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;
81 bool isThumbTwo() const {
82 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2);
84 bool hasV6Ops() const {
85 return STI.getFeatureBits() & ARM::HasV6Ops;
88 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
89 setAvailableFeatures(FB);
92 /// @name Auto-generated Match Functions
95 #define GET_ASSEMBLER_HEADER
96 #include "ARMGenAsmMatcher.inc"
100 OperandMatchResultTy parseCoprocNumOperand(
101 SmallVectorImpl<MCParsedAsmOperand*>&);
102 OperandMatchResultTy parseCoprocRegOperand(
103 SmallVectorImpl<MCParsedAsmOperand*>&);
104 OperandMatchResultTy parseMemBarrierOptOperand(
105 SmallVectorImpl<MCParsedAsmOperand*>&);
106 OperandMatchResultTy parseProcIFlagsOperand(
107 SmallVectorImpl<MCParsedAsmOperand*>&);
108 OperandMatchResultTy parseMSRMaskOperand(
109 SmallVectorImpl<MCParsedAsmOperand*>&);
110 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
111 StringRef Op, int Low, int High);
112 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
113 return parsePKHImm(O, "lsl", 0, 31);
115 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
116 return parsePKHImm(O, "asr", 1, 32);
118 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
119 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
120 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
121 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
122 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
123 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
125 // Asm Match Converter Methods
126 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
127 const SmallVectorImpl<MCParsedAsmOperand*> &);
128 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
129 const SmallVectorImpl<MCParsedAsmOperand*> &);
130 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
131 const SmallVectorImpl<MCParsedAsmOperand*> &);
132 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
133 const SmallVectorImpl<MCParsedAsmOperand*> &);
134 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
135 const SmallVectorImpl<MCParsedAsmOperand*> &);
136 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
137 const SmallVectorImpl<MCParsedAsmOperand*> &);
138 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
139 const SmallVectorImpl<MCParsedAsmOperand*> &);
140 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
141 const SmallVectorImpl<MCParsedAsmOperand*> &);
142 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
143 const SmallVectorImpl<MCParsedAsmOperand*> &);
144 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
145 const SmallVectorImpl<MCParsedAsmOperand*> &);
146 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
147 const SmallVectorImpl<MCParsedAsmOperand*> &);
149 bool validateInstruction(MCInst &Inst,
150 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
151 void processInstruction(MCInst &Inst,
152 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
153 bool shouldOmitCCOutOperand(StringRef Mnemonic,
154 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
157 enum ARMMatchResultTy {
158 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
163 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
164 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
165 MCAsmParserExtension::Initialize(_Parser);
167 // Initialize the set of available features.
168 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
171 // Implementation of the MCTargetAsmParser interface:
172 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
173 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
174 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
175 bool ParseDirective(AsmToken DirectiveID);
177 unsigned checkTargetMatchPredicate(MCInst &Inst);
179 bool MatchAndEmitInstruction(SMLoc IDLoc,
180 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
183 } // end anonymous namespace
187 /// ARMOperand - Instances of this class represent a parsed ARM machine
189 class ARMOperand : public MCParsedAsmOperand {
213 SMLoc StartLoc, EndLoc;
214 SmallVector<unsigned, 8> Registers;
218 ARMCC::CondCodes Val;
230 ARM_PROC::IFlags Val;
250 /// Combined record for all forms of ARM address expressions.
253 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
255 const MCConstantExpr *OffsetImm; // Offset immediate value
256 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
257 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
258 unsigned ShiftImm; // shift for OffsetReg.
259 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
265 ARM_AM::ShiftOpc ShiftTy;
274 ARM_AM::ShiftOpc ShiftTy;
280 ARM_AM::ShiftOpc ShiftTy;
293 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
295 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
297 StartLoc = o.StartLoc;
311 case DPRRegisterList:
312 case SPRRegisterList:
313 Registers = o.Registers;
328 case PostIndexRegister:
329 PostIdxReg = o.PostIdxReg;
337 case ShifterImmediate:
338 ShifterImm = o.ShifterImm;
340 case ShiftedRegister:
341 RegShiftedReg = o.RegShiftedReg;
343 case ShiftedImmediate:
344 RegShiftedImm = o.RegShiftedImm;
346 case RotateImmediate:
349 case BitfieldDescriptor:
350 Bitfield = o.Bitfield;
355 /// getStartLoc - Get the location of the first token of this operand.
356 SMLoc getStartLoc() const { return StartLoc; }
357 /// getEndLoc - Get the location of the last token of this operand.
358 SMLoc getEndLoc() const { return EndLoc; }
360 ARMCC::CondCodes getCondCode() const {
361 assert(Kind == CondCode && "Invalid access!");
365 unsigned getCoproc() const {
366 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
370 StringRef getToken() const {
371 assert(Kind == Token && "Invalid access!");
372 return StringRef(Tok.Data, Tok.Length);
375 unsigned getReg() const {
376 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
380 const SmallVectorImpl<unsigned> &getRegList() const {
381 assert((Kind == RegisterList || Kind == DPRRegisterList ||
382 Kind == SPRRegisterList) && "Invalid access!");
386 const MCExpr *getImm() const {
387 assert(Kind == Immediate && "Invalid access!");
391 ARM_MB::MemBOpt getMemBarrierOpt() const {
392 assert(Kind == MemBarrierOpt && "Invalid access!");
396 ARM_PROC::IFlags getProcIFlags() const {
397 assert(Kind == ProcIFlags && "Invalid access!");
401 unsigned getMSRMask() const {
402 assert(Kind == MSRMask && "Invalid access!");
406 bool isCoprocNum() const { return Kind == CoprocNum; }
407 bool isCoprocReg() const { return Kind == CoprocReg; }
408 bool isCondCode() const { return Kind == CondCode; }
409 bool isCCOut() const { return Kind == CCOut; }
410 bool isImm() const { return Kind == Immediate; }
411 bool isImm0_255() const {
412 if (Kind != Immediate)
414 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
415 if (!CE) return false;
416 int64_t Value = CE->getValue();
417 return Value >= 0 && Value < 256;
419 bool isImm0_7() const {
420 if (Kind != Immediate)
422 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
423 if (!CE) return false;
424 int64_t Value = CE->getValue();
425 return Value >= 0 && Value < 8;
427 bool isImm0_15() const {
428 if (Kind != Immediate)
430 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
431 if (!CE) return false;
432 int64_t Value = CE->getValue();
433 return Value >= 0 && Value < 16;
435 bool isImm0_31() const {
436 if (Kind != Immediate)
438 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
439 if (!CE) return false;
440 int64_t Value = CE->getValue();
441 return Value >= 0 && Value < 32;
443 bool isImm1_16() const {
444 if (Kind != Immediate)
446 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
447 if (!CE) return false;
448 int64_t Value = CE->getValue();
449 return Value > 0 && Value < 17;
451 bool isImm1_32() const {
452 if (Kind != Immediate)
454 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
455 if (!CE) return false;
456 int64_t Value = CE->getValue();
457 return Value > 0 && Value < 33;
459 bool isImm0_65535() const {
460 if (Kind != Immediate)
462 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
463 if (!CE) return false;
464 int64_t Value = CE->getValue();
465 return Value >= 0 && Value < 65536;
467 bool isImm0_65535Expr() const {
468 if (Kind != Immediate)
470 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
471 // If it's not a constant expression, it'll generate a fixup and be
473 if (!CE) return true;
474 int64_t Value = CE->getValue();
475 return Value >= 0 && Value < 65536;
477 bool isImm24bit() const {
478 if (Kind != Immediate)
480 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
481 if (!CE) return false;
482 int64_t Value = CE->getValue();
483 return Value >= 0 && Value <= 0xffffff;
485 bool isImmThumbSR() const {
486 if (Kind != Immediate)
488 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
489 if (!CE) return false;
490 int64_t Value = CE->getValue();
491 return Value > 0 && Value < 33;
493 bool isPKHLSLImm() const {
494 if (Kind != Immediate)
496 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
497 if (!CE) return false;
498 int64_t Value = CE->getValue();
499 return Value >= 0 && Value < 32;
501 bool isPKHASRImm() const {
502 if (Kind != Immediate)
504 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
505 if (!CE) return false;
506 int64_t Value = CE->getValue();
507 return Value > 0 && Value <= 32;
509 bool isARMSOImm() const {
510 if (Kind != Immediate)
512 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
513 if (!CE) return false;
514 int64_t Value = CE->getValue();
515 return ARM_AM::getSOImmVal(Value) != -1;
517 bool isT2SOImm() const {
518 if (Kind != Immediate)
520 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
521 if (!CE) return false;
522 int64_t Value = CE->getValue();
523 return ARM_AM::getT2SOImmVal(Value) != -1;
525 bool isSetEndImm() const {
526 if (Kind != Immediate)
528 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
529 if (!CE) return false;
530 int64_t Value = CE->getValue();
531 return Value == 1 || Value == 0;
533 bool isReg() const { return Kind == Register; }
534 bool isRegList() const { return Kind == RegisterList; }
535 bool isDPRRegList() const { return Kind == DPRRegisterList; }
536 bool isSPRRegList() const { return Kind == SPRRegisterList; }
537 bool isToken() const { return Kind == Token; }
538 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
539 bool isMemory() const { return Kind == Memory; }
540 bool isShifterImm() const { return Kind == ShifterImmediate; }
541 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
542 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
543 bool isRotImm() const { return Kind == RotateImmediate; }
544 bool isBitfield() const { return Kind == BitfieldDescriptor; }
545 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
546 bool isPostIdxReg() const {
547 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
549 bool isMemNoOffset() const {
552 // No offset of any kind.
553 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
555 bool isAddrMode2() const {
558 // Check for register offset.
559 if (Mem.OffsetRegNum) return true;
560 // Immediate offset in range [-4095, 4095].
561 if (!Mem.OffsetImm) return true;
562 int64_t Val = Mem.OffsetImm->getValue();
563 return Val > -4096 && Val < 4096;
565 bool isAM2OffsetImm() const {
566 if (Kind != Immediate)
568 // Immediate offset in range [-4095, 4095].
569 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
570 if (!CE) return false;
571 int64_t Val = CE->getValue();
572 return Val > -4096 && Val < 4096;
574 bool isAddrMode3() const {
577 // No shifts are legal for AM3.
578 if (Mem.ShiftType != ARM_AM::no_shift) return false;
579 // Check for register offset.
580 if (Mem.OffsetRegNum) return true;
581 // Immediate offset in range [-255, 255].
582 if (!Mem.OffsetImm) return true;
583 int64_t Val = Mem.OffsetImm->getValue();
584 return Val > -256 && Val < 256;
586 bool isAM3Offset() const {
587 if (Kind != Immediate && Kind != PostIndexRegister)
589 if (Kind == PostIndexRegister)
590 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
591 // Immediate offset in range [-255, 255].
592 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
593 if (!CE) return false;
594 int64_t Val = CE->getValue();
595 // Special case, #-0 is INT32_MIN.
596 return (Val > -256 && Val < 256) || Val == INT32_MIN;
598 bool isAddrMode5() const {
601 // Check for register offset.
602 if (Mem.OffsetRegNum) return false;
603 // Immediate offset in range [-1020, 1020] and a multiple of 4.
604 if (!Mem.OffsetImm) return true;
605 int64_t Val = Mem.OffsetImm->getValue();
606 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
608 bool isMemRegOffset() const {
609 if (Kind != Memory || !Mem.OffsetRegNum)
613 bool isMemThumbRR() const {
614 // Thumb reg+reg addressing is simple. Just two registers, a base and
615 // an offset. No shifts, negations or any other complicating factors.
616 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
617 Mem.ShiftType != ARM_AM::no_shift)
619 return isARMLowRegister(Mem.BaseRegNum) &&
620 (!Mem.OffsetRegNum || isARMLowRegister(Mem.OffsetRegNum));
622 bool isMemThumbRIs4() const {
623 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
624 !isARMLowRegister(Mem.BaseRegNum))
626 // Immediate offset, multiple of 4 in range [0, 124].
627 if (!Mem.OffsetImm) return true;
628 int64_t Val = Mem.OffsetImm->getValue();
629 return Val >= 0 && Val < 125 && (Val % 4) == 0;
631 bool isMemImm8Offset() const {
632 if (Kind != Memory || Mem.OffsetRegNum != 0)
634 // Immediate offset in range [-255, 255].
635 if (!Mem.OffsetImm) return true;
636 int64_t Val = Mem.OffsetImm->getValue();
637 return Val > -256 && Val < 256;
639 bool isMemImm12Offset() const {
640 // If we have an immediate that's not a constant, treat it as a label
641 // reference needing a fixup. If it is a constant, it's something else
643 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
646 if (Kind != Memory || Mem.OffsetRegNum != 0)
648 // Immediate offset in range [-4095, 4095].
649 if (!Mem.OffsetImm) return true;
650 int64_t Val = Mem.OffsetImm->getValue();
651 return Val > -4096 && Val < 4096;
653 bool isPostIdxImm8() const {
654 if (Kind != Immediate)
656 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
657 if (!CE) return false;
658 int64_t Val = CE->getValue();
659 return Val > -256 && Val < 256;
662 bool isMSRMask() const { return Kind == MSRMask; }
663 bool isProcIFlags() const { return Kind == ProcIFlags; }
665 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
666 // Add as immediates when possible. Null MCExpr = 0.
668 Inst.addOperand(MCOperand::CreateImm(0));
669 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
670 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
672 Inst.addOperand(MCOperand::CreateExpr(Expr));
675 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
676 assert(N == 2 && "Invalid number of operands!");
677 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
678 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
679 Inst.addOperand(MCOperand::CreateReg(RegNum));
682 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
683 assert(N == 1 && "Invalid number of operands!");
684 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
687 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
688 assert(N == 1 && "Invalid number of operands!");
689 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
692 void addCCOutOperands(MCInst &Inst, unsigned N) const {
693 assert(N == 1 && "Invalid number of operands!");
694 Inst.addOperand(MCOperand::CreateReg(getReg()));
697 void addRegOperands(MCInst &Inst, unsigned N) const {
698 assert(N == 1 && "Invalid number of operands!");
699 Inst.addOperand(MCOperand::CreateReg(getReg()));
702 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
703 assert(N == 3 && "Invalid number of operands!");
704 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
705 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
706 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
707 Inst.addOperand(MCOperand::CreateImm(
708 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
711 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
712 assert(N == 2 && "Invalid number of operands!");
713 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
714 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
715 Inst.addOperand(MCOperand::CreateImm(
716 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
720 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
721 assert(N == 1 && "Invalid number of operands!");
722 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
726 void addRegListOperands(MCInst &Inst, unsigned N) const {
727 assert(N == 1 && "Invalid number of operands!");
728 const SmallVectorImpl<unsigned> &RegList = getRegList();
729 for (SmallVectorImpl<unsigned>::const_iterator
730 I = RegList.begin(), E = RegList.end(); I != E; ++I)
731 Inst.addOperand(MCOperand::CreateReg(*I));
734 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
735 addRegListOperands(Inst, N);
738 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
739 addRegListOperands(Inst, N);
742 void addRotImmOperands(MCInst &Inst, unsigned N) const {
743 assert(N == 1 && "Invalid number of operands!");
744 // Encoded as val>>3. The printer handles display as 8, 16, 24.
745 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
748 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
749 assert(N == 1 && "Invalid number of operands!");
750 // Munge the lsb/width into a bitfield mask.
751 unsigned lsb = Bitfield.LSB;
752 unsigned width = Bitfield.Width;
753 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
754 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
755 (32 - (lsb + width)));
756 Inst.addOperand(MCOperand::CreateImm(Mask));
759 void addImmOperands(MCInst &Inst, unsigned N) const {
760 assert(N == 1 && "Invalid number of operands!");
761 addExpr(Inst, getImm());
764 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
765 assert(N == 1 && "Invalid number of operands!");
766 addExpr(Inst, getImm());
769 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
770 assert(N == 1 && "Invalid number of operands!");
771 addExpr(Inst, getImm());
774 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
775 assert(N == 1 && "Invalid number of operands!");
776 addExpr(Inst, getImm());
779 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
780 assert(N == 1 && "Invalid number of operands!");
781 addExpr(Inst, getImm());
784 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
785 assert(N == 1 && "Invalid number of operands!");
786 // The constant encodes as the immediate-1, and we store in the instruction
787 // the bits as encoded, so subtract off one here.
788 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
789 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
792 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
793 assert(N == 1 && "Invalid number of operands!");
794 // The constant encodes as the immediate-1, and we store in the instruction
795 // the bits as encoded, so subtract off one here.
796 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
797 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
800 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
801 assert(N == 1 && "Invalid number of operands!");
802 addExpr(Inst, getImm());
805 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
806 assert(N == 1 && "Invalid number of operands!");
807 addExpr(Inst, getImm());
810 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
811 assert(N == 1 && "Invalid number of operands!");
812 addExpr(Inst, getImm());
815 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
816 assert(N == 1 && "Invalid number of operands!");
817 // The constant encodes as the immediate, except for 32, which encodes as
819 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
820 unsigned Imm = CE->getValue();
821 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
824 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
825 assert(N == 1 && "Invalid number of operands!");
826 addExpr(Inst, getImm());
829 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
830 assert(N == 1 && "Invalid number of operands!");
831 // An ASR value of 32 encodes as 0, so that's how we want to add it to
832 // the instruction as well.
833 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
834 int Val = CE->getValue();
835 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
838 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
839 assert(N == 1 && "Invalid number of operands!");
840 addExpr(Inst, getImm());
843 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
844 assert(N == 1 && "Invalid number of operands!");
845 addExpr(Inst, getImm());
848 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
849 assert(N == 1 && "Invalid number of operands!");
850 addExpr(Inst, getImm());
853 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
854 assert(N == 1 && "Invalid number of operands!");
855 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
858 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
859 assert(N == 1 && "Invalid number of operands!");
860 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
863 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
864 assert(N == 3 && "Invalid number of operands!");
865 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
866 if (!Mem.OffsetRegNum) {
867 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
868 // Special case for #-0
869 if (Val == INT32_MIN) Val = 0;
870 if (Val < 0) Val = -Val;
871 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
873 // For register offset, we encode the shift type and negation flag
875 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
876 Mem.ShiftImm, Mem.ShiftType);
878 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
879 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
880 Inst.addOperand(MCOperand::CreateImm(Val));
883 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
884 assert(N == 2 && "Invalid number of operands!");
885 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
886 assert(CE && "non-constant AM2OffsetImm operand!");
887 int32_t Val = CE->getValue();
888 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
889 // Special case for #-0
890 if (Val == INT32_MIN) Val = 0;
891 if (Val < 0) Val = -Val;
892 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
893 Inst.addOperand(MCOperand::CreateReg(0));
894 Inst.addOperand(MCOperand::CreateImm(Val));
897 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
898 assert(N == 3 && "Invalid number of operands!");
899 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
900 if (!Mem.OffsetRegNum) {
901 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
902 // Special case for #-0
903 if (Val == INT32_MIN) Val = 0;
904 if (Val < 0) Val = -Val;
905 Val = ARM_AM::getAM3Opc(AddSub, Val);
907 // For register offset, we encode the shift type and negation flag
909 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
911 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
912 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
913 Inst.addOperand(MCOperand::CreateImm(Val));
916 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
917 assert(N == 2 && "Invalid number of operands!");
918 if (Kind == PostIndexRegister) {
920 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
921 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
922 Inst.addOperand(MCOperand::CreateImm(Val));
927 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
928 int32_t Val = CE->getValue();
929 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
930 // Special case for #-0
931 if (Val == INT32_MIN) Val = 0;
932 if (Val < 0) Val = -Val;
933 Val = ARM_AM::getAM3Opc(AddSub, Val);
934 Inst.addOperand(MCOperand::CreateReg(0));
935 Inst.addOperand(MCOperand::CreateImm(Val));
938 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
939 assert(N == 2 && "Invalid number of operands!");
940 // The lower two bits are always zero and as such are not encoded.
941 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
942 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
943 // Special case for #-0
944 if (Val == INT32_MIN) Val = 0;
945 if (Val < 0) Val = -Val;
946 Val = ARM_AM::getAM5Opc(AddSub, Val);
947 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
948 Inst.addOperand(MCOperand::CreateImm(Val));
951 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
952 assert(N == 2 && "Invalid number of operands!");
953 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
954 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
955 Inst.addOperand(MCOperand::CreateImm(Val));
958 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
959 assert(N == 2 && "Invalid number of operands!");
960 // If this is an immediate, it's a label reference.
961 if (Kind == Immediate) {
962 addExpr(Inst, getImm());
963 Inst.addOperand(MCOperand::CreateImm(0));
967 // Otherwise, it's a normal memory reg+offset.
968 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
969 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
970 Inst.addOperand(MCOperand::CreateImm(Val));
973 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
974 assert(N == 3 && "Invalid number of operands!");
975 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
976 Mem.ShiftImm, Mem.ShiftType);
977 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
978 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
979 Inst.addOperand(MCOperand::CreateImm(Val));
982 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
983 assert(N == 2 && "Invalid number of operands!");
984 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
985 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
988 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
989 assert(N == 2 && "Invalid number of operands!");
990 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
991 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
992 Inst.addOperand(MCOperand::CreateImm(Val));
995 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
996 assert(N == 1 && "Invalid number of operands!");
997 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
998 assert(CE && "non-constant post-idx-imm8 operand!");
999 int Imm = CE->getValue();
1000 bool isAdd = Imm >= 0;
1001 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1002 Inst.addOperand(MCOperand::CreateImm(Imm));
1005 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1006 assert(N == 2 && "Invalid number of operands!");
1007 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1008 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1011 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1012 assert(N == 2 && "Invalid number of operands!");
1013 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1014 // The sign, shift type, and shift amount are encoded in a single operand
1015 // using the AM2 encoding helpers.
1016 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1017 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1018 PostIdxReg.ShiftTy);
1019 Inst.addOperand(MCOperand::CreateImm(Imm));
1022 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1023 assert(N == 1 && "Invalid number of operands!");
1024 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1027 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1028 assert(N == 1 && "Invalid number of operands!");
1029 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1032 virtual void print(raw_ostream &OS) const;
1034 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1035 ARMOperand *Op = new ARMOperand(CondCode);
1042 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1043 ARMOperand *Op = new ARMOperand(CoprocNum);
1044 Op->Cop.Val = CopVal;
1050 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1051 ARMOperand *Op = new ARMOperand(CoprocReg);
1052 Op->Cop.Val = CopVal;
1058 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1059 ARMOperand *Op = new ARMOperand(CCOut);
1060 Op->Reg.RegNum = RegNum;
1066 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1067 ARMOperand *Op = new ARMOperand(Token);
1068 Op->Tok.Data = Str.data();
1069 Op->Tok.Length = Str.size();
1075 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1076 ARMOperand *Op = new ARMOperand(Register);
1077 Op->Reg.RegNum = RegNum;
1083 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1088 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1089 Op->RegShiftedReg.ShiftTy = ShTy;
1090 Op->RegShiftedReg.SrcReg = SrcReg;
1091 Op->RegShiftedReg.ShiftReg = ShiftReg;
1092 Op->RegShiftedReg.ShiftImm = ShiftImm;
1098 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1102 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1103 Op->RegShiftedImm.ShiftTy = ShTy;
1104 Op->RegShiftedImm.SrcReg = SrcReg;
1105 Op->RegShiftedImm.ShiftImm = ShiftImm;
1111 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1113 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1114 Op->ShifterImm.isASR = isASR;
1115 Op->ShifterImm.Imm = Imm;
1121 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1122 ARMOperand *Op = new ARMOperand(RotateImmediate);
1123 Op->RotImm.Imm = Imm;
1129 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1131 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1132 Op->Bitfield.LSB = LSB;
1133 Op->Bitfield.Width = Width;
1140 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1141 SMLoc StartLoc, SMLoc EndLoc) {
1142 KindTy Kind = RegisterList;
1144 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1145 contains(Regs.front().first))
1146 Kind = DPRRegisterList;
1147 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1148 contains(Regs.front().first))
1149 Kind = SPRRegisterList;
1151 ARMOperand *Op = new ARMOperand(Kind);
1152 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1153 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1154 Op->Registers.push_back(I->first);
1155 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1156 Op->StartLoc = StartLoc;
1157 Op->EndLoc = EndLoc;
1161 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1162 ARMOperand *Op = new ARMOperand(Immediate);
1169 static ARMOperand *CreateMem(unsigned BaseRegNum,
1170 const MCConstantExpr *OffsetImm,
1171 unsigned OffsetRegNum,
1172 ARM_AM::ShiftOpc ShiftType,
1176 ARMOperand *Op = new ARMOperand(Memory);
1177 Op->Mem.BaseRegNum = BaseRegNum;
1178 Op->Mem.OffsetImm = OffsetImm;
1179 Op->Mem.OffsetRegNum = OffsetRegNum;
1180 Op->Mem.ShiftType = ShiftType;
1181 Op->Mem.ShiftImm = ShiftImm;
1182 Op->Mem.isNegative = isNegative;
1188 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1189 ARM_AM::ShiftOpc ShiftTy,
1192 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1193 Op->PostIdxReg.RegNum = RegNum;
1194 Op->PostIdxReg.isAdd = isAdd;
1195 Op->PostIdxReg.ShiftTy = ShiftTy;
1196 Op->PostIdxReg.ShiftImm = ShiftImm;
1202 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1203 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1204 Op->MBOpt.Val = Opt;
1210 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1211 ARMOperand *Op = new ARMOperand(ProcIFlags);
1212 Op->IFlags.Val = IFlags;
1218 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1219 ARMOperand *Op = new ARMOperand(MSRMask);
1220 Op->MMask.Val = MMask;
1227 } // end anonymous namespace.
1229 void ARMOperand::print(raw_ostream &OS) const {
1232 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1235 OS << "<ccout " << getReg() << ">";
1238 OS << "<coprocessor number: " << getCoproc() << ">";
1241 OS << "<coprocessor register: " << getCoproc() << ">";
1244 OS << "<mask: " << getMSRMask() << ">";
1247 getImm()->print(OS);
1250 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1254 << " base:" << Mem.BaseRegNum;
1257 case PostIndexRegister:
1258 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1259 << PostIdxReg.RegNum;
1260 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1261 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1262 << PostIdxReg.ShiftImm;
1266 OS << "<ARM_PROC::";
1267 unsigned IFlags = getProcIFlags();
1268 for (int i=2; i >= 0; --i)
1269 if (IFlags & (1 << i))
1270 OS << ARM_PROC::IFlagsToString(1 << i);
1275 OS << "<register " << getReg() << ">";
1277 case ShifterImmediate:
1278 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1279 << " #" << ShifterImm.Imm << ">";
1281 case ShiftedRegister:
1282 OS << "<so_reg_reg "
1283 << RegShiftedReg.SrcReg
1284 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1285 << ", " << RegShiftedReg.ShiftReg << ", "
1286 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1289 case ShiftedImmediate:
1290 OS << "<so_reg_imm "
1291 << RegShiftedImm.SrcReg
1292 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1293 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1296 case RotateImmediate:
1297 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1299 case BitfieldDescriptor:
1300 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1301 << ", width: " << Bitfield.Width << ">";
1304 case DPRRegisterList:
1305 case SPRRegisterList: {
1306 OS << "<register_list ";
1308 const SmallVectorImpl<unsigned> &RegList = getRegList();
1309 for (SmallVectorImpl<unsigned>::const_iterator
1310 I = RegList.begin(), E = RegList.end(); I != E; ) {
1312 if (++I < E) OS << ", ";
1319 OS << "'" << getToken() << "'";
1324 /// @name Auto-generated Match Functions
1327 static unsigned MatchRegisterName(StringRef Name);
1331 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1332 SMLoc &StartLoc, SMLoc &EndLoc) {
1333 RegNo = tryParseRegister();
1335 return (RegNo == (unsigned)-1);
1338 /// Try to parse a register name. The token must be an Identifier when called,
1339 /// and if it is a register name the token is eaten and the register number is
1340 /// returned. Otherwise return -1.
1342 int ARMAsmParser::tryParseRegister() {
1343 const AsmToken &Tok = Parser.getTok();
1344 if (Tok.isNot(AsmToken::Identifier)) return -1;
1346 // FIXME: Validate register for the current architecture; we have to do
1347 // validation later, so maybe there is no need for this here.
1348 std::string upperCase = Tok.getString().str();
1349 std::string lowerCase = LowercaseString(upperCase);
1350 unsigned RegNum = MatchRegisterName(lowerCase);
1352 RegNum = StringSwitch<unsigned>(lowerCase)
1353 .Case("r13", ARM::SP)
1354 .Case("r14", ARM::LR)
1355 .Case("r15", ARM::PC)
1356 .Case("ip", ARM::R12)
1359 if (!RegNum) return -1;
1361 Parser.Lex(); // Eat identifier token.
1365 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1366 // If a recoverable error occurs, return 1. If an irrecoverable error
1367 // occurs, return -1. An irrecoverable error is one where tokens have been
1368 // consumed in the process of trying to parse the shifter (i.e., when it is
1369 // indeed a shifter operand, but malformed).
1370 int ARMAsmParser::tryParseShiftRegister(
1371 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1372 SMLoc S = Parser.getTok().getLoc();
1373 const AsmToken &Tok = Parser.getTok();
1374 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1376 std::string upperCase = Tok.getString().str();
1377 std::string lowerCase = LowercaseString(upperCase);
1378 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1379 .Case("lsl", ARM_AM::lsl)
1380 .Case("lsr", ARM_AM::lsr)
1381 .Case("asr", ARM_AM::asr)
1382 .Case("ror", ARM_AM::ror)
1383 .Case("rrx", ARM_AM::rrx)
1384 .Default(ARM_AM::no_shift);
1386 if (ShiftTy == ARM_AM::no_shift)
1389 Parser.Lex(); // Eat the operator.
1391 // The source register for the shift has already been added to the
1392 // operand list, so we need to pop it off and combine it into the shifted
1393 // register operand instead.
1394 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1395 if (!PrevOp->isReg())
1396 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1397 int SrcReg = PrevOp->getReg();
1400 if (ShiftTy == ARM_AM::rrx) {
1401 // RRX Doesn't have an explicit shift amount. The encoder expects
1402 // the shift register to be the same as the source register. Seems odd,
1406 // Figure out if this is shifted by a constant or a register (for non-RRX).
1407 if (Parser.getTok().is(AsmToken::Hash)) {
1408 Parser.Lex(); // Eat hash.
1409 SMLoc ImmLoc = Parser.getTok().getLoc();
1410 const MCExpr *ShiftExpr = 0;
1411 if (getParser().ParseExpression(ShiftExpr)) {
1412 Error(ImmLoc, "invalid immediate shift value");
1415 // The expression must be evaluatable as an immediate.
1416 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1418 Error(ImmLoc, "invalid immediate shift value");
1421 // Range check the immediate.
1422 // lsl, ror: 0 <= imm <= 31
1423 // lsr, asr: 0 <= imm <= 32
1424 Imm = CE->getValue();
1426 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1427 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1428 Error(ImmLoc, "immediate shift value out of range");
1431 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1432 ShiftReg = tryParseRegister();
1433 SMLoc L = Parser.getTok().getLoc();
1434 if (ShiftReg == -1) {
1435 Error (L, "expected immediate or register in shift operand");
1439 Error (Parser.getTok().getLoc(),
1440 "expected immediate or register in shift operand");
1445 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1446 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1448 S, Parser.getTok().getLoc()));
1450 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1451 S, Parser.getTok().getLoc()));
1457 /// Try to parse a register name. The token must be an Identifier when called.
1458 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1459 /// if there is a "writeback". 'true' if it's not a register.
1461 /// TODO this is likely to change to allow different register types and or to
1462 /// parse for a specific register type.
1464 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1465 SMLoc S = Parser.getTok().getLoc();
1466 int RegNo = tryParseRegister();
1470 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1472 const AsmToken &ExclaimTok = Parser.getTok();
1473 if (ExclaimTok.is(AsmToken::Exclaim)) {
1474 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1475 ExclaimTok.getLoc()));
1476 Parser.Lex(); // Eat exclaim token
1482 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1483 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1485 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1486 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1488 switch (Name.size()) {
1491 if (Name[0] != CoprocOp)
1508 if (Name[0] != CoprocOp || Name[1] != '1')
1512 case '0': return 10;
1513 case '1': return 11;
1514 case '2': return 12;
1515 case '3': return 13;
1516 case '4': return 14;
1517 case '5': return 15;
1525 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1526 /// token must be an Identifier when called, and if it is a coprocessor
1527 /// number, the token is eaten and the operand is added to the operand list.
1528 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1529 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1530 SMLoc S = Parser.getTok().getLoc();
1531 const AsmToken &Tok = Parser.getTok();
1532 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1534 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1536 return MatchOperand_NoMatch;
1538 Parser.Lex(); // Eat identifier token.
1539 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1540 return MatchOperand_Success;
1543 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1544 /// token must be an Identifier when called, and if it is a coprocessor
1545 /// number, the token is eaten and the operand is added to the operand list.
1546 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1547 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1548 SMLoc S = Parser.getTok().getLoc();
1549 const AsmToken &Tok = Parser.getTok();
1550 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1552 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1554 return MatchOperand_NoMatch;
1556 Parser.Lex(); // Eat identifier token.
1557 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1558 return MatchOperand_Success;
1561 /// Parse a register list, return it if successful else return null. The first
1562 /// token must be a '{' when called.
1564 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1565 assert(Parser.getTok().is(AsmToken::LCurly) &&
1566 "Token is not a Left Curly Brace");
1567 SMLoc S = Parser.getTok().getLoc();
1569 // Read the rest of the registers in the list.
1570 unsigned PrevRegNum = 0;
1571 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1574 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1575 Parser.Lex(); // Eat non-identifier token.
1577 const AsmToken &RegTok = Parser.getTok();
1578 SMLoc RegLoc = RegTok.getLoc();
1579 if (RegTok.isNot(AsmToken::Identifier)) {
1580 Error(RegLoc, "register expected");
1584 int RegNum = tryParseRegister();
1586 Error(RegLoc, "register expected");
1591 int Reg = PrevRegNum;
1594 Registers.push_back(std::make_pair(Reg, RegLoc));
1595 } while (Reg != RegNum);
1597 Registers.push_back(std::make_pair(RegNum, RegLoc));
1600 PrevRegNum = RegNum;
1601 } while (Parser.getTok().is(AsmToken::Comma) ||
1602 Parser.getTok().is(AsmToken::Minus));
1604 // Process the right curly brace of the list.
1605 const AsmToken &RCurlyTok = Parser.getTok();
1606 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1607 Error(RCurlyTok.getLoc(), "'}' expected");
1611 SMLoc E = RCurlyTok.getLoc();
1612 Parser.Lex(); // Eat right curly brace token.
1614 // Verify the register list.
1615 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1616 RI = Registers.begin(), RE = Registers.end();
1618 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1619 bool EmittedWarning = false;
1621 DenseMap<unsigned, bool> RegMap;
1622 RegMap[HighRegNum] = true;
1624 for (++RI; RI != RE; ++RI) {
1625 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1626 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1629 Error(RegInfo.second, "register duplicated in register list");
1633 if (!EmittedWarning && Reg < HighRegNum)
1634 Warning(RegInfo.second,
1635 "register not in ascending order in register list");
1638 HighRegNum = std::max(Reg, HighRegNum);
1641 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1645 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1646 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1647 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1648 SMLoc S = Parser.getTok().getLoc();
1649 const AsmToken &Tok = Parser.getTok();
1650 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1651 StringRef OptStr = Tok.getString();
1653 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1654 .Case("sy", ARM_MB::SY)
1655 .Case("st", ARM_MB::ST)
1656 .Case("sh", ARM_MB::ISH)
1657 .Case("ish", ARM_MB::ISH)
1658 .Case("shst", ARM_MB::ISHST)
1659 .Case("ishst", ARM_MB::ISHST)
1660 .Case("nsh", ARM_MB::NSH)
1661 .Case("un", ARM_MB::NSH)
1662 .Case("nshst", ARM_MB::NSHST)
1663 .Case("unst", ARM_MB::NSHST)
1664 .Case("osh", ARM_MB::OSH)
1665 .Case("oshst", ARM_MB::OSHST)
1669 return MatchOperand_NoMatch;
1671 Parser.Lex(); // Eat identifier token.
1672 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1673 return MatchOperand_Success;
1676 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1677 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1678 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1679 SMLoc S = Parser.getTok().getLoc();
1680 const AsmToken &Tok = Parser.getTok();
1681 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1682 StringRef IFlagsStr = Tok.getString();
1684 unsigned IFlags = 0;
1685 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1686 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1687 .Case("a", ARM_PROC::A)
1688 .Case("i", ARM_PROC::I)
1689 .Case("f", ARM_PROC::F)
1692 // If some specific iflag is already set, it means that some letter is
1693 // present more than once, this is not acceptable.
1694 if (Flag == ~0U || (IFlags & Flag))
1695 return MatchOperand_NoMatch;
1700 Parser.Lex(); // Eat identifier token.
1701 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1702 return MatchOperand_Success;
1705 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1706 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1707 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1708 SMLoc S = Parser.getTok().getLoc();
1709 const AsmToken &Tok = Parser.getTok();
1710 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1711 StringRef Mask = Tok.getString();
1713 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1714 size_t Start = 0, Next = Mask.find('_');
1715 StringRef Flags = "";
1716 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1717 if (Next != StringRef::npos)
1718 Flags = Mask.slice(Next+1, Mask.size());
1720 // FlagsVal contains the complete mask:
1722 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1723 unsigned FlagsVal = 0;
1725 if (SpecReg == "apsr") {
1726 FlagsVal = StringSwitch<unsigned>(Flags)
1727 .Case("nzcvq", 0x8) // same as CPSR_f
1728 .Case("g", 0x4) // same as CPSR_s
1729 .Case("nzcvqg", 0xc) // same as CPSR_fs
1732 if (FlagsVal == ~0U) {
1734 return MatchOperand_NoMatch;
1736 FlagsVal = 0; // No flag
1738 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1739 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1741 for (int i = 0, e = Flags.size(); i != e; ++i) {
1742 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1749 // If some specific flag is already set, it means that some letter is
1750 // present more than once, this is not acceptable.
1751 if (FlagsVal == ~0U || (FlagsVal & Flag))
1752 return MatchOperand_NoMatch;
1755 } else // No match for special register.
1756 return MatchOperand_NoMatch;
1758 // Special register without flags are equivalent to "fc" flags.
1762 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1763 if (SpecReg == "spsr")
1766 Parser.Lex(); // Eat identifier token.
1767 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1768 return MatchOperand_Success;
1771 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1772 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1773 int Low, int High) {
1774 const AsmToken &Tok = Parser.getTok();
1775 if (Tok.isNot(AsmToken::Identifier)) {
1776 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1777 return MatchOperand_ParseFail;
1779 StringRef ShiftName = Tok.getString();
1780 std::string LowerOp = LowercaseString(Op);
1781 std::string UpperOp = UppercaseString(Op);
1782 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1783 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1784 return MatchOperand_ParseFail;
1786 Parser.Lex(); // Eat shift type token.
1788 // There must be a '#' and a shift amount.
1789 if (Parser.getTok().isNot(AsmToken::Hash)) {
1790 Error(Parser.getTok().getLoc(), "'#' expected");
1791 return MatchOperand_ParseFail;
1793 Parser.Lex(); // Eat hash token.
1795 const MCExpr *ShiftAmount;
1796 SMLoc Loc = Parser.getTok().getLoc();
1797 if (getParser().ParseExpression(ShiftAmount)) {
1798 Error(Loc, "illegal expression");
1799 return MatchOperand_ParseFail;
1801 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1803 Error(Loc, "constant expression expected");
1804 return MatchOperand_ParseFail;
1806 int Val = CE->getValue();
1807 if (Val < Low || Val > High) {
1808 Error(Loc, "immediate value out of range");
1809 return MatchOperand_ParseFail;
1812 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1814 return MatchOperand_Success;
1817 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1818 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1819 const AsmToken &Tok = Parser.getTok();
1820 SMLoc S = Tok.getLoc();
1821 if (Tok.isNot(AsmToken::Identifier)) {
1822 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1823 return MatchOperand_ParseFail;
1825 int Val = StringSwitch<int>(Tok.getString())
1829 Parser.Lex(); // Eat the token.
1832 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1833 return MatchOperand_ParseFail;
1835 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1837 S, Parser.getTok().getLoc()));
1838 return MatchOperand_Success;
1841 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1842 /// instructions. Legal values are:
1843 /// lsl #n 'n' in [0,31]
1844 /// asr #n 'n' in [1,32]
1845 /// n == 32 encoded as n == 0.
1846 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1847 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1848 const AsmToken &Tok = Parser.getTok();
1849 SMLoc S = Tok.getLoc();
1850 if (Tok.isNot(AsmToken::Identifier)) {
1851 Error(S, "shift operator 'asr' or 'lsl' expected");
1852 return MatchOperand_ParseFail;
1854 StringRef ShiftName = Tok.getString();
1856 if (ShiftName == "lsl" || ShiftName == "LSL")
1858 else if (ShiftName == "asr" || ShiftName == "ASR")
1861 Error(S, "shift operator 'asr' or 'lsl' expected");
1862 return MatchOperand_ParseFail;
1864 Parser.Lex(); // Eat the operator.
1866 // A '#' and a shift amount.
1867 if (Parser.getTok().isNot(AsmToken::Hash)) {
1868 Error(Parser.getTok().getLoc(), "'#' expected");
1869 return MatchOperand_ParseFail;
1871 Parser.Lex(); // Eat hash token.
1873 const MCExpr *ShiftAmount;
1874 SMLoc E = Parser.getTok().getLoc();
1875 if (getParser().ParseExpression(ShiftAmount)) {
1876 Error(E, "malformed shift expression");
1877 return MatchOperand_ParseFail;
1879 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1881 Error(E, "shift amount must be an immediate");
1882 return MatchOperand_ParseFail;
1885 int64_t Val = CE->getValue();
1887 // Shift amount must be in [1,32]
1888 if (Val < 1 || Val > 32) {
1889 Error(E, "'asr' shift amount must be in range [1,32]");
1890 return MatchOperand_ParseFail;
1892 // asr #32 encoded as asr #0.
1893 if (Val == 32) Val = 0;
1895 // Shift amount must be in [1,32]
1896 if (Val < 0 || Val > 31) {
1897 Error(E, "'lsr' shift amount must be in range [0,31]");
1898 return MatchOperand_ParseFail;
1902 E = Parser.getTok().getLoc();
1903 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1905 return MatchOperand_Success;
1908 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1909 /// of instructions. Legal values are:
1910 /// ror #n 'n' in {0, 8, 16, 24}
1911 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1912 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1913 const AsmToken &Tok = Parser.getTok();
1914 SMLoc S = Tok.getLoc();
1915 if (Tok.isNot(AsmToken::Identifier)) {
1916 Error(S, "rotate operator 'ror' expected");
1917 return MatchOperand_ParseFail;
1919 StringRef ShiftName = Tok.getString();
1920 if (ShiftName != "ror" && ShiftName != "ROR") {
1921 Error(S, "rotate operator 'ror' expected");
1922 return MatchOperand_ParseFail;
1924 Parser.Lex(); // Eat the operator.
1926 // A '#' and a rotate amount.
1927 if (Parser.getTok().isNot(AsmToken::Hash)) {
1928 Error(Parser.getTok().getLoc(), "'#' expected");
1929 return MatchOperand_ParseFail;
1931 Parser.Lex(); // Eat hash token.
1933 const MCExpr *ShiftAmount;
1934 SMLoc E = Parser.getTok().getLoc();
1935 if (getParser().ParseExpression(ShiftAmount)) {
1936 Error(E, "malformed rotate expression");
1937 return MatchOperand_ParseFail;
1939 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1941 Error(E, "rotate amount must be an immediate");
1942 return MatchOperand_ParseFail;
1945 int64_t Val = CE->getValue();
1946 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1947 // normally, zero is represented in asm by omitting the rotate operand
1949 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1950 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1951 return MatchOperand_ParseFail;
1954 E = Parser.getTok().getLoc();
1955 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1957 return MatchOperand_Success;
1960 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1961 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1962 SMLoc S = Parser.getTok().getLoc();
1963 // The bitfield descriptor is really two operands, the LSB and the width.
1964 if (Parser.getTok().isNot(AsmToken::Hash)) {
1965 Error(Parser.getTok().getLoc(), "'#' expected");
1966 return MatchOperand_ParseFail;
1968 Parser.Lex(); // Eat hash token.
1970 const MCExpr *LSBExpr;
1971 SMLoc E = Parser.getTok().getLoc();
1972 if (getParser().ParseExpression(LSBExpr)) {
1973 Error(E, "malformed immediate expression");
1974 return MatchOperand_ParseFail;
1976 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
1978 Error(E, "'lsb' operand must be an immediate");
1979 return MatchOperand_ParseFail;
1982 int64_t LSB = CE->getValue();
1983 // The LSB must be in the range [0,31]
1984 if (LSB < 0 || LSB > 31) {
1985 Error(E, "'lsb' operand must be in the range [0,31]");
1986 return MatchOperand_ParseFail;
1988 E = Parser.getTok().getLoc();
1990 // Expect another immediate operand.
1991 if (Parser.getTok().isNot(AsmToken::Comma)) {
1992 Error(Parser.getTok().getLoc(), "too few operands");
1993 return MatchOperand_ParseFail;
1995 Parser.Lex(); // Eat hash token.
1996 if (Parser.getTok().isNot(AsmToken::Hash)) {
1997 Error(Parser.getTok().getLoc(), "'#' expected");
1998 return MatchOperand_ParseFail;
2000 Parser.Lex(); // Eat hash token.
2002 const MCExpr *WidthExpr;
2003 if (getParser().ParseExpression(WidthExpr)) {
2004 Error(E, "malformed immediate expression");
2005 return MatchOperand_ParseFail;
2007 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2009 Error(E, "'width' operand must be an immediate");
2010 return MatchOperand_ParseFail;
2013 int64_t Width = CE->getValue();
2014 // The LSB must be in the range [1,32-lsb]
2015 if (Width < 1 || Width > 32 - LSB) {
2016 Error(E, "'width' operand must be in the range [1,32-lsb]");
2017 return MatchOperand_ParseFail;
2019 E = Parser.getTok().getLoc();
2021 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2023 return MatchOperand_Success;
2026 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2027 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2028 // Check for a post-index addressing register operand. Specifically:
2029 // postidx_reg := '+' register {, shift}
2030 // | '-' register {, shift}
2031 // | register {, shift}
2033 // This method must return MatchOperand_NoMatch without consuming any tokens
2034 // in the case where there is no match, as other alternatives take other
2036 AsmToken Tok = Parser.getTok();
2037 SMLoc S = Tok.getLoc();
2038 bool haveEaten = false;
2041 if (Tok.is(AsmToken::Plus)) {
2042 Parser.Lex(); // Eat the '+' token.
2044 } else if (Tok.is(AsmToken::Minus)) {
2045 Parser.Lex(); // Eat the '-' token.
2049 if (Parser.getTok().is(AsmToken::Identifier))
2050 Reg = tryParseRegister();
2053 return MatchOperand_NoMatch;
2054 Error(Parser.getTok().getLoc(), "register expected");
2055 return MatchOperand_ParseFail;
2057 SMLoc E = Parser.getTok().getLoc();
2059 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2060 unsigned ShiftImm = 0;
2061 if (Parser.getTok().is(AsmToken::Comma)) {
2062 Parser.Lex(); // Eat the ','.
2063 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2064 return MatchOperand_ParseFail;
2067 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2070 return MatchOperand_Success;
2073 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2074 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2075 // Check for a post-index addressing register operand. Specifically:
2076 // am3offset := '+' register
2083 // This method must return MatchOperand_NoMatch without consuming any tokens
2084 // in the case where there is no match, as other alternatives take other
2086 AsmToken Tok = Parser.getTok();
2087 SMLoc S = Tok.getLoc();
2089 // Do immediates first, as we always parse those if we have a '#'.
2090 if (Parser.getTok().is(AsmToken::Hash)) {
2091 Parser.Lex(); // Eat the '#'.
2092 // Explicitly look for a '-', as we need to encode negative zero
2094 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2095 const MCExpr *Offset;
2096 if (getParser().ParseExpression(Offset))
2097 return MatchOperand_ParseFail;
2098 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2100 Error(S, "constant expression expected");
2101 return MatchOperand_ParseFail;
2103 SMLoc E = Tok.getLoc();
2104 // Negative zero is encoded as the flag value INT32_MIN.
2105 int32_t Val = CE->getValue();
2106 if (isNegative && Val == 0)
2110 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2112 return MatchOperand_Success;
2116 bool haveEaten = false;
2119 if (Tok.is(AsmToken::Plus)) {
2120 Parser.Lex(); // Eat the '+' token.
2122 } else if (Tok.is(AsmToken::Minus)) {
2123 Parser.Lex(); // Eat the '-' token.
2127 if (Parser.getTok().is(AsmToken::Identifier))
2128 Reg = tryParseRegister();
2131 return MatchOperand_NoMatch;
2132 Error(Parser.getTok().getLoc(), "register expected");
2133 return MatchOperand_ParseFail;
2135 SMLoc E = Parser.getTok().getLoc();
2137 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2140 return MatchOperand_Success;
2143 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2144 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2145 /// when they refer multiple MIOperands inside a single one.
2147 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2148 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2149 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2151 // Create a writeback register dummy placeholder.
2152 Inst.addOperand(MCOperand::CreateImm(0));
2154 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2155 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2159 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2160 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2161 /// when they refer multiple MIOperands inside a single one.
2163 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2164 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2165 // Create a writeback register dummy placeholder.
2166 Inst.addOperand(MCOperand::CreateImm(0));
2167 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2168 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2169 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2173 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2174 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2175 /// when they refer multiple MIOperands inside a single one.
2177 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2178 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2179 // Create a writeback register dummy placeholder.
2180 Inst.addOperand(MCOperand::CreateImm(0));
2181 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2182 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2183 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2187 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2188 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2189 /// when they refer multiple MIOperands inside a single one.
2191 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2192 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2193 // Create a writeback register dummy placeholder.
2194 Inst.addOperand(MCOperand::CreateImm(0));
2195 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2196 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2197 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2201 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2202 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2203 /// when they refer multiple MIOperands inside a single one.
2205 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2206 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2208 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2209 // Create a writeback register dummy placeholder.
2210 Inst.addOperand(MCOperand::CreateImm(0));
2212 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2214 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2216 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2220 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2221 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2222 /// when they refer multiple MIOperands inside a single one.
2224 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2225 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2227 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2228 // Create a writeback register dummy placeholder.
2229 Inst.addOperand(MCOperand::CreateImm(0));
2231 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2233 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2235 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2239 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2240 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2241 /// when they refer multiple MIOperands inside a single one.
2243 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2244 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2245 // Create a writeback register dummy placeholder.
2246 Inst.addOperand(MCOperand::CreateImm(0));
2248 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2250 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2252 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2254 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2258 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2259 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2260 /// when they refer multiple MIOperands inside a single one.
2262 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2263 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2264 // Create a writeback register dummy placeholder.
2265 Inst.addOperand(MCOperand::CreateImm(0));
2267 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2269 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2271 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2273 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2277 /// cvtLdrdPre - Convert parsed operands to MCInst.
2278 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2279 /// when they refer multiple MIOperands inside a single one.
2281 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2282 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2284 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2285 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2286 // Create a writeback register dummy placeholder.
2287 Inst.addOperand(MCOperand::CreateImm(0));
2289 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2291 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2295 /// cvtStrdPre - Convert parsed operands to MCInst.
2296 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2297 /// when they refer multiple MIOperands inside a single one.
2299 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2300 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2301 // Create a writeback register dummy placeholder.
2302 Inst.addOperand(MCOperand::CreateImm(0));
2304 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2305 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2307 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2309 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2313 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2314 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2315 /// when they refer multiple MIOperands inside a single one.
2317 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2318 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2319 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2320 // Create a writeback register dummy placeholder.
2321 Inst.addOperand(MCOperand::CreateImm(0));
2322 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2323 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2328 /// Parse an ARM memory expression, return false if successful else return true
2329 /// or an error. The first token must be a '[' when called.
2331 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2333 assert(Parser.getTok().is(AsmToken::LBrac) &&
2334 "Token is not a Left Bracket");
2335 S = Parser.getTok().getLoc();
2336 Parser.Lex(); // Eat left bracket token.
2338 const AsmToken &BaseRegTok = Parser.getTok();
2339 int BaseRegNum = tryParseRegister();
2340 if (BaseRegNum == -1)
2341 return Error(BaseRegTok.getLoc(), "register expected");
2343 // The next token must either be a comma or a closing bracket.
2344 const AsmToken &Tok = Parser.getTok();
2345 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2346 return Error(Tok.getLoc(), "malformed memory operand");
2348 if (Tok.is(AsmToken::RBrac)) {
2350 Parser.Lex(); // Eat right bracket token.
2352 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2358 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2359 Parser.Lex(); // Eat the comma.
2361 // If we have a '#' it's an immediate offset, else assume it's a register
2363 if (Parser.getTok().is(AsmToken::Hash)) {
2364 Parser.Lex(); // Eat the '#'.
2365 E = Parser.getTok().getLoc();
2367 // FIXME: Special case #-0 so we can correctly set the U bit.
2369 const MCExpr *Offset;
2370 if (getParser().ParseExpression(Offset))
2373 // The expression has to be a constant. Memory references with relocations
2374 // don't come through here, as they use the <label> forms of the relevant
2376 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2378 return Error (E, "constant expression expected");
2380 // Now we should have the closing ']'
2381 E = Parser.getTok().getLoc();
2382 if (Parser.getTok().isNot(AsmToken::RBrac))
2383 return Error(E, "']' expected");
2384 Parser.Lex(); // Eat right bracket token.
2386 // Don't worry about range checking the value here. That's handled by
2387 // the is*() predicates.
2388 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2389 ARM_AM::no_shift, 0, false, S,E));
2391 // If there's a pre-indexing writeback marker, '!', just add it as a token
2393 if (Parser.getTok().is(AsmToken::Exclaim)) {
2394 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2395 Parser.Lex(); // Eat the '!'.
2401 // The register offset is optionally preceded by a '+' or '-'
2402 bool isNegative = false;
2403 if (Parser.getTok().is(AsmToken::Minus)) {
2405 Parser.Lex(); // Eat the '-'.
2406 } else if (Parser.getTok().is(AsmToken::Plus)) {
2408 Parser.Lex(); // Eat the '+'.
2411 E = Parser.getTok().getLoc();
2412 int OffsetRegNum = tryParseRegister();
2413 if (OffsetRegNum == -1)
2414 return Error(E, "register expected");
2416 // If there's a shift operator, handle it.
2417 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2418 unsigned ShiftImm = 0;
2419 if (Parser.getTok().is(AsmToken::Comma)) {
2420 Parser.Lex(); // Eat the ','.
2421 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2425 // Now we should have the closing ']'
2426 E = Parser.getTok().getLoc();
2427 if (Parser.getTok().isNot(AsmToken::RBrac))
2428 return Error(E, "']' expected");
2429 Parser.Lex(); // Eat right bracket token.
2431 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2432 ShiftType, ShiftImm, isNegative,
2435 // If there's a pre-indexing writeback marker, '!', just add it as a token
2437 if (Parser.getTok().is(AsmToken::Exclaim)) {
2438 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2439 Parser.Lex(); // Eat the '!'.
2445 /// parseMemRegOffsetShift - one of these two:
2446 /// ( lsl | lsr | asr | ror ) , # shift_amount
2448 /// return true if it parses a shift otherwise it returns false.
2449 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2451 SMLoc Loc = Parser.getTok().getLoc();
2452 const AsmToken &Tok = Parser.getTok();
2453 if (Tok.isNot(AsmToken::Identifier))
2455 StringRef ShiftName = Tok.getString();
2456 if (ShiftName == "lsl" || ShiftName == "LSL")
2458 else if (ShiftName == "lsr" || ShiftName == "LSR")
2460 else if (ShiftName == "asr" || ShiftName == "ASR")
2462 else if (ShiftName == "ror" || ShiftName == "ROR")
2464 else if (ShiftName == "rrx" || ShiftName == "RRX")
2467 return Error(Loc, "illegal shift operator");
2468 Parser.Lex(); // Eat shift type token.
2470 // rrx stands alone.
2472 if (St != ARM_AM::rrx) {
2473 Loc = Parser.getTok().getLoc();
2474 // A '#' and a shift amount.
2475 const AsmToken &HashTok = Parser.getTok();
2476 if (HashTok.isNot(AsmToken::Hash))
2477 return Error(HashTok.getLoc(), "'#' expected");
2478 Parser.Lex(); // Eat hash token.
2481 if (getParser().ParseExpression(Expr))
2483 // Range check the immediate.
2484 // lsl, ror: 0 <= imm <= 31
2485 // lsr, asr: 0 <= imm <= 32
2486 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2488 return Error(Loc, "shift amount must be an immediate");
2489 int64_t Imm = CE->getValue();
2491 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2492 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2493 return Error(Loc, "immediate shift value out of range");
2500 /// Parse a arm instruction operand. For now this parses the operand regardless
2501 /// of the mnemonic.
2502 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2503 StringRef Mnemonic) {
2506 // Check if the current operand has a custom associated parser, if so, try to
2507 // custom parse the operand, or fallback to the general approach.
2508 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2509 if (ResTy == MatchOperand_Success)
2511 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2512 // there was a match, but an error occurred, in which case, just return that
2513 // the operand parsing failed.
2514 if (ResTy == MatchOperand_ParseFail)
2517 switch (getLexer().getKind()) {
2519 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2521 case AsmToken::Identifier: {
2522 if (!tryParseRegisterWithWriteBack(Operands))
2524 int Res = tryParseShiftRegister(Operands);
2525 if (Res == 0) // success
2527 else if (Res == -1) // irrecoverable error
2530 // Fall though for the Identifier case that is not a register or a
2533 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2534 case AsmToken::Dot: { // . as a branch target
2535 // This was not a register so parse other operands that start with an
2536 // identifier (like labels) as expressions and create them as immediates.
2537 const MCExpr *IdVal;
2538 S = Parser.getTok().getLoc();
2539 if (getParser().ParseExpression(IdVal))
2541 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2542 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2545 case AsmToken::LBrac:
2546 return parseMemory(Operands);
2547 case AsmToken::LCurly:
2548 return parseRegisterList(Operands);
2549 case AsmToken::Hash:
2550 // #42 -> immediate.
2551 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2552 S = Parser.getTok().getLoc();
2554 const MCExpr *ImmVal;
2555 if (getParser().ParseExpression(ImmVal))
2557 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2558 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2560 case AsmToken::Colon: {
2561 // ":lower16:" and ":upper16:" expression prefixes
2562 // FIXME: Check it's an expression prefix,
2563 // e.g. (FOO - :lower16:BAR) isn't legal.
2564 ARMMCExpr::VariantKind RefKind;
2565 if (parsePrefix(RefKind))
2568 const MCExpr *SubExprVal;
2569 if (getParser().ParseExpression(SubExprVal))
2572 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2574 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2575 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2581 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2582 // :lower16: and :upper16:.
2583 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2584 RefKind = ARMMCExpr::VK_ARM_None;
2586 // :lower16: and :upper16: modifiers
2587 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2588 Parser.Lex(); // Eat ':'
2590 if (getLexer().isNot(AsmToken::Identifier)) {
2591 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2595 StringRef IDVal = Parser.getTok().getIdentifier();
2596 if (IDVal == "lower16") {
2597 RefKind = ARMMCExpr::VK_ARM_LO16;
2598 } else if (IDVal == "upper16") {
2599 RefKind = ARMMCExpr::VK_ARM_HI16;
2601 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2606 if (getLexer().isNot(AsmToken::Colon)) {
2607 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2610 Parser.Lex(); // Eat the last ':'
2615 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2616 MCSymbolRefExpr::VariantKind Variant) {
2617 // Recurse over the given expression, rebuilding it to apply the given variant
2618 // to the leftmost symbol.
2619 if (Variant == MCSymbolRefExpr::VK_None)
2622 switch (E->getKind()) {
2623 case MCExpr::Target:
2624 llvm_unreachable("Can't handle target expr yet");
2625 case MCExpr::Constant:
2626 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2628 case MCExpr::SymbolRef: {
2629 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2631 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2634 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2638 llvm_unreachable("Can't handle unary expressions yet");
2640 case MCExpr::Binary: {
2641 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2642 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2643 const MCExpr *RHS = BE->getRHS();
2647 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2651 assert(0 && "Invalid expression kind!");
2655 /// \brief Given a mnemonic, split out possible predication code and carry
2656 /// setting letters to form a canonical mnemonic and flags.
2658 // FIXME: Would be nice to autogen this.
2659 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2660 unsigned &PredicationCode,
2662 unsigned &ProcessorIMod) {
2663 PredicationCode = ARMCC::AL;
2664 CarrySetting = false;
2667 // Ignore some mnemonics we know aren't predicated forms.
2669 // FIXME: Would be nice to autogen this.
2670 if ((Mnemonic == "movs" && isThumb()) ||
2671 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2672 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2673 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2674 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2675 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2676 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2677 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2680 // First, split out any predication code. Ignore mnemonics we know aren't
2681 // predicated but do have a carry-set and so weren't caught above.
2682 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2683 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2684 Mnemonic != "umlals" && Mnemonic != "umulls") {
2685 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2686 .Case("eq", ARMCC::EQ)
2687 .Case("ne", ARMCC::NE)
2688 .Case("hs", ARMCC::HS)
2689 .Case("cs", ARMCC::HS)
2690 .Case("lo", ARMCC::LO)
2691 .Case("cc", ARMCC::LO)
2692 .Case("mi", ARMCC::MI)
2693 .Case("pl", ARMCC::PL)
2694 .Case("vs", ARMCC::VS)
2695 .Case("vc", ARMCC::VC)
2696 .Case("hi", ARMCC::HI)
2697 .Case("ls", ARMCC::LS)
2698 .Case("ge", ARMCC::GE)
2699 .Case("lt", ARMCC::LT)
2700 .Case("gt", ARMCC::GT)
2701 .Case("le", ARMCC::LE)
2702 .Case("al", ARMCC::AL)
2705 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2706 PredicationCode = CC;
2710 // Next, determine if we have a carry setting bit. We explicitly ignore all
2711 // the instructions we know end in 's'.
2712 if (Mnemonic.endswith("s") &&
2713 !(Mnemonic == "cps" || Mnemonic == "mls" ||
2714 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2715 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2716 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2717 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2718 (Mnemonic == "movs" && isThumb()))) {
2719 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2720 CarrySetting = true;
2723 // The "cps" instruction can have a interrupt mode operand which is glued into
2724 // the mnemonic. Check if this is the case, split it and parse the imod op
2725 if (Mnemonic.startswith("cps")) {
2726 // Split out any imod code.
2728 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2729 .Case("ie", ARM_PROC::IE)
2730 .Case("id", ARM_PROC::ID)
2733 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2734 ProcessorIMod = IMod;
2741 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2742 /// inclusion of carry set or predication code operands.
2744 // FIXME: It would be nice to autogen this.
2746 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2747 bool &CanAcceptPredicationCode) {
2748 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2749 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2750 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2751 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2752 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2753 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2754 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2755 Mnemonic == "eor" || Mnemonic == "smlal" ||
2756 // FIXME: We need a better way. This really confused Thumb2
2757 // parsing for 'mov'.
2758 (Mnemonic == "mov" && !isThumbOne())) {
2759 CanAcceptCarrySet = true;
2761 CanAcceptCarrySet = false;
2764 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2765 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2766 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2767 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2768 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2769 Mnemonic == "setend" ||
2770 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2771 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2773 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2774 CanAcceptPredicationCode = false;
2776 CanAcceptPredicationCode = true;
2780 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2781 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2782 CanAcceptPredicationCode = false;
2785 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
2786 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2788 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2789 // another does not. Specifically, the MOVW instruction does not. So we
2790 // special case it here and remove the defaulted (non-setting) cc_out
2791 // operand if that's the instruction we're trying to match.
2793 // We do this as post-processing of the explicit operands rather than just
2794 // conditionally adding the cc_out in the first place because we need
2795 // to check the type of the parsed immediate operand.
2796 if (Mnemonic == "mov" && Operands.size() > 4 &&
2797 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2798 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2799 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2802 // Register-register 'add' for thumb does not have a cc_out operand
2803 // when there are only two register operands.
2804 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
2805 static_cast<ARMOperand*>(Operands[3])->isReg() &&
2806 static_cast<ARMOperand*>(Operands[4])->isReg() &&
2807 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2813 /// Parse an arm instruction mnemonic followed by its operands.
2814 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2815 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2816 // Create the leading tokens for the mnemonic, split by '.' characters.
2817 size_t Start = 0, Next = Name.find('.');
2818 StringRef Mnemonic = Name.slice(Start, Next);
2820 // Split out the predication code and carry setting flag from the mnemonic.
2821 unsigned PredicationCode;
2822 unsigned ProcessorIMod;
2824 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2827 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2829 // FIXME: This is all a pretty gross hack. We should automatically handle
2830 // optional operands like this via tblgen.
2832 // Next, add the CCOut and ConditionCode operands, if needed.
2834 // For mnemonics which can ever incorporate a carry setting bit or predication
2835 // code, our matching model involves us always generating CCOut and
2836 // ConditionCode operands to match the mnemonic "as written" and then we let
2837 // the matcher deal with finding the right instruction or generating an
2838 // appropriate error.
2839 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2840 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2842 // If we had a carry-set on an instruction that can't do that, issue an
2844 if (!CanAcceptCarrySet && CarrySetting) {
2845 Parser.EatToEndOfStatement();
2846 return Error(NameLoc, "instruction '" + Mnemonic +
2847 "' can not set flags, but 's' suffix specified");
2849 // If we had a predication code on an instruction that can't do that, issue an
2851 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2852 Parser.EatToEndOfStatement();
2853 return Error(NameLoc, "instruction '" + Mnemonic +
2854 "' is not predicable, but condition code specified");
2857 // Add the carry setting operand, if necessary.
2859 // FIXME: It would be awesome if we could somehow invent a location such that
2860 // match errors on this operand would print a nice diagnostic about how the
2861 // 's' character in the mnemonic resulted in a CCOut operand.
2862 if (CanAcceptCarrySet)
2863 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2866 // Add the predication code operand, if necessary.
2867 if (CanAcceptPredicationCode) {
2868 Operands.push_back(ARMOperand::CreateCondCode(
2869 ARMCC::CondCodes(PredicationCode), NameLoc));
2872 // Add the processor imod operand, if necessary.
2873 if (ProcessorIMod) {
2874 Operands.push_back(ARMOperand::CreateImm(
2875 MCConstantExpr::Create(ProcessorIMod, getContext()),
2878 // This mnemonic can't ever accept a imod, but the user wrote
2879 // one (or misspelled another mnemonic).
2881 // FIXME: Issue a nice error.
2884 // Add the remaining tokens in the mnemonic.
2885 while (Next != StringRef::npos) {
2887 Next = Name.find('.', Start + 1);
2888 StringRef ExtraToken = Name.slice(Start, Next);
2890 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2893 // Read the remaining operands.
2894 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2895 // Read the first operand.
2896 if (parseOperand(Operands, Mnemonic)) {
2897 Parser.EatToEndOfStatement();
2901 while (getLexer().is(AsmToken::Comma)) {
2902 Parser.Lex(); // Eat the comma.
2904 // Parse and remember the operand.
2905 if (parseOperand(Operands, Mnemonic)) {
2906 Parser.EatToEndOfStatement();
2912 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2913 Parser.EatToEndOfStatement();
2914 return TokError("unexpected token in argument list");
2917 Parser.Lex(); // Consume the EndOfStatement
2919 // Some instructions, mostly Thumb, have forms for the same mnemonic that
2920 // do and don't have a cc_out optional-def operand. With some spot-checks
2921 // of the operand list, we can figure out which variant we're trying to
2922 // parse and adjust accordingly before actually matching. Reason number
2923 // #317 the table driven matcher doesn't fit well with the ARM instruction
2925 if (shouldOmitCCOutOperand(Mnemonic, Operands)) {
2926 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2927 Operands.erase(Operands.begin() + 1);
2931 // ARM mode 'blx' need special handling, as the register operand version
2932 // is predicable, but the label operand version is not. So, we can't rely
2933 // on the Mnemonic based checking to correctly figure out when to put
2934 // a CondCode operand in the list. If we're trying to match the label
2935 // version, remove the CondCode operand here.
2936 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2937 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2938 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2939 Operands.erase(Operands.begin() + 1);
2943 // The vector-compare-to-zero instructions have a literal token "#0" at
2944 // the end that comes to here as an immediate operand. Convert it to a
2945 // token to play nicely with the matcher.
2946 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
2947 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
2948 static_cast<ARMOperand*>(Operands[5])->isImm()) {
2949 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
2950 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
2951 if (CE && CE->getValue() == 0) {
2952 Operands.erase(Operands.begin() + 5);
2953 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
2960 // Validate context-sensitive operand constraints.
2961 // FIXME: We would really like to be able to tablegen'erate this.
2963 validateInstruction(MCInst &Inst,
2964 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2965 switch (Inst.getOpcode()) {
2968 case ARM::LDRD_POST:
2970 // Rt2 must be Rt + 1.
2971 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2972 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2974 return Error(Operands[3]->getStartLoc(),
2975 "destination operands must be sequential");
2979 // Rt2 must be Rt + 1.
2980 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2981 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2983 return Error(Operands[3]->getStartLoc(),
2984 "source operands must be sequential");
2988 case ARM::STRD_POST:
2990 // Rt2 must be Rt + 1.
2991 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2992 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
2994 return Error(Operands[3]->getStartLoc(),
2995 "source operands must be sequential");
3000 // width must be in range [1, 32-lsb]
3001 unsigned lsb = Inst.getOperand(2).getImm();
3002 unsigned widthm1 = Inst.getOperand(3).getImm();
3003 if (widthm1 >= 32 - lsb)
3004 return Error(Operands[5]->getStartLoc(),
3005 "bitfield width must be in range [1,32-lsb]");
3009 // Thumb LDM instructions are writeback iff the base register is not
3010 // in the register list.
3011 unsigned Rn = Inst.getOperand(0).getReg();
3012 bool doesWriteback = true;
3013 for (unsigned i = 3; i < Inst.getNumOperands(); ++i) {
3014 unsigned Reg = Inst.getOperand(i).getReg();
3016 doesWriteback = false;
3017 // Anything other than a low register isn't legal here.
3018 if (getARMRegisterNumbering(Reg) > 7)
3019 return Error(Operands[4]->getStartLoc(),
3020 "registers must be in range r0-r7");
3022 // If we should have writeback, then there should be a '!' token.
3023 if (doesWriteback &&
3024 (!static_cast<ARMOperand*>(Operands[3])->isToken() ||
3025 static_cast<ARMOperand*>(Operands[3])->getToken() != "!"))
3026 return Error(Operands[2]->getStartLoc(),
3027 "writeback operator '!' expected");
3037 processInstruction(MCInst &Inst,
3038 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3039 switch (Inst.getOpcode()) {
3040 case ARM::LDMIA_UPD:
3041 // If this is a load of a single register via a 'pop', then we should use
3042 // a post-indexed LDR instruction instead, per the ARM ARM.
3043 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3044 Inst.getNumOperands() == 5) {
3046 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3047 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3048 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3049 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3050 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3051 TmpInst.addOperand(MCOperand::CreateImm(4));
3052 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3053 TmpInst.addOperand(Inst.getOperand(3));
3057 case ARM::STMDB_UPD:
3058 // If this is a store of a single register via a 'push', then we should use
3059 // a pre-indexed STR instruction instead, per the ARM ARM.
3060 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3061 Inst.getNumOperands() == 5) {
3063 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3064 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3065 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3066 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3067 TmpInst.addOperand(MCOperand::CreateImm(-4));
3068 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3069 TmpInst.addOperand(Inst.getOperand(3));
3074 // If the immediate is in the range 0-7, we really wanted tADDi3.
3075 if (Inst.getOperand(3).getImm() < 8)
3076 Inst.setOpcode(ARM::tADDi3);
3079 // If the conditional is AL, we really want tB.
3080 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3081 Inst.setOpcode(ARM::tB);
3086 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3087 // the ARMInsts array) instead. Getting that here requires awkward
3088 // API changes, though. Better way?
3090 extern MCInstrDesc ARMInsts[];
3092 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3093 return ARMInsts[Opcode];
3096 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3097 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3098 // suffix depending on whether they're in an IT block or not.
3099 unsigned Opc = Inst.getOpcode();
3100 MCInstrDesc &MCID = getInstDesc(Opc);
3101 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3102 assert(MCID.hasOptionalDef() &&
3103 "optionally flag setting instruction missing optional def operand");
3104 assert(MCID.NumOperands == Inst.getNumOperands() &&
3105 "operand count mismatch!");
3106 // Find the optional-def operand (cc_out).
3109 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3112 // If we're parsing Thumb1, reject it completely.
3113 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3114 return Match_MnemonicFail;
3115 // If we're parsing Thumb2, which form is legal depends on whether we're
3117 // FIXME: We don't yet do IT blocks, so just always consider it to be
3118 // that we aren't in one until we do.
3119 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3120 return Match_RequiresITBlock;
3122 // Some high-register supporting Thumb1 encodings only allow both registers
3123 // to be from r0-r7 when in Thumb2.
3124 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3125 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3126 isARMLowRegister(Inst.getOperand(2).getReg()))
3127 return Match_RequiresThumb2;
3128 // Others only require ARMv6 or later.
3129 else if (Opc == ARM::tMOVr && isThumbOne() &&
3130 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3131 isARMLowRegister(Inst.getOperand(1).getReg()))
3132 return Match_RequiresV6;
3133 return Match_Success;
3137 MatchAndEmitInstruction(SMLoc IDLoc,
3138 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3142 unsigned MatchResult;
3143 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3144 switch (MatchResult) {
3147 // Context sensitive operand constraints aren't handled by the matcher,
3148 // so check them here.
3149 if (validateInstruction(Inst, Operands))
3152 // Some instructions need post-processing to, for example, tweak which
3153 // encoding is selected.
3154 processInstruction(Inst, Operands);
3156 Out.EmitInstruction(Inst);
3158 case Match_MissingFeature:
3159 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3161 case Match_InvalidOperand: {
3162 SMLoc ErrorLoc = IDLoc;
3163 if (ErrorInfo != ~0U) {
3164 if (ErrorInfo >= Operands.size())
3165 return Error(IDLoc, "too few operands for instruction");
3167 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3168 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3171 return Error(ErrorLoc, "invalid operand for instruction");
3173 case Match_MnemonicFail:
3174 return Error(IDLoc, "invalid instruction");
3175 case Match_ConversionFail:
3176 return Error(IDLoc, "unable to convert operands to instruction");
3177 case Match_RequiresITBlock:
3178 return Error(IDLoc, "instruction only valid inside IT block");
3179 case Match_RequiresV6:
3180 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3181 case Match_RequiresThumb2:
3182 return Error(IDLoc, "instruction variant requires Thumb2");
3185 llvm_unreachable("Implement any new match types added!");
3189 /// parseDirective parses the arm specific directives
3190 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3191 StringRef IDVal = DirectiveID.getIdentifier();
3192 if (IDVal == ".word")
3193 return parseDirectiveWord(4, DirectiveID.getLoc());
3194 else if (IDVal == ".thumb")
3195 return parseDirectiveThumb(DirectiveID.getLoc());
3196 else if (IDVal == ".thumb_func")
3197 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3198 else if (IDVal == ".code")
3199 return parseDirectiveCode(DirectiveID.getLoc());
3200 else if (IDVal == ".syntax")
3201 return parseDirectiveSyntax(DirectiveID.getLoc());
3205 /// parseDirectiveWord
3206 /// ::= .word [ expression (, expression)* ]
3207 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3208 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3210 const MCExpr *Value;
3211 if (getParser().ParseExpression(Value))
3214 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3216 if (getLexer().is(AsmToken::EndOfStatement))
3219 // FIXME: Improve diagnostic.
3220 if (getLexer().isNot(AsmToken::Comma))
3221 return Error(L, "unexpected token in directive");
3230 /// parseDirectiveThumb
3232 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3233 if (getLexer().isNot(AsmToken::EndOfStatement))
3234 return Error(L, "unexpected token in directive");
3237 // TODO: set thumb mode
3238 // TODO: tell the MC streamer the mode
3239 // getParser().getStreamer().Emit???();
3243 /// parseDirectiveThumbFunc
3244 /// ::= .thumbfunc symbol_name
3245 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3246 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3247 bool isMachO = MAI.hasSubsectionsViaSymbols();
3250 // Darwin asm has function name after .thumb_func direction
3253 const AsmToken &Tok = Parser.getTok();
3254 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3255 return Error(L, "unexpected token in .thumb_func directive");
3256 Name = Tok.getString();
3257 Parser.Lex(); // Consume the identifier token.
3260 if (getLexer().isNot(AsmToken::EndOfStatement))
3261 return Error(L, "unexpected token in directive");
3264 // FIXME: assuming function name will be the line following .thumb_func
3266 Name = Parser.getTok().getString();
3269 // Mark symbol as a thumb symbol.
3270 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3271 getParser().getStreamer().EmitThumbFunc(Func);
3275 /// parseDirectiveSyntax
3276 /// ::= .syntax unified | divided
3277 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3278 const AsmToken &Tok = Parser.getTok();
3279 if (Tok.isNot(AsmToken::Identifier))
3280 return Error(L, "unexpected token in .syntax directive");
3281 StringRef Mode = Tok.getString();
3282 if (Mode == "unified" || Mode == "UNIFIED")
3284 else if (Mode == "divided" || Mode == "DIVIDED")
3285 return Error(L, "'.syntax divided' arm asssembly not supported");
3287 return Error(L, "unrecognized syntax mode in .syntax directive");
3289 if (getLexer().isNot(AsmToken::EndOfStatement))
3290 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3293 // TODO tell the MC streamer the mode
3294 // getParser().getStreamer().Emit???();
3298 /// parseDirectiveCode
3299 /// ::= .code 16 | 32
3300 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3301 const AsmToken &Tok = Parser.getTok();
3302 if (Tok.isNot(AsmToken::Integer))
3303 return Error(L, "unexpected token in .code directive");
3304 int64_t Val = Parser.getTok().getIntVal();
3310 return Error(L, "invalid operand to .code directive");
3312 if (getLexer().isNot(AsmToken::EndOfStatement))
3313 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3319 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3324 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3331 extern "C" void LLVMInitializeARMAsmLexer();
3333 /// Force static initialization.
3334 extern "C" void LLVMInitializeARMAsmParser() {
3335 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3336 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3337 LLVMInitializeARMAsmLexer();
3340 #define GET_REGISTER_MATCHER
3341 #define GET_MATCHER_IMPLEMENTATION
3342 #include "ARMGenAsmMatcher.inc"