectorImpl<unsigned>::const_iterator
639 I = RegList.begin(), E = RegList.end(); I != E; ++I)
640 Inst.addOperand(MCOperand::CreateReg(*I));
643 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
644 addRegListOperands(Inst, N);
647 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
648 addRegListOperands(Inst, N);
651 void addRotImmOperands(MCInst &Inst, unsigned N) const {
652 assert(N == 1 && "Invalid number of operands!");
653 // Encoded as val>>3. The printer handles display as 8, 16, 24.
654 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
657 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
658 assert(N == 1 && "Invalid number of operands!");
659 // Munge the lsb/width into a bitfield mask.
660 unsigned lsb = Bitfield.LSB;
661 unsigned width = Bitfield.Width;
662 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
663 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
664 (32 - (lsb + width)));
665 Inst.addOperand(MCOperand::CreateImm(Mask));
668 void addImmOperands(MCInst &Inst, unsigned N) const {
669 assert(N == 1 && "Invalid number of operands!");
670 addExpr(Inst, getImm());
673 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
674 assert(N == 1 && "Invalid number of operands!");
675 addExpr(Inst, getImm());
678 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
679 assert(N == 1 && "Invalid number of operands!");
680 addExpr(Inst, getImm());
683 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
684 assert(N == 1 && "Invalid number of operands!");
685 addExpr(Inst, getImm());
688 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
689 assert(N == 1 && "Invalid number of operands!");
690 addExpr(Inst, getImm());
693 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
694 assert(N == 1 && "Invalid number of operands!");
695 // The constant encodes as the immediate-1, and we store in the instruction
696 // the bits as encoded, so subtract off one here.
697 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
698 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
701 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
702 assert(N == 1 && "Invalid number of operands!");
703 // The constant encodes as the immediate-1, and we store in the instruction
704 // the bits as encoded, so subtract off one here.
705 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
706 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
709 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
710 assert(N == 1 && "Invalid number of operands!");
711 addExpr(Inst, getImm());
714 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
715 assert(N == 1 && "Invalid number of operands!");
716 addExpr(Inst, getImm());
719 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
720 assert(N == 1 && "Invalid number of operands!");
721 addExpr(Inst, getImm());
724 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
725 assert(N == 1 && "Invalid number of operands!");
726 addExpr(Inst, getImm());
729 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
730 assert(N == 1 && "Invalid number of operands!");
731 // An ASR value of 32 encodes as 0, so that's how we want to add it to
732 // the instruction as well.
733 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
734 int Val = CE->getValue();
735 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
738 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
739 assert(N == 1 && "Invalid number of operands!");
740 addExpr(Inst, getImm());
743 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
744 assert(N == 1 && "Invalid number of operands!");
745 addExpr(Inst, getImm());
748 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
749 assert(N == 1 && "Invalid number of operands!");
750 addExpr(Inst, getImm());
753 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
754 assert(N == 1 && "Invalid number of operands!");
755 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
758 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
759 assert(N == 1 && "Invalid number of operands!");
760 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
763 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
764 assert(N == 3 && "Invalid number of operands!");
765 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
766 if (!Mem.OffsetRegNum) {
767 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
768 // Special case for #-0
769 if (Val == INT32_MIN) Val = 0;
770 if (Val < 0) Val = -Val;
771 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
773 // For register offset, we encode the shift type and negation flag
775 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
778 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
779 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
780 Inst.addOperand(MCOperand::CreateImm(Val));
783 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
784 assert(N == 2 && "Invalid number of operands!");
785 // The lower two bits are always zero and as such are not encoded.
786 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
787 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
788 // Special case for #-0
789 if (Val == INT32_MIN) Val = 0;
790 if (Val < 0) Val = -Val;
791 Val = ARM_AM::getAM5Opc(AddSub, Val);
792 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
793 Inst.addOperand(MCOperand::CreateImm(Val));
796 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
797 assert(N == 2 && "Invalid number of operands!");
798 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
799 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
800 Inst.addOperand(MCOperand::CreateImm(Val));
803 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
804 assert(N == 2 && "Invalid number of operands!");
805 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
806 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
807 Inst.addOperand(MCOperand::CreateImm(Val));
810 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
811 assert(N == 3 && "Invalid number of operands!");
812 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
813 Mem.ShiftValue, Mem.ShiftType);
814 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
815 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
816 Inst.addOperand(MCOperand::CreateImm(Val));
819 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
820 assert(N == 2 && "Invalid number of operands!");
821 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
822 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
825 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
826 assert(N == 1 && "Invalid number of operands!");
827 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
828 assert(CE && "non-constant post-idx-imm8 operand!");
829 int Imm = CE->getValue();
830 bool isAdd = Imm >= 0;
831 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
832 Inst.addOperand(MCOperand::CreateImm(Imm));
835 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
836 assert(N == 2 && "Invalid number of operands!");
837 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
838 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.Imm));
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->RegShiftedReg.ShiftTy = ShTy;
909 Op->RegShiftedReg.SrcReg = SrcReg;
910 Op->RegShiftedReg.ShiftReg = ShiftReg;
911 Op->RegShiftedReg.ShiftImm = ShiftImm;
917 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
921 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
922 Op->RegShiftedImm.ShiftTy = ShTy;
923 Op->RegShiftedImm.SrcReg = SrcReg;
924 Op->RegShiftedImm.ShiftImm = ShiftImm;
930 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
932 ARMOperand *Op = new ARMOperand(ShifterImmediate);
933 Op->ShifterImm.isASR = isASR;
934 Op->ShifterImm.Imm = Imm;
940 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
941 ARMOperand *Op = new ARMOperand(RotateImmediate);
942 Op->RotImm.Imm = Imm;
948 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
950 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
951 Op->Bitfield.LSB = LSB;
952 Op->Bitfield.Width = Width;
959 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
960 SMLoc StartLoc, SMLoc EndLoc) {
961 KindTy Kind = RegisterList;
963 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
964 contains(Regs.front().first))
965 Kind = DPRRegisterList;
966 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
967 contains(Regs.front().first))
968 Kind = SPRRegisterList;
970 ARMOperand *Op = new ARMOperand(Kind);
971 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
972 I = Regs.begin(), E = Regs.end(); I != E; ++I)
973 Op->Registers.push_back(I->first);
974 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
975 Op->StartLoc = StartLoc;
980 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
981 ARMOperand *Op = new ARMOperand(Immediate);
988 static ARMOperand *CreateMem(unsigned BaseRegNum,
989 const MCConstantExpr *OffsetImm,
990 unsigned OffsetRegNum,
991 ARM_AM::ShiftOpc ShiftType,
995 ARMOperand *Op = new ARMOperand(Memory);
996 Op->Mem.BaseRegNum = BaseRegNum;
997 Op->Mem.OffsetImm = OffsetImm;
998 Op->Mem.OffsetRegNum = OffsetRegNum;
999 Op->Mem.ShiftType = ShiftType;
1000 Op->Mem.ShiftValue = ShiftValue;
1001 Op->Mem.isNegative = isNegative;
1007 static ARMOperand *CreatePostIdxReg(unsigned RegNum, unsigned Imm,
1009 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1010 Op->PostIdxReg.RegNum = RegNum;
1011 Op->PostIdxReg.Imm = Imm;
1017 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1018 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1019 Op->MBOpt.Val = Opt;
1025 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1026 ARMOperand *Op = new ARMOperand(ProcIFlags);
1027 Op->IFlags.Val = IFlags;
1033 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1034 ARMOperand *Op = new ARMOperand(MSRMask);
1035 Op->MMask.Val = MMask;
1042 } // end anonymous namespace.
1044 void ARMOperand::print(raw_ostream &OS) const {
1047 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1050 OS << "<ccout " << getReg() << ">";
1053 OS << "<coprocessor number: " << getCoproc() << ">";
1056 OS << "<coprocessor register: " << getCoproc() << ">";
1059 OS << "<mask: " << getMSRMask() << ">";
1062 getImm()->print(OS);
1065 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1069 << " base:" << Mem.BaseRegNum;
1072 case PostIndexRegister:
1073 OS << "post-idx register "
1074 << getAddrOpcStr(ARM_AM::getAM3Op(PostIdxReg.Imm))
1075 << PostIdxReg.RegNum
1079 OS << "<ARM_PROC::";
1080 unsigned IFlags = getProcIFlags();
1081 for (int i=2; i >= 0; --i)
1082 if (IFlags & (1 << i))
1083 OS << ARM_PROC::IFlagsToString(1 << i);
1088 OS << "<register " << getReg() << ">";
1090 case ShifterImmediate:
1091 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1092 << " #" << ShifterImm.Imm << ">";
1094 case ShiftedRegister:
1095 OS << "<so_reg_reg "
1096 << RegShiftedReg.SrcReg
1097 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1098 << ", " << RegShiftedReg.ShiftReg << ", "
1099 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1102 case ShiftedImmediate:
1103 OS << "<so_reg_imm "
1104 << RegShiftedImm.SrcReg
1105 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1106 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1109 case RotateImmediate:
1110 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1112 case BitfieldDescriptor:
1113 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1114 << ", width: " << Bitfield.Width << ">";
1117 case DPRRegisterList:
1118 case SPRRegisterList: {
1119 OS << "<register_list ";
1121 const SmallVectorImpl<unsigned> &RegList = getRegList();
1122 for (SmallVectorImpl<unsigned>::const_iterator
1123 I = RegList.begin(), E = RegList.end(); I != E; ) {
1125 if (++I < E) OS << ", ";
1132 OS << "'" << getToken() << "'";
1137 /// @name Auto-generated Match Functions
1140 static unsigned MatchRegisterName(StringRef Name);
1144 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1145 SMLoc &StartLoc, SMLoc &EndLoc) {
1146 RegNo = tryParseRegister();
1148 return (RegNo == (unsigned)-1);
1151 /// Try to parse a register name. The token must be an Identifier when called,
1152 /// and if it is a register name the token is eaten and the register number is
1153 /// returned. Otherwise return -1.
1155 int ARMAsmParser::tryParseRegister() {
1156 const AsmToken &Tok = Parser.getTok();
1157 if (Tok.isNot(AsmToken::Identifier)) return -1;
1159 // FIXME: Validate register for the current architecture; we have to do
1160 // validation later, so maybe there is no need for this here.
1161 std::string upperCase = Tok.getString().str();
1162 std::string lowerCase = LowercaseString(upperCase);
1163 unsigned RegNum = MatchRegisterName(lowerCase);
1165 RegNum = StringSwitch<unsigned>(lowerCase)
1166 .Case("r13", ARM::SP)
1167 .Case("r14", ARM::LR)
1168 .Case("r15", ARM::PC)
1169 .Case("ip", ARM::R12)
1172 if (!RegNum) return -1;
1174 Parser.Lex(); // Eat identifier token.
1178 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1179 // If a recoverable error occurs, return 1. If an irrecoverable error
1180 // occurs, return -1. An irrecoverable error is one where tokens have been
1181 // consumed in the process of trying to parse the shifter (i.e., when it is
1182 // indeed a shifter operand, but malformed).
1183 int ARMAsmParser::tryParseShiftRegister(
1184 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1185 SMLoc S = Parser.getTok().getLoc();
1186 const AsmToken &Tok = Parser.getTok();
1187 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1189 std::string upperCase = Tok.getString().str();
1190 std::string lowerCase = LowercaseString(upperCase);
1191 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1192 .Case("lsl", ARM_AM::lsl)
1193 .Case("lsr", ARM_AM::lsr)
1194 .Case("asr", ARM_AM::asr)
1195 .Case("ror", ARM_AM::ror)
1196 .Case("rrx", ARM_AM::rrx)
1197 .Default(ARM_AM::no_shift);
1199 if (ShiftTy == ARM_AM::no_shift)
1202 Parser.Lex(); // Eat the operator.
1204 // The source register for the shift has already been added to the
1205 // operand list, so we need to pop it off and combine it into the shifted
1206 // register operand instead.
1207 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1208 if (!PrevOp->isReg())
1209 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1210 int SrcReg = PrevOp->getReg();
1213 if (ShiftTy == ARM_AM::rrx) {
1214 // RRX Doesn't have an explicit shift amount. The encoder expects
1215 // the shift register to be the same as the source register. Seems odd,
1219 // Figure out if this is shifted by a constant or a register (for non-RRX).
1220 if (Parser.getTok().is(AsmToken::Hash)) {
1221 Parser.Lex(); // Eat hash.
1222 SMLoc ImmLoc = Parser.getTok().getLoc();
1223 const MCExpr *ShiftExpr = 0;
1224 if (getParser().ParseExpression(ShiftExpr)) {
1225 Error(ImmLoc, "invalid immediate shift value");
1228 // The expression must be evaluatable as an immediate.
1229 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1231 Error(ImmLoc, "invalid immediate shift value");
1234 // Range check the immediate.
1235 // lsl, ror: 0 <= imm <= 31
1236 // lsr, asr: 0 <= imm <= 32
1237 Imm = CE->getValue();
1239 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1240 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1241 Error(ImmLoc, "immediate shift value out of range");
1244 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1245 ShiftReg = tryParseRegister();
1246 SMLoc L = Parser.getTok().getLoc();
1247 if (ShiftReg == -1) {
1248 Error (L, "expected immediate or register in shift operand");
1252 Error (Parser.getTok().getLoc(),
1253 "expected immediate or register in shift operand");
1258 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1259 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1261 S, Parser.getTok().getLoc()));
1263 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1264 S, Parser.getTok().getLoc()));
1270 /// Try to parse a register name. The token must be an Identifier when called.
1271 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1272 /// if there is a "writeback". 'true' if it's not a register.
1274 /// TODO this is likely to change to allow different register types and or to
1275 /// parse for a specific register type.
1277 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1278 SMLoc S = Parser.getTok().getLoc();
1279 int RegNo = tryParseRegister();
1283 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1285 const AsmToken &ExclaimTok = Parser.getTok();
1286 if (ExclaimTok.is(AsmToken::Exclaim)) {
1287 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1288 ExclaimTok.getLoc()));
1289 Parser.Lex(); // Eat exclaim token
1295 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1296 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1298 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1299 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1301 switch (Name.size()) {
1304 if (Name[0] != CoprocOp)
1321 if (Name[0] != CoprocOp || Name[1] != '1')
1325 case '0': return 10;
1326 case '1': return 11;
1327 case '2': return 12;
1328 case '3': return 13;
1329 case '4': return 14;
1330 case '5': return 15;
1338 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1339 /// token must be an Identifier when called, and if it is a coprocessor
1340 /// number, the token is eaten and the operand is added to the operand list.
1341 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1342 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1343 SMLoc S = Parser.getTok().getLoc();
1344 const AsmToken &Tok = Parser.getTok();
1345 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1347 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1349 return MatchOperand_NoMatch;
1351 Parser.Lex(); // Eat identifier token.
1352 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1353 return MatchOperand_Success;
1356 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1357 /// token must be an Identifier when called, and if it is a coprocessor
1358 /// number, the token is eaten and the operand is added to the operand list.
1359 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1360 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1361 SMLoc S = Parser.getTok().getLoc();
1362 const AsmToken &Tok = Parser.getTok();
1363 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1365 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1367 return MatchOperand_NoMatch;
1369 Parser.Lex(); // Eat identifier token.
1370 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1371 return MatchOperand_Success;
1374 /// Parse a register list, return it if successful else return null. The first
1375 /// token must be a '{' when called.
1377 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1378 assert(Parser.getTok().is(AsmToken::LCurly) &&
1379 "Token is not a Left Curly Brace");
1380 SMLoc S = Parser.getTok().getLoc();
1382 // Read the rest of the registers in the list.
1383 unsigned PrevRegNum = 0;
1384 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1387 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1388 Parser.Lex(); // Eat non-identifier token.
1390 const AsmToken &RegTok = Parser.getTok();
1391 SMLoc RegLoc = RegTok.getLoc();
1392 if (RegTok.isNot(AsmToken::Identifier)) {
1393 Error(RegLoc, "register expected");
1397 int RegNum = tryParseRegister();
1399 Error(RegLoc, "register expected");
1404 int Reg = PrevRegNum;
1407 Registers.push_back(std::make_pair(Reg, RegLoc));
1408 } while (Reg != RegNum);
1410 Registers.push_back(std::make_pair(RegNum, RegLoc));
1413 PrevRegNum = RegNum;
1414 } while (Parser.getTok().is(AsmToken::Comma) ||
1415 Parser.getTok().is(AsmToken::Minus));
1417 // Process the right curly brace of the list.
1418 const AsmToken &RCurlyTok = Parser.getTok();
1419 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1420 Error(RCurlyTok.getLoc(), "'}' expected");
1424 SMLoc E = RCurlyTok.getLoc();
1425 Parser.Lex(); // Eat right curly brace token.
1427 // Verify the register list.
1428 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1429 RI = Registers.begin(), RE = Registers.end();
1431 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1432 bool EmittedWarning = false;
1434 DenseMap<unsigned, bool> RegMap;
1435 RegMap[HighRegNum] = true;
1437 for (++RI; RI != RE; ++RI) {
1438 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1439 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1442 Error(RegInfo.second, "register duplicated in register list");
1446 if (!EmittedWarning && Reg < HighRegNum)
1447 Warning(RegInfo.second,
1448 "register not in ascending order in register list");
1451 HighRegNum = std::max(Reg, HighRegNum);
1454 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1458 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1459 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1460 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1461 SMLoc S = Parser.getTok().getLoc();
1462 const AsmToken &Tok = Parser.getTok();
1463 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1464 StringRef OptStr = Tok.getString();
1466 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1467 .Case("sy", ARM_MB::SY)
1468 .Case("st", ARM_MB::ST)
1469 .Case("sh", ARM_MB::ISH)
1470 .Case("ish", ARM_MB::ISH)
1471 .Case("shst", ARM_MB::ISHST)
1472 .Case("ishst", ARM_MB::ISHST)
1473 .Case("nsh", ARM_MB::NSH)
1474 .Case("un", ARM_MB::NSH)
1475 .Case("nshst", ARM_MB::NSHST)
1476 .Case("unst", ARM_MB::NSHST)
1477 .Case("osh", ARM_MB::OSH)
1478 .Case("oshst", ARM_MB::OSHST)
1482 return MatchOperand_NoMatch;
1484 Parser.Lex(); // Eat identifier token.
1485 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1486 return MatchOperand_Success;
1489 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1490 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1491 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1492 SMLoc S = Parser.getTok().getLoc();
1493 const AsmToken &Tok = Parser.getTok();
1494 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1495 StringRef IFlagsStr = Tok.getString();
1497 unsigned IFlags = 0;
1498 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1499 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1500 .Case("a", ARM_PROC::A)
1501 .Case("i", ARM_PROC::I)
1502 .Case("f", ARM_PROC::F)
1505 // If some specific iflag is already set, it means that some letter is
1506 // present more than once, this is not acceptable.
1507 if (Flag == ~0U || (IFlags & Flag))
1508 return MatchOperand_NoMatch;
1513 Parser.Lex(); // Eat identifier token.
1514 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1515 return MatchOperand_Success;
1518 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1519 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1520 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1521 SMLoc S = Parser.getTok().getLoc();
1522 const AsmToken &Tok = Parser.getTok();
1523 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1524 StringRef Mask = Tok.getString();
1526 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1527 size_t Start = 0, Next = Mask.find('_');
1528 StringRef Flags = "";
1529 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1530 if (Next != StringRef::npos)
1531 Flags = Mask.slice(Next+1, Mask.size());
1533 // FlagsVal contains the complete mask:
1535 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1536 unsigned FlagsVal = 0;
1538 if (SpecReg == "apsr") {
1539 FlagsVal = StringSwitch<unsigned>(Flags)
1540 .Case("nzcvq", 0x8) // same as CPSR_f
1541 .Case("g", 0x4) // same as CPSR_s
1542 .Case("nzcvqg", 0xc) // same as CPSR_fs
1545 if (FlagsVal == ~0U) {
1547 return MatchOperand_NoMatch;
1549 FlagsVal = 0; // No flag
1551 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1552 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1554 for (int i = 0, e = Flags.size(); i != e; ++i) {
1555 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1562 // If some specific flag is already set, it means that some letter is
1563 // present more than once, this is not acceptable.
1564 if (FlagsVal == ~0U || (FlagsVal & Flag))
1565 return MatchOperand_NoMatch;
1568 } else // No match for special register.
1569 return MatchOperand_NoMatch;
1571 // Special register without flags are equivalent to "fc" flags.
1575 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1576 if (SpecReg == "spsr")
1579 Parser.Lex(); // Eat identifier token.
1580 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1581 return MatchOperand_Success;
1584 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1585 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1586 int Low, int High) {
1587 const AsmToken &Tok = Parser.getTok();
1588 if (Tok.isNot(AsmToken::Identifier)) {
1589 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1590 return MatchOperand_ParseFail;
1592 StringRef ShiftName = Tok.getString();
1593 std::string LowerOp = LowercaseString(Op);
1594 std::string UpperOp = UppercaseString(Op);
1595 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1596 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1597 return MatchOperand_ParseFail;
1599 Parser.Lex(); // Eat shift type token.
1601 // There must be a '#' and a shift amount.
1602 if (Parser.getTok().isNot(AsmToken::Hash)) {
1603 Error(Parser.getTok().getLoc(), "'#' expected");
1604 return MatchOperand_ParseFail;
1606 Parser.Lex(); // Eat hash token.
1608 const MCExpr *ShiftAmount;
1609 SMLoc Loc = Parser.getTok().getLoc();
1610 if (getParser().ParseExpression(ShiftAmount)) {
1611 Error(Loc, "illegal expression");
1612 return MatchOperand_ParseFail;
1614 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1616 Error(Loc, "constant expression expected");
1617 return MatchOperand_ParseFail;
1619 int Val = CE->getValue();
1620 if (Val < Low || Val > High) {
1621 Error(Loc, "immediate value out of range");
1622 return MatchOperand_ParseFail;
1625 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1627 return MatchOperand_Success;
1630 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1631 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1632 const AsmToken &Tok = Parser.getTok();
1633 SMLoc S = Tok.getLoc();
1634 if (Tok.isNot(AsmToken::Identifier)) {
1635 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1636 return MatchOperand_ParseFail;
1638 int Val = StringSwitch<int>(Tok.getString())
1642 Parser.Lex(); // Eat the token.
1645 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1646 return MatchOperand_ParseFail;
1648 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1650 S, Parser.getTok().getLoc()));
1651 return MatchOperand_Success;
1654 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1655 /// instructions. Legal values are:
1656 /// lsl #n 'n' in [0,31]
1657 /// asr #n 'n' in [1,32]
1658 /// n == 32 encoded as n == 0.
1659 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1660 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1661 const AsmToken &Tok = Parser.getTok();
1662 SMLoc S = Tok.getLoc();
1663 if (Tok.isNot(AsmToken::Identifier)) {
1664 Error(S, "shift operator 'asr' or 'lsl' expected");
1665 return MatchOperand_ParseFail;
1667 StringRef ShiftName = Tok.getString();
1669 if (ShiftName == "lsl" || ShiftName == "LSL")
1671 else if (ShiftName == "asr" || ShiftName == "ASR")
1674 Error(S, "shift operator 'asr' or 'lsl' expected");
1675 return MatchOperand_ParseFail;
1677 Parser.Lex(); // Eat the operator.
1679 // A '#' and a shift amount.
1680 if (Parser.getTok().isNot(AsmToken::Hash)) {
1681 Error(Parser.getTok().getLoc(), "'#' expected");
1682 return MatchOperand_ParseFail;
1684 Parser.Lex(); // Eat hash token.
1686 const MCExpr *ShiftAmount;
1687 SMLoc E = Parser.getTok().getLoc();
1688 if (getParser().ParseExpression(ShiftAmount)) {
1689 Error(E, "malformed shift expression");
1690 return MatchOperand_ParseFail;
1692 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1694 Error(E, "shift amount must be an immediate");
1695 return MatchOperand_ParseFail;
1698 int64_t Val = CE->getValue();
1700 // Shift amount must be in [1,32]
1701 if (Val < 1 || Val > 32) {
1702 Error(E, "'asr' shift amount must be in range [1,32]");
1703 return MatchOperand_ParseFail;
1705 // asr #32 encoded as asr #0.
1706 if (Val == 32) Val = 0;
1708 // Shift amount must be in [1,32]
1709 if (Val < 0 || Val > 31) {
1710 Error(E, "'lsr' shift amount must be in range [0,31]");
1711 return MatchOperand_ParseFail;
1715 E = Parser.getTok().getLoc();
1716 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1718 return MatchOperand_Success;
1721 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1722 /// of instructions. Legal values are:
1723 /// ror #n 'n' in {0, 8, 16, 24}
1724 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1725 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1726 const AsmToken &Tok = Parser.getTok();
1727 SMLoc S = Tok.getLoc();
1728 if (Tok.isNot(AsmToken::Identifier)) {
1729 Error(S, "rotate operator 'ror' expected");
1730 return MatchOperand_ParseFail;
1732 StringRef ShiftName = Tok.getString();
1733 if (ShiftName != "ror" && ShiftName != "ROR") {
1734 Error(S, "rotate operator 'ror' expected");
1735 return MatchOperand_ParseFail;
1737 Parser.Lex(); // Eat the operator.
1739 // A '#' and a rotate amount.
1740 if (Parser.getTok().isNot(AsmToken::Hash)) {
1741 Error(Parser.getTok().getLoc(), "'#' expected");
1742 return MatchOperand_ParseFail;
1744 Parser.Lex(); // Eat hash token.
1746 const MCExpr *ShiftAmount;
1747 SMLoc E = Parser.getTok().getLoc();
1748 if (getParser().ParseExpression(ShiftAmount)) {
1749 Error(E, "malformed rotate expression");
1750 return MatchOperand_ParseFail;
1752 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1754 Error(E, "rotate amount must be an immediate");
1755 return MatchOperand_ParseFail;
1758 int64_t Val = CE->getValue();
1759 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1760 // normally, zero is represented in asm by omitting the rotate operand
1762 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1763 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1764 return MatchOperand_ParseFail;
1767 E = Parser.getTok().getLoc();
1768 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1770 return MatchOperand_Success;
1773 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1774 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1775 SMLoc S = Parser.getTok().getLoc();
1776 // The bitfield descriptor is really two operands, the LSB and the width.
1777 if (Parser.getTok().isNot(AsmToken::Hash)) {
1778 Error(Parser.getTok().getLoc(), "'#' expected");
1779 return MatchOperand_ParseFail;
1781 Parser.Lex(); // Eat hash token.
1783 const MCExpr *LSBExpr;
1784 SMLoc E = Parser.getTok().getLoc();
1785 if (getParser().ParseExpression(LSBExpr)) {
1786 Error(E, "malformed immediate expression");
1787 return MatchOperand_ParseFail;
1789 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
1791 Error(E, "'lsb' operand must be an immediate");
1792 return MatchOperand_ParseFail;
1795 int64_t LSB = CE->getValue();
1796 // The LSB must be in the range [0,31]
1797 if (LSB < 0 || LSB > 31) {
1798 Error(E, "'lsb' operand must be in the range [0,31]");
1799 return MatchOperand_ParseFail;
1801 E = Parser.getTok().getLoc();
1803 // Expect another immediate operand.
1804 if (Parser.getTok().isNot(AsmToken::Comma)) {
1805 Error(Parser.getTok().getLoc(), "too few operands");
1806 return MatchOperand_ParseFail;
1808 Parser.Lex(); // Eat hash token.
1809 if (Parser.getTok().isNot(AsmToken::Hash)) {
1810 Error(Parser.getTok().getLoc(), "'#' expected");
1811 return MatchOperand_ParseFail;
1813 Parser.Lex(); // Eat hash token.
1815 const MCExpr *WidthExpr;
1816 if (getParser().ParseExpression(WidthExpr)) {
1817 Error(E, "malformed immediate expression");
1818 return MatchOperand_ParseFail;
1820 CE = dyn_cast<MCConstantExpr>(WidthExpr);
1822 Error(E, "'width' operand must be an immediate");
1823 return MatchOperand_ParseFail;
1826 int64_t Width = CE->getValue();
1827 // The LSB must be in the range [1,32-lsb]
1828 if (Width < 1 || Width > 32 - LSB) {
1829 Error(E, "'width' operand must be in the range [1,32-lsb]");
1830 return MatchOperand_ParseFail;
1832 E = Parser.getTok().getLoc();
1834 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
1836 return MatchOperand_Success;
1839 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1840 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1841 // Check for a post-index addressing register operand. Specifically:
1842 // postidx_reg := '+' register
1846 // This method must return MatchOperand_NoMatch without consuming any tokens
1847 // in the case where there is no match, as other alternatives take other
1849 AsmToken Tok = Parser.getTok();
1850 SMLoc S = Tok.getLoc();
1851 bool haveEaten = false;
1852 unsigned Imm = ARM_AM::getAM3Opc(ARM_AM::add, 0);
1854 if (Tok.is(AsmToken::Plus)) {
1855 Parser.Lex(); // Eat the '+' token.
1857 } else if (Tok.is(AsmToken::Minus)) {
1858 Parser.Lex(); // Eat the '-' token.
1859 Imm = ARM_AM::getAM3Opc(ARM_AM::sub, 0);
1862 if (Parser.getTok().is(AsmToken::Identifier))
1863 Reg = tryParseRegister();
1866 return MatchOperand_NoMatch;
1867 Error(Parser.getTok().getLoc(), "register expected");
1868 return MatchOperand_ParseFail;
1870 SMLoc E = Parser.getTok().getLoc();
1872 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, Imm, S, E));
1874 return MatchOperand_Success;
1877 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1878 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1879 /// when they refer multiple MIOperands inside a single one.
1881 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1882 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1883 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1885 // Create a writeback register dummy placeholder.
1886 Inst.addOperand(MCOperand::CreateImm(0));
1888 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
1889 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1893 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1894 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1895 /// when they refer multiple MIOperands inside a single one.
1897 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1898 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1899 // Create a writeback register dummy placeholder.
1900 Inst.addOperand(MCOperand::CreateImm(0));
1901 assert(0 && "cvtStWriteBackRegAddrMode2 not implemented yet!");
1905 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
1906 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1907 /// when they refer multiple MIOperands inside a single one.
1909 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
1910 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1912 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1913 // Create a writeback register dummy placeholder.
1914 Inst.addOperand(MCOperand::CreateImm(0));
1916 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
1918 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
1920 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1924 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
1925 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1926 /// when they refer multiple MIOperands inside a single one.
1928 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
1929 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1931 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1932 // Create a writeback register dummy placeholder.
1933 Inst.addOperand(MCOperand::CreateImm(0));
1935 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
1937 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
1939 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1943 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
1944 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1945 /// when they refer multiple MIOperands inside a single one.
1947 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
1948 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1949 // Create a writeback register dummy placeholder.
1950 Inst.addOperand(MCOperand::CreateImm(0));
1952 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1954 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
1956 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
1958 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1962 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
1963 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1964 /// when they refer multiple MIOperands inside a single one.
1966 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
1967 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1968 // Create a writeback register dummy placeholder.
1969 Inst.addOperand(MCOperand::CreateImm(0));
1971 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1973 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
1975 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
1977 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1981 /// Parse an ARM memory expression, return false if successful else return true
1982 /// or an error. The first token must be a '[' when called.
1984 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1986 assert(Parser.getTok().is(AsmToken::LBrac) &&
1987 "Token is not a Left Bracket");
1988 S = Parser.getTok().getLoc();
1989 Parser.Lex(); // Eat left bracket token.
1991 const AsmToken &BaseRegTok = Parser.getTok();
1992 int BaseRegNum = tryParseRegister();
1993 if (BaseRegNum == -1)
1994 return Error(BaseRegTok.getLoc(), "register expected");
1996 // The next token must either be a comma or a closing bracket.
1997 const AsmToken &Tok = Parser.getTok();
1998 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
1999 return Error(Tok.getLoc(), "malformed memory operand");
2001 if (Tok.is(AsmToken::RBrac)) {
2003 Parser.Lex(); // Eat right bracket token.
2005 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2011 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2012 Parser.Lex(); // Eat the comma.
2014 // If we have a '#' it's an immediate offset, else assume it's a register
2016 if (Parser.getTok().is(AsmToken::Hash)) {
2017 Parser.Lex(); // Eat the '#'.
2018 E = Parser.getTok().getLoc();
2020 // FIXME: Special case #-0 so we can correctly set the U bit.
2022 const MCExpr *Offset;
2023 if (getParser().ParseExpression(Offset))
2026 // The expression has to be a constant. Memory references with relocations
2027 // don't come through here, as they use the <label> forms of the relevant
2029 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2031 return Error (E, "constant expression expected");
2033 // Now we should have the closing ']'
2034 E = Parser.getTok().getLoc();
2035 if (Parser.getTok().isNot(AsmToken::RBrac))
2036 return Error(E, "']' expected");
2037 Parser.Lex(); // Eat right bracket token.
2039 // Don't worry about range checking the value here. That's handled by
2040 // the is*() predicates.
2041 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2042 ARM_AM::no_shift, 0, false, S,E));
2044 // If there's a pre-indexing writeback marker, '!', just add it as a token
2046 if (Parser.getTok().is(AsmToken::Exclaim)) {
2047 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2048 Parser.Lex(); // Eat the '!'.
2054 // The register offset is optionally preceded by a '+' or '-'
2055 bool isNegative = false;
2056 if (Parser.getTok().is(AsmToken::Minus)) {
2058 Parser.Lex(); // Eat the '-'.
2059 } else if (Parser.getTok().is(AsmToken::Plus)) {
2061 Parser.Lex(); // Eat the '+'.
2064 E = Parser.getTok().getLoc();
2065 int OffsetRegNum = tryParseRegister();
2066 if (OffsetRegNum == -1)
2067 return Error(E, "register expected");
2069 // If there's a shift operator, handle it.
2070 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2071 unsigned ShiftValue = 0;
2072 if (Parser.getTok().is(AsmToken::Comma)) {
2073 Parser.Lex(); // Eat the ','.
2074 if (parseMemRegOffsetShift(ShiftType, ShiftValue))
2078 // Now we should have the closing ']'
2079 E = Parser.getTok().getLoc();
2080 if (Parser.getTok().isNot(AsmToken::RBrac))
2081 return Error(E, "']' expected");
2082 Parser.Lex(); // Eat right bracket token.
2084 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2085 ShiftType, ShiftValue, isNegative,
2093 /// parseMemRegOffsetShift - one of these two:
2094 /// ( lsl | lsr | asr | ror ) , # shift_amount
2096 /// return true if it parses a shift otherwise it returns false.
2097 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2099 SMLoc Loc = Parser.getTok().getLoc();
2100 const AsmToken &Tok = Parser.getTok();
2101 if (Tok.isNot(AsmToken::Identifier))
2103 StringRef ShiftName = Tok.getString();
2104 if (ShiftName == "lsl" || ShiftName == "LSL")
2106 else if (ShiftName == "lsr" || ShiftName == "LSR")
2108 else if (ShiftName == "asr" || ShiftName == "ASR")
2110 else if (ShiftName == "ror" || ShiftName == "ROR")
2112 else if (ShiftName == "rrx" || ShiftName == "RRX")
2115 return Error(Loc, "illegal shift operator");
2116 Parser.Lex(); // Eat shift type token.
2118 // rrx stands alone.
2120 if (St != ARM_AM::rrx) {
2121 Loc = Parser.getTok().getLoc();
2122 // A '#' and a shift amount.
2123 const AsmToken &HashTok = Parser.getTok();
2124 if (HashTok.isNot(AsmToken::Hash))
2125 return Error(HashTok.getLoc(), "'#' expected");
2126 Parser.Lex(); // Eat hash token.
2129 if (getParser().ParseExpression(Expr))
2131 // Range check the immediate.
2132 // lsl, ror: 0 <= imm <= 31
2133 // lsr, asr: 0 <= imm <= 32
2134 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2136 return Error(Loc, "shift amount must be an immediate");
2137 int64_t Imm = CE->getValue();
2139 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2140 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2141 return Error(Loc, "immediate shift value out of range");
2148 /// Parse a arm instruction operand. For now this parses the operand regardless
2149 /// of the mnemonic.
2150 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2151 StringRef Mnemonic) {
2154 // Check if the current operand has a custom associated parser, if so, try to
2155 // custom parse the operand, or fallback to the general approach.
2156 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2157 if (ResTy == MatchOperand_Success)
2159 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2160 // there was a match, but an error occurred, in which case, just return that
2161 // the operand parsing failed.
2162 if (ResTy == MatchOperand_ParseFail)
2165 switch (getLexer().getKind()) {
2167 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2169 case AsmToken::Identifier: {
2170 if (!tryParseRegisterWithWriteBack(Operands))
2172 int Res = tryParseShiftRegister(Operands);
2173 if (Res == 0) // success
2175 else if (Res == -1) // irrecoverable error
2178 // Fall though for the Identifier case that is not a register or a
2181 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2182 case AsmToken::Dot: { // . as a branch target
2183 // This was not a register so parse other operands that start with an
2184 // identifier (like labels) as expressions and create them as immediates.
2185 const MCExpr *IdVal;
2186 S = Parser.getTok().getLoc();
2187 if (getParser().ParseExpression(IdVal))
2189 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2190 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2193 case AsmToken::LBrac:
2194 return parseMemory(Operands);
2195 case AsmToken::LCurly:
2196 return parseRegisterList(Operands);
2197 case AsmToken::Hash:
2198 // #42 -> immediate.
2199 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2200 S = Parser.getTok().getLoc();
2202 const MCExpr *ImmVal;
2203 if (getParser().ParseExpression(ImmVal))
2205 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2206 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2208 case AsmToken::Colon: {
2209 // ":lower16:" and ":upper16:" expression prefixes
2210 // FIXME: Check it's an expression prefix,
2211 // e.g. (FOO - :lower16:BAR) isn't legal.
2212 ARMMCExpr::VariantKind RefKind;
2213 if (parsePrefix(RefKind))
2216 const MCExpr *SubExprVal;
2217 if (getParser().ParseExpression(SubExprVal))
2220 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2222 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2223 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2229 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2230 // :lower16: and :upper16:.
2231 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2232 RefKind = ARMMCExpr::VK_ARM_None;
2234 // :lower16: and :upper16: modifiers
2235 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2236 Parser.Lex(); // Eat ':'
2238 if (getLexer().isNot(AsmToken::Identifier)) {
2239 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2243 StringRef IDVal = Parser.getTok().getIdentifier();
2244 if (IDVal == "lower16") {
2245 RefKind = ARMMCExpr::VK_ARM_LO16;
2246 } else if (IDVal == "upper16") {
2247 RefKind = ARMMCExpr::VK_ARM_HI16;
2249 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2254 if (getLexer().isNot(AsmToken::Colon)) {
2255 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2258 Parser.Lex(); // Eat the last ':'
2263 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2264 MCSymbolRefExpr::VariantKind Variant) {
2265 // Recurse over the given expression, rebuilding it to apply the given variant
2266 // to the leftmost symbol.
2267 if (Variant == MCSymbolRefExpr::VK_None)
2270 switch (E->getKind()) {
2271 case MCExpr::Target:
2272 llvm_unreachable("Can't handle target expr yet");
2273 case MCExpr::Constant:
2274 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2276 case MCExpr::SymbolRef: {
2277 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2279 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2282 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2286 llvm_unreachable("Can't handle unary expressions yet");
2288 case MCExpr::Binary: {
2289 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2290 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2291 const MCExpr *RHS = BE->getRHS();
2295 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2299 assert(0 && "Invalid expression kind!");
2303 /// \brief Given a mnemonic, split out possible predication code and carry
2304 /// setting letters to form a canonical mnemonic and flags.
2306 // FIXME: Would be nice to autogen this.
2307 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2308 unsigned &PredicationCode,
2310 unsigned &ProcessorIMod) {
2311 PredicationCode = ARMCC::AL;
2312 CarrySetting = false;
2315 // Ignore some mnemonics we know aren't predicated forms.
2317 // FIXME: Would be nice to autogen this.
2318 if ((Mnemonic == "movs" && isThumb()) ||
2319 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2320 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2321 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2322 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2323 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2324 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2325 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2328 // First, split out any predication code. Ignore mnemonics we know aren't
2329 // predicated but do have a carry-set and so weren't caught above.
2330 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2331 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2332 Mnemonic != "umlals" && Mnemonic != "umulls") {
2333 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2334 .Case("eq", ARMCC::EQ)
2335 .Case("ne", ARMCC::NE)
2336 .Case("hs", ARMCC::HS)
2337 .Case("cs", ARMCC::HS)
2338 .Case("lo", ARMCC::LO)
2339 .Case("cc", ARMCC::LO)
2340 .Case("mi", ARMCC::MI)
2341 .Case("pl", ARMCC::PL)
2342 .Case("vs", ARMCC::VS)
2343 .Case("vc", ARMCC::VC)
2344 .Case("hi", ARMCC::HI)
2345 .Case("ls", ARMCC::LS)
2346 .Case("ge", ARMCC::GE)
2347 .Case("lt", ARMCC::LT)
2348 .Case("gt", ARMCC::GT)
2349 .Case("le", ARMCC::LE)
2350 .Case("al", ARMCC::AL)
2353 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2354 PredicationCode = CC;
2358 // Next, determine if we have a carry setting bit. We explicitly ignore all
2359 // the instructions we know end in 's'.
2360 if (Mnemonic.endswith("s") &&
2361 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
2362 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2363 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2364 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2365 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2366 (Mnemonic == "movs" && isThumb()))) {
2367 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2368 CarrySetting = true;
2371 // The "cps" instruction can have a interrupt mode operand which is glued into
2372 // the mnemonic. Check if this is the case, split it and parse the imod op
2373 if (Mnemonic.startswith("cps")) {
2374 // Split out any imod code.
2376 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2377 .Case("ie", ARM_PROC::IE)
2378 .Case("id", ARM_PROC::ID)
2381 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2382 ProcessorIMod = IMod;
2389 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2390 /// inclusion of carry set or predication code operands.
2392 // FIXME: It would be nice to autogen this.
2394 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2395 bool &CanAcceptPredicationCode) {
2396 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2397 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2398 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2399 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2400 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2401 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2402 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2403 Mnemonic == "eor" || Mnemonic == "smlal" ||
2404 (Mnemonic == "mov" && !isThumbOne())) {
2405 CanAcceptCarrySet = true;
2407 CanAcceptCarrySet = false;
2410 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2411 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2412 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2413 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2414 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2415 Mnemonic == "setend" ||
2416 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2417 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2419 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2420 CanAcceptPredicationCode = false;
2422 CanAcceptPredicationCode = true;
2426 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2427 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2428 CanAcceptPredicationCode = false;
2431 /// Parse an arm instruction mnemonic followed by its operands.
2432 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2433 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2434 // Create the leading tokens for the mnemonic, split by '.' characters.
2435 size_t Start = 0, Next = Name.find('.');
2436 StringRef Mnemonic = Name.slice(Start, Next);
2438 // Split out the predication code and carry setting flag from the mnemonic.
2439 unsigned PredicationCode;
2440 unsigned ProcessorIMod;
2442 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2445 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2447 // FIXME: This is all a pretty gross hack. We should automatically handle
2448 // optional operands like this via tblgen.
2450 // Next, add the CCOut and ConditionCode operands, if needed.
2452 // For mnemonics which can ever incorporate a carry setting bit or predication
2453 // code, our matching model involves us always generating CCOut and
2454 // ConditionCode operands to match the mnemonic "as written" and then we let
2455 // the matcher deal with finding the right instruction or generating an
2456 // appropriate error.
2457 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2458 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2460 // If we had a carry-set on an instruction that can't do that, issue an
2462 if (!CanAcceptCarrySet && CarrySetting) {
2463 Parser.EatToEndOfStatement();
2464 return Error(NameLoc, "instruction '" + Mnemonic +
2465 "' can not set flags, but 's' suffix specified");
2467 // If we had a predication code on an instruction that can't do that, issue an
2469 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2470 Parser.EatToEndOfStatement();
2471 return Error(NameLoc, "instruction '" + Mnemonic +
2472 "' is not predicable, but condition code specified");
2475 // Add the carry setting operand, if necessary.
2477 // FIXME: It would be awesome if we could somehow invent a location such that
2478 // match errors on this operand would print a nice diagnostic about how the
2479 // 's' character in the mnemonic resulted in a CCOut operand.
2480 if (CanAcceptCarrySet)
2481 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2484 // Add the predication code operand, if necessary.
2485 if (CanAcceptPredicationCode) {
2486 Operands.push_back(ARMOperand::CreateCondCode(
2487 ARMCC::CondCodes(PredicationCode), NameLoc));
2490 // Add the processor imod operand, if necessary.
2491 if (ProcessorIMod) {
2492 Operands.push_back(ARMOperand::CreateImm(
2493 MCConstantExpr::Create(ProcessorIMod, getContext()),
2496 // This mnemonic can't ever accept a imod, but the user wrote
2497 // one (or misspelled another mnemonic).
2499 // FIXME: Issue a nice error.
2502 // Add the remaining tokens in the mnemonic.
2503 while (Next != StringRef::npos) {
2505 Next = Name.find('.', Start + 1);
2506 StringRef ExtraToken = Name.slice(Start, Next);
2508 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2511 // Read the remaining operands.
2512 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2513 // Read the first operand.
2514 if (parseOperand(Operands, Mnemonic)) {
2515 Parser.EatToEndOfStatement();
2519 while (getLexer().is(AsmToken::Comma)) {
2520 Parser.Lex(); // Eat the comma.
2522 // Parse and remember the operand.
2523 if (parseOperand(Operands, Mnemonic)) {
2524 Parser.EatToEndOfStatement();
2530 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2531 Parser.EatToEndOfStatement();
2532 return TokError("unexpected token in argument list");
2535 Parser.Lex(); // Consume the EndOfStatement
2538 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2539 // another does not. Specifically, the MOVW instruction does not. So we
2540 // special case it here and remove the defaulted (non-setting) cc_out
2541 // operand if that's the instruction we're trying to match.
2543 // We do this post-processing of the explicit operands rather than just
2544 // conditionally adding the cc_out in the first place because we need
2545 // to check the type of the parsed immediate operand.
2546 if (Mnemonic == "mov" && Operands.size() > 4 &&
2547 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2548 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2549 static_cast<ARMOperand*>(Operands[1])->getReg() == 0) {
2550 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2551 Operands.erase(Operands.begin() + 1);
2555 // ARM mode 'blx' need special handling, as the register operand version
2556 // is predicable, but the label operand version is not. So, we can't rely
2557 // on the Mnemonic based checking to correctly figure out when to put
2558 // a CondCode operand in the list. If we're trying to match the label
2559 // version, remove the CondCode operand here.
2560 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2561 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2562 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2563 Operands.erase(Operands.begin() + 1);
2569 // Validate context-sensitive operand constraints.
2570 // FIXME: We would really like to be able to tablegen'erate this.
2572 validateInstruction(MCInst &Inst,
2573 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2574 switch (Inst.getOpcode()) {
2576 // Rt2 must be Rt + 1.
2577 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2578 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2580 return Error(Operands[3]->getStartLoc(),
2581 "destination operands must be sequential");
2585 // Rt2 must be Rt + 1.
2586 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2587 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
2589 return Error(Operands[4]->getStartLoc(),
2590 "source operands must be sequential");
2595 // width must be in range [1, 32-lsb]
2596 unsigned lsb = Inst.getOperand(2).getImm();
2597 unsigned widthm1 = Inst.getOperand(3).getImm();
2598 if (widthm1 >= 32 - lsb)
2599 return Error(Operands[5]->getStartLoc(),
2600 "bitfield width must be in range [1,32-lsb]");
2608 MatchAndEmitInstruction(SMLoc IDLoc,
2609 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2613 MatchResultTy MatchResult;
2614 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2615 switch (MatchResult) {
2617 // Context sensitive operand constraints aren't handled by the matcher,
2618 // so check them here.
2619 if (validateInstruction(Inst, Operands))
2622 Out.EmitInstruction(Inst);
2624 case Match_MissingFeature:
2625 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2627 case Match_InvalidOperand: {
2628 SMLoc ErrorLoc = IDLoc;
2629 if (ErrorInfo != ~0U) {
2630 if (ErrorInfo >= Operands.size())
2631 return Error(IDLoc, "too few operands for instruction");
2633 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2634 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2637 return Error(ErrorLoc, "invalid operand for instruction");
2639 case Match_MnemonicFail:
2640 return Error(IDLoc, "unrecognized instruction mnemonic");
2641 case Match_ConversionFail:
2642 return Error(IDLoc, "unable to convert operands to instruction");
2645 llvm_unreachable("Implement any new match types added!");
2649 /// parseDirective parses the arm specific directives
2650 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2651 StringRef IDVal = DirectiveID.getIdentifier();
2652 if (IDVal == ".word")
2653 return parseDirectiveWord(4, DirectiveID.getLoc());
2654 else if (IDVal == ".thumb")
2655 return parseDirectiveThumb(DirectiveID.getLoc());
2656 else if (IDVal == ".thumb_func")
2657 return parseDirectiveThumbFunc(DirectiveID.getLoc());
2658 else if (IDVal == ".code")
2659 return parseDirectiveCode(DirectiveID.getLoc());
2660 else if (IDVal == ".syntax")
2661 return parseDirectiveSyntax(DirectiveID.getLoc());
2665 /// parseDirectiveWord
2666 /// ::= .word [ expression (, expression)* ]
2667 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
2668 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2670 const MCExpr *Value;
2671 if (getParser().ParseExpression(Value))
2674 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2676 if (getLexer().is(AsmToken::EndOfStatement))
2679 // FIXME: Improve diagnostic.
2680 if (getLexer().isNot(AsmToken::Comma))
2681 return Error(L, "unexpected token in directive");
2690 /// parseDirectiveThumb
2692 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
2693 if (getLexer().isNot(AsmToken::EndOfStatement))
2694 return Error(L, "unexpected token in directive");
2697 // TODO: set thumb mode
2698 // TODO: tell the MC streamer the mode
2699 // getParser().getStreamer().Emit???();
2703 /// parseDirectiveThumbFunc
2704 /// ::= .thumbfunc symbol_name
2705 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
2706 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
2707 bool isMachO = MAI.hasSubsectionsViaSymbols();
2710 // Darwin asm has function name after .thumb_func direction
2713 const AsmToken &Tok = Parser.getTok();
2714 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
2715 return Error(L, "unexpected token in .thumb_func directive");
2716 Name = Tok.getString();
2717 Parser.Lex(); // Consume the identifier token.
2720 if (getLexer().isNot(AsmToken::EndOfStatement))
2721 return Error(L, "unexpected token in directive");
2724 // FIXME: assuming function name will be the line following .thumb_func
2726 Name = Parser.getTok().getString();
2729 // Mark symbol as a thumb symbol.
2730 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
2731 getParser().getStreamer().EmitThumbFunc(Func);
2735 /// parseDirectiveSyntax
2736 /// ::= .syntax unified | divided
2737 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
2738 const AsmToken &Tok = Parser.getTok();
2739 if (Tok.isNot(AsmToken::Identifier))
2740 return Error(L, "unexpected token in .syntax directive");
2741 StringRef Mode = Tok.getString();
2742 if (Mode == "unified" || Mode == "UNIFIED")
2744 else if (Mode == "divided" || Mode == "DIVIDED")
2745 return Error(L, "'.syntax divided' arm asssembly not supported");
2747 return Error(L, "unrecognized syntax mode in .syntax directive");
2749 if (getLexer().isNot(AsmToken::EndOfStatement))
2750 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2753 // TODO tell the MC streamer the mode
2754 // getParser().getStreamer().Emit???();
2758 /// parseDirectiveCode
2759 /// ::= .code 16 | 32
2760 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
2761 const AsmToken &Tok = Parser.getTok();
2762 if (Tok.isNot(AsmToken::Integer))
2763 return Error(L, "unexpected token in .code directive");
2764 int64_t Val = Parser.getTok().getIntVal();
2770 return Error(L, "invalid operand to .code directive");
2772 if (getLexer().isNot(AsmToken::EndOfStatement))
2773 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2779 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
2784 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
2791 extern "C" void LLVMInitializeARMAsmLexer();
2793 /// Force static initialization.
2794 extern "C" void LLVMInitializeARMAsmParser() {
2795 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
2796 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
2797 LLVMInitializeARMAsmLexer();
2800 #define GET_REGISTER_MATCHER
2801 #define GET_MATCHER_IMPLEMENTATION
2802 #include "ARMGenAsmMatcher.inc"