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 ShiftImm; // shift for OffsetReg.
230 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
236 ARM_AM::ShiftOpc ShiftTy;
245 ARM_AM::ShiftOpc ShiftTy;
251 ARM_AM::ShiftOpc ShiftTy;
264 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
266 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
268 StartLoc = o.StartLoc;
282 case DPRRegisterList:
283 case SPRRegisterList:
284 Registers = o.Registers;
299 case PostIndexRegister:
300 PostIdxReg = o.PostIdxReg;
308 case ShifterImmediate:
309 ShifterImm = o.ShifterImm;
311 case ShiftedRegister:
312 RegShiftedReg = o.RegShiftedReg;
314 case ShiftedImmediate:
315 RegShiftedImm = o.RegShiftedImm;
317 case RotateImmediate:
320 case BitfieldDescriptor:
321 Bitfield = o.Bitfield;
326 /// getStartLoc - Get the location of the first token of this operand.
327 SMLoc getStartLoc() const { return StartLoc; }
328 /// getEndLoc - Get the location of the last token of this operand.
329 SMLoc getEndLoc() const { return EndLoc; }
331 ARMCC::CondCodes getCondCode() const {
332 assert(Kind == CondCode && "Invalid access!");
336 unsigned getCoproc() const {
337 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
341 StringRef getToken() const {
342 assert(Kind == Token && "Invalid access!");
343 return StringRef(Tok.Data, Tok.Length);
346 unsigned getReg() const {
347 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
351 const SmallVectorImpl<unsigned> &getRegList() const {
352 assert((Kind == RegisterList || Kind == DPRRegisterList ||
353 Kind == SPRRegisterList) && "Invalid access!");
357 const MCExpr *getImm() const {
358 assert(Kind == Immediate && "Invalid access!");
362 ARM_MB::MemBOpt getMemBarrierOpt() const {
363 assert(Kind == MemBarrierOpt && "Invalid access!");
367 ARM_PROC::IFlags getProcIFlags() const {
368 assert(Kind == ProcIFlags && "Invalid access!");
372 unsigned getMSRMask() const {
373 assert(Kind == MSRMask && "Invalid access!");
377 bool isCoprocNum() const { return Kind == CoprocNum; }
378 bool isCoprocReg() const { return Kind == CoprocReg; }
379 bool isCondCode() const { return Kind == CondCode; }
380 bool isCCOut() const { return Kind == CCOut; }
381 bool isImm() const { return Kind == Immediate; }
382 bool isImm0_255() const {
383 if (Kind != Immediate)
385 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
386 if (!CE) return false;
387 int64_t Value = CE->getValue();
388 return Value >= 0 && Value < 256;
390 bool isImm0_7() const {
391 if (Kind != Immediate)
393 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
394 if (!CE) return false;
395 int64_t Value = CE->getValue();
396 return Value >= 0 && Value < 8;
398 bool isImm0_15() const {
399 if (Kind != Immediate)
401 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
402 if (!CE) return false;
403 int64_t Value = CE->getValue();
404 return Value >= 0 && Value < 16;
406 bool isImm0_31() const {
407 if (Kind != Immediate)
409 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
410 if (!CE) return false;
411 int64_t Value = CE->getValue();
412 return Value >= 0 && Value < 32;
414 bool isImm1_16() const {
415 if (Kind != Immediate)
417 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
418 if (!CE) return false;
419 int64_t Value = CE->getValue();
420 return Value > 0 && Value < 17;
422 bool isImm1_32() const {
423 if (Kind != Immediate)
425 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
426 if (!CE) return false;
427 int64_t Value = CE->getValue();
428 return Value > 0 && Value < 33;
430 bool isImm0_65535() const {
431 if (Kind != Immediate)
433 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
434 if (!CE) return false;
435 int64_t Value = CE->getValue();
436 return Value >= 0 && Value < 65536;
438 bool isImm0_65535Expr() const {
439 if (Kind != Immediate)
441 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
442 // If it's not a constant expression, it'll generate a fixup and be
444 if (!CE) return true;
445 int64_t Value = CE->getValue();
446 return Value >= 0 && Value < 65536;
448 bool isImm24bit() const {
449 if (Kind != Immediate)
451 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
452 if (!CE) return false;
453 int64_t Value = CE->getValue();
454 return Value >= 0 && Value <= 0xffffff;
456 bool isPKHLSLImm() const {
457 if (Kind != Immediate)
459 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
460 if (!CE) return false;
461 int64_t Value = CE->getValue();
462 return Value >= 0 && Value < 32;
464 bool isPKHASRImm() const {
465 if (Kind != Immediate)
467 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
468 if (!CE) return false;
469 int64_t Value = CE->getValue();
470 return Value > 0 && Value <= 32;
472 bool isARMSOImm() const {
473 if (Kind != Immediate)
475 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
476 if (!CE) return false;
477 int64_t Value = CE->getValue();
478 return ARM_AM::getSOImmVal(Value) != -1;
480 bool isT2SOImm() const {
481 if (Kind != Immediate)
483 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
484 if (!CE) return false;
485 int64_t Value = CE->getValue();
486 return ARM_AM::getT2SOImmVal(Value) != -1;
488 bool isSetEndImm() const {
489 if (Kind != Immediate)
491 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
492 if (!CE) return false;
493 int64_t Value = CE->getValue();
494 return Value == 1 || Value == 0;
496 bool isReg() const { return Kind == Register; }
497 bool isRegList() const { return Kind == RegisterList; }
498 bool isDPRRegList() const { return Kind == DPRRegisterList; }
499 bool isSPRRegList() const { return Kind == SPRRegisterList; }
500 bool isToken() const { return Kind == Token; }
501 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
502 bool isMemory() const { return Kind == Memory; }
503 bool isShifterImm() const { return Kind == ShifterImmediate; }
504 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
505 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
506 bool isRotImm() const { return Kind == RotateImmediate; }
507 bool isBitfield() const { return Kind == BitfieldDescriptor; }
508 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
509 bool isPostIdxReg() const {
510 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
512 bool isMemNoOffset() const {
515 // No offset of any kind.
516 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
518 bool isAddrMode2() const {
521 // Check for register offset.
522 if (Mem.OffsetRegNum) return true;
523 // Immediate offset in range [-4095, 4095].
524 if (!Mem.OffsetImm) return true;
525 int64_t Val = Mem.OffsetImm->getValue();
526 return Val > -4096 && Val < 4096;
528 bool isAM2OffsetImm() const {
529 if (Kind != Immediate)
531 // Immediate offset in range [-4095, 4095].
532 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
533 if (!CE) return false;
534 int64_t Val = CE->getValue();
535 return Val > -4096 && Val < 4096;
537 bool isAddrMode5() const {
540 // Check for register offset.
541 if (Mem.OffsetRegNum) return false;
542 // Immediate offset in range [-1020, 1020] and a multiple of 4.
543 if (!Mem.OffsetImm) return true;
544 int64_t Val = Mem.OffsetImm->getValue();
545 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
547 bool isMemRegOffset() const {
548 if (Kind != Memory || !Mem.OffsetRegNum)
552 bool isMemThumbRR() const {
553 // Thumb reg+reg addressing is simple. Just two registers, a base and
554 // an offset. No shifts, negations or any other complicating factors.
555 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
556 Mem.ShiftType != ARM_AM::no_shift)
560 bool isMemImm8Offset() const {
561 if (Kind != Memory || Mem.OffsetRegNum != 0)
563 // Immediate offset in range [-255, 255].
564 if (!Mem.OffsetImm) return true;
565 int64_t Val = Mem.OffsetImm->getValue();
566 return Val > -256 && Val < 256;
568 bool isMemImm12Offset() const {
569 // If we have an immediate that's not a constant, treat it as a label
570 // reference needing a fixup. If it is a constant, it's something else
572 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
575 if (Kind != Memory || Mem.OffsetRegNum != 0)
577 // Immediate offset in range [-4095, 4095].
578 if (!Mem.OffsetImm) return true;
579 int64_t Val = Mem.OffsetImm->getValue();
580 return Val > -4096 && Val < 4096;
582 bool isPostIdxImm8() const {
583 if (Kind != Immediate)
585 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
586 if (!CE) return false;
587 int64_t Val = CE->getValue();
588 return Val > -256 && Val < 256;
591 bool isMSRMask() const { return Kind == MSRMask; }
592 bool isProcIFlags() const { return Kind == ProcIFlags; }
594 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
595 // Add as immediates when possible. Null MCExpr = 0.
597 Inst.addOperand(MCOperand::CreateImm(0));
598 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
599 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
601 Inst.addOperand(MCOperand::CreateExpr(Expr));
604 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
605 assert(N == 2 && "Invalid number of operands!");
606 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
607 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
608 Inst.addOperand(MCOperand::CreateReg(RegNum));
611 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
612 assert(N == 1 && "Invalid number of operands!");
613 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
616 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
617 assert(N == 1 && "Invalid number of operands!");
618 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
621 void addCCOutOperands(MCInst &Inst, unsigned N) const {
622 assert(N == 1 && "Invalid number of operands!");
623 Inst.addOperand(MCOperand::CreateReg(getReg()));
626 void addRegOperands(MCInst &Inst, unsigned N) const {
627 assert(N == 1 && "Invalid number of operands!");
628 Inst.addOperand(MCOperand::CreateReg(getReg()));
631 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
632 assert(N == 3 && "Invalid number of operands!");
633 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
634 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
635 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
636 Inst.addOperand(MCOperand::CreateImm(
637 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
640 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
641 assert(N == 2 && "Invalid number of operands!");
642 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
643 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
644 Inst.addOperand(MCOperand::CreateImm(
645 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
649 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
650 assert(N == 1 && "Invalid number of operands!");
651 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
655 void addRegListOperands(MCInst &Inst, unsigned N) const {
656 assert(N == 1 && "Invalid number of operands!");
657 const SmallVectorImpl<unsigned> &RegList = getRegList();
658 for (SmallVectorImpl<unsigned>::const_iterator
659 I = RegList.begin(), E = RegList.end(); I != E; ++I)
660 Inst.addOperand(MCOperand::CreateReg(*I));
663 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
664 addRegListOperands(Inst, N);
667 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
668 addRegListOperands(Inst, N);
671 void addRotImmOperands(MCInst &Inst, unsigned N) const {
672 assert(N == 1 && "Invalid number of operands!");
673 // Encoded as val>>3. The printer handles display as 8, 16, 24.
674 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
677 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
678 assert(N == 1 && "Invalid number of operands!");
679 // Munge the lsb/width into a bitfield mask.
680 unsigned lsb = Bitfield.LSB;
681 unsigned width = Bitfield.Width;
682 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
683 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
684 (32 - (lsb + width)));
685 Inst.addOperand(MCOperand::CreateImm(Mask));
688 void addImmOperands(MCInst &Inst, unsigned N) const {
689 assert(N == 1 && "Invalid number of operands!");
690 addExpr(Inst, getImm());
693 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
694 assert(N == 1 && "Invalid number of operands!");
695 addExpr(Inst, getImm());
698 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
699 assert(N == 1 && "Invalid number of operands!");
700 addExpr(Inst, getImm());
703 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
704 assert(N == 1 && "Invalid number of operands!");
705 addExpr(Inst, getImm());
708 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
709 assert(N == 1 && "Invalid number of operands!");
710 addExpr(Inst, getImm());
713 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
714 assert(N == 1 && "Invalid number of operands!");
715 // The constant encodes as the immediate-1, and we store in the instruction
716 // the bits as encoded, so subtract off one here.
717 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
718 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
721 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
722 assert(N == 1 && "Invalid number of operands!");
723 // The constant encodes as the immediate-1, and we store in the instruction
724 // the bits as encoded, so subtract off one here.
725 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
726 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
729 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
730 assert(N == 1 && "Invalid number of operands!");
731 addExpr(Inst, getImm());
734 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
735 assert(N == 1 && "Invalid number of operands!");
736 addExpr(Inst, getImm());
739 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
740 assert(N == 1 && "Invalid number of operands!");
741 addExpr(Inst, getImm());
744 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
745 assert(N == 1 && "Invalid number of operands!");
746 addExpr(Inst, getImm());
749 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
750 assert(N == 1 && "Invalid number of operands!");
751 // An ASR value of 32 encodes as 0, so that's how we want to add it to
752 // the instruction as well.
753 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
754 int Val = CE->getValue();
755 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
758 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
759 assert(N == 1 && "Invalid number of operands!");
760 addExpr(Inst, getImm());
763 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
764 assert(N == 1 && "Invalid number of operands!");
765 addExpr(Inst, getImm());
768 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
769 assert(N == 1 && "Invalid number of operands!");
770 addExpr(Inst, getImm());
773 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
774 assert(N == 1 && "Invalid number of operands!");
775 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
778 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
779 assert(N == 1 && "Invalid number of operands!");
780 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
783 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
784 assert(N == 3 && "Invalid number of operands!");
785 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
786 if (!Mem.OffsetRegNum) {
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::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
793 // For register offset, we encode the shift type and negation flag
795 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
798 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
799 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
800 Inst.addOperand(MCOperand::CreateImm(Val));
803 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
804 assert(N == 2 && "Invalid number of operands!");
805 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
806 assert(CE && "non-constant AM2OffsetImm operand!");
807 int32_t Val = CE->getValue();
808 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
809 // Special case for #-0
810 if (Val == INT32_MIN) Val = 0;
811 if (Val < 0) Val = -Val;
812 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
813 Inst.addOperand(MCOperand::CreateReg(0));
814 Inst.addOperand(MCOperand::CreateImm(Val));
817 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
818 assert(N == 2 && "Invalid number of operands!");
819 // The lower two bits are always zero and as such are not encoded.
820 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
821 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
822 // Special case for #-0
823 if (Val == INT32_MIN) Val = 0;
824 if (Val < 0) Val = -Val;
825 Val = ARM_AM::getAM5Opc(AddSub, Val);
826 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
827 Inst.addOperand(MCOperand::CreateImm(Val));
830 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
831 assert(N == 2 && "Invalid number of operands!");
832 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
833 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
834 Inst.addOperand(MCOperand::CreateImm(Val));
837 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
838 assert(N == 2 && "Invalid number of operands!");
839 // If this is an immediate, it's a label reference.
840 if (Kind == Immediate) {
841 addExpr(Inst, getImm());
842 Inst.addOperand(MCOperand::CreateImm(0));
846 // Otherwise, it's a normal memory reg+offset.
847 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
848 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
849 Inst.addOperand(MCOperand::CreateImm(Val));
852 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
853 assert(N == 3 && "Invalid number of operands!");
854 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
855 Mem.ShiftImm, Mem.ShiftType);
856 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
857 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
858 Inst.addOperand(MCOperand::CreateImm(Val));
861 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
862 assert(N == 2 && "Invalid number of operands!");
863 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
864 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
867 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
868 assert(N == 1 && "Invalid number of operands!");
869 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
870 assert(CE && "non-constant post-idx-imm8 operand!");
871 int Imm = CE->getValue();
872 bool isAdd = Imm >= 0;
873 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
874 Inst.addOperand(MCOperand::CreateImm(Imm));
877 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
878 assert(N == 2 && "Invalid number of operands!");
879 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
880 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
883 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
884 assert(N == 2 && "Invalid number of operands!");
885 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
886 // The sign, shift type, and shift amount are encoded in a single operand
887 // using the AM2 encoding helpers.
888 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
889 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
891 Inst.addOperand(MCOperand::CreateImm(Imm));
894 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
895 assert(N == 1 && "Invalid number of operands!");
896 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
899 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
900 assert(N == 1 && "Invalid number of operands!");
901 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
904 virtual void print(raw_ostream &OS) const;
906 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
907 ARMOperand *Op = new ARMOperand(CondCode);
914 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
915 ARMOperand *Op = new ARMOperand(CoprocNum);
916 Op->Cop.Val = CopVal;
922 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
923 ARMOperand *Op = new ARMOperand(CoprocReg);
924 Op->Cop.Val = CopVal;
930 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
931 ARMOperand *Op = new ARMOperand(CCOut);
932 Op->Reg.RegNum = RegNum;
938 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
939 ARMOperand *Op = new ARMOperand(Token);
940 Op->Tok.Data = Str.data();
941 Op->Tok.Length = Str.size();
947 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
948 ARMOperand *Op = new ARMOperand(Register);
949 Op->Reg.RegNum = RegNum;
955 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
960 ARMOperand *Op = new ARMOperand(ShiftedRegister);
961 Op->RegShiftedReg.ShiftTy = ShTy;
962 Op->RegShiftedReg.SrcReg = SrcReg;
963 Op->RegShiftedReg.ShiftReg = ShiftReg;
964 Op->RegShiftedReg.ShiftImm = ShiftImm;
970 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
974 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
975 Op->RegShiftedImm.ShiftTy = ShTy;
976 Op->RegShiftedImm.SrcReg = SrcReg;
977 Op->RegShiftedImm.ShiftImm = ShiftImm;
983 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
985 ARMOperand *Op = new ARMOperand(ShifterImmediate);
986 Op->ShifterImm.isASR = isASR;
987 Op->ShifterImm.Imm = Imm;
993 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
994 ARMOperand *Op = new ARMOperand(RotateImmediate);
995 Op->RotImm.Imm = Imm;
1001 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1003 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1004 Op->Bitfield.LSB = LSB;
1005 Op->Bitfield.Width = Width;
1012 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1013 SMLoc StartLoc, SMLoc EndLoc) {
1014 KindTy Kind = RegisterList;
1016 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1017 contains(Regs.front().first))
1018 Kind = DPRRegisterList;
1019 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1020 contains(Regs.front().first))
1021 Kind = SPRRegisterList;
1023 ARMOperand *Op = new ARMOperand(Kind);
1024 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1025 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1026 Op->Registers.push_back(I->first);
1027 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1028 Op->StartLoc = StartLoc;
1029 Op->EndLoc = EndLoc;
1033 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1034 ARMOperand *Op = new ARMOperand(Immediate);
1041 static ARMOperand *CreateMem(unsigned BaseRegNum,
1042 const MCConstantExpr *OffsetImm,
1043 unsigned OffsetRegNum,
1044 ARM_AM::ShiftOpc ShiftType,
1048 ARMOperand *Op = new ARMOperand(Memory);
1049 Op->Mem.BaseRegNum = BaseRegNum;
1050 Op->Mem.OffsetImm = OffsetImm;
1051 Op->Mem.OffsetRegNum = OffsetRegNum;
1052 Op->Mem.ShiftType = ShiftType;
1053 Op->Mem.ShiftImm = ShiftImm;
1054 Op->Mem.isNegative = isNegative;
1060 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1061 ARM_AM::ShiftOpc ShiftTy,
1064 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1065 Op->PostIdxReg.RegNum = RegNum;
1066 Op->PostIdxReg.isAdd = isAdd;
1067 Op->PostIdxReg.ShiftTy = ShiftTy;
1068 Op->PostIdxReg.ShiftImm = ShiftImm;
1074 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1075 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1076 Op->MBOpt.Val = Opt;
1082 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1083 ARMOperand *Op = new ARMOperand(ProcIFlags);
1084 Op->IFlags.Val = IFlags;
1090 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1091 ARMOperand *Op = new ARMOperand(MSRMask);
1092 Op->MMask.Val = MMask;
1099 } // end anonymous namespace.
1101 void ARMOperand::print(raw_ostream &OS) const {
1104 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1107 OS << "<ccout " << getReg() << ">";
1110 OS << "<coprocessor number: " << getCoproc() << ">";
1113 OS << "<coprocessor register: " << getCoproc() << ">";
1116 OS << "<mask: " << getMSRMask() << ">";
1119 getImm()->print(OS);
1122 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1126 << " base:" << Mem.BaseRegNum;
1129 case PostIndexRegister:
1130 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1131 << PostIdxReg.RegNum;
1132 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1133 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1134 << PostIdxReg.ShiftImm;
1138 OS << "<ARM_PROC::";
1139 unsigned IFlags = getProcIFlags();
1140 for (int i=2; i >= 0; --i)
1141 if (IFlags & (1 << i))
1142 OS << ARM_PROC::IFlagsToString(1 << i);
1147 OS << "<register " << getReg() << ">";
1149 case ShifterImmediate:
1150 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1151 << " #" << ShifterImm.Imm << ">";
1153 case ShiftedRegister:
1154 OS << "<so_reg_reg "
1155 << RegShiftedReg.SrcReg
1156 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1157 << ", " << RegShiftedReg.ShiftReg << ", "
1158 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1161 case ShiftedImmediate:
1162 OS << "<so_reg_imm "
1163 << RegShiftedImm.SrcReg
1164 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1165 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1168 case RotateImmediate:
1169 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1171 case BitfieldDescriptor:
1172 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1173 << ", width: " << Bitfield.Width << ">";
1176 case DPRRegisterList:
1177 case SPRRegisterList: {
1178 OS << "<register_list ";
1180 const SmallVectorImpl<unsigned> &RegList = getRegList();
1181 for (SmallVectorImpl<unsigned>::const_iterator
1182 I = RegList.begin(), E = RegList.end(); I != E; ) {
1184 if (++I < E) OS << ", ";
1191 OS << "'" << getToken() << "'";
1196 /// @name Auto-generated Match Functions
1199 static unsigned MatchRegisterName(StringRef Name);
1203 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1204 SMLoc &StartLoc, SMLoc &EndLoc) {
1205 RegNo = tryParseRegister();
1207 return (RegNo == (unsigned)-1);
1210 /// Try to parse a register name. The token must be an Identifier when called,
1211 /// and if it is a register name the token is eaten and the register number is
1212 /// returned. Otherwise return -1.
1214 int ARMAsmParser::tryParseRegister() {
1215 const AsmToken &Tok = Parser.getTok();
1216 if (Tok.isNot(AsmToken::Identifier)) return -1;
1218 // FIXME: Validate register for the current architecture; we have to do
1219 // validation later, so maybe there is no need for this here.
1220 std::string upperCase = Tok.getString().str();
1221 std::string lowerCase = LowercaseString(upperCase);
1222 unsigned RegNum = MatchRegisterName(lowerCase);
1224 RegNum = StringSwitch<unsigned>(lowerCase)
1225 .Case("r13", ARM::SP)
1226 .Case("r14", ARM::LR)
1227 .Case("r15", ARM::PC)
1228 .Case("ip", ARM::R12)
1231 if (!RegNum) return -1;
1233 Parser.Lex(); // Eat identifier token.
1237 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1238 // If a recoverable error occurs, return 1. If an irrecoverable error
1239 // occurs, return -1. An irrecoverable error is one where tokens have been
1240 // consumed in the process of trying to parse the shifter (i.e., when it is
1241 // indeed a shifter operand, but malformed).
1242 int ARMAsmParser::tryParseShiftRegister(
1243 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1244 SMLoc S = Parser.getTok().getLoc();
1245 const AsmToken &Tok = Parser.getTok();
1246 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1248 std::string upperCase = Tok.getString().str();
1249 std::string lowerCase = LowercaseString(upperCase);
1250 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1251 .Case("lsl", ARM_AM::lsl)
1252 .Case("lsr", ARM_AM::lsr)
1253 .Case("asr", ARM_AM::asr)
1254 .Case("ror", ARM_AM::ror)
1255 .Case("rrx", ARM_AM::rrx)
1256 .Default(ARM_AM::no_shift);
1258 if (ShiftTy == ARM_AM::no_shift)
1261 Parser.Lex(); // Eat the operator.
1263 // The source register for the shift has already been added to the
1264 // operand list, so we need to pop it off and combine it into the shifted
1265 // register operand instead.
1266 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1267 if (!PrevOp->isReg())
1268 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1269 int SrcReg = PrevOp->getReg();
1272 if (ShiftTy == ARM_AM::rrx) {
1273 // RRX Doesn't have an explicit shift amount. The encoder expects
1274 // the shift register to be the same as the source register. Seems odd,
1278 // Figure out if this is shifted by a constant or a register (for non-RRX).
1279 if (Parser.getTok().is(AsmToken::Hash)) {
1280 Parser.Lex(); // Eat hash.
1281 SMLoc ImmLoc = Parser.getTok().getLoc();
1282 const MCExpr *ShiftExpr = 0;
1283 if (getParser().ParseExpression(ShiftExpr)) {
1284 Error(ImmLoc, "invalid immediate shift value");
1287 // The expression must be evaluatable as an immediate.
1288 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1290 Error(ImmLoc, "invalid immediate shift value");
1293 // Range check the immediate.
1294 // lsl, ror: 0 <= imm <= 31
1295 // lsr, asr: 0 <= imm <= 32
1296 Imm = CE->getValue();
1298 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1299 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1300 Error(ImmLoc, "immediate shift value out of range");
1303 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1304 ShiftReg = tryParseRegister();
1305 SMLoc L = Parser.getTok().getLoc();
1306 if (ShiftReg == -1) {
1307 Error (L, "expected immediate or register in shift operand");
1311 Error (Parser.getTok().getLoc(),
1312 "expected immediate or register in shift operand");
1317 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1318 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1320 S, Parser.getTok().getLoc()));
1322 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1323 S, Parser.getTok().getLoc()));
1329 /// Try to parse a register name. The token must be an Identifier when called.
1330 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1331 /// if there is a "writeback". 'true' if it's not a register.
1333 /// TODO this is likely to change to allow different register types and or to
1334 /// parse for a specific register type.
1336 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1337 SMLoc S = Parser.getTok().getLoc();
1338 int RegNo = tryParseRegister();
1342 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1344 const AsmToken &ExclaimTok = Parser.getTok();
1345 if (ExclaimTok.is(AsmToken::Exclaim)) {
1346 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1347 ExclaimTok.getLoc()));
1348 Parser.Lex(); // Eat exclaim token
1354 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1355 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1357 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1358 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1360 switch (Name.size()) {
1363 if (Name[0] != CoprocOp)
1380 if (Name[0] != CoprocOp || Name[1] != '1')
1384 case '0': return 10;
1385 case '1': return 11;
1386 case '2': return 12;
1387 case '3': return 13;
1388 case '4': return 14;
1389 case '5': return 15;
1397 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1398 /// token must be an Identifier when called, and if it is a coprocessor
1399 /// number, the token is eaten and the operand is added to the operand list.
1400 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1401 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1402 SMLoc S = Parser.getTok().getLoc();
1403 const AsmToken &Tok = Parser.getTok();
1404 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1406 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1408 return MatchOperand_NoMatch;
1410 Parser.Lex(); // Eat identifier token.
1411 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1412 return MatchOperand_Success;
1415 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1416 /// token must be an Identifier when called, and if it is a coprocessor
1417 /// number, the token is eaten and the operand is added to the operand list.
1418 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1419 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1420 SMLoc S = Parser.getTok().getLoc();
1421 const AsmToken &Tok = Parser.getTok();
1422 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1424 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1426 return MatchOperand_NoMatch;
1428 Parser.Lex(); // Eat identifier token.
1429 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1430 return MatchOperand_Success;
1433 /// Parse a register list, return it if successful else return null. The first
1434 /// token must be a '{' when called.
1436 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1437 assert(Parser.getTok().is(AsmToken::LCurly) &&
1438 "Token is not a Left Curly Brace");
1439 SMLoc S = Parser.getTok().getLoc();
1441 // Read the rest of the registers in the list.
1442 unsigned PrevRegNum = 0;
1443 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1446 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1447 Parser.Lex(); // Eat non-identifier token.
1449 const AsmToken &RegTok = Parser.getTok();
1450 SMLoc RegLoc = RegTok.getLoc();
1451 if (RegTok.isNot(AsmToken::Identifier)) {
1452 Error(RegLoc, "register expected");
1456 int RegNum = tryParseRegister();
1458 Error(RegLoc, "register expected");
1463 int Reg = PrevRegNum;
1466 Registers.push_back(std::make_pair(Reg, RegLoc));
1467 } while (Reg != RegNum);
1469 Registers.push_back(std::make_pair(RegNum, RegLoc));
1472 PrevRegNum = RegNum;
1473 } while (Parser.getTok().is(AsmToken::Comma) ||
1474 Parser.getTok().is(AsmToken::Minus));
1476 // Process the right curly brace of the list.
1477 const AsmToken &RCurlyTok = Parser.getTok();
1478 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1479 Error(RCurlyTok.getLoc(), "'}' expected");
1483 SMLoc E = RCurlyTok.getLoc();
1484 Parser.Lex(); // Eat right curly brace token.
1486 // Verify the register list.
1487 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1488 RI = Registers.begin(), RE = Registers.end();
1490 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1491 bool EmittedWarning = false;
1493 DenseMap<unsigned, bool> RegMap;
1494 RegMap[HighRegNum] = true;
1496 for (++RI; RI != RE; ++RI) {
1497 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1498 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1501 Error(RegInfo.second, "register duplicated in register list");
1505 if (!EmittedWarning && Reg < HighRegNum)
1506 Warning(RegInfo.second,
1507 "register not in ascending order in register list");
1510 HighRegNum = std::max(Reg, HighRegNum);
1513 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1517 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1518 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1519 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1520 SMLoc S = Parser.getTok().getLoc();
1521 const AsmToken &Tok = Parser.getTok();
1522 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1523 StringRef OptStr = Tok.getString();
1525 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1526 .Case("sy", ARM_MB::SY)
1527 .Case("st", ARM_MB::ST)
1528 .Case("sh", ARM_MB::ISH)
1529 .Case("ish", ARM_MB::ISH)
1530 .Case("shst", ARM_MB::ISHST)
1531 .Case("ishst", ARM_MB::ISHST)
1532 .Case("nsh", ARM_MB::NSH)
1533 .Case("un", ARM_MB::NSH)
1534 .Case("nshst", ARM_MB::NSHST)
1535 .Case("unst", ARM_MB::NSHST)
1536 .Case("osh", ARM_MB::OSH)
1537 .Case("oshst", ARM_MB::OSHST)
1541 return MatchOperand_NoMatch;
1543 Parser.Lex(); // Eat identifier token.
1544 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1545 return MatchOperand_Success;
1548 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1549 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1550 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1551 SMLoc S = Parser.getTok().getLoc();
1552 const AsmToken &Tok = Parser.getTok();
1553 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1554 StringRef IFlagsStr = Tok.getString();
1556 unsigned IFlags = 0;
1557 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1558 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1559 .Case("a", ARM_PROC::A)
1560 .Case("i", ARM_PROC::I)
1561 .Case("f", ARM_PROC::F)
1564 // If some specific iflag is already set, it means that some letter is
1565 // present more than once, this is not acceptable.
1566 if (Flag == ~0U || (IFlags & Flag))
1567 return MatchOperand_NoMatch;
1572 Parser.Lex(); // Eat identifier token.
1573 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1574 return MatchOperand_Success;
1577 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1578 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1579 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1580 SMLoc S = Parser.getTok().getLoc();
1581 const AsmToken &Tok = Parser.getTok();
1582 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1583 StringRef Mask = Tok.getString();
1585 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1586 size_t Start = 0, Next = Mask.find('_');
1587 StringRef Flags = "";
1588 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1589 if (Next != StringRef::npos)
1590 Flags = Mask.slice(Next+1, Mask.size());
1592 // FlagsVal contains the complete mask:
1594 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1595 unsigned FlagsVal = 0;
1597 if (SpecReg == "apsr") {
1598 FlagsVal = StringSwitch<unsigned>(Flags)
1599 .Case("nzcvq", 0x8) // same as CPSR_f
1600 .Case("g", 0x4) // same as CPSR_s
1601 .Case("nzcvqg", 0xc) // same as CPSR_fs
1604 if (FlagsVal == ~0U) {
1606 return MatchOperand_NoMatch;
1608 FlagsVal = 0; // No flag
1610 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1611 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1613 for (int i = 0, e = Flags.size(); i != e; ++i) {
1614 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1621 // If some specific flag is already set, it means that some letter is
1622 // present more than once, this is not acceptable.
1623 if (FlagsVal == ~0U || (FlagsVal & Flag))
1624 return MatchOperand_NoMatch;
1627 } else // No match for special register.
1628 return MatchOperand_NoMatch;
1630 // Special register without flags are equivalent to "fc" flags.
1634 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1635 if (SpecReg == "spsr")
1638 Parser.Lex(); // Eat identifier token.
1639 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1640 return MatchOperand_Success;
1643 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1644 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1645 int Low, int High) {
1646 const AsmToken &Tok = Parser.getTok();
1647 if (Tok.isNot(AsmToken::Identifier)) {
1648 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1649 return MatchOperand_ParseFail;
1651 StringRef ShiftName = Tok.getString();
1652 std::string LowerOp = LowercaseString(Op);
1653 std::string UpperOp = UppercaseString(Op);
1654 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1655 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1656 return MatchOperand_ParseFail;
1658 Parser.Lex(); // Eat shift type token.
1660 // There must be a '#' and a shift amount.
1661 if (Parser.getTok().isNot(AsmToken::Hash)) {
1662 Error(Parser.getTok().getLoc(), "'#' expected");
1663 return MatchOperand_ParseFail;
1665 Parser.Lex(); // Eat hash token.
1667 const MCExpr *ShiftAmount;
1668 SMLoc Loc = Parser.getTok().getLoc();
1669 if (getParser().ParseExpression(ShiftAmount)) {
1670 Error(Loc, "illegal expression");
1671 return MatchOperand_ParseFail;
1673 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1675 Error(Loc, "constant expression expected");
1676 return MatchOperand_ParseFail;
1678 int Val = CE->getValue();
1679 if (Val < Low || Val > High) {
1680 Error(Loc, "immediate value out of range");
1681 return MatchOperand_ParseFail;
1684 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1686 return MatchOperand_Success;
1689 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1690 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1691 const AsmToken &Tok = Parser.getTok();
1692 SMLoc S = Tok.getLoc();
1693 if (Tok.isNot(AsmToken::Identifier)) {
1694 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1695 return MatchOperand_ParseFail;
1697 int Val = StringSwitch<int>(Tok.getString())
1701 Parser.Lex(); // Eat the token.
1704 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1705 return MatchOperand_ParseFail;
1707 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1709 S, Parser.getTok().getLoc()));
1710 return MatchOperand_Success;
1713 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1714 /// instructions. Legal values are:
1715 /// lsl #n 'n' in [0,31]
1716 /// asr #n 'n' in [1,32]
1717 /// n == 32 encoded as n == 0.
1718 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1719 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1720 const AsmToken &Tok = Parser.getTok();
1721 SMLoc S = Tok.getLoc();
1722 if (Tok.isNot(AsmToken::Identifier)) {
1723 Error(S, "shift operator 'asr' or 'lsl' expected");
1724 return MatchOperand_ParseFail;
1726 StringRef ShiftName = Tok.getString();
1728 if (ShiftName == "lsl" || ShiftName == "LSL")
1730 else if (ShiftName == "asr" || ShiftName == "ASR")
1733 Error(S, "shift operator 'asr' or 'lsl' expected");
1734 return MatchOperand_ParseFail;
1736 Parser.Lex(); // Eat the operator.
1738 // A '#' and a shift amount.
1739 if (Parser.getTok().isNot(AsmToken::Hash)) {
1740 Error(Parser.getTok().getLoc(), "'#' expected");
1741 return MatchOperand_ParseFail;
1743 Parser.Lex(); // Eat hash token.
1745 const MCExpr *ShiftAmount;
1746 SMLoc E = Parser.getTok().getLoc();
1747 if (getParser().ParseExpression(ShiftAmount)) {
1748 Error(E, "malformed shift expression");
1749 return MatchOperand_ParseFail;
1751 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1753 Error(E, "shift amount must be an immediate");
1754 return MatchOperand_ParseFail;
1757 int64_t Val = CE->getValue();
1759 // Shift amount must be in [1,32]
1760 if (Val < 1 || Val > 32) {
1761 Error(E, "'asr' shift amount must be in range [1,32]");
1762 return MatchOperand_ParseFail;
1764 // asr #32 encoded as asr #0.
1765 if (Val == 32) Val = 0;
1767 // Shift amount must be in [1,32]
1768 if (Val < 0 || Val > 31) {
1769 Error(E, "'lsr' shift amount must be in range [0,31]");
1770 return MatchOperand_ParseFail;
1774 E = Parser.getTok().getLoc();
1775 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1777 return MatchOperand_Success;
1780 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1781 /// of instructions. Legal values are:
1782 /// ror #n 'n' in {0, 8, 16, 24}
1783 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1784 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1785 const AsmToken &Tok = Parser.getTok();
1786 SMLoc S = Tok.getLoc();
1787 if (Tok.isNot(AsmToken::Identifier)) {
1788 Error(S, "rotate operator 'ror' expected");
1789 return MatchOperand_ParseFail;
1791 StringRef ShiftName = Tok.getString();
1792 if (ShiftName != "ror" && ShiftName != "ROR") {
1793 Error(S, "rotate operator 'ror' expected");
1794 return MatchOperand_ParseFail;
1796 Parser.Lex(); // Eat the operator.
1798 // A '#' and a rotate amount.
1799 if (Parser.getTok().isNot(AsmToken::Hash)) {
1800 Error(Parser.getTok().getLoc(), "'#' expected");
1801 return MatchOperand_ParseFail;
1803 Parser.Lex(); // Eat hash token.
1805 const MCExpr *ShiftAmount;
1806 SMLoc E = Parser.getTok().getLoc();
1807 if (getParser().ParseExpression(ShiftAmount)) {
1808 Error(E, "malformed rotate expression");
1809 return MatchOperand_ParseFail;
1811 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1813 Error(E, "rotate amount must be an immediate");
1814 return MatchOperand_ParseFail;
1817 int64_t Val = CE->getValue();
1818 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1819 // normally, zero is represented in asm by omitting the rotate operand
1821 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1822 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1823 return MatchOperand_ParseFail;
1826 E = Parser.getTok().getLoc();
1827 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1829 return MatchOperand_Success;
1832 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1833 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1834 SMLoc S = Parser.getTok().getLoc();
1835 // The bitfield descriptor is really two operands, the LSB and the width.
1836 if (Parser.getTok().isNot(AsmToken::Hash)) {
1837 Error(Parser.getTok().getLoc(), "'#' expected");
1838 return MatchOperand_ParseFail;
1840 Parser.Lex(); // Eat hash token.
1842 const MCExpr *LSBExpr;
1843 SMLoc E = Parser.getTok().getLoc();
1844 if (getParser().ParseExpression(LSBExpr)) {
1845 Error(E, "malformed immediate expression");
1846 return MatchOperand_ParseFail;
1848 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
1850 Error(E, "'lsb' operand must be an immediate");
1851 return MatchOperand_ParseFail;
1854 int64_t LSB = CE->getValue();
1855 // The LSB must be in the range [0,31]
1856 if (LSB < 0 || LSB > 31) {
1857 Error(E, "'lsb' operand must be in the range [0,31]");
1858 return MatchOperand_ParseFail;
1860 E = Parser.getTok().getLoc();
1862 // Expect another immediate operand.
1863 if (Parser.getTok().isNot(AsmToken::Comma)) {
1864 Error(Parser.getTok().getLoc(), "too few operands");
1865 return MatchOperand_ParseFail;
1867 Parser.Lex(); // Eat hash token.
1868 if (Parser.getTok().isNot(AsmToken::Hash)) {
1869 Error(Parser.getTok().getLoc(), "'#' expected");
1870 return MatchOperand_ParseFail;
1872 Parser.Lex(); // Eat hash token.
1874 const MCExpr *WidthExpr;
1875 if (getParser().ParseExpression(WidthExpr)) {
1876 Error(E, "malformed immediate expression");
1877 return MatchOperand_ParseFail;
1879 CE = dyn_cast<MCConstantExpr>(WidthExpr);
1881 Error(E, "'width' operand must be an immediate");
1882 return MatchOperand_ParseFail;
1885 int64_t Width = CE->getValue();
1886 // The LSB must be in the range [1,32-lsb]
1887 if (Width < 1 || Width > 32 - LSB) {
1888 Error(E, "'width' operand must be in the range [1,32-lsb]");
1889 return MatchOperand_ParseFail;
1891 E = Parser.getTok().getLoc();
1893 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
1895 return MatchOperand_Success;
1898 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1899 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1900 // Check for a post-index addressing register operand. Specifically:
1901 // postidx_reg := '+' register {, shift}
1902 // | '-' register {, shift}
1903 // | register {, shift}
1905 // This method must return MatchOperand_NoMatch without consuming any tokens
1906 // in the case where there is no match, as other alternatives take other
1908 AsmToken Tok = Parser.getTok();
1909 SMLoc S = Tok.getLoc();
1910 bool haveEaten = false;
1913 if (Tok.is(AsmToken::Plus)) {
1914 Parser.Lex(); // Eat the '+' token.
1916 } else if (Tok.is(AsmToken::Minus)) {
1917 Parser.Lex(); // Eat the '-' token.
1921 if (Parser.getTok().is(AsmToken::Identifier))
1922 Reg = tryParseRegister();
1925 return MatchOperand_NoMatch;
1926 Error(Parser.getTok().getLoc(), "register expected");
1927 return MatchOperand_ParseFail;
1929 SMLoc E = Parser.getTok().getLoc();
1931 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
1932 unsigned ShiftImm = 0;
1933 if (Parser.getTok().is(AsmToken::Comma)) {
1934 Parser.Lex(); // Eat the ','.
1935 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
1936 return MatchOperand_ParseFail;
1939 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
1942 return MatchOperand_Success;
1945 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1946 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1947 /// when they refer multiple MIOperands inside a single one.
1949 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1950 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1951 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1953 // Create a writeback register dummy placeholder.
1954 Inst.addOperand(MCOperand::CreateImm(0));
1956 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
1957 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1961 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1962 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1963 /// when they refer multiple MIOperands inside a single one.
1965 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1966 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1967 // Create a writeback register dummy placeholder.
1968 Inst.addOperand(MCOperand::CreateImm(0));
1969 assert(0 && "cvtStWriteBackRegAddrMode2 not implemented yet!");
1973 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
1974 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1975 /// when they refer multiple MIOperands inside a single one.
1977 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
1978 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1980 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1981 // Create a writeback register dummy placeholder.
1982 Inst.addOperand(MCOperand::CreateImm(0));
1984 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
1986 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
1988 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1992 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
1993 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1994 /// when they refer multiple MIOperands inside a single one.
1996 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
1997 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1999 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2000 // Create a writeback register dummy placeholder.
2001 Inst.addOperand(MCOperand::CreateImm(0));
2003 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2005 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2007 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2011 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2012 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2013 /// when they refer multiple MIOperands inside a single one.
2015 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2016 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2017 // Create a writeback register dummy placeholder.
2018 Inst.addOperand(MCOperand::CreateImm(0));
2020 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2022 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2024 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2026 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2030 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2031 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2032 /// when they refer multiple MIOperands inside a single one.
2034 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2035 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2036 // Create a writeback register dummy placeholder.
2037 Inst.addOperand(MCOperand::CreateImm(0));
2039 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2041 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2043 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2045 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2049 /// Parse an ARM memory expression, return false if successful else return true
2050 /// or an error. The first token must be a '[' when called.
2052 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2054 assert(Parser.getTok().is(AsmToken::LBrac) &&
2055 "Token is not a Left Bracket");
2056 S = Parser.getTok().getLoc();
2057 Parser.Lex(); // Eat left bracket token.
2059 const AsmToken &BaseRegTok = Parser.getTok();
2060 int BaseRegNum = tryParseRegister();
2061 if (BaseRegNum == -1)
2062 return Error(BaseRegTok.getLoc(), "register expected");
2064 // The next token must either be a comma or a closing bracket.
2065 const AsmToken &Tok = Parser.getTok();
2066 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2067 return Error(Tok.getLoc(), "malformed memory operand");
2069 if (Tok.is(AsmToken::RBrac)) {
2071 Parser.Lex(); // Eat right bracket token.
2073 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2079 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2080 Parser.Lex(); // Eat the comma.
2082 // If we have a '#' it's an immediate offset, else assume it's a register
2084 if (Parser.getTok().is(AsmToken::Hash)) {
2085 Parser.Lex(); // Eat the '#'.
2086 E = Parser.getTok().getLoc();
2088 // FIXME: Special case #-0 so we can correctly set the U bit.
2090 const MCExpr *Offset;
2091 if (getParser().ParseExpression(Offset))
2094 // The expression has to be a constant. Memory references with relocations
2095 // don't come through here, as they use the <label> forms of the relevant
2097 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2099 return Error (E, "constant expression expected");
2101 // Now we should have the closing ']'
2102 E = Parser.getTok().getLoc();
2103 if (Parser.getTok().isNot(AsmToken::RBrac))
2104 return Error(E, "']' expected");
2105 Parser.Lex(); // Eat right bracket token.
2107 // Don't worry about range checking the value here. That's handled by
2108 // the is*() predicates.
2109 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2110 ARM_AM::no_shift, 0, false, S,E));
2112 // If there's a pre-indexing writeback marker, '!', just add it as a token
2114 if (Parser.getTok().is(AsmToken::Exclaim)) {
2115 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2116 Parser.Lex(); // Eat the '!'.
2122 // The register offset is optionally preceded by a '+' or '-'
2123 bool isNegative = false;
2124 if (Parser.getTok().is(AsmToken::Minus)) {
2126 Parser.Lex(); // Eat the '-'.
2127 } else if (Parser.getTok().is(AsmToken::Plus)) {
2129 Parser.Lex(); // Eat the '+'.
2132 E = Parser.getTok().getLoc();
2133 int OffsetRegNum = tryParseRegister();
2134 if (OffsetRegNum == -1)
2135 return Error(E, "register expected");
2137 // If there's a shift operator, handle it.
2138 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2139 unsigned ShiftImm = 0;
2140 if (Parser.getTok().is(AsmToken::Comma)) {
2141 Parser.Lex(); // Eat the ','.
2142 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2146 // Now we should have the closing ']'
2147 E = Parser.getTok().getLoc();
2148 if (Parser.getTok().isNot(AsmToken::RBrac))
2149 return Error(E, "']' expected");
2150 Parser.Lex(); // Eat right bracket token.
2152 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2153 ShiftType, ShiftImm, isNegative,
2156 // If there's a pre-indexing writeback marker, '!', just add it as a token
2158 if (Parser.getTok().is(AsmToken::Exclaim)) {
2159 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2160 Parser.Lex(); // Eat the '!'.
2166 /// parseMemRegOffsetShift - one of these two:
2167 /// ( lsl | lsr | asr | ror ) , # shift_amount
2169 /// return true if it parses a shift otherwise it returns false.
2170 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2172 SMLoc Loc = Parser.getTok().getLoc();
2173 const AsmToken &Tok = Parser.getTok();
2174 if (Tok.isNot(AsmToken::Identifier))
2176 StringRef ShiftName = Tok.getString();
2177 if (ShiftName == "lsl" || ShiftName == "LSL")
2179 else if (ShiftName == "lsr" || ShiftName == "LSR")
2181 else if (ShiftName == "asr" || ShiftName == "ASR")
2183 else if (ShiftName == "ror" || ShiftName == "ROR")
2185 else if (ShiftName == "rrx" || ShiftName == "RRX")
2188 return Error(Loc, "illegal shift operator");
2189 Parser.Lex(); // Eat shift type token.
2191 // rrx stands alone.
2193 if (St != ARM_AM::rrx) {
2194 Loc = Parser.getTok().getLoc();
2195 // A '#' and a shift amount.
2196 const AsmToken &HashTok = Parser.getTok();
2197 if (HashTok.isNot(AsmToken::Hash))
2198 return Error(HashTok.getLoc(), "'#' expected");
2199 Parser.Lex(); // Eat hash token.
2202 if (getParser().ParseExpression(Expr))
2204 // Range check the immediate.
2205 // lsl, ror: 0 <= imm <= 31
2206 // lsr, asr: 0 <= imm <= 32
2207 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2209 return Error(Loc, "shift amount must be an immediate");
2210 int64_t Imm = CE->getValue();
2212 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2213 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2214 return Error(Loc, "immediate shift value out of range");
2221 /// Parse a arm instruction operand. For now this parses the operand regardless
2222 /// of the mnemonic.
2223 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2224 StringRef Mnemonic) {
2227 // Check if the current operand has a custom associated parser, if so, try to
2228 // custom parse the operand, or fallback to the general approach.
2229 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2230 if (ResTy == MatchOperand_Success)
2232 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2233 // there was a match, but an error occurred, in which case, just return that
2234 // the operand parsing failed.
2235 if (ResTy == MatchOperand_ParseFail)
2238 switch (getLexer().getKind()) {
2240 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2242 case AsmToken::Identifier: {
2243 if (!tryParseRegisterWithWriteBack(Operands))
2245 int Res = tryParseShiftRegister(Operands);
2246 if (Res == 0) // success
2248 else if (Res == -1) // irrecoverable error
2251 // Fall though for the Identifier case that is not a register or a
2254 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2255 case AsmToken::Dot: { // . as a branch target
2256 // This was not a register so parse other operands that start with an
2257 // identifier (like labels) as expressions and create them as immediates.
2258 const MCExpr *IdVal;
2259 S = Parser.getTok().getLoc();
2260 if (getParser().ParseExpression(IdVal))
2262 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2263 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2266 case AsmToken::LBrac:
2267 return parseMemory(Operands);
2268 case AsmToken::LCurly:
2269 return parseRegisterList(Operands);
2270 case AsmToken::Hash:
2271 // #42 -> immediate.
2272 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2273 S = Parser.getTok().getLoc();
2275 const MCExpr *ImmVal;
2276 if (getParser().ParseExpression(ImmVal))
2278 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2279 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2281 case AsmToken::Colon: {
2282 // ":lower16:" and ":upper16:" expression prefixes
2283 // FIXME: Check it's an expression prefix,
2284 // e.g. (FOO - :lower16:BAR) isn't legal.
2285 ARMMCExpr::VariantKind RefKind;
2286 if (parsePrefix(RefKind))
2289 const MCExpr *SubExprVal;
2290 if (getParser().ParseExpression(SubExprVal))
2293 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2295 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2296 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2302 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2303 // :lower16: and :upper16:.
2304 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2305 RefKind = ARMMCExpr::VK_ARM_None;
2307 // :lower16: and :upper16: modifiers
2308 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2309 Parser.Lex(); // Eat ':'
2311 if (getLexer().isNot(AsmToken::Identifier)) {
2312 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2316 StringRef IDVal = Parser.getTok().getIdentifier();
2317 if (IDVal == "lower16") {
2318 RefKind = ARMMCExpr::VK_ARM_LO16;
2319 } else if (IDVal == "upper16") {
2320 RefKind = ARMMCExpr::VK_ARM_HI16;
2322 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2327 if (getLexer().isNot(AsmToken::Colon)) {
2328 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2331 Parser.Lex(); // Eat the last ':'
2336 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2337 MCSymbolRefExpr::VariantKind Variant) {
2338 // Recurse over the given expression, rebuilding it to apply the given variant
2339 // to the leftmost symbol.
2340 if (Variant == MCSymbolRefExpr::VK_None)
2343 switch (E->getKind()) {
2344 case MCExpr::Target:
2345 llvm_unreachable("Can't handle target expr yet");
2346 case MCExpr::Constant:
2347 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2349 case MCExpr::SymbolRef: {
2350 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2352 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2355 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2359 llvm_unreachable("Can't handle unary expressions yet");
2361 case MCExpr::Binary: {
2362 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2363 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2364 const MCExpr *RHS = BE->getRHS();
2368 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2372 assert(0 && "Invalid expression kind!");
2376 /// \brief Given a mnemonic, split out possible predication code and carry
2377 /// setting letters to form a canonical mnemonic and flags.
2379 // FIXME: Would be nice to autogen this.
2380 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2381 unsigned &PredicationCode,
2383 unsigned &ProcessorIMod) {
2384 PredicationCode = ARMCC::AL;
2385 CarrySetting = false;
2388 // Ignore some mnemonics we know aren't predicated forms.
2390 // FIXME: Would be nice to autogen this.
2391 if ((Mnemonic == "movs" && isThumb()) ||
2392 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2393 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2394 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2395 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2396 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2397 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2398 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2401 // First, split out any predication code. Ignore mnemonics we know aren't
2402 // predicated but do have a carry-set and so weren't caught above.
2403 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2404 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2405 Mnemonic != "umlals" && Mnemonic != "umulls") {
2406 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2407 .Case("eq", ARMCC::EQ)
2408 .Case("ne", ARMCC::NE)
2409 .Case("hs", ARMCC::HS)
2410 .Case("cs", ARMCC::HS)
2411 .Case("lo", ARMCC::LO)
2412 .Case("cc", ARMCC::LO)
2413 .Case("mi", ARMCC::MI)
2414 .Case("pl", ARMCC::PL)
2415 .Case("vs", ARMCC::VS)
2416 .Case("vc", ARMCC::VC)
2417 .Case("hi", ARMCC::HI)
2418 .Case("ls", ARMCC::LS)
2419 .Case("ge", ARMCC::GE)
2420 .Case("lt", ARMCC::LT)
2421 .Case("gt", ARMCC::GT)
2422 .Case("le", ARMCC::LE)
2423 .Case("al", ARMCC::AL)
2426 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2427 PredicationCode = CC;
2431 // Next, determine if we have a carry setting bit. We explicitly ignore all
2432 // the instructions we know end in 's'.
2433 if (Mnemonic.endswith("s") &&
2434 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
2435 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2436 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2437 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2438 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2439 (Mnemonic == "movs" && isThumb()))) {
2440 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2441 CarrySetting = true;
2444 // The "cps" instruction can have a interrupt mode operand which is glued into
2445 // the mnemonic. Check if this is the case, split it and parse the imod op
2446 if (Mnemonic.startswith("cps")) {
2447 // Split out any imod code.
2449 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2450 .Case("ie", ARM_PROC::IE)
2451 .Case("id", ARM_PROC::ID)
2454 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2455 ProcessorIMod = IMod;
2462 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2463 /// inclusion of carry set or predication code operands.
2465 // FIXME: It would be nice to autogen this.
2467 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2468 bool &CanAcceptPredicationCode) {
2469 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2470 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2471 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2472 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2473 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2474 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2475 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2476 Mnemonic == "eor" || Mnemonic == "smlal" ||
2477 (Mnemonic == "mov" && !isThumbOne())) {
2478 CanAcceptCarrySet = true;
2480 CanAcceptCarrySet = false;
2483 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2484 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2485 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2486 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2487 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2488 Mnemonic == "setend" ||
2489 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2490 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2492 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2493 CanAcceptPredicationCode = false;
2495 CanAcceptPredicationCode = true;
2499 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2500 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2501 CanAcceptPredicationCode = false;
2504 /// Parse an arm instruction mnemonic followed by its operands.
2505 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2506 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2507 // Create the leading tokens for the mnemonic, split by '.' characters.
2508 size_t Start = 0, Next = Name.find('.');
2509 StringRef Mnemonic = Name.slice(Start, Next);
2511 // Split out the predication code and carry setting flag from the mnemonic.
2512 unsigned PredicationCode;
2513 unsigned ProcessorIMod;
2515 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2518 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2520 // FIXME: This is all a pretty gross hack. We should automatically handle
2521 // optional operands like this via tblgen.
2523 // Next, add the CCOut and ConditionCode operands, if needed.
2525 // For mnemonics which can ever incorporate a carry setting bit or predication
2526 // code, our matching model involves us always generating CCOut and
2527 // ConditionCode operands to match the mnemonic "as written" and then we let
2528 // the matcher deal with finding the right instruction or generating an
2529 // appropriate error.
2530 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2531 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2533 // If we had a carry-set on an instruction that can't do that, issue an
2535 if (!CanAcceptCarrySet && CarrySetting) {
2536 Parser.EatToEndOfStatement();
2537 return Error(NameLoc, "instruction '" + Mnemonic +
2538 "' can not set flags, but 's' suffix specified");
2540 // If we had a predication code on an instruction that can't do that, issue an
2542 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2543 Parser.EatToEndOfStatement();
2544 return Error(NameLoc, "instruction '" + Mnemonic +
2545 "' is not predicable, but condition code specified");
2548 // Add the carry setting operand, if necessary.
2550 // FIXME: It would be awesome if we could somehow invent a location such that
2551 // match errors on this operand would print a nice diagnostic about how the
2552 // 's' character in the mnemonic resulted in a CCOut operand.
2553 if (CanAcceptCarrySet)
2554 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2557 // Add the predication code operand, if necessary.
2558 if (CanAcceptPredicationCode) {
2559 Operands.push_back(ARMOperand::CreateCondCode(
2560 ARMCC::CondCodes(PredicationCode), NameLoc));
2563 // Add the processor imod operand, if necessary.
2564 if (ProcessorIMod) {
2565 Operands.push_back(ARMOperand::CreateImm(
2566 MCConstantExpr::Create(ProcessorIMod, getContext()),
2569 // This mnemonic can't ever accept a imod, but the user wrote
2570 // one (or misspelled another mnemonic).
2572 // FIXME: Issue a nice error.
2575 // Add the remaining tokens in the mnemonic.
2576 while (Next != StringRef::npos) {
2578 Next = Name.find('.', Start + 1);
2579 StringRef ExtraToken = Name.slice(Start, Next);
2581 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2584 // Read the remaining operands.
2585 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2586 // Read the first operand.
2587 if (parseOperand(Operands, Mnemonic)) {
2588 Parser.EatToEndOfStatement();
2592 while (getLexer().is(AsmToken::Comma)) {
2593 Parser.Lex(); // Eat the comma.
2595 // Parse and remember the operand.
2596 if (parseOperand(Operands, Mnemonic)) {
2597 Parser.EatToEndOfStatement();
2603 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2604 Parser.EatToEndOfStatement();
2605 return TokError("unexpected token in argument list");
2608 Parser.Lex(); // Consume the EndOfStatement
2611 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2612 // another does not. Specifically, the MOVW instruction does not. So we
2613 // special case it here and remove the defaulted (non-setting) cc_out
2614 // operand if that's the instruction we're trying to match.
2616 // We do this post-processing of the explicit operands rather than just
2617 // conditionally adding the cc_out in the first place because we need
2618 // to check the type of the parsed immediate operand.
2619 if (Mnemonic == "mov" && Operands.size() > 4 &&
2620 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2621 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2622 static_cast<ARMOperand*>(Operands[1])->getReg() == 0) {
2623 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2624 Operands.erase(Operands.begin() + 1);
2628 // ARM mode 'blx' need special handling, as the register operand version
2629 // is predicable, but the label operand version is not. So, we can't rely
2630 // on the Mnemonic based checking to correctly figure out when to put
2631 // a CondCode operand in the list. If we're trying to match the label
2632 // version, remove the CondCode operand here.
2633 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2634 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2635 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2636 Operands.erase(Operands.begin() + 1);
2642 // Validate context-sensitive operand constraints.
2643 // FIXME: We would really like to be able to tablegen'erate this.
2645 validateInstruction(MCInst &Inst,
2646 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2647 switch (Inst.getOpcode()) {
2649 // Rt2 must be Rt + 1.
2650 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2651 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2653 return Error(Operands[3]->getStartLoc(),
2654 "destination operands must be sequential");
2658 // Rt2 must be Rt + 1.
2659 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2660 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
2662 return Error(Operands[4]->getStartLoc(),
2663 "source operands must be sequential");
2668 // width must be in range [1, 32-lsb]
2669 unsigned lsb = Inst.getOperand(2).getImm();
2670 unsigned widthm1 = Inst.getOperand(3).getImm();
2671 if (widthm1 >= 32 - lsb)
2672 return Error(Operands[5]->getStartLoc(),
2673 "bitfield width must be in range [1,32-lsb]");
2681 MatchAndEmitInstruction(SMLoc IDLoc,
2682 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2686 MatchResultTy MatchResult;
2687 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2688 switch (MatchResult) {
2690 // Context sensitive operand constraints aren't handled by the matcher,
2691 // so check them here.
2692 if (validateInstruction(Inst, Operands))
2695 Out.EmitInstruction(Inst);
2697 case Match_MissingFeature:
2698 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2700 case Match_InvalidOperand: {
2701 SMLoc ErrorLoc = IDLoc;
2702 if (ErrorInfo != ~0U) {
2703 if (ErrorInfo >= Operands.size())
2704 return Error(IDLoc, "too few operands for instruction");
2706 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2707 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2710 return Error(ErrorLoc, "invalid operand for instruction");
2712 case Match_MnemonicFail:
2713 return Error(IDLoc, "unrecognized instruction mnemonic");
2714 case Match_ConversionFail:
2715 return Error(IDLoc, "unable to convert operands to instruction");
2718 llvm_unreachable("Implement any new match types added!");
2722 /// parseDirective parses the arm specific directives
2723 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2724 StringRef IDVal = DirectiveID.getIdentifier();
2725 if (IDVal == ".word")
2726 return parseDirectiveWord(4, DirectiveID.getLoc());
2727 else if (IDVal == ".thumb")
2728 return parseDirectiveThumb(DirectiveID.getLoc());
2729 else if (IDVal == ".thumb_func")
2730 return parseDirectiveThumbFunc(DirectiveID.getLoc());
2731 else if (IDVal == ".code")
2732 return parseDirectiveCode(DirectiveID.getLoc());
2733 else if (IDVal == ".syntax")
2734 return parseDirectiveSyntax(DirectiveID.getLoc());
2738 /// parseDirectiveWord
2739 /// ::= .word [ expression (, expression)* ]
2740 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
2741 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2743 const MCExpr *Value;
2744 if (getParser().ParseExpression(Value))
2747 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2749 if (getLexer().is(AsmToken::EndOfStatement))
2752 // FIXME: Improve diagnostic.
2753 if (getLexer().isNot(AsmToken::Comma))
2754 return Error(L, "unexpected token in directive");
2763 /// parseDirectiveThumb
2765 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
2766 if (getLexer().isNot(AsmToken::EndOfStatement))
2767 return Error(L, "unexpected token in directive");
2770 // TODO: set thumb mode
2771 // TODO: tell the MC streamer the mode
2772 // getParser().getStreamer().Emit???();
2776 /// parseDirectiveThumbFunc
2777 /// ::= .thumbfunc symbol_name
2778 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
2779 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
2780 bool isMachO = MAI.hasSubsectionsViaSymbols();
2783 // Darwin asm has function name after .thumb_func direction
2786 const AsmToken &Tok = Parser.getTok();
2787 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
2788 return Error(L, "unexpected token in .thumb_func directive");
2789 Name = Tok.getString();
2790 Parser.Lex(); // Consume the identifier token.
2793 if (getLexer().isNot(AsmToken::EndOfStatement))
2794 return Error(L, "unexpected token in directive");
2797 // FIXME: assuming function name will be the line following .thumb_func
2799 Name = Parser.getTok().getString();
2802 // Mark symbol as a thumb symbol.
2803 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
2804 getParser().getStreamer().EmitThumbFunc(Func);
2808 /// parseDirectiveSyntax
2809 /// ::= .syntax unified | divided
2810 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
2811 const AsmToken &Tok = Parser.getTok();
2812 if (Tok.isNot(AsmToken::Identifier))
2813 return Error(L, "unexpected token in .syntax directive");
2814 StringRef Mode = Tok.getString();
2815 if (Mode == "unified" || Mode == "UNIFIED")
2817 else if (Mode == "divided" || Mode == "DIVIDED")
2818 return Error(L, "'.syntax divided' arm asssembly not supported");
2820 return Error(L, "unrecognized syntax mode in .syntax directive");
2822 if (getLexer().isNot(AsmToken::EndOfStatement))
2823 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2826 // TODO tell the MC streamer the mode
2827 // getParser().getStreamer().Emit???();
2831 /// parseDirectiveCode
2832 /// ::= .code 16 | 32
2833 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
2834 const AsmToken &Tok = Parser.getTok();
2835 if (Tok.isNot(AsmToken::Integer))
2836 return Error(L, "unexpected token in .code directive");
2837 int64_t Val = Parser.getTok().getIntVal();
2843 return Error(L, "invalid operand to .code directive");
2845 if (getLexer().isNot(AsmToken::EndOfStatement))
2846 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2852 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
2857 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
2864 extern "C" void LLVMInitializeARMAsmLexer();
2866 /// Force static initialization.
2867 extern "C" void LLVMInitializeARMAsmParser() {
2868 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
2869 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
2870 LLVMInitializeARMAsmLexer();
2873 #define GET_REGISTER_MATCHER
2874 #define GET_MATCHER_IMPLEMENTATION
2875 #include "ARMGenAsmMatcher.inc"