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 isMemThumbRIs2() const {
632 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
633 !isARMLowRegister(Mem.BaseRegNum))
635 // Immediate offset, multiple of 4 in range [0, 62].
636 if (!Mem.OffsetImm) return true;
637 int64_t Val = Mem.OffsetImm->getValue();
638 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
640 bool isMemThumbRIs1() const {
641 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
642 !isARMLowRegister(Mem.BaseRegNum))
644 // Immediate offset in range [0, 31].
645 if (!Mem.OffsetImm) return true;
646 int64_t Val = Mem.OffsetImm->getValue();
647 return Val >= 0 && Val <= 31;
649 bool isMemThumbSPI() const {
650 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
652 // Immediate offset, multiple of 4 in range [0, 1020].
653 if (!Mem.OffsetImm) return true;
654 int64_t Val = Mem.OffsetImm->getValue();
655 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
657 bool isMemImm8Offset() const {
658 if (Kind != Memory || Mem.OffsetRegNum != 0)
660 // Immediate offset in range [-255, 255].
661 if (!Mem.OffsetImm) return true;
662 int64_t Val = Mem.OffsetImm->getValue();
663 return Val > -256 && Val < 256;
665 bool isMemImm12Offset() const {
666 // If we have an immediate that's not a constant, treat it as a label
667 // reference needing a fixup. If it is a constant, it's something else
669 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
672 if (Kind != Memory || Mem.OffsetRegNum != 0)
674 // Immediate offset in range [-4095, 4095].
675 if (!Mem.OffsetImm) return true;
676 int64_t Val = Mem.OffsetImm->getValue();
677 return Val > -4096 && Val < 4096;
679 bool isPostIdxImm8() const {
680 if (Kind != Immediate)
682 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
683 if (!CE) return false;
684 int64_t Val = CE->getValue();
685 return Val > -256 && Val < 256;
688 bool isMSRMask() const { return Kind == MSRMask; }
689 bool isProcIFlags() const { return Kind == ProcIFlags; }
691 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
692 // Add as immediates when possible. Null MCExpr = 0.
694 Inst.addOperand(MCOperand::CreateImm(0));
695 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
696 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
698 Inst.addOperand(MCOperand::CreateExpr(Expr));
701 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
702 assert(N == 2 && "Invalid number of operands!");
703 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
704 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
705 Inst.addOperand(MCOperand::CreateReg(RegNum));
708 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
709 assert(N == 1 && "Invalid number of operands!");
710 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
713 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
714 assert(N == 1 && "Invalid number of operands!");
715 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
718 void addCCOutOperands(MCInst &Inst, unsigned N) const {
719 assert(N == 1 && "Invalid number of operands!");
720 Inst.addOperand(MCOperand::CreateReg(getReg()));
723 void addRegOperands(MCInst &Inst, unsigned N) const {
724 assert(N == 1 && "Invalid number of operands!");
725 Inst.addOperand(MCOperand::CreateReg(getReg()));
728 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
729 assert(N == 3 && "Invalid number of operands!");
730 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
731 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
732 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
733 Inst.addOperand(MCOperand::CreateImm(
734 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
737 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
738 assert(N == 2 && "Invalid number of operands!");
739 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
740 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
741 Inst.addOperand(MCOperand::CreateImm(
742 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
746 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
747 assert(N == 1 && "Invalid number of operands!");
748 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
752 void addRegListOperands(MCInst &Inst, unsigned N) const {
753 assert(N == 1 && "Invalid number of operands!");
754 const SmallVectorImpl<unsigned> &RegList = getRegList();
755 for (SmallVectorImpl<unsigned>::const_iterator
756 I = RegList.begin(), E = RegList.end(); I != E; ++I)
757 Inst.addOperand(MCOperand::CreateReg(*I));
760 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
761 addRegListOperands(Inst, N);
764 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
765 addRegListOperands(Inst, N);
768 void addRotImmOperands(MCInst &Inst, unsigned N) const {
769 assert(N == 1 && "Invalid number of operands!");
770 // Encoded as val>>3. The printer handles display as 8, 16, 24.
771 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
774 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
775 assert(N == 1 && "Invalid number of operands!");
776 // Munge the lsb/width into a bitfield mask.
777 unsigned lsb = Bitfield.LSB;
778 unsigned width = Bitfield.Width;
779 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
780 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
781 (32 - (lsb + width)));
782 Inst.addOperand(MCOperand::CreateImm(Mask));
785 void addImmOperands(MCInst &Inst, unsigned N) const {
786 assert(N == 1 && "Invalid number of operands!");
787 addExpr(Inst, getImm());
790 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
791 assert(N == 1 && "Invalid number of operands!");
792 addExpr(Inst, getImm());
795 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
796 assert(N == 1 && "Invalid number of operands!");
797 addExpr(Inst, getImm());
800 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
801 assert(N == 1 && "Invalid number of operands!");
802 addExpr(Inst, getImm());
805 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
806 assert(N == 1 && "Invalid number of operands!");
807 addExpr(Inst, getImm());
810 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
811 assert(N == 1 && "Invalid number of operands!");
812 // The constant encodes as the immediate-1, and we store in the instruction
813 // the bits as encoded, so subtract off one here.
814 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
815 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
818 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
819 assert(N == 1 && "Invalid number of operands!");
820 // The constant encodes as the immediate-1, and we store in the instruction
821 // the bits as encoded, so subtract off one here.
822 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
823 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
826 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
827 assert(N == 1 && "Invalid number of operands!");
828 addExpr(Inst, getImm());
831 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
832 assert(N == 1 && "Invalid number of operands!");
833 addExpr(Inst, getImm());
836 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
837 assert(N == 1 && "Invalid number of operands!");
838 addExpr(Inst, getImm());
841 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
842 assert(N == 1 && "Invalid number of operands!");
843 // The constant encodes as the immediate, except for 32, which encodes as
845 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
846 unsigned Imm = CE->getValue();
847 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
850 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
851 assert(N == 1 && "Invalid number of operands!");
852 addExpr(Inst, getImm());
855 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
856 assert(N == 1 && "Invalid number of operands!");
857 // An ASR value of 32 encodes as 0, so that's how we want to add it to
858 // the instruction as well.
859 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
860 int Val = CE->getValue();
861 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
864 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
865 assert(N == 1 && "Invalid number of operands!");
866 addExpr(Inst, getImm());
869 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
870 assert(N == 1 && "Invalid number of operands!");
871 addExpr(Inst, getImm());
874 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
875 assert(N == 1 && "Invalid number of operands!");
876 addExpr(Inst, getImm());
879 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
880 assert(N == 1 && "Invalid number of operands!");
881 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
884 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
885 assert(N == 1 && "Invalid number of operands!");
886 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
889 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
890 assert(N == 3 && "Invalid number of operands!");
891 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
892 if (!Mem.OffsetRegNum) {
893 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
894 // Special case for #-0
895 if (Val == INT32_MIN) Val = 0;
896 if (Val < 0) Val = -Val;
897 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
899 // For register offset, we encode the shift type and negation flag
901 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
902 Mem.ShiftImm, Mem.ShiftType);
904 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
905 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
906 Inst.addOperand(MCOperand::CreateImm(Val));
909 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
910 assert(N == 2 && "Invalid number of operands!");
911 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
912 assert(CE && "non-constant AM2OffsetImm operand!");
913 int32_t Val = CE->getValue();
914 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
915 // Special case for #-0
916 if (Val == INT32_MIN) Val = 0;
917 if (Val < 0) Val = -Val;
918 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
919 Inst.addOperand(MCOperand::CreateReg(0));
920 Inst.addOperand(MCOperand::CreateImm(Val));
923 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
924 assert(N == 3 && "Invalid number of operands!");
925 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
926 if (!Mem.OffsetRegNum) {
927 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
928 // Special case for #-0
929 if (Val == INT32_MIN) Val = 0;
930 if (Val < 0) Val = -Val;
931 Val = ARM_AM::getAM3Opc(AddSub, Val);
933 // For register offset, we encode the shift type and negation flag
935 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
937 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
938 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
939 Inst.addOperand(MCOperand::CreateImm(Val));
942 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
943 assert(N == 2 && "Invalid number of operands!");
944 if (Kind == PostIndexRegister) {
946 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
947 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
948 Inst.addOperand(MCOperand::CreateImm(Val));
953 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
954 int32_t Val = CE->getValue();
955 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
956 // Special case for #-0
957 if (Val == INT32_MIN) Val = 0;
958 if (Val < 0) Val = -Val;
959 Val = ARM_AM::getAM3Opc(AddSub, Val);
960 Inst.addOperand(MCOperand::CreateReg(0));
961 Inst.addOperand(MCOperand::CreateImm(Val));
964 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
965 assert(N == 2 && "Invalid number of operands!");
966 // The lower two bits are always zero and as such are not encoded.
967 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
968 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
969 // Special case for #-0
970 if (Val == INT32_MIN) Val = 0;
971 if (Val < 0) Val = -Val;
972 Val = ARM_AM::getAM5Opc(AddSub, Val);
973 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
974 Inst.addOperand(MCOperand::CreateImm(Val));
977 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
978 assert(N == 2 && "Invalid number of operands!");
979 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
980 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
981 Inst.addOperand(MCOperand::CreateImm(Val));
984 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
985 assert(N == 2 && "Invalid number of operands!");
986 // If this is an immediate, it's a label reference.
987 if (Kind == Immediate) {
988 addExpr(Inst, getImm());
989 Inst.addOperand(MCOperand::CreateImm(0));
993 // Otherwise, it's a normal memory reg+offset.
994 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
995 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
996 Inst.addOperand(MCOperand::CreateImm(Val));
999 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1000 assert(N == 3 && "Invalid number of operands!");
1001 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1002 Mem.ShiftImm, Mem.ShiftType);
1003 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1004 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1005 Inst.addOperand(MCOperand::CreateImm(Val));
1008 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1009 assert(N == 2 && "Invalid number of operands!");
1010 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1011 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1014 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1015 assert(N == 2 && "Invalid number of operands!");
1016 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1017 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1018 Inst.addOperand(MCOperand::CreateImm(Val));
1021 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1022 assert(N == 2 && "Invalid number of operands!");
1023 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 2) : 0;
1024 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1025 Inst.addOperand(MCOperand::CreateImm(Val));
1028 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1029 assert(N == 2 && "Invalid number of operands!");
1030 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue()) : 0;
1031 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1032 Inst.addOperand(MCOperand::CreateImm(Val));
1035 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1036 assert(N == 2 && "Invalid number of operands!");
1037 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1038 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1039 Inst.addOperand(MCOperand::CreateImm(Val));
1042 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1043 assert(N == 1 && "Invalid number of operands!");
1044 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1045 assert(CE && "non-constant post-idx-imm8 operand!");
1046 int Imm = CE->getValue();
1047 bool isAdd = Imm >= 0;
1048 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1049 Inst.addOperand(MCOperand::CreateImm(Imm));
1052 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1053 assert(N == 2 && "Invalid number of operands!");
1054 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1055 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1058 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1059 assert(N == 2 && "Invalid number of operands!");
1060 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1061 // The sign, shift type, and shift amount are encoded in a single operand
1062 // using the AM2 encoding helpers.
1063 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1064 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1065 PostIdxReg.ShiftTy);
1066 Inst.addOperand(MCOperand::CreateImm(Imm));
1069 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1070 assert(N == 1 && "Invalid number of operands!");
1071 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1074 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1075 assert(N == 1 && "Invalid number of operands!");
1076 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1079 virtual void print(raw_ostream &OS) const;
1081 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1082 ARMOperand *Op = new ARMOperand(CondCode);
1089 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1090 ARMOperand *Op = new ARMOperand(CoprocNum);
1091 Op->Cop.Val = CopVal;
1097 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1098 ARMOperand *Op = new ARMOperand(CoprocReg);
1099 Op->Cop.Val = CopVal;
1105 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1106 ARMOperand *Op = new ARMOperand(CCOut);
1107 Op->Reg.RegNum = RegNum;
1113 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1114 ARMOperand *Op = new ARMOperand(Token);
1115 Op->Tok.Data = Str.data();
1116 Op->Tok.Length = Str.size();
1122 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1123 ARMOperand *Op = new ARMOperand(Register);
1124 Op->Reg.RegNum = RegNum;
1130 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1135 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1136 Op->RegShiftedReg.ShiftTy = ShTy;
1137 Op->RegShiftedReg.SrcReg = SrcReg;
1138 Op->RegShiftedReg.ShiftReg = ShiftReg;
1139 Op->RegShiftedReg.ShiftImm = ShiftImm;
1145 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1149 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1150 Op->RegShiftedImm.ShiftTy = ShTy;
1151 Op->RegShiftedImm.SrcReg = SrcReg;
1152 Op->RegShiftedImm.ShiftImm = ShiftImm;
1158 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1160 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1161 Op->ShifterImm.isASR = isASR;
1162 Op->ShifterImm.Imm = Imm;
1168 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1169 ARMOperand *Op = new ARMOperand(RotateImmediate);
1170 Op->RotImm.Imm = Imm;
1176 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1178 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1179 Op->Bitfield.LSB = LSB;
1180 Op->Bitfield.Width = Width;
1187 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1188 SMLoc StartLoc, SMLoc EndLoc) {
1189 KindTy Kind = RegisterList;
1191 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1192 contains(Regs.front().first))
1193 Kind = DPRRegisterList;
1194 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1195 contains(Regs.front().first))
1196 Kind = SPRRegisterList;
1198 ARMOperand *Op = new ARMOperand(Kind);
1199 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1200 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1201 Op->Registers.push_back(I->first);
1202 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1203 Op->StartLoc = StartLoc;
1204 Op->EndLoc = EndLoc;
1208 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1209 ARMOperand *Op = new ARMOperand(Immediate);
1216 static ARMOperand *CreateMem(unsigned BaseRegNum,
1217 const MCConstantExpr *OffsetImm,
1218 unsigned OffsetRegNum,
1219 ARM_AM::ShiftOpc ShiftType,
1223 ARMOperand *Op = new ARMOperand(Memory);
1224 Op->Mem.BaseRegNum = BaseRegNum;
1225 Op->Mem.OffsetImm = OffsetImm;
1226 Op->Mem.OffsetRegNum = OffsetRegNum;
1227 Op->Mem.ShiftType = ShiftType;
1228 Op->Mem.ShiftImm = ShiftImm;
1229 Op->Mem.isNegative = isNegative;
1235 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1236 ARM_AM::ShiftOpc ShiftTy,
1239 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1240 Op->PostIdxReg.RegNum = RegNum;
1241 Op->PostIdxReg.isAdd = isAdd;
1242 Op->PostIdxReg.ShiftTy = ShiftTy;
1243 Op->PostIdxReg.ShiftImm = ShiftImm;
1249 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1250 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1251 Op->MBOpt.Val = Opt;
1257 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1258 ARMOperand *Op = new ARMOperand(ProcIFlags);
1259 Op->IFlags.Val = IFlags;
1265 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1266 ARMOperand *Op = new ARMOperand(MSRMask);
1267 Op->MMask.Val = MMask;
1274 } // end anonymous namespace.
1276 void ARMOperand::print(raw_ostream &OS) const {
1279 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1282 OS << "<ccout " << getReg() << ">";
1285 OS << "<coprocessor number: " << getCoproc() << ">";
1288 OS << "<coprocessor register: " << getCoproc() << ">";
1291 OS << "<mask: " << getMSRMask() << ">";
1294 getImm()->print(OS);
1297 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1301 << " base:" << Mem.BaseRegNum;
1304 case PostIndexRegister:
1305 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1306 << PostIdxReg.RegNum;
1307 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1308 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1309 << PostIdxReg.ShiftImm;
1313 OS << "<ARM_PROC::";
1314 unsigned IFlags = getProcIFlags();
1315 for (int i=2; i >= 0; --i)
1316 if (IFlags & (1 << i))
1317 OS << ARM_PROC::IFlagsToString(1 << i);
1322 OS << "<register " << getReg() << ">";
1324 case ShifterImmediate:
1325 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1326 << " #" << ShifterImm.Imm << ">";
1328 case ShiftedRegister:
1329 OS << "<so_reg_reg "
1330 << RegShiftedReg.SrcReg
1331 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1332 << ", " << RegShiftedReg.ShiftReg << ", "
1333 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1336 case ShiftedImmediate:
1337 OS << "<so_reg_imm "
1338 << RegShiftedImm.SrcReg
1339 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1340 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1343 case RotateImmediate:
1344 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1346 case BitfieldDescriptor:
1347 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1348 << ", width: " << Bitfield.Width << ">";
1351 case DPRRegisterList:
1352 case SPRRegisterList: {
1353 OS << "<register_list ";
1355 const SmallVectorImpl<unsigned> &RegList = getRegList();
1356 for (SmallVectorImpl<unsigned>::const_iterator
1357 I = RegList.begin(), E = RegList.end(); I != E; ) {
1359 if (++I < E) OS << ", ";
1366 OS << "'" << getToken() << "'";
1371 /// @name Auto-generated Match Functions
1374 static unsigned MatchRegisterName(StringRef Name);
1378 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1379 SMLoc &StartLoc, SMLoc &EndLoc) {
1380 RegNo = tryParseRegister();
1382 return (RegNo == (unsigned)-1);
1385 /// Try to parse a register name. The token must be an Identifier when called,
1386 /// and if it is a register name the token is eaten and the register number is
1387 /// returned. Otherwise return -1.
1389 int ARMAsmParser::tryParseRegister() {
1390 const AsmToken &Tok = Parser.getTok();
1391 if (Tok.isNot(AsmToken::Identifier)) return -1;
1393 // FIXME: Validate register for the current architecture; we have to do
1394 // validation later, so maybe there is no need for this here.
1395 std::string upperCase = Tok.getString().str();
1396 std::string lowerCase = LowercaseString(upperCase);
1397 unsigned RegNum = MatchRegisterName(lowerCase);
1399 RegNum = StringSwitch<unsigned>(lowerCase)
1400 .Case("r13", ARM::SP)
1401 .Case("r14", ARM::LR)
1402 .Case("r15", ARM::PC)
1403 .Case("ip", ARM::R12)
1406 if (!RegNum) return -1;
1408 Parser.Lex(); // Eat identifier token.
1412 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1413 // If a recoverable error occurs, return 1. If an irrecoverable error
1414 // occurs, return -1. An irrecoverable error is one where tokens have been
1415 // consumed in the process of trying to parse the shifter (i.e., when it is
1416 // indeed a shifter operand, but malformed).
1417 int ARMAsmParser::tryParseShiftRegister(
1418 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1419 SMLoc S = Parser.getTok().getLoc();
1420 const AsmToken &Tok = Parser.getTok();
1421 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1423 std::string upperCase = Tok.getString().str();
1424 std::string lowerCase = LowercaseString(upperCase);
1425 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1426 .Case("lsl", ARM_AM::lsl)
1427 .Case("lsr", ARM_AM::lsr)
1428 .Case("asr", ARM_AM::asr)
1429 .Case("ror", ARM_AM::ror)
1430 .Case("rrx", ARM_AM::rrx)
1431 .Default(ARM_AM::no_shift);
1433 if (ShiftTy == ARM_AM::no_shift)
1436 Parser.Lex(); // Eat the operator.
1438 // The source register for the shift has already been added to the
1439 // operand list, so we need to pop it off and combine it into the shifted
1440 // register operand instead.
1441 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1442 if (!PrevOp->isReg())
1443 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1444 int SrcReg = PrevOp->getReg();
1447 if (ShiftTy == ARM_AM::rrx) {
1448 // RRX Doesn't have an explicit shift amount. The encoder expects
1449 // the shift register to be the same as the source register. Seems odd,
1453 // Figure out if this is shifted by a constant or a register (for non-RRX).
1454 if (Parser.getTok().is(AsmToken::Hash)) {
1455 Parser.Lex(); // Eat hash.
1456 SMLoc ImmLoc = Parser.getTok().getLoc();
1457 const MCExpr *ShiftExpr = 0;
1458 if (getParser().ParseExpression(ShiftExpr)) {
1459 Error(ImmLoc, "invalid immediate shift value");
1462 // The expression must be evaluatable as an immediate.
1463 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1465 Error(ImmLoc, "invalid immediate shift value");
1468 // Range check the immediate.
1469 // lsl, ror: 0 <= imm <= 31
1470 // lsr, asr: 0 <= imm <= 32
1471 Imm = CE->getValue();
1473 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1474 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1475 Error(ImmLoc, "immediate shift value out of range");
1478 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1479 ShiftReg = tryParseRegister();
1480 SMLoc L = Parser.getTok().getLoc();
1481 if (ShiftReg == -1) {
1482 Error (L, "expected immediate or register in shift operand");
1486 Error (Parser.getTok().getLoc(),
1487 "expected immediate or register in shift operand");
1492 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1493 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1495 S, Parser.getTok().getLoc()));
1497 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1498 S, Parser.getTok().getLoc()));
1504 /// Try to parse a register name. The token must be an Identifier when called.
1505 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1506 /// if there is a "writeback". 'true' if it's not a register.
1508 /// TODO this is likely to change to allow different register types and or to
1509 /// parse for a specific register type.
1511 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1512 SMLoc S = Parser.getTok().getLoc();
1513 int RegNo = tryParseRegister();
1517 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1519 const AsmToken &ExclaimTok = Parser.getTok();
1520 if (ExclaimTok.is(AsmToken::Exclaim)) {
1521 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1522 ExclaimTok.getLoc()));
1523 Parser.Lex(); // Eat exclaim token
1529 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1530 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1532 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1533 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1535 switch (Name.size()) {
1538 if (Name[0] != CoprocOp)
1555 if (Name[0] != CoprocOp || Name[1] != '1')
1559 case '0': return 10;
1560 case '1': return 11;
1561 case '2': return 12;
1562 case '3': return 13;
1563 case '4': return 14;
1564 case '5': return 15;
1572 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1573 /// token must be an Identifier when called, and if it is a coprocessor
1574 /// number, the token is eaten and the operand is added to the operand list.
1575 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1576 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1577 SMLoc S = Parser.getTok().getLoc();
1578 const AsmToken &Tok = Parser.getTok();
1579 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1581 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1583 return MatchOperand_NoMatch;
1585 Parser.Lex(); // Eat identifier token.
1586 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1587 return MatchOperand_Success;
1590 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1591 /// token must be an Identifier when called, and if it is a coprocessor
1592 /// number, the token is eaten and the operand is added to the operand list.
1593 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1594 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1595 SMLoc S = Parser.getTok().getLoc();
1596 const AsmToken &Tok = Parser.getTok();
1597 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1599 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1601 return MatchOperand_NoMatch;
1603 Parser.Lex(); // Eat identifier token.
1604 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1605 return MatchOperand_Success;
1608 /// Parse a register list, return it if successful else return null. The first
1609 /// token must be a '{' when called.
1611 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1612 assert(Parser.getTok().is(AsmToken::LCurly) &&
1613 "Token is not a Left Curly Brace");
1614 SMLoc S = Parser.getTok().getLoc();
1616 // Read the rest of the registers in the list.
1617 unsigned PrevRegNum = 0;
1618 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1621 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1622 Parser.Lex(); // Eat non-identifier token.
1624 const AsmToken &RegTok = Parser.getTok();
1625 SMLoc RegLoc = RegTok.getLoc();
1626 if (RegTok.isNot(AsmToken::Identifier)) {
1627 Error(RegLoc, "register expected");
1631 int RegNum = tryParseRegister();
1633 Error(RegLoc, "register expected");
1638 int Reg = PrevRegNum;
1641 Registers.push_back(std::make_pair(Reg, RegLoc));
1642 } while (Reg != RegNum);
1644 Registers.push_back(std::make_pair(RegNum, RegLoc));
1647 PrevRegNum = RegNum;
1648 } while (Parser.getTok().is(AsmToken::Comma) ||
1649 Parser.getTok().is(AsmToken::Minus));
1651 // Process the right curly brace of the list.
1652 const AsmToken &RCurlyTok = Parser.getTok();
1653 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1654 Error(RCurlyTok.getLoc(), "'}' expected");
1658 SMLoc E = RCurlyTok.getLoc();
1659 Parser.Lex(); // Eat right curly brace token.
1661 // Verify the register list.
1662 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1663 RI = Registers.begin(), RE = Registers.end();
1665 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1666 bool EmittedWarning = false;
1668 DenseMap<unsigned, bool> RegMap;
1669 RegMap[HighRegNum] = true;
1671 for (++RI; RI != RE; ++RI) {
1672 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1673 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1676 Error(RegInfo.second, "register duplicated in register list");
1680 if (!EmittedWarning && Reg < HighRegNum)
1681 Warning(RegInfo.second,
1682 "register not in ascending order in register list");
1685 HighRegNum = std::max(Reg, HighRegNum);
1688 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1692 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1693 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1694 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1695 SMLoc S = Parser.getTok().getLoc();
1696 const AsmToken &Tok = Parser.getTok();
1697 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1698 StringRef OptStr = Tok.getString();
1700 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1701 .Case("sy", ARM_MB::SY)
1702 .Case("st", ARM_MB::ST)
1703 .Case("sh", ARM_MB::ISH)
1704 .Case("ish", ARM_MB::ISH)
1705 .Case("shst", ARM_MB::ISHST)
1706 .Case("ishst", ARM_MB::ISHST)
1707 .Case("nsh", ARM_MB::NSH)
1708 .Case("un", ARM_MB::NSH)
1709 .Case("nshst", ARM_MB::NSHST)
1710 .Case("unst", ARM_MB::NSHST)
1711 .Case("osh", ARM_MB::OSH)
1712 .Case("oshst", ARM_MB::OSHST)
1716 return MatchOperand_NoMatch;
1718 Parser.Lex(); // Eat identifier token.
1719 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1720 return MatchOperand_Success;
1723 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1724 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1725 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1726 SMLoc S = Parser.getTok().getLoc();
1727 const AsmToken &Tok = Parser.getTok();
1728 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1729 StringRef IFlagsStr = Tok.getString();
1731 unsigned IFlags = 0;
1732 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1733 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1734 .Case("a", ARM_PROC::A)
1735 .Case("i", ARM_PROC::I)
1736 .Case("f", ARM_PROC::F)
1739 // If some specific iflag is already set, it means that some letter is
1740 // present more than once, this is not acceptable.
1741 if (Flag == ~0U || (IFlags & Flag))
1742 return MatchOperand_NoMatch;
1747 Parser.Lex(); // Eat identifier token.
1748 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1749 return MatchOperand_Success;
1752 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1753 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1754 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1755 SMLoc S = Parser.getTok().getLoc();
1756 const AsmToken &Tok = Parser.getTok();
1757 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1758 StringRef Mask = Tok.getString();
1760 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1761 size_t Start = 0, Next = Mask.find('_');
1762 StringRef Flags = "";
1763 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1764 if (Next != StringRef::npos)
1765 Flags = Mask.slice(Next+1, Mask.size());
1767 // FlagsVal contains the complete mask:
1769 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1770 unsigned FlagsVal = 0;
1772 if (SpecReg == "apsr") {
1773 FlagsVal = StringSwitch<unsigned>(Flags)
1774 .Case("nzcvq", 0x8) // same as CPSR_f
1775 .Case("g", 0x4) // same as CPSR_s
1776 .Case("nzcvqg", 0xc) // same as CPSR_fs
1779 if (FlagsVal == ~0U) {
1781 return MatchOperand_NoMatch;
1783 FlagsVal = 0; // No flag
1785 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1786 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1788 for (int i = 0, e = Flags.size(); i != e; ++i) {
1789 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1796 // If some specific flag is already set, it means that some letter is
1797 // present more than once, this is not acceptable.
1798 if (FlagsVal == ~0U || (FlagsVal & Flag))
1799 return MatchOperand_NoMatch;
1802 } else // No match for special register.
1803 return MatchOperand_NoMatch;
1805 // Special register without flags are equivalent to "fc" flags.
1809 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1810 if (SpecReg == "spsr")
1813 Parser.Lex(); // Eat identifier token.
1814 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1815 return MatchOperand_Success;
1818 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1819 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1820 int Low, int High) {
1821 const AsmToken &Tok = Parser.getTok();
1822 if (Tok.isNot(AsmToken::Identifier)) {
1823 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1824 return MatchOperand_ParseFail;
1826 StringRef ShiftName = Tok.getString();
1827 std::string LowerOp = LowercaseString(Op);
1828 std::string UpperOp = UppercaseString(Op);
1829 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1830 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1831 return MatchOperand_ParseFail;
1833 Parser.Lex(); // Eat shift type token.
1835 // There must be a '#' and a shift amount.
1836 if (Parser.getTok().isNot(AsmToken::Hash)) {
1837 Error(Parser.getTok().getLoc(), "'#' expected");
1838 return MatchOperand_ParseFail;
1840 Parser.Lex(); // Eat hash token.
1842 const MCExpr *ShiftAmount;
1843 SMLoc Loc = Parser.getTok().getLoc();
1844 if (getParser().ParseExpression(ShiftAmount)) {
1845 Error(Loc, "illegal expression");
1846 return MatchOperand_ParseFail;
1848 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1850 Error(Loc, "constant expression expected");
1851 return MatchOperand_ParseFail;
1853 int Val = CE->getValue();
1854 if (Val < Low || Val > High) {
1855 Error(Loc, "immediate value out of range");
1856 return MatchOperand_ParseFail;
1859 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1861 return MatchOperand_Success;
1864 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1865 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1866 const AsmToken &Tok = Parser.getTok();
1867 SMLoc S = Tok.getLoc();
1868 if (Tok.isNot(AsmToken::Identifier)) {
1869 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1870 return MatchOperand_ParseFail;
1872 int Val = StringSwitch<int>(Tok.getString())
1876 Parser.Lex(); // Eat the token.
1879 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1880 return MatchOperand_ParseFail;
1882 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1884 S, Parser.getTok().getLoc()));
1885 return MatchOperand_Success;
1888 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1889 /// instructions. Legal values are:
1890 /// lsl #n 'n' in [0,31]
1891 /// asr #n 'n' in [1,32]
1892 /// n == 32 encoded as n == 0.
1893 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1894 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1895 const AsmToken &Tok = Parser.getTok();
1896 SMLoc S = Tok.getLoc();
1897 if (Tok.isNot(AsmToken::Identifier)) {
1898 Error(S, "shift operator 'asr' or 'lsl' expected");
1899 return MatchOperand_ParseFail;
1901 StringRef ShiftName = Tok.getString();
1903 if (ShiftName == "lsl" || ShiftName == "LSL")
1905 else if (ShiftName == "asr" || ShiftName == "ASR")
1908 Error(S, "shift operator 'asr' or 'lsl' expected");
1909 return MatchOperand_ParseFail;
1911 Parser.Lex(); // Eat the operator.
1913 // A '#' and a shift amount.
1914 if (Parser.getTok().isNot(AsmToken::Hash)) {
1915 Error(Parser.getTok().getLoc(), "'#' expected");
1916 return MatchOperand_ParseFail;
1918 Parser.Lex(); // Eat hash token.
1920 const MCExpr *ShiftAmount;
1921 SMLoc E = Parser.getTok().getLoc();
1922 if (getParser().ParseExpression(ShiftAmount)) {
1923 Error(E, "malformed shift expression");
1924 return MatchOperand_ParseFail;
1926 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1928 Error(E, "shift amount must be an immediate");
1929 return MatchOperand_ParseFail;
1932 int64_t Val = CE->getValue();
1934 // Shift amount must be in [1,32]
1935 if (Val < 1 || Val > 32) {
1936 Error(E, "'asr' shift amount must be in range [1,32]");
1937 return MatchOperand_ParseFail;
1939 // asr #32 encoded as asr #0.
1940 if (Val == 32) Val = 0;
1942 // Shift amount must be in [1,32]
1943 if (Val < 0 || Val > 31) {
1944 Error(E, "'lsr' shift amount must be in range [0,31]");
1945 return MatchOperand_ParseFail;
1949 E = Parser.getTok().getLoc();
1950 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1952 return MatchOperand_Success;
1955 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1956 /// of instructions. Legal values are:
1957 /// ror #n 'n' in {0, 8, 16, 24}
1958 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1959 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1960 const AsmToken &Tok = Parser.getTok();
1961 SMLoc S = Tok.getLoc();
1962 if (Tok.isNot(AsmToken::Identifier)) {
1963 Error(S, "rotate operator 'ror' expected");
1964 return MatchOperand_ParseFail;
1966 StringRef ShiftName = Tok.getString();
1967 if (ShiftName != "ror" && ShiftName != "ROR") {
1968 Error(S, "rotate operator 'ror' expected");
1969 return MatchOperand_ParseFail;
1971 Parser.Lex(); // Eat the operator.
1973 // A '#' and a rotate amount.
1974 if (Parser.getTok().isNot(AsmToken::Hash)) {
1975 Error(Parser.getTok().getLoc(), "'#' expected");
1976 return MatchOperand_ParseFail;
1978 Parser.Lex(); // Eat hash token.
1980 const MCExpr *ShiftAmount;
1981 SMLoc E = Parser.getTok().getLoc();
1982 if (getParser().ParseExpression(ShiftAmount)) {
1983 Error(E, "malformed rotate expression");
1984 return MatchOperand_ParseFail;
1986 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1988 Error(E, "rotate amount must be an immediate");
1989 return MatchOperand_ParseFail;
1992 int64_t Val = CE->getValue();
1993 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1994 // normally, zero is represented in asm by omitting the rotate operand
1996 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1997 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1998 return MatchOperand_ParseFail;
2001 E = Parser.getTok().getLoc();
2002 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2004 return MatchOperand_Success;
2007 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2008 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2009 SMLoc S = Parser.getTok().getLoc();
2010 // The bitfield descriptor is really two operands, the LSB and the width.
2011 if (Parser.getTok().isNot(AsmToken::Hash)) {
2012 Error(Parser.getTok().getLoc(), "'#' expected");
2013 return MatchOperand_ParseFail;
2015 Parser.Lex(); // Eat hash token.
2017 const MCExpr *LSBExpr;
2018 SMLoc E = Parser.getTok().getLoc();
2019 if (getParser().ParseExpression(LSBExpr)) {
2020 Error(E, "malformed immediate expression");
2021 return MatchOperand_ParseFail;
2023 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2025 Error(E, "'lsb' operand must be an immediate");
2026 return MatchOperand_ParseFail;
2029 int64_t LSB = CE->getValue();
2030 // The LSB must be in the range [0,31]
2031 if (LSB < 0 || LSB > 31) {
2032 Error(E, "'lsb' operand must be in the range [0,31]");
2033 return MatchOperand_ParseFail;
2035 E = Parser.getTok().getLoc();
2037 // Expect another immediate operand.
2038 if (Parser.getTok().isNot(AsmToken::Comma)) {
2039 Error(Parser.getTok().getLoc(), "too few operands");
2040 return MatchOperand_ParseFail;
2042 Parser.Lex(); // Eat hash token.
2043 if (Parser.getTok().isNot(AsmToken::Hash)) {
2044 Error(Parser.getTok().getLoc(), "'#' expected");
2045 return MatchOperand_ParseFail;
2047 Parser.Lex(); // Eat hash token.
2049 const MCExpr *WidthExpr;
2050 if (getParser().ParseExpression(WidthExpr)) {
2051 Error(E, "malformed immediate expression");
2052 return MatchOperand_ParseFail;
2054 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2056 Error(E, "'width' operand must be an immediate");
2057 return MatchOperand_ParseFail;
2060 int64_t Width = CE->getValue();
2061 // The LSB must be in the range [1,32-lsb]
2062 if (Width < 1 || Width > 32 - LSB) {
2063 Error(E, "'width' operand must be in the range [1,32-lsb]");
2064 return MatchOperand_ParseFail;
2066 E = Parser.getTok().getLoc();
2068 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2070 return MatchOperand_Success;
2073 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2074 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2075 // Check for a post-index addressing register operand. Specifically:
2076 // postidx_reg := '+' register {, shift}
2077 // | '-' register {, shift}
2078 // | register {, shift}
2080 // This method must return MatchOperand_NoMatch without consuming any tokens
2081 // in the case where there is no match, as other alternatives take other
2083 AsmToken Tok = Parser.getTok();
2084 SMLoc S = Tok.getLoc();
2085 bool haveEaten = false;
2088 if (Tok.is(AsmToken::Plus)) {
2089 Parser.Lex(); // Eat the '+' token.
2091 } else if (Tok.is(AsmToken::Minus)) {
2092 Parser.Lex(); // Eat the '-' token.
2096 if (Parser.getTok().is(AsmToken::Identifier))
2097 Reg = tryParseRegister();
2100 return MatchOperand_NoMatch;
2101 Error(Parser.getTok().getLoc(), "register expected");
2102 return MatchOperand_ParseFail;
2104 SMLoc E = Parser.getTok().getLoc();
2106 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2107 unsigned ShiftImm = 0;
2108 if (Parser.getTok().is(AsmToken::Comma)) {
2109 Parser.Lex(); // Eat the ','.
2110 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2111 return MatchOperand_ParseFail;
2114 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2117 return MatchOperand_Success;
2120 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2121 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2122 // Check for a post-index addressing register operand. Specifically:
2123 // am3offset := '+' register
2130 // This method must return MatchOperand_NoMatch without consuming any tokens
2131 // in the case where there is no match, as other alternatives take other
2133 AsmToken Tok = Parser.getTok();
2134 SMLoc S = Tok.getLoc();
2136 // Do immediates first, as we always parse those if we have a '#'.
2137 if (Parser.getTok().is(AsmToken::Hash)) {
2138 Parser.Lex(); // Eat the '#'.
2139 // Explicitly look for a '-', as we need to encode negative zero
2141 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2142 const MCExpr *Offset;
2143 if (getParser().ParseExpression(Offset))
2144 return MatchOperand_ParseFail;
2145 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2147 Error(S, "constant expression expected");
2148 return MatchOperand_ParseFail;
2150 SMLoc E = Tok.getLoc();
2151 // Negative zero is encoded as the flag value INT32_MIN.
2152 int32_t Val = CE->getValue();
2153 if (isNegative && Val == 0)
2157 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2159 return MatchOperand_Success;
2163 bool haveEaten = false;
2166 if (Tok.is(AsmToken::Plus)) {
2167 Parser.Lex(); // Eat the '+' token.
2169 } else if (Tok.is(AsmToken::Minus)) {
2170 Parser.Lex(); // Eat the '-' token.
2174 if (Parser.getTok().is(AsmToken::Identifier))
2175 Reg = tryParseRegister();
2178 return MatchOperand_NoMatch;
2179 Error(Parser.getTok().getLoc(), "register expected");
2180 return MatchOperand_ParseFail;
2182 SMLoc E = Parser.getTok().getLoc();
2184 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2187 return MatchOperand_Success;
2190 /// cvtLdWriteBackRegAddrMode2 - 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 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2195 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2196 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2198 // Create a writeback register dummy placeholder.
2199 Inst.addOperand(MCOperand::CreateImm(0));
2201 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2202 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2206 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2207 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2208 /// when they refer multiple MIOperands inside a single one.
2210 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2211 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2212 // Create a writeback register dummy placeholder.
2213 Inst.addOperand(MCOperand::CreateImm(0));
2214 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2215 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2216 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2220 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2221 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2222 /// when they refer multiple MIOperands inside a single one.
2224 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2225 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2226 // Create a writeback register dummy placeholder.
2227 Inst.addOperand(MCOperand::CreateImm(0));
2228 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2229 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2230 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2234 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2235 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2236 /// when they refer multiple MIOperands inside a single one.
2238 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2239 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2240 // Create a writeback register dummy placeholder.
2241 Inst.addOperand(MCOperand::CreateImm(0));
2242 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2243 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2244 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2248 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2249 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2250 /// when they refer multiple MIOperands inside a single one.
2252 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2253 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2255 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2256 // Create a writeback register dummy placeholder.
2257 Inst.addOperand(MCOperand::CreateImm(0));
2259 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2261 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2263 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2267 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2268 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2269 /// when they refer multiple MIOperands inside a single one.
2271 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2272 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2274 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2275 // Create a writeback register dummy placeholder.
2276 Inst.addOperand(MCOperand::CreateImm(0));
2278 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2280 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2282 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2286 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2287 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2288 /// when they refer multiple MIOperands inside a single one.
2290 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2291 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2292 // Create a writeback register dummy placeholder.
2293 Inst.addOperand(MCOperand::CreateImm(0));
2295 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2297 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2299 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2301 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2305 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2306 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2307 /// when they refer multiple MIOperands inside a single one.
2309 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2310 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2311 // Create a writeback register dummy placeholder.
2312 Inst.addOperand(MCOperand::CreateImm(0));
2314 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2316 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2318 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2320 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2324 /// cvtLdrdPre - Convert parsed operands to MCInst.
2325 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2326 /// when they refer multiple MIOperands inside a single one.
2328 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2329 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2331 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2332 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2333 // Create a writeback register dummy placeholder.
2334 Inst.addOperand(MCOperand::CreateImm(0));
2336 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2338 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2342 /// cvtStrdPre - Convert parsed operands to MCInst.
2343 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2344 /// when they refer multiple MIOperands inside a single one.
2346 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2347 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2348 // Create a writeback register dummy placeholder.
2349 Inst.addOperand(MCOperand::CreateImm(0));
2351 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2352 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2354 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2356 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2360 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2361 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2362 /// when they refer multiple MIOperands inside a single one.
2364 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2365 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2366 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2367 // Create a writeback register dummy placeholder.
2368 Inst.addOperand(MCOperand::CreateImm(0));
2369 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2370 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2375 /// Parse an ARM memory expression, return false if successful else return true
2376 /// or an error. The first token must be a '[' when called.
2378 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2380 assert(Parser.getTok().is(AsmToken::LBrac) &&
2381 "Token is not a Left Bracket");
2382 S = Parser.getTok().getLoc();
2383 Parser.Lex(); // Eat left bracket token.
2385 const AsmToken &BaseRegTok = Parser.getTok();
2386 int BaseRegNum = tryParseRegister();
2387 if (BaseRegNum == -1)
2388 return Error(BaseRegTok.getLoc(), "register expected");
2390 // The next token must either be a comma or a closing bracket.
2391 const AsmToken &Tok = Parser.getTok();
2392 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2393 return Error(Tok.getLoc(), "malformed memory operand");
2395 if (Tok.is(AsmToken::RBrac)) {
2397 Parser.Lex(); // Eat right bracket token.
2399 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2405 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2406 Parser.Lex(); // Eat the comma.
2408 // If we have a '#' it's an immediate offset, else assume it's a register
2410 if (Parser.getTok().is(AsmToken::Hash)) {
2411 Parser.Lex(); // Eat the '#'.
2412 E = Parser.getTok().getLoc();
2414 // FIXME: Special case #-0 so we can correctly set the U bit.
2416 const MCExpr *Offset;
2417 if (getParser().ParseExpression(Offset))
2420 // The expression has to be a constant. Memory references with relocations
2421 // don't come through here, as they use the <label> forms of the relevant
2423 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2425 return Error (E, "constant expression expected");
2427 // Now we should have the closing ']'
2428 E = Parser.getTok().getLoc();
2429 if (Parser.getTok().isNot(AsmToken::RBrac))
2430 return Error(E, "']' expected");
2431 Parser.Lex(); // Eat right bracket token.
2433 // Don't worry about range checking the value here. That's handled by
2434 // the is*() predicates.
2435 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2436 ARM_AM::no_shift, 0, false, S,E));
2438 // If there's a pre-indexing writeback marker, '!', just add it as a token
2440 if (Parser.getTok().is(AsmToken::Exclaim)) {
2441 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2442 Parser.Lex(); // Eat the '!'.
2448 // The register offset is optionally preceded by a '+' or '-'
2449 bool isNegative = false;
2450 if (Parser.getTok().is(AsmToken::Minus)) {
2452 Parser.Lex(); // Eat the '-'.
2453 } else if (Parser.getTok().is(AsmToken::Plus)) {
2455 Parser.Lex(); // Eat the '+'.
2458 E = Parser.getTok().getLoc();
2459 int OffsetRegNum = tryParseRegister();
2460 if (OffsetRegNum == -1)
2461 return Error(E, "register expected");
2463 // If there's a shift operator, handle it.
2464 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2465 unsigned ShiftImm = 0;
2466 if (Parser.getTok().is(AsmToken::Comma)) {
2467 Parser.Lex(); // Eat the ','.
2468 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2472 // Now we should have the closing ']'
2473 E = Parser.getTok().getLoc();
2474 if (Parser.getTok().isNot(AsmToken::RBrac))
2475 return Error(E, "']' expected");
2476 Parser.Lex(); // Eat right bracket token.
2478 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2479 ShiftType, ShiftImm, isNegative,
2482 // If there's a pre-indexing writeback marker, '!', just add it as a token
2484 if (Parser.getTok().is(AsmToken::Exclaim)) {
2485 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2486 Parser.Lex(); // Eat the '!'.
2492 /// parseMemRegOffsetShift - one of these two:
2493 /// ( lsl | lsr | asr | ror ) , # shift_amount
2495 /// return true if it parses a shift otherwise it returns false.
2496 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2498 SMLoc Loc = Parser.getTok().getLoc();
2499 const AsmToken &Tok = Parser.getTok();
2500 if (Tok.isNot(AsmToken::Identifier))
2502 StringRef ShiftName = Tok.getString();
2503 if (ShiftName == "lsl" || ShiftName == "LSL")
2505 else if (ShiftName == "lsr" || ShiftName == "LSR")
2507 else if (ShiftName == "asr" || ShiftName == "ASR")
2509 else if (ShiftName == "ror" || ShiftName == "ROR")
2511 else if (ShiftName == "rrx" || ShiftName == "RRX")
2514 return Error(Loc, "illegal shift operator");
2515 Parser.Lex(); // Eat shift type token.
2517 // rrx stands alone.
2519 if (St != ARM_AM::rrx) {
2520 Loc = Parser.getTok().getLoc();
2521 // A '#' and a shift amount.
2522 const AsmToken &HashTok = Parser.getTok();
2523 if (HashTok.isNot(AsmToken::Hash))
2524 return Error(HashTok.getLoc(), "'#' expected");
2525 Parser.Lex(); // Eat hash token.
2528 if (getParser().ParseExpression(Expr))
2530 // Range check the immediate.
2531 // lsl, ror: 0 <= imm <= 31
2532 // lsr, asr: 0 <= imm <= 32
2533 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2535 return Error(Loc, "shift amount must be an immediate");
2536 int64_t Imm = CE->getValue();
2538 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2539 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2540 return Error(Loc, "immediate shift value out of range");
2547 /// Parse a arm instruction operand. For now this parses the operand regardless
2548 /// of the mnemonic.
2549 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2550 StringRef Mnemonic) {
2553 // Check if the current operand has a custom associated parser, if so, try to
2554 // custom parse the operand, or fallback to the general approach.
2555 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2556 if (ResTy == MatchOperand_Success)
2558 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2559 // there was a match, but an error occurred, in which case, just return that
2560 // the operand parsing failed.
2561 if (ResTy == MatchOperand_ParseFail)
2564 switch (getLexer().getKind()) {
2566 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2568 case AsmToken::Identifier: {
2569 if (!tryParseRegisterWithWriteBack(Operands))
2571 int Res = tryParseShiftRegister(Operands);
2572 if (Res == 0) // success
2574 else if (Res == -1) // irrecoverable error
2577 // Fall though for the Identifier case that is not a register or a
2580 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2581 case AsmToken::Dot: { // . as a branch target
2582 // This was not a register so parse other operands that start with an
2583 // identifier (like labels) as expressions and create them as immediates.
2584 const MCExpr *IdVal;
2585 S = Parser.getTok().getLoc();
2586 if (getParser().ParseExpression(IdVal))
2588 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2589 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2592 case AsmToken::LBrac:
2593 return parseMemory(Operands);
2594 case AsmToken::LCurly:
2595 return parseRegisterList(Operands);
2596 case AsmToken::Hash:
2597 // #42 -> immediate.
2598 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2599 S = Parser.getTok().getLoc();
2601 const MCExpr *ImmVal;
2602 if (getParser().ParseExpression(ImmVal))
2604 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2605 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2607 case AsmToken::Colon: {
2608 // ":lower16:" and ":upper16:" expression prefixes
2609 // FIXME: Check it's an expression prefix,
2610 // e.g. (FOO - :lower16:BAR) isn't legal.
2611 ARMMCExpr::VariantKind RefKind;
2612 if (parsePrefix(RefKind))
2615 const MCExpr *SubExprVal;
2616 if (getParser().ParseExpression(SubExprVal))
2619 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2621 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2622 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2628 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2629 // :lower16: and :upper16:.
2630 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2631 RefKind = ARMMCExpr::VK_ARM_None;
2633 // :lower16: and :upper16: modifiers
2634 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2635 Parser.Lex(); // Eat ':'
2637 if (getLexer().isNot(AsmToken::Identifier)) {
2638 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2642 StringRef IDVal = Parser.getTok().getIdentifier();
2643 if (IDVal == "lower16") {
2644 RefKind = ARMMCExpr::VK_ARM_LO16;
2645 } else if (IDVal == "upper16") {
2646 RefKind = ARMMCExpr::VK_ARM_HI16;
2648 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2653 if (getLexer().isNot(AsmToken::Colon)) {
2654 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2657 Parser.Lex(); // Eat the last ':'
2662 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2663 MCSymbolRefExpr::VariantKind Variant) {
2664 // Recurse over the given expression, rebuilding it to apply the given variant
2665 // to the leftmost symbol.
2666 if (Variant == MCSymbolRefExpr::VK_None)
2669 switch (E->getKind()) {
2670 case MCExpr::Target:
2671 llvm_unreachable("Can't handle target expr yet");
2672 case MCExpr::Constant:
2673 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2675 case MCExpr::SymbolRef: {
2676 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2678 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2681 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2685 llvm_unreachable("Can't handle unary expressions yet");
2687 case MCExpr::Binary: {
2688 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2689 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2690 const MCExpr *RHS = BE->getRHS();
2694 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2698 assert(0 && "Invalid expression kind!");
2702 /// \brief Given a mnemonic, split out possible predication code and carry
2703 /// setting letters to form a canonical mnemonic and flags.
2705 // FIXME: Would be nice to autogen this.
2706 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2707 unsigned &PredicationCode,
2709 unsigned &ProcessorIMod) {
2710 PredicationCode = ARMCC::AL;
2711 CarrySetting = false;
2714 // Ignore some mnemonics we know aren't predicated forms.
2716 // FIXME: Would be nice to autogen this.
2717 if ((Mnemonic == "movs" && isThumb()) ||
2718 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2719 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2720 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2721 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2722 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2723 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2724 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2727 // First, split out any predication code. Ignore mnemonics we know aren't
2728 // predicated but do have a carry-set and so weren't caught above.
2729 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2730 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2731 Mnemonic != "umlals" && Mnemonic != "umulls") {
2732 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2733 .Case("eq", ARMCC::EQ)
2734 .Case("ne", ARMCC::NE)
2735 .Case("hs", ARMCC::HS)
2736 .Case("cs", ARMCC::HS)
2737 .Case("lo", ARMCC::LO)
2738 .Case("cc", ARMCC::LO)
2739 .Case("mi", ARMCC::MI)
2740 .Case("pl", ARMCC::PL)
2741 .Case("vs", ARMCC::VS)
2742 .Case("vc", ARMCC::VC)
2743 .Case("hi", ARMCC::HI)
2744 .Case("ls", ARMCC::LS)
2745 .Case("ge", ARMCC::GE)
2746 .Case("lt", ARMCC::LT)
2747 .Case("gt", ARMCC::GT)
2748 .Case("le", ARMCC::LE)
2749 .Case("al", ARMCC::AL)
2752 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2753 PredicationCode = CC;
2757 // Next, determine if we have a carry setting bit. We explicitly ignore all
2758 // the instructions we know end in 's'.
2759 if (Mnemonic.endswith("s") &&
2760 !(Mnemonic == "cps" || Mnemonic == "mls" ||
2761 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2762 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2763 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2764 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2765 (Mnemonic == "movs" && isThumb()))) {
2766 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2767 CarrySetting = true;
2770 // The "cps" instruction can have a interrupt mode operand which is glued into
2771 // the mnemonic. Check if this is the case, split it and parse the imod op
2772 if (Mnemonic.startswith("cps")) {
2773 // Split out any imod code.
2775 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2776 .Case("ie", ARM_PROC::IE)
2777 .Case("id", ARM_PROC::ID)
2780 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2781 ProcessorIMod = IMod;
2788 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2789 /// inclusion of carry set or predication code operands.
2791 // FIXME: It would be nice to autogen this.
2793 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2794 bool &CanAcceptPredicationCode) {
2795 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2796 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2797 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2798 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2799 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2800 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2801 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2802 Mnemonic == "eor" || Mnemonic == "smlal" ||
2803 // FIXME: We need a better way. This really confused Thumb2
2804 // parsing for 'mov'.
2805 (Mnemonic == "mov" && !isThumbOne())) {
2806 CanAcceptCarrySet = true;
2808 CanAcceptCarrySet = false;
2811 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2812 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2813 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2814 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2815 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2816 Mnemonic == "setend" ||
2817 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2818 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2820 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2821 CanAcceptPredicationCode = false;
2823 CanAcceptPredicationCode = true;
2827 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2828 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2829 CanAcceptPredicationCode = false;
2832 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
2833 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2835 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2836 // another does not. Specifically, the MOVW instruction does not. So we
2837 // special case it here and remove the defaulted (non-setting) cc_out
2838 // operand if that's the instruction we're trying to match.
2840 // We do this as post-processing of the explicit operands rather than just
2841 // conditionally adding the cc_out in the first place because we need
2842 // to check the type of the parsed immediate operand.
2843 if (Mnemonic == "mov" && Operands.size() > 4 &&
2844 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2845 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2846 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2849 // Register-register 'add' for thumb does not have a cc_out operand
2850 // when there are only two register operands.
2851 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
2852 static_cast<ARMOperand*>(Operands[3])->isReg() &&
2853 static_cast<ARMOperand*>(Operands[4])->isReg() &&
2854 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2860 /// Parse an arm instruction mnemonic followed by its operands.
2861 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2862 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2863 // Create the leading tokens for the mnemonic, split by '.' characters.
2864 size_t Start = 0, Next = Name.find('.');
2865 StringRef Mnemonic = Name.slice(Start, Next);
2867 // Split out the predication code and carry setting flag from the mnemonic.
2868 unsigned PredicationCode;
2869 unsigned ProcessorIMod;
2871 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2874 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2876 // FIXME: This is all a pretty gross hack. We should automatically handle
2877 // optional operands like this via tblgen.
2879 // Next, add the CCOut and ConditionCode operands, if needed.
2881 // For mnemonics which can ever incorporate a carry setting bit or predication
2882 // code, our matching model involves us always generating CCOut and
2883 // ConditionCode operands to match the mnemonic "as written" and then we let
2884 // the matcher deal with finding the right instruction or generating an
2885 // appropriate error.
2886 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2887 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2889 // If we had a carry-set on an instruction that can't do that, issue an
2891 if (!CanAcceptCarrySet && CarrySetting) {
2892 Parser.EatToEndOfStatement();
2893 return Error(NameLoc, "instruction '" + Mnemonic +
2894 "' can not set flags, but 's' suffix specified");
2896 // If we had a predication code on an instruction that can't do that, issue an
2898 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2899 Parser.EatToEndOfStatement();
2900 return Error(NameLoc, "instruction '" + Mnemonic +
2901 "' is not predicable, but condition code specified");
2904 // Add the carry setting operand, if necessary.
2906 // FIXME: It would be awesome if we could somehow invent a location such that
2907 // match errors on this operand would print a nice diagnostic about how the
2908 // 's' character in the mnemonic resulted in a CCOut operand.
2909 if (CanAcceptCarrySet)
2910 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2913 // Add the predication code operand, if necessary.
2914 if (CanAcceptPredicationCode) {
2915 Operands.push_back(ARMOperand::CreateCondCode(
2916 ARMCC::CondCodes(PredicationCode), NameLoc));
2919 // Add the processor imod operand, if necessary.
2920 if (ProcessorIMod) {
2921 Operands.push_back(ARMOperand::CreateImm(
2922 MCConstantExpr::Create(ProcessorIMod, getContext()),
2925 // This mnemonic can't ever accept a imod, but the user wrote
2926 // one (or misspelled another mnemonic).
2928 // FIXME: Issue a nice error.
2931 // Add the remaining tokens in the mnemonic.
2932 while (Next != StringRef::npos) {
2934 Next = Name.find('.', Start + 1);
2935 StringRef ExtraToken = Name.slice(Start, Next);
2937 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2940 // Read the remaining operands.
2941 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2942 // Read the first operand.
2943 if (parseOperand(Operands, Mnemonic)) {
2944 Parser.EatToEndOfStatement();
2948 while (getLexer().is(AsmToken::Comma)) {
2949 Parser.Lex(); // Eat the comma.
2951 // Parse and remember the operand.
2952 if (parseOperand(Operands, Mnemonic)) {
2953 Parser.EatToEndOfStatement();
2959 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2960 Parser.EatToEndOfStatement();
2961 return TokError("unexpected token in argument list");
2964 Parser.Lex(); // Consume the EndOfStatement
2966 // Some instructions, mostly Thumb, have forms for the same mnemonic that
2967 // do and don't have a cc_out optional-def operand. With some spot-checks
2968 // of the operand list, we can figure out which variant we're trying to
2969 // parse and adjust accordingly before actually matching. Reason number
2970 // #317 the table driven matcher doesn't fit well with the ARM instruction
2972 if (shouldOmitCCOutOperand(Mnemonic, Operands)) {
2973 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2974 Operands.erase(Operands.begin() + 1);
2978 // ARM mode 'blx' need special handling, as the register operand version
2979 // is predicable, but the label operand version is not. So, we can't rely
2980 // on the Mnemonic based checking to correctly figure out when to put
2981 // a CondCode operand in the list. If we're trying to match the label
2982 // version, remove the CondCode operand here.
2983 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2984 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2985 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2986 Operands.erase(Operands.begin() + 1);
2990 // The vector-compare-to-zero instructions have a literal token "#0" at
2991 // the end that comes to here as an immediate operand. Convert it to a
2992 // token to play nicely with the matcher.
2993 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
2994 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
2995 static_cast<ARMOperand*>(Operands[5])->isImm()) {
2996 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
2997 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
2998 if (CE && CE->getValue() == 0) {
2999 Operands.erase(Operands.begin() + 5);
3000 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3007 // Validate context-sensitive operand constraints.
3008 // FIXME: We would really like to be able to tablegen'erate this.
3010 validateInstruction(MCInst &Inst,
3011 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3012 switch (Inst.getOpcode()) {
3015 case ARM::LDRD_POST:
3017 // Rt2 must be Rt + 1.
3018 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3019 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3021 return Error(Operands[3]->getStartLoc(),
3022 "destination operands must be sequential");
3026 // Rt2 must be Rt + 1.
3027 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3028 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3030 return Error(Operands[3]->getStartLoc(),
3031 "source operands must be sequential");
3035 case ARM::STRD_POST:
3037 // Rt2 must be Rt + 1.
3038 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3039 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3041 return Error(Operands[3]->getStartLoc(),
3042 "source operands must be sequential");
3047 // width must be in range [1, 32-lsb]
3048 unsigned lsb = Inst.getOperand(2).getImm();
3049 unsigned widthm1 = Inst.getOperand(3).getImm();
3050 if (widthm1 >= 32 - lsb)
3051 return Error(Operands[5]->getStartLoc(),
3052 "bitfield width must be in range [1,32-lsb]");
3056 // Thumb LDM instructions are writeback iff the base register is not
3057 // in the register list.
3058 unsigned Rn = Inst.getOperand(0).getReg();
3059 bool doesWriteback = true;
3060 for (unsigned i = 3; i < Inst.getNumOperands(); ++i) {
3061 unsigned Reg = Inst.getOperand(i).getReg();
3063 doesWriteback = false;
3064 // Anything other than a low register isn't legal here.
3065 if (!isARMLowRegister(Reg))
3066 return Error(Operands[4]->getStartLoc(),
3067 "registers must be in range r0-r7");
3069 // If we should have writeback, then there should be a '!' token.
3070 if (doesWriteback &&
3071 (!static_cast<ARMOperand*>(Operands[3])->isToken() ||
3072 static_cast<ARMOperand*>(Operands[3])->getToken() != "!"))
3073 return Error(Operands[2]->getStartLoc(),
3074 "writeback operator '!' expected");
3084 processInstruction(MCInst &Inst,
3085 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3086 switch (Inst.getOpcode()) {
3087 case ARM::LDMIA_UPD:
3088 // If this is a load of a single register via a 'pop', then we should use
3089 // a post-indexed LDR instruction instead, per the ARM ARM.
3090 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3091 Inst.getNumOperands() == 5) {
3093 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3094 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3095 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3096 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3097 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3098 TmpInst.addOperand(MCOperand::CreateImm(4));
3099 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3100 TmpInst.addOperand(Inst.getOperand(3));
3104 case ARM::STMDB_UPD:
3105 // If this is a store of a single register via a 'push', then we should use
3106 // a pre-indexed STR instruction instead, per the ARM ARM.
3107 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3108 Inst.getNumOperands() == 5) {
3110 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3111 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3112 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3113 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3114 TmpInst.addOperand(MCOperand::CreateImm(-4));
3115 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3116 TmpInst.addOperand(Inst.getOperand(3));
3121 // If the immediate is in the range 0-7, we really wanted tADDi3.
3122 if (Inst.getOperand(3).getImm() < 8)
3123 Inst.setOpcode(ARM::tADDi3);
3126 // If the conditional is AL, we really want tB.
3127 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3128 Inst.setOpcode(ARM::tB);
3133 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3134 // the ARMInsts array) instead. Getting that here requires awkward
3135 // API changes, though. Better way?
3137 extern MCInstrDesc ARMInsts[];
3139 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3140 return ARMInsts[Opcode];
3143 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3144 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3145 // suffix depending on whether they're in an IT block or not.
3146 unsigned Opc = Inst.getOpcode();
3147 MCInstrDesc &MCID = getInstDesc(Opc);
3148 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3149 assert(MCID.hasOptionalDef() &&
3150 "optionally flag setting instruction missing optional def operand");
3151 assert(MCID.NumOperands == Inst.getNumOperands() &&
3152 "operand count mismatch!");
3153 // Find the optional-def operand (cc_out).
3156 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3159 // If we're parsing Thumb1, reject it completely.
3160 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3161 return Match_MnemonicFail;
3162 // If we're parsing Thumb2, which form is legal depends on whether we're
3164 // FIXME: We don't yet do IT blocks, so just always consider it to be
3165 // that we aren't in one until we do.
3166 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3167 return Match_RequiresITBlock;
3169 // Some high-register supporting Thumb1 encodings only allow both registers
3170 // to be from r0-r7 when in Thumb2.
3171 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3172 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3173 isARMLowRegister(Inst.getOperand(2).getReg()))
3174 return Match_RequiresThumb2;
3175 // Others only require ARMv6 or later.
3176 else if (Opc == ARM::tMOVr && isThumbOne() &&
3177 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3178 isARMLowRegister(Inst.getOperand(1).getReg()))
3179 return Match_RequiresV6;
3180 return Match_Success;
3184 MatchAndEmitInstruction(SMLoc IDLoc,
3185 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3189 unsigned MatchResult;
3190 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3191 switch (MatchResult) {
3194 // Context sensitive operand constraints aren't handled by the matcher,
3195 // so check them here.
3196 if (validateInstruction(Inst, Operands))
3199 // Some instructions need post-processing to, for example, tweak which
3200 // encoding is selected.
3201 processInstruction(Inst, Operands);
3203 Out.EmitInstruction(Inst);
3205 case Match_MissingFeature:
3206 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3208 case Match_InvalidOperand: {
3209 SMLoc ErrorLoc = IDLoc;
3210 if (ErrorInfo != ~0U) {
3211 if (ErrorInfo >= Operands.size())
3212 return Error(IDLoc, "too few operands for instruction");
3214 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3215 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3218 return Error(ErrorLoc, "invalid operand for instruction");
3220 case Match_MnemonicFail:
3221 return Error(IDLoc, "invalid instruction");
3222 case Match_ConversionFail:
3223 return Error(IDLoc, "unable to convert operands to instruction");
3224 case Match_RequiresITBlock:
3225 return Error(IDLoc, "instruction only valid inside IT block");
3226 case Match_RequiresV6:
3227 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3228 case Match_RequiresThumb2:
3229 return Error(IDLoc, "instruction variant requires Thumb2");
3232 llvm_unreachable("Implement any new match types added!");
3236 /// parseDirective parses the arm specific directives
3237 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3238 StringRef IDVal = DirectiveID.getIdentifier();
3239 if (IDVal == ".word")
3240 return parseDirectiveWord(4, DirectiveID.getLoc());
3241 else if (IDVal == ".thumb")
3242 return parseDirectiveThumb(DirectiveID.getLoc());
3243 else if (IDVal == ".thumb_func")
3244 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3245 else if (IDVal == ".code")
3246 return parseDirectiveCode(DirectiveID.getLoc());
3247 else if (IDVal == ".syntax")
3248 return parseDirectiveSyntax(DirectiveID.getLoc());
3252 /// parseDirectiveWord
3253 /// ::= .word [ expression (, expression)* ]
3254 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3255 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3257 const MCExpr *Value;
3258 if (getParser().ParseExpression(Value))
3261 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3263 if (getLexer().is(AsmToken::EndOfStatement))
3266 // FIXME: Improve diagnostic.
3267 if (getLexer().isNot(AsmToken::Comma))
3268 return Error(L, "unexpected token in directive");
3277 /// parseDirectiveThumb
3279 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3280 if (getLexer().isNot(AsmToken::EndOfStatement))
3281 return Error(L, "unexpected token in directive");
3284 // TODO: set thumb mode
3285 // TODO: tell the MC streamer the mode
3286 // getParser().getStreamer().Emit???();
3290 /// parseDirectiveThumbFunc
3291 /// ::= .thumbfunc symbol_name
3292 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3293 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3294 bool isMachO = MAI.hasSubsectionsViaSymbols();
3297 // Darwin asm has function name after .thumb_func direction
3300 const AsmToken &Tok = Parser.getTok();
3301 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3302 return Error(L, "unexpected token in .thumb_func directive");
3303 Name = Tok.getString();
3304 Parser.Lex(); // Consume the identifier token.
3307 if (getLexer().isNot(AsmToken::EndOfStatement))
3308 return Error(L, "unexpected token in directive");
3311 // FIXME: assuming function name will be the line following .thumb_func
3313 Name = Parser.getTok().getString();
3316 // Mark symbol as a thumb symbol.
3317 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3318 getParser().getStreamer().EmitThumbFunc(Func);
3322 /// parseDirectiveSyntax
3323 /// ::= .syntax unified | divided
3324 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3325 const AsmToken &Tok = Parser.getTok();
3326 if (Tok.isNot(AsmToken::Identifier))
3327 return Error(L, "unexpected token in .syntax directive");
3328 StringRef Mode = Tok.getString();
3329 if (Mode == "unified" || Mode == "UNIFIED")
3331 else if (Mode == "divided" || Mode == "DIVIDED")
3332 return Error(L, "'.syntax divided' arm asssembly not supported");
3334 return Error(L, "unrecognized syntax mode in .syntax directive");
3336 if (getLexer().isNot(AsmToken::EndOfStatement))
3337 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3340 // TODO tell the MC streamer the mode
3341 // getParser().getStreamer().Emit???();
3345 /// parseDirectiveCode
3346 /// ::= .code 16 | 32
3347 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3348 const AsmToken &Tok = Parser.getTok();
3349 if (Tok.isNot(AsmToken::Integer))
3350 return Error(L, "unexpected token in .code directive");
3351 int64_t Val = Parser.getTok().getIntVal();
3357 return Error(L, "invalid operand to .code directive");
3359 if (getLexer().isNot(AsmToken::EndOfStatement))
3360 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3366 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3371 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3378 extern "C" void LLVMInitializeARMAsmLexer();
3380 /// Force static initialization.
3381 extern "C" void LLVMInitializeARMAsmParser() {
3382 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3383 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3384 LLVMInitializeARMAsmLexer();
3387 #define GET_REGISTER_MATCHER
3388 #define GET_MATCHER_IMPLEMENTATION
3389 #include "ARMGenAsmMatcher.inc"