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);
643 bool isMemRegOffset() const {
644 if (Kind != Memory || !Mem.OffsetRegNum)
648 bool isMemThumbRR() const {
649 // Thumb reg+reg addressing is simple. Just two registers, a base and
650 // an offset. No shifts, negations or any other complicating factors.
651 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
652 Mem.ShiftType != ARM_AM::no_shift)
654 return isARMLowRegister(Mem.BaseRegNum) &&
655 (!Mem.OffsetRegNum || isARMLowRegister(Mem.OffsetRegNum));
657 bool isMemThumbRIs4() const {
658 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
659 !isARMLowRegister(Mem.BaseRegNum))
661 // Immediate offset, multiple of 4 in range [0, 124].
662 if (!Mem.OffsetImm) return true;
663 int64_t Val = Mem.OffsetImm->getValue();
664 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
666 bool isMemThumbRIs2() const {
667 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
668 !isARMLowRegister(Mem.BaseRegNum))
670 // Immediate offset, multiple of 4 in range [0, 62].
671 if (!Mem.OffsetImm) return true;
672 int64_t Val = Mem.OffsetImm->getValue();
673 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
675 bool isMemThumbRIs1() const {
676 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
677 !isARMLowRegister(Mem.BaseRegNum))
679 // Immediate offset in range [0, 31].
680 if (!Mem.OffsetImm) return true;
681 int64_t Val = Mem.OffsetImm->getValue();
682 return Val >= 0 && Val <= 31;
684 bool isMemThumbSPI() const {
685 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
687 // Immediate offset, multiple of 4 in range [0, 1020].
688 if (!Mem.OffsetImm) return true;
689 int64_t Val = Mem.OffsetImm->getValue();
690 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
692 bool isMemImm8Offset() const {
693 if (Kind != Memory || Mem.OffsetRegNum != 0)
695 // Immediate offset in range [-255, 255].
696 if (!Mem.OffsetImm) return true;
697 int64_t Val = Mem.OffsetImm->getValue();
698 return Val > -256 && Val < 256;
700 bool isMemImm12Offset() const {
701 // If we have an immediate that's not a constant, treat it as a label
702 // reference needing a fixup. If it is a constant, it's something else
704 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
707 if (Kind != Memory || Mem.OffsetRegNum != 0)
709 // Immediate offset in range [-4095, 4095].
710 if (!Mem.OffsetImm) return true;
711 int64_t Val = Mem.OffsetImm->getValue();
712 return Val > -4096 && Val < 4096;
714 bool isPostIdxImm8() const {
715 if (Kind != Immediate)
717 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
718 if (!CE) return false;
719 int64_t Val = CE->getValue();
720 return Val > -256 && Val < 256;
723 bool isMSRMask() const { return Kind == MSRMask; }
724 bool isProcIFlags() const { return Kind == ProcIFlags; }
726 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
727 // Add as immediates when possible. Null MCExpr = 0.
729 Inst.addOperand(MCOperand::CreateImm(0));
730 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
731 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
733 Inst.addOperand(MCOperand::CreateExpr(Expr));
736 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
737 assert(N == 2 && "Invalid number of operands!");
738 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
739 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
740 Inst.addOperand(MCOperand::CreateReg(RegNum));
743 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
744 assert(N == 1 && "Invalid number of operands!");
745 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
748 void addITMaskOperands(MCInst &Inst, unsigned N) const {
749 assert(N == 1 && "Invalid number of operands!");
750 Inst.addOperand(MCOperand::CreateImm(ITMask.Mask));
753 void addITCondCodeOperands(MCInst &Inst, unsigned N) const {
754 assert(N == 1 && "Invalid number of operands!");
755 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
758 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
759 assert(N == 1 && "Invalid number of operands!");
760 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
763 void addCCOutOperands(MCInst &Inst, unsigned N) const {
764 assert(N == 1 && "Invalid number of operands!");
765 Inst.addOperand(MCOperand::CreateReg(getReg()));
768 void addRegOperands(MCInst &Inst, unsigned N) const {
769 assert(N == 1 && "Invalid number of operands!");
770 Inst.addOperand(MCOperand::CreateReg(getReg()));
773 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
774 assert(N == 3 && "Invalid number of operands!");
775 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
776 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
777 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
778 Inst.addOperand(MCOperand::CreateImm(
779 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
782 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
783 assert(N == 2 && "Invalid number of operands!");
784 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
785 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
786 Inst.addOperand(MCOperand::CreateImm(
787 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
791 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
792 assert(N == 1 && "Invalid number of operands!");
793 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
797 void addRegListOperands(MCInst &Inst, unsigned N) const {
798 assert(N == 1 && "Invalid number of operands!");
799 const SmallVectorImpl<unsigned> &RegList = getRegList();
800 for (SmallVectorImpl<unsigned>::const_iterator
801 I = RegList.begin(), E = RegList.end(); I != E; ++I)
802 Inst.addOperand(MCOperand::CreateReg(*I));
805 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
806 addRegListOperands(Inst, N);
809 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
810 addRegListOperands(Inst, N);
813 void addRotImmOperands(MCInst &Inst, unsigned N) const {
814 assert(N == 1 && "Invalid number of operands!");
815 // Encoded as val>>3. The printer handles display as 8, 16, 24.
816 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
819 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
820 assert(N == 1 && "Invalid number of operands!");
821 // Munge the lsb/width into a bitfield mask.
822 unsigned lsb = Bitfield.LSB;
823 unsigned width = Bitfield.Width;
824 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
825 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
826 (32 - (lsb + width)));
827 Inst.addOperand(MCOperand::CreateImm(Mask));
830 void addImmOperands(MCInst &Inst, unsigned N) const {
831 assert(N == 1 && "Invalid number of operands!");
832 addExpr(Inst, getImm());
835 void addImm0_1020s4Operands(MCInst &Inst, unsigned N) const {
836 assert(N == 1 && "Invalid number of operands!");
837 // The immediate is scaled by four in the encoding and is stored
838 // in the MCInst as such. Lop off the low two bits here.
839 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
840 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
843 void addImm0_508s4Operands(MCInst &Inst, unsigned N) const {
844 assert(N == 1 && "Invalid number of operands!");
845 // The immediate is scaled by four in the encoding and is stored
846 // in the MCInst as such. Lop off the low two bits here.
847 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
848 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
851 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
852 assert(N == 1 && "Invalid number of operands!");
853 addExpr(Inst, getImm());
856 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
857 assert(N == 1 && "Invalid number of operands!");
858 addExpr(Inst, getImm());
861 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
862 assert(N == 1 && "Invalid number of operands!");
863 addExpr(Inst, getImm());
866 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
867 assert(N == 1 && "Invalid number of operands!");
868 addExpr(Inst, getImm());
871 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
872 assert(N == 1 && "Invalid number of operands!");
873 // The constant encodes as the immediate-1, and we store in the instruction
874 // the bits as encoded, so subtract off one here.
875 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
876 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
879 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
880 assert(N == 1 && "Invalid number of operands!");
881 // The constant encodes as the immediate-1, and we store in the instruction
882 // the bits as encoded, so subtract off one here.
883 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
884 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
887 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
888 assert(N == 1 && "Invalid number of operands!");
889 addExpr(Inst, getImm());
892 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
893 assert(N == 1 && "Invalid number of operands!");
894 addExpr(Inst, getImm());
897 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
898 assert(N == 1 && "Invalid number of operands!");
899 addExpr(Inst, getImm());
902 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
903 assert(N == 1 && "Invalid number of operands!");
904 // The constant encodes as the immediate, except for 32, which encodes as
906 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
907 unsigned Imm = CE->getValue();
908 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
911 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
912 assert(N == 1 && "Invalid number of operands!");
913 addExpr(Inst, getImm());
916 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
917 assert(N == 1 && "Invalid number of operands!");
918 // An ASR value of 32 encodes as 0, so that's how we want to add it to
919 // the instruction as well.
920 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
921 int Val = CE->getValue();
922 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
925 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
926 assert(N == 1 && "Invalid number of operands!");
927 addExpr(Inst, getImm());
930 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
931 assert(N == 1 && "Invalid number of operands!");
932 addExpr(Inst, getImm());
935 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
936 assert(N == 1 && "Invalid number of operands!");
937 addExpr(Inst, getImm());
940 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
941 assert(N == 1 && "Invalid number of operands!");
942 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
945 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
946 assert(N == 1 && "Invalid number of operands!");
947 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
950 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
951 assert(N == 3 && "Invalid number of operands!");
952 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
953 if (!Mem.OffsetRegNum) {
954 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
955 // Special case for #-0
956 if (Val == INT32_MIN) Val = 0;
957 if (Val < 0) Val = -Val;
958 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
960 // For register offset, we encode the shift type and negation flag
962 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
963 Mem.ShiftImm, Mem.ShiftType);
965 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
966 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
967 Inst.addOperand(MCOperand::CreateImm(Val));
970 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
971 assert(N == 2 && "Invalid number of operands!");
972 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
973 assert(CE && "non-constant AM2OffsetImm operand!");
974 int32_t Val = CE->getValue();
975 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
976 // Special case for #-0
977 if (Val == INT32_MIN) Val = 0;
978 if (Val < 0) Val = -Val;
979 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
980 Inst.addOperand(MCOperand::CreateReg(0));
981 Inst.addOperand(MCOperand::CreateImm(Val));
984 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
985 assert(N == 3 && "Invalid number of operands!");
986 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
987 if (!Mem.OffsetRegNum) {
988 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
989 // Special case for #-0
990 if (Val == INT32_MIN) Val = 0;
991 if (Val < 0) Val = -Val;
992 Val = ARM_AM::getAM3Opc(AddSub, Val);
994 // For register offset, we encode the shift type and negation flag
996 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
998 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
999 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1000 Inst.addOperand(MCOperand::CreateImm(Val));
1003 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
1004 assert(N == 2 && "Invalid number of operands!");
1005 if (Kind == PostIndexRegister) {
1007 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
1008 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1009 Inst.addOperand(MCOperand::CreateImm(Val));
1014 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
1015 int32_t Val = CE->getValue();
1016 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1017 // Special case for #-0
1018 if (Val == INT32_MIN) Val = 0;
1019 if (Val < 0) Val = -Val;
1020 Val = ARM_AM::getAM3Opc(AddSub, Val);
1021 Inst.addOperand(MCOperand::CreateReg(0));
1022 Inst.addOperand(MCOperand::CreateImm(Val));
1025 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
1026 assert(N == 2 && "Invalid number of operands!");
1027 // The lower two bits are always zero and as such are not encoded.
1028 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
1029 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1030 // Special case for #-0
1031 if (Val == INT32_MIN) Val = 0;
1032 if (Val < 0) Val = -Val;
1033 Val = ARM_AM::getAM5Opc(AddSub, Val);
1034 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1035 Inst.addOperand(MCOperand::CreateImm(Val));
1038 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1039 assert(N == 2 && "Invalid number of operands!");
1040 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1041 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1042 Inst.addOperand(MCOperand::CreateImm(Val));
1045 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1046 assert(N == 2 && "Invalid number of operands!");
1047 // If this is an immediate, it's a label reference.
1048 if (Kind == Immediate) {
1049 addExpr(Inst, getImm());
1050 Inst.addOperand(MCOperand::CreateImm(0));
1054 // Otherwise, it's a normal memory reg+offset.
1055 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1056 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1057 Inst.addOperand(MCOperand::CreateImm(Val));
1060 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1061 assert(N == 3 && "Invalid number of operands!");
1062 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1063 Mem.ShiftImm, Mem.ShiftType);
1064 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1065 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1066 Inst.addOperand(MCOperand::CreateImm(Val));
1069 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1070 assert(N == 2 && "Invalid number of operands!");
1071 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1072 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1075 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1076 assert(N == 2 && "Invalid number of operands!");
1077 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1078 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1079 Inst.addOperand(MCOperand::CreateImm(Val));
1082 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1083 assert(N == 2 && "Invalid number of operands!");
1084 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 2) : 0;
1085 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1086 Inst.addOperand(MCOperand::CreateImm(Val));
1089 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1090 assert(N == 2 && "Invalid number of operands!");
1091 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue()) : 0;
1092 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1093 Inst.addOperand(MCOperand::CreateImm(Val));
1096 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1097 assert(N == 2 && "Invalid number of operands!");
1098 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1099 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1100 Inst.addOperand(MCOperand::CreateImm(Val));
1103 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1104 assert(N == 1 && "Invalid number of operands!");
1105 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1106 assert(CE && "non-constant post-idx-imm8 operand!");
1107 int Imm = CE->getValue();
1108 bool isAdd = Imm >= 0;
1109 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1110 Inst.addOperand(MCOperand::CreateImm(Imm));
1113 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1114 assert(N == 2 && "Invalid number of operands!");
1115 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1116 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1119 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1120 assert(N == 2 && "Invalid number of operands!");
1121 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1122 // The sign, shift type, and shift amount are encoded in a single operand
1123 // using the AM2 encoding helpers.
1124 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1125 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1126 PostIdxReg.ShiftTy);
1127 Inst.addOperand(MCOperand::CreateImm(Imm));
1130 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1131 assert(N == 1 && "Invalid number of operands!");
1132 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1135 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1136 assert(N == 1 && "Invalid number of operands!");
1137 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1140 virtual void print(raw_ostream &OS) const;
1142 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1143 ARMOperand *Op = new ARMOperand(ITCondMask);
1144 Op->ITMask.Mask = Mask;
1150 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1151 ARMOperand *Op = new ARMOperand(CondCode);
1158 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1159 ARMOperand *Op = new ARMOperand(CoprocNum);
1160 Op->Cop.Val = CopVal;
1166 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1167 ARMOperand *Op = new ARMOperand(CoprocReg);
1168 Op->Cop.Val = CopVal;
1174 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1175 ARMOperand *Op = new ARMOperand(CCOut);
1176 Op->Reg.RegNum = RegNum;
1182 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1183 ARMOperand *Op = new ARMOperand(Token);
1184 Op->Tok.Data = Str.data();
1185 Op->Tok.Length = Str.size();
1191 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1192 ARMOperand *Op = new ARMOperand(Register);
1193 Op->Reg.RegNum = RegNum;
1199 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1204 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1205 Op->RegShiftedReg.ShiftTy = ShTy;
1206 Op->RegShiftedReg.SrcReg = SrcReg;
1207 Op->RegShiftedReg.ShiftReg = ShiftReg;
1208 Op->RegShiftedReg.ShiftImm = ShiftImm;
1214 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1218 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1219 Op->RegShiftedImm.ShiftTy = ShTy;
1220 Op->RegShiftedImm.SrcReg = SrcReg;
1221 Op->RegShiftedImm.ShiftImm = ShiftImm;
1227 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1229 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1230 Op->ShifterImm.isASR = isASR;
1231 Op->ShifterImm.Imm = Imm;
1237 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1238 ARMOperand *Op = new ARMOperand(RotateImmediate);
1239 Op->RotImm.Imm = Imm;
1245 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1247 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1248 Op->Bitfield.LSB = LSB;
1249 Op->Bitfield.Width = Width;
1256 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1257 SMLoc StartLoc, SMLoc EndLoc) {
1258 KindTy Kind = RegisterList;
1260 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1261 contains(Regs.front().first))
1262 Kind = DPRRegisterList;
1263 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1264 contains(Regs.front().first))
1265 Kind = SPRRegisterList;
1267 ARMOperand *Op = new ARMOperand(Kind);
1268 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1269 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1270 Op->Registers.push_back(I->first);
1271 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1272 Op->StartLoc = StartLoc;
1273 Op->EndLoc = EndLoc;
1277 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1278 ARMOperand *Op = new ARMOperand(Immediate);
1285 static ARMOperand *CreateMem(unsigned BaseRegNum,
1286 const MCConstantExpr *OffsetImm,
1287 unsigned OffsetRegNum,
1288 ARM_AM::ShiftOpc ShiftType,
1292 ARMOperand *Op = new ARMOperand(Memory);
1293 Op->Mem.BaseRegNum = BaseRegNum;
1294 Op->Mem.OffsetImm = OffsetImm;
1295 Op->Mem.OffsetRegNum = OffsetRegNum;
1296 Op->Mem.ShiftType = ShiftType;
1297 Op->Mem.ShiftImm = ShiftImm;
1298 Op->Mem.isNegative = isNegative;
1304 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1305 ARM_AM::ShiftOpc ShiftTy,
1308 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1309 Op->PostIdxReg.RegNum = RegNum;
1310 Op->PostIdxReg.isAdd = isAdd;
1311 Op->PostIdxReg.ShiftTy = ShiftTy;
1312 Op->PostIdxReg.ShiftImm = ShiftImm;
1318 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1319 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1320 Op->MBOpt.Val = Opt;
1326 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1327 ARMOperand *Op = new ARMOperand(ProcIFlags);
1328 Op->IFlags.Val = IFlags;
1334 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1335 ARMOperand *Op = new ARMOperand(MSRMask);
1336 Op->MMask.Val = MMask;
1343 } // end anonymous namespace.
1345 void ARMOperand::print(raw_ostream &OS) const {
1348 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1351 OS << "<ccout " << getReg() << ">";
1354 static char MaskStr[][6] = { "()", "(t)", "(e)", "(tt)", "(et)", "(te)",
1355 "(ee)", "(ttt)", "(ett)", "(tet)", "(eet)", "(tte)", "(ete)",
1357 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1358 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1362 OS << "<coprocessor number: " << getCoproc() << ">";
1365 OS << "<coprocessor register: " << getCoproc() << ">";
1368 OS << "<mask: " << getMSRMask() << ">";
1371 getImm()->print(OS);
1374 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1378 << " base:" << Mem.BaseRegNum;
1381 case PostIndexRegister:
1382 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1383 << PostIdxReg.RegNum;
1384 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1385 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1386 << PostIdxReg.ShiftImm;
1390 OS << "<ARM_PROC::";
1391 unsigned IFlags = getProcIFlags();
1392 for (int i=2; i >= 0; --i)
1393 if (IFlags & (1 << i))
1394 OS << ARM_PROC::IFlagsToString(1 << i);
1399 OS << "<register " << getReg() << ">";
1401 case ShifterImmediate:
1402 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1403 << " #" << ShifterImm.Imm << ">";
1405 case ShiftedRegister:
1406 OS << "<so_reg_reg "
1407 << RegShiftedReg.SrcReg
1408 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1409 << ", " << RegShiftedReg.ShiftReg << ", "
1410 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1413 case ShiftedImmediate:
1414 OS << "<so_reg_imm "
1415 << RegShiftedImm.SrcReg
1416 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1417 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1420 case RotateImmediate:
1421 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1423 case BitfieldDescriptor:
1424 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1425 << ", width: " << Bitfield.Width << ">";
1428 case DPRRegisterList:
1429 case SPRRegisterList: {
1430 OS << "<register_list ";
1432 const SmallVectorImpl<unsigned> &RegList = getRegList();
1433 for (SmallVectorImpl<unsigned>::const_iterator
1434 I = RegList.begin(), E = RegList.end(); I != E; ) {
1436 if (++I < E) OS << ", ";
1443 OS << "'" << getToken() << "'";
1448 /// @name Auto-generated Match Functions
1451 static unsigned MatchRegisterName(StringRef Name);
1455 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1456 SMLoc &StartLoc, SMLoc &EndLoc) {
1457 RegNo = tryParseRegister();
1459 return (RegNo == (unsigned)-1);
1462 /// Try to parse a register name. The token must be an Identifier when called,
1463 /// and if it is a register name the token is eaten and the register number is
1464 /// returned. Otherwise return -1.
1466 int ARMAsmParser::tryParseRegister() {
1467 const AsmToken &Tok = Parser.getTok();
1468 if (Tok.isNot(AsmToken::Identifier)) return -1;
1470 // FIXME: Validate register for the current architecture; we have to do
1471 // validation later, so maybe there is no need for this here.
1472 std::string upperCase = Tok.getString().str();
1473 std::string lowerCase = LowercaseString(upperCase);
1474 unsigned RegNum = MatchRegisterName(lowerCase);
1476 RegNum = StringSwitch<unsigned>(lowerCase)
1477 .Case("r13", ARM::SP)
1478 .Case("r14", ARM::LR)
1479 .Case("r15", ARM::PC)
1480 .Case("ip", ARM::R12)
1483 if (!RegNum) return -1;
1485 Parser.Lex(); // Eat identifier token.
1489 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1490 // If a recoverable error occurs, return 1. If an irrecoverable error
1491 // occurs, return -1. An irrecoverable error is one where tokens have been
1492 // consumed in the process of trying to parse the shifter (i.e., when it is
1493 // indeed a shifter operand, but malformed).
1494 int ARMAsmParser::tryParseShiftRegister(
1495 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1496 SMLoc S = Parser.getTok().getLoc();
1497 const AsmToken &Tok = Parser.getTok();
1498 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1500 std::string upperCase = Tok.getString().str();
1501 std::string lowerCase = LowercaseString(upperCase);
1502 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1503 .Case("lsl", ARM_AM::lsl)
1504 .Case("lsr", ARM_AM::lsr)
1505 .Case("asr", ARM_AM::asr)
1506 .Case("ror", ARM_AM::ror)
1507 .Case("rrx", ARM_AM::rrx)
1508 .Default(ARM_AM::no_shift);
1510 if (ShiftTy == ARM_AM::no_shift)
1513 Parser.Lex(); // Eat the operator.
1515 // The source register for the shift has already been added to the
1516 // operand list, so we need to pop it off and combine it into the shifted
1517 // register operand instead.
1518 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1519 if (!PrevOp->isReg())
1520 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1521 int SrcReg = PrevOp->getReg();
1524 if (ShiftTy == ARM_AM::rrx) {
1525 // RRX Doesn't have an explicit shift amount. The encoder expects
1526 // the shift register to be the same as the source register. Seems odd,
1530 // Figure out if this is shifted by a constant or a register (for non-RRX).
1531 if (Parser.getTok().is(AsmToken::Hash)) {
1532 Parser.Lex(); // Eat hash.
1533 SMLoc ImmLoc = Parser.getTok().getLoc();
1534 const MCExpr *ShiftExpr = 0;
1535 if (getParser().ParseExpression(ShiftExpr)) {
1536 Error(ImmLoc, "invalid immediate shift value");
1539 // The expression must be evaluatable as an immediate.
1540 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1542 Error(ImmLoc, "invalid immediate shift value");
1545 // Range check the immediate.
1546 // lsl, ror: 0 <= imm <= 31
1547 // lsr, asr: 0 <= imm <= 32
1548 Imm = CE->getValue();
1550 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1551 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1552 Error(ImmLoc, "immediate shift value out of range");
1555 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1556 ShiftReg = tryParseRegister();
1557 SMLoc L = Parser.getTok().getLoc();
1558 if (ShiftReg == -1) {
1559 Error (L, "expected immediate or register in shift operand");
1563 Error (Parser.getTok().getLoc(),
1564 "expected immediate or register in shift operand");
1569 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1570 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1572 S, Parser.getTok().getLoc()));
1574 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1575 S, Parser.getTok().getLoc()));
1581 /// Try to parse a register name. The token must be an Identifier when called.
1582 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1583 /// if there is a "writeback". 'true' if it's not a register.
1585 /// TODO this is likely to change to allow different register types and or to
1586 /// parse for a specific register type.
1588 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1589 SMLoc S = Parser.getTok().getLoc();
1590 int RegNo = tryParseRegister();
1594 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1596 const AsmToken &ExclaimTok = Parser.getTok();
1597 if (ExclaimTok.is(AsmToken::Exclaim)) {
1598 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1599 ExclaimTok.getLoc()));
1600 Parser.Lex(); // Eat exclaim token
1606 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1607 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1609 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1610 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1612 switch (Name.size()) {
1615 if (Name[0] != CoprocOp)
1632 if (Name[0] != CoprocOp || Name[1] != '1')
1636 case '0': return 10;
1637 case '1': return 11;
1638 case '2': return 12;
1639 case '3': return 13;
1640 case '4': return 14;
1641 case '5': return 15;
1649 /// parseITCondCode - Try to parse a condition code for an IT instruction.
1650 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1651 parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1652 SMLoc S = Parser.getTok().getLoc();
1653 const AsmToken &Tok = Parser.getTok();
1654 if (!Tok.is(AsmToken::Identifier))
1655 return MatchOperand_NoMatch;
1656 unsigned CC = StringSwitch<unsigned>(Tok.getString())
1657 .Case("eq", ARMCC::EQ)
1658 .Case("ne", ARMCC::NE)
1659 .Case("hs", ARMCC::HS)
1660 .Case("cs", ARMCC::HS)
1661 .Case("lo", ARMCC::LO)
1662 .Case("cc", ARMCC::LO)
1663 .Case("mi", ARMCC::MI)
1664 .Case("pl", ARMCC::PL)
1665 .Case("vs", ARMCC::VS)
1666 .Case("vc", ARMCC::VC)
1667 .Case("hi", ARMCC::HI)
1668 .Case("ls", ARMCC::LS)
1669 .Case("ge", ARMCC::GE)
1670 .Case("lt", ARMCC::LT)
1671 .Case("gt", ARMCC::GT)
1672 .Case("le", ARMCC::LE)
1673 .Case("al", ARMCC::AL)
1676 return MatchOperand_NoMatch;
1677 Parser.Lex(); // Eat the token.
1679 Operands.push_back(ARMOperand::CreateCondCode(ARMCC::CondCodes(CC), S));
1681 return MatchOperand_Success;
1684 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1685 /// token must be an Identifier when called, and if it is a coprocessor
1686 /// number, the token is eaten and the operand is added to the operand list.
1687 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1688 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1689 SMLoc S = Parser.getTok().getLoc();
1690 const AsmToken &Tok = Parser.getTok();
1691 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1693 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1695 return MatchOperand_NoMatch;
1697 Parser.Lex(); // Eat identifier token.
1698 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1699 return MatchOperand_Success;
1702 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1703 /// token must be an Identifier when called, and if it is a coprocessor
1704 /// number, the token is eaten and the operand is added to the operand list.
1705 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1706 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1707 SMLoc S = Parser.getTok().getLoc();
1708 const AsmToken &Tok = Parser.getTok();
1709 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1711 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1713 return MatchOperand_NoMatch;
1715 Parser.Lex(); // Eat identifier token.
1716 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1717 return MatchOperand_Success;
1720 /// Parse a register list, return it if successful else return null. The first
1721 /// token must be a '{' when called.
1723 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1724 assert(Parser.getTok().is(AsmToken::LCurly) &&
1725 "Token is not a Left Curly Brace");
1726 SMLoc S = Parser.getTok().getLoc();
1728 // Read the rest of the registers in the list.
1729 unsigned PrevRegNum = 0;
1730 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1733 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1734 Parser.Lex(); // Eat non-identifier token.
1736 const AsmToken &RegTok = Parser.getTok();
1737 SMLoc RegLoc = RegTok.getLoc();
1738 if (RegTok.isNot(AsmToken::Identifier)) {
1739 Error(RegLoc, "register expected");
1743 int RegNum = tryParseRegister();
1745 Error(RegLoc, "register expected");
1750 int Reg = PrevRegNum;
1753 Registers.push_back(std::make_pair(Reg, RegLoc));
1754 } while (Reg != RegNum);
1756 Registers.push_back(std::make_pair(RegNum, RegLoc));
1759 PrevRegNum = RegNum;
1760 } while (Parser.getTok().is(AsmToken::Comma) ||
1761 Parser.getTok().is(AsmToken::Minus));
1763 // Process the right curly brace of the list.
1764 const AsmToken &RCurlyTok = Parser.getTok();
1765 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1766 Error(RCurlyTok.getLoc(), "'}' expected");
1770 SMLoc E = RCurlyTok.getLoc();
1771 Parser.Lex(); // Eat right curly brace token.
1773 // Verify the register list.
1774 bool EmittedWarning = false;
1775 unsigned HighRegNum = 0;
1776 BitVector RegMap(32);
1777 for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
1778 const std::pair<unsigned, SMLoc> &RegInfo = Registers[i];
1779 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1782 Error(RegInfo.second, "register duplicated in register list");
1786 if (!EmittedWarning && Reg < HighRegNum)
1787 Warning(RegInfo.second,
1788 "register not in ascending order in register list");
1791 HighRegNum = std::max(Reg, HighRegNum);
1794 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1798 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1799 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1800 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1801 SMLoc S = Parser.getTok().getLoc();
1802 const AsmToken &Tok = Parser.getTok();
1803 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1804 StringRef OptStr = Tok.getString();
1806 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1807 .Case("sy", ARM_MB::SY)
1808 .Case("st", ARM_MB::ST)
1809 .Case("sh", ARM_MB::ISH)
1810 .Case("ish", ARM_MB::ISH)
1811 .Case("shst", ARM_MB::ISHST)
1812 .Case("ishst", ARM_MB::ISHST)
1813 .Case("nsh", ARM_MB::NSH)
1814 .Case("un", ARM_MB::NSH)
1815 .Case("nshst", ARM_MB::NSHST)
1816 .Case("unst", ARM_MB::NSHST)
1817 .Case("osh", ARM_MB::OSH)
1818 .Case("oshst", ARM_MB::OSHST)
1822 return MatchOperand_NoMatch;
1824 Parser.Lex(); // Eat identifier token.
1825 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1826 return MatchOperand_Success;
1829 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1830 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1831 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1832 SMLoc S = Parser.getTok().getLoc();
1833 const AsmToken &Tok = Parser.getTok();
1834 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1835 StringRef IFlagsStr = Tok.getString();
1837 unsigned IFlags = 0;
1838 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1839 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1840 .Case("a", ARM_PROC::A)
1841 .Case("i", ARM_PROC::I)
1842 .Case("f", ARM_PROC::F)
1845 // If some specific iflag is already set, it means that some letter is
1846 // present more than once, this is not acceptable.
1847 if (Flag == ~0U || (IFlags & Flag))
1848 return MatchOperand_NoMatch;
1853 Parser.Lex(); // Eat identifier token.
1854 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1855 return MatchOperand_Success;
1858 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1859 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1860 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1861 SMLoc S = Parser.getTok().getLoc();
1862 const AsmToken &Tok = Parser.getTok();
1863 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1864 StringRef Mask = Tok.getString();
1866 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1867 size_t Start = 0, Next = Mask.find('_');
1868 StringRef Flags = "";
1869 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1870 if (Next != StringRef::npos)
1871 Flags = Mask.slice(Next+1, Mask.size());
1873 // FlagsVal contains the complete mask:
1875 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1876 unsigned FlagsVal = 0;
1878 if (SpecReg == "apsr") {
1879 FlagsVal = StringSwitch<unsigned>(Flags)
1880 .Case("nzcvq", 0x8) // same as CPSR_f
1881 .Case("g", 0x4) // same as CPSR_s
1882 .Case("nzcvqg", 0xc) // same as CPSR_fs
1885 if (FlagsVal == ~0U) {
1887 return MatchOperand_NoMatch;
1889 FlagsVal = 0; // No flag
1891 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1892 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1894 for (int i = 0, e = Flags.size(); i != e; ++i) {
1895 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1902 // If some specific flag is already set, it means that some letter is
1903 // present more than once, this is not acceptable.
1904 if (FlagsVal == ~0U || (FlagsVal & Flag))
1905 return MatchOperand_NoMatch;
1908 } else // No match for special register.
1909 return MatchOperand_NoMatch;
1911 // Special register without flags are equivalent to "fc" flags.
1915 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1916 if (SpecReg == "spsr")
1919 Parser.Lex(); // Eat identifier token.
1920 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1921 return MatchOperand_Success;
1924 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1925 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1926 int Low, int High) {
1927 const AsmToken &Tok = Parser.getTok();
1928 if (Tok.isNot(AsmToken::Identifier)) {
1929 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1930 return MatchOperand_ParseFail;
1932 StringRef ShiftName = Tok.getString();
1933 std::string LowerOp = LowercaseString(Op);
1934 std::string UpperOp = UppercaseString(Op);
1935 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1936 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1937 return MatchOperand_ParseFail;
1939 Parser.Lex(); // Eat shift type token.
1941 // There must be a '#' and a shift amount.
1942 if (Parser.getTok().isNot(AsmToken::Hash)) {
1943 Error(Parser.getTok().getLoc(), "'#' expected");
1944 return MatchOperand_ParseFail;
1946 Parser.Lex(); // Eat hash token.
1948 const MCExpr *ShiftAmount;
1949 SMLoc Loc = Parser.getTok().getLoc();
1950 if (getParser().ParseExpression(ShiftAmount)) {
1951 Error(Loc, "illegal expression");
1952 return MatchOperand_ParseFail;
1954 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1956 Error(Loc, "constant expression expected");
1957 return MatchOperand_ParseFail;
1959 int Val = CE->getValue();
1960 if (Val < Low || Val > High) {
1961 Error(Loc, "immediate value out of range");
1962 return MatchOperand_ParseFail;
1965 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1967 return MatchOperand_Success;
1970 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1971 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1972 const AsmToken &Tok = Parser.getTok();
1973 SMLoc S = Tok.getLoc();
1974 if (Tok.isNot(AsmToken::Identifier)) {
1975 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1976 return MatchOperand_ParseFail;
1978 int Val = StringSwitch<int>(Tok.getString())
1982 Parser.Lex(); // Eat the token.
1985 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1986 return MatchOperand_ParseFail;
1988 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1990 S, Parser.getTok().getLoc()));
1991 return MatchOperand_Success;
1994 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1995 /// instructions. Legal values are:
1996 /// lsl #n 'n' in [0,31]
1997 /// asr #n 'n' in [1,32]
1998 /// n == 32 encoded as n == 0.
1999 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2000 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2001 const AsmToken &Tok = Parser.getTok();
2002 SMLoc S = Tok.getLoc();
2003 if (Tok.isNot(AsmToken::Identifier)) {
2004 Error(S, "shift operator 'asr' or 'lsl' expected");
2005 return MatchOperand_ParseFail;
2007 StringRef ShiftName = Tok.getString();
2009 if (ShiftName == "lsl" || ShiftName == "LSL")
2011 else if (ShiftName == "asr" || ShiftName == "ASR")
2014 Error(S, "shift operator 'asr' or 'lsl' expected");
2015 return MatchOperand_ParseFail;
2017 Parser.Lex(); // Eat the operator.
2019 // A '#' and a shift amount.
2020 if (Parser.getTok().isNot(AsmToken::Hash)) {
2021 Error(Parser.getTok().getLoc(), "'#' expected");
2022 return MatchOperand_ParseFail;
2024 Parser.Lex(); // Eat hash token.
2026 const MCExpr *ShiftAmount;
2027 SMLoc E = Parser.getTok().getLoc();
2028 if (getParser().ParseExpression(ShiftAmount)) {
2029 Error(E, "malformed shift expression");
2030 return MatchOperand_ParseFail;
2032 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2034 Error(E, "shift amount must be an immediate");
2035 return MatchOperand_ParseFail;
2038 int64_t Val = CE->getValue();
2040 // Shift amount must be in [1,32]
2041 if (Val < 1 || Val > 32) {
2042 Error(E, "'asr' shift amount must be in range [1,32]");
2043 return MatchOperand_ParseFail;
2045 // asr #32 encoded as asr #0.
2046 if (Val == 32) Val = 0;
2048 // Shift amount must be in [1,32]
2049 if (Val < 0 || Val > 31) {
2050 Error(E, "'lsr' shift amount must be in range [0,31]");
2051 return MatchOperand_ParseFail;
2055 E = Parser.getTok().getLoc();
2056 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2058 return MatchOperand_Success;
2061 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2062 /// of instructions. Legal values are:
2063 /// ror #n 'n' in {0, 8, 16, 24}
2064 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2065 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2066 const AsmToken &Tok = Parser.getTok();
2067 SMLoc S = Tok.getLoc();
2068 if (Tok.isNot(AsmToken::Identifier)) {
2069 Error(S, "rotate operator 'ror' expected");
2070 return MatchOperand_ParseFail;
2072 StringRef ShiftName = Tok.getString();
2073 if (ShiftName != "ror" && ShiftName != "ROR") {
2074 Error(S, "rotate operator 'ror' expected");
2075 return MatchOperand_ParseFail;
2077 Parser.Lex(); // Eat the operator.
2079 // A '#' and a rotate amount.
2080 if (Parser.getTok().isNot(AsmToken::Hash)) {
2081 Error(Parser.getTok().getLoc(), "'#' expected");
2082 return MatchOperand_ParseFail;
2084 Parser.Lex(); // Eat hash token.
2086 const MCExpr *ShiftAmount;
2087 SMLoc E = Parser.getTok().getLoc();
2088 if (getParser().ParseExpression(ShiftAmount)) {
2089 Error(E, "malformed rotate expression");
2090 return MatchOperand_ParseFail;
2092 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2094 Error(E, "rotate amount must be an immediate");
2095 return MatchOperand_ParseFail;
2098 int64_t Val = CE->getValue();
2099 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2100 // normally, zero is represented in asm by omitting the rotate operand
2102 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2103 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2104 return MatchOperand_ParseFail;
2107 E = Parser.getTok().getLoc();
2108 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2110 return MatchOperand_Success;
2113 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2114 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2115 SMLoc S = Parser.getTok().getLoc();
2116 // The bitfield descriptor is really two operands, the LSB and the width.
2117 if (Parser.getTok().isNot(AsmToken::Hash)) {
2118 Error(Parser.getTok().getLoc(), "'#' expected");
2119 return MatchOperand_ParseFail;
2121 Parser.Lex(); // Eat hash token.
2123 const MCExpr *LSBExpr;
2124 SMLoc E = Parser.getTok().getLoc();
2125 if (getParser().ParseExpression(LSBExpr)) {
2126 Error(E, "malformed immediate expression");
2127 return MatchOperand_ParseFail;
2129 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2131 Error(E, "'lsb' operand must be an immediate");
2132 return MatchOperand_ParseFail;
2135 int64_t LSB = CE->getValue();
2136 // The LSB must be in the range [0,31]
2137 if (LSB < 0 || LSB > 31) {
2138 Error(E, "'lsb' operand must be in the range [0,31]");
2139 return MatchOperand_ParseFail;
2141 E = Parser.getTok().getLoc();
2143 // Expect another immediate operand.
2144 if (Parser.getTok().isNot(AsmToken::Comma)) {
2145 Error(Parser.getTok().getLoc(), "too few operands");
2146 return MatchOperand_ParseFail;
2148 Parser.Lex(); // Eat hash token.
2149 if (Parser.getTok().isNot(AsmToken::Hash)) {
2150 Error(Parser.getTok().getLoc(), "'#' expected");
2151 return MatchOperand_ParseFail;
2153 Parser.Lex(); // Eat hash token.
2155 const MCExpr *WidthExpr;
2156 if (getParser().ParseExpression(WidthExpr)) {
2157 Error(E, "malformed immediate expression");
2158 return MatchOperand_ParseFail;
2160 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2162 Error(E, "'width' operand must be an immediate");
2163 return MatchOperand_ParseFail;
2166 int64_t Width = CE->getValue();
2167 // The LSB must be in the range [1,32-lsb]
2168 if (Width < 1 || Width > 32 - LSB) {
2169 Error(E, "'width' operand must be in the range [1,32-lsb]");
2170 return MatchOperand_ParseFail;
2172 E = Parser.getTok().getLoc();
2174 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2176 return MatchOperand_Success;
2179 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2180 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2181 // Check for a post-index addressing register operand. Specifically:
2182 // postidx_reg := '+' register {, shift}
2183 // | '-' register {, shift}
2184 // | register {, shift}
2186 // This method must return MatchOperand_NoMatch without consuming any tokens
2187 // in the case where there is no match, as other alternatives take other
2189 AsmToken Tok = Parser.getTok();
2190 SMLoc S = Tok.getLoc();
2191 bool haveEaten = false;
2194 if (Tok.is(AsmToken::Plus)) {
2195 Parser.Lex(); // Eat the '+' token.
2197 } else if (Tok.is(AsmToken::Minus)) {
2198 Parser.Lex(); // Eat the '-' token.
2202 if (Parser.getTok().is(AsmToken::Identifier))
2203 Reg = tryParseRegister();
2206 return MatchOperand_NoMatch;
2207 Error(Parser.getTok().getLoc(), "register expected");
2208 return MatchOperand_ParseFail;
2210 SMLoc E = Parser.getTok().getLoc();
2212 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2213 unsigned ShiftImm = 0;
2214 if (Parser.getTok().is(AsmToken::Comma)) {
2215 Parser.Lex(); // Eat the ','.
2216 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2217 return MatchOperand_ParseFail;
2220 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2223 return MatchOperand_Success;
2226 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2227 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2228 // Check for a post-index addressing register operand. Specifically:
2229 // am3offset := '+' register
2236 // This method must return MatchOperand_NoMatch without consuming any tokens
2237 // in the case where there is no match, as other alternatives take other
2239 AsmToken Tok = Parser.getTok();
2240 SMLoc S = Tok.getLoc();
2242 // Do immediates first, as we always parse those if we have a '#'.
2243 if (Parser.getTok().is(AsmToken::Hash)) {
2244 Parser.Lex(); // Eat the '#'.
2245 // Explicitly look for a '-', as we need to encode negative zero
2247 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2248 const MCExpr *Offset;
2249 if (getParser().ParseExpression(Offset))
2250 return MatchOperand_ParseFail;
2251 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2253 Error(S, "constant expression expected");
2254 return MatchOperand_ParseFail;
2256 SMLoc E = Tok.getLoc();
2257 // Negative zero is encoded as the flag value INT32_MIN.
2258 int32_t Val = CE->getValue();
2259 if (isNegative && Val == 0)
2263 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2265 return MatchOperand_Success;
2269 bool haveEaten = false;
2272 if (Tok.is(AsmToken::Plus)) {
2273 Parser.Lex(); // Eat the '+' token.
2275 } else if (Tok.is(AsmToken::Minus)) {
2276 Parser.Lex(); // Eat the '-' token.
2280 if (Parser.getTok().is(AsmToken::Identifier))
2281 Reg = tryParseRegister();
2284 return MatchOperand_NoMatch;
2285 Error(Parser.getTok().getLoc(), "register expected");
2286 return MatchOperand_ParseFail;
2288 SMLoc E = Parser.getTok().getLoc();
2290 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2293 return MatchOperand_Success;
2296 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2297 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2298 /// when they refer multiple MIOperands inside a single one.
2300 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2301 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2302 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2304 // Create a writeback register dummy placeholder.
2305 Inst.addOperand(MCOperand::CreateImm(0));
2307 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2308 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2312 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2313 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2314 /// when they refer multiple MIOperands inside a single one.
2316 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2317 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2318 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2320 // Create a writeback register dummy placeholder.
2321 Inst.addOperand(MCOperand::CreateImm(0));
2323 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2324 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2329 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2330 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2331 /// when they refer multiple MIOperands inside a single one.
2333 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2334 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2335 // Create a writeback register dummy placeholder.
2336 Inst.addOperand(MCOperand::CreateImm(0));
2337 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2338 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2339 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2343 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2344 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2345 /// when they refer multiple MIOperands inside a single one.
2347 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2348 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2349 // Create a writeback register dummy placeholder.
2350 Inst.addOperand(MCOperand::CreateImm(0));
2351 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2352 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2353 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2357 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2358 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2359 /// when they refer multiple MIOperands inside a single one.
2361 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2362 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2363 // Create a writeback register dummy placeholder.
2364 Inst.addOperand(MCOperand::CreateImm(0));
2365 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2366 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2367 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2371 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2372 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2373 /// when they refer multiple MIOperands inside a single one.
2375 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2376 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2378 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2379 // Create a writeback register dummy placeholder.
2380 Inst.addOperand(MCOperand::CreateImm(0));
2382 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2384 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2386 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2390 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2391 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2392 /// when they refer multiple MIOperands inside a single one.
2394 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2395 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2397 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2398 // Create a writeback register dummy placeholder.
2399 Inst.addOperand(MCOperand::CreateImm(0));
2401 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2403 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2405 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2409 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2410 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2411 /// when they refer multiple MIOperands inside a single one.
2413 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2414 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2415 // Create a writeback register dummy placeholder.
2416 Inst.addOperand(MCOperand::CreateImm(0));
2418 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2420 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2422 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2424 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2428 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2429 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2430 /// when they refer multiple MIOperands inside a single one.
2432 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2433 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2434 // Create a writeback register dummy placeholder.
2435 Inst.addOperand(MCOperand::CreateImm(0));
2437 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2439 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2441 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2443 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2447 /// cvtLdrdPre - Convert parsed operands to MCInst.
2448 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2449 /// when they refer multiple MIOperands inside a single one.
2451 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2452 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2454 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2455 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2456 // Create a writeback register dummy placeholder.
2457 Inst.addOperand(MCOperand::CreateImm(0));
2459 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2461 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2465 /// cvtStrdPre - Convert parsed operands to MCInst.
2466 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2467 /// when they refer multiple MIOperands inside a single one.
2469 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2470 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2471 // Create a writeback register dummy placeholder.
2472 Inst.addOperand(MCOperand::CreateImm(0));
2474 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2475 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2477 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2479 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2483 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2484 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2485 /// when they refer multiple MIOperands inside a single one.
2487 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2488 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2489 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2490 // Create a writeback register dummy placeholder.
2491 Inst.addOperand(MCOperand::CreateImm(0));
2492 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2493 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2497 /// cvtThumbMultiple- Convert parsed operands to MCInst.
2498 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2499 /// when they refer multiple MIOperands inside a single one.
2501 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
2502 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2503 // The second source operand must be the same register as the destination
2505 if (Operands.size() == 6 &&
2506 (((ARMOperand*)Operands[3])->getReg() !=
2507 ((ARMOperand*)Operands[5])->getReg()) &&
2508 (((ARMOperand*)Operands[3])->getReg() !=
2509 ((ARMOperand*)Operands[4])->getReg())) {
2510 Error(Operands[3]->getStartLoc(),
2511 "destination register must match source register");
2514 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2515 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
2516 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
2517 // If we have a three-operand form, use that, else the second source operand
2518 // is just the destination operand again.
2519 if (Operands.size() == 6)
2520 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
2522 Inst.addOperand(Inst.getOperand(0));
2523 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
2528 /// Parse an ARM memory expression, return false if successful else return true
2529 /// or an error. The first token must be a '[' when called.
2531 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2533 assert(Parser.getTok().is(AsmToken::LBrac) &&
2534 "Token is not a Left Bracket");
2535 S = Parser.getTok().getLoc();
2536 Parser.Lex(); // Eat left bracket token.
2538 const AsmToken &BaseRegTok = Parser.getTok();
2539 int BaseRegNum = tryParseRegister();
2540 if (BaseRegNum == -1)
2541 return Error(BaseRegTok.getLoc(), "register expected");
2543 // The next token must either be a comma or a closing bracket.
2544 const AsmToken &Tok = Parser.getTok();
2545 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2546 return Error(Tok.getLoc(), "malformed memory operand");
2548 if (Tok.is(AsmToken::RBrac)) {
2550 Parser.Lex(); // Eat right bracket token.
2552 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2558 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2559 Parser.Lex(); // Eat the comma.
2561 // If we have a '#' it's an immediate offset, else assume it's a register
2563 if (Parser.getTok().is(AsmToken::Hash)) {
2564 Parser.Lex(); // Eat the '#'.
2565 E = Parser.getTok().getLoc();
2567 // FIXME: Special case #-0 so we can correctly set the U bit.
2569 const MCExpr *Offset;
2570 if (getParser().ParseExpression(Offset))
2573 // The expression has to be a constant. Memory references with relocations
2574 // don't come through here, as they use the <label> forms of the relevant
2576 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2578 return Error (E, "constant expression expected");
2580 // Now we should have the closing ']'
2581 E = Parser.getTok().getLoc();
2582 if (Parser.getTok().isNot(AsmToken::RBrac))
2583 return Error(E, "']' expected");
2584 Parser.Lex(); // Eat right bracket token.
2586 // Don't worry about range checking the value here. That's handled by
2587 // the is*() predicates.
2588 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2589 ARM_AM::no_shift, 0, false, S,E));
2591 // If there's a pre-indexing writeback marker, '!', just add it as a token
2593 if (Parser.getTok().is(AsmToken::Exclaim)) {
2594 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2595 Parser.Lex(); // Eat the '!'.
2601 // The register offset is optionally preceded by a '+' or '-'
2602 bool isNegative = false;
2603 if (Parser.getTok().is(AsmToken::Minus)) {
2605 Parser.Lex(); // Eat the '-'.
2606 } else if (Parser.getTok().is(AsmToken::Plus)) {
2608 Parser.Lex(); // Eat the '+'.
2611 E = Parser.getTok().getLoc();
2612 int OffsetRegNum = tryParseRegister();
2613 if (OffsetRegNum == -1)
2614 return Error(E, "register expected");
2616 // If there's a shift operator, handle it.
2617 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2618 unsigned ShiftImm = 0;
2619 if (Parser.getTok().is(AsmToken::Comma)) {
2620 Parser.Lex(); // Eat the ','.
2621 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2625 // Now we should have the closing ']'
2626 E = Parser.getTok().getLoc();
2627 if (Parser.getTok().isNot(AsmToken::RBrac))
2628 return Error(E, "']' expected");
2629 Parser.Lex(); // Eat right bracket token.
2631 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2632 ShiftType, ShiftImm, isNegative,
2635 // If there's a pre-indexing writeback marker, '!', just add it as a token
2637 if (Parser.getTok().is(AsmToken::Exclaim)) {
2638 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2639 Parser.Lex(); // Eat the '!'.
2645 /// parseMemRegOffsetShift - one of these two:
2646 /// ( lsl | lsr | asr | ror ) , # shift_amount
2648 /// return true if it parses a shift otherwise it returns false.
2649 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2651 SMLoc Loc = Parser.getTok().getLoc();
2652 const AsmToken &Tok = Parser.getTok();
2653 if (Tok.isNot(AsmToken::Identifier))
2655 StringRef ShiftName = Tok.getString();
2656 if (ShiftName == "lsl" || ShiftName == "LSL")
2658 else if (ShiftName == "lsr" || ShiftName == "LSR")
2660 else if (ShiftName == "asr" || ShiftName == "ASR")
2662 else if (ShiftName == "ror" || ShiftName == "ROR")
2664 else if (ShiftName == "rrx" || ShiftName == "RRX")
2667 return Error(Loc, "illegal shift operator");
2668 Parser.Lex(); // Eat shift type token.
2670 // rrx stands alone.
2672 if (St != ARM_AM::rrx) {
2673 Loc = Parser.getTok().getLoc();
2674 // A '#' and a shift amount.
2675 const AsmToken &HashTok = Parser.getTok();
2676 if (HashTok.isNot(AsmToken::Hash))
2677 return Error(HashTok.getLoc(), "'#' expected");
2678 Parser.Lex(); // Eat hash token.
2681 if (getParser().ParseExpression(Expr))
2683 // Range check the immediate.
2684 // lsl, ror: 0 <= imm <= 31
2685 // lsr, asr: 0 <= imm <= 32
2686 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2688 return Error(Loc, "shift amount must be an immediate");
2689 int64_t Imm = CE->getValue();
2691 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2692 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2693 return Error(Loc, "immediate shift value out of range");
2700 /// Parse a arm instruction operand. For now this parses the operand regardless
2701 /// of the mnemonic.
2702 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2703 StringRef Mnemonic) {
2706 // Check if the current operand has a custom associated parser, if so, try to
2707 // custom parse the operand, or fallback to the general approach.
2708 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2709 if (ResTy == MatchOperand_Success)
2711 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2712 // there was a match, but an error occurred, in which case, just return that
2713 // the operand parsing failed.
2714 if (ResTy == MatchOperand_ParseFail)
2717 switch (getLexer().getKind()) {
2719 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2721 case AsmToken::Identifier: {
2722 if (!tryParseRegisterWithWriteBack(Operands))
2724 int Res = tryParseShiftRegister(Operands);
2725 if (Res == 0) // success
2727 else if (Res == -1) // irrecoverable error
2730 // Fall though for the Identifier case that is not a register or a
2733 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2734 case AsmToken::Dot: { // . as a branch target
2735 // This was not a register so parse other operands that start with an
2736 // identifier (like labels) as expressions and create them as immediates.
2737 const MCExpr *IdVal;
2738 S = Parser.getTok().getLoc();
2739 if (getParser().ParseExpression(IdVal))
2741 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2742 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2745 case AsmToken::LBrac:
2746 return parseMemory(Operands);
2747 case AsmToken::LCurly:
2748 return parseRegisterList(Operands);
2749 case AsmToken::Hash:
2750 // #42 -> immediate.
2751 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2752 S = Parser.getTok().getLoc();
2754 const MCExpr *ImmVal;
2755 if (getParser().ParseExpression(ImmVal))
2757 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2758 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2760 case AsmToken::Colon: {
2761 // ":lower16:" and ":upper16:" expression prefixes
2762 // FIXME: Check it's an expression prefix,
2763 // e.g. (FOO - :lower16:BAR) isn't legal.
2764 ARMMCExpr::VariantKind RefKind;
2765 if (parsePrefix(RefKind))
2768 const MCExpr *SubExprVal;
2769 if (getParser().ParseExpression(SubExprVal))
2772 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2774 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2775 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2781 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2782 // :lower16: and :upper16:.
2783 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2784 RefKind = ARMMCExpr::VK_ARM_None;
2786 // :lower16: and :upper16: modifiers
2787 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2788 Parser.Lex(); // Eat ':'
2790 if (getLexer().isNot(AsmToken::Identifier)) {
2791 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2795 StringRef IDVal = Parser.getTok().getIdentifier();
2796 if (IDVal == "lower16") {
2797 RefKind = ARMMCExpr::VK_ARM_LO16;
2798 } else if (IDVal == "upper16") {
2799 RefKind = ARMMCExpr::VK_ARM_HI16;
2801 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2806 if (getLexer().isNot(AsmToken::Colon)) {
2807 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2810 Parser.Lex(); // Eat the last ':'
2815 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2816 MCSymbolRefExpr::VariantKind Variant) {
2817 // Recurse over the given expression, rebuilding it to apply the given variant
2818 // to the leftmost symbol.
2819 if (Variant == MCSymbolRefExpr::VK_None)
2822 switch (E->getKind()) {
2823 case MCExpr::Target:
2824 llvm_unreachable("Can't handle target expr yet");
2825 case MCExpr::Constant:
2826 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2828 case MCExpr::SymbolRef: {
2829 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2831 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2834 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2838 llvm_unreachable("Can't handle unary expressions yet");
2840 case MCExpr::Binary: {
2841 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2842 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2843 const MCExpr *RHS = BE->getRHS();
2847 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2851 assert(0 && "Invalid expression kind!");
2855 /// \brief Given a mnemonic, split out possible predication code and carry
2856 /// setting letters to form a canonical mnemonic and flags.
2858 // FIXME: Would be nice to autogen this.
2859 // FIXME: This is a bit of a maze of special cases.
2860 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2861 unsigned &PredicationCode,
2863 unsigned &ProcessorIMod,
2864 StringRef &ITMask) {
2865 PredicationCode = ARMCC::AL;
2866 CarrySetting = false;
2869 // Ignore some mnemonics we know aren't predicated forms.
2871 // FIXME: Would be nice to autogen this.
2872 if ((Mnemonic == "movs" && isThumb()) ||
2873 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2874 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2875 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2876 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2877 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2878 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2879 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2882 // First, split out any predication code. Ignore mnemonics we know aren't
2883 // predicated but do have a carry-set and so weren't caught above.
2884 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2885 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2886 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
2887 Mnemonic != "sbcs") {
2888 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2889 .Case("eq", ARMCC::EQ)
2890 .Case("ne", ARMCC::NE)
2891 .Case("hs", ARMCC::HS)
2892 .Case("cs", ARMCC::HS)
2893 .Case("lo", ARMCC::LO)
2894 .Case("cc", ARMCC::LO)
2895 .Case("mi", ARMCC::MI)
2896 .Case("pl", ARMCC::PL)
2897 .Case("vs", ARMCC::VS)
2898 .Case("vc", ARMCC::VC)
2899 .Case("hi", ARMCC::HI)
2900 .Case("ls", ARMCC::LS)
2901 .Case("ge", ARMCC::GE)
2902 .Case("lt", ARMCC::LT)
2903 .Case("gt", ARMCC::GT)
2904 .Case("le", ARMCC::LE)
2905 .Case("al", ARMCC::AL)
2908 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2909 PredicationCode = CC;
2913 // Next, determine if we have a carry setting bit. We explicitly ignore all
2914 // the instructions we know end in 's'.
2915 if (Mnemonic.endswith("s") &&
2916 !(Mnemonic == "cps" || Mnemonic == "mls" ||
2917 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2918 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2919 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2920 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2921 (Mnemonic == "movs" && isThumb()))) {
2922 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2923 CarrySetting = true;
2926 // The "cps" instruction can have a interrupt mode operand which is glued into
2927 // the mnemonic. Check if this is the case, split it and parse the imod op
2928 if (Mnemonic.startswith("cps")) {
2929 // Split out any imod code.
2931 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2932 .Case("ie", ARM_PROC::IE)
2933 .Case("id", ARM_PROC::ID)
2936 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2937 ProcessorIMod = IMod;
2941 // The "it" instruction has the condition mask on the end of the mnemonic.
2942 if (Mnemonic.startswith("it")) {
2943 ITMask = Mnemonic.slice(2, Mnemonic.size());
2944 Mnemonic = Mnemonic.slice(0, 2);
2950 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2951 /// inclusion of carry set or predication code operands.
2953 // FIXME: It would be nice to autogen this.
2955 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2956 bool &CanAcceptPredicationCode) {
2957 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2958 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2959 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2960 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2961 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2962 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2963 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2964 Mnemonic == "eor" || Mnemonic == "smlal" || Mnemonic == "neg" ||
2965 // FIXME: We need a better way. This really confused Thumb2
2966 // parsing for 'mov'.
2967 (Mnemonic == "mov" && !isThumbOne())) {
2968 CanAcceptCarrySet = true;
2970 CanAcceptCarrySet = false;
2973 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2974 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2975 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2976 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2977 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2978 Mnemonic == "setend" ||
2979 (Mnemonic == "nop" && isThumbOne()) ||
2980 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2981 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2983 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2984 CanAcceptPredicationCode = false;
2986 CanAcceptPredicationCode = true;
2990 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2991 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2992 CanAcceptPredicationCode = false;
2995 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
2996 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2998 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2999 // another does not. Specifically, the MOVW instruction does not. So we
3000 // special case it here and remove the defaulted (non-setting) cc_out
3001 // operand if that's the instruction we're trying to match.
3003 // We do this as post-processing of the explicit operands rather than just
3004 // conditionally adding the cc_out in the first place because we need
3005 // to check the type of the parsed immediate operand.
3006 if (Mnemonic == "mov" && Operands.size() > 4 &&
3007 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
3008 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
3009 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3012 // Register-register 'add' for thumb does not have a cc_out operand
3013 // when there are only two register operands.
3014 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
3015 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3016 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3017 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3019 // Register-register 'add' for thumb does not have a cc_out operand
3020 // when it's an ADD Rdm, SP, {Rdm|#imm} instruction.
3021 if (isThumb() && Mnemonic == "add" && Operands.size() == 6 &&
3022 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3023 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3024 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
3025 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3027 // Register-register 'add/sub' for thumb does not have a cc_out operand
3028 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
3029 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
3030 // right, this will result in better diagnostics (which operand is off)
3032 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
3033 (Operands.size() == 5 || Operands.size() == 6) &&
3034 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3035 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
3036 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3042 /// Parse an arm instruction mnemonic followed by its operands.
3043 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
3044 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3045 // Create the leading tokens for the mnemonic, split by '.' characters.
3046 size_t Start = 0, Next = Name.find('.');
3047 StringRef Mnemonic = Name.slice(Start, Next);
3049 // Split out the predication code and carry setting flag from the mnemonic.
3050 unsigned PredicationCode;
3051 unsigned ProcessorIMod;
3054 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
3055 ProcessorIMod, ITMask);
3057 // In Thumb1, only the branch (B) instruction can be predicated.
3058 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
3059 Parser.EatToEndOfStatement();
3060 return Error(NameLoc, "conditional execution not supported in Thumb1");
3063 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
3065 // Handle the IT instruction ITMask. Convert it to a bitmask. This
3066 // is the mask as it will be for the IT encoding if the conditional
3067 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
3068 // where the conditional bit0 is zero, the instruction post-processing
3069 // will adjust the mask accordingly.
3070 if (Mnemonic == "it") {
3072 for (unsigned i = ITMask.size(); i != 0; --i) {
3073 char pos = ITMask[i - 1];
3074 if (pos != 't' && pos != 'e') {
3075 Parser.EatToEndOfStatement();
3076 return Error(NameLoc, "illegal IT instruction mask '" + ITMask + "'");
3079 if (ITMask[i - 1] == 't')
3082 Operands.push_back(ARMOperand::CreateITMask(Mask, NameLoc));
3085 // FIXME: This is all a pretty gross hack. We should automatically handle
3086 // optional operands like this via tblgen.
3088 // Next, add the CCOut and ConditionCode operands, if needed.
3090 // For mnemonics which can ever incorporate a carry setting bit or predication
3091 // code, our matching model involves us always generating CCOut and
3092 // ConditionCode operands to match the mnemonic "as written" and then we let
3093 // the matcher deal with finding the right instruction or generating an
3094 // appropriate error.
3095 bool CanAcceptCarrySet, CanAcceptPredicationCode;
3096 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
3098 // If we had a carry-set on an instruction that can't do that, issue an
3100 if (!CanAcceptCarrySet && CarrySetting) {
3101 Parser.EatToEndOfStatement();
3102 return Error(NameLoc, "instruction '" + Mnemonic +
3103 "' can not set flags, but 's' suffix specified");
3105 // If we had a predication code on an instruction that can't do that, issue an
3107 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
3108 Parser.EatToEndOfStatement();
3109 return Error(NameLoc, "instruction '" + Mnemonic +
3110 "' is not predicable, but condition code specified");
3113 // Add the carry setting operand, if necessary.
3115 // FIXME: It would be awesome if we could somehow invent a location such that
3116 // match errors on this operand would print a nice diagnostic about how the
3117 // 's' character in the mnemonic resulted in a CCOut operand.
3118 if (CanAcceptCarrySet)
3119 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
3122 // Add the predication code operand, if necessary.
3123 if (CanAcceptPredicationCode) {
3124 Operands.push_back(ARMOperand::CreateCondCode(
3125 ARMCC::CondCodes(PredicationCode), NameLoc));
3128 // Add the processor imod operand, if necessary.
3129 if (ProcessorIMod) {
3130 Operands.push_back(ARMOperand::CreateImm(
3131 MCConstantExpr::Create(ProcessorIMod, getContext()),
3135 // Add the remaining tokens in the mnemonic.
3136 while (Next != StringRef::npos) {
3138 Next = Name.find('.', Start + 1);
3139 StringRef ExtraToken = Name.slice(Start, Next);
3141 // For now, we're only parsing Thumb1 (for the most part), so
3142 // just ignore ".n" qualifiers. We'll use them to restrict
3143 // matching when we do Thumb2.
3144 if (ExtraToken != ".n")
3145 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
3148 // Read the remaining operands.
3149 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3150 // Read the first operand.
3151 if (parseOperand(Operands, Mnemonic)) {
3152 Parser.EatToEndOfStatement();
3156 while (getLexer().is(AsmToken::Comma)) {
3157 Parser.Lex(); // Eat the comma.
3159 // Parse and remember the operand.
3160 if (parseOperand(Operands, Mnemonic)) {
3161 Parser.EatToEndOfStatement();
3167 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3168 Parser.EatToEndOfStatement();
3169 return TokError("unexpected token in argument list");
3172 Parser.Lex(); // Consume the EndOfStatement
3174 // Some instructions, mostly Thumb, have forms for the same mnemonic that
3175 // do and don't have a cc_out optional-def operand. With some spot-checks
3176 // of the operand list, we can figure out which variant we're trying to
3177 // parse and adjust accordingly before actually matching. Reason number
3178 // #317 the table driven matcher doesn't fit well with the ARM instruction
3180 if (shouldOmitCCOutOperand(Mnemonic, Operands)) {
3181 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3182 Operands.erase(Operands.begin() + 1);
3186 // ARM mode 'blx' need special handling, as the register operand version
3187 // is predicable, but the label operand version is not. So, we can't rely
3188 // on the Mnemonic based checking to correctly figure out when to put
3189 // a CondCode operand in the list. If we're trying to match the label
3190 // version, remove the CondCode operand here.
3191 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
3192 static_cast<ARMOperand*>(Operands[2])->isImm()) {
3193 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3194 Operands.erase(Operands.begin() + 1);
3198 // The vector-compare-to-zero instructions have a literal token "#0" at
3199 // the end that comes to here as an immediate operand. Convert it to a
3200 // token to play nicely with the matcher.
3201 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
3202 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
3203 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3204 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3205 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3206 if (CE && CE->getValue() == 0) {
3207 Operands.erase(Operands.begin() + 5);
3208 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3212 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
3213 // end. Convert it to a token here.
3214 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
3215 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3216 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3217 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3218 if (CE && CE->getValue() == 0) {
3219 Operands.erase(Operands.begin() + 5);
3220 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3228 // Validate context-sensitive operand constraints.
3230 // return 'true' if register list contains non-low GPR registers,
3231 // 'false' otherwise. If Reg is in the register list or is HiReg, set
3232 // 'containsReg' to true.
3233 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
3234 unsigned HiReg, bool &containsReg) {
3235 containsReg = false;
3236 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
3237 unsigned OpReg = Inst.getOperand(i).getReg();
3240 // Anything other than a low register isn't legal here.
3241 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
3247 // FIXME: We would really like to be able to tablegen'erate this.
3249 validateInstruction(MCInst &Inst,
3250 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3251 switch (Inst.getOpcode()) {
3254 case ARM::LDRD_POST:
3256 // Rt2 must be Rt + 1.
3257 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3258 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3260 return Error(Operands[3]->getStartLoc(),
3261 "destination operands must be sequential");
3265 // Rt2 must be Rt + 1.
3266 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3267 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3269 return Error(Operands[3]->getStartLoc(),
3270 "source operands must be sequential");
3274 case ARM::STRD_POST:
3276 // Rt2 must be Rt + 1.
3277 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3278 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3280 return Error(Operands[3]->getStartLoc(),
3281 "source operands must be sequential");
3286 // width must be in range [1, 32-lsb]
3287 unsigned lsb = Inst.getOperand(2).getImm();
3288 unsigned widthm1 = Inst.getOperand(3).getImm();
3289 if (widthm1 >= 32 - lsb)
3290 return Error(Operands[5]->getStartLoc(),
3291 "bitfield width must be in range [1,32-lsb]");
3295 // Thumb LDM instructions are writeback iff the base register is not
3296 // in the register list.
3297 unsigned Rn = Inst.getOperand(0).getReg();
3298 bool hasWritebackToken =
3299 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
3300 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
3301 bool listContainsBase;
3302 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase))
3303 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
3304 "registers must be in range r0-r7");
3305 // If we should have writeback, then there should be a '!' token.
3306 if (!listContainsBase && !hasWritebackToken)
3307 return Error(Operands[2]->getStartLoc(),
3308 "writeback operator '!' expected");
3309 // Likewise, if we should not have writeback, there must not be a '!'
3310 if (listContainsBase && hasWritebackToken)
3311 return Error(Operands[3]->getStartLoc(),
3312 "writeback operator '!' not allowed when base register "
3313 "in register list");
3318 bool listContainsBase;
3319 if (checkLowRegisterList(Inst, 3, 0, ARM::PC, listContainsBase))
3320 return Error(Operands[2]->getStartLoc(),
3321 "registers must be in range r0-r7 or pc");
3325 bool listContainsBase;
3326 if (checkLowRegisterList(Inst, 3, 0, ARM::LR, listContainsBase))
3327 return Error(Operands[2]->getStartLoc(),
3328 "registers must be in range r0-r7 or lr");
3331 case ARM::tSTMIA_UPD: {
3332 bool listContainsBase;
3333 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase))
3334 return Error(Operands[4]->getStartLoc(),
3335 "registers must be in range r0-r7");
3344 processInstruction(MCInst &Inst,
3345 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3346 switch (Inst.getOpcode()) {
3347 case ARM::LDMIA_UPD:
3348 // If this is a load of a single register via a 'pop', then we should use
3349 // a post-indexed LDR instruction instead, per the ARM ARM.
3350 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3351 Inst.getNumOperands() == 5) {
3353 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3354 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3355 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3356 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3357 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3358 TmpInst.addOperand(MCOperand::CreateImm(4));
3359 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3360 TmpInst.addOperand(Inst.getOperand(3));
3364 case ARM::STMDB_UPD:
3365 // If this is a store of a single register via a 'push', then we should use
3366 // a pre-indexed STR instruction instead, per the ARM ARM.
3367 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3368 Inst.getNumOperands() == 5) {
3370 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3371 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3372 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3373 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3374 TmpInst.addOperand(MCOperand::CreateImm(-4));
3375 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3376 TmpInst.addOperand(Inst.getOperand(3));
3381 // If the immediate is in the range 0-7, we really wanted tADDi3.
3382 if (Inst.getOperand(3).getImm() < 8)
3383 Inst.setOpcode(ARM::tADDi3);
3386 // If the conditional is AL, we really want tB.
3387 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3388 Inst.setOpcode(ARM::tB);
3391 // The mask bits for all but the first condition are represented as
3392 // the low bit of the condition code value implies 't'. We currently
3393 // always have 1 implies 't', so XOR toggle the bits if the low bit
3394 // of the condition code is zero. The encoding also expects the low
3395 // bit of the condition to be encoded as bit 4 of the mask operand,
3396 // so mask that in if needed
3397 MCOperand &MO = Inst.getOperand(1);
3398 unsigned Mask = MO.getImm();
3399 if ((Inst.getOperand(0).getImm() & 1) == 0) {
3400 unsigned TZ = CountTrailingZeros_32(Mask);
3401 assert(Mask && TZ <= 3 && "illegal IT mask value!");
3402 for (unsigned i = 3; i != TZ; --i)
3412 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3413 // the ARMInsts array) instead. Getting that here requires awkward
3414 // API changes, though. Better way?
3416 extern MCInstrDesc ARMInsts[];
3418 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3419 return ARMInsts[Opcode];
3422 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3423 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3424 // suffix depending on whether they're in an IT block or not.
3425 unsigned Opc = Inst.getOpcode();
3426 MCInstrDesc &MCID = getInstDesc(Opc);
3427 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3428 assert(MCID.hasOptionalDef() &&
3429 "optionally flag setting instruction missing optional def operand");
3430 assert(MCID.NumOperands == Inst.getNumOperands() &&
3431 "operand count mismatch!");
3432 // Find the optional-def operand (cc_out).
3435 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3438 // If we're parsing Thumb1, reject it completely.
3439 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3440 return Match_MnemonicFail;
3441 // If we're parsing Thumb2, which form is legal depends on whether we're
3443 // FIXME: We don't yet do IT blocks, so just always consider it to be
3444 // that we aren't in one until we do.
3445 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3446 return Match_RequiresITBlock;
3448 // Some high-register supporting Thumb1 encodings only allow both registers
3449 // to be from r0-r7 when in Thumb2.
3450 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3451 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3452 isARMLowRegister(Inst.getOperand(2).getReg()))
3453 return Match_RequiresThumb2;
3454 // Others only require ARMv6 or later.
3455 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
3456 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3457 isARMLowRegister(Inst.getOperand(1).getReg()))
3458 return Match_RequiresV6;
3459 return Match_Success;
3463 MatchAndEmitInstruction(SMLoc IDLoc,
3464 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3468 unsigned MatchResult;
3469 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3470 switch (MatchResult) {
3473 // Context sensitive operand constraints aren't handled by the matcher,
3474 // so check them here.
3475 if (validateInstruction(Inst, Operands))
3478 // Some instructions need post-processing to, for example, tweak which
3479 // encoding is selected.
3480 processInstruction(Inst, Operands);
3482 Out.EmitInstruction(Inst);
3484 case Match_MissingFeature:
3485 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3487 case Match_InvalidOperand: {
3488 SMLoc ErrorLoc = IDLoc;
3489 if (ErrorInfo != ~0U) {
3490 if (ErrorInfo >= Operands.size())
3491 return Error(IDLoc, "too few operands for instruction");
3493 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3494 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3497 return Error(ErrorLoc, "invalid operand for instruction");
3499 case Match_MnemonicFail:
3500 return Error(IDLoc, "invalid instruction");
3501 case Match_ConversionFail:
3502 // The converter function will have already emited a diagnostic.
3504 case Match_RequiresITBlock:
3505 return Error(IDLoc, "instruction only valid inside IT block");
3506 case Match_RequiresV6:
3507 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3508 case Match_RequiresThumb2:
3509 return Error(IDLoc, "instruction variant requires Thumb2");
3512 llvm_unreachable("Implement any new match types added!");
3516 /// parseDirective parses the arm specific directives
3517 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3518 StringRef IDVal = DirectiveID.getIdentifier();
3519 if (IDVal == ".word")
3520 return parseDirectiveWord(4, DirectiveID.getLoc());
3521 else if (IDVal == ".thumb")
3522 return parseDirectiveThumb(DirectiveID.getLoc());
3523 else if (IDVal == ".thumb_func")
3524 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3525 else if (IDVal == ".code")
3526 return parseDirectiveCode(DirectiveID.getLoc());
3527 else if (IDVal == ".syntax")
3528 return parseDirectiveSyntax(DirectiveID.getLoc());
3532 /// parseDirectiveWord
3533 /// ::= .word [ expression (, expression)* ]
3534 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3535 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3537 const MCExpr *Value;
3538 if (getParser().ParseExpression(Value))
3541 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3543 if (getLexer().is(AsmToken::EndOfStatement))
3546 // FIXME: Improve diagnostic.
3547 if (getLexer().isNot(AsmToken::Comma))
3548 return Error(L, "unexpected token in directive");
3557 /// parseDirectiveThumb
3559 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3560 if (getLexer().isNot(AsmToken::EndOfStatement))
3561 return Error(L, "unexpected token in directive");
3564 // TODO: set thumb mode
3565 // TODO: tell the MC streamer the mode
3566 // getParser().getStreamer().Emit???();
3570 /// parseDirectiveThumbFunc
3571 /// ::= .thumbfunc symbol_name
3572 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3573 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3574 bool isMachO = MAI.hasSubsectionsViaSymbols();
3577 // Darwin asm has function name after .thumb_func direction
3580 const AsmToken &Tok = Parser.getTok();
3581 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3582 return Error(L, "unexpected token in .thumb_func directive");
3583 Name = Tok.getString();
3584 Parser.Lex(); // Consume the identifier token.
3587 if (getLexer().isNot(AsmToken::EndOfStatement))
3588 return Error(L, "unexpected token in directive");
3591 // FIXME: assuming function name will be the line following .thumb_func
3593 Name = Parser.getTok().getString();
3596 // Mark symbol as a thumb symbol.
3597 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3598 getParser().getStreamer().EmitThumbFunc(Func);
3602 /// parseDirectiveSyntax
3603 /// ::= .syntax unified | divided
3604 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3605 const AsmToken &Tok = Parser.getTok();
3606 if (Tok.isNot(AsmToken::Identifier))
3607 return Error(L, "unexpected token in .syntax directive");
3608 StringRef Mode = Tok.getString();
3609 if (Mode == "unified" || Mode == "UNIFIED")
3611 else if (Mode == "divided" || Mode == "DIVIDED")
3612 return Error(L, "'.syntax divided' arm asssembly not supported");
3614 return Error(L, "unrecognized syntax mode in .syntax directive");
3616 if (getLexer().isNot(AsmToken::EndOfStatement))
3617 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3620 // TODO tell the MC streamer the mode
3621 // getParser().getStreamer().Emit???();
3625 /// parseDirectiveCode
3626 /// ::= .code 16 | 32
3627 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3628 const AsmToken &Tok = Parser.getTok();
3629 if (Tok.isNot(AsmToken::Integer))
3630 return Error(L, "unexpected token in .code directive");
3631 int64_t Val = Parser.getTok().getIntVal();
3637 return Error(L, "invalid operand to .code directive");
3639 if (getLexer().isNot(AsmToken::EndOfStatement))
3640 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3646 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3651 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3658 extern "C" void LLVMInitializeARMAsmLexer();
3660 /// Force static initialization.
3661 extern "C" void LLVMInitializeARMAsmParser() {
3662 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3663 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3664 LLVMInitializeARMAsmLexer();
3667 #define GET_REGISTER_MATCHER
3668 #define GET_MATCHER_IMPLEMENTATION
3669 #include "ARMGenAsmMatcher.inc"