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 <= 124 && (Val % 4) == 0;
631 bool isMemThumbRIs1() const {
632 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
633 !isARMLowRegister(Mem.BaseRegNum))
635 // Immediate offset in range [0, 31].
636 if (!Mem.OffsetImm) return true;
637 int64_t Val = Mem.OffsetImm->getValue();
638 return Val >= 0 && Val <= 31;
640 bool isMemThumbSPI() const {
641 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
643 // Immediate offset, multiple of 4 in range [0, 1020].
644 if (!Mem.OffsetImm) return true;
645 int64_t Val = Mem.OffsetImm->getValue();
646 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
648 bool isMemImm8Offset() const {
649 if (Kind != Memory || Mem.OffsetRegNum != 0)
651 // Immediate offset in range [-255, 255].
652 if (!Mem.OffsetImm) return true;
653 int64_t Val = Mem.OffsetImm->getValue();
654 return Val > -256 && Val < 256;
656 bool isMemImm12Offset() const {
657 // If we have an immediate that's not a constant, treat it as a label
658 // reference needing a fixup. If it is a constant, it's something else
660 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
663 if (Kind != Memory || Mem.OffsetRegNum != 0)
665 // Immediate offset in range [-4095, 4095].
666 if (!Mem.OffsetImm) return true;
667 int64_t Val = Mem.OffsetImm->getValue();
668 return Val > -4096 && Val < 4096;
670 bool isPostIdxImm8() const {
671 if (Kind != Immediate)
673 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
674 if (!CE) return false;
675 int64_t Val = CE->getValue();
676 return Val > -256 && Val < 256;
679 bool isMSRMask() const { return Kind == MSRMask; }
680 bool isProcIFlags() const { return Kind == ProcIFlags; }
682 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
683 // Add as immediates when possible. Null MCExpr = 0.
685 Inst.addOperand(MCOperand::CreateImm(0));
686 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
687 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
689 Inst.addOperand(MCOperand::CreateExpr(Expr));
692 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
693 assert(N == 2 && "Invalid number of operands!");
694 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
695 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
696 Inst.addOperand(MCOperand::CreateReg(RegNum));
699 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
700 assert(N == 1 && "Invalid number of operands!");
701 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
704 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
705 assert(N == 1 && "Invalid number of operands!");
706 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
709 void addCCOutOperands(MCInst &Inst, unsigned N) const {
710 assert(N == 1 && "Invalid number of operands!");
711 Inst.addOperand(MCOperand::CreateReg(getReg()));
714 void addRegOperands(MCInst &Inst, unsigned N) const {
715 assert(N == 1 && "Invalid number of operands!");
716 Inst.addOperand(MCOperand::CreateReg(getReg()));
719 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
720 assert(N == 3 && "Invalid number of operands!");
721 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
722 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
723 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
724 Inst.addOperand(MCOperand::CreateImm(
725 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
728 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
729 assert(N == 2 && "Invalid number of operands!");
730 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
731 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
732 Inst.addOperand(MCOperand::CreateImm(
733 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
737 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
738 assert(N == 1 && "Invalid number of operands!");
739 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
743 void addRegListOperands(MCInst &Inst, unsigned N) const {
744 assert(N == 1 && "Invalid number of operands!");
745 const SmallVectorImpl<unsigned> &RegList = getRegList();
746 for (SmallVectorImpl<unsigned>::const_iterator
747 I = RegList.begin(), E = RegList.end(); I != E; ++I)
748 Inst.addOperand(MCOperand::CreateReg(*I));
751 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
752 addRegListOperands(Inst, N);
755 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
756 addRegListOperands(Inst, N);
759 void addRotImmOperands(MCInst &Inst, unsigned N) const {
760 assert(N == 1 && "Invalid number of operands!");
761 // Encoded as val>>3. The printer handles display as 8, 16, 24.
762 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
765 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
766 assert(N == 1 && "Invalid number of operands!");
767 // Munge the lsb/width into a bitfield mask.
768 unsigned lsb = Bitfield.LSB;
769 unsigned width = Bitfield.Width;
770 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
771 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
772 (32 - (lsb + width)));
773 Inst.addOperand(MCOperand::CreateImm(Mask));
776 void addImmOperands(MCInst &Inst, unsigned N) const {
777 assert(N == 1 && "Invalid number of operands!");
778 addExpr(Inst, getImm());
781 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
782 assert(N == 1 && "Invalid number of operands!");
783 addExpr(Inst, getImm());
786 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
787 assert(N == 1 && "Invalid number of operands!");
788 addExpr(Inst, getImm());
791 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
792 assert(N == 1 && "Invalid number of operands!");
793 addExpr(Inst, getImm());
796 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
797 assert(N == 1 && "Invalid number of operands!");
798 addExpr(Inst, getImm());
801 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
802 assert(N == 1 && "Invalid number of operands!");
803 // The constant encodes as the immediate-1, and we store in the instruction
804 // the bits as encoded, so subtract off one here.
805 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
806 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
809 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
810 assert(N == 1 && "Invalid number of operands!");
811 // The constant encodes as the immediate-1, and we store in the instruction
812 // the bits as encoded, so subtract off one here.
813 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
814 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
817 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
818 assert(N == 1 && "Invalid number of operands!");
819 addExpr(Inst, getImm());
822 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
823 assert(N == 1 && "Invalid number of operands!");
824 addExpr(Inst, getImm());
827 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
828 assert(N == 1 && "Invalid number of operands!");
829 addExpr(Inst, getImm());
832 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
833 assert(N == 1 && "Invalid number of operands!");
834 // The constant encodes as the immediate, except for 32, which encodes as
836 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
837 unsigned Imm = CE->getValue();
838 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
841 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
842 assert(N == 1 && "Invalid number of operands!");
843 addExpr(Inst, getImm());
846 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
847 assert(N == 1 && "Invalid number of operands!");
848 // An ASR value of 32 encodes as 0, so that's how we want to add it to
849 // the instruction as well.
850 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
851 int Val = CE->getValue();
852 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
855 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
856 assert(N == 1 && "Invalid number of operands!");
857 addExpr(Inst, getImm());
860 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
861 assert(N == 1 && "Invalid number of operands!");
862 addExpr(Inst, getImm());
865 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
866 assert(N == 1 && "Invalid number of operands!");
867 addExpr(Inst, getImm());
870 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
871 assert(N == 1 && "Invalid number of operands!");
872 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
875 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
876 assert(N == 1 && "Invalid number of operands!");
877 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
880 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
881 assert(N == 3 && "Invalid number of operands!");
882 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
883 if (!Mem.OffsetRegNum) {
884 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
885 // Special case for #-0
886 if (Val == INT32_MIN) Val = 0;
887 if (Val < 0) Val = -Val;
888 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
890 // For register offset, we encode the shift type and negation flag
892 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
893 Mem.ShiftImm, Mem.ShiftType);
895 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
896 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
897 Inst.addOperand(MCOperand::CreateImm(Val));
900 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
901 assert(N == 2 && "Invalid number of operands!");
902 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
903 assert(CE && "non-constant AM2OffsetImm operand!");
904 int32_t Val = CE->getValue();
905 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
906 // Special case for #-0
907 if (Val == INT32_MIN) Val = 0;
908 if (Val < 0) Val = -Val;
909 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
910 Inst.addOperand(MCOperand::CreateReg(0));
911 Inst.addOperand(MCOperand::CreateImm(Val));
914 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
915 assert(N == 3 && "Invalid number of operands!");
916 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
917 if (!Mem.OffsetRegNum) {
918 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
919 // Special case for #-0
920 if (Val == INT32_MIN) Val = 0;
921 if (Val < 0) Val = -Val;
922 Val = ARM_AM::getAM3Opc(AddSub, Val);
924 // For register offset, we encode the shift type and negation flag
926 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
928 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
929 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
930 Inst.addOperand(MCOperand::CreateImm(Val));
933 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
934 assert(N == 2 && "Invalid number of operands!");
935 if (Kind == PostIndexRegister) {
937 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
938 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
939 Inst.addOperand(MCOperand::CreateImm(Val));
944 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
945 int32_t Val = CE->getValue();
946 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
947 // Special case for #-0
948 if (Val == INT32_MIN) Val = 0;
949 if (Val < 0) Val = -Val;
950 Val = ARM_AM::getAM3Opc(AddSub, Val);
951 Inst.addOperand(MCOperand::CreateReg(0));
952 Inst.addOperand(MCOperand::CreateImm(Val));
955 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
956 assert(N == 2 && "Invalid number of operands!");
957 // The lower two bits are always zero and as such are not encoded.
958 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
959 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
960 // Special case for #-0
961 if (Val == INT32_MIN) Val = 0;
962 if (Val < 0) Val = -Val;
963 Val = ARM_AM::getAM5Opc(AddSub, Val);
964 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
965 Inst.addOperand(MCOperand::CreateImm(Val));
968 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
969 assert(N == 2 && "Invalid number of operands!");
970 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
971 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
972 Inst.addOperand(MCOperand::CreateImm(Val));
975 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
976 assert(N == 2 && "Invalid number of operands!");
977 // If this is an immediate, it's a label reference.
978 if (Kind == Immediate) {
979 addExpr(Inst, getImm());
980 Inst.addOperand(MCOperand::CreateImm(0));
984 // Otherwise, it's a normal memory reg+offset.
985 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
986 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
987 Inst.addOperand(MCOperand::CreateImm(Val));
990 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
991 assert(N == 3 && "Invalid number of operands!");
992 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
993 Mem.ShiftImm, Mem.ShiftType);
994 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
995 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
996 Inst.addOperand(MCOperand::CreateImm(Val));
999 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1000 assert(N == 2 && "Invalid number of operands!");
1001 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1002 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1005 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1006 assert(N == 2 && "Invalid number of operands!");
1007 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1008 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1009 Inst.addOperand(MCOperand::CreateImm(Val));
1012 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1013 assert(N == 2 && "Invalid number of operands!");
1014 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue()) : 0;
1015 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1016 Inst.addOperand(MCOperand::CreateImm(Val));
1019 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1020 assert(N == 2 && "Invalid number of operands!");
1021 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1022 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1023 Inst.addOperand(MCOperand::CreateImm(Val));
1026 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1027 assert(N == 1 && "Invalid number of operands!");
1028 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1029 assert(CE && "non-constant post-idx-imm8 operand!");
1030 int Imm = CE->getValue();
1031 bool isAdd = Imm >= 0;
1032 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1033 Inst.addOperand(MCOperand::CreateImm(Imm));
1036 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1037 assert(N == 2 && "Invalid number of operands!");
1038 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1039 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1042 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1043 assert(N == 2 && "Invalid number of operands!");
1044 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1045 // The sign, shift type, and shift amount are encoded in a single operand
1046 // using the AM2 encoding helpers.
1047 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1048 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1049 PostIdxReg.ShiftTy);
1050 Inst.addOperand(MCOperand::CreateImm(Imm));
1053 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1054 assert(N == 1 && "Invalid number of operands!");
1055 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1058 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1059 assert(N == 1 && "Invalid number of operands!");
1060 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1063 virtual void print(raw_ostream &OS) const;
1065 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1066 ARMOperand *Op = new ARMOperand(CondCode);
1073 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1074 ARMOperand *Op = new ARMOperand(CoprocNum);
1075 Op->Cop.Val = CopVal;
1081 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1082 ARMOperand *Op = new ARMOperand(CoprocReg);
1083 Op->Cop.Val = CopVal;
1089 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1090 ARMOperand *Op = new ARMOperand(CCOut);
1091 Op->Reg.RegNum = RegNum;
1097 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1098 ARMOperand *Op = new ARMOperand(Token);
1099 Op->Tok.Data = Str.data();
1100 Op->Tok.Length = Str.size();
1106 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1107 ARMOperand *Op = new ARMOperand(Register);
1108 Op->Reg.RegNum = RegNum;
1114 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1119 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1120 Op->RegShiftedReg.ShiftTy = ShTy;
1121 Op->RegShiftedReg.SrcReg = SrcReg;
1122 Op->RegShiftedReg.ShiftReg = ShiftReg;
1123 Op->RegShiftedReg.ShiftImm = ShiftImm;
1129 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1133 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1134 Op->RegShiftedImm.ShiftTy = ShTy;
1135 Op->RegShiftedImm.SrcReg = SrcReg;
1136 Op->RegShiftedImm.ShiftImm = ShiftImm;
1142 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1144 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1145 Op->ShifterImm.isASR = isASR;
1146 Op->ShifterImm.Imm = Imm;
1152 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1153 ARMOperand *Op = new ARMOperand(RotateImmediate);
1154 Op->RotImm.Imm = Imm;
1160 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1162 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1163 Op->Bitfield.LSB = LSB;
1164 Op->Bitfield.Width = Width;
1171 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1172 SMLoc StartLoc, SMLoc EndLoc) {
1173 KindTy Kind = RegisterList;
1175 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1176 contains(Regs.front().first))
1177 Kind = DPRRegisterList;
1178 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1179 contains(Regs.front().first))
1180 Kind = SPRRegisterList;
1182 ARMOperand *Op = new ARMOperand(Kind);
1183 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1184 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1185 Op->Registers.push_back(I->first);
1186 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1187 Op->StartLoc = StartLoc;
1188 Op->EndLoc = EndLoc;
1192 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1193 ARMOperand *Op = new ARMOperand(Immediate);
1200 static ARMOperand *CreateMem(unsigned BaseRegNum,
1201 const MCConstantExpr *OffsetImm,
1202 unsigned OffsetRegNum,
1203 ARM_AM::ShiftOpc ShiftType,
1207 ARMOperand *Op = new ARMOperand(Memory);
1208 Op->Mem.BaseRegNum = BaseRegNum;
1209 Op->Mem.OffsetImm = OffsetImm;
1210 Op->Mem.OffsetRegNum = OffsetRegNum;
1211 Op->Mem.ShiftType = ShiftType;
1212 Op->Mem.ShiftImm = ShiftImm;
1213 Op->Mem.isNegative = isNegative;
1219 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1220 ARM_AM::ShiftOpc ShiftTy,
1223 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1224 Op->PostIdxReg.RegNum = RegNum;
1225 Op->PostIdxReg.isAdd = isAdd;
1226 Op->PostIdxReg.ShiftTy = ShiftTy;
1227 Op->PostIdxReg.ShiftImm = ShiftImm;
1233 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1234 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1235 Op->MBOpt.Val = Opt;
1241 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1242 ARMOperand *Op = new ARMOperand(ProcIFlags);
1243 Op->IFlags.Val = IFlags;
1249 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1250 ARMOperand *Op = new ARMOperand(MSRMask);
1251 Op->MMask.Val = MMask;
1258 } // end anonymous namespace.
1260 void ARMOperand::print(raw_ostream &OS) const {
1263 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1266 OS << "<ccout " << getReg() << ">";
1269 OS << "<coprocessor number: " << getCoproc() << ">";
1272 OS << "<coprocessor register: " << getCoproc() << ">";
1275 OS << "<mask: " << getMSRMask() << ">";
1278 getImm()->print(OS);
1281 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1285 << " base:" << Mem.BaseRegNum;
1288 case PostIndexRegister:
1289 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1290 << PostIdxReg.RegNum;
1291 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1292 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1293 << PostIdxReg.ShiftImm;
1297 OS << "<ARM_PROC::";
1298 unsigned IFlags = getProcIFlags();
1299 for (int i=2; i >= 0; --i)
1300 if (IFlags & (1 << i))
1301 OS << ARM_PROC::IFlagsToString(1 << i);
1306 OS << "<register " << getReg() << ">";
1308 case ShifterImmediate:
1309 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1310 << " #" << ShifterImm.Imm << ">";
1312 case ShiftedRegister:
1313 OS << "<so_reg_reg "
1314 << RegShiftedReg.SrcReg
1315 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1316 << ", " << RegShiftedReg.ShiftReg << ", "
1317 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1320 case ShiftedImmediate:
1321 OS << "<so_reg_imm "
1322 << RegShiftedImm.SrcReg
1323 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1324 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1327 case RotateImmediate:
1328 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1330 case BitfieldDescriptor:
1331 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1332 << ", width: " << Bitfield.Width << ">";
1335 case DPRRegisterList:
1336 case SPRRegisterList: {
1337 OS << "<register_list ";
1339 const SmallVectorImpl<unsigned> &RegList = getRegList();
1340 for (SmallVectorImpl<unsigned>::const_iterator
1341 I = RegList.begin(), E = RegList.end(); I != E; ) {
1343 if (++I < E) OS << ", ";
1350 OS << "'" << getToken() << "'";
1355 /// @name Auto-generated Match Functions
1358 static unsigned MatchRegisterName(StringRef Name);
1362 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1363 SMLoc &StartLoc, SMLoc &EndLoc) {
1364 RegNo = tryParseRegister();
1366 return (RegNo == (unsigned)-1);
1369 /// Try to parse a register name. The token must be an Identifier when called,
1370 /// and if it is a register name the token is eaten and the register number is
1371 /// returned. Otherwise return -1.
1373 int ARMAsmParser::tryParseRegister() {
1374 const AsmToken &Tok = Parser.getTok();
1375 if (Tok.isNot(AsmToken::Identifier)) return -1;
1377 // FIXME: Validate register for the current architecture; we have to do
1378 // validation later, so maybe there is no need for this here.
1379 std::string upperCase = Tok.getString().str();
1380 std::string lowerCase = LowercaseString(upperCase);
1381 unsigned RegNum = MatchRegisterName(lowerCase);
1383 RegNum = StringSwitch<unsigned>(lowerCase)
1384 .Case("r13", ARM::SP)
1385 .Case("r14", ARM::LR)
1386 .Case("r15", ARM::PC)
1387 .Case("ip", ARM::R12)
1390 if (!RegNum) return -1;
1392 Parser.Lex(); // Eat identifier token.
1396 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1397 // If a recoverable error occurs, return 1. If an irrecoverable error
1398 // occurs, return -1. An irrecoverable error is one where tokens have been
1399 // consumed in the process of trying to parse the shifter (i.e., when it is
1400 // indeed a shifter operand, but malformed).
1401 int ARMAsmParser::tryParseShiftRegister(
1402 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1403 SMLoc S = Parser.getTok().getLoc();
1404 const AsmToken &Tok = Parser.getTok();
1405 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1407 std::string upperCase = Tok.getString().str();
1408 std::string lowerCase = LowercaseString(upperCase);
1409 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1410 .Case("lsl", ARM_AM::lsl)
1411 .Case("lsr", ARM_AM::lsr)
1412 .Case("asr", ARM_AM::asr)
1413 .Case("ror", ARM_AM::ror)
1414 .Case("rrx", ARM_AM::rrx)
1415 .Default(ARM_AM::no_shift);
1417 if (ShiftTy == ARM_AM::no_shift)
1420 Parser.Lex(); // Eat the operator.
1422 // The source register for the shift has already been added to the
1423 // operand list, so we need to pop it off and combine it into the shifted
1424 // register operand instead.
1425 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1426 if (!PrevOp->isReg())
1427 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1428 int SrcReg = PrevOp->getReg();
1431 if (ShiftTy == ARM_AM::rrx) {
1432 // RRX Doesn't have an explicit shift amount. The encoder expects
1433 // the shift register to be the same as the source register. Seems odd,
1437 // Figure out if this is shifted by a constant or a register (for non-RRX).
1438 if (Parser.getTok().is(AsmToken::Hash)) {
1439 Parser.Lex(); // Eat hash.
1440 SMLoc ImmLoc = Parser.getTok().getLoc();
1441 const MCExpr *ShiftExpr = 0;
1442 if (getParser().ParseExpression(ShiftExpr)) {
1443 Error(ImmLoc, "invalid immediate shift value");
1446 // The expression must be evaluatable as an immediate.
1447 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1449 Error(ImmLoc, "invalid immediate shift value");
1452 // Range check the immediate.
1453 // lsl, ror: 0 <= imm <= 31
1454 // lsr, asr: 0 <= imm <= 32
1455 Imm = CE->getValue();
1457 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1458 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1459 Error(ImmLoc, "immediate shift value out of range");
1462 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1463 ShiftReg = tryParseRegister();
1464 SMLoc L = Parser.getTok().getLoc();
1465 if (ShiftReg == -1) {
1466 Error (L, "expected immediate or register in shift operand");
1470 Error (Parser.getTok().getLoc(),
1471 "expected immediate or register in shift operand");
1476 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1477 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1479 S, Parser.getTok().getLoc()));
1481 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1482 S, Parser.getTok().getLoc()));
1488 /// Try to parse a register name. The token must be an Identifier when called.
1489 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1490 /// if there is a "writeback". 'true' if it's not a register.
1492 /// TODO this is likely to change to allow different register types and or to
1493 /// parse for a specific register type.
1495 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1496 SMLoc S = Parser.getTok().getLoc();
1497 int RegNo = tryParseRegister();
1501 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1503 const AsmToken &ExclaimTok = Parser.getTok();
1504 if (ExclaimTok.is(AsmToken::Exclaim)) {
1505 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1506 ExclaimTok.getLoc()));
1507 Parser.Lex(); // Eat exclaim token
1513 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1514 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1516 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1517 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1519 switch (Name.size()) {
1522 if (Name[0] != CoprocOp)
1539 if (Name[0] != CoprocOp || Name[1] != '1')
1543 case '0': return 10;
1544 case '1': return 11;
1545 case '2': return 12;
1546 case '3': return 13;
1547 case '4': return 14;
1548 case '5': return 15;
1556 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1557 /// token must be an Identifier when called, and if it is a coprocessor
1558 /// number, the token is eaten and the operand is added to the operand list.
1559 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1560 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1561 SMLoc S = Parser.getTok().getLoc();
1562 const AsmToken &Tok = Parser.getTok();
1563 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1565 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1567 return MatchOperand_NoMatch;
1569 Parser.Lex(); // Eat identifier token.
1570 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1571 return MatchOperand_Success;
1574 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1575 /// token must be an Identifier when called, and if it is a coprocessor
1576 /// number, the token is eaten and the operand is added to the operand list.
1577 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1578 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1579 SMLoc S = Parser.getTok().getLoc();
1580 const AsmToken &Tok = Parser.getTok();
1581 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1583 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1585 return MatchOperand_NoMatch;
1587 Parser.Lex(); // Eat identifier token.
1588 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1589 return MatchOperand_Success;
1592 /// Parse a register list, return it if successful else return null. The first
1593 /// token must be a '{' when called.
1595 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1596 assert(Parser.getTok().is(AsmToken::LCurly) &&
1597 "Token is not a Left Curly Brace");
1598 SMLoc S = Parser.getTok().getLoc();
1600 // Read the rest of the registers in the list.
1601 unsigned PrevRegNum = 0;
1602 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1605 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1606 Parser.Lex(); // Eat non-identifier token.
1608 const AsmToken &RegTok = Parser.getTok();
1609 SMLoc RegLoc = RegTok.getLoc();
1610 if (RegTok.isNot(AsmToken::Identifier)) {
1611 Error(RegLoc, "register expected");
1615 int RegNum = tryParseRegister();
1617 Error(RegLoc, "register expected");
1622 int Reg = PrevRegNum;
1625 Registers.push_back(std::make_pair(Reg, RegLoc));
1626 } while (Reg != RegNum);
1628 Registers.push_back(std::make_pair(RegNum, RegLoc));
1631 PrevRegNum = RegNum;
1632 } while (Parser.getTok().is(AsmToken::Comma) ||
1633 Parser.getTok().is(AsmToken::Minus));
1635 // Process the right curly brace of the list.
1636 const AsmToken &RCurlyTok = Parser.getTok();
1637 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1638 Error(RCurlyTok.getLoc(), "'}' expected");
1642 SMLoc E = RCurlyTok.getLoc();
1643 Parser.Lex(); // Eat right curly brace token.
1645 // Verify the register list.
1646 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1647 RI = Registers.begin(), RE = Registers.end();
1649 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1650 bool EmittedWarning = false;
1652 DenseMap<unsigned, bool> RegMap;
1653 RegMap[HighRegNum] = true;
1655 for (++RI; RI != RE; ++RI) {
1656 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1657 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1660 Error(RegInfo.second, "register duplicated in register list");
1664 if (!EmittedWarning && Reg < HighRegNum)
1665 Warning(RegInfo.second,
1666 "register not in ascending order in register list");
1669 HighRegNum = std::max(Reg, HighRegNum);
1672 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1676 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1677 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1678 parseMemBarrierOptOperand(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 OptStr = Tok.getString();
1684 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1685 .Case("sy", ARM_MB::SY)
1686 .Case("st", ARM_MB::ST)
1687 .Case("sh", ARM_MB::ISH)
1688 .Case("ish", ARM_MB::ISH)
1689 .Case("shst", ARM_MB::ISHST)
1690 .Case("ishst", ARM_MB::ISHST)
1691 .Case("nsh", ARM_MB::NSH)
1692 .Case("un", ARM_MB::NSH)
1693 .Case("nshst", ARM_MB::NSHST)
1694 .Case("unst", ARM_MB::NSHST)
1695 .Case("osh", ARM_MB::OSH)
1696 .Case("oshst", ARM_MB::OSHST)
1700 return MatchOperand_NoMatch;
1702 Parser.Lex(); // Eat identifier token.
1703 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1704 return MatchOperand_Success;
1707 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1708 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1709 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1710 SMLoc S = Parser.getTok().getLoc();
1711 const AsmToken &Tok = Parser.getTok();
1712 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1713 StringRef IFlagsStr = Tok.getString();
1715 unsigned IFlags = 0;
1716 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1717 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1718 .Case("a", ARM_PROC::A)
1719 .Case("i", ARM_PROC::I)
1720 .Case("f", ARM_PROC::F)
1723 // If some specific iflag is already set, it means that some letter is
1724 // present more than once, this is not acceptable.
1725 if (Flag == ~0U || (IFlags & Flag))
1726 return MatchOperand_NoMatch;
1731 Parser.Lex(); // Eat identifier token.
1732 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1733 return MatchOperand_Success;
1736 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1737 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1738 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1739 SMLoc S = Parser.getTok().getLoc();
1740 const AsmToken &Tok = Parser.getTok();
1741 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1742 StringRef Mask = Tok.getString();
1744 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1745 size_t Start = 0, Next = Mask.find('_');
1746 StringRef Flags = "";
1747 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1748 if (Next != StringRef::npos)
1749 Flags = Mask.slice(Next+1, Mask.size());
1751 // FlagsVal contains the complete mask:
1753 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1754 unsigned FlagsVal = 0;
1756 if (SpecReg == "apsr") {
1757 FlagsVal = StringSwitch<unsigned>(Flags)
1758 .Case("nzcvq", 0x8) // same as CPSR_f
1759 .Case("g", 0x4) // same as CPSR_s
1760 .Case("nzcvqg", 0xc) // same as CPSR_fs
1763 if (FlagsVal == ~0U) {
1765 return MatchOperand_NoMatch;
1767 FlagsVal = 0; // No flag
1769 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1770 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1772 for (int i = 0, e = Flags.size(); i != e; ++i) {
1773 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1780 // If some specific flag is already set, it means that some letter is
1781 // present more than once, this is not acceptable.
1782 if (FlagsVal == ~0U || (FlagsVal & Flag))
1783 return MatchOperand_NoMatch;
1786 } else // No match for special register.
1787 return MatchOperand_NoMatch;
1789 // Special register without flags are equivalent to "fc" flags.
1793 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1794 if (SpecReg == "spsr")
1797 Parser.Lex(); // Eat identifier token.
1798 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1799 return MatchOperand_Success;
1802 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1803 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1804 int Low, int High) {
1805 const AsmToken &Tok = Parser.getTok();
1806 if (Tok.isNot(AsmToken::Identifier)) {
1807 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1808 return MatchOperand_ParseFail;
1810 StringRef ShiftName = Tok.getString();
1811 std::string LowerOp = LowercaseString(Op);
1812 std::string UpperOp = UppercaseString(Op);
1813 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1814 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1815 return MatchOperand_ParseFail;
1817 Parser.Lex(); // Eat shift type token.
1819 // There must be a '#' and a shift amount.
1820 if (Parser.getTok().isNot(AsmToken::Hash)) {
1821 Error(Parser.getTok().getLoc(), "'#' expected");
1822 return MatchOperand_ParseFail;
1824 Parser.Lex(); // Eat hash token.
1826 const MCExpr *ShiftAmount;
1827 SMLoc Loc = Parser.getTok().getLoc();
1828 if (getParser().ParseExpression(ShiftAmount)) {
1829 Error(Loc, "illegal expression");
1830 return MatchOperand_ParseFail;
1832 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1834 Error(Loc, "constant expression expected");
1835 return MatchOperand_ParseFail;
1837 int Val = CE->getValue();
1838 if (Val < Low || Val > High) {
1839 Error(Loc, "immediate value out of range");
1840 return MatchOperand_ParseFail;
1843 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1845 return MatchOperand_Success;
1848 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1849 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1850 const AsmToken &Tok = Parser.getTok();
1851 SMLoc S = Tok.getLoc();
1852 if (Tok.isNot(AsmToken::Identifier)) {
1853 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1854 return MatchOperand_ParseFail;
1856 int Val = StringSwitch<int>(Tok.getString())
1860 Parser.Lex(); // Eat the token.
1863 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1864 return MatchOperand_ParseFail;
1866 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1868 S, Parser.getTok().getLoc()));
1869 return MatchOperand_Success;
1872 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1873 /// instructions. Legal values are:
1874 /// lsl #n 'n' in [0,31]
1875 /// asr #n 'n' in [1,32]
1876 /// n == 32 encoded as n == 0.
1877 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1878 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1879 const AsmToken &Tok = Parser.getTok();
1880 SMLoc S = Tok.getLoc();
1881 if (Tok.isNot(AsmToken::Identifier)) {
1882 Error(S, "shift operator 'asr' or 'lsl' expected");
1883 return MatchOperand_ParseFail;
1885 StringRef ShiftName = Tok.getString();
1887 if (ShiftName == "lsl" || ShiftName == "LSL")
1889 else if (ShiftName == "asr" || ShiftName == "ASR")
1892 Error(S, "shift operator 'asr' or 'lsl' expected");
1893 return MatchOperand_ParseFail;
1895 Parser.Lex(); // Eat the operator.
1897 // A '#' and a shift amount.
1898 if (Parser.getTok().isNot(AsmToken::Hash)) {
1899 Error(Parser.getTok().getLoc(), "'#' expected");
1900 return MatchOperand_ParseFail;
1902 Parser.Lex(); // Eat hash token.
1904 const MCExpr *ShiftAmount;
1905 SMLoc E = Parser.getTok().getLoc();
1906 if (getParser().ParseExpression(ShiftAmount)) {
1907 Error(E, "malformed shift expression");
1908 return MatchOperand_ParseFail;
1910 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1912 Error(E, "shift amount must be an immediate");
1913 return MatchOperand_ParseFail;
1916 int64_t Val = CE->getValue();
1918 // Shift amount must be in [1,32]
1919 if (Val < 1 || Val > 32) {
1920 Error(E, "'asr' shift amount must be in range [1,32]");
1921 return MatchOperand_ParseFail;
1923 // asr #32 encoded as asr #0.
1924 if (Val == 32) Val = 0;
1926 // Shift amount must be in [1,32]
1927 if (Val < 0 || Val > 31) {
1928 Error(E, "'lsr' shift amount must be in range [0,31]");
1929 return MatchOperand_ParseFail;
1933 E = Parser.getTok().getLoc();
1934 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1936 return MatchOperand_Success;
1939 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1940 /// of instructions. Legal values are:
1941 /// ror #n 'n' in {0, 8, 16, 24}
1942 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1943 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1944 const AsmToken &Tok = Parser.getTok();
1945 SMLoc S = Tok.getLoc();
1946 if (Tok.isNot(AsmToken::Identifier)) {
1947 Error(S, "rotate operator 'ror' expected");
1948 return MatchOperand_ParseFail;
1950 StringRef ShiftName = Tok.getString();
1951 if (ShiftName != "ror" && ShiftName != "ROR") {
1952 Error(S, "rotate operator 'ror' expected");
1953 return MatchOperand_ParseFail;
1955 Parser.Lex(); // Eat the operator.
1957 // A '#' and a rotate amount.
1958 if (Parser.getTok().isNot(AsmToken::Hash)) {
1959 Error(Parser.getTok().getLoc(), "'#' expected");
1960 return MatchOperand_ParseFail;
1962 Parser.Lex(); // Eat hash token.
1964 const MCExpr *ShiftAmount;
1965 SMLoc E = Parser.getTok().getLoc();
1966 if (getParser().ParseExpression(ShiftAmount)) {
1967 Error(E, "malformed rotate expression");
1968 return MatchOperand_ParseFail;
1970 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1972 Error(E, "rotate amount must be an immediate");
1973 return MatchOperand_ParseFail;
1976 int64_t Val = CE->getValue();
1977 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1978 // normally, zero is represented in asm by omitting the rotate operand
1980 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1981 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1982 return MatchOperand_ParseFail;
1985 E = Parser.getTok().getLoc();
1986 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1988 return MatchOperand_Success;
1991 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1992 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1993 SMLoc S = Parser.getTok().getLoc();
1994 // The bitfield descriptor is really two operands, the LSB and the width.
1995 if (Parser.getTok().isNot(AsmToken::Hash)) {
1996 Error(Parser.getTok().getLoc(), "'#' expected");
1997 return MatchOperand_ParseFail;
1999 Parser.Lex(); // Eat hash token.
2001 const MCExpr *LSBExpr;
2002 SMLoc E = Parser.getTok().getLoc();
2003 if (getParser().ParseExpression(LSBExpr)) {
2004 Error(E, "malformed immediate expression");
2005 return MatchOperand_ParseFail;
2007 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2009 Error(E, "'lsb' operand must be an immediate");
2010 return MatchOperand_ParseFail;
2013 int64_t LSB = CE->getValue();
2014 // The LSB must be in the range [0,31]
2015 if (LSB < 0 || LSB > 31) {
2016 Error(E, "'lsb' operand must be in the range [0,31]");
2017 return MatchOperand_ParseFail;
2019 E = Parser.getTok().getLoc();
2021 // Expect another immediate operand.
2022 if (Parser.getTok().isNot(AsmToken::Comma)) {
2023 Error(Parser.getTok().getLoc(), "too few operands");
2024 return MatchOperand_ParseFail;
2026 Parser.Lex(); // Eat hash token.
2027 if (Parser.getTok().isNot(AsmToken::Hash)) {
2028 Error(Parser.getTok().getLoc(), "'#' expected");
2029 return MatchOperand_ParseFail;
2031 Parser.Lex(); // Eat hash token.
2033 const MCExpr *WidthExpr;
2034 if (getParser().ParseExpression(WidthExpr)) {
2035 Error(E, "malformed immediate expression");
2036 return MatchOperand_ParseFail;
2038 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2040 Error(E, "'width' operand must be an immediate");
2041 return MatchOperand_ParseFail;
2044 int64_t Width = CE->getValue();
2045 // The LSB must be in the range [1,32-lsb]
2046 if (Width < 1 || Width > 32 - LSB) {
2047 Error(E, "'width' operand must be in the range [1,32-lsb]");
2048 return MatchOperand_ParseFail;
2050 E = Parser.getTok().getLoc();
2052 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2054 return MatchOperand_Success;
2057 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2058 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2059 // Check for a post-index addressing register operand. Specifically:
2060 // postidx_reg := '+' register {, shift}
2061 // | '-' register {, shift}
2062 // | register {, shift}
2064 // This method must return MatchOperand_NoMatch without consuming any tokens
2065 // in the case where there is no match, as other alternatives take other
2067 AsmToken Tok = Parser.getTok();
2068 SMLoc S = Tok.getLoc();
2069 bool haveEaten = false;
2072 if (Tok.is(AsmToken::Plus)) {
2073 Parser.Lex(); // Eat the '+' token.
2075 } else if (Tok.is(AsmToken::Minus)) {
2076 Parser.Lex(); // Eat the '-' token.
2080 if (Parser.getTok().is(AsmToken::Identifier))
2081 Reg = tryParseRegister();
2084 return MatchOperand_NoMatch;
2085 Error(Parser.getTok().getLoc(), "register expected");
2086 return MatchOperand_ParseFail;
2088 SMLoc E = Parser.getTok().getLoc();
2090 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2091 unsigned ShiftImm = 0;
2092 if (Parser.getTok().is(AsmToken::Comma)) {
2093 Parser.Lex(); // Eat the ','.
2094 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2095 return MatchOperand_ParseFail;
2098 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2101 return MatchOperand_Success;
2104 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2105 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2106 // Check for a post-index addressing register operand. Specifically:
2107 // am3offset := '+' register
2114 // This method must return MatchOperand_NoMatch without consuming any tokens
2115 // in the case where there is no match, as other alternatives take other
2117 AsmToken Tok = Parser.getTok();
2118 SMLoc S = Tok.getLoc();
2120 // Do immediates first, as we always parse those if we have a '#'.
2121 if (Parser.getTok().is(AsmToken::Hash)) {
2122 Parser.Lex(); // Eat the '#'.
2123 // Explicitly look for a '-', as we need to encode negative zero
2125 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2126 const MCExpr *Offset;
2127 if (getParser().ParseExpression(Offset))
2128 return MatchOperand_ParseFail;
2129 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2131 Error(S, "constant expression expected");
2132 return MatchOperand_ParseFail;
2134 SMLoc E = Tok.getLoc();
2135 // Negative zero is encoded as the flag value INT32_MIN.
2136 int32_t Val = CE->getValue();
2137 if (isNegative && Val == 0)
2141 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2143 return MatchOperand_Success;
2147 bool haveEaten = false;
2150 if (Tok.is(AsmToken::Plus)) {
2151 Parser.Lex(); // Eat the '+' token.
2153 } else if (Tok.is(AsmToken::Minus)) {
2154 Parser.Lex(); // Eat the '-' token.
2158 if (Parser.getTok().is(AsmToken::Identifier))
2159 Reg = tryParseRegister();
2162 return MatchOperand_NoMatch;
2163 Error(Parser.getTok().getLoc(), "register expected");
2164 return MatchOperand_ParseFail;
2166 SMLoc E = Parser.getTok().getLoc();
2168 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2171 return MatchOperand_Success;
2174 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2175 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2176 /// when they refer multiple MIOperands inside a single one.
2178 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2179 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2180 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2182 // Create a writeback register dummy placeholder.
2183 Inst.addOperand(MCOperand::CreateImm(0));
2185 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2186 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2190 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2191 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2192 /// when they refer multiple MIOperands inside a single one.
2194 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2195 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2196 // Create a writeback register dummy placeholder.
2197 Inst.addOperand(MCOperand::CreateImm(0));
2198 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2199 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2200 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2204 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2205 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2206 /// when they refer multiple MIOperands inside a single one.
2208 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2209 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2210 // Create a writeback register dummy placeholder.
2211 Inst.addOperand(MCOperand::CreateImm(0));
2212 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2213 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2214 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2218 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2219 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2220 /// when they refer multiple MIOperands inside a single one.
2222 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2223 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2224 // Create a writeback register dummy placeholder.
2225 Inst.addOperand(MCOperand::CreateImm(0));
2226 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2227 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2228 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2232 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2233 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2234 /// when they refer multiple MIOperands inside a single one.
2236 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2237 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2239 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2240 // Create a writeback register dummy placeholder.
2241 Inst.addOperand(MCOperand::CreateImm(0));
2243 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2245 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2247 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2251 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2252 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2253 /// when they refer multiple MIOperands inside a single one.
2255 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2256 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2258 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2259 // Create a writeback register dummy placeholder.
2260 Inst.addOperand(MCOperand::CreateImm(0));
2262 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2264 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2266 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2270 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2271 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2272 /// when they refer multiple MIOperands inside a single one.
2274 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2275 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2276 // Create a writeback register dummy placeholder.
2277 Inst.addOperand(MCOperand::CreateImm(0));
2279 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2281 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2283 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2285 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2289 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2290 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2291 /// when they refer multiple MIOperands inside a single one.
2293 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2294 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2295 // Create a writeback register dummy placeholder.
2296 Inst.addOperand(MCOperand::CreateImm(0));
2298 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2300 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2302 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2304 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2308 /// cvtLdrdPre - Convert parsed operands to MCInst.
2309 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2310 /// when they refer multiple MIOperands inside a single one.
2312 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2313 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2315 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2316 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2317 // Create a writeback register dummy placeholder.
2318 Inst.addOperand(MCOperand::CreateImm(0));
2320 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2322 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2326 /// cvtStrdPre - Convert parsed operands to MCInst.
2327 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2328 /// when they refer multiple MIOperands inside a single one.
2330 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2331 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2332 // Create a writeback register dummy placeholder.
2333 Inst.addOperand(MCOperand::CreateImm(0));
2335 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2336 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2338 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2340 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2344 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2345 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2346 /// when they refer multiple MIOperands inside a single one.
2348 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2349 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2350 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2351 // Create a writeback register dummy placeholder.
2352 Inst.addOperand(MCOperand::CreateImm(0));
2353 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2354 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2359 /// Parse an ARM memory expression, return false if successful else return true
2360 /// or an error. The first token must be a '[' when called.
2362 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2364 assert(Parser.getTok().is(AsmToken::LBrac) &&
2365 "Token is not a Left Bracket");
2366 S = Parser.getTok().getLoc();
2367 Parser.Lex(); // Eat left bracket token.
2369 const AsmToken &BaseRegTok = Parser.getTok();
2370 int BaseRegNum = tryParseRegister();
2371 if (BaseRegNum == -1)
2372 return Error(BaseRegTok.getLoc(), "register expected");
2374 // The next token must either be a comma or a closing bracket.
2375 const AsmToken &Tok = Parser.getTok();
2376 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2377 return Error(Tok.getLoc(), "malformed memory operand");
2379 if (Tok.is(AsmToken::RBrac)) {
2381 Parser.Lex(); // Eat right bracket token.
2383 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2389 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2390 Parser.Lex(); // Eat the comma.
2392 // If we have a '#' it's an immediate offset, else assume it's a register
2394 if (Parser.getTok().is(AsmToken::Hash)) {
2395 Parser.Lex(); // Eat the '#'.
2396 E = Parser.getTok().getLoc();
2398 // FIXME: Special case #-0 so we can correctly set the U bit.
2400 const MCExpr *Offset;
2401 if (getParser().ParseExpression(Offset))
2404 // The expression has to be a constant. Memory references with relocations
2405 // don't come through here, as they use the <label> forms of the relevant
2407 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2409 return Error (E, "constant expression expected");
2411 // Now we should have the closing ']'
2412 E = Parser.getTok().getLoc();
2413 if (Parser.getTok().isNot(AsmToken::RBrac))
2414 return Error(E, "']' expected");
2415 Parser.Lex(); // Eat right bracket token.
2417 // Don't worry about range checking the value here. That's handled by
2418 // the is*() predicates.
2419 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2420 ARM_AM::no_shift, 0, false, S,E));
2422 // If there's a pre-indexing writeback marker, '!', just add it as a token
2424 if (Parser.getTok().is(AsmToken::Exclaim)) {
2425 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2426 Parser.Lex(); // Eat the '!'.
2432 // The register offset is optionally preceded by a '+' or '-'
2433 bool isNegative = false;
2434 if (Parser.getTok().is(AsmToken::Minus)) {
2436 Parser.Lex(); // Eat the '-'.
2437 } else if (Parser.getTok().is(AsmToken::Plus)) {
2439 Parser.Lex(); // Eat the '+'.
2442 E = Parser.getTok().getLoc();
2443 int OffsetRegNum = tryParseRegister();
2444 if (OffsetRegNum == -1)
2445 return Error(E, "register expected");
2447 // If there's a shift operator, handle it.
2448 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2449 unsigned ShiftImm = 0;
2450 if (Parser.getTok().is(AsmToken::Comma)) {
2451 Parser.Lex(); // Eat the ','.
2452 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2456 // Now we should have the closing ']'
2457 E = Parser.getTok().getLoc();
2458 if (Parser.getTok().isNot(AsmToken::RBrac))
2459 return Error(E, "']' expected");
2460 Parser.Lex(); // Eat right bracket token.
2462 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2463 ShiftType, ShiftImm, isNegative,
2466 // If there's a pre-indexing writeback marker, '!', just add it as a token
2468 if (Parser.getTok().is(AsmToken::Exclaim)) {
2469 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2470 Parser.Lex(); // Eat the '!'.
2476 /// parseMemRegOffsetShift - one of these two:
2477 /// ( lsl | lsr | asr | ror ) , # shift_amount
2479 /// return true if it parses a shift otherwise it returns false.
2480 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2482 SMLoc Loc = Parser.getTok().getLoc();
2483 const AsmToken &Tok = Parser.getTok();
2484 if (Tok.isNot(AsmToken::Identifier))
2486 StringRef ShiftName = Tok.getString();
2487 if (ShiftName == "lsl" || ShiftName == "LSL")
2489 else if (ShiftName == "lsr" || ShiftName == "LSR")
2491 else if (ShiftName == "asr" || ShiftName == "ASR")
2493 else if (ShiftName == "ror" || ShiftName == "ROR")
2495 else if (ShiftName == "rrx" || ShiftName == "RRX")
2498 return Error(Loc, "illegal shift operator");
2499 Parser.Lex(); // Eat shift type token.
2501 // rrx stands alone.
2503 if (St != ARM_AM::rrx) {
2504 Loc = Parser.getTok().getLoc();
2505 // A '#' and a shift amount.
2506 const AsmToken &HashTok = Parser.getTok();
2507 if (HashTok.isNot(AsmToken::Hash))
2508 return Error(HashTok.getLoc(), "'#' expected");
2509 Parser.Lex(); // Eat hash token.
2512 if (getParser().ParseExpression(Expr))
2514 // Range check the immediate.
2515 // lsl, ror: 0 <= imm <= 31
2516 // lsr, asr: 0 <= imm <= 32
2517 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2519 return Error(Loc, "shift amount must be an immediate");
2520 int64_t Imm = CE->getValue();
2522 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2523 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2524 return Error(Loc, "immediate shift value out of range");
2531 /// Parse a arm instruction operand. For now this parses the operand regardless
2532 /// of the mnemonic.
2533 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2534 StringRef Mnemonic) {
2537 // Check if the current operand has a custom associated parser, if so, try to
2538 // custom parse the operand, or fallback to the general approach.
2539 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2540 if (ResTy == MatchOperand_Success)
2542 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2543 // there was a match, but an error occurred, in which case, just return that
2544 // the operand parsing failed.
2545 if (ResTy == MatchOperand_ParseFail)
2548 switch (getLexer().getKind()) {
2550 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2552 case AsmToken::Identifier: {
2553 if (!tryParseRegisterWithWriteBack(Operands))
2555 int Res = tryParseShiftRegister(Operands);
2556 if (Res == 0) // success
2558 else if (Res == -1) // irrecoverable error
2561 // Fall though for the Identifier case that is not a register or a
2564 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2565 case AsmToken::Dot: { // . as a branch target
2566 // This was not a register so parse other operands that start with an
2567 // identifier (like labels) as expressions and create them as immediates.
2568 const MCExpr *IdVal;
2569 S = Parser.getTok().getLoc();
2570 if (getParser().ParseExpression(IdVal))
2572 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2573 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2576 case AsmToken::LBrac:
2577 return parseMemory(Operands);
2578 case AsmToken::LCurly:
2579 return parseRegisterList(Operands);
2580 case AsmToken::Hash:
2581 // #42 -> immediate.
2582 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2583 S = Parser.getTok().getLoc();
2585 const MCExpr *ImmVal;
2586 if (getParser().ParseExpression(ImmVal))
2588 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2589 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2591 case AsmToken::Colon: {
2592 // ":lower16:" and ":upper16:" expression prefixes
2593 // FIXME: Check it's an expression prefix,
2594 // e.g. (FOO - :lower16:BAR) isn't legal.
2595 ARMMCExpr::VariantKind RefKind;
2596 if (parsePrefix(RefKind))
2599 const MCExpr *SubExprVal;
2600 if (getParser().ParseExpression(SubExprVal))
2603 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2605 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2606 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2612 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2613 // :lower16: and :upper16:.
2614 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2615 RefKind = ARMMCExpr::VK_ARM_None;
2617 // :lower16: and :upper16: modifiers
2618 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2619 Parser.Lex(); // Eat ':'
2621 if (getLexer().isNot(AsmToken::Identifier)) {
2622 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2626 StringRef IDVal = Parser.getTok().getIdentifier();
2627 if (IDVal == "lower16") {
2628 RefKind = ARMMCExpr::VK_ARM_LO16;
2629 } else if (IDVal == "upper16") {
2630 RefKind = ARMMCExpr::VK_ARM_HI16;
2632 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2637 if (getLexer().isNot(AsmToken::Colon)) {
2638 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2641 Parser.Lex(); // Eat the last ':'
2646 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2647 MCSymbolRefExpr::VariantKind Variant) {
2648 // Recurse over the given expression, rebuilding it to apply the given variant
2649 // to the leftmost symbol.
2650 if (Variant == MCSymbolRefExpr::VK_None)
2653 switch (E->getKind()) {
2654 case MCExpr::Target:
2655 llvm_unreachable("Can't handle target expr yet");
2656 case MCExpr::Constant:
2657 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2659 case MCExpr::SymbolRef: {
2660 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2662 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2665 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2669 llvm_unreachable("Can't handle unary expressions yet");
2671 case MCExpr::Binary: {
2672 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2673 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2674 const MCExpr *RHS = BE->getRHS();
2678 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2682 assert(0 && "Invalid expression kind!");
2686 /// \brief Given a mnemonic, split out possible predication code and carry
2687 /// setting letters to form a canonical mnemonic and flags.
2689 // FIXME: Would be nice to autogen this.
2690 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2691 unsigned &PredicationCode,
2693 unsigned &ProcessorIMod) {
2694 PredicationCode = ARMCC::AL;
2695 CarrySetting = false;
2698 // Ignore some mnemonics we know aren't predicated forms.
2700 // FIXME: Would be nice to autogen this.
2701 if ((Mnemonic == "movs" && isThumb()) ||
2702 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2703 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2704 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2705 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2706 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2707 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2708 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2711 // First, split out any predication code. Ignore mnemonics we know aren't
2712 // predicated but do have a carry-set and so weren't caught above.
2713 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2714 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2715 Mnemonic != "umlals" && Mnemonic != "umulls") {
2716 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2717 .Case("eq", ARMCC::EQ)
2718 .Case("ne", ARMCC::NE)
2719 .Case("hs", ARMCC::HS)
2720 .Case("cs", ARMCC::HS)
2721 .Case("lo", ARMCC::LO)
2722 .Case("cc", ARMCC::LO)
2723 .Case("mi", ARMCC::MI)
2724 .Case("pl", ARMCC::PL)
2725 .Case("vs", ARMCC::VS)
2726 .Case("vc", ARMCC::VC)
2727 .Case("hi", ARMCC::HI)
2728 .Case("ls", ARMCC::LS)
2729 .Case("ge", ARMCC::GE)
2730 .Case("lt", ARMCC::LT)
2731 .Case("gt", ARMCC::GT)
2732 .Case("le", ARMCC::LE)
2733 .Case("al", ARMCC::AL)
2736 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2737 PredicationCode = CC;
2741 // Next, determine if we have a carry setting bit. We explicitly ignore all
2742 // the instructions we know end in 's'.
2743 if (Mnemonic.endswith("s") &&
2744 !(Mnemonic == "cps" || Mnemonic == "mls" ||
2745 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2746 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2747 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2748 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2749 (Mnemonic == "movs" && isThumb()))) {
2750 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2751 CarrySetting = true;
2754 // The "cps" instruction can have a interrupt mode operand which is glued into
2755 // the mnemonic. Check if this is the case, split it and parse the imod op
2756 if (Mnemonic.startswith("cps")) {
2757 // Split out any imod code.
2759 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2760 .Case("ie", ARM_PROC::IE)
2761 .Case("id", ARM_PROC::ID)
2764 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2765 ProcessorIMod = IMod;
2772 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2773 /// inclusion of carry set or predication code operands.
2775 // FIXME: It would be nice to autogen this.
2777 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2778 bool &CanAcceptPredicationCode) {
2779 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2780 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2781 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2782 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2783 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2784 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2785 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2786 Mnemonic == "eor" || Mnemonic == "smlal" ||
2787 // FIXME: We need a better way. This really confused Thumb2
2788 // parsing for 'mov'.
2789 (Mnemonic == "mov" && !isThumbOne())) {
2790 CanAcceptCarrySet = true;
2792 CanAcceptCarrySet = false;
2795 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2796 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2797 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2798 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2799 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2800 Mnemonic == "setend" ||
2801 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2802 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2804 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2805 CanAcceptPredicationCode = false;
2807 CanAcceptPredicationCode = true;
2811 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2812 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2813 CanAcceptPredicationCode = false;
2816 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
2817 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2819 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2820 // another does not. Specifically, the MOVW instruction does not. So we
2821 // special case it here and remove the defaulted (non-setting) cc_out
2822 // operand if that's the instruction we're trying to match.
2824 // We do this as post-processing of the explicit operands rather than just
2825 // conditionally adding the cc_out in the first place because we need
2826 // to check the type of the parsed immediate operand.
2827 if (Mnemonic == "mov" && Operands.size() > 4 &&
2828 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2829 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2830 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2833 // Register-register 'add' for thumb does not have a cc_out operand
2834 // when there are only two register operands.
2835 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
2836 static_cast<ARMOperand*>(Operands[3])->isReg() &&
2837 static_cast<ARMOperand*>(Operands[4])->isReg() &&
2838 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2844 /// Parse an arm instruction mnemonic followed by its operands.
2845 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2846 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2847 // Create the leading tokens for the mnemonic, split by '.' characters.
2848 size_t Start = 0, Next = Name.find('.');
2849 StringRef Mnemonic = Name.slice(Start, Next);
2851 // Split out the predication code and carry setting flag from the mnemonic.
2852 unsigned PredicationCode;
2853 unsigned ProcessorIMod;
2855 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2858 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2860 // FIXME: This is all a pretty gross hack. We should automatically handle
2861 // optional operands like this via tblgen.
2863 // Next, add the CCOut and ConditionCode operands, if needed.
2865 // For mnemonics which can ever incorporate a carry setting bit or predication
2866 // code, our matching model involves us always generating CCOut and
2867 // ConditionCode operands to match the mnemonic "as written" and then we let
2868 // the matcher deal with finding the right instruction or generating an
2869 // appropriate error.
2870 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2871 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2873 // If we had a carry-set on an instruction that can't do that, issue an
2875 if (!CanAcceptCarrySet && CarrySetting) {
2876 Parser.EatToEndOfStatement();
2877 return Error(NameLoc, "instruction '" + Mnemonic +
2878 "' can not set flags, but 's' suffix specified");
2880 // If we had a predication code on an instruction that can't do that, issue an
2882 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2883 Parser.EatToEndOfStatement();
2884 return Error(NameLoc, "instruction '" + Mnemonic +
2885 "' is not predicable, but condition code specified");
2888 // Add the carry setting operand, if necessary.
2890 // FIXME: It would be awesome if we could somehow invent a location such that
2891 // match errors on this operand would print a nice diagnostic about how the
2892 // 's' character in the mnemonic resulted in a CCOut operand.
2893 if (CanAcceptCarrySet)
2894 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2897 // Add the predication code operand, if necessary.
2898 if (CanAcceptPredicationCode) {
2899 Operands.push_back(ARMOperand::CreateCondCode(
2900 ARMCC::CondCodes(PredicationCode), NameLoc));
2903 // Add the processor imod operand, if necessary.
2904 if (ProcessorIMod) {
2905 Operands.push_back(ARMOperand::CreateImm(
2906 MCConstantExpr::Create(ProcessorIMod, getContext()),
2909 // This mnemonic can't ever accept a imod, but the user wrote
2910 // one (or misspelled another mnemonic).
2912 // FIXME: Issue a nice error.
2915 // Add the remaining tokens in the mnemonic.
2916 while (Next != StringRef::npos) {
2918 Next = Name.find('.', Start + 1);
2919 StringRef ExtraToken = Name.slice(Start, Next);
2921 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2924 // Read the remaining operands.
2925 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2926 // Read the first operand.
2927 if (parseOperand(Operands, Mnemonic)) {
2928 Parser.EatToEndOfStatement();
2932 while (getLexer().is(AsmToken::Comma)) {
2933 Parser.Lex(); // Eat the comma.
2935 // Parse and remember the operand.
2936 if (parseOperand(Operands, Mnemonic)) {
2937 Parser.EatToEndOfStatement();
2943 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2944 Parser.EatToEndOfStatement();
2945 return TokError("unexpected token in argument list");
2948 Parser.Lex(); // Consume the EndOfStatement
2950 // Some instructions, mostly Thumb, have forms for the same mnemonic that
2951 // do and don't have a cc_out optional-def operand. With some spot-checks
2952 // of the operand list, we can figure out which variant we're trying to
2953 // parse and adjust accordingly before actually matching. Reason number
2954 // #317 the table driven matcher doesn't fit well with the ARM instruction
2956 if (shouldOmitCCOutOperand(Mnemonic, Operands)) {
2957 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2958 Operands.erase(Operands.begin() + 1);
2962 // ARM mode 'blx' need special handling, as the register operand version
2963 // is predicable, but the label operand version is not. So, we can't rely
2964 // on the Mnemonic based checking to correctly figure out when to put
2965 // a CondCode operand in the list. If we're trying to match the label
2966 // version, remove the CondCode operand here.
2967 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2968 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2969 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2970 Operands.erase(Operands.begin() + 1);
2974 // The vector-compare-to-zero instructions have a literal token "#0" at
2975 // the end that comes to here as an immediate operand. Convert it to a
2976 // token to play nicely with the matcher.
2977 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
2978 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
2979 static_cast<ARMOperand*>(Operands[5])->isImm()) {
2980 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
2981 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
2982 if (CE && CE->getValue() == 0) {
2983 Operands.erase(Operands.begin() + 5);
2984 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
2991 // Validate context-sensitive operand constraints.
2992 // FIXME: We would really like to be able to tablegen'erate this.
2994 validateInstruction(MCInst &Inst,
2995 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2996 switch (Inst.getOpcode()) {
2999 case ARM::LDRD_POST:
3001 // Rt2 must be Rt + 1.
3002 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3003 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3005 return Error(Operands[3]->getStartLoc(),
3006 "destination operands must be sequential");
3010 // Rt2 must be Rt + 1.
3011 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3012 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3014 return Error(Operands[3]->getStartLoc(),
3015 "source operands must be sequential");
3019 case ARM::STRD_POST:
3021 // Rt2 must be Rt + 1.
3022 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3023 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3025 return Error(Operands[3]->getStartLoc(),
3026 "source operands must be sequential");
3031 // width must be in range [1, 32-lsb]
3032 unsigned lsb = Inst.getOperand(2).getImm();
3033 unsigned widthm1 = Inst.getOperand(3).getImm();
3034 if (widthm1 >= 32 - lsb)
3035 return Error(Operands[5]->getStartLoc(),
3036 "bitfield width must be in range [1,32-lsb]");
3040 // Thumb LDM instructions are writeback iff the base register is not
3041 // in the register list.
3042 unsigned Rn = Inst.getOperand(0).getReg();
3043 bool doesWriteback = true;
3044 for (unsigned i = 3; i < Inst.getNumOperands(); ++i) {
3045 unsigned Reg = Inst.getOperand(i).getReg();
3047 doesWriteback = false;
3048 // Anything other than a low register isn't legal here.
3049 if (!isARMLowRegister(Reg))
3050 return Error(Operands[4]->getStartLoc(),
3051 "registers must be in range r0-r7");
3053 // If we should have writeback, then there should be a '!' token.
3054 if (doesWriteback &&
3055 (!static_cast<ARMOperand*>(Operands[3])->isToken() ||
3056 static_cast<ARMOperand*>(Operands[3])->getToken() != "!"))
3057 return Error(Operands[2]->getStartLoc(),
3058 "writeback operator '!' expected");
3068 processInstruction(MCInst &Inst,
3069 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3070 switch (Inst.getOpcode()) {
3071 case ARM::LDMIA_UPD:
3072 // If this is a load of a single register via a 'pop', then we should use
3073 // a post-indexed LDR instruction instead, per the ARM ARM.
3074 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3075 Inst.getNumOperands() == 5) {
3077 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3078 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3079 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3080 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3081 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3082 TmpInst.addOperand(MCOperand::CreateImm(4));
3083 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3084 TmpInst.addOperand(Inst.getOperand(3));
3088 case ARM::STMDB_UPD:
3089 // If this is a store of a single register via a 'push', then we should use
3090 // a pre-indexed STR instruction instead, per the ARM ARM.
3091 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3092 Inst.getNumOperands() == 5) {
3094 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3095 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3096 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3097 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3098 TmpInst.addOperand(MCOperand::CreateImm(-4));
3099 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3100 TmpInst.addOperand(Inst.getOperand(3));
3105 // If the immediate is in the range 0-7, we really wanted tADDi3.
3106 if (Inst.getOperand(3).getImm() < 8)
3107 Inst.setOpcode(ARM::tADDi3);
3110 // If the conditional is AL, we really want tB.
3111 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3112 Inst.setOpcode(ARM::tB);
3117 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3118 // the ARMInsts array) instead. Getting that here requires awkward
3119 // API changes, though. Better way?
3121 extern MCInstrDesc ARMInsts[];
3123 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3124 return ARMInsts[Opcode];
3127 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3128 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3129 // suffix depending on whether they're in an IT block or not.
3130 unsigned Opc = Inst.getOpcode();
3131 MCInstrDesc &MCID = getInstDesc(Opc);
3132 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3133 assert(MCID.hasOptionalDef() &&
3134 "optionally flag setting instruction missing optional def operand");
3135 assert(MCID.NumOperands == Inst.getNumOperands() &&
3136 "operand count mismatch!");
3137 // Find the optional-def operand (cc_out).
3140 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3143 // If we're parsing Thumb1, reject it completely.
3144 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3145 return Match_MnemonicFail;
3146 // If we're parsing Thumb2, which form is legal depends on whether we're
3148 // FIXME: We don't yet do IT blocks, so just always consider it to be
3149 // that we aren't in one until we do.
3150 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3151 return Match_RequiresITBlock;
3153 // Some high-register supporting Thumb1 encodings only allow both registers
3154 // to be from r0-r7 when in Thumb2.
3155 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3156 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3157 isARMLowRegister(Inst.getOperand(2).getReg()))
3158 return Match_RequiresThumb2;
3159 // Others only require ARMv6 or later.
3160 else if (Opc == ARM::tMOVr && isThumbOne() &&
3161 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3162 isARMLowRegister(Inst.getOperand(1).getReg()))
3163 return Match_RequiresV6;
3164 return Match_Success;
3168 MatchAndEmitInstruction(SMLoc IDLoc,
3169 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3173 unsigned MatchResult;
3174 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3175 switch (MatchResult) {
3178 // Context sensitive operand constraints aren't handled by the matcher,
3179 // so check them here.
3180 if (validateInstruction(Inst, Operands))
3183 // Some instructions need post-processing to, for example, tweak which
3184 // encoding is selected.
3185 processInstruction(Inst, Operands);
3187 Out.EmitInstruction(Inst);
3189 case Match_MissingFeature:
3190 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3192 case Match_InvalidOperand: {
3193 SMLoc ErrorLoc = IDLoc;
3194 if (ErrorInfo != ~0U) {
3195 if (ErrorInfo >= Operands.size())
3196 return Error(IDLoc, "too few operands for instruction");
3198 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3199 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3202 return Error(ErrorLoc, "invalid operand for instruction");
3204 case Match_MnemonicFail:
3205 return Error(IDLoc, "invalid instruction");
3206 case Match_ConversionFail:
3207 return Error(IDLoc, "unable to convert operands to instruction");
3208 case Match_RequiresITBlock:
3209 return Error(IDLoc, "instruction only valid inside IT block");
3210 case Match_RequiresV6:
3211 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3212 case Match_RequiresThumb2:
3213 return Error(IDLoc, "instruction variant requires Thumb2");
3216 llvm_unreachable("Implement any new match types added!");
3220 /// parseDirective parses the arm specific directives
3221 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3222 StringRef IDVal = DirectiveID.getIdentifier();
3223 if (IDVal == ".word")
3224 return parseDirectiveWord(4, DirectiveID.getLoc());
3225 else if (IDVal == ".thumb")
3226 return parseDirectiveThumb(DirectiveID.getLoc());
3227 else if (IDVal == ".thumb_func")
3228 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3229 else if (IDVal == ".code")
3230 return parseDirectiveCode(DirectiveID.getLoc());
3231 else if (IDVal == ".syntax")
3232 return parseDirectiveSyntax(DirectiveID.getLoc());
3236 /// parseDirectiveWord
3237 /// ::= .word [ expression (, expression)* ]
3238 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3239 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3241 const MCExpr *Value;
3242 if (getParser().ParseExpression(Value))
3245 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3247 if (getLexer().is(AsmToken::EndOfStatement))
3250 // FIXME: Improve diagnostic.
3251 if (getLexer().isNot(AsmToken::Comma))
3252 return Error(L, "unexpected token in directive");
3261 /// parseDirectiveThumb
3263 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3264 if (getLexer().isNot(AsmToken::EndOfStatement))
3265 return Error(L, "unexpected token in directive");
3268 // TODO: set thumb mode
3269 // TODO: tell the MC streamer the mode
3270 // getParser().getStreamer().Emit???();
3274 /// parseDirectiveThumbFunc
3275 /// ::= .thumbfunc symbol_name
3276 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3277 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3278 bool isMachO = MAI.hasSubsectionsViaSymbols();
3281 // Darwin asm has function name after .thumb_func direction
3284 const AsmToken &Tok = Parser.getTok();
3285 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3286 return Error(L, "unexpected token in .thumb_func directive");
3287 Name = Tok.getString();
3288 Parser.Lex(); // Consume the identifier token.
3291 if (getLexer().isNot(AsmToken::EndOfStatement))
3292 return Error(L, "unexpected token in directive");
3295 // FIXME: assuming function name will be the line following .thumb_func
3297 Name = Parser.getTok().getString();
3300 // Mark symbol as a thumb symbol.
3301 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3302 getParser().getStreamer().EmitThumbFunc(Func);
3306 /// parseDirectiveSyntax
3307 /// ::= .syntax unified | divided
3308 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3309 const AsmToken &Tok = Parser.getTok();
3310 if (Tok.isNot(AsmToken::Identifier))
3311 return Error(L, "unexpected token in .syntax directive");
3312 StringRef Mode = Tok.getString();
3313 if (Mode == "unified" || Mode == "UNIFIED")
3315 else if (Mode == "divided" || Mode == "DIVIDED")
3316 return Error(L, "'.syntax divided' arm asssembly not supported");
3318 return Error(L, "unrecognized syntax mode in .syntax directive");
3320 if (getLexer().isNot(AsmToken::EndOfStatement))
3321 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3324 // TODO tell the MC streamer the mode
3325 // getParser().getStreamer().Emit???();
3329 /// parseDirectiveCode
3330 /// ::= .code 16 | 32
3331 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3332 const AsmToken &Tok = Parser.getTok();
3333 if (Tok.isNot(AsmToken::Integer))
3334 return Error(L, "unexpected token in .code directive");
3335 int64_t Val = Parser.getTok().getIntVal();
3341 return Error(L, "invalid operand to .code directive");
3343 if (getLexer().isNot(AsmToken::EndOfStatement))
3344 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3350 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3355 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3362 extern "C" void LLVMInitializeARMAsmLexer();
3364 /// Force static initialization.
3365 extern "C" void LLVMInitializeARMAsmParser() {
3366 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3367 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3368 LLVMInitializeARMAsmLexer();
3371 #define GET_REGISTER_MATCHER
3372 #define GET_MATCHER_IMPLEMENTATION
3373 #include "ARMGenAsmMatcher.inc"