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/MCInstrDesc.h"
22 #include "llvm/MC/MCRegisterInfo.h"
23 #include "llvm/MC/MCSubtargetInfo.h"
24 #include "llvm/MC/MCTargetAsmParser.h"
25 #include "llvm/Support/MathExtras.h"
26 #include "llvm/Support/SourceMgr.h"
27 #include "llvm/Support/TargetRegistry.h"
28 #include "llvm/Support/raw_ostream.h"
29 #include "llvm/ADT/BitVector.h"
30 #include "llvm/ADT/OwningPtr.h"
31 #include "llvm/ADT/STLExtras.h"
32 #include "llvm/ADT/SmallVector.h"
33 #include "llvm/ADT/StringExtras.h"
34 #include "llvm/ADT/StringSwitch.h"
35 #include "llvm/ADT/Twine.h"
43 class ARMAsmParser : public MCTargetAsmParser {
47 MCAsmParser &getParser() const { return Parser; }
48 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
50 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
51 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
53 int tryParseRegister();
54 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
55 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
56 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
57 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
58 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
59 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
60 const MCExpr *applyPrefixToExpr(const MCExpr *E,
61 MCSymbolRefExpr::VariantKind Variant);
64 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
65 unsigned &ShiftAmount);
66 bool parseDirectiveWord(unsigned Size, SMLoc L);
67 bool parseDirectiveThumb(SMLoc L);
68 bool parseDirectiveThumbFunc(SMLoc L);
69 bool parseDirectiveCode(SMLoc L);
70 bool parseDirectiveSyntax(SMLoc L);
72 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
73 bool &CarrySetting, unsigned &ProcessorIMod,
75 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
76 bool &CanAcceptPredicationCode);
78 bool isThumb() const {
79 // FIXME: Can tablegen auto-generate this?
80 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
82 bool isThumbOne() const {
83 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
85 bool isThumbTwo() const {
86 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2);
88 bool hasV6Ops() const {
89 return STI.getFeatureBits() & ARM::HasV6Ops;
92 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
93 setAvailableFeatures(FB);
96 /// @name Auto-generated Match Functions
99 #define GET_ASSEMBLER_HEADER
100 #include "ARMGenAsmMatcher.inc"
104 OperandMatchResultTy parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*>&);
105 OperandMatchResultTy parseCoprocNumOperand(
106 SmallVectorImpl<MCParsedAsmOperand*>&);
107 OperandMatchResultTy parseCoprocRegOperand(
108 SmallVectorImpl<MCParsedAsmOperand*>&);
109 OperandMatchResultTy parseMemBarrierOptOperand(
110 SmallVectorImpl<MCParsedAsmOperand*>&);
111 OperandMatchResultTy parseProcIFlagsOperand(
112 SmallVectorImpl<MCParsedAsmOperand*>&);
113 OperandMatchResultTy parseMSRMaskOperand(
114 SmallVectorImpl<MCParsedAsmOperand*>&);
115 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
116 StringRef Op, int Low, int High);
117 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
118 return parsePKHImm(O, "lsl", 0, 31);
120 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
121 return parsePKHImm(O, "asr", 1, 32);
123 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
124 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
125 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
126 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
127 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
128 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
130 // Asm Match Converter Methods
131 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
132 const SmallVectorImpl<MCParsedAsmOperand*> &);
133 bool cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
134 const SmallVectorImpl<MCParsedAsmOperand*> &);
135 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
136 const SmallVectorImpl<MCParsedAsmOperand*> &);
137 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
138 const SmallVectorImpl<MCParsedAsmOperand*> &);
139 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
140 const SmallVectorImpl<MCParsedAsmOperand*> &);
141 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
142 const SmallVectorImpl<MCParsedAsmOperand*> &);
143 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
144 const SmallVectorImpl<MCParsedAsmOperand*> &);
145 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
146 const SmallVectorImpl<MCParsedAsmOperand*> &);
147 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
148 const SmallVectorImpl<MCParsedAsmOperand*> &);
149 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
150 const SmallVectorImpl<MCParsedAsmOperand*> &);
151 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
152 const SmallVectorImpl<MCParsedAsmOperand*> &);
153 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
154 const SmallVectorImpl<MCParsedAsmOperand*> &);
155 bool cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
156 const SmallVectorImpl<MCParsedAsmOperand*> &);
158 bool validateInstruction(MCInst &Inst,
159 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
160 void processInstruction(MCInst &Inst,
161 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
162 bool shouldOmitCCOutOperand(StringRef Mnemonic,
163 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
166 enum ARMMatchResultTy {
167 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
172 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
173 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
174 MCAsmParserExtension::Initialize(_Parser);
176 // Initialize the set of available features.
177 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
180 // Implementation of the MCTargetAsmParser interface:
181 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
182 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
183 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
184 bool ParseDirective(AsmToken DirectiveID);
186 unsigned checkTargetMatchPredicate(MCInst &Inst);
188 bool MatchAndEmitInstruction(SMLoc IDLoc,
189 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
192 } // end anonymous namespace
196 /// ARMOperand - Instances of this class represent a parsed ARM machine
198 class ARMOperand : public MCParsedAsmOperand {
223 SMLoc StartLoc, EndLoc;
224 SmallVector<unsigned, 8> Registers;
228 ARMCC::CondCodes Val;
244 ARM_PROC::IFlags Val;
264 /// Combined record for all forms of ARM address expressions.
267 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
269 const MCConstantExpr *OffsetImm; // Offset immediate value
270 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
271 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
272 unsigned ShiftImm; // shift for OffsetReg.
273 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
279 ARM_AM::ShiftOpc ShiftTy;
288 ARM_AM::ShiftOpc ShiftTy;
294 ARM_AM::ShiftOpc ShiftTy;
307 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
309 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
311 StartLoc = o.StartLoc;
328 case DPRRegisterList:
329 case SPRRegisterList:
330 Registers = o.Registers;
345 case PostIndexRegister:
346 PostIdxReg = o.PostIdxReg;
354 case ShifterImmediate:
355 ShifterImm = o.ShifterImm;
357 case ShiftedRegister:
358 RegShiftedReg = o.RegShiftedReg;
360 case ShiftedImmediate:
361 RegShiftedImm = o.RegShiftedImm;
363 case RotateImmediate:
366 case BitfieldDescriptor:
367 Bitfield = o.Bitfield;
372 /// getStartLoc - Get the location of the first token of this operand.
373 SMLoc getStartLoc() const { return StartLoc; }
374 /// getEndLoc - Get the location of the last token of this operand.
375 SMLoc getEndLoc() const { return EndLoc; }
377 ARMCC::CondCodes getCondCode() const {
378 assert(Kind == CondCode && "Invalid access!");
382 unsigned getCoproc() const {
383 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
387 StringRef getToken() const {
388 assert(Kind == Token && "Invalid access!");
389 return StringRef(Tok.Data, Tok.Length);
392 unsigned getReg() const {
393 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
397 const SmallVectorImpl<unsigned> &getRegList() const {
398 assert((Kind == RegisterList || Kind == DPRRegisterList ||
399 Kind == SPRRegisterList) && "Invalid access!");
403 const MCExpr *getImm() const {
404 assert(Kind == Immediate && "Invalid access!");
408 ARM_MB::MemBOpt getMemBarrierOpt() const {
409 assert(Kind == MemBarrierOpt && "Invalid access!");
413 ARM_PROC::IFlags getProcIFlags() const {
414 assert(Kind == ProcIFlags && "Invalid access!");
418 unsigned getMSRMask() const {
419 assert(Kind == MSRMask && "Invalid access!");
423 bool isCoprocNum() const { return Kind == CoprocNum; }
424 bool isCoprocReg() const { return Kind == CoprocReg; }
425 bool isCondCode() const { return Kind == CondCode; }
426 bool isCCOut() const { return Kind == CCOut; }
427 bool isITMask() const { return Kind == ITCondMask; }
428 bool isITCondCode() const { return Kind == CondCode; }
429 bool isImm() const { return Kind == Immediate; }
430 bool isImm0_1020s4() const {
431 if (Kind != Immediate)
433 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
434 if (!CE) return false;
435 int64_t Value = CE->getValue();
436 return ((Value & 3) == 0) && Value >= 0 && Value <= 1020;
438 bool isImm0_508s4() const {
439 if (Kind != Immediate)
441 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
442 if (!CE) return false;
443 int64_t Value = CE->getValue();
444 return ((Value & 3) == 0) && Value >= 0 && Value <= 508;
446 bool isImm0_255() const {
447 if (Kind != Immediate)
449 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
450 if (!CE) return false;
451 int64_t Value = CE->getValue();
452 return Value >= 0 && Value < 256;
454 bool isImm0_7() const {
455 if (Kind != Immediate)
457 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
458 if (!CE) return false;
459 int64_t Value = CE->getValue();
460 return Value >= 0 && Value < 8;
462 bool isImm0_15() const {
463 if (Kind != Immediate)
465 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
466 if (!CE) return false;
467 int64_t Value = CE->getValue();
468 return Value >= 0 && Value < 16;
470 bool isImm0_31() const {
471 if (Kind != Immediate)
473 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
474 if (!CE) return false;
475 int64_t Value = CE->getValue();
476 return Value >= 0 && Value < 32;
478 bool isImm1_16() const {
479 if (Kind != Immediate)
481 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
482 if (!CE) return false;
483 int64_t Value = CE->getValue();
484 return Value > 0 && Value < 17;
486 bool isImm1_32() const {
487 if (Kind != Immediate)
489 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
490 if (!CE) return false;
491 int64_t Value = CE->getValue();
492 return Value > 0 && Value < 33;
494 bool isImm0_65535() const {
495 if (Kind != Immediate)
497 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
498 if (!CE) return false;
499 int64_t Value = CE->getValue();
500 return Value >= 0 && Value < 65536;
502 bool isImm0_65535Expr() const {
503 if (Kind != Immediate)
505 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
506 // If it's not a constant expression, it'll generate a fixup and be
508 if (!CE) return true;
509 int64_t Value = CE->getValue();
510 return Value >= 0 && Value < 65536;
512 bool isImm24bit() const {
513 if (Kind != Immediate)
515 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
516 if (!CE) return false;
517 int64_t Value = CE->getValue();
518 return Value >= 0 && Value <= 0xffffff;
520 bool isImmThumbSR() const {
521 if (Kind != Immediate)
523 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
524 if (!CE) return false;
525 int64_t Value = CE->getValue();
526 return Value > 0 && Value < 33;
528 bool isPKHLSLImm() const {
529 if (Kind != Immediate)
531 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
532 if (!CE) return false;
533 int64_t Value = CE->getValue();
534 return Value >= 0 && Value < 32;
536 bool isPKHASRImm() const {
537 if (Kind != Immediate)
539 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
540 if (!CE) return false;
541 int64_t Value = CE->getValue();
542 return Value > 0 && Value <= 32;
544 bool isARMSOImm() const {
545 if (Kind != Immediate)
547 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
548 if (!CE) return false;
549 int64_t Value = CE->getValue();
550 return ARM_AM::getSOImmVal(Value) != -1;
552 bool isT2SOImm() const {
553 if (Kind != Immediate)
555 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
556 if (!CE) return false;
557 int64_t Value = CE->getValue();
558 return ARM_AM::getT2SOImmVal(Value) != -1;
560 bool isSetEndImm() const {
561 if (Kind != Immediate)
563 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
564 if (!CE) return false;
565 int64_t Value = CE->getValue();
566 return Value == 1 || Value == 0;
568 bool isReg() const { return Kind == Register; }
569 bool isRegList() const { return Kind == RegisterList; }
570 bool isDPRRegList() const { return Kind == DPRRegisterList; }
571 bool isSPRRegList() const { return Kind == SPRRegisterList; }
572 bool isToken() const { return Kind == Token; }
573 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
574 bool isMemory() const { return Kind == Memory; }
575 bool isShifterImm() const { return Kind == ShifterImmediate; }
576 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
577 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
578 bool isRotImm() const { return Kind == RotateImmediate; }
579 bool isBitfield() const { return Kind == BitfieldDescriptor; }
580 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
581 bool isPostIdxReg() const {
582 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
584 bool isMemNoOffset() const {
587 // No offset of any kind.
588 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
590 bool isAddrMode2() const {
593 // Check for register offset.
594 if (Mem.OffsetRegNum) return true;
595 // Immediate offset in range [-4095, 4095].
596 if (!Mem.OffsetImm) return true;
597 int64_t Val = Mem.OffsetImm->getValue();
598 return Val > -4096 && Val < 4096;
600 bool isAM2OffsetImm() const {
601 if (Kind != Immediate)
603 // Immediate offset in range [-4095, 4095].
604 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
605 if (!CE) return false;
606 int64_t Val = CE->getValue();
607 return Val > -4096 && Val < 4096;
609 bool isAddrMode3() const {
612 // No shifts are legal for AM3.
613 if (Mem.ShiftType != ARM_AM::no_shift) return false;
614 // Check for register offset.
615 if (Mem.OffsetRegNum) return true;
616 // Immediate offset in range [-255, 255].
617 if (!Mem.OffsetImm) return true;
618 int64_t Val = Mem.OffsetImm->getValue();
619 return Val > -256 && Val < 256;
621 bool isAM3Offset() const {
622 if (Kind != Immediate && Kind != PostIndexRegister)
624 if (Kind == PostIndexRegister)
625 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
626 // Immediate offset in range [-255, 255].
627 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
628 if (!CE) return false;
629 int64_t Val = CE->getValue();
630 // Special case, #-0 is INT32_MIN.
631 return (Val > -256 && Val < 256) || Val == INT32_MIN;
633 bool isAddrMode5() const {
636 // Check for register offset.
637 if (Mem.OffsetRegNum) return false;
638 // Immediate offset in range [-1020, 1020] and a multiple of 4.
639 if (!Mem.OffsetImm) return true;
640 int64_t Val = Mem.OffsetImm->getValue();
641 return (Val >= -1020 && Val <= 1020 && ((Val & 3) == 0)) ||
644 bool isMemRegOffset() const {
645 if (Kind != Memory || !Mem.OffsetRegNum)
649 bool isMemThumbRR() const {
650 // Thumb reg+reg addressing is simple. Just two registers, a base and
651 // an offset. No shifts, negations or any other complicating factors.
652 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
653 Mem.ShiftType != ARM_AM::no_shift)
655 return isARMLowRegister(Mem.BaseRegNum) &&
656 (!Mem.OffsetRegNum || isARMLowRegister(Mem.OffsetRegNum));
658 bool isMemThumbRIs4() const {
659 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
660 !isARMLowRegister(Mem.BaseRegNum))
662 // Immediate offset, multiple of 4 in range [0, 124].
663 if (!Mem.OffsetImm) return true;
664 int64_t Val = Mem.OffsetImm->getValue();
665 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
667 bool isMemThumbRIs2() const {
668 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
669 !isARMLowRegister(Mem.BaseRegNum))
671 // Immediate offset, multiple of 4 in range [0, 62].
672 if (!Mem.OffsetImm) return true;
673 int64_t Val = Mem.OffsetImm->getValue();
674 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
676 bool isMemThumbRIs1() const {
677 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
678 !isARMLowRegister(Mem.BaseRegNum))
680 // Immediate offset in range [0, 31].
681 if (!Mem.OffsetImm) return true;
682 int64_t Val = Mem.OffsetImm->getValue();
683 return Val >= 0 && Val <= 31;
685 bool isMemThumbSPI() const {
686 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
688 // Immediate offset, multiple of 4 in range [0, 1020].
689 if (!Mem.OffsetImm) return true;
690 int64_t Val = Mem.OffsetImm->getValue();
691 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
693 bool isMemImm8Offset() const {
694 if (Kind != Memory || Mem.OffsetRegNum != 0)
696 // Immediate offset in range [-255, 255].
697 if (!Mem.OffsetImm) return true;
698 int64_t Val = Mem.OffsetImm->getValue();
699 return Val > -256 && Val < 256;
701 bool isMemImm12Offset() const {
702 // If we have an immediate that's not a constant, treat it as a label
703 // reference needing a fixup. If it is a constant, it's something else
705 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
708 if (Kind != Memory || Mem.OffsetRegNum != 0)
710 // Immediate offset in range [-4095, 4095].
711 if (!Mem.OffsetImm) return true;
712 int64_t Val = Mem.OffsetImm->getValue();
713 return (Val > -4096 && Val < 4096) || (Val == INT32_MIN);
715 bool isPostIdxImm8() const {
716 if (Kind != Immediate)
718 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
719 if (!CE) return false;
720 int64_t Val = CE->getValue();
721 return (Val > -256 && Val < 256) || (Val == INT32_MIN);
724 bool isMSRMask() const { return Kind == MSRMask; }
725 bool isProcIFlags() const { return Kind == ProcIFlags; }
727 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
728 // Add as immediates when possible. Null MCExpr = 0.
730 Inst.addOperand(MCOperand::CreateImm(0));
731 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
732 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
734 Inst.addOperand(MCOperand::CreateExpr(Expr));
737 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
738 assert(N == 2 && "Invalid number of operands!");
739 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
740 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
741 Inst.addOperand(MCOperand::CreateReg(RegNum));
744 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
745 assert(N == 1 && "Invalid number of operands!");
746 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
749 void addITMaskOperands(MCInst &Inst, unsigned N) const {
750 assert(N == 1 && "Invalid number of operands!");
751 Inst.addOperand(MCOperand::CreateImm(ITMask.Mask));
754 void addITCondCodeOperands(MCInst &Inst, unsigned N) const {
755 assert(N == 1 && "Invalid number of operands!");
756 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
759 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
760 assert(N == 1 && "Invalid number of operands!");
761 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
764 void addCCOutOperands(MCInst &Inst, unsigned N) const {
765 assert(N == 1 && "Invalid number of operands!");
766 Inst.addOperand(MCOperand::CreateReg(getReg()));
769 void addRegOperands(MCInst &Inst, unsigned N) const {
770 assert(N == 1 && "Invalid number of operands!");
771 Inst.addOperand(MCOperand::CreateReg(getReg()));
774 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
775 assert(N == 3 && "Invalid number of operands!");
776 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
777 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
778 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
779 Inst.addOperand(MCOperand::CreateImm(
780 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
783 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
784 assert(N == 2 && "Invalid number of operands!");
785 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
786 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
787 Inst.addOperand(MCOperand::CreateImm(
788 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
792 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
793 assert(N == 1 && "Invalid number of operands!");
794 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
798 void addRegListOperands(MCInst &Inst, unsigned N) const {
799 assert(N == 1 && "Invalid number of operands!");
800 const SmallVectorImpl<unsigned> &RegList = getRegList();
801 for (SmallVectorImpl<unsigned>::const_iterator
802 I = RegList.begin(), E = RegList.end(); I != E; ++I)
803 Inst.addOperand(MCOperand::CreateReg(*I));
806 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
807 addRegListOperands(Inst, N);
810 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
811 addRegListOperands(Inst, N);
814 void addRotImmOperands(MCInst &Inst, unsigned N) const {
815 assert(N == 1 && "Invalid number of operands!");
816 // Encoded as val>>3. The printer handles display as 8, 16, 24.
817 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
820 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
821 assert(N == 1 && "Invalid number of operands!");
822 // Munge the lsb/width into a bitfield mask.
823 unsigned lsb = Bitfield.LSB;
824 unsigned width = Bitfield.Width;
825 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
826 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
827 (32 - (lsb + width)));
828 Inst.addOperand(MCOperand::CreateImm(Mask));
831 void addImmOperands(MCInst &Inst, unsigned N) const {
832 assert(N == 1 && "Invalid number of operands!");
833 addExpr(Inst, getImm());
836 void addImm0_1020s4Operands(MCInst &Inst, unsigned N) const {
837 assert(N == 1 && "Invalid number of operands!");
838 // The immediate is scaled by four in the encoding and is stored
839 // in the MCInst as such. Lop off the low two bits here.
840 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
841 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
844 void addImm0_508s4Operands(MCInst &Inst, unsigned N) const {
845 assert(N == 1 && "Invalid number of operands!");
846 // The immediate is scaled by four in the encoding and is stored
847 // in the MCInst as such. Lop off the low two bits here.
848 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
849 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
852 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
853 assert(N == 1 && "Invalid number of operands!");
854 addExpr(Inst, getImm());
857 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
858 assert(N == 1 && "Invalid number of operands!");
859 addExpr(Inst, getImm());
862 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
863 assert(N == 1 && "Invalid number of operands!");
864 addExpr(Inst, getImm());
867 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
868 assert(N == 1 && "Invalid number of operands!");
869 addExpr(Inst, getImm());
872 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
873 assert(N == 1 && "Invalid number of operands!");
874 // The constant encodes as the immediate-1, and we store in the instruction
875 // the bits as encoded, so subtract off one here.
876 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
877 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
880 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
881 assert(N == 1 && "Invalid number of operands!");
882 // The constant encodes as the immediate-1, and we store in the instruction
883 // the bits as encoded, so subtract off one here.
884 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
885 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
888 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
889 assert(N == 1 && "Invalid number of operands!");
890 addExpr(Inst, getImm());
893 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
894 assert(N == 1 && "Invalid number of operands!");
895 addExpr(Inst, getImm());
898 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
899 assert(N == 1 && "Invalid number of operands!");
900 addExpr(Inst, getImm());
903 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
904 assert(N == 1 && "Invalid number of operands!");
905 // The constant encodes as the immediate, except for 32, which encodes as
907 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
908 unsigned Imm = CE->getValue();
909 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
912 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
913 assert(N == 1 && "Invalid number of operands!");
914 addExpr(Inst, getImm());
917 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
918 assert(N == 1 && "Invalid number of operands!");
919 // An ASR value of 32 encodes as 0, so that's how we want to add it to
920 // the instruction as well.
921 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
922 int Val = CE->getValue();
923 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
926 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
927 assert(N == 1 && "Invalid number of operands!");
928 addExpr(Inst, getImm());
931 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
932 assert(N == 1 && "Invalid number of operands!");
933 addExpr(Inst, getImm());
936 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
937 assert(N == 1 && "Invalid number of operands!");
938 addExpr(Inst, getImm());
941 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
942 assert(N == 1 && "Invalid number of operands!");
943 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
946 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
947 assert(N == 1 && "Invalid number of operands!");
948 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
951 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
952 assert(N == 3 && "Invalid number of operands!");
953 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
954 if (!Mem.OffsetRegNum) {
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::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
961 // For register offset, we encode the shift type and negation flag
963 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
964 Mem.ShiftImm, Mem.ShiftType);
966 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
967 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
968 Inst.addOperand(MCOperand::CreateImm(Val));
971 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
972 assert(N == 2 && "Invalid number of operands!");
973 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
974 assert(CE && "non-constant AM2OffsetImm operand!");
975 int32_t Val = CE->getValue();
976 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
977 // Special case for #-0
978 if (Val == INT32_MIN) Val = 0;
979 if (Val < 0) Val = -Val;
980 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
981 Inst.addOperand(MCOperand::CreateReg(0));
982 Inst.addOperand(MCOperand::CreateImm(Val));
985 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
986 assert(N == 3 && "Invalid number of operands!");
987 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
988 if (!Mem.OffsetRegNum) {
989 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
990 // Special case for #-0
991 if (Val == INT32_MIN) Val = 0;
992 if (Val < 0) Val = -Val;
993 Val = ARM_AM::getAM3Opc(AddSub, Val);
995 // For register offset, we encode the shift type and negation flag
997 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
999 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1000 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1001 Inst.addOperand(MCOperand::CreateImm(Val));
1004 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
1005 assert(N == 2 && "Invalid number of operands!");
1006 if (Kind == PostIndexRegister) {
1008 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
1009 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1010 Inst.addOperand(MCOperand::CreateImm(Val));
1015 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
1016 int32_t Val = CE->getValue();
1017 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1018 // Special case for #-0
1019 if (Val == INT32_MIN) Val = 0;
1020 if (Val < 0) Val = -Val;
1021 Val = ARM_AM::getAM3Opc(AddSub, Val);
1022 Inst.addOperand(MCOperand::CreateReg(0));
1023 Inst.addOperand(MCOperand::CreateImm(Val));
1026 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
1027 assert(N == 2 && "Invalid number of operands!");
1028 // The lower two bits are always zero and as such are not encoded.
1029 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
1030 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1031 // Special case for #-0
1032 if (Val == INT32_MIN) Val = 0;
1033 if (Val < 0) Val = -Val;
1034 Val = ARM_AM::getAM5Opc(AddSub, Val);
1035 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1036 Inst.addOperand(MCOperand::CreateImm(Val));
1039 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1040 assert(N == 2 && "Invalid number of operands!");
1041 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1042 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1043 Inst.addOperand(MCOperand::CreateImm(Val));
1046 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1047 assert(N == 2 && "Invalid number of operands!");
1048 // If this is an immediate, it's a label reference.
1049 if (Kind == Immediate) {
1050 addExpr(Inst, getImm());
1051 Inst.addOperand(MCOperand::CreateImm(0));
1055 // Otherwise, it's a normal memory reg+offset.
1056 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1057 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1058 Inst.addOperand(MCOperand::CreateImm(Val));
1061 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1062 assert(N == 3 && "Invalid number of operands!");
1063 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1064 Mem.ShiftImm, Mem.ShiftType);
1065 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1066 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1067 Inst.addOperand(MCOperand::CreateImm(Val));
1070 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1071 assert(N == 2 && "Invalid number of operands!");
1072 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1073 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1076 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1077 assert(N == 2 && "Invalid number of operands!");
1078 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1079 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1080 Inst.addOperand(MCOperand::CreateImm(Val));
1083 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1084 assert(N == 2 && "Invalid number of operands!");
1085 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 2) : 0;
1086 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1087 Inst.addOperand(MCOperand::CreateImm(Val));
1090 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1091 assert(N == 2 && "Invalid number of operands!");
1092 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue()) : 0;
1093 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1094 Inst.addOperand(MCOperand::CreateImm(Val));
1097 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1098 assert(N == 2 && "Invalid number of operands!");
1099 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1100 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1101 Inst.addOperand(MCOperand::CreateImm(Val));
1104 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1105 assert(N == 1 && "Invalid number of operands!");
1106 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1107 assert(CE && "non-constant post-idx-imm8 operand!");
1108 int Imm = CE->getValue();
1109 bool isAdd = Imm >= 0;
1110 if (Imm == INT32_MIN) Imm = 0;
1111 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1112 Inst.addOperand(MCOperand::CreateImm(Imm));
1115 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1116 assert(N == 2 && "Invalid number of operands!");
1117 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1118 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1121 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1122 assert(N == 2 && "Invalid number of operands!");
1123 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1124 // The sign, shift type, and shift amount are encoded in a single operand
1125 // using the AM2 encoding helpers.
1126 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1127 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1128 PostIdxReg.ShiftTy);
1129 Inst.addOperand(MCOperand::CreateImm(Imm));
1132 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1133 assert(N == 1 && "Invalid number of operands!");
1134 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1137 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1138 assert(N == 1 && "Invalid number of operands!");
1139 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1142 virtual void print(raw_ostream &OS) const;
1144 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1145 ARMOperand *Op = new ARMOperand(ITCondMask);
1146 Op->ITMask.Mask = Mask;
1152 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1153 ARMOperand *Op = new ARMOperand(CondCode);
1160 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1161 ARMOperand *Op = new ARMOperand(CoprocNum);
1162 Op->Cop.Val = CopVal;
1168 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1169 ARMOperand *Op = new ARMOperand(CoprocReg);
1170 Op->Cop.Val = CopVal;
1176 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1177 ARMOperand *Op = new ARMOperand(CCOut);
1178 Op->Reg.RegNum = RegNum;
1184 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1185 ARMOperand *Op = new ARMOperand(Token);
1186 Op->Tok.Data = Str.data();
1187 Op->Tok.Length = Str.size();
1193 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1194 ARMOperand *Op = new ARMOperand(Register);
1195 Op->Reg.RegNum = RegNum;
1201 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1206 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1207 Op->RegShiftedReg.ShiftTy = ShTy;
1208 Op->RegShiftedReg.SrcReg = SrcReg;
1209 Op->RegShiftedReg.ShiftReg = ShiftReg;
1210 Op->RegShiftedReg.ShiftImm = ShiftImm;
1216 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1220 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1221 Op->RegShiftedImm.ShiftTy = ShTy;
1222 Op->RegShiftedImm.SrcReg = SrcReg;
1223 Op->RegShiftedImm.ShiftImm = ShiftImm;
1229 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1231 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1232 Op->ShifterImm.isASR = isASR;
1233 Op->ShifterImm.Imm = Imm;
1239 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1240 ARMOperand *Op = new ARMOperand(RotateImmediate);
1241 Op->RotImm.Imm = Imm;
1247 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1249 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1250 Op->Bitfield.LSB = LSB;
1251 Op->Bitfield.Width = Width;
1258 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1259 SMLoc StartLoc, SMLoc EndLoc) {
1260 KindTy Kind = RegisterList;
1262 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1263 contains(Regs.front().first))
1264 Kind = DPRRegisterList;
1265 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1266 contains(Regs.front().first))
1267 Kind = SPRRegisterList;
1269 ARMOperand *Op = new ARMOperand(Kind);
1270 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1271 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1272 Op->Registers.push_back(I->first);
1273 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1274 Op->StartLoc = StartLoc;
1275 Op->EndLoc = EndLoc;
1279 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1280 ARMOperand *Op = new ARMOperand(Immediate);
1287 static ARMOperand *CreateMem(unsigned BaseRegNum,
1288 const MCConstantExpr *OffsetImm,
1289 unsigned OffsetRegNum,
1290 ARM_AM::ShiftOpc ShiftType,
1294 ARMOperand *Op = new ARMOperand(Memory);
1295 Op->Mem.BaseRegNum = BaseRegNum;
1296 Op->Mem.OffsetImm = OffsetImm;
1297 Op->Mem.OffsetRegNum = OffsetRegNum;
1298 Op->Mem.ShiftType = ShiftType;
1299 Op->Mem.ShiftImm = ShiftImm;
1300 Op->Mem.isNegative = isNegative;
1306 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1307 ARM_AM::ShiftOpc ShiftTy,
1310 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1311 Op->PostIdxReg.RegNum = RegNum;
1312 Op->PostIdxReg.isAdd = isAdd;
1313 Op->PostIdxReg.ShiftTy = ShiftTy;
1314 Op->PostIdxReg.ShiftImm = ShiftImm;
1320 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1321 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1322 Op->MBOpt.Val = Opt;
1328 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1329 ARMOperand *Op = new ARMOperand(ProcIFlags);
1330 Op->IFlags.Val = IFlags;
1336 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1337 ARMOperand *Op = new ARMOperand(MSRMask);
1338 Op->MMask.Val = MMask;
1345 } // end anonymous namespace.
1347 void ARMOperand::print(raw_ostream &OS) const {
1350 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1353 OS << "<ccout " << getReg() << ">";
1356 static char MaskStr[][6] = { "()", "(t)", "(e)", "(tt)", "(et)", "(te)",
1357 "(ee)", "(ttt)", "(ett)", "(tet)", "(eet)", "(tte)", "(ete)",
1359 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1360 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1364 OS << "<coprocessor number: " << getCoproc() << ">";
1367 OS << "<coprocessor register: " << getCoproc() << ">";
1370 OS << "<mask: " << getMSRMask() << ">";
1373 getImm()->print(OS);
1376 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1380 << " base:" << Mem.BaseRegNum;
1383 case PostIndexRegister:
1384 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1385 << PostIdxReg.RegNum;
1386 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1387 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1388 << PostIdxReg.ShiftImm;
1392 OS << "<ARM_PROC::";
1393 unsigned IFlags = getProcIFlags();
1394 for (int i=2; i >= 0; --i)
1395 if (IFlags & (1 << i))
1396 OS << ARM_PROC::IFlagsToString(1 << i);
1401 OS << "<register " << getReg() << ">";
1403 case ShifterImmediate:
1404 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1405 << " #" << ShifterImm.Imm << ">";
1407 case ShiftedRegister:
1408 OS << "<so_reg_reg "
1409 << RegShiftedReg.SrcReg
1410 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1411 << ", " << RegShiftedReg.ShiftReg << ", "
1412 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1415 case ShiftedImmediate:
1416 OS << "<so_reg_imm "
1417 << RegShiftedImm.SrcReg
1418 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1419 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1422 case RotateImmediate:
1423 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1425 case BitfieldDescriptor:
1426 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1427 << ", width: " << Bitfield.Width << ">";
1430 case DPRRegisterList:
1431 case SPRRegisterList: {
1432 OS << "<register_list ";
1434 const SmallVectorImpl<unsigned> &RegList = getRegList();
1435 for (SmallVectorImpl<unsigned>::const_iterator
1436 I = RegList.begin(), E = RegList.end(); I != E; ) {
1438 if (++I < E) OS << ", ";
1445 OS << "'" << getToken() << "'";
1450 /// @name Auto-generated Match Functions
1453 static unsigned MatchRegisterName(StringRef Name);
1457 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1458 SMLoc &StartLoc, SMLoc &EndLoc) {
1459 RegNo = tryParseRegister();
1461 return (RegNo == (unsigned)-1);
1464 /// Try to parse a register name. The token must be an Identifier when called,
1465 /// and if it is a register name the token is eaten and the register number is
1466 /// returned. Otherwise return -1.
1468 int ARMAsmParser::tryParseRegister() {
1469 const AsmToken &Tok = Parser.getTok();
1470 if (Tok.isNot(AsmToken::Identifier)) return -1;
1472 // FIXME: Validate register for the current architecture; we have to do
1473 // validation later, so maybe there is no need for this here.
1474 std::string upperCase = Tok.getString().str();
1475 std::string lowerCase = LowercaseString(upperCase);
1476 unsigned RegNum = MatchRegisterName(lowerCase);
1478 RegNum = StringSwitch<unsigned>(lowerCase)
1479 .Case("r13", ARM::SP)
1480 .Case("r14", ARM::LR)
1481 .Case("r15", ARM::PC)
1482 .Case("ip", ARM::R12)
1485 if (!RegNum) return -1;
1487 Parser.Lex(); // Eat identifier token.
1491 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1492 // If a recoverable error occurs, return 1. If an irrecoverable error
1493 // occurs, return -1. An irrecoverable error is one where tokens have been
1494 // consumed in the process of trying to parse the shifter (i.e., when it is
1495 // indeed a shifter operand, but malformed).
1496 int ARMAsmParser::tryParseShiftRegister(
1497 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1498 SMLoc S = Parser.getTok().getLoc();
1499 const AsmToken &Tok = Parser.getTok();
1500 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1502 std::string upperCase = Tok.getString().str();
1503 std::string lowerCase = LowercaseString(upperCase);
1504 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1505 .Case("lsl", ARM_AM::lsl)
1506 .Case("lsr", ARM_AM::lsr)
1507 .Case("asr", ARM_AM::asr)
1508 .Case("ror", ARM_AM::ror)
1509 .Case("rrx", ARM_AM::rrx)
1510 .Default(ARM_AM::no_shift);
1512 if (ShiftTy == ARM_AM::no_shift)
1515 Parser.Lex(); // Eat the operator.
1517 // The source register for the shift has already been added to the
1518 // operand list, so we need to pop it off and combine it into the shifted
1519 // register operand instead.
1520 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1521 if (!PrevOp->isReg())
1522 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1523 int SrcReg = PrevOp->getReg();
1526 if (ShiftTy == ARM_AM::rrx) {
1527 // RRX Doesn't have an explicit shift amount. The encoder expects
1528 // the shift register to be the same as the source register. Seems odd,
1532 // Figure out if this is shifted by a constant or a register (for non-RRX).
1533 if (Parser.getTok().is(AsmToken::Hash)) {
1534 Parser.Lex(); // Eat hash.
1535 SMLoc ImmLoc = Parser.getTok().getLoc();
1536 const MCExpr *ShiftExpr = 0;
1537 if (getParser().ParseExpression(ShiftExpr)) {
1538 Error(ImmLoc, "invalid immediate shift value");
1541 // The expression must be evaluatable as an immediate.
1542 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1544 Error(ImmLoc, "invalid immediate shift value");
1547 // Range check the immediate.
1548 // lsl, ror: 0 <= imm <= 31
1549 // lsr, asr: 0 <= imm <= 32
1550 Imm = CE->getValue();
1552 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1553 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1554 Error(ImmLoc, "immediate shift value out of range");
1557 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1558 ShiftReg = tryParseRegister();
1559 SMLoc L = Parser.getTok().getLoc();
1560 if (ShiftReg == -1) {
1561 Error (L, "expected immediate or register in shift operand");
1565 Error (Parser.getTok().getLoc(),
1566 "expected immediate or register in shift operand");
1571 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1572 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1574 S, Parser.getTok().getLoc()));
1576 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1577 S, Parser.getTok().getLoc()));
1583 /// Try to parse a register name. The token must be an Identifier when called.
1584 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1585 /// if there is a "writeback". 'true' if it's not a register.
1587 /// TODO this is likely to change to allow different register types and or to
1588 /// parse for a specific register type.
1590 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1591 SMLoc S = Parser.getTok().getLoc();
1592 int RegNo = tryParseRegister();
1596 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1598 const AsmToken &ExclaimTok = Parser.getTok();
1599 if (ExclaimTok.is(AsmToken::Exclaim)) {
1600 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1601 ExclaimTok.getLoc()));
1602 Parser.Lex(); // Eat exclaim token
1608 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1609 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1611 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1612 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1614 switch (Name.size()) {
1617 if (Name[0] != CoprocOp)
1634 if (Name[0] != CoprocOp || Name[1] != '1')
1638 case '0': return 10;
1639 case '1': return 11;
1640 case '2': return 12;
1641 case '3': return 13;
1642 case '4': return 14;
1643 case '5': return 15;
1651 /// parseITCondCode - Try to parse a condition code for an IT instruction.
1652 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1653 parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1654 SMLoc S = Parser.getTok().getLoc();
1655 const AsmToken &Tok = Parser.getTok();
1656 if (!Tok.is(AsmToken::Identifier))
1657 return MatchOperand_NoMatch;
1658 unsigned CC = StringSwitch<unsigned>(Tok.getString())
1659 .Case("eq", ARMCC::EQ)
1660 .Case("ne", ARMCC::NE)
1661 .Case("hs", ARMCC::HS)
1662 .Case("cs", ARMCC::HS)
1663 .Case("lo", ARMCC::LO)
1664 .Case("cc", ARMCC::LO)
1665 .Case("mi", ARMCC::MI)
1666 .Case("pl", ARMCC::PL)
1667 .Case("vs", ARMCC::VS)
1668 .Case("vc", ARMCC::VC)
1669 .Case("hi", ARMCC::HI)
1670 .Case("ls", ARMCC::LS)
1671 .Case("ge", ARMCC::GE)
1672 .Case("lt", ARMCC::LT)
1673 .Case("gt", ARMCC::GT)
1674 .Case("le", ARMCC::LE)
1675 .Case("al", ARMCC::AL)
1678 return MatchOperand_NoMatch;
1679 Parser.Lex(); // Eat the token.
1681 Operands.push_back(ARMOperand::CreateCondCode(ARMCC::CondCodes(CC), S));
1683 return MatchOperand_Success;
1686 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1687 /// token must be an Identifier when called, and if it is a coprocessor
1688 /// number, the token is eaten and the operand is added to the operand list.
1689 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1690 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1691 SMLoc S = Parser.getTok().getLoc();
1692 const AsmToken &Tok = Parser.getTok();
1693 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1695 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1697 return MatchOperand_NoMatch;
1699 Parser.Lex(); // Eat identifier token.
1700 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1701 return MatchOperand_Success;
1704 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1705 /// token must be an Identifier when called, and if it is a coprocessor
1706 /// number, the token is eaten and the operand is added to the operand list.
1707 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1708 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1709 SMLoc S = Parser.getTok().getLoc();
1710 const AsmToken &Tok = Parser.getTok();
1711 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1713 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1715 return MatchOperand_NoMatch;
1717 Parser.Lex(); // Eat identifier token.
1718 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1719 return MatchOperand_Success;
1722 /// Parse a register list, return it if successful else return null. The first
1723 /// token must be a '{' when called.
1725 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1726 assert(Parser.getTok().is(AsmToken::LCurly) &&
1727 "Token is not a Left Curly Brace");
1728 SMLoc S = Parser.getTok().getLoc();
1730 // Read the rest of the registers in the list.
1731 unsigned PrevRegNum = 0;
1732 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1735 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1736 Parser.Lex(); // Eat non-identifier token.
1738 const AsmToken &RegTok = Parser.getTok();
1739 SMLoc RegLoc = RegTok.getLoc();
1740 if (RegTok.isNot(AsmToken::Identifier)) {
1741 Error(RegLoc, "register expected");
1745 int RegNum = tryParseRegister();
1747 Error(RegLoc, "register expected");
1752 int Reg = PrevRegNum;
1755 Registers.push_back(std::make_pair(Reg, RegLoc));
1756 } while (Reg != RegNum);
1758 Registers.push_back(std::make_pair(RegNum, RegLoc));
1761 PrevRegNum = RegNum;
1762 } while (Parser.getTok().is(AsmToken::Comma) ||
1763 Parser.getTok().is(AsmToken::Minus));
1765 // Process the right curly brace of the list.
1766 const AsmToken &RCurlyTok = Parser.getTok();
1767 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1768 Error(RCurlyTok.getLoc(), "'}' expected");
1772 SMLoc E = RCurlyTok.getLoc();
1773 Parser.Lex(); // Eat right curly brace token.
1775 // Verify the register list.
1776 bool EmittedWarning = false;
1777 unsigned HighRegNum = 0;
1778 BitVector RegMap(32);
1779 for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
1780 const std::pair<unsigned, SMLoc> &RegInfo = Registers[i];
1781 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1784 Error(RegInfo.second, "register duplicated in register list");
1788 if (!EmittedWarning && Reg < HighRegNum)
1789 Warning(RegInfo.second,
1790 "register not in ascending order in register list");
1793 HighRegNum = std::max(Reg, HighRegNum);
1796 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1800 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1801 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1802 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1803 SMLoc S = Parser.getTok().getLoc();
1804 const AsmToken &Tok = Parser.getTok();
1805 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1806 StringRef OptStr = Tok.getString();
1808 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1809 .Case("sy", ARM_MB::SY)
1810 .Case("st", ARM_MB::ST)
1811 .Case("sh", ARM_MB::ISH)
1812 .Case("ish", ARM_MB::ISH)
1813 .Case("shst", ARM_MB::ISHST)
1814 .Case("ishst", ARM_MB::ISHST)
1815 .Case("nsh", ARM_MB::NSH)
1816 .Case("un", ARM_MB::NSH)
1817 .Case("nshst", ARM_MB::NSHST)
1818 .Case("unst", ARM_MB::NSHST)
1819 .Case("osh", ARM_MB::OSH)
1820 .Case("oshst", ARM_MB::OSHST)
1824 return MatchOperand_NoMatch;
1826 Parser.Lex(); // Eat identifier token.
1827 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1828 return MatchOperand_Success;
1831 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1832 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1833 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1834 SMLoc S = Parser.getTok().getLoc();
1835 const AsmToken &Tok = Parser.getTok();
1836 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1837 StringRef IFlagsStr = Tok.getString();
1839 unsigned IFlags = 0;
1840 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1841 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1842 .Case("a", ARM_PROC::A)
1843 .Case("i", ARM_PROC::I)
1844 .Case("f", ARM_PROC::F)
1847 // If some specific iflag is already set, it means that some letter is
1848 // present more than once, this is not acceptable.
1849 if (Flag == ~0U || (IFlags & Flag))
1850 return MatchOperand_NoMatch;
1855 Parser.Lex(); // Eat identifier token.
1856 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1857 return MatchOperand_Success;
1860 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1861 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1862 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1863 SMLoc S = Parser.getTok().getLoc();
1864 const AsmToken &Tok = Parser.getTok();
1865 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1866 StringRef Mask = Tok.getString();
1868 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1869 size_t Start = 0, Next = Mask.find('_');
1870 StringRef Flags = "";
1871 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1872 if (Next != StringRef::npos)
1873 Flags = Mask.slice(Next+1, Mask.size());
1875 // FlagsVal contains the complete mask:
1877 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1878 unsigned FlagsVal = 0;
1880 if (SpecReg == "apsr") {
1881 FlagsVal = StringSwitch<unsigned>(Flags)
1882 .Case("nzcvq", 0x8) // same as CPSR_f
1883 .Case("g", 0x4) // same as CPSR_s
1884 .Case("nzcvqg", 0xc) // same as CPSR_fs
1887 if (FlagsVal == ~0U) {
1889 return MatchOperand_NoMatch;
1891 FlagsVal = 0; // No flag
1893 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1894 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1896 for (int i = 0, e = Flags.size(); i != e; ++i) {
1897 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1904 // If some specific flag is already set, it means that some letter is
1905 // present more than once, this is not acceptable.
1906 if (FlagsVal == ~0U || (FlagsVal & Flag))
1907 return MatchOperand_NoMatch;
1910 } else // No match for special register.
1911 return MatchOperand_NoMatch;
1913 // Special register without flags are equivalent to "fc" flags.
1917 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1918 if (SpecReg == "spsr")
1921 Parser.Lex(); // Eat identifier token.
1922 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1923 return MatchOperand_Success;
1926 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1927 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1928 int Low, int High) {
1929 const AsmToken &Tok = Parser.getTok();
1930 if (Tok.isNot(AsmToken::Identifier)) {
1931 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1932 return MatchOperand_ParseFail;
1934 StringRef ShiftName = Tok.getString();
1935 std::string LowerOp = LowercaseString(Op);
1936 std::string UpperOp = UppercaseString(Op);
1937 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1938 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1939 return MatchOperand_ParseFail;
1941 Parser.Lex(); // Eat shift type token.
1943 // There must be a '#' and a shift amount.
1944 if (Parser.getTok().isNot(AsmToken::Hash)) {
1945 Error(Parser.getTok().getLoc(), "'#' expected");
1946 return MatchOperand_ParseFail;
1948 Parser.Lex(); // Eat hash token.
1950 const MCExpr *ShiftAmount;
1951 SMLoc Loc = Parser.getTok().getLoc();
1952 if (getParser().ParseExpression(ShiftAmount)) {
1953 Error(Loc, "illegal expression");
1954 return MatchOperand_ParseFail;
1956 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1958 Error(Loc, "constant expression expected");
1959 return MatchOperand_ParseFail;
1961 int Val = CE->getValue();
1962 if (Val < Low || Val > High) {
1963 Error(Loc, "immediate value out of range");
1964 return MatchOperand_ParseFail;
1967 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1969 return MatchOperand_Success;
1972 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1973 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1974 const AsmToken &Tok = Parser.getTok();
1975 SMLoc S = Tok.getLoc();
1976 if (Tok.isNot(AsmToken::Identifier)) {
1977 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1978 return MatchOperand_ParseFail;
1980 int Val = StringSwitch<int>(Tok.getString())
1984 Parser.Lex(); // Eat the token.
1987 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1988 return MatchOperand_ParseFail;
1990 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1992 S, Parser.getTok().getLoc()));
1993 return MatchOperand_Success;
1996 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1997 /// instructions. Legal values are:
1998 /// lsl #n 'n' in [0,31]
1999 /// asr #n 'n' in [1,32]
2000 /// n == 32 encoded as n == 0.
2001 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2002 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2003 const AsmToken &Tok = Parser.getTok();
2004 SMLoc S = Tok.getLoc();
2005 if (Tok.isNot(AsmToken::Identifier)) {
2006 Error(S, "shift operator 'asr' or 'lsl' expected");
2007 return MatchOperand_ParseFail;
2009 StringRef ShiftName = Tok.getString();
2011 if (ShiftName == "lsl" || ShiftName == "LSL")
2013 else if (ShiftName == "asr" || ShiftName == "ASR")
2016 Error(S, "shift operator 'asr' or 'lsl' expected");
2017 return MatchOperand_ParseFail;
2019 Parser.Lex(); // Eat the operator.
2021 // A '#' and a shift amount.
2022 if (Parser.getTok().isNot(AsmToken::Hash)) {
2023 Error(Parser.getTok().getLoc(), "'#' expected");
2024 return MatchOperand_ParseFail;
2026 Parser.Lex(); // Eat hash token.
2028 const MCExpr *ShiftAmount;
2029 SMLoc E = Parser.getTok().getLoc();
2030 if (getParser().ParseExpression(ShiftAmount)) {
2031 Error(E, "malformed shift expression");
2032 return MatchOperand_ParseFail;
2034 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2036 Error(E, "shift amount must be an immediate");
2037 return MatchOperand_ParseFail;
2040 int64_t Val = CE->getValue();
2042 // Shift amount must be in [1,32]
2043 if (Val < 1 || Val > 32) {
2044 Error(E, "'asr' shift amount must be in range [1,32]");
2045 return MatchOperand_ParseFail;
2047 // asr #32 encoded as asr #0.
2048 if (Val == 32) Val = 0;
2050 // Shift amount must be in [1,32]
2051 if (Val < 0 || Val > 31) {
2052 Error(E, "'lsr' shift amount must be in range [0,31]");
2053 return MatchOperand_ParseFail;
2057 E = Parser.getTok().getLoc();
2058 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2060 return MatchOperand_Success;
2063 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2064 /// of instructions. Legal values are:
2065 /// ror #n 'n' in {0, 8, 16, 24}
2066 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2067 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2068 const AsmToken &Tok = Parser.getTok();
2069 SMLoc S = Tok.getLoc();
2070 if (Tok.isNot(AsmToken::Identifier)) {
2071 Error(S, "rotate operator 'ror' expected");
2072 return MatchOperand_ParseFail;
2074 StringRef ShiftName = Tok.getString();
2075 if (ShiftName != "ror" && ShiftName != "ROR") {
2076 Error(S, "rotate operator 'ror' expected");
2077 return MatchOperand_ParseFail;
2079 Parser.Lex(); // Eat the operator.
2081 // A '#' and a rotate amount.
2082 if (Parser.getTok().isNot(AsmToken::Hash)) {
2083 Error(Parser.getTok().getLoc(), "'#' expected");
2084 return MatchOperand_ParseFail;
2086 Parser.Lex(); // Eat hash token.
2088 const MCExpr *ShiftAmount;
2089 SMLoc E = Parser.getTok().getLoc();
2090 if (getParser().ParseExpression(ShiftAmount)) {
2091 Error(E, "malformed rotate expression");
2092 return MatchOperand_ParseFail;
2094 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2096 Error(E, "rotate amount must be an immediate");
2097 return MatchOperand_ParseFail;
2100 int64_t Val = CE->getValue();
2101 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2102 // normally, zero is represented in asm by omitting the rotate operand
2104 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2105 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2106 return MatchOperand_ParseFail;
2109 E = Parser.getTok().getLoc();
2110 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2112 return MatchOperand_Success;
2115 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2116 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2117 SMLoc S = Parser.getTok().getLoc();
2118 // The bitfield descriptor is really two operands, the LSB and the width.
2119 if (Parser.getTok().isNot(AsmToken::Hash)) {
2120 Error(Parser.getTok().getLoc(), "'#' expected");
2121 return MatchOperand_ParseFail;
2123 Parser.Lex(); // Eat hash token.
2125 const MCExpr *LSBExpr;
2126 SMLoc E = Parser.getTok().getLoc();
2127 if (getParser().ParseExpression(LSBExpr)) {
2128 Error(E, "malformed immediate expression");
2129 return MatchOperand_ParseFail;
2131 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2133 Error(E, "'lsb' operand must be an immediate");
2134 return MatchOperand_ParseFail;
2137 int64_t LSB = CE->getValue();
2138 // The LSB must be in the range [0,31]
2139 if (LSB < 0 || LSB > 31) {
2140 Error(E, "'lsb' operand must be in the range [0,31]");
2141 return MatchOperand_ParseFail;
2143 E = Parser.getTok().getLoc();
2145 // Expect another immediate operand.
2146 if (Parser.getTok().isNot(AsmToken::Comma)) {
2147 Error(Parser.getTok().getLoc(), "too few operands");
2148 return MatchOperand_ParseFail;
2150 Parser.Lex(); // Eat hash token.
2151 if (Parser.getTok().isNot(AsmToken::Hash)) {
2152 Error(Parser.getTok().getLoc(), "'#' expected");
2153 return MatchOperand_ParseFail;
2155 Parser.Lex(); // Eat hash token.
2157 const MCExpr *WidthExpr;
2158 if (getParser().ParseExpression(WidthExpr)) {
2159 Error(E, "malformed immediate expression");
2160 return MatchOperand_ParseFail;
2162 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2164 Error(E, "'width' operand must be an immediate");
2165 return MatchOperand_ParseFail;
2168 int64_t Width = CE->getValue();
2169 // The LSB must be in the range [1,32-lsb]
2170 if (Width < 1 || Width > 32 - LSB) {
2171 Error(E, "'width' operand must be in the range [1,32-lsb]");
2172 return MatchOperand_ParseFail;
2174 E = Parser.getTok().getLoc();
2176 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2178 return MatchOperand_Success;
2181 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2182 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2183 // Check for a post-index addressing register operand. Specifically:
2184 // postidx_reg := '+' register {, shift}
2185 // | '-' register {, shift}
2186 // | register {, shift}
2188 // This method must return MatchOperand_NoMatch without consuming any tokens
2189 // in the case where there is no match, as other alternatives take other
2191 AsmToken Tok = Parser.getTok();
2192 SMLoc S = Tok.getLoc();
2193 bool haveEaten = false;
2196 if (Tok.is(AsmToken::Plus)) {
2197 Parser.Lex(); // Eat the '+' token.
2199 } else if (Tok.is(AsmToken::Minus)) {
2200 Parser.Lex(); // Eat the '-' token.
2204 if (Parser.getTok().is(AsmToken::Identifier))
2205 Reg = tryParseRegister();
2208 return MatchOperand_NoMatch;
2209 Error(Parser.getTok().getLoc(), "register expected");
2210 return MatchOperand_ParseFail;
2212 SMLoc E = Parser.getTok().getLoc();
2214 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2215 unsigned ShiftImm = 0;
2216 if (Parser.getTok().is(AsmToken::Comma)) {
2217 Parser.Lex(); // Eat the ','.
2218 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2219 return MatchOperand_ParseFail;
2222 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2225 return MatchOperand_Success;
2228 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2229 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2230 // Check for a post-index addressing register operand. Specifically:
2231 // am3offset := '+' register
2238 // This method must return MatchOperand_NoMatch without consuming any tokens
2239 // in the case where there is no match, as other alternatives take other
2241 AsmToken Tok = Parser.getTok();
2242 SMLoc S = Tok.getLoc();
2244 // Do immediates first, as we always parse those if we have a '#'.
2245 if (Parser.getTok().is(AsmToken::Hash)) {
2246 Parser.Lex(); // Eat the '#'.
2247 // Explicitly look for a '-', as we need to encode negative zero
2249 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2250 const MCExpr *Offset;
2251 if (getParser().ParseExpression(Offset))
2252 return MatchOperand_ParseFail;
2253 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2255 Error(S, "constant expression expected");
2256 return MatchOperand_ParseFail;
2258 SMLoc E = Tok.getLoc();
2259 // Negative zero is encoded as the flag value INT32_MIN.
2260 int32_t Val = CE->getValue();
2261 if (isNegative && Val == 0)
2265 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2267 return MatchOperand_Success;
2271 bool haveEaten = false;
2274 if (Tok.is(AsmToken::Plus)) {
2275 Parser.Lex(); // Eat the '+' token.
2277 } else if (Tok.is(AsmToken::Minus)) {
2278 Parser.Lex(); // Eat the '-' token.
2282 if (Parser.getTok().is(AsmToken::Identifier))
2283 Reg = tryParseRegister();
2286 return MatchOperand_NoMatch;
2287 Error(Parser.getTok().getLoc(), "register expected");
2288 return MatchOperand_ParseFail;
2290 SMLoc E = Parser.getTok().getLoc();
2292 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2295 return MatchOperand_Success;
2298 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2299 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2300 /// when they refer multiple MIOperands inside a single one.
2302 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2303 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2304 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2306 // Create a writeback register dummy placeholder.
2307 Inst.addOperand(MCOperand::CreateImm(0));
2309 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2310 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2314 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2315 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2316 /// when they refer multiple MIOperands inside a single one.
2318 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2319 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2320 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2322 // Create a writeback register dummy placeholder.
2323 Inst.addOperand(MCOperand::CreateImm(0));
2325 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2326 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2331 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2332 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2333 /// when they refer multiple MIOperands inside a single one.
2335 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2336 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2337 // Create a writeback register dummy placeholder.
2338 Inst.addOperand(MCOperand::CreateImm(0));
2339 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2340 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2341 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2345 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2346 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2347 /// when they refer multiple MIOperands inside a single one.
2349 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2350 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2351 // Create a writeback register dummy placeholder.
2352 Inst.addOperand(MCOperand::CreateImm(0));
2353 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2354 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2355 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2359 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2360 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2361 /// when they refer multiple MIOperands inside a single one.
2363 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2364 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2365 // Create a writeback register dummy placeholder.
2366 Inst.addOperand(MCOperand::CreateImm(0));
2367 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2368 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2369 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2373 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2374 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2375 /// when they refer multiple MIOperands inside a single one.
2377 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2378 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2380 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2381 // Create a writeback register dummy placeholder.
2382 Inst.addOperand(MCOperand::CreateImm(0));
2384 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2386 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2388 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2392 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2393 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2394 /// when they refer multiple MIOperands inside a single one.
2396 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2397 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2399 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2400 // Create a writeback register dummy placeholder.
2401 Inst.addOperand(MCOperand::CreateImm(0));
2403 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2405 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2407 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2411 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2412 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2413 /// when they refer multiple MIOperands inside a single one.
2415 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2416 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2417 // Create a writeback register dummy placeholder.
2418 Inst.addOperand(MCOperand::CreateImm(0));
2420 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2422 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2424 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2426 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2430 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2431 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2432 /// when they refer multiple MIOperands inside a single one.
2434 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2435 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2436 // Create a writeback register dummy placeholder.
2437 Inst.addOperand(MCOperand::CreateImm(0));
2439 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2441 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2443 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2445 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2449 /// cvtLdrdPre - Convert parsed operands to MCInst.
2450 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2451 /// when they refer multiple MIOperands inside a single one.
2453 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2454 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2456 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2457 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2458 // Create a writeback register dummy placeholder.
2459 Inst.addOperand(MCOperand::CreateImm(0));
2461 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2463 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2467 /// cvtStrdPre - Convert parsed operands to MCInst.
2468 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2469 /// when they refer multiple MIOperands inside a single one.
2471 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2472 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2473 // Create a writeback register dummy placeholder.
2474 Inst.addOperand(MCOperand::CreateImm(0));
2476 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2477 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2479 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2481 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2485 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2486 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2487 /// when they refer multiple MIOperands inside a single one.
2489 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2490 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2491 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2492 // Create a writeback register dummy placeholder.
2493 Inst.addOperand(MCOperand::CreateImm(0));
2494 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2495 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2499 /// cvtThumbMultiple- Convert parsed operands to MCInst.
2500 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2501 /// when they refer multiple MIOperands inside a single one.
2503 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
2504 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2505 // The second source operand must be the same register as the destination
2507 if (Operands.size() == 6 &&
2508 (((ARMOperand*)Operands[3])->getReg() !=
2509 ((ARMOperand*)Operands[5])->getReg()) &&
2510 (((ARMOperand*)Operands[3])->getReg() !=
2511 ((ARMOperand*)Operands[4])->getReg())) {
2512 Error(Operands[3]->getStartLoc(),
2513 "destination register must match source register");
2516 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2517 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
2518 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
2519 // If we have a three-operand form, use that, else the second source operand
2520 // is just the destination operand again.
2521 if (Operands.size() == 6)
2522 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
2524 Inst.addOperand(Inst.getOperand(0));
2525 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
2530 /// Parse an ARM memory expression, return false if successful else return true
2531 /// or an error. The first token must be a '[' when called.
2533 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2535 assert(Parser.getTok().is(AsmToken::LBrac) &&
2536 "Token is not a Left Bracket");
2537 S = Parser.getTok().getLoc();
2538 Parser.Lex(); // Eat left bracket token.
2540 const AsmToken &BaseRegTok = Parser.getTok();
2541 int BaseRegNum = tryParseRegister();
2542 if (BaseRegNum == -1)
2543 return Error(BaseRegTok.getLoc(), "register expected");
2545 // The next token must either be a comma or a closing bracket.
2546 const AsmToken &Tok = Parser.getTok();
2547 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2548 return Error(Tok.getLoc(), "malformed memory operand");
2550 if (Tok.is(AsmToken::RBrac)) {
2552 Parser.Lex(); // Eat right bracket token.
2554 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2560 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2561 Parser.Lex(); // Eat the comma.
2563 // If we have a '#' it's an immediate offset, else assume it's a register
2565 if (Parser.getTok().is(AsmToken::Hash)) {
2566 Parser.Lex(); // Eat the '#'.
2567 E = Parser.getTok().getLoc();
2569 bool isNegative = getParser().getTok().is(AsmToken::Minus);
2570 const MCExpr *Offset;
2571 if (getParser().ParseExpression(Offset))
2574 // The expression has to be a constant. Memory references with relocations
2575 // don't come through here, as they use the <label> forms of the relevant
2577 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2579 return Error (E, "constant expression expected");
2581 // If the constant was #-0, represent it as INT32_MIN.
2582 int32_t Val = CE->getValue();
2583 if (isNegative && Val == 0)
2584 CE = MCConstantExpr::Create(INT32_MIN, getContext());
2586 // Now we should have the closing ']'
2587 E = Parser.getTok().getLoc();
2588 if (Parser.getTok().isNot(AsmToken::RBrac))
2589 return Error(E, "']' expected");
2590 Parser.Lex(); // Eat right bracket token.
2592 // Don't worry about range checking the value here. That's handled by
2593 // the is*() predicates.
2594 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2595 ARM_AM::no_shift, 0, false, S,E));
2597 // If there's a pre-indexing writeback marker, '!', just add it as a token
2599 if (Parser.getTok().is(AsmToken::Exclaim)) {
2600 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2601 Parser.Lex(); // Eat the '!'.
2607 // The register offset is optionally preceded by a '+' or '-'
2608 bool isNegative = false;
2609 if (Parser.getTok().is(AsmToken::Minus)) {
2611 Parser.Lex(); // Eat the '-'.
2612 } else if (Parser.getTok().is(AsmToken::Plus)) {
2614 Parser.Lex(); // Eat the '+'.
2617 E = Parser.getTok().getLoc();
2618 int OffsetRegNum = tryParseRegister();
2619 if (OffsetRegNum == -1)
2620 return Error(E, "register expected");
2622 // If there's a shift operator, handle it.
2623 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2624 unsigned ShiftImm = 0;
2625 if (Parser.getTok().is(AsmToken::Comma)) {
2626 Parser.Lex(); // Eat the ','.
2627 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2631 // Now we should have the closing ']'
2632 E = Parser.getTok().getLoc();
2633 if (Parser.getTok().isNot(AsmToken::RBrac))
2634 return Error(E, "']' expected");
2635 Parser.Lex(); // Eat right bracket token.
2637 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2638 ShiftType, ShiftImm, isNegative,
2641 // If there's a pre-indexing writeback marker, '!', just add it as a token
2643 if (Parser.getTok().is(AsmToken::Exclaim)) {
2644 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2645 Parser.Lex(); // Eat the '!'.
2651 /// parseMemRegOffsetShift - one of these two:
2652 /// ( lsl | lsr | asr | ror ) , # shift_amount
2654 /// return true if it parses a shift otherwise it returns false.
2655 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2657 SMLoc Loc = Parser.getTok().getLoc();
2658 const AsmToken &Tok = Parser.getTok();
2659 if (Tok.isNot(AsmToken::Identifier))
2661 StringRef ShiftName = Tok.getString();
2662 if (ShiftName == "lsl" || ShiftName == "LSL")
2664 else if (ShiftName == "lsr" || ShiftName == "LSR")
2666 else if (ShiftName == "asr" || ShiftName == "ASR")
2668 else if (ShiftName == "ror" || ShiftName == "ROR")
2670 else if (ShiftName == "rrx" || ShiftName == "RRX")
2673 return Error(Loc, "illegal shift operator");
2674 Parser.Lex(); // Eat shift type token.
2676 // rrx stands alone.
2678 if (St != ARM_AM::rrx) {
2679 Loc = Parser.getTok().getLoc();
2680 // A '#' and a shift amount.
2681 const AsmToken &HashTok = Parser.getTok();
2682 if (HashTok.isNot(AsmToken::Hash))
2683 return Error(HashTok.getLoc(), "'#' expected");
2684 Parser.Lex(); // Eat hash token.
2687 if (getParser().ParseExpression(Expr))
2689 // Range check the immediate.
2690 // lsl, ror: 0 <= imm <= 31
2691 // lsr, asr: 0 <= imm <= 32
2692 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2694 return Error(Loc, "shift amount must be an immediate");
2695 int64_t Imm = CE->getValue();
2697 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2698 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2699 return Error(Loc, "immediate shift value out of range");
2706 /// Parse a arm instruction operand. For now this parses the operand regardless
2707 /// of the mnemonic.
2708 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2709 StringRef Mnemonic) {
2712 // Check if the current operand has a custom associated parser, if so, try to
2713 // custom parse the operand, or fallback to the general approach.
2714 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2715 if (ResTy == MatchOperand_Success)
2717 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2718 // there was a match, but an error occurred, in which case, just return that
2719 // the operand parsing failed.
2720 if (ResTy == MatchOperand_ParseFail)
2723 switch (getLexer().getKind()) {
2725 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2727 case AsmToken::Identifier: {
2728 if (!tryParseRegisterWithWriteBack(Operands))
2730 int Res = tryParseShiftRegister(Operands);
2731 if (Res == 0) // success
2733 else if (Res == -1) // irrecoverable error
2736 // Fall though for the Identifier case that is not a register or a
2739 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2740 case AsmToken::Dot: { // . as a branch target
2741 // This was not a register so parse other operands that start with an
2742 // identifier (like labels) as expressions and create them as immediates.
2743 const MCExpr *IdVal;
2744 S = Parser.getTok().getLoc();
2745 if (getParser().ParseExpression(IdVal))
2747 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2748 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2751 case AsmToken::LBrac:
2752 return parseMemory(Operands);
2753 case AsmToken::LCurly:
2754 return parseRegisterList(Operands);
2755 case AsmToken::Hash: {
2756 // #42 -> immediate.
2757 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2758 S = Parser.getTok().getLoc();
2760 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2761 const MCExpr *ImmVal;
2762 if (getParser().ParseExpression(ImmVal))
2764 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ImmVal);
2766 Error(S, "constant expression expected");
2767 return MatchOperand_ParseFail;
2769 int32_t Val = CE->getValue();
2770 if (isNegative && Val == 0)
2771 ImmVal = MCConstantExpr::Create(INT32_MIN, getContext());
2772 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2773 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2776 case AsmToken::Colon: {
2777 // ":lower16:" and ":upper16:" expression prefixes
2778 // FIXME: Check it's an expression prefix,
2779 // e.g. (FOO - :lower16:BAR) isn't legal.
2780 ARMMCExpr::VariantKind RefKind;
2781 if (parsePrefix(RefKind))
2784 const MCExpr *SubExprVal;
2785 if (getParser().ParseExpression(SubExprVal))
2788 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2790 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2791 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2797 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2798 // :lower16: and :upper16:.
2799 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2800 RefKind = ARMMCExpr::VK_ARM_None;
2802 // :lower16: and :upper16: modifiers
2803 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2804 Parser.Lex(); // Eat ':'
2806 if (getLexer().isNot(AsmToken::Identifier)) {
2807 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2811 StringRef IDVal = Parser.getTok().getIdentifier();
2812 if (IDVal == "lower16") {
2813 RefKind = ARMMCExpr::VK_ARM_LO16;
2814 } else if (IDVal == "upper16") {
2815 RefKind = ARMMCExpr::VK_ARM_HI16;
2817 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2822 if (getLexer().isNot(AsmToken::Colon)) {
2823 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2826 Parser.Lex(); // Eat the last ':'
2831 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2832 MCSymbolRefExpr::VariantKind Variant) {
2833 // Recurse over the given expression, rebuilding it to apply the given variant
2834 // to the leftmost symbol.
2835 if (Variant == MCSymbolRefExpr::VK_None)
2838 switch (E->getKind()) {
2839 case MCExpr::Target:
2840 llvm_unreachable("Can't handle target expr yet");
2841 case MCExpr::Constant:
2842 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2844 case MCExpr::SymbolRef: {
2845 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2847 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2850 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2854 llvm_unreachable("Can't handle unary expressions yet");
2856 case MCExpr::Binary: {
2857 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2858 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2859 const MCExpr *RHS = BE->getRHS();
2863 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2867 assert(0 && "Invalid expression kind!");
2871 /// \brief Given a mnemonic, split out possible predication code and carry
2872 /// setting letters to form a canonical mnemonic and flags.
2874 // FIXME: Would be nice to autogen this.
2875 // FIXME: This is a bit of a maze of special cases.
2876 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2877 unsigned &PredicationCode,
2879 unsigned &ProcessorIMod,
2880 StringRef &ITMask) {
2881 PredicationCode = ARMCC::AL;
2882 CarrySetting = false;
2885 // Ignore some mnemonics we know aren't predicated forms.
2887 // FIXME: Would be nice to autogen this.
2888 if ((Mnemonic == "movs" && isThumb()) ||
2889 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2890 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2891 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2892 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2893 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2894 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2895 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2898 // First, split out any predication code. Ignore mnemonics we know aren't
2899 // predicated but do have a carry-set and so weren't caught above.
2900 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2901 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2902 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
2903 Mnemonic != "sbcs") {
2904 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2905 .Case("eq", ARMCC::EQ)
2906 .Case("ne", ARMCC::NE)
2907 .Case("hs", ARMCC::HS)
2908 .Case("cs", ARMCC::HS)
2909 .Case("lo", ARMCC::LO)
2910 .Case("cc", ARMCC::LO)
2911 .Case("mi", ARMCC::MI)
2912 .Case("pl", ARMCC::PL)
2913 .Case("vs", ARMCC::VS)
2914 .Case("vc", ARMCC::VC)
2915 .Case("hi", ARMCC::HI)
2916 .Case("ls", ARMCC::LS)
2917 .Case("ge", ARMCC::GE)
2918 .Case("lt", ARMCC::LT)
2919 .Case("gt", ARMCC::GT)
2920 .Case("le", ARMCC::LE)
2921 .Case("al", ARMCC::AL)
2924 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2925 PredicationCode = CC;
2929 // Next, determine if we have a carry setting bit. We explicitly ignore all
2930 // the instructions we know end in 's'.
2931 if (Mnemonic.endswith("s") &&
2932 !(Mnemonic == "cps" || Mnemonic == "mls" ||
2933 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2934 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2935 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2936 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2937 (Mnemonic == "movs" && isThumb()))) {
2938 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2939 CarrySetting = true;
2942 // The "cps" instruction can have a interrupt mode operand which is glued into
2943 // the mnemonic. Check if this is the case, split it and parse the imod op
2944 if (Mnemonic.startswith("cps")) {
2945 // Split out any imod code.
2947 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2948 .Case("ie", ARM_PROC::IE)
2949 .Case("id", ARM_PROC::ID)
2952 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2953 ProcessorIMod = IMod;
2957 // The "it" instruction has the condition mask on the end of the mnemonic.
2958 if (Mnemonic.startswith("it")) {
2959 ITMask = Mnemonic.slice(2, Mnemonic.size());
2960 Mnemonic = Mnemonic.slice(0, 2);
2966 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2967 /// inclusion of carry set or predication code operands.
2969 // FIXME: It would be nice to autogen this.
2971 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2972 bool &CanAcceptPredicationCode) {
2973 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2974 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2975 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2976 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2977 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2978 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2979 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2980 Mnemonic == "eor" || Mnemonic == "smlal" || Mnemonic == "neg" ||
2981 // FIXME: We need a better way. This really confused Thumb2
2982 // parsing for 'mov'.
2983 (Mnemonic == "mov" && !isThumbOne())) {
2984 CanAcceptCarrySet = true;
2986 CanAcceptCarrySet = false;
2989 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2990 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2991 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2992 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2993 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2994 Mnemonic == "setend" ||
2995 (Mnemonic == "nop" && isThumbOne()) ||
2996 ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw") &&
2998 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs")) &&
3000 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
3001 CanAcceptPredicationCode = false;
3003 CanAcceptPredicationCode = true;
3007 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
3008 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
3009 CanAcceptPredicationCode = false;
3012 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
3013 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3015 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
3016 // another does not. Specifically, the MOVW instruction does not. So we
3017 // special case it here and remove the defaulted (non-setting) cc_out
3018 // operand if that's the instruction we're trying to match.
3020 // We do this as post-processing of the explicit operands rather than just
3021 // conditionally adding the cc_out in the first place because we need
3022 // to check the type of the parsed immediate operand.
3023 if (Mnemonic == "mov" && Operands.size() > 4 &&
3024 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
3025 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
3026 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3029 // Register-register 'add' for thumb does not have a cc_out operand
3030 // when there are only two register operands.
3031 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
3032 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3033 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3034 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3036 // Register-register 'add' for thumb does not have a cc_out operand
3037 // when it's an ADD Rdm, SP, {Rdm|#imm} instruction.
3038 if (isThumb() && Mnemonic == "add" && Operands.size() == 6 &&
3039 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3040 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3041 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
3042 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3044 // Register-register 'add/sub' for thumb does not have a cc_out operand
3045 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
3046 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
3047 // right, this will result in better diagnostics (which operand is off)
3049 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
3050 (Operands.size() == 5 || Operands.size() == 6) &&
3051 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3052 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
3053 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3059 /// Parse an arm instruction mnemonic followed by its operands.
3060 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
3061 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3062 // Create the leading tokens for the mnemonic, split by '.' characters.
3063 size_t Start = 0, Next = Name.find('.');
3064 StringRef Mnemonic = Name.slice(Start, Next);
3066 // Split out the predication code and carry setting flag from the mnemonic.
3067 unsigned PredicationCode;
3068 unsigned ProcessorIMod;
3071 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
3072 ProcessorIMod, ITMask);
3074 // In Thumb1, only the branch (B) instruction can be predicated.
3075 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
3076 Parser.EatToEndOfStatement();
3077 return Error(NameLoc, "conditional execution not supported in Thumb1");
3080 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
3082 // Handle the IT instruction ITMask. Convert it to a bitmask. This
3083 // is the mask as it will be for the IT encoding if the conditional
3084 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
3085 // where the conditional bit0 is zero, the instruction post-processing
3086 // will adjust the mask accordingly.
3087 if (Mnemonic == "it") {
3089 for (unsigned i = ITMask.size(); i != 0; --i) {
3090 char pos = ITMask[i - 1];
3091 if (pos != 't' && pos != 'e') {
3092 Parser.EatToEndOfStatement();
3093 return Error(NameLoc, "illegal IT instruction mask '" + ITMask + "'");
3096 if (ITMask[i - 1] == 't')
3099 Operands.push_back(ARMOperand::CreateITMask(Mask, NameLoc));
3102 // FIXME: This is all a pretty gross hack. We should automatically handle
3103 // optional operands like this via tblgen.
3105 // Next, add the CCOut and ConditionCode operands, if needed.
3107 // For mnemonics which can ever incorporate a carry setting bit or predication
3108 // code, our matching model involves us always generating CCOut and
3109 // ConditionCode operands to match the mnemonic "as written" and then we let
3110 // the matcher deal with finding the right instruction or generating an
3111 // appropriate error.
3112 bool CanAcceptCarrySet, CanAcceptPredicationCode;
3113 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
3115 // If we had a carry-set on an instruction that can't do that, issue an
3117 if (!CanAcceptCarrySet && CarrySetting) {
3118 Parser.EatToEndOfStatement();
3119 return Error(NameLoc, "instruction '" + Mnemonic +
3120 "' can not set flags, but 's' suffix specified");
3122 // If we had a predication code on an instruction that can't do that, issue an
3124 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
3125 Parser.EatToEndOfStatement();
3126 return Error(NameLoc, "instruction '" + Mnemonic +
3127 "' is not predicable, but condition code specified");
3130 // Add the carry setting operand, if necessary.
3132 // FIXME: It would be awesome if we could somehow invent a location such that
3133 // match errors on this operand would print a nice diagnostic about how the
3134 // 's' character in the mnemonic resulted in a CCOut operand.
3135 if (CanAcceptCarrySet)
3136 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
3139 // Add the predication code operand, if necessary.
3140 if (CanAcceptPredicationCode) {
3141 Operands.push_back(ARMOperand::CreateCondCode(
3142 ARMCC::CondCodes(PredicationCode), NameLoc));
3145 // Add the processor imod operand, if necessary.
3146 if (ProcessorIMod) {
3147 Operands.push_back(ARMOperand::CreateImm(
3148 MCConstantExpr::Create(ProcessorIMod, getContext()),
3152 // Add the remaining tokens in the mnemonic.
3153 while (Next != StringRef::npos) {
3155 Next = Name.find('.', Start + 1);
3156 StringRef ExtraToken = Name.slice(Start, Next);
3158 // For now, we're only parsing Thumb1 (for the most part), so
3159 // just ignore ".n" qualifiers. We'll use them to restrict
3160 // matching when we do Thumb2.
3161 if (ExtraToken != ".n")
3162 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
3165 // Read the remaining operands.
3166 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3167 // Read the first operand.
3168 if (parseOperand(Operands, Mnemonic)) {
3169 Parser.EatToEndOfStatement();
3173 while (getLexer().is(AsmToken::Comma)) {
3174 Parser.Lex(); // Eat the comma.
3176 // Parse and remember the operand.
3177 if (parseOperand(Operands, Mnemonic)) {
3178 Parser.EatToEndOfStatement();
3184 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3185 Parser.EatToEndOfStatement();
3186 return TokError("unexpected token in argument list");
3189 Parser.Lex(); // Consume the EndOfStatement
3191 // Some instructions, mostly Thumb, have forms for the same mnemonic that
3192 // do and don't have a cc_out optional-def operand. With some spot-checks
3193 // of the operand list, we can figure out which variant we're trying to
3194 // parse and adjust accordingly before actually matching. Reason number
3195 // #317 the table driven matcher doesn't fit well with the ARM instruction
3197 if (shouldOmitCCOutOperand(Mnemonic, Operands)) {
3198 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3199 Operands.erase(Operands.begin() + 1);
3203 // ARM mode 'blx' need special handling, as the register operand version
3204 // is predicable, but the label operand version is not. So, we can't rely
3205 // on the Mnemonic based checking to correctly figure out when to put
3206 // a CondCode operand in the list. If we're trying to match the label
3207 // version, remove the CondCode operand here.
3208 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
3209 static_cast<ARMOperand*>(Operands[2])->isImm()) {
3210 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3211 Operands.erase(Operands.begin() + 1);
3215 // The vector-compare-to-zero instructions have a literal token "#0" at
3216 // the end that comes to here as an immediate operand. Convert it to a
3217 // token to play nicely with the matcher.
3218 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
3219 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
3220 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3221 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3222 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3223 if (CE && CE->getValue() == 0) {
3224 Operands.erase(Operands.begin() + 5);
3225 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3229 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
3230 // end. Convert it to a token here.
3231 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
3232 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3233 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3234 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3235 if (CE && CE->getValue() == 0) {
3236 Operands.erase(Operands.begin() + 5);
3237 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3245 // Validate context-sensitive operand constraints.
3247 // return 'true' if register list contains non-low GPR registers,
3248 // 'false' otherwise. If Reg is in the register list or is HiReg, set
3249 // 'containsReg' to true.
3250 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
3251 unsigned HiReg, bool &containsReg) {
3252 containsReg = false;
3253 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
3254 unsigned OpReg = Inst.getOperand(i).getReg();
3257 // Anything other than a low register isn't legal here.
3258 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
3264 // FIXME: We would really like to be able to tablegen'erate this.
3266 validateInstruction(MCInst &Inst,
3267 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3268 switch (Inst.getOpcode()) {
3271 case ARM::LDRD_POST:
3273 // Rt2 must be Rt + 1.
3274 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3275 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3277 return Error(Operands[3]->getStartLoc(),
3278 "destination operands must be sequential");
3282 // Rt2 must be Rt + 1.
3283 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3284 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3286 return Error(Operands[3]->getStartLoc(),
3287 "source operands must be sequential");
3291 case ARM::STRD_POST:
3293 // Rt2 must be Rt + 1.
3294 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3295 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3297 return Error(Operands[3]->getStartLoc(),
3298 "source operands must be sequential");
3303 // width must be in range [1, 32-lsb]
3304 unsigned lsb = Inst.getOperand(2).getImm();
3305 unsigned widthm1 = Inst.getOperand(3).getImm();
3306 if (widthm1 >= 32 - lsb)
3307 return Error(Operands[5]->getStartLoc(),
3308 "bitfield width must be in range [1,32-lsb]");
3312 // Thumb LDM instructions are writeback iff the base register is not
3313 // in the register list.
3314 unsigned Rn = Inst.getOperand(0).getReg();
3315 bool hasWritebackToken =
3316 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
3317 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
3318 bool listContainsBase;
3319 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase))
3320 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
3321 "registers must be in range r0-r7");
3322 // If we should have writeback, then there should be a '!' token.
3323 if (!listContainsBase && !hasWritebackToken)
3324 return Error(Operands[2]->getStartLoc(),
3325 "writeback operator '!' expected");
3326 // Likewise, if we should not have writeback, there must not be a '!'
3327 if (listContainsBase && hasWritebackToken)
3328 return Error(Operands[3]->getStartLoc(),
3329 "writeback operator '!' not allowed when base register "
3330 "in register list");
3335 bool listContainsBase;
3336 if (checkLowRegisterList(Inst, 3, 0, ARM::PC, listContainsBase))
3337 return Error(Operands[2]->getStartLoc(),
3338 "registers must be in range r0-r7 or pc");
3342 bool listContainsBase;
3343 if (checkLowRegisterList(Inst, 3, 0, ARM::LR, listContainsBase))
3344 return Error(Operands[2]->getStartLoc(),
3345 "registers must be in range r0-r7 or lr");
3348 case ARM::tSTMIA_UPD: {
3349 bool listContainsBase;
3350 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase))
3351 return Error(Operands[4]->getStartLoc(),
3352 "registers must be in range r0-r7");
3361 processInstruction(MCInst &Inst,
3362 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3363 switch (Inst.getOpcode()) {
3364 case ARM::LDMIA_UPD:
3365 // If this is a load of a single register via a 'pop', then we should use
3366 // a post-indexed LDR instruction instead, per the ARM ARM.
3367 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3368 Inst.getNumOperands() == 5) {
3370 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3371 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3372 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3373 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3374 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3375 TmpInst.addOperand(MCOperand::CreateImm(4));
3376 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3377 TmpInst.addOperand(Inst.getOperand(3));
3381 case ARM::STMDB_UPD:
3382 // If this is a store of a single register via a 'push', then we should use
3383 // a pre-indexed STR instruction instead, per the ARM ARM.
3384 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3385 Inst.getNumOperands() == 5) {
3387 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3388 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3389 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3390 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3391 TmpInst.addOperand(MCOperand::CreateImm(-4));
3392 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3393 TmpInst.addOperand(Inst.getOperand(3));
3398 // If the immediate is in the range 0-7, we really wanted tADDi3.
3399 if (Inst.getOperand(3).getImm() < 8)
3400 Inst.setOpcode(ARM::tADDi3);
3403 // If the conditional is AL, we really want tB.
3404 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3405 Inst.setOpcode(ARM::tB);
3408 // The mask bits for all but the first condition are represented as
3409 // the low bit of the condition code value implies 't'. We currently
3410 // always have 1 implies 't', so XOR toggle the bits if the low bit
3411 // of the condition code is zero. The encoding also expects the low
3412 // bit of the condition to be encoded as bit 4 of the mask operand,
3413 // so mask that in if needed
3414 MCOperand &MO = Inst.getOperand(1);
3415 unsigned Mask = MO.getImm();
3416 if ((Inst.getOperand(0).getImm() & 1) == 0) {
3417 unsigned TZ = CountTrailingZeros_32(Mask);
3418 assert(Mask && TZ <= 3 && "illegal IT mask value!");
3419 for (unsigned i = 3; i != TZ; --i)
3429 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3430 // the ARMInsts array) instead. Getting that here requires awkward
3431 // API changes, though. Better way?
3433 extern MCInstrDesc ARMInsts[];
3435 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3436 return ARMInsts[Opcode];
3439 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3440 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3441 // suffix depending on whether they're in an IT block or not.
3442 unsigned Opc = Inst.getOpcode();
3443 MCInstrDesc &MCID = getInstDesc(Opc);
3444 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3445 assert(MCID.hasOptionalDef() &&
3446 "optionally flag setting instruction missing optional def operand");
3447 assert(MCID.NumOperands == Inst.getNumOperands() &&
3448 "operand count mismatch!");
3449 // Find the optional-def operand (cc_out).
3452 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3455 // If we're parsing Thumb1, reject it completely.
3456 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3457 return Match_MnemonicFail;
3458 // If we're parsing Thumb2, which form is legal depends on whether we're
3460 // FIXME: We don't yet do IT blocks, so just always consider it to be
3461 // that we aren't in one until we do.
3462 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3463 return Match_RequiresITBlock;
3465 // Some high-register supporting Thumb1 encodings only allow both registers
3466 // to be from r0-r7 when in Thumb2.
3467 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3468 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3469 isARMLowRegister(Inst.getOperand(2).getReg()))
3470 return Match_RequiresThumb2;
3471 // Others only require ARMv6 or later.
3472 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
3473 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3474 isARMLowRegister(Inst.getOperand(1).getReg()))
3475 return Match_RequiresV6;
3476 return Match_Success;
3480 MatchAndEmitInstruction(SMLoc IDLoc,
3481 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3485 unsigned MatchResult;
3486 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3487 switch (MatchResult) {
3490 // Context sensitive operand constraints aren't handled by the matcher,
3491 // so check them here.
3492 if (validateInstruction(Inst, Operands))
3495 // Some instructions need post-processing to, for example, tweak which
3496 // encoding is selected.
3497 processInstruction(Inst, Operands);
3499 Out.EmitInstruction(Inst);
3501 case Match_MissingFeature:
3502 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3504 case Match_InvalidOperand: {
3505 SMLoc ErrorLoc = IDLoc;
3506 if (ErrorInfo != ~0U) {
3507 if (ErrorInfo >= Operands.size())
3508 return Error(IDLoc, "too few operands for instruction");
3510 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3511 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3514 return Error(ErrorLoc, "invalid operand for instruction");
3516 case Match_MnemonicFail:
3517 return Error(IDLoc, "invalid instruction");
3518 case Match_ConversionFail:
3519 // The converter function will have already emited a diagnostic.
3521 case Match_RequiresITBlock:
3522 return Error(IDLoc, "instruction only valid inside IT block");
3523 case Match_RequiresV6:
3524 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3525 case Match_RequiresThumb2:
3526 return Error(IDLoc, "instruction variant requires Thumb2");
3529 llvm_unreachable("Implement any new match types added!");
3533 /// parseDirective parses the arm specific directives
3534 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3535 StringRef IDVal = DirectiveID.getIdentifier();
3536 if (IDVal == ".word")
3537 return parseDirectiveWord(4, DirectiveID.getLoc());
3538 else if (IDVal == ".thumb")
3539 return parseDirectiveThumb(DirectiveID.getLoc());
3540 else if (IDVal == ".thumb_func")
3541 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3542 else if (IDVal == ".code")
3543 return parseDirectiveCode(DirectiveID.getLoc());
3544 else if (IDVal == ".syntax")
3545 return parseDirectiveSyntax(DirectiveID.getLoc());
3549 /// parseDirectiveWord
3550 /// ::= .word [ expression (, expression)* ]
3551 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3552 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3554 const MCExpr *Value;
3555 if (getParser().ParseExpression(Value))
3558 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3560 if (getLexer().is(AsmToken::EndOfStatement))
3563 // FIXME: Improve diagnostic.
3564 if (getLexer().isNot(AsmToken::Comma))
3565 return Error(L, "unexpected token in directive");
3574 /// parseDirectiveThumb
3576 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3577 if (getLexer().isNot(AsmToken::EndOfStatement))
3578 return Error(L, "unexpected token in directive");
3581 // TODO: set thumb mode
3582 // TODO: tell the MC streamer the mode
3583 // getParser().getStreamer().Emit???();
3587 /// parseDirectiveThumbFunc
3588 /// ::= .thumbfunc symbol_name
3589 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3590 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3591 bool isMachO = MAI.hasSubsectionsViaSymbols();
3594 // Darwin asm has function name after .thumb_func direction
3597 const AsmToken &Tok = Parser.getTok();
3598 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3599 return Error(L, "unexpected token in .thumb_func directive");
3600 Name = Tok.getString();
3601 Parser.Lex(); // Consume the identifier token.
3604 if (getLexer().isNot(AsmToken::EndOfStatement))
3605 return Error(L, "unexpected token in directive");
3608 // FIXME: assuming function name will be the line following .thumb_func
3610 Name = Parser.getTok().getString();
3613 // Mark symbol as a thumb symbol.
3614 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3615 getParser().getStreamer().EmitThumbFunc(Func);
3619 /// parseDirectiveSyntax
3620 /// ::= .syntax unified | divided
3621 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3622 const AsmToken &Tok = Parser.getTok();
3623 if (Tok.isNot(AsmToken::Identifier))
3624 return Error(L, "unexpected token in .syntax directive");
3625 StringRef Mode = Tok.getString();
3626 if (Mode == "unified" || Mode == "UNIFIED")
3628 else if (Mode == "divided" || Mode == "DIVIDED")
3629 return Error(L, "'.syntax divided' arm asssembly not supported");
3631 return Error(L, "unrecognized syntax mode in .syntax directive");
3633 if (getLexer().isNot(AsmToken::EndOfStatement))
3634 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3637 // TODO tell the MC streamer the mode
3638 // getParser().getStreamer().Emit???();
3642 /// parseDirectiveCode
3643 /// ::= .code 16 | 32
3644 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3645 const AsmToken &Tok = Parser.getTok();
3646 if (Tok.isNot(AsmToken::Integer))
3647 return Error(L, "unexpected token in .code directive");
3648 int64_t Val = Parser.getTok().getIntVal();
3654 return Error(L, "invalid operand to .code directive");
3656 if (getLexer().isNot(AsmToken::EndOfStatement))
3657 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3663 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3668 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3675 extern "C" void LLVMInitializeARMAsmLexer();
3677 /// Force static initialization.
3678 extern "C" void LLVMInitializeARMAsmParser() {
3679 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3680 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3681 LLVMInitializeARMAsmLexer();
3684 #define GET_REGISTER_MATCHER
3685 #define GET_MATCHER_IMPLEMENTATION
3686 #include "ARMGenAsmMatcher.inc"