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 ARMII::AddrMode AddrMode);
56 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
57 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
58 const MCExpr *applyPrefixToExpr(const MCExpr *E,
59 MCSymbolRefExpr::VariantKind Variant);
62 bool parseMemoryOffsetReg(bool &Negative,
63 bool &OffsetRegShifted,
64 enum ARM_AM::ShiftOpc &ShiftType,
65 const MCExpr *&ShiftAmount,
66 const MCExpr *&Offset,
70 bool parseShift(enum ARM_AM::ShiftOpc &St,
71 const MCExpr *&ShiftAmount, SMLoc &E);
72 bool parseDirectiveWord(unsigned Size, SMLoc L);
73 bool parseDirectiveThumb(SMLoc L);
74 bool parseDirectiveThumbFunc(SMLoc L);
75 bool parseDirectiveCode(SMLoc L);
76 bool parseDirectiveSyntax(SMLoc L);
78 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
79 bool &CarrySetting, unsigned &ProcessorIMod);
80 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
81 bool &CanAcceptPredicationCode);
83 bool isThumb() const {
84 // FIXME: Can tablegen auto-generate this?
85 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
87 bool isThumbOne() const {
88 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
91 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
92 setAvailableFeatures(FB);
95 /// @name Auto-generated Match Functions
98 #define GET_ASSEMBLER_HEADER
99 #include "ARMGenAsmMatcher.inc"
103 OperandMatchResultTy parseCoprocNumOperand(
104 SmallVectorImpl<MCParsedAsmOperand*>&);
105 OperandMatchResultTy parseCoprocRegOperand(
106 SmallVectorImpl<MCParsedAsmOperand*>&);
107 OperandMatchResultTy parseMemBarrierOptOperand(
108 SmallVectorImpl<MCParsedAsmOperand*>&);
109 OperandMatchResultTy parseProcIFlagsOperand(
110 SmallVectorImpl<MCParsedAsmOperand*>&);
111 OperandMatchResultTy parseMSRMaskOperand(
112 SmallVectorImpl<MCParsedAsmOperand*>&);
113 OperandMatchResultTy parseMemMode2Operand(
114 SmallVectorImpl<MCParsedAsmOperand*>&);
115 OperandMatchResultTy parseMemMode3Operand(
116 SmallVectorImpl<MCParsedAsmOperand*>&);
117 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
118 StringRef Op, int Low, int High);
119 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
120 return parsePKHImm(O, "lsl", 0, 31);
122 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
123 return parsePKHImm(O, "asr", 1, 32);
125 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
126 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
128 // Asm Match Converter Methods
129 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
130 const SmallVectorImpl<MCParsedAsmOperand*> &);
131 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
132 const SmallVectorImpl<MCParsedAsmOperand*> &);
133 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
134 const SmallVectorImpl<MCParsedAsmOperand*> &);
135 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
136 const SmallVectorImpl<MCParsedAsmOperand*> &);
139 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
140 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
141 MCAsmParserExtension::Initialize(_Parser);
143 // Initialize the set of available features.
144 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
147 // Implementation of the MCTargetAsmParser interface:
148 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
149 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
150 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
151 bool ParseDirective(AsmToken DirectiveID);
153 bool MatchAndEmitInstruction(SMLoc IDLoc,
154 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
157 } // end anonymous namespace
160 // FIXME: TableGen this?
161 extern MCRegisterClass ARMMCRegisterClasses[]; // In ARMGenRegisterInfo.inc.
166 /// ARMOperand - Instances of this class represent a parsed ARM machine
168 class ARMOperand : public MCParsedAsmOperand {
189 SMLoc StartLoc, EndLoc;
190 SmallVector<unsigned, 8> Registers;
194 ARMCC::CondCodes Val;
206 ARM_PROC::IFlags Val;
226 /// Combined record for all forms of ARM address expressions.
228 ARMII::AddrMode AddrMode;
231 unsigned RegNum; ///< Offset register num, when OffsetIsReg.
232 const MCExpr *Value; ///< Offset value, when !OffsetIsReg.
234 const MCExpr *ShiftAmount; // used when OffsetRegShifted is true
235 enum ARM_AM::ShiftOpc ShiftType; // used when OffsetRegShifted is true
236 unsigned OffsetRegShifted : 1; // only used when OffsetIsReg is true
237 unsigned Preindexed : 1;
238 unsigned Postindexed : 1;
239 unsigned OffsetIsReg : 1;
240 unsigned Negative : 1; // only used when OffsetIsReg is true
241 unsigned Writeback : 1;
249 ARM_AM::ShiftOpc ShiftTy;
255 ARM_AM::ShiftOpc ShiftTy;
261 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
263 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
265 StartLoc = o.StartLoc;
279 case DPRRegisterList:
280 case SPRRegisterList:
281 Registers = o.Registers;
302 case ShifterImmediate:
303 ShifterImm = o.ShifterImm;
305 case ShiftedRegister:
306 RegShiftedReg = o.RegShiftedReg;
308 case ShiftedImmediate:
309 RegShiftedImm = o.RegShiftedImm;
314 /// getStartLoc - Get the location of the first token of this operand.
315 SMLoc getStartLoc() const { return StartLoc; }
316 /// getEndLoc - Get the location of the last token of this operand.
317 SMLoc getEndLoc() const { return EndLoc; }
319 ARMCC::CondCodes getCondCode() const {
320 assert(Kind == CondCode && "Invalid access!");
324 unsigned getCoproc() const {
325 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
329 StringRef getToken() const {
330 assert(Kind == Token && "Invalid access!");
331 return StringRef(Tok.Data, Tok.Length);
334 unsigned getReg() const {
335 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
339 const SmallVectorImpl<unsigned> &getRegList() const {
340 assert((Kind == RegisterList || Kind == DPRRegisterList ||
341 Kind == SPRRegisterList) && "Invalid access!");
345 const MCExpr *getImm() const {
346 assert(Kind == Immediate && "Invalid access!");
350 ARM_MB::MemBOpt getMemBarrierOpt() const {
351 assert(Kind == MemBarrierOpt && "Invalid access!");
355 ARM_PROC::IFlags getProcIFlags() const {
356 assert(Kind == ProcIFlags && "Invalid access!");
360 unsigned getMSRMask() const {
361 assert(Kind == MSRMask && "Invalid access!");
365 /// @name Memory Operand Accessors
367 ARMII::AddrMode getMemAddrMode() const {
370 unsigned getMemBaseRegNum() const {
371 return Mem.BaseRegNum;
373 unsigned getMemOffsetRegNum() const {
374 assert(Mem.OffsetIsReg && "Invalid access!");
375 return Mem.Offset.RegNum;
377 const MCExpr *getMemOffset() const {
378 assert(!Mem.OffsetIsReg && "Invalid access!");
379 return Mem.Offset.Value;
381 unsigned getMemOffsetRegShifted() const {
382 assert(Mem.OffsetIsReg && "Invalid access!");
383 return Mem.OffsetRegShifted;
385 const MCExpr *getMemShiftAmount() const {
386 assert(Mem.OffsetIsReg && Mem.OffsetRegShifted && "Invalid access!");
387 return Mem.ShiftAmount;
389 enum ARM_AM::ShiftOpc getMemShiftType() const {
390 assert(Mem.OffsetIsReg && Mem.OffsetRegShifted && "Invalid access!");
391 return Mem.ShiftType;
393 bool getMemPreindexed() const { return Mem.Preindexed; }
394 bool getMemPostindexed() const { return Mem.Postindexed; }
395 bool getMemOffsetIsReg() const { return Mem.OffsetIsReg; }
396 bool getMemNegative() const { return Mem.Negative; }
397 bool getMemWriteback() const { return Mem.Writeback; }
401 bool isCoprocNum() const { return Kind == CoprocNum; }
402 bool isCoprocReg() const { return Kind == CoprocReg; }
403 bool isCondCode() const { return Kind == CondCode; }
404 bool isCCOut() const { return Kind == CCOut; }
405 bool isImm() const { return Kind == Immediate; }
406 bool isImm0_255() const {
407 if (Kind != Immediate)
409 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
410 if (!CE) return false;
411 int64_t Value = CE->getValue();
412 return Value >= 0 && Value < 256;
414 bool isImm0_7() const {
415 if (Kind != Immediate)
417 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
418 if (!CE) return false;
419 int64_t Value = CE->getValue();
420 return Value >= 0 && Value < 8;
422 bool isImm0_15() const {
423 if (Kind != Immediate)
425 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
426 if (!CE) return false;
427 int64_t Value = CE->getValue();
428 return Value >= 0 && Value < 16;
430 bool isImm0_31() const {
431 if (Kind != Immediate)
433 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
434 if (!CE) return false;
435 int64_t Value = CE->getValue();
436 return Value >= 0 && Value < 32;
438 bool isImm1_16() const {
439 if (Kind != Immediate)
441 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
442 if (!CE) return false;
443 int64_t Value = CE->getValue();
444 return Value > 0 && Value < 17;
446 bool isImm1_32() const {
447 if (Kind != Immediate)
449 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
450 if (!CE) return false;
451 int64_t Value = CE->getValue();
452 return Value > 0 && Value < 33;
454 bool isImm0_65535() const {
455 if (Kind != Immediate)
457 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
458 if (!CE) return false;
459 int64_t Value = CE->getValue();
460 return Value >= 0 && Value < 65536;
462 bool isImm0_65535Expr() const {
463 if (Kind != Immediate)
465 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
466 // If it's not a constant expression, it'll generate a fixup and be
468 if (!CE) return true;
469 int64_t Value = CE->getValue();
470 return Value >= 0 && Value < 65536;
472 bool isImm24bit() const {
473 if (Kind != Immediate)
475 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
476 if (!CE) return false;
477 int64_t Value = CE->getValue();
478 return Value >= 0 && Value <= 0xffffff;
480 bool isPKHLSLImm() const {
481 if (Kind != Immediate)
483 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
484 if (!CE) return false;
485 int64_t Value = CE->getValue();
486 return Value >= 0 && Value < 32;
488 bool isPKHASRImm() const {
489 if (Kind != Immediate)
491 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
492 if (!CE) return false;
493 int64_t Value = CE->getValue();
494 return Value > 0 && Value <= 32;
496 bool isARMSOImm() const {
497 if (Kind != Immediate)
499 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
500 if (!CE) return false;
501 int64_t Value = CE->getValue();
502 return ARM_AM::getSOImmVal(Value) != -1;
504 bool isT2SOImm() const {
505 if (Kind != Immediate)
507 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
508 if (!CE) return false;
509 int64_t Value = CE->getValue();
510 return ARM_AM::getT2SOImmVal(Value) != -1;
512 bool isSetEndImm() const {
513 if (Kind != Immediate)
515 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
516 if (!CE) return false;
517 int64_t Value = CE->getValue();
518 return Value == 1 || Value == 0;
520 bool isReg() const { return Kind == Register; }
521 bool isRegList() const { return Kind == RegisterList; }
522 bool isDPRRegList() const { return Kind == DPRRegisterList; }
523 bool isSPRRegList() const { return Kind == SPRRegisterList; }
524 bool isToken() const { return Kind == Token; }
525 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
526 bool isMemory() const { return Kind == Memory; }
527 bool isShifterImm() const { return Kind == ShifterImmediate; }
528 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
529 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
530 bool isMemMode2() const {
531 if (getMemAddrMode() != ARMII::AddrMode2)
534 if (getMemOffsetIsReg())
537 if (getMemNegative() &&
538 !(getMemPostindexed() || getMemPreindexed()))
541 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
542 if (!CE) return false;
543 int64_t Value = CE->getValue();
545 // The offset must be in the range 0-4095 (imm12).
546 if (Value > 4095 || Value < -4095)
551 bool isMemMode3() const {
552 if (getMemAddrMode() != ARMII::AddrMode3)
555 if (getMemOffsetIsReg()) {
556 if (getMemOffsetRegShifted())
557 return false; // No shift with offset reg allowed
561 if (getMemNegative() &&
562 !(getMemPostindexed() || getMemPreindexed()))
565 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
566 if (!CE) return false;
567 int64_t Value = CE->getValue();
569 // The offset must be in the range 0-255 (imm8).
570 if (Value > 255 || Value < -255)
575 bool isMemMode5() const {
576 if (!isMemory() || getMemOffsetIsReg() || getMemWriteback() ||
580 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
581 if (!CE) return false;
583 // The offset must be a multiple of 4 in the range 0-1020.
584 int64_t Value = CE->getValue();
585 return ((Value & 0x3) == 0 && Value <= 1020 && Value >= -1020);
587 bool isMemMode7() const {
589 getMemPreindexed() ||
590 getMemPostindexed() ||
591 getMemOffsetIsReg() ||
596 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
597 if (!CE) return false;
604 bool isMemModeRegThumb() const {
605 if (!isMemory() || !getMemOffsetIsReg() || getMemWriteback())
609 bool isMemModeImmThumb() const {
610 if (!isMemory() || getMemOffsetIsReg() || getMemWriteback())
613 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
614 if (!CE) return false;
616 // The offset must be a multiple of 4 in the range 0-124.
617 uint64_t Value = CE->getValue();
618 return ((Value & 0x3) == 0 && Value <= 124);
620 bool isMSRMask() const { return Kind == MSRMask; }
621 bool isProcIFlags() const { return Kind == ProcIFlags; }
623 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
624 // Add as immediates when possible. Null MCExpr = 0.
626 Inst.addOperand(MCOperand::CreateImm(0));
627 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
628 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
630 Inst.addOperand(MCOperand::CreateExpr(Expr));
633 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
634 assert(N == 2 && "Invalid number of operands!");
635 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
636 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
637 Inst.addOperand(MCOperand::CreateReg(RegNum));
640 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
641 assert(N == 1 && "Invalid number of operands!");
642 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
645 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
646 assert(N == 1 && "Invalid number of operands!");
647 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
650 void addCCOutOperands(MCInst &Inst, unsigned N) const {
651 assert(N == 1 && "Invalid number of operands!");
652 Inst.addOperand(MCOperand::CreateReg(getReg()));
655 void addRegOperands(MCInst &Inst, unsigned N) const {
656 assert(N == 1 && "Invalid number of operands!");
657 Inst.addOperand(MCOperand::CreateReg(getReg()));
660 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
661 assert(N == 3 && "Invalid number of operands!");
662 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
663 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
664 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
665 Inst.addOperand(MCOperand::CreateImm(
666 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
669 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
670 assert(N == 2 && "Invalid number of operands!");
671 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
672 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
673 Inst.addOperand(MCOperand::CreateImm(
674 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
678 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
679 assert(N == 1 && "Invalid number of operands!");
680 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
684 void addRegListOperands(MCInst &Inst, unsigned N) const {
685 assert(N == 1 && "Invalid number of operands!");
686 const SmallVectorImpl<unsigned> &RegList = getRegList();
687 for (SmallVectorImpl<unsigned>::const_iterator
688 I = RegList.begin(), E = RegList.end(); I != E; ++I)
689 Inst.addOperand(MCOperand::CreateReg(*I));
692 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
693 addRegListOperands(Inst, N);
696 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
697 addRegListOperands(Inst, N);
700 void addImmOperands(MCInst &Inst, unsigned N) const {
701 assert(N == 1 && "Invalid number of operands!");
702 addExpr(Inst, getImm());
705 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
706 assert(N == 1 && "Invalid number of operands!");
707 addExpr(Inst, getImm());
710 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
711 assert(N == 1 && "Invalid number of operands!");
712 addExpr(Inst, getImm());
715 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
716 assert(N == 1 && "Invalid number of operands!");
717 addExpr(Inst, getImm());
720 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
721 assert(N == 1 && "Invalid number of operands!");
722 addExpr(Inst, getImm());
725 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
726 assert(N == 1 && "Invalid number of operands!");
727 // The constant encodes as the immediate-1, and we store in the instruction
728 // the bits as encoded, so subtract off one here.
729 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
730 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
733 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
734 assert(N == 1 && "Invalid number of operands!");
735 // The constant encodes as the immediate-1, and we store in the instruction
736 // the bits as encoded, so subtract off one here.
737 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
738 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
741 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
742 assert(N == 1 && "Invalid number of operands!");
743 addExpr(Inst, getImm());
746 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
747 assert(N == 1 && "Invalid number of operands!");
748 addExpr(Inst, getImm());
751 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
752 assert(N == 1 && "Invalid number of operands!");
753 addExpr(Inst, getImm());
756 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
757 assert(N == 1 && "Invalid number of operands!");
758 addExpr(Inst, getImm());
761 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
762 assert(N == 1 && "Invalid number of operands!");
763 // An ASR value of 32 encodes as 0, so that's how we want to add it to
764 // the instruction as well.
765 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
766 int Val = CE->getValue();
767 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
770 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
771 assert(N == 1 && "Invalid number of operands!");
772 addExpr(Inst, getImm());
775 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
776 assert(N == 1 && "Invalid number of operands!");
777 addExpr(Inst, getImm());
780 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
781 assert(N == 1 && "Invalid number of operands!");
782 addExpr(Inst, getImm());
785 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
786 assert(N == 1 && "Invalid number of operands!");
787 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
790 void addMemMode7Operands(MCInst &Inst, unsigned N) const {
791 assert(N == 1 && isMemMode7() && "Invalid number of operands!");
792 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
794 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
796 assert((CE || CE->getValue() == 0) &&
797 "No offset operand support in mode 7");
800 void addMemMode2Operands(MCInst &Inst, unsigned N) const {
801 assert(isMemMode2() && "Invalid mode or number of operands!");
802 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
803 unsigned IdxMode = (getMemPreindexed() | getMemPostindexed() << 1);
805 if (getMemOffsetIsReg()) {
806 Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
808 ARM_AM::AddrOpc AMOpc = getMemNegative() ? ARM_AM::sub : ARM_AM::add;
809 ARM_AM::ShiftOpc ShOpc = ARM_AM::no_shift;
810 int64_t ShiftAmount = 0;
812 if (getMemOffsetRegShifted()) {
813 ShOpc = getMemShiftType();
814 const MCConstantExpr *CE =
815 dyn_cast<MCConstantExpr>(getMemShiftAmount());
816 ShiftAmount = CE->getValue();
819 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM2Opc(AMOpc, ShiftAmount,
824 // Create a operand placeholder to always yield the same number of operands.
825 Inst.addOperand(MCOperand::CreateReg(0));
827 // FIXME: #-0 is encoded differently than #0. Does the parser preserve
829 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
830 assert(CE && "Non-constant mode 2 offset operand!");
831 int64_t Offset = CE->getValue();
834 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM2Opc(ARM_AM::add,
835 Offset, ARM_AM::no_shift, IdxMode)));
837 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM2Opc(ARM_AM::sub,
838 -Offset, ARM_AM::no_shift, IdxMode)));
841 void addMemMode3Operands(MCInst &Inst, unsigned N) const {
842 assert(isMemMode3() && "Invalid mode or number of operands!");
843 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
844 unsigned IdxMode = (getMemPreindexed() | getMemPostindexed() << 1);
846 if (getMemOffsetIsReg()) {
847 Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
849 ARM_AM::AddrOpc AMOpc = getMemNegative() ? ARM_AM::sub : ARM_AM::add;
850 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(AMOpc, 0,
855 // Create a operand placeholder to always yield the same number of operands.
856 Inst.addOperand(MCOperand::CreateReg(0));
858 // FIXME: #-0 is encoded differently than #0. Does the parser preserve
860 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
861 assert(CE && "Non-constant mode 3 offset operand!");
862 int64_t Offset = CE->getValue();
865 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(ARM_AM::add,
868 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM3Opc(ARM_AM::sub,
872 void addMemMode5Operands(MCInst &Inst, unsigned N) const {
873 assert(N == 2 && isMemMode5() && "Invalid number of operands!");
875 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
876 assert(!getMemOffsetIsReg() && "Invalid mode 5 operand");
878 // FIXME: #-0 is encoded differently than #0. Does the parser preserve
880 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
881 assert(CE && "Non-constant mode 5 offset operand!");
883 // The MCInst offset operand doesn't include the low two bits (like
884 // the instruction encoding).
885 int64_t Offset = CE->getValue() / 4;
887 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::add,
890 Inst.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(ARM_AM::sub,
894 void addMemModeRegThumbOperands(MCInst &Inst, unsigned N) const {
895 assert(N == 2 && isMemModeRegThumb() && "Invalid number of operands!");
896 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
897 Inst.addOperand(MCOperand::CreateReg(getMemOffsetRegNum()));
900 void addMemModeImmThumbOperands(MCInst &Inst, unsigned N) const {
901 assert(N == 2 && isMemModeImmThumb() && "Invalid number of operands!");
902 Inst.addOperand(MCOperand::CreateReg(getMemBaseRegNum()));
903 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemOffset());
904 assert(CE && "Non-constant mode offset operand!");
905 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
908 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
909 assert(N == 1 && "Invalid number of operands!");
910 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
913 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
914 assert(N == 1 && "Invalid number of operands!");
915 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
918 virtual void print(raw_ostream &OS) const;
920 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
921 ARMOperand *Op = new ARMOperand(CondCode);
928 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
929 ARMOperand *Op = new ARMOperand(CoprocNum);
930 Op->Cop.Val = CopVal;
936 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
937 ARMOperand *Op = new ARMOperand(CoprocReg);
938 Op->Cop.Val = CopVal;
944 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
945 ARMOperand *Op = new ARMOperand(CCOut);
946 Op->Reg.RegNum = RegNum;
952 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
953 ARMOperand *Op = new ARMOperand(Token);
954 Op->Tok.Data = Str.data();
955 Op->Tok.Length = Str.size();
961 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
962 ARMOperand *Op = new ARMOperand(Register);
963 Op->Reg.RegNum = RegNum;
969 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
974 ARMOperand *Op = new ARMOperand(ShiftedRegister);
975 Op->RegShiftedReg.ShiftTy = ShTy;
976 Op->RegShiftedReg.SrcReg = SrcReg;
977 Op->RegShiftedReg.ShiftReg = ShiftReg;
978 Op->RegShiftedReg.ShiftImm = ShiftImm;
984 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
988 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
989 Op->RegShiftedImm.ShiftTy = ShTy;
990 Op->RegShiftedImm.SrcReg = SrcReg;
991 Op->RegShiftedImm.ShiftImm = ShiftImm;
997 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
999 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1000 Op->ShifterImm.isASR = isASR;
1001 Op->ShifterImm.Imm = Imm;
1008 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1009 SMLoc StartLoc, SMLoc EndLoc) {
1010 KindTy Kind = RegisterList;
1012 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1013 contains(Regs.front().first))
1014 Kind = DPRRegisterList;
1015 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1016 contains(Regs.front().first))
1017 Kind = SPRRegisterList;
1019 ARMOperand *Op = new ARMOperand(Kind);
1020 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1021 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1022 Op->Registers.push_back(I->first);
1023 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1024 Op->StartLoc = StartLoc;
1025 Op->EndLoc = EndLoc;
1029 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1030 ARMOperand *Op = new ARMOperand(Immediate);
1037 static ARMOperand *CreateMem(ARMII::AddrMode AddrMode, unsigned BaseRegNum,
1038 bool OffsetIsReg, const MCExpr *Offset,
1039 int OffsetRegNum, bool OffsetRegShifted,
1040 enum ARM_AM::ShiftOpc ShiftType,
1041 const MCExpr *ShiftAmount, bool Preindexed,
1042 bool Postindexed, bool Negative, bool Writeback,
1044 assert((OffsetRegNum == -1 || OffsetIsReg) &&
1045 "OffsetRegNum must imply OffsetIsReg!");
1046 assert((!OffsetRegShifted || OffsetIsReg) &&
1047 "OffsetRegShifted must imply OffsetIsReg!");
1048 assert((Offset || OffsetIsReg) &&
1049 "Offset must exists unless register offset is used!");
1050 assert((!ShiftAmount || (OffsetIsReg && OffsetRegShifted)) &&
1051 "Cannot have shift amount without shifted register offset!");
1052 assert((!Offset || !OffsetIsReg) &&
1053 "Cannot have expression offset and register offset!");
1055 ARMOperand *Op = new ARMOperand(Memory);
1056 Op->Mem.AddrMode = AddrMode;
1057 Op->Mem.BaseRegNum = BaseRegNum;
1058 Op->Mem.OffsetIsReg = OffsetIsReg;
1060 Op->Mem.Offset.RegNum = OffsetRegNum;
1062 Op->Mem.Offset.Value = Offset;
1063 Op->Mem.OffsetRegShifted = OffsetRegShifted;
1064 Op->Mem.ShiftType = ShiftType;
1065 Op->Mem.ShiftAmount = ShiftAmount;
1066 Op->Mem.Preindexed = Preindexed;
1067 Op->Mem.Postindexed = Postindexed;
1068 Op->Mem.Negative = Negative;
1069 Op->Mem.Writeback = Writeback;
1076 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1077 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1078 Op->MBOpt.Val = Opt;
1084 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1085 ARMOperand *Op = new ARMOperand(ProcIFlags);
1086 Op->IFlags.Val = IFlags;
1092 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1093 ARMOperand *Op = new ARMOperand(MSRMask);
1094 Op->MMask.Val = MMask;
1101 } // end anonymous namespace.
1103 void ARMOperand::print(raw_ostream &OS) const {
1106 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1109 OS << "<ccout " << getReg() << ">";
1112 OS << "<coprocessor number: " << getCoproc() << ">";
1115 OS << "<coprocessor register: " << getCoproc() << ">";
1118 OS << "<mask: " << getMSRMask() << ">";
1121 getImm()->print(OS);
1124 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1128 << "am:" << ARMII::AddrModeToString(getMemAddrMode())
1129 << " base:" << getMemBaseRegNum();
1130 if (getMemOffsetIsReg()) {
1131 OS << " offset:<register " << getMemOffsetRegNum();
1132 if (getMemOffsetRegShifted()) {
1133 OS << " offset-shift-type:" << getMemShiftType();
1134 OS << " offset-shift-amount:" << *getMemShiftAmount();
1137 OS << " offset:" << *getMemOffset();
1139 if (getMemOffsetIsReg())
1140 OS << " (offset-is-reg)";
1141 if (getMemPreindexed())
1142 OS << " (pre-indexed)";
1143 if (getMemPostindexed())
1144 OS << " (post-indexed)";
1145 if (getMemNegative())
1146 OS << " (negative)";
1147 if (getMemWriteback())
1148 OS << " (writeback)";
1152 OS << "<ARM_PROC::";
1153 unsigned IFlags = getProcIFlags();
1154 for (int i=2; i >= 0; --i)
1155 if (IFlags & (1 << i))
1156 OS << ARM_PROC::IFlagsToString(1 << i);
1161 OS << "<register " << getReg() << ">";
1163 case ShifterImmediate:
1164 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1165 << " #" << ShifterImm.Imm << ">";
1167 case ShiftedRegister:
1168 OS << "<so_reg_reg "
1169 << RegShiftedReg.SrcReg
1170 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1171 << ", " << RegShiftedReg.ShiftReg << ", "
1172 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1175 case ShiftedImmediate:
1176 OS << "<so_reg_imm "
1177 << RegShiftedImm.SrcReg
1178 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1179 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1183 case DPRRegisterList:
1184 case SPRRegisterList: {
1185 OS << "<register_list ";
1187 const SmallVectorImpl<unsigned> &RegList = getRegList();
1188 for (SmallVectorImpl<unsigned>::const_iterator
1189 I = RegList.begin(), E = RegList.end(); I != E; ) {
1191 if (++I < E) OS << ", ";
1198 OS << "'" << getToken() << "'";
1203 /// @name Auto-generated Match Functions
1206 static unsigned MatchRegisterName(StringRef Name);
1210 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1211 SMLoc &StartLoc, SMLoc &EndLoc) {
1212 RegNo = tryParseRegister();
1214 return (RegNo == (unsigned)-1);
1217 /// Try to parse a register name. The token must be an Identifier when called,
1218 /// and if it is a register name the token is eaten and the register number is
1219 /// returned. Otherwise return -1.
1221 int ARMAsmParser::tryParseRegister() {
1222 const AsmToken &Tok = Parser.getTok();
1223 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1225 // FIXME: Validate register for the current architecture; we have to do
1226 // validation later, so maybe there is no need for this here.
1227 std::string upperCase = Tok.getString().str();
1228 std::string lowerCase = LowercaseString(upperCase);
1229 unsigned RegNum = MatchRegisterName(lowerCase);
1231 RegNum = StringSwitch<unsigned>(lowerCase)
1232 .Case("r13", ARM::SP)
1233 .Case("r14", ARM::LR)
1234 .Case("r15", ARM::PC)
1235 .Case("ip", ARM::R12)
1238 if (!RegNum) return -1;
1240 Parser.Lex(); // Eat identifier token.
1244 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1245 // If a recoverable error occurs, return 1. If an irrecoverable error
1246 // occurs, return -1. An irrecoverable error is one where tokens have been
1247 // consumed in the process of trying to parse the shifter (i.e., when it is
1248 // indeed a shifter operand, but malformed).
1249 int ARMAsmParser::tryparseShiftRegister(
1250 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1251 SMLoc S = Parser.getTok().getLoc();
1252 const AsmToken &Tok = Parser.getTok();
1253 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1255 std::string upperCase = Tok.getString().str();
1256 std::string lowerCase = LowercaseString(upperCase);
1257 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1258 .Case("lsl", ARM_AM::lsl)
1259 .Case("lsr", ARM_AM::lsr)
1260 .Case("asr", ARM_AM::asr)
1261 .Case("ror", ARM_AM::ror)
1262 .Case("rrx", ARM_AM::rrx)
1263 .Default(ARM_AM::no_shift);
1265 if (ShiftTy == ARM_AM::no_shift)
1268 Parser.Lex(); // Eat the operator.
1270 // The source register for the shift has already been added to the
1271 // operand list, so we need to pop it off and combine it into the shifted
1272 // register operand instead.
1273 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1274 if (!PrevOp->isReg())
1275 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1276 int SrcReg = PrevOp->getReg();
1279 if (ShiftTy == ARM_AM::rrx) {
1280 // RRX Doesn't have an explicit shift amount. The encoder expects
1281 // the shift register to be the same as the source register. Seems odd,
1285 // Figure out if this is shifted by a constant or a register (for non-RRX).
1286 if (Parser.getTok().is(AsmToken::Hash)) {
1287 Parser.Lex(); // Eat hash.
1288 SMLoc ImmLoc = Parser.getTok().getLoc();
1289 const MCExpr *ShiftExpr = 0;
1290 if (getParser().ParseExpression(ShiftExpr)) {
1291 Error(ImmLoc, "invalid immediate shift value");
1294 // The expression must be evaluatable as an immediate.
1295 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1297 Error(ImmLoc, "invalid immediate shift value");
1300 // Range check the immediate.
1301 // lsl, ror: 0 <= imm <= 31
1302 // lsr, asr: 0 <= imm <= 32
1303 Imm = CE->getValue();
1305 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1306 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1307 Error(ImmLoc, "immediate shift value out of range");
1310 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1311 ShiftReg = tryParseRegister();
1312 SMLoc L = Parser.getTok().getLoc();
1313 if (ShiftReg == -1) {
1314 Error (L, "expected immediate or register in shift operand");
1318 Error (Parser.getTok().getLoc(),
1319 "expected immediate or register in shift operand");
1324 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1325 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1327 S, Parser.getTok().getLoc()));
1329 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1330 S, Parser.getTok().getLoc()));
1336 /// Try to parse a register name. The token must be an Identifier when called.
1337 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1338 /// if there is a "writeback". 'true' if it's not a register.
1340 /// TODO this is likely to change to allow different register types and or to
1341 /// parse for a specific register type.
1343 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1344 SMLoc S = Parser.getTok().getLoc();
1345 int RegNo = tryParseRegister();
1349 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1351 const AsmToken &ExclaimTok = Parser.getTok();
1352 if (ExclaimTok.is(AsmToken::Exclaim)) {
1353 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1354 ExclaimTok.getLoc()));
1355 Parser.Lex(); // Eat exclaim token
1361 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1362 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1364 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1365 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1367 switch (Name.size()) {
1370 if (Name[0] != CoprocOp)
1387 if (Name[0] != CoprocOp || Name[1] != '1')
1391 case '0': return 10;
1392 case '1': return 11;
1393 case '2': return 12;
1394 case '3': return 13;
1395 case '4': return 14;
1396 case '5': return 15;
1404 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1405 /// token must be an Identifier when called, and if it is a coprocessor
1406 /// number, the token is eaten and the operand is added to the operand list.
1407 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1408 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1409 SMLoc S = Parser.getTok().getLoc();
1410 const AsmToken &Tok = Parser.getTok();
1411 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1413 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1415 return MatchOperand_NoMatch;
1417 Parser.Lex(); // Eat identifier token.
1418 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1419 return MatchOperand_Success;
1422 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1423 /// token must be an Identifier when called, and if it is a coprocessor
1424 /// number, the token is eaten and the operand is added to the operand list.
1425 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1426 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1427 SMLoc S = Parser.getTok().getLoc();
1428 const AsmToken &Tok = Parser.getTok();
1429 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1431 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1433 return MatchOperand_NoMatch;
1435 Parser.Lex(); // Eat identifier token.
1436 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1437 return MatchOperand_Success;
1440 /// Parse a register list, return it if successful else return null. The first
1441 /// token must be a '{' when called.
1443 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1444 assert(Parser.getTok().is(AsmToken::LCurly) &&
1445 "Token is not a Left Curly Brace");
1446 SMLoc S = Parser.getTok().getLoc();
1448 // Read the rest of the registers in the list.
1449 unsigned PrevRegNum = 0;
1450 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1453 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1454 Parser.Lex(); // Eat non-identifier token.
1456 const AsmToken &RegTok = Parser.getTok();
1457 SMLoc RegLoc = RegTok.getLoc();
1458 if (RegTok.isNot(AsmToken::Identifier)) {
1459 Error(RegLoc, "register expected");
1463 int RegNum = tryParseRegister();
1465 Error(RegLoc, "register expected");
1470 int Reg = PrevRegNum;
1473 Registers.push_back(std::make_pair(Reg, RegLoc));
1474 } while (Reg != RegNum);
1476 Registers.push_back(std::make_pair(RegNum, RegLoc));
1479 PrevRegNum = RegNum;
1480 } while (Parser.getTok().is(AsmToken::Comma) ||
1481 Parser.getTok().is(AsmToken::Minus));
1483 // Process the right curly brace of the list.
1484 const AsmToken &RCurlyTok = Parser.getTok();
1485 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1486 Error(RCurlyTok.getLoc(), "'}' expected");
1490 SMLoc E = RCurlyTok.getLoc();
1491 Parser.Lex(); // Eat right curly brace token.
1493 // Verify the register list.
1494 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1495 RI = Registers.begin(), RE = Registers.end();
1497 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1498 bool EmittedWarning = false;
1500 DenseMap<unsigned, bool> RegMap;
1501 RegMap[HighRegNum] = true;
1503 for (++RI; RI != RE; ++RI) {
1504 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1505 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1508 Error(RegInfo.second, "register duplicated in register list");
1512 if (!EmittedWarning && Reg < HighRegNum)
1513 Warning(RegInfo.second,
1514 "register not in ascending order in register list");
1517 HighRegNum = std::max(Reg, HighRegNum);
1520 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1524 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1525 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1526 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1527 SMLoc S = Parser.getTok().getLoc();
1528 const AsmToken &Tok = Parser.getTok();
1529 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1530 StringRef OptStr = Tok.getString();
1532 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1533 .Case("sy", ARM_MB::SY)
1534 .Case("st", ARM_MB::ST)
1535 .Case("sh", ARM_MB::ISH)
1536 .Case("ish", ARM_MB::ISH)
1537 .Case("shst", ARM_MB::ISHST)
1538 .Case("ishst", ARM_MB::ISHST)
1539 .Case("nsh", ARM_MB::NSH)
1540 .Case("un", ARM_MB::NSH)
1541 .Case("nshst", ARM_MB::NSHST)
1542 .Case("unst", ARM_MB::NSHST)
1543 .Case("osh", ARM_MB::OSH)
1544 .Case("oshst", ARM_MB::OSHST)
1548 return MatchOperand_NoMatch;
1550 Parser.Lex(); // Eat identifier token.
1551 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1552 return MatchOperand_Success;
1555 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1556 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1557 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1558 SMLoc S = Parser.getTok().getLoc();
1559 const AsmToken &Tok = Parser.getTok();
1560 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1561 StringRef IFlagsStr = Tok.getString();
1563 unsigned IFlags = 0;
1564 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1565 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1566 .Case("a", ARM_PROC::A)
1567 .Case("i", ARM_PROC::I)
1568 .Case("f", ARM_PROC::F)
1571 // If some specific iflag is already set, it means that some letter is
1572 // present more than once, this is not acceptable.
1573 if (Flag == ~0U || (IFlags & Flag))
1574 return MatchOperand_NoMatch;
1579 Parser.Lex(); // Eat identifier token.
1580 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1581 return MatchOperand_Success;
1584 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1585 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1586 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1587 SMLoc S = Parser.getTok().getLoc();
1588 const AsmToken &Tok = Parser.getTok();
1589 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1590 StringRef Mask = Tok.getString();
1592 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1593 size_t Start = 0, Next = Mask.find('_');
1594 StringRef Flags = "";
1595 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1596 if (Next != StringRef::npos)
1597 Flags = Mask.slice(Next+1, Mask.size());
1599 // FlagsVal contains the complete mask:
1601 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1602 unsigned FlagsVal = 0;
1604 if (SpecReg == "apsr") {
1605 FlagsVal = StringSwitch<unsigned>(Flags)
1606 .Case("nzcvq", 0x8) // same as CPSR_f
1607 .Case("g", 0x4) // same as CPSR_s
1608 .Case("nzcvqg", 0xc) // same as CPSR_fs
1611 if (FlagsVal == ~0U) {
1613 return MatchOperand_NoMatch;
1615 FlagsVal = 0; // No flag
1617 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1618 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1620 for (int i = 0, e = Flags.size(); i != e; ++i) {
1621 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1628 // If some specific flag is already set, it means that some letter is
1629 // present more than once, this is not acceptable.
1630 if (FlagsVal == ~0U || (FlagsVal & Flag))
1631 return MatchOperand_NoMatch;
1634 } else // No match for special register.
1635 return MatchOperand_NoMatch;
1637 // Special register without flags are equivalent to "fc" flags.
1641 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1642 if (SpecReg == "spsr")
1645 Parser.Lex(); // Eat identifier token.
1646 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1647 return MatchOperand_Success;
1650 /// parseMemMode2Operand - Try to parse memory addressing mode 2 operand.
1651 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1652 parseMemMode2Operand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1653 assert(Parser.getTok().is(AsmToken::LBrac) && "Token is not a \"[\"");
1655 if (parseMemory(Operands, ARMII::AddrMode2))
1656 return MatchOperand_NoMatch;
1658 return MatchOperand_Success;
1661 /// parseMemMode3Operand - Try to parse memory addressing mode 3 operand.
1662 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1663 parseMemMode3Operand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1664 assert(Parser.getTok().is(AsmToken::LBrac) && "Token is not a \"[\"");
1666 if (parseMemory(Operands, ARMII::AddrMode3))
1667 return MatchOperand_NoMatch;
1669 return MatchOperand_Success;
1672 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1673 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1674 int Low, int High) {
1675 const AsmToken &Tok = Parser.getTok();
1676 if (Tok.isNot(AsmToken::Identifier)) {
1677 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1678 return MatchOperand_ParseFail;
1680 StringRef ShiftName = Tok.getString();
1681 std::string LowerOp = LowercaseString(Op);
1682 std::string UpperOp = UppercaseString(Op);
1683 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1684 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1685 return MatchOperand_ParseFail;
1687 Parser.Lex(); // Eat shift type token.
1689 // There must be a '#' and a shift amount.
1690 if (Parser.getTok().isNot(AsmToken::Hash)) {
1691 Error(Parser.getTok().getLoc(), "'#' expected");
1692 return MatchOperand_ParseFail;
1694 Parser.Lex(); // Eat hash token.
1696 const MCExpr *ShiftAmount;
1697 SMLoc Loc = Parser.getTok().getLoc();
1698 if (getParser().ParseExpression(ShiftAmount)) {
1699 Error(Loc, "illegal expression");
1700 return MatchOperand_ParseFail;
1702 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1704 Error(Loc, "constant expression expected");
1705 return MatchOperand_ParseFail;
1707 int Val = CE->getValue();
1708 if (Val < Low || Val > High) {
1709 Error(Loc, "immediate value out of range");
1710 return MatchOperand_ParseFail;
1713 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1715 return MatchOperand_Success;
1718 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1719 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1720 const AsmToken &Tok = Parser.getTok();
1721 SMLoc S = Tok.getLoc();
1722 if (Tok.isNot(AsmToken::Identifier)) {
1723 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1724 return MatchOperand_ParseFail;
1726 int Val = StringSwitch<int>(Tok.getString())
1730 Parser.Lex(); // Eat the token.
1733 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1734 return MatchOperand_ParseFail;
1736 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1738 S, Parser.getTok().getLoc()));
1739 return MatchOperand_Success;
1742 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1743 /// instructions. Legal values are:
1744 /// lsl #n 'n' in [0,31]
1745 /// asr #n 'n' in [1,32]
1746 /// n == 32 encoded as n == 0.
1747 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1748 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1749 const AsmToken &Tok = Parser.getTok();
1750 SMLoc S = Tok.getLoc();
1751 if (Tok.isNot(AsmToken::Identifier)) {
1752 Error(S, "shift operator 'asr' or 'lsl' expected");
1753 return MatchOperand_ParseFail;
1755 StringRef ShiftName = Tok.getString();
1757 if (ShiftName == "lsl" || ShiftName == "LSL")
1759 else if (ShiftName == "asr" || ShiftName == "ASR")
1762 Error(S, "shift operator 'asr' or 'lsl' expected");
1763 return MatchOperand_ParseFail;
1765 Parser.Lex(); // Eat the operator.
1767 // A '#' and a shift amount.
1768 if (Parser.getTok().isNot(AsmToken::Hash)) {
1769 Error(Parser.getTok().getLoc(), "'#' expected");
1770 return MatchOperand_ParseFail;
1772 Parser.Lex(); // Eat hash token.
1774 const MCExpr *ShiftAmount;
1775 SMLoc E = Parser.getTok().getLoc();
1776 if (getParser().ParseExpression(ShiftAmount)) {
1777 Error(E, "malformed shift expression");
1778 return MatchOperand_ParseFail;
1780 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1782 Error(E, "shift amount must be an immediate");
1783 return MatchOperand_ParseFail;
1786 int64_t Val = CE->getValue();
1788 // Shift amount must be in [1,32]
1789 if (Val < 1 || Val > 32) {
1790 Error(E, "'asr' shift amount must be in range [1,32]");
1791 return MatchOperand_ParseFail;
1793 // asr #32 encoded as asr #0.
1794 if (Val == 32) Val = 0;
1796 // Shift amount must be in [1,32]
1797 if (Val < 0 || Val > 31) {
1798 Error(E, "'lsr' shift amount must be in range [0,31]");
1799 return MatchOperand_ParseFail;
1803 E = Parser.getTok().getLoc();
1804 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1806 return MatchOperand_Success;
1809 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1810 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1811 /// when they refer multiple MIOperands inside a single one.
1813 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1814 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1815 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1817 // Create a writeback register dummy placeholder.
1818 Inst.addOperand(MCOperand::CreateImm(0));
1820 ((ARMOperand*)Operands[3])->addMemMode2Operands(Inst, 3);
1821 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1825 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
1826 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1827 /// when they refer multiple MIOperands inside a single one.
1829 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
1830 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1831 // Create a writeback register dummy placeholder.
1832 Inst.addOperand(MCOperand::CreateImm(0));
1833 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1834 ((ARMOperand*)Operands[3])->addMemMode2Operands(Inst, 3);
1835 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1839 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
1840 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1841 /// when they refer multiple MIOperands inside a single one.
1843 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
1844 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1845 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1847 // Create a writeback register dummy placeholder.
1848 Inst.addOperand(MCOperand::CreateImm(0));
1850 ((ARMOperand*)Operands[3])->addMemMode3Operands(Inst, 3);
1851 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1855 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
1856 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
1857 /// when they refer multiple MIOperands inside a single one.
1859 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
1860 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1861 // Create a writeback register dummy placeholder.
1862 Inst.addOperand(MCOperand::CreateImm(0));
1863 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
1864 ((ARMOperand*)Operands[3])->addMemMode3Operands(Inst, 3);
1865 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
1869 /// Parse an ARM memory expression, return false if successful else return true
1870 /// or an error. The first token must be a '[' when called.
1872 /// TODO Only preindexing and postindexing addressing are started, unindexed
1873 /// with option, etc are still to do.
1875 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
1876 ARMII::AddrMode AddrMode = ARMII::AddrModeNone) {
1878 assert(Parser.getTok().is(AsmToken::LBrac) &&
1879 "Token is not a Left Bracket");
1880 S = Parser.getTok().getLoc();
1881 Parser.Lex(); // Eat left bracket token.
1883 const AsmToken &BaseRegTok = Parser.getTok();
1884 if (BaseRegTok.isNot(AsmToken::Identifier)) {
1885 Error(BaseRegTok.getLoc(), "register expected");
1888 int BaseRegNum = tryParseRegister();
1889 if (BaseRegNum == -1) {
1890 Error(BaseRegTok.getLoc(), "register expected");
1894 // The next token must either be a comma or a closing bracket.
1895 const AsmToken &Tok = Parser.getTok();
1896 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
1899 bool Preindexed = false;
1900 bool Postindexed = false;
1901 bool OffsetIsReg = false;
1902 bool Negative = false;
1903 bool Writeback = false;
1904 ARMOperand *WBOp = 0;
1905 int OffsetRegNum = -1;
1906 bool OffsetRegShifted = false;
1907 enum ARM_AM::ShiftOpc ShiftType = ARM_AM::lsl;
1908 const MCExpr *ShiftAmount = 0;
1909 const MCExpr *Offset = 0;
1911 // First look for preindexed address forms, that is after the "[Rn" we now
1912 // have to see if the next token is a comma.
1913 if (Tok.is(AsmToken::Comma)) {
1915 Parser.Lex(); // Eat comma token.
1917 if (parseMemoryOffsetReg(Negative, OffsetRegShifted, ShiftType, ShiftAmount,
1918 Offset, OffsetIsReg, OffsetRegNum, E))
1920 const AsmToken &RBracTok = Parser.getTok();
1921 if (RBracTok.isNot(AsmToken::RBrac)) {
1922 Error(RBracTok.getLoc(), "']' expected");
1925 E = RBracTok.getLoc();
1926 Parser.Lex(); // Eat right bracket token.
1928 const AsmToken &ExclaimTok = Parser.getTok();
1929 if (ExclaimTok.is(AsmToken::Exclaim)) {
1930 // None of addrmode3 instruction uses "!"
1931 if (AddrMode == ARMII::AddrMode3)
1934 WBOp = ARMOperand::CreateToken(ExclaimTok.getString(),
1935 ExclaimTok.getLoc());
1937 Parser.Lex(); // Eat exclaim token
1938 } else { // In addressing mode 2, pre-indexed mode always end with "!"
1939 if (AddrMode == ARMII::AddrMode2)
1943 // The "[Rn" we have so far was not followed by a comma.
1945 // If there's anything other than the right brace, this is a post indexing
1948 Parser.Lex(); // Eat right bracket token.
1950 const AsmToken &NextTok = Parser.getTok();
1952 if (NextTok.isNot(AsmToken::EndOfStatement)) {
1956 if (NextTok.isNot(AsmToken::Comma)) {
1957 Error(NextTok.getLoc(), "',' expected");
1961 Parser.Lex(); // Eat comma token.
1963 if (parseMemoryOffsetReg(Negative, OffsetRegShifted, ShiftType,
1964 ShiftAmount, Offset, OffsetIsReg, OffsetRegNum,
1970 // Force Offset to exist if used.
1973 Offset = MCConstantExpr::Create(0, getContext());
1975 if (AddrMode == ARMII::AddrMode3 && OffsetRegShifted) {
1976 Error(E, "shift amount not supported");
1981 Operands.push_back(ARMOperand::CreateMem(AddrMode, BaseRegNum, OffsetIsReg,
1982 Offset, OffsetRegNum, OffsetRegShifted,
1983 ShiftType, ShiftAmount, Preindexed,
1984 Postindexed, Negative, Writeback, S, E));
1986 Operands.push_back(WBOp);
1991 /// Parse the offset of a memory operand after we have seen "[Rn," or "[Rn],"
1992 /// we will parse the following (were +/- means that a plus or minus is
1997 /// we return false on success or an error otherwise.
1998 bool ARMAsmParser::parseMemoryOffsetReg(bool &Negative,
1999 bool &OffsetRegShifted,
2000 enum ARM_AM::ShiftOpc &ShiftType,
2001 const MCExpr *&ShiftAmount,
2002 const MCExpr *&Offset,
2007 OffsetRegShifted = false;
2008 OffsetIsReg = false;
2010 const AsmToken &NextTok = Parser.getTok();
2011 E = NextTok.getLoc();
2012 if (NextTok.is(AsmToken::Plus))
2013 Parser.Lex(); // Eat plus token.
2014 else if (NextTok.is(AsmToken::Minus)) {
2016 Parser.Lex(); // Eat minus token
2018 // See if there is a register following the "[Rn," or "[Rn]," we have so far.
2019 const AsmToken &OffsetRegTok = Parser.getTok();
2020 if (OffsetRegTok.is(AsmToken::Identifier)) {
2021 SMLoc CurLoc = OffsetRegTok.getLoc();
2022 OffsetRegNum = tryParseRegister();
2023 if (OffsetRegNum != -1) {
2029 // If we parsed a register as the offset then there can be a shift after that.
2030 if (OffsetRegNum != -1) {
2031 // Look for a comma then a shift
2032 const AsmToken &Tok = Parser.getTok();
2033 if (Tok.is(AsmToken::Comma)) {
2034 Parser.Lex(); // Eat comma token.
2036 const AsmToken &Tok = Parser.getTok();
2037 if (parseShift(ShiftType, ShiftAmount, E))
2038 return Error(Tok.getLoc(), "shift expected");
2039 OffsetRegShifted = true;
2042 else { // the "[Rn," or "[Rn,]" we have so far was not followed by "Rm"
2043 // Look for #offset following the "[Rn," or "[Rn],"
2044 const AsmToken &HashTok = Parser.getTok();
2045 if (HashTok.isNot(AsmToken::Hash))
2046 return Error(HashTok.getLoc(), "'#' expected");
2048 Parser.Lex(); // Eat hash token.
2050 if (getParser().ParseExpression(Offset))
2052 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2057 /// parseShift as one of these two:
2058 /// ( lsl | lsr | asr | ror ) , # shift_amount
2060 /// and returns true if it parses a shift otherwise it returns false.
2061 bool ARMAsmParser::parseShift(ARM_AM::ShiftOpc &St,
2062 const MCExpr *&ShiftAmount, SMLoc &E) {
2063 const AsmToken &Tok = Parser.getTok();
2064 if (Tok.isNot(AsmToken::Identifier))
2066 StringRef ShiftName = Tok.getString();
2067 if (ShiftName == "lsl" || ShiftName == "LSL")
2069 else if (ShiftName == "lsr" || ShiftName == "LSR")
2071 else if (ShiftName == "asr" || ShiftName == "ASR")
2073 else if (ShiftName == "ror" || ShiftName == "ROR")
2075 else if (ShiftName == "rrx" || ShiftName == "RRX")
2079 Parser.Lex(); // Eat shift type token.
2081 // Rrx stands alone.
2082 if (St == ARM_AM::rrx)
2085 // Otherwise, there must be a '#' and a shift amount.
2086 const AsmToken &HashTok = Parser.getTok();
2087 if (HashTok.isNot(AsmToken::Hash))
2088 return Error(HashTok.getLoc(), "'#' expected");
2089 Parser.Lex(); // Eat hash token.
2091 if (getParser().ParseExpression(ShiftAmount))
2097 /// Parse a arm instruction operand. For now this parses the operand regardless
2098 /// of the mnemonic.
2099 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2100 StringRef Mnemonic) {
2103 // Check if the current operand has a custom associated parser, if so, try to
2104 // custom parse the operand, or fallback to the general approach.
2105 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2106 if (ResTy == MatchOperand_Success)
2108 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2109 // there was a match, but an error occurred, in which case, just return that
2110 // the operand parsing failed.
2111 if (ResTy == MatchOperand_ParseFail)
2114 switch (getLexer().getKind()) {
2116 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2118 case AsmToken::Identifier: {
2119 if (!tryParseRegisterWithWriteBack(Operands))
2121 int Res = tryparseShiftRegister(Operands);
2122 if (Res == 0) // success
2124 else if (Res == -1) // irrecoverable error
2127 // Fall though for the Identifier case that is not a register or a
2130 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2131 case AsmToken::Dot: { // . as a branch target
2132 // This was not a register so parse other operands that start with an
2133 // identifier (like labels) as expressions and create them as immediates.
2134 const MCExpr *IdVal;
2135 S = Parser.getTok().getLoc();
2136 if (getParser().ParseExpression(IdVal))
2138 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2139 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2142 case AsmToken::LBrac:
2143 return parseMemory(Operands);
2144 case AsmToken::LCurly:
2145 return parseRegisterList(Operands);
2146 case AsmToken::Hash:
2147 // #42 -> immediate.
2148 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2149 S = Parser.getTok().getLoc();
2151 const MCExpr *ImmVal;
2152 if (getParser().ParseExpression(ImmVal))
2154 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2155 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2157 case AsmToken::Colon: {
2158 // ":lower16:" and ":upper16:" expression prefixes
2159 // FIXME: Check it's an expression prefix,
2160 // e.g. (FOO - :lower16:BAR) isn't legal.
2161 ARMMCExpr::VariantKind RefKind;
2162 if (parsePrefix(RefKind))
2165 const MCExpr *SubExprVal;
2166 if (getParser().ParseExpression(SubExprVal))
2169 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2171 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2172 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2178 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2179 // :lower16: and :upper16:.
2180 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2181 RefKind = ARMMCExpr::VK_ARM_None;
2183 // :lower16: and :upper16: modifiers
2184 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2185 Parser.Lex(); // Eat ':'
2187 if (getLexer().isNot(AsmToken::Identifier)) {
2188 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2192 StringRef IDVal = Parser.getTok().getIdentifier();
2193 if (IDVal == "lower16") {
2194 RefKind = ARMMCExpr::VK_ARM_LO16;
2195 } else if (IDVal == "upper16") {
2196 RefKind = ARMMCExpr::VK_ARM_HI16;
2198 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2203 if (getLexer().isNot(AsmToken::Colon)) {
2204 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2207 Parser.Lex(); // Eat the last ':'
2212 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2213 MCSymbolRefExpr::VariantKind Variant) {
2214 // Recurse over the given expression, rebuilding it to apply the given variant
2215 // to the leftmost symbol.
2216 if (Variant == MCSymbolRefExpr::VK_None)
2219 switch (E->getKind()) {
2220 case MCExpr::Target:
2221 llvm_unreachable("Can't handle target expr yet");
2222 case MCExpr::Constant:
2223 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2225 case MCExpr::SymbolRef: {
2226 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2228 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2231 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2235 llvm_unreachable("Can't handle unary expressions yet");
2237 case MCExpr::Binary: {
2238 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2239 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2240 const MCExpr *RHS = BE->getRHS();
2244 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2248 assert(0 && "Invalid expression kind!");
2252 /// \brief Given a mnemonic, split out possible predication code and carry
2253 /// setting letters to form a canonical mnemonic and flags.
2255 // FIXME: Would be nice to autogen this.
2256 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2257 unsigned &PredicationCode,
2259 unsigned &ProcessorIMod) {
2260 PredicationCode = ARMCC::AL;
2261 CarrySetting = false;
2264 // Ignore some mnemonics we know aren't predicated forms.
2266 // FIXME: Would be nice to autogen this.
2267 if ((Mnemonic == "movs" && isThumb()) ||
2268 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2269 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2270 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2271 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2272 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2273 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2274 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2277 // First, split out any predication code. Ignore mnemonics we know aren't
2278 // predicated but do have a carry-set and so weren't caught above.
2279 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2280 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls") {
2281 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2282 .Case("eq", ARMCC::EQ)
2283 .Case("ne", ARMCC::NE)
2284 .Case("hs", ARMCC::HS)
2285 .Case("cs", ARMCC::HS)
2286 .Case("lo", ARMCC::LO)
2287 .Case("cc", ARMCC::LO)
2288 .Case("mi", ARMCC::MI)
2289 .Case("pl", ARMCC::PL)
2290 .Case("vs", ARMCC::VS)
2291 .Case("vc", ARMCC::VC)
2292 .Case("hi", ARMCC::HI)
2293 .Case("ls", ARMCC::LS)
2294 .Case("ge", ARMCC::GE)
2295 .Case("lt", ARMCC::LT)
2296 .Case("gt", ARMCC::GT)
2297 .Case("le", ARMCC::LE)
2298 .Case("al", ARMCC::AL)
2301 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2302 PredicationCode = CC;
2306 // Next, determine if we have a carry setting bit. We explicitly ignore all
2307 // the instructions we know end in 's'.
2308 if (Mnemonic.endswith("s") &&
2309 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
2310 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2311 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2312 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2313 Mnemonic == "vrsqrts" || (Mnemonic == "movs" && isThumb()))) {
2314 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2315 CarrySetting = true;
2318 // The "cps" instruction can have a interrupt mode operand which is glued into
2319 // the mnemonic. Check if this is the case, split it and parse the imod op
2320 if (Mnemonic.startswith("cps")) {
2321 // Split out any imod code.
2323 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2324 .Case("ie", ARM_PROC::IE)
2325 .Case("id", ARM_PROC::ID)
2328 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2329 ProcessorIMod = IMod;
2336 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2337 /// inclusion of carry set or predication code operands.
2339 // FIXME: It would be nice to autogen this.
2341 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2342 bool &CanAcceptPredicationCode) {
2343 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2344 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2345 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2346 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2347 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2348 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2349 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2350 Mnemonic == "eor" || Mnemonic == "smlal" ||
2351 (Mnemonic == "mov" && !isThumbOne())) {
2352 CanAcceptCarrySet = true;
2354 CanAcceptCarrySet = false;
2357 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2358 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2359 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2360 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2361 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2362 Mnemonic == "setend" ||
2363 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2364 CanAcceptPredicationCode = false;
2366 CanAcceptPredicationCode = true;
2370 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2371 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2372 CanAcceptPredicationCode = false;
2375 /// Parse an arm instruction mnemonic followed by its operands.
2376 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2377 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2378 // Create the leading tokens for the mnemonic, split by '.' characters.
2379 size_t Start = 0, Next = Name.find('.');
2380 StringRef Mnemonic = Name.slice(Start, Next);
2382 // Split out the predication code and carry setting flag from the mnemonic.
2383 unsigned PredicationCode;
2384 unsigned ProcessorIMod;
2386 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2389 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2391 // FIXME: This is all a pretty gross hack. We should automatically handle
2392 // optional operands like this via tblgen.
2394 // Next, add the CCOut and ConditionCode operands, if needed.
2396 // For mnemonics which can ever incorporate a carry setting bit or predication
2397 // code, our matching model involves us always generating CCOut and
2398 // ConditionCode operands to match the mnemonic "as written" and then we let
2399 // the matcher deal with finding the right instruction or generating an
2400 // appropriate error.
2401 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2402 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2404 // If we had a carry-set on an instruction that can't do that, issue an
2406 if (!CanAcceptCarrySet && CarrySetting) {
2407 Parser.EatToEndOfStatement();
2408 return Error(NameLoc, "instruction '" + Mnemonic +
2409 "' can not set flags, but 's' suffix specified");
2411 // If we had a predication code on an instruction that can't do that, issue an
2413 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2414 Parser.EatToEndOfStatement();
2415 return Error(NameLoc, "instruction '" + Mnemonic +
2416 "' is not predicable, but condition code specified");
2419 // Add the carry setting operand, if necessary.
2421 // FIXME: It would be awesome if we could somehow invent a location such that
2422 // match errors on this operand would print a nice diagnostic about how the
2423 // 's' character in the mnemonic resulted in a CCOut operand.
2424 if (CanAcceptCarrySet)
2425 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2428 // Add the predication code operand, if necessary.
2429 if (CanAcceptPredicationCode) {
2430 Operands.push_back(ARMOperand::CreateCondCode(
2431 ARMCC::CondCodes(PredicationCode), NameLoc));
2434 // Add the processor imod operand, if necessary.
2435 if (ProcessorIMod) {
2436 Operands.push_back(ARMOperand::CreateImm(
2437 MCConstantExpr::Create(ProcessorIMod, getContext()),
2440 // This mnemonic can't ever accept a imod, but the user wrote
2441 // one (or misspelled another mnemonic).
2443 // FIXME: Issue a nice error.
2446 // Add the remaining tokens in the mnemonic.
2447 while (Next != StringRef::npos) {
2449 Next = Name.find('.', Start + 1);
2450 StringRef ExtraToken = Name.slice(Start, Next);
2452 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2455 // Read the remaining operands.
2456 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2457 // Read the first operand.
2458 if (parseOperand(Operands, Mnemonic)) {
2459 Parser.EatToEndOfStatement();
2463 while (getLexer().is(AsmToken::Comma)) {
2464 Parser.Lex(); // Eat the comma.
2466 // Parse and remember the operand.
2467 if (parseOperand(Operands, Mnemonic)) {
2468 Parser.EatToEndOfStatement();
2474 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2475 Parser.EatToEndOfStatement();
2476 return TokError("unexpected token in argument list");
2479 Parser.Lex(); // Consume the EndOfStatement
2482 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2483 // another does not. Specifically, the MOVW instruction does not. So we
2484 // special case it here and remove the defaulted (non-setting) cc_out
2485 // operand if that's the instruction we're trying to match.
2487 // We do this post-processing of the explicit operands rather than just
2488 // conditionally adding the cc_out in the first place because we need
2489 // to check the type of the parsed immediate operand.
2490 if (Mnemonic == "mov" && Operands.size() > 4 &&
2491 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2492 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2493 static_cast<ARMOperand*>(Operands[1])->getReg() == 0) {
2494 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2495 Operands.erase(Operands.begin() + 1);
2503 MatchAndEmitInstruction(SMLoc IDLoc,
2504 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2508 MatchResultTy MatchResult;
2509 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2510 switch (MatchResult) {
2512 Out.EmitInstruction(Inst);
2514 case Match_MissingFeature:
2515 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2517 case Match_InvalidOperand: {
2518 SMLoc ErrorLoc = IDLoc;
2519 if (ErrorInfo != ~0U) {
2520 if (ErrorInfo >= Operands.size())
2521 return Error(IDLoc, "too few operands for instruction");
2523 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2524 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2527 return Error(ErrorLoc, "invalid operand for instruction");
2529 case Match_MnemonicFail:
2530 return Error(IDLoc, "unrecognized instruction mnemonic");
2531 case Match_ConversionFail:
2532 return Error(IDLoc, "unable to convert operands to instruction");
2535 llvm_unreachable("Implement any new match types added!");
2539 /// parseDirective parses the arm specific directives
2540 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2541 StringRef IDVal = DirectiveID.getIdentifier();
2542 if (IDVal == ".word")
2543 return parseDirectiveWord(4, DirectiveID.getLoc());
2544 else if (IDVal == ".thumb")
2545 return parseDirectiveThumb(DirectiveID.getLoc());
2546 else if (IDVal == ".thumb_func")
2547 return parseDirectiveThumbFunc(DirectiveID.getLoc());
2548 else if (IDVal == ".code")
2549 return parseDirectiveCode(DirectiveID.getLoc());
2550 else if (IDVal == ".syntax")
2551 return parseDirectiveSyntax(DirectiveID.getLoc());
2555 /// parseDirectiveWord
2556 /// ::= .word [ expression (, expression)* ]
2557 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
2558 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2560 const MCExpr *Value;
2561 if (getParser().ParseExpression(Value))
2564 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2566 if (getLexer().is(AsmToken::EndOfStatement))
2569 // FIXME: Improve diagnostic.
2570 if (getLexer().isNot(AsmToken::Comma))
2571 return Error(L, "unexpected token in directive");
2580 /// parseDirectiveThumb
2582 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
2583 if (getLexer().isNot(AsmToken::EndOfStatement))
2584 return Error(L, "unexpected token in directive");
2587 // TODO: set thumb mode
2588 // TODO: tell the MC streamer the mode
2589 // getParser().getStreamer().Emit???();
2593 /// parseDirectiveThumbFunc
2594 /// ::= .thumbfunc symbol_name
2595 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
2596 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
2597 bool isMachO = MAI.hasSubsectionsViaSymbols();
2600 // Darwin asm has function name after .thumb_func direction
2603 const AsmToken &Tok = Parser.getTok();
2604 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
2605 return Error(L, "unexpected token in .thumb_func directive");
2606 Name = Tok.getString();
2607 Parser.Lex(); // Consume the identifier token.
2610 if (getLexer().isNot(AsmToken::EndOfStatement))
2611 return Error(L, "unexpected token in directive");
2614 // FIXME: assuming function name will be the line following .thumb_func
2616 Name = Parser.getTok().getString();
2619 // Mark symbol as a thumb symbol.
2620 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
2621 getParser().getStreamer().EmitThumbFunc(Func);
2625 /// parseDirectiveSyntax
2626 /// ::= .syntax unified | divided
2627 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
2628 const AsmToken &Tok = Parser.getTok();
2629 if (Tok.isNot(AsmToken::Identifier))
2630 return Error(L, "unexpected token in .syntax directive");
2631 StringRef Mode = Tok.getString();
2632 if (Mode == "unified" || Mode == "UNIFIED")
2634 else if (Mode == "divided" || Mode == "DIVIDED")
2635 return Error(L, "'.syntax divided' arm asssembly not supported");
2637 return Error(L, "unrecognized syntax mode in .syntax directive");
2639 if (getLexer().isNot(AsmToken::EndOfStatement))
2640 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2643 // TODO tell the MC streamer the mode
2644 // getParser().getStreamer().Emit???();
2648 /// parseDirectiveCode
2649 /// ::= .code 16 | 32
2650 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
2651 const AsmToken &Tok = Parser.getTok();
2652 if (Tok.isNot(AsmToken::Integer))
2653 return Error(L, "unexpected token in .code directive");
2654 int64_t Val = Parser.getTok().getIntVal();
2660 return Error(L, "invalid operand to .code directive");
2662 if (getLexer().isNot(AsmToken::EndOfStatement))
2663 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2669 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
2673 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
2679 extern "C" void LLVMInitializeARMAsmLexer();
2681 /// Force static initialization.
2682 extern "C" void LLVMInitializeARMAsmParser() {
2683 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
2684 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
2685 LLVMInitializeARMAsmLexer();
2688 #define GET_REGISTER_MATCHER
2689 #define GET_MATCHER_IMPLEMENTATION
2690 #include "ARMGenAsmMatcher.inc"