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/StringSwitch.h"
34 #include "llvm/ADT/Twine.h"
42 class ARMAsmParser : public MCTargetAsmParser {
47 ARMCC::CondCodes Cond; // Condition for IT block.
48 unsigned Mask:4; // Condition mask for instructions.
49 // Starting at first 1 (from lsb).
50 // '1' condition as indicated in IT.
51 // '0' inverse of condition (else).
52 // Count of instructions in IT block is
53 // 4 - trailingzeroes(mask)
55 bool FirstCond; // Explicit flag for when we're parsing the
56 // First instruction in the IT block. It's
57 // implied in the mask, so needs special
60 unsigned CurPosition; // Current position in parsing of IT
61 // block. In range [0,3]. Initialized
62 // according to count of instructions in block.
63 // ~0U if no active IT block.
65 bool inITBlock() { return ITState.CurPosition != ~0U;}
66 void forwardITPosition() {
67 if (!inITBlock()) return;
68 // Move to the next instruction in the IT block, if there is one. If not,
69 // mark the block as done.
70 unsigned TZ = CountTrailingZeros_32(ITState.Mask);
71 if (++ITState.CurPosition == 5 - TZ)
72 ITState.CurPosition = ~0U; // Done with the IT block after this.
76 MCAsmParser &getParser() const { return Parser; }
77 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
79 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
80 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
82 int tryParseRegister();
83 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
84 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
85 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
86 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
87 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
88 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
89 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
90 unsigned &ShiftAmount);
91 bool parseDirectiveWord(unsigned Size, SMLoc L);
92 bool parseDirectiveThumb(SMLoc L);
93 bool parseDirectiveThumbFunc(SMLoc L);
94 bool parseDirectiveCode(SMLoc L);
95 bool parseDirectiveSyntax(SMLoc L);
97 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
98 bool &CarrySetting, unsigned &ProcessorIMod,
100 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
101 bool &CanAcceptPredicationCode);
103 bool isThumb() const {
104 // FIXME: Can tablegen auto-generate this?
105 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
107 bool isThumbOne() const {
108 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
110 bool isThumbTwo() const {
111 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2);
113 bool hasV6Ops() const {
114 return STI.getFeatureBits() & ARM::HasV6Ops;
116 bool hasV7Ops() const {
117 return STI.getFeatureBits() & ARM::HasV7Ops;
120 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
121 setAvailableFeatures(FB);
123 bool isMClass() const {
124 return STI.getFeatureBits() & ARM::FeatureMClass;
127 /// @name Auto-generated Match Functions
130 #define GET_ASSEMBLER_HEADER
131 #include "ARMGenAsmMatcher.inc"
135 OperandMatchResultTy parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*>&);
136 OperandMatchResultTy parseCoprocNumOperand(
137 SmallVectorImpl<MCParsedAsmOperand*>&);
138 OperandMatchResultTy parseCoprocRegOperand(
139 SmallVectorImpl<MCParsedAsmOperand*>&);
140 OperandMatchResultTy parseCoprocOptionOperand(
141 SmallVectorImpl<MCParsedAsmOperand*>&);
142 OperandMatchResultTy parseMemBarrierOptOperand(
143 SmallVectorImpl<MCParsedAsmOperand*>&);
144 OperandMatchResultTy parseProcIFlagsOperand(
145 SmallVectorImpl<MCParsedAsmOperand*>&);
146 OperandMatchResultTy parseMSRMaskOperand(
147 SmallVectorImpl<MCParsedAsmOperand*>&);
148 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
149 StringRef Op, int Low, int High);
150 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
151 return parsePKHImm(O, "lsl", 0, 31);
153 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
154 return parsePKHImm(O, "asr", 1, 32);
156 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
157 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
158 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
159 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
160 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
161 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
162 OperandMatchResultTy parseFPImm(SmallVectorImpl<MCParsedAsmOperand*>&);
163 OperandMatchResultTy parseVectorList(SmallVectorImpl<MCParsedAsmOperand*>&);
165 // Asm Match Converter Methods
166 bool cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
167 const SmallVectorImpl<MCParsedAsmOperand*> &);
168 bool cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
169 const SmallVectorImpl<MCParsedAsmOperand*> &);
170 bool cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
171 const SmallVectorImpl<MCParsedAsmOperand*> &);
172 bool cvtStWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
173 const SmallVectorImpl<MCParsedAsmOperand*> &);
174 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
175 const SmallVectorImpl<MCParsedAsmOperand*> &);
176 bool cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
177 const SmallVectorImpl<MCParsedAsmOperand*> &);
178 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
179 const SmallVectorImpl<MCParsedAsmOperand*> &);
180 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
181 const SmallVectorImpl<MCParsedAsmOperand*> &);
182 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
183 const SmallVectorImpl<MCParsedAsmOperand*> &);
184 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
185 const SmallVectorImpl<MCParsedAsmOperand*> &);
186 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
187 const SmallVectorImpl<MCParsedAsmOperand*> &);
188 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
189 const SmallVectorImpl<MCParsedAsmOperand*> &);
190 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
191 const SmallVectorImpl<MCParsedAsmOperand*> &);
192 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
193 const SmallVectorImpl<MCParsedAsmOperand*> &);
194 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
195 const SmallVectorImpl<MCParsedAsmOperand*> &);
196 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
197 const SmallVectorImpl<MCParsedAsmOperand*> &);
198 bool cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
199 const SmallVectorImpl<MCParsedAsmOperand*> &);
200 bool cvtVLDwbFixed(MCInst &Inst, unsigned Opcode,
201 const SmallVectorImpl<MCParsedAsmOperand*> &);
202 bool cvtVLDwbRegister(MCInst &Inst, unsigned Opcode,
203 const SmallVectorImpl<MCParsedAsmOperand*> &);
204 bool cvtVSTwbFixed(MCInst &Inst, unsigned Opcode,
205 const SmallVectorImpl<MCParsedAsmOperand*> &);
206 bool cvtVSTwbRegister(MCInst &Inst, unsigned Opcode,
207 const SmallVectorImpl<MCParsedAsmOperand*> &);
209 bool validateInstruction(MCInst &Inst,
210 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
211 bool processInstruction(MCInst &Inst,
212 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
213 bool shouldOmitCCOutOperand(StringRef Mnemonic,
214 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
217 enum ARMMatchResultTy {
218 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
219 Match_RequiresNotITBlock,
224 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
225 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
226 MCAsmParserExtension::Initialize(_Parser);
228 // Initialize the set of available features.
229 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
231 // Not in an ITBlock to start with.
232 ITState.CurPosition = ~0U;
235 // Implementation of the MCTargetAsmParser interface:
236 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
237 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
238 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
239 bool ParseDirective(AsmToken DirectiveID);
241 unsigned checkTargetMatchPredicate(MCInst &Inst);
243 bool MatchAndEmitInstruction(SMLoc IDLoc,
244 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
247 } // end anonymous namespace
251 /// ARMOperand - Instances of this class represent a parsed ARM machine
253 class ARMOperand : public MCParsedAsmOperand {
278 k_BitfieldDescriptor,
282 SMLoc StartLoc, EndLoc;
283 SmallVector<unsigned, 8> Registers;
287 ARMCC::CondCodes Val;
307 ARM_PROC::IFlags Val;
323 // A vector register list is a sequential list of 1 to 4 registers.
338 unsigned Val; // encoded 8-bit representation
341 /// Combined record for all forms of ARM address expressions.
344 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
346 const MCConstantExpr *OffsetImm; // Offset immediate value
347 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
348 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
349 unsigned ShiftImm; // shift for OffsetReg.
350 unsigned Alignment; // 0 = no alignment specified
351 // n = alignment in bytes (8, 16, or 32)
352 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
358 ARM_AM::ShiftOpc ShiftTy;
367 ARM_AM::ShiftOpc ShiftTy;
373 ARM_AM::ShiftOpc ShiftTy;
386 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
388 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
390 StartLoc = o.StartLoc;
407 case k_DPRRegisterList:
408 case k_SPRRegisterList:
409 Registers = o.Registers;
412 VectorList = o.VectorList;
419 CoprocOption = o.CoprocOption;
427 case k_MemBarrierOpt:
433 case k_PostIndexRegister:
434 PostIdxReg = o.PostIdxReg;
442 case k_ShifterImmediate:
443 ShifterImm = o.ShifterImm;
445 case k_ShiftedRegister:
446 RegShiftedReg = o.RegShiftedReg;
448 case k_ShiftedImmediate:
449 RegShiftedImm = o.RegShiftedImm;
451 case k_RotateImmediate:
454 case k_BitfieldDescriptor:
455 Bitfield = o.Bitfield;
458 VectorIndex = o.VectorIndex;
463 /// getStartLoc - Get the location of the first token of this operand.
464 SMLoc getStartLoc() const { return StartLoc; }
465 /// getEndLoc - Get the location of the last token of this operand.
466 SMLoc getEndLoc() const { return EndLoc; }
468 ARMCC::CondCodes getCondCode() const {
469 assert(Kind == k_CondCode && "Invalid access!");
473 unsigned getCoproc() const {
474 assert((Kind == k_CoprocNum || Kind == k_CoprocReg) && "Invalid access!");
478 StringRef getToken() const {
479 assert(Kind == k_Token && "Invalid access!");
480 return StringRef(Tok.Data, Tok.Length);
483 unsigned getReg() const {
484 assert((Kind == k_Register || Kind == k_CCOut) && "Invalid access!");
488 const SmallVectorImpl<unsigned> &getRegList() const {
489 assert((Kind == k_RegisterList || Kind == k_DPRRegisterList ||
490 Kind == k_SPRRegisterList) && "Invalid access!");
494 const MCExpr *getImm() const {
495 assert(Kind == k_Immediate && "Invalid access!");
499 unsigned getFPImm() const {
500 assert(Kind == k_FPImmediate && "Invalid access!");
504 unsigned getVectorIndex() const {
505 assert(Kind == k_VectorIndex && "Invalid access!");
506 return VectorIndex.Val;
509 ARM_MB::MemBOpt getMemBarrierOpt() const {
510 assert(Kind == k_MemBarrierOpt && "Invalid access!");
514 ARM_PROC::IFlags getProcIFlags() const {
515 assert(Kind == k_ProcIFlags && "Invalid access!");
519 unsigned getMSRMask() const {
520 assert(Kind == k_MSRMask && "Invalid access!");
524 bool isCoprocNum() const { return Kind == k_CoprocNum; }
525 bool isCoprocReg() const { return Kind == k_CoprocReg; }
526 bool isCoprocOption() const { return Kind == k_CoprocOption; }
527 bool isCondCode() const { return Kind == k_CondCode; }
528 bool isCCOut() const { return Kind == k_CCOut; }
529 bool isITMask() const { return Kind == k_ITCondMask; }
530 bool isITCondCode() const { return Kind == k_CondCode; }
531 bool isImm() const { return Kind == k_Immediate; }
532 bool isFPImm() const { return Kind == k_FPImmediate; }
533 bool isImm8s4() const {
534 if (Kind != k_Immediate)
536 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
537 if (!CE) return false;
538 int64_t Value = CE->getValue();
539 return ((Value & 3) == 0) && Value >= -1020 && Value <= 1020;
541 bool isImm0_1020s4() const {
542 if (Kind != k_Immediate)
544 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
545 if (!CE) return false;
546 int64_t Value = CE->getValue();
547 return ((Value & 3) == 0) && Value >= 0 && Value <= 1020;
549 bool isImm0_508s4() const {
550 if (Kind != k_Immediate)
552 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
553 if (!CE) return false;
554 int64_t Value = CE->getValue();
555 return ((Value & 3) == 0) && Value >= 0 && Value <= 508;
557 bool isImm0_255() const {
558 if (Kind != k_Immediate)
560 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
561 if (!CE) return false;
562 int64_t Value = CE->getValue();
563 return Value >= 0 && Value < 256;
565 bool isImm0_7() const {
566 if (Kind != k_Immediate)
568 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
569 if (!CE) return false;
570 int64_t Value = CE->getValue();
571 return Value >= 0 && Value < 8;
573 bool isImm0_15() const {
574 if (Kind != k_Immediate)
576 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
577 if (!CE) return false;
578 int64_t Value = CE->getValue();
579 return Value >= 0 && Value < 16;
581 bool isImm0_31() const {
582 if (Kind != k_Immediate)
584 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
585 if (!CE) return false;
586 int64_t Value = CE->getValue();
587 return Value >= 0 && Value < 32;
589 bool isImm1_16() const {
590 if (Kind != k_Immediate)
592 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
593 if (!CE) return false;
594 int64_t Value = CE->getValue();
595 return Value > 0 && Value < 17;
597 bool isImm1_32() const {
598 if (Kind != k_Immediate)
600 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
601 if (!CE) return false;
602 int64_t Value = CE->getValue();
603 return Value > 0 && Value < 33;
605 bool isImm0_32() const {
606 if (Kind != k_Immediate)
608 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
609 if (!CE) return false;
610 int64_t Value = CE->getValue();
611 return Value >= 0 && Value < 33;
613 bool isImm0_65535() const {
614 if (Kind != k_Immediate)
616 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
617 if (!CE) return false;
618 int64_t Value = CE->getValue();
619 return Value >= 0 && Value < 65536;
621 bool isImm0_65535Expr() const {
622 if (Kind != k_Immediate)
624 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
625 // If it's not a constant expression, it'll generate a fixup and be
627 if (!CE) return true;
628 int64_t Value = CE->getValue();
629 return Value >= 0 && Value < 65536;
631 bool isImm24bit() const {
632 if (Kind != k_Immediate)
634 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
635 if (!CE) return false;
636 int64_t Value = CE->getValue();
637 return Value >= 0 && Value <= 0xffffff;
639 bool isImmThumbSR() const {
640 if (Kind != k_Immediate)
642 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
643 if (!CE) return false;
644 int64_t Value = CE->getValue();
645 return Value > 0 && Value < 33;
647 bool isPKHLSLImm() const {
648 if (Kind != k_Immediate)
650 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
651 if (!CE) return false;
652 int64_t Value = CE->getValue();
653 return Value >= 0 && Value < 32;
655 bool isPKHASRImm() const {
656 if (Kind != k_Immediate)
658 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
659 if (!CE) return false;
660 int64_t Value = CE->getValue();
661 return Value > 0 && Value <= 32;
663 bool isARMSOImm() const {
664 if (Kind != k_Immediate)
666 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
667 if (!CE) return false;
668 int64_t Value = CE->getValue();
669 return ARM_AM::getSOImmVal(Value) != -1;
671 bool isARMSOImmNot() const {
672 if (Kind != k_Immediate)
674 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
675 if (!CE) return false;
676 int64_t Value = CE->getValue();
677 return ARM_AM::getSOImmVal(~Value) != -1;
679 bool isT2SOImm() const {
680 if (Kind != k_Immediate)
682 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
683 if (!CE) return false;
684 int64_t Value = CE->getValue();
685 return ARM_AM::getT2SOImmVal(Value) != -1;
687 bool isT2SOImmNot() const {
688 if (Kind != k_Immediate)
690 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
691 if (!CE) return false;
692 int64_t Value = CE->getValue();
693 return ARM_AM::getT2SOImmVal(~Value) != -1;
695 bool isSetEndImm() const {
696 if (Kind != k_Immediate)
698 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
699 if (!CE) return false;
700 int64_t Value = CE->getValue();
701 return Value == 1 || Value == 0;
703 bool isReg() const { return Kind == k_Register; }
704 bool isRegList() const { return Kind == k_RegisterList; }
705 bool isDPRRegList() const { return Kind == k_DPRRegisterList; }
706 bool isSPRRegList() const { return Kind == k_SPRRegisterList; }
707 bool isToken() const { return Kind == k_Token; }
708 bool isMemBarrierOpt() const { return Kind == k_MemBarrierOpt; }
709 bool isMemory() const { return Kind == k_Memory; }
710 bool isShifterImm() const { return Kind == k_ShifterImmediate; }
711 bool isRegShiftedReg() const { return Kind == k_ShiftedRegister; }
712 bool isRegShiftedImm() const { return Kind == k_ShiftedImmediate; }
713 bool isRotImm() const { return Kind == k_RotateImmediate; }
714 bool isBitfield() const { return Kind == k_BitfieldDescriptor; }
715 bool isPostIdxRegShifted() const { return Kind == k_PostIndexRegister; }
716 bool isPostIdxReg() const {
717 return Kind == k_PostIndexRegister && PostIdxReg.ShiftTy ==ARM_AM::no_shift;
719 bool isMemNoOffset(bool alignOK = false) const {
722 // No offset of any kind.
723 return Memory.OffsetRegNum == 0 && Memory.OffsetImm == 0 &&
724 (alignOK || Memory.Alignment == 0);
726 bool isAlignedMemory() const {
727 return isMemNoOffset(true);
729 bool isAddrMode2() const {
730 if (!isMemory() || Memory.Alignment != 0) return false;
731 // Check for register offset.
732 if (Memory.OffsetRegNum) return true;
733 // Immediate offset in range [-4095, 4095].
734 if (!Memory.OffsetImm) return true;
735 int64_t Val = Memory.OffsetImm->getValue();
736 return Val > -4096 && Val < 4096;
738 bool isAM2OffsetImm() const {
739 if (Kind != k_Immediate)
741 // Immediate offset in range [-4095, 4095].
742 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
743 if (!CE) return false;
744 int64_t Val = CE->getValue();
745 return Val > -4096 && Val < 4096;
747 bool isAddrMode3() const {
748 if (!isMemory() || Memory.Alignment != 0) return false;
749 // No shifts are legal for AM3.
750 if (Memory.ShiftType != ARM_AM::no_shift) return false;
751 // Check for register offset.
752 if (Memory.OffsetRegNum) return true;
753 // Immediate offset in range [-255, 255].
754 if (!Memory.OffsetImm) return true;
755 int64_t Val = Memory.OffsetImm->getValue();
756 return Val > -256 && Val < 256;
758 bool isAM3Offset() const {
759 if (Kind != k_Immediate && Kind != k_PostIndexRegister)
761 if (Kind == k_PostIndexRegister)
762 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
763 // Immediate offset in range [-255, 255].
764 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
765 if (!CE) return false;
766 int64_t Val = CE->getValue();
767 // Special case, #-0 is INT32_MIN.
768 return (Val > -256 && Val < 256) || Val == INT32_MIN;
770 bool isAddrMode5() const {
771 // If we have an immediate that's not a constant, treat it as a label
772 // reference needing a fixup. If it is a constant, it's something else
774 if (Kind == k_Immediate && !isa<MCConstantExpr>(getImm()))
776 if (!isMemory() || Memory.Alignment != 0) return false;
777 // Check for register offset.
778 if (Memory.OffsetRegNum) return false;
779 // Immediate offset in range [-1020, 1020] and a multiple of 4.
780 if (!Memory.OffsetImm) return true;
781 int64_t Val = Memory.OffsetImm->getValue();
782 return (Val >= -1020 && Val <= 1020 && ((Val & 3) == 0)) ||
785 bool isMemTBB() const {
786 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
787 Memory.ShiftType != ARM_AM::no_shift || Memory.Alignment != 0)
791 bool isMemTBH() const {
792 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
793 Memory.ShiftType != ARM_AM::lsl || Memory.ShiftImm != 1 ||
794 Memory.Alignment != 0 )
798 bool isMemRegOffset() const {
799 if (!isMemory() || !Memory.OffsetRegNum || Memory.Alignment != 0)
803 bool isT2MemRegOffset() const {
804 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
805 Memory.Alignment != 0)
807 // Only lsl #{0, 1, 2, 3} allowed.
808 if (Memory.ShiftType == ARM_AM::no_shift)
810 if (Memory.ShiftType != ARM_AM::lsl || Memory.ShiftImm > 3)
814 bool isMemThumbRR() const {
815 // Thumb reg+reg addressing is simple. Just two registers, a base and
816 // an offset. No shifts, negations or any other complicating factors.
817 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
818 Memory.ShiftType != ARM_AM::no_shift || Memory.Alignment != 0)
820 return isARMLowRegister(Memory.BaseRegNum) &&
821 (!Memory.OffsetRegNum || isARMLowRegister(Memory.OffsetRegNum));
823 bool isMemThumbRIs4() const {
824 if (!isMemory() || Memory.OffsetRegNum != 0 ||
825 !isARMLowRegister(Memory.BaseRegNum) || Memory.Alignment != 0)
827 // Immediate offset, multiple of 4 in range [0, 124].
828 if (!Memory.OffsetImm) return true;
829 int64_t Val = Memory.OffsetImm->getValue();
830 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
832 bool isMemThumbRIs2() const {
833 if (!isMemory() || Memory.OffsetRegNum != 0 ||
834 !isARMLowRegister(Memory.BaseRegNum) || Memory.Alignment != 0)
836 // Immediate offset, multiple of 4 in range [0, 62].
837 if (!Memory.OffsetImm) return true;
838 int64_t Val = Memory.OffsetImm->getValue();
839 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
841 bool isMemThumbRIs1() const {
842 if (!isMemory() || Memory.OffsetRegNum != 0 ||
843 !isARMLowRegister(Memory.BaseRegNum) || Memory.Alignment != 0)
845 // Immediate offset in range [0, 31].
846 if (!Memory.OffsetImm) return true;
847 int64_t Val = Memory.OffsetImm->getValue();
848 return Val >= 0 && Val <= 31;
850 bool isMemThumbSPI() const {
851 if (!isMemory() || Memory.OffsetRegNum != 0 ||
852 Memory.BaseRegNum != ARM::SP || Memory.Alignment != 0)
854 // Immediate offset, multiple of 4 in range [0, 1020].
855 if (!Memory.OffsetImm) return true;
856 int64_t Val = Memory.OffsetImm->getValue();
857 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
859 bool isMemImm8s4Offset() const {
860 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
862 // Immediate offset a multiple of 4 in range [-1020, 1020].
863 if (!Memory.OffsetImm) return true;
864 int64_t Val = Memory.OffsetImm->getValue();
865 return Val >= -1020 && Val <= 1020 && (Val & 3) == 0;
867 bool isMemImm0_1020s4Offset() const {
868 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
870 // Immediate offset a multiple of 4 in range [0, 1020].
871 if (!Memory.OffsetImm) return true;
872 int64_t Val = Memory.OffsetImm->getValue();
873 return Val >= 0 && Val <= 1020 && (Val & 3) == 0;
875 bool isMemImm8Offset() const {
876 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
878 // Immediate offset in range [-255, 255].
879 if (!Memory.OffsetImm) return true;
880 int64_t Val = Memory.OffsetImm->getValue();
881 return (Val == INT32_MIN) || (Val > -256 && Val < 256);
883 bool isMemPosImm8Offset() const {
884 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
886 // Immediate offset in range [0, 255].
887 if (!Memory.OffsetImm) return true;
888 int64_t Val = Memory.OffsetImm->getValue();
889 return Val >= 0 && Val < 256;
891 bool isMemNegImm8Offset() const {
892 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
894 // Immediate offset in range [-255, -1].
895 if (!Memory.OffsetImm) return true;
896 int64_t Val = Memory.OffsetImm->getValue();
897 return Val > -256 && Val < 0;
899 bool isMemUImm12Offset() const {
900 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
902 // Immediate offset in range [0, 4095].
903 if (!Memory.OffsetImm) return true;
904 int64_t Val = Memory.OffsetImm->getValue();
905 return (Val >= 0 && Val < 4096);
907 bool isMemImm12Offset() const {
908 // If we have an immediate that's not a constant, treat it as a label
909 // reference needing a fixup. If it is a constant, it's something else
911 if (Kind == k_Immediate && !isa<MCConstantExpr>(getImm()))
914 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
916 // Immediate offset in range [-4095, 4095].
917 if (!Memory.OffsetImm) return true;
918 int64_t Val = Memory.OffsetImm->getValue();
919 return (Val > -4096 && Val < 4096) || (Val == INT32_MIN);
921 bool isPostIdxImm8() const {
922 if (Kind != k_Immediate)
924 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
925 if (!CE) return false;
926 int64_t Val = CE->getValue();
927 return (Val > -256 && Val < 256) || (Val == INT32_MIN);
929 bool isPostIdxImm8s4() const {
930 if (Kind != k_Immediate)
932 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
933 if (!CE) return false;
934 int64_t Val = CE->getValue();
935 return ((Val & 3) == 0 && Val >= -1020 && Val <= 1020) ||
939 bool isMSRMask() const { return Kind == k_MSRMask; }
940 bool isProcIFlags() const { return Kind == k_ProcIFlags; }
943 bool isVecListOneD() const {
944 if (Kind != k_VectorList) return false;
945 return VectorList.Count == 1;
948 bool isVecListTwoD() const {
949 if (Kind != k_VectorList) return false;
950 return VectorList.Count == 2;
953 bool isVecListThreeD() const {
954 if (Kind != k_VectorList) return false;
955 return VectorList.Count == 3;
958 bool isVecListFourD() const {
959 if (Kind != k_VectorList) return false;
960 return VectorList.Count == 4;
963 bool isVecListTwoQ() const {
964 if (Kind != k_VectorList) return false;
965 //FIXME: We haven't taught the parser to handle by-two register lists
966 // yet, so don't pretend to know one.
967 return VectorList.Count == 2 && false;
970 bool isVectorIndex8() const {
971 if (Kind != k_VectorIndex) return false;
972 return VectorIndex.Val < 8;
974 bool isVectorIndex16() const {
975 if (Kind != k_VectorIndex) return false;
976 return VectorIndex.Val < 4;
978 bool isVectorIndex32() const {
979 if (Kind != k_VectorIndex) return false;
980 return VectorIndex.Val < 2;
983 bool isNEONi8splat() const {
984 if (Kind != k_Immediate)
986 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
987 // Must be a constant.
988 if (!CE) return false;
989 int64_t Value = CE->getValue();
990 // i8 value splatted across 8 bytes. The immediate is just the 8 byte
992 return Value >= 0 && Value < 256;
995 bool isNEONi16splat() const {
996 if (Kind != k_Immediate)
998 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
999 // Must be a constant.
1000 if (!CE) return false;
1001 int64_t Value = CE->getValue();
1002 // i16 value in the range [0,255] or [0x0100, 0xff00]
1003 return (Value >= 0 && Value < 256) || (Value >= 0x0100 && Value <= 0xff00);
1006 bool isNEONi32splat() const {
1007 if (Kind != k_Immediate)
1009 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1010 // Must be a constant.
1011 if (!CE) return false;
1012 int64_t Value = CE->getValue();
1013 // i32 value with set bits only in one byte X000, 0X00, 00X0, or 000X.
1014 return (Value >= 0 && Value < 256) ||
1015 (Value >= 0x0100 && Value <= 0xff00) ||
1016 (Value >= 0x010000 && Value <= 0xff0000) ||
1017 (Value >= 0x01000000 && Value <= 0xff000000);
1020 bool isNEONi32vmov() const {
1021 if (Kind != k_Immediate)
1023 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1024 // Must be a constant.
1025 if (!CE) return false;
1026 int64_t Value = CE->getValue();
1027 // i32 value with set bits only in one byte X000, 0X00, 00X0, or 000X,
1028 // for VMOV/VMVN only, 00Xf or 0Xff are also accepted.
1029 return (Value >= 0 && Value < 256) ||
1030 (Value >= 0x0100 && Value <= 0xff00) ||
1031 (Value >= 0x010000 && Value <= 0xff0000) ||
1032 (Value >= 0x01000000 && Value <= 0xff000000) ||
1033 (Value >= 0x01ff && Value <= 0xffff && (Value & 0xff) == 0xff) ||
1034 (Value >= 0x01ffff && Value <= 0xffffff && (Value & 0xffff) == 0xffff);
1037 bool isNEONi64splat() const {
1038 if (Kind != k_Immediate)
1040 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1041 // Must be a constant.
1042 if (!CE) return false;
1043 uint64_t Value = CE->getValue();
1044 // i64 value with each byte being either 0 or 0xff.
1045 for (unsigned i = 0; i < 8; ++i)
1046 if ((Value & 0xff) != 0 && (Value & 0xff) != 0xff) return false;
1050 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
1051 // Add as immediates when possible. Null MCExpr = 0.
1053 Inst.addOperand(MCOperand::CreateImm(0));
1054 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
1055 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
1057 Inst.addOperand(MCOperand::CreateExpr(Expr));
1060 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
1061 assert(N == 2 && "Invalid number of operands!");
1062 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
1063 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
1064 Inst.addOperand(MCOperand::CreateReg(RegNum));
1067 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
1068 assert(N == 1 && "Invalid number of operands!");
1069 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
1072 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
1073 assert(N == 1 && "Invalid number of operands!");
1074 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
1077 void addCoprocOptionOperands(MCInst &Inst, unsigned N) const {
1078 assert(N == 1 && "Invalid number of operands!");
1079 Inst.addOperand(MCOperand::CreateImm(CoprocOption.Val));
1082 void addITMaskOperands(MCInst &Inst, unsigned N) const {
1083 assert(N == 1 && "Invalid number of operands!");
1084 Inst.addOperand(MCOperand::CreateImm(ITMask.Mask));
1087 void addITCondCodeOperands(MCInst &Inst, unsigned N) const {
1088 assert(N == 1 && "Invalid number of operands!");
1089 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
1092 void addCCOutOperands(MCInst &Inst, unsigned N) const {
1093 assert(N == 1 && "Invalid number of operands!");
1094 Inst.addOperand(MCOperand::CreateReg(getReg()));
1097 void addRegOperands(MCInst &Inst, unsigned N) const {
1098 assert(N == 1 && "Invalid number of operands!");
1099 Inst.addOperand(MCOperand::CreateReg(getReg()));
1102 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
1103 assert(N == 3 && "Invalid number of operands!");
1104 assert(isRegShiftedReg() &&
1105 "addRegShiftedRegOperands() on non RegShiftedReg!");
1106 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
1107 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
1108 Inst.addOperand(MCOperand::CreateImm(
1109 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
1112 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
1113 assert(N == 2 && "Invalid number of operands!");
1114 assert(isRegShiftedImm() &&
1115 "addRegShiftedImmOperands() on non RegShiftedImm!");
1116 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
1117 Inst.addOperand(MCOperand::CreateImm(
1118 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
1121 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
1122 assert(N == 1 && "Invalid number of operands!");
1123 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
1127 void addRegListOperands(MCInst &Inst, unsigned N) const {
1128 assert(N == 1 && "Invalid number of operands!");
1129 const SmallVectorImpl<unsigned> &RegList = getRegList();
1130 for (SmallVectorImpl<unsigned>::const_iterator
1131 I = RegList.begin(), E = RegList.end(); I != E; ++I)
1132 Inst.addOperand(MCOperand::CreateReg(*I));
1135 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
1136 addRegListOperands(Inst, N);
1139 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
1140 addRegListOperands(Inst, N);
1143 void addRotImmOperands(MCInst &Inst, unsigned N) const {
1144 assert(N == 1 && "Invalid number of operands!");
1145 // Encoded as val>>3. The printer handles display as 8, 16, 24.
1146 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
1149 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
1150 assert(N == 1 && "Invalid number of operands!");
1151 // Munge the lsb/width into a bitfield mask.
1152 unsigned lsb = Bitfield.LSB;
1153 unsigned width = Bitfield.Width;
1154 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
1155 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
1156 (32 - (lsb + width)));
1157 Inst.addOperand(MCOperand::CreateImm(Mask));
1160 void addImmOperands(MCInst &Inst, unsigned N) const {
1161 assert(N == 1 && "Invalid number of operands!");
1162 addExpr(Inst, getImm());
1165 void addFPImmOperands(MCInst &Inst, unsigned N) const {
1166 assert(N == 1 && "Invalid number of operands!");
1167 Inst.addOperand(MCOperand::CreateImm(getFPImm()));
1170 void addImm8s4Operands(MCInst &Inst, unsigned N) const {
1171 assert(N == 1 && "Invalid number of operands!");
1172 // FIXME: We really want to scale the value here, but the LDRD/STRD
1173 // instruction don't encode operands that way yet.
1174 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1175 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
1178 void addImm0_1020s4Operands(MCInst &Inst, unsigned N) const {
1179 assert(N == 1 && "Invalid number of operands!");
1180 // The immediate is scaled by four in the encoding and is stored
1181 // in the MCInst as such. Lop off the low two bits here.
1182 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1183 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
1186 void addImm0_508s4Operands(MCInst &Inst, unsigned N) const {
1187 assert(N == 1 && "Invalid number of operands!");
1188 // The immediate is scaled by four in the encoding and is stored
1189 // in the MCInst as such. Lop off the low two bits here.
1190 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1191 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
1194 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
1195 assert(N == 1 && "Invalid number of operands!");
1196 // The constant encodes as the immediate-1, and we store in the instruction
1197 // the bits as encoded, so subtract off one here.
1198 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1199 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
1202 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
1203 assert(N == 1 && "Invalid number of operands!");
1204 // The constant encodes as the immediate-1, and we store in the instruction
1205 // the bits as encoded, so subtract off one here.
1206 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1207 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
1210 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
1211 assert(N == 1 && "Invalid number of operands!");
1212 // The constant encodes as the immediate, except for 32, which encodes as
1214 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1215 unsigned Imm = CE->getValue();
1216 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
1219 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
1220 assert(N == 1 && "Invalid number of operands!");
1221 // An ASR value of 32 encodes as 0, so that's how we want to add it to
1222 // the instruction as well.
1223 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1224 int Val = CE->getValue();
1225 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
1228 void addT2SOImmNotOperands(MCInst &Inst, unsigned N) const {
1229 assert(N == 1 && "Invalid number of operands!");
1230 // The operand is actually a t2_so_imm, but we have its bitwise
1231 // negation in the assembly source, so twiddle it here.
1232 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1233 Inst.addOperand(MCOperand::CreateImm(~CE->getValue()));
1236 void addARMSOImmNotOperands(MCInst &Inst, unsigned N) const {
1237 assert(N == 1 && "Invalid number of operands!");
1238 // The operand is actually a so_imm, but we have its bitwise
1239 // negation in the assembly source, so twiddle it here.
1240 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1241 Inst.addOperand(MCOperand::CreateImm(~CE->getValue()));
1244 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
1245 assert(N == 1 && "Invalid number of operands!");
1246 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
1249 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
1250 assert(N == 1 && "Invalid number of operands!");
1251 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1254 void addAlignedMemoryOperands(MCInst &Inst, unsigned N) const {
1255 assert(N == 2 && "Invalid number of operands!");
1256 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1257 Inst.addOperand(MCOperand::CreateImm(Memory.Alignment));
1260 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
1261 assert(N == 3 && "Invalid number of operands!");
1262 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1263 if (!Memory.OffsetRegNum) {
1264 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1265 // Special case for #-0
1266 if (Val == INT32_MIN) Val = 0;
1267 if (Val < 0) Val = -Val;
1268 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1270 // For register offset, we encode the shift type and negation flag
1272 Val = ARM_AM::getAM2Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add,
1273 Memory.ShiftImm, Memory.ShiftType);
1275 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1276 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1277 Inst.addOperand(MCOperand::CreateImm(Val));
1280 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
1281 assert(N == 2 && "Invalid number of operands!");
1282 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1283 assert(CE && "non-constant AM2OffsetImm operand!");
1284 int32_t Val = CE->getValue();
1285 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1286 // Special case for #-0
1287 if (Val == INT32_MIN) Val = 0;
1288 if (Val < 0) Val = -Val;
1289 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1290 Inst.addOperand(MCOperand::CreateReg(0));
1291 Inst.addOperand(MCOperand::CreateImm(Val));
1294 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
1295 assert(N == 3 && "Invalid number of operands!");
1296 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1297 if (!Memory.OffsetRegNum) {
1298 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1299 // Special case for #-0
1300 if (Val == INT32_MIN) Val = 0;
1301 if (Val < 0) Val = -Val;
1302 Val = ARM_AM::getAM3Opc(AddSub, Val);
1304 // For register offset, we encode the shift type and negation flag
1306 Val = ARM_AM::getAM3Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
1308 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1309 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1310 Inst.addOperand(MCOperand::CreateImm(Val));
1313 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
1314 assert(N == 2 && "Invalid number of operands!");
1315 if (Kind == k_PostIndexRegister) {
1317 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
1318 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1319 Inst.addOperand(MCOperand::CreateImm(Val));
1324 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
1325 int32_t Val = CE->getValue();
1326 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1327 // Special case for #-0
1328 if (Val == INT32_MIN) Val = 0;
1329 if (Val < 0) Val = -Val;
1330 Val = ARM_AM::getAM3Opc(AddSub, Val);
1331 Inst.addOperand(MCOperand::CreateReg(0));
1332 Inst.addOperand(MCOperand::CreateImm(Val));
1335 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
1336 assert(N == 2 && "Invalid number of operands!");
1337 // If we have an immediate that's not a constant, treat it as a label
1338 // reference needing a fixup. If it is a constant, it's something else
1339 // and we reject it.
1341 Inst.addOperand(MCOperand::CreateExpr(getImm()));
1342 Inst.addOperand(MCOperand::CreateImm(0));
1346 // The lower two bits are always zero and as such are not encoded.
1347 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() / 4 : 0;
1348 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1349 // Special case for #-0
1350 if (Val == INT32_MIN) Val = 0;
1351 if (Val < 0) Val = -Val;
1352 Val = ARM_AM::getAM5Opc(AddSub, Val);
1353 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1354 Inst.addOperand(MCOperand::CreateImm(Val));
1357 void addMemImm8s4OffsetOperands(MCInst &Inst, unsigned N) const {
1358 assert(N == 2 && "Invalid number of operands!");
1359 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1360 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1361 Inst.addOperand(MCOperand::CreateImm(Val));
1364 void addMemImm0_1020s4OffsetOperands(MCInst &Inst, unsigned N) const {
1365 assert(N == 2 && "Invalid number of operands!");
1366 // The lower two bits are always zero and as such are not encoded.
1367 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() / 4 : 0;
1368 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1369 Inst.addOperand(MCOperand::CreateImm(Val));
1372 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1373 assert(N == 2 && "Invalid number of operands!");
1374 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1375 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1376 Inst.addOperand(MCOperand::CreateImm(Val));
1379 void addMemPosImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1380 addMemImm8OffsetOperands(Inst, N);
1383 void addMemNegImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1384 addMemImm8OffsetOperands(Inst, N);
1387 void addMemUImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1388 assert(N == 2 && "Invalid number of operands!");
1389 // If this is an immediate, it's a label reference.
1390 if (Kind == k_Immediate) {
1391 addExpr(Inst, getImm());
1392 Inst.addOperand(MCOperand::CreateImm(0));
1396 // Otherwise, it's a normal memory reg+offset.
1397 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1398 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1399 Inst.addOperand(MCOperand::CreateImm(Val));
1402 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1403 assert(N == 2 && "Invalid number of operands!");
1404 // If this is an immediate, it's a label reference.
1405 if (Kind == k_Immediate) {
1406 addExpr(Inst, getImm());
1407 Inst.addOperand(MCOperand::CreateImm(0));
1411 // Otherwise, it's a normal memory reg+offset.
1412 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1413 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1414 Inst.addOperand(MCOperand::CreateImm(Val));
1417 void addMemTBBOperands(MCInst &Inst, unsigned N) const {
1418 assert(N == 2 && "Invalid number of operands!");
1419 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1420 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1423 void addMemTBHOperands(MCInst &Inst, unsigned N) const {
1424 assert(N == 2 && "Invalid number of operands!");
1425 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1426 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1429 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1430 assert(N == 3 && "Invalid number of operands!");
1432 ARM_AM::getAM2Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add,
1433 Memory.ShiftImm, Memory.ShiftType);
1434 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1435 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1436 Inst.addOperand(MCOperand::CreateImm(Val));
1439 void addT2MemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1440 assert(N == 3 && "Invalid number of operands!");
1441 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1442 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1443 Inst.addOperand(MCOperand::CreateImm(Memory.ShiftImm));
1446 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1447 assert(N == 2 && "Invalid number of operands!");
1448 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1449 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1452 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1453 assert(N == 2 && "Invalid number of operands!");
1454 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 4) : 0;
1455 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1456 Inst.addOperand(MCOperand::CreateImm(Val));
1459 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1460 assert(N == 2 && "Invalid number of operands!");
1461 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 2) : 0;
1462 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1463 Inst.addOperand(MCOperand::CreateImm(Val));
1466 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1467 assert(N == 2 && "Invalid number of operands!");
1468 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue()) : 0;
1469 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1470 Inst.addOperand(MCOperand::CreateImm(Val));
1473 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1474 assert(N == 2 && "Invalid number of operands!");
1475 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 4) : 0;
1476 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1477 Inst.addOperand(MCOperand::CreateImm(Val));
1480 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1481 assert(N == 1 && "Invalid number of operands!");
1482 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1483 assert(CE && "non-constant post-idx-imm8 operand!");
1484 int Imm = CE->getValue();
1485 bool isAdd = Imm >= 0;
1486 if (Imm == INT32_MIN) Imm = 0;
1487 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1488 Inst.addOperand(MCOperand::CreateImm(Imm));
1491 void addPostIdxImm8s4Operands(MCInst &Inst, unsigned N) const {
1492 assert(N == 1 && "Invalid number of operands!");
1493 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1494 assert(CE && "non-constant post-idx-imm8s4 operand!");
1495 int Imm = CE->getValue();
1496 bool isAdd = Imm >= 0;
1497 if (Imm == INT32_MIN) Imm = 0;
1498 // Immediate is scaled by 4.
1499 Imm = ((Imm < 0 ? -Imm : Imm) / 4) | (int)isAdd << 8;
1500 Inst.addOperand(MCOperand::CreateImm(Imm));
1503 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1504 assert(N == 2 && "Invalid number of operands!");
1505 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1506 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1509 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1510 assert(N == 2 && "Invalid number of operands!");
1511 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1512 // The sign, shift type, and shift amount are encoded in a single operand
1513 // using the AM2 encoding helpers.
1514 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1515 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1516 PostIdxReg.ShiftTy);
1517 Inst.addOperand(MCOperand::CreateImm(Imm));
1520 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1521 assert(N == 1 && "Invalid number of operands!");
1522 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1525 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1526 assert(N == 1 && "Invalid number of operands!");
1527 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1530 void addVecListOperands(MCInst &Inst, unsigned N) const {
1531 assert(N == 1 && "Invalid number of operands!");
1532 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1535 void addVectorIndex8Operands(MCInst &Inst, unsigned N) const {
1536 assert(N == 1 && "Invalid number of operands!");
1537 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1540 void addVectorIndex16Operands(MCInst &Inst, unsigned N) const {
1541 assert(N == 1 && "Invalid number of operands!");
1542 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1545 void addVectorIndex32Operands(MCInst &Inst, unsigned N) const {
1546 assert(N == 1 && "Invalid number of operands!");
1547 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1550 void addNEONi8splatOperands(MCInst &Inst, unsigned N) const {
1551 assert(N == 1 && "Invalid number of operands!");
1552 // The immediate encodes the type of constant as well as the value.
1553 // Mask in that this is an i8 splat.
1554 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1555 Inst.addOperand(MCOperand::CreateImm(CE->getValue() | 0xe00));
1558 void addNEONi16splatOperands(MCInst &Inst, unsigned N) const {
1559 assert(N == 1 && "Invalid number of operands!");
1560 // The immediate encodes the type of constant as well as the value.
1561 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1562 unsigned Value = CE->getValue();
1564 Value = (Value >> 8) | 0xa00;
1567 Inst.addOperand(MCOperand::CreateImm(Value));
1570 void addNEONi32splatOperands(MCInst &Inst, unsigned N) const {
1571 assert(N == 1 && "Invalid number of operands!");
1572 // The immediate encodes the type of constant as well as the value.
1573 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1574 unsigned Value = CE->getValue();
1575 if (Value >= 256 && Value <= 0xff00)
1576 Value = (Value >> 8) | 0x200;
1577 else if (Value > 0xffff && Value <= 0xff0000)
1578 Value = (Value >> 16) | 0x400;
1579 else if (Value > 0xffffff)
1580 Value = (Value >> 24) | 0x600;
1581 Inst.addOperand(MCOperand::CreateImm(Value));
1584 void addNEONi32vmovOperands(MCInst &Inst, unsigned N) const {
1585 assert(N == 1 && "Invalid number of operands!");
1586 // The immediate encodes the type of constant as well as the value.
1587 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1588 unsigned Value = CE->getValue();
1589 if (Value >= 256 && Value <= 0xffff)
1590 Value = (Value >> 8) | ((Value & 0xff) ? 0xc00 : 0x200);
1591 else if (Value > 0xffff && Value <= 0xffffff)
1592 Value = (Value >> 16) | ((Value & 0xff) ? 0xd00 : 0x400);
1593 else if (Value > 0xffffff)
1594 Value = (Value >> 24) | 0x600;
1595 Inst.addOperand(MCOperand::CreateImm(Value));
1598 void addNEONi64splatOperands(MCInst &Inst, unsigned N) const {
1599 assert(N == 1 && "Invalid number of operands!");
1600 // The immediate encodes the type of constant as well as the value.
1601 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1602 uint64_t Value = CE->getValue();
1604 for (unsigned i = 0; i < 8; ++i, Value >>= 8) {
1605 Imm |= (Value & 1) << i;
1607 Inst.addOperand(MCOperand::CreateImm(Imm | 0x1e00));
1610 virtual void print(raw_ostream &OS) const;
1612 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1613 ARMOperand *Op = new ARMOperand(k_ITCondMask);
1614 Op->ITMask.Mask = Mask;
1620 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1621 ARMOperand *Op = new ARMOperand(k_CondCode);
1628 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1629 ARMOperand *Op = new ARMOperand(k_CoprocNum);
1630 Op->Cop.Val = CopVal;
1636 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1637 ARMOperand *Op = new ARMOperand(k_CoprocReg);
1638 Op->Cop.Val = CopVal;
1644 static ARMOperand *CreateCoprocOption(unsigned Val, SMLoc S, SMLoc E) {
1645 ARMOperand *Op = new ARMOperand(k_CoprocOption);
1652 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1653 ARMOperand *Op = new ARMOperand(k_CCOut);
1654 Op->Reg.RegNum = RegNum;
1660 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1661 ARMOperand *Op = new ARMOperand(k_Token);
1662 Op->Tok.Data = Str.data();
1663 Op->Tok.Length = Str.size();
1669 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1670 ARMOperand *Op = new ARMOperand(k_Register);
1671 Op->Reg.RegNum = RegNum;
1677 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1682 ARMOperand *Op = new ARMOperand(k_ShiftedRegister);
1683 Op->RegShiftedReg.ShiftTy = ShTy;
1684 Op->RegShiftedReg.SrcReg = SrcReg;
1685 Op->RegShiftedReg.ShiftReg = ShiftReg;
1686 Op->RegShiftedReg.ShiftImm = ShiftImm;
1692 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1696 ARMOperand *Op = new ARMOperand(k_ShiftedImmediate);
1697 Op->RegShiftedImm.ShiftTy = ShTy;
1698 Op->RegShiftedImm.SrcReg = SrcReg;
1699 Op->RegShiftedImm.ShiftImm = ShiftImm;
1705 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1707 ARMOperand *Op = new ARMOperand(k_ShifterImmediate);
1708 Op->ShifterImm.isASR = isASR;
1709 Op->ShifterImm.Imm = Imm;
1715 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1716 ARMOperand *Op = new ARMOperand(k_RotateImmediate);
1717 Op->RotImm.Imm = Imm;
1723 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1725 ARMOperand *Op = new ARMOperand(k_BitfieldDescriptor);
1726 Op->Bitfield.LSB = LSB;
1727 Op->Bitfield.Width = Width;
1734 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1735 SMLoc StartLoc, SMLoc EndLoc) {
1736 KindTy Kind = k_RegisterList;
1738 if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Regs.front().first))
1739 Kind = k_DPRRegisterList;
1740 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].
1741 contains(Regs.front().first))
1742 Kind = k_SPRRegisterList;
1744 ARMOperand *Op = new ARMOperand(Kind);
1745 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1746 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1747 Op->Registers.push_back(I->first);
1748 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1749 Op->StartLoc = StartLoc;
1750 Op->EndLoc = EndLoc;
1754 static ARMOperand *CreateVectorList(unsigned RegNum, unsigned Count,
1756 ARMOperand *Op = new ARMOperand(k_VectorList);
1757 Op->VectorList.RegNum = RegNum;
1758 Op->VectorList.Count = Count;
1764 static ARMOperand *CreateVectorIndex(unsigned Idx, SMLoc S, SMLoc E,
1766 ARMOperand *Op = new ARMOperand(k_VectorIndex);
1767 Op->VectorIndex.Val = Idx;
1773 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1774 ARMOperand *Op = new ARMOperand(k_Immediate);
1781 static ARMOperand *CreateFPImm(unsigned Val, SMLoc S, MCContext &Ctx) {
1782 ARMOperand *Op = new ARMOperand(k_FPImmediate);
1783 Op->FPImm.Val = Val;
1789 static ARMOperand *CreateMem(unsigned BaseRegNum,
1790 const MCConstantExpr *OffsetImm,
1791 unsigned OffsetRegNum,
1792 ARM_AM::ShiftOpc ShiftType,
1797 ARMOperand *Op = new ARMOperand(k_Memory);
1798 Op->Memory.BaseRegNum = BaseRegNum;
1799 Op->Memory.OffsetImm = OffsetImm;
1800 Op->Memory.OffsetRegNum = OffsetRegNum;
1801 Op->Memory.ShiftType = ShiftType;
1802 Op->Memory.ShiftImm = ShiftImm;
1803 Op->Memory.Alignment = Alignment;
1804 Op->Memory.isNegative = isNegative;
1810 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1811 ARM_AM::ShiftOpc ShiftTy,
1814 ARMOperand *Op = new ARMOperand(k_PostIndexRegister);
1815 Op->PostIdxReg.RegNum = RegNum;
1816 Op->PostIdxReg.isAdd = isAdd;
1817 Op->PostIdxReg.ShiftTy = ShiftTy;
1818 Op->PostIdxReg.ShiftImm = ShiftImm;
1824 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1825 ARMOperand *Op = new ARMOperand(k_MemBarrierOpt);
1826 Op->MBOpt.Val = Opt;
1832 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1833 ARMOperand *Op = new ARMOperand(k_ProcIFlags);
1834 Op->IFlags.Val = IFlags;
1840 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1841 ARMOperand *Op = new ARMOperand(k_MSRMask);
1842 Op->MMask.Val = MMask;
1849 } // end anonymous namespace.
1851 void ARMOperand::print(raw_ostream &OS) const {
1854 OS << "<fpimm " << getFPImm() << "(" << ARM_AM::getFPImmFloat(getFPImm())
1858 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1861 OS << "<ccout " << getReg() << ">";
1863 case k_ITCondMask: {
1864 static const char *MaskStr[] = {
1865 "()", "(t)", "(e)", "(tt)", "(et)", "(te)", "(ee)", "(ttt)", "(ett)",
1866 "(tet)", "(eet)", "(tte)", "(ete)", "(tee)", "(eee)"
1868 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1869 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1873 OS << "<coprocessor number: " << getCoproc() << ">";
1876 OS << "<coprocessor register: " << getCoproc() << ">";
1878 case k_CoprocOption:
1879 OS << "<coprocessor option: " << CoprocOption.Val << ">";
1882 OS << "<mask: " << getMSRMask() << ">";
1885 getImm()->print(OS);
1887 case k_MemBarrierOpt:
1888 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1892 << " base:" << Memory.BaseRegNum;
1895 case k_PostIndexRegister:
1896 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1897 << PostIdxReg.RegNum;
1898 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1899 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1900 << PostIdxReg.ShiftImm;
1903 case k_ProcIFlags: {
1904 OS << "<ARM_PROC::";
1905 unsigned IFlags = getProcIFlags();
1906 for (int i=2; i >= 0; --i)
1907 if (IFlags & (1 << i))
1908 OS << ARM_PROC::IFlagsToString(1 << i);
1913 OS << "<register " << getReg() << ">";
1915 case k_ShifterImmediate:
1916 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1917 << " #" << ShifterImm.Imm << ">";
1919 case k_ShiftedRegister:
1920 OS << "<so_reg_reg "
1921 << RegShiftedReg.SrcReg << " "
1922 << ARM_AM::getShiftOpcStr(RegShiftedReg.ShiftTy)
1923 << " " << RegShiftedReg.ShiftReg << ">";
1925 case k_ShiftedImmediate:
1926 OS << "<so_reg_imm "
1927 << RegShiftedImm.SrcReg << " "
1928 << ARM_AM::getShiftOpcStr(RegShiftedImm.ShiftTy)
1929 << " #" << RegShiftedImm.ShiftImm << ">";
1931 case k_RotateImmediate:
1932 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1934 case k_BitfieldDescriptor:
1935 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1936 << ", width: " << Bitfield.Width << ">";
1938 case k_RegisterList:
1939 case k_DPRRegisterList:
1940 case k_SPRRegisterList: {
1941 OS << "<register_list ";
1943 const SmallVectorImpl<unsigned> &RegList = getRegList();
1944 for (SmallVectorImpl<unsigned>::const_iterator
1945 I = RegList.begin(), E = RegList.end(); I != E; ) {
1947 if (++I < E) OS << ", ";
1954 OS << "<vector_list " << VectorList.Count << " * "
1955 << VectorList.RegNum << ">";
1958 OS << "'" << getToken() << "'";
1961 OS << "<vectorindex " << getVectorIndex() << ">";
1966 /// @name Auto-generated Match Functions
1969 static unsigned MatchRegisterName(StringRef Name);
1973 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1974 SMLoc &StartLoc, SMLoc &EndLoc) {
1975 RegNo = tryParseRegister();
1977 return (RegNo == (unsigned)-1);
1980 /// Try to parse a register name. The token must be an Identifier when called,
1981 /// and if it is a register name the token is eaten and the register number is
1982 /// returned. Otherwise return -1.
1984 int ARMAsmParser::tryParseRegister() {
1985 const AsmToken &Tok = Parser.getTok();
1986 if (Tok.isNot(AsmToken::Identifier)) return -1;
1988 // FIXME: Validate register for the current architecture; we have to do
1989 // validation later, so maybe there is no need for this here.
1990 std::string lowerCase = Tok.getString().lower();
1991 unsigned RegNum = MatchRegisterName(lowerCase);
1993 RegNum = StringSwitch<unsigned>(lowerCase)
1994 .Case("r13", ARM::SP)
1995 .Case("r14", ARM::LR)
1996 .Case("r15", ARM::PC)
1997 .Case("ip", ARM::R12)
2000 if (!RegNum) return -1;
2002 Parser.Lex(); // Eat identifier token.
2007 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
2008 // If a recoverable error occurs, return 1. If an irrecoverable error
2009 // occurs, return -1. An irrecoverable error is one where tokens have been
2010 // consumed in the process of trying to parse the shifter (i.e., when it is
2011 // indeed a shifter operand, but malformed).
2012 int ARMAsmParser::tryParseShiftRegister(
2013 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2014 SMLoc S = Parser.getTok().getLoc();
2015 const AsmToken &Tok = Parser.getTok();
2016 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2018 std::string lowerCase = Tok.getString().lower();
2019 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
2020 .Case("lsl", ARM_AM::lsl)
2021 .Case("lsr", ARM_AM::lsr)
2022 .Case("asr", ARM_AM::asr)
2023 .Case("ror", ARM_AM::ror)
2024 .Case("rrx", ARM_AM::rrx)
2025 .Default(ARM_AM::no_shift);
2027 if (ShiftTy == ARM_AM::no_shift)
2030 Parser.Lex(); // Eat the operator.
2032 // The source register for the shift has already been added to the
2033 // operand list, so we need to pop it off and combine it into the shifted
2034 // register operand instead.
2035 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
2036 if (!PrevOp->isReg())
2037 return Error(PrevOp->getStartLoc(), "shift must be of a register");
2038 int SrcReg = PrevOp->getReg();
2041 if (ShiftTy == ARM_AM::rrx) {
2042 // RRX Doesn't have an explicit shift amount. The encoder expects
2043 // the shift register to be the same as the source register. Seems odd,
2047 // Figure out if this is shifted by a constant or a register (for non-RRX).
2048 if (Parser.getTok().is(AsmToken::Hash)) {
2049 Parser.Lex(); // Eat hash.
2050 SMLoc ImmLoc = Parser.getTok().getLoc();
2051 const MCExpr *ShiftExpr = 0;
2052 if (getParser().ParseExpression(ShiftExpr)) {
2053 Error(ImmLoc, "invalid immediate shift value");
2056 // The expression must be evaluatable as an immediate.
2057 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
2059 Error(ImmLoc, "invalid immediate shift value");
2062 // Range check the immediate.
2063 // lsl, ror: 0 <= imm <= 31
2064 // lsr, asr: 0 <= imm <= 32
2065 Imm = CE->getValue();
2067 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
2068 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
2069 Error(ImmLoc, "immediate shift value out of range");
2072 } else if (Parser.getTok().is(AsmToken::Identifier)) {
2073 ShiftReg = tryParseRegister();
2074 SMLoc L = Parser.getTok().getLoc();
2075 if (ShiftReg == -1) {
2076 Error (L, "expected immediate or register in shift operand");
2080 Error (Parser.getTok().getLoc(),
2081 "expected immediate or register in shift operand");
2086 if (ShiftReg && ShiftTy != ARM_AM::rrx)
2087 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
2089 S, Parser.getTok().getLoc()));
2091 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
2092 S, Parser.getTok().getLoc()));
2098 /// Try to parse a register name. The token must be an Identifier when called.
2099 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
2100 /// if there is a "writeback". 'true' if it's not a register.
2102 /// TODO this is likely to change to allow different register types and or to
2103 /// parse for a specific register type.
2105 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2106 SMLoc S = Parser.getTok().getLoc();
2107 int RegNo = tryParseRegister();
2111 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
2113 const AsmToken &ExclaimTok = Parser.getTok();
2114 if (ExclaimTok.is(AsmToken::Exclaim)) {
2115 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
2116 ExclaimTok.getLoc()));
2117 Parser.Lex(); // Eat exclaim token
2121 // Also check for an index operand. This is only legal for vector registers,
2122 // but that'll get caught OK in operand matching, so we don't need to
2123 // explicitly filter everything else out here.
2124 if (Parser.getTok().is(AsmToken::LBrac)) {
2125 SMLoc SIdx = Parser.getTok().getLoc();
2126 Parser.Lex(); // Eat left bracket token.
2128 const MCExpr *ImmVal;
2129 if (getParser().ParseExpression(ImmVal))
2130 return MatchOperand_ParseFail;
2131 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
2133 TokError("immediate value expected for vector index");
2134 return MatchOperand_ParseFail;
2137 SMLoc E = Parser.getTok().getLoc();
2138 if (Parser.getTok().isNot(AsmToken::RBrac)) {
2139 Error(E, "']' expected");
2140 return MatchOperand_ParseFail;
2143 Parser.Lex(); // Eat right bracket token.
2145 Operands.push_back(ARMOperand::CreateVectorIndex(MCE->getValue(),
2153 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
2154 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
2156 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
2157 // Use the same layout as the tablegen'erated register name matcher. Ugly,
2159 switch (Name.size()) {
2162 if (Name[0] != CoprocOp)
2179 if (Name[0] != CoprocOp || Name[1] != '1')
2183 case '0': return 10;
2184 case '1': return 11;
2185 case '2': return 12;
2186 case '3': return 13;
2187 case '4': return 14;
2188 case '5': return 15;
2196 /// parseITCondCode - Try to parse a condition code for an IT instruction.
2197 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2198 parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2199 SMLoc S = Parser.getTok().getLoc();
2200 const AsmToken &Tok = Parser.getTok();
2201 if (!Tok.is(AsmToken::Identifier))
2202 return MatchOperand_NoMatch;
2203 unsigned CC = StringSwitch<unsigned>(Tok.getString())
2204 .Case("eq", ARMCC::EQ)
2205 .Case("ne", ARMCC::NE)
2206 .Case("hs", ARMCC::HS)
2207 .Case("cs", ARMCC::HS)
2208 .Case("lo", ARMCC::LO)
2209 .Case("cc", ARMCC::LO)
2210 .Case("mi", ARMCC::MI)
2211 .Case("pl", ARMCC::PL)
2212 .Case("vs", ARMCC::VS)
2213 .Case("vc", ARMCC::VC)
2214 .Case("hi", ARMCC::HI)
2215 .Case("ls", ARMCC::LS)
2216 .Case("ge", ARMCC::GE)
2217 .Case("lt", ARMCC::LT)
2218 .Case("gt", ARMCC::GT)
2219 .Case("le", ARMCC::LE)
2220 .Case("al", ARMCC::AL)
2223 return MatchOperand_NoMatch;
2224 Parser.Lex(); // Eat the token.
2226 Operands.push_back(ARMOperand::CreateCondCode(ARMCC::CondCodes(CC), S));
2228 return MatchOperand_Success;
2231 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
2232 /// token must be an Identifier when called, and if it is a coprocessor
2233 /// number, the token is eaten and the operand is added to the operand list.
2234 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2235 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2236 SMLoc S = Parser.getTok().getLoc();
2237 const AsmToken &Tok = Parser.getTok();
2238 if (Tok.isNot(AsmToken::Identifier))
2239 return MatchOperand_NoMatch;
2241 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
2243 return MatchOperand_NoMatch;
2245 Parser.Lex(); // Eat identifier token.
2246 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
2247 return MatchOperand_Success;
2250 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
2251 /// token must be an Identifier when called, and if it is a coprocessor
2252 /// number, the token is eaten and the operand is added to the operand list.
2253 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2254 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2255 SMLoc S = Parser.getTok().getLoc();
2256 const AsmToken &Tok = Parser.getTok();
2257 if (Tok.isNot(AsmToken::Identifier))
2258 return MatchOperand_NoMatch;
2260 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
2262 return MatchOperand_NoMatch;
2264 Parser.Lex(); // Eat identifier token.
2265 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
2266 return MatchOperand_Success;
2269 /// parseCoprocOptionOperand - Try to parse an coprocessor option operand.
2270 /// coproc_option : '{' imm0_255 '}'
2271 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2272 parseCoprocOptionOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2273 SMLoc S = Parser.getTok().getLoc();
2275 // If this isn't a '{', this isn't a coprocessor immediate operand.
2276 if (Parser.getTok().isNot(AsmToken::LCurly))
2277 return MatchOperand_NoMatch;
2278 Parser.Lex(); // Eat the '{'
2281 SMLoc Loc = Parser.getTok().getLoc();
2282 if (getParser().ParseExpression(Expr)) {
2283 Error(Loc, "illegal expression");
2284 return MatchOperand_ParseFail;
2286 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2287 if (!CE || CE->getValue() < 0 || CE->getValue() > 255) {
2288 Error(Loc, "coprocessor option must be an immediate in range [0, 255]");
2289 return MatchOperand_ParseFail;
2291 int Val = CE->getValue();
2293 // Check for and consume the closing '}'
2294 if (Parser.getTok().isNot(AsmToken::RCurly))
2295 return MatchOperand_ParseFail;
2296 SMLoc E = Parser.getTok().getLoc();
2297 Parser.Lex(); // Eat the '}'
2299 Operands.push_back(ARMOperand::CreateCoprocOption(Val, S, E));
2300 return MatchOperand_Success;
2303 // For register list parsing, we need to map from raw GPR register numbering
2304 // to the enumeration values. The enumeration values aren't sorted by
2305 // register number due to our using "sp", "lr" and "pc" as canonical names.
2306 static unsigned getNextRegister(unsigned Reg) {
2307 // If this is a GPR, we need to do it manually, otherwise we can rely
2308 // on the sort ordering of the enumeration since the other reg-classes
2310 if (!ARMMCRegisterClasses[ARM::GPRRegClassID].contains(Reg))
2313 default: assert(0 && "Invalid GPR number!");
2314 case ARM::R0: return ARM::R1; case ARM::R1: return ARM::R2;
2315 case ARM::R2: return ARM::R3; case ARM::R3: return ARM::R4;
2316 case ARM::R4: return ARM::R5; case ARM::R5: return ARM::R6;
2317 case ARM::R6: return ARM::R7; case ARM::R7: return ARM::R8;
2318 case ARM::R8: return ARM::R9; case ARM::R9: return ARM::R10;
2319 case ARM::R10: return ARM::R11; case ARM::R11: return ARM::R12;
2320 case ARM::R12: return ARM::SP; case ARM::SP: return ARM::LR;
2321 case ARM::LR: return ARM::PC; case ARM::PC: return ARM::R0;
2325 // Return the low-subreg of a given Q register.
2326 static unsigned getDRegFromQReg(unsigned QReg) {
2328 default: llvm_unreachable("expected a Q register!");
2329 case ARM::Q0: return ARM::D0;
2330 case ARM::Q1: return ARM::D2;
2331 case ARM::Q2: return ARM::D4;
2332 case ARM::Q3: return ARM::D6;
2333 case ARM::Q4: return ARM::D8;
2334 case ARM::Q5: return ARM::D10;
2335 case ARM::Q6: return ARM::D12;
2336 case ARM::Q7: return ARM::D14;
2337 case ARM::Q8: return ARM::D16;
2338 case ARM::Q9: return ARM::D18;
2339 case ARM::Q10: return ARM::D20;
2340 case ARM::Q11: return ARM::D22;
2341 case ARM::Q12: return ARM::D24;
2342 case ARM::Q13: return ARM::D26;
2343 case ARM::Q14: return ARM::D28;
2344 case ARM::Q15: return ARM::D30;
2348 /// Parse a register list.
2350 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2351 assert(Parser.getTok().is(AsmToken::LCurly) &&
2352 "Token is not a Left Curly Brace");
2353 SMLoc S = Parser.getTok().getLoc();
2354 Parser.Lex(); // Eat '{' token.
2355 SMLoc RegLoc = Parser.getTok().getLoc();
2357 // Check the first register in the list to see what register class
2358 // this is a list of.
2359 int Reg = tryParseRegister();
2361 return Error(RegLoc, "register expected");
2363 // The reglist instructions have at most 16 registers, so reserve
2364 // space for that many.
2365 SmallVector<std::pair<unsigned, SMLoc>, 16> Registers;
2367 // Allow Q regs and just interpret them as the two D sub-registers.
2368 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2369 Reg = getDRegFromQReg(Reg);
2370 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2373 const MCRegisterClass *RC;
2374 if (ARMMCRegisterClasses[ARM::GPRRegClassID].contains(Reg))
2375 RC = &ARMMCRegisterClasses[ARM::GPRRegClassID];
2376 else if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg))
2377 RC = &ARMMCRegisterClasses[ARM::DPRRegClassID];
2378 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].contains(Reg))
2379 RC = &ARMMCRegisterClasses[ARM::SPRRegClassID];
2381 return Error(RegLoc, "invalid register in register list");
2383 // Store the register.
2384 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2386 // This starts immediately after the first register token in the list,
2387 // so we can see either a comma or a minus (range separator) as a legal
2389 while (Parser.getTok().is(AsmToken::Comma) ||
2390 Parser.getTok().is(AsmToken::Minus)) {
2391 if (Parser.getTok().is(AsmToken::Minus)) {
2392 Parser.Lex(); // Eat the minus.
2393 SMLoc EndLoc = Parser.getTok().getLoc();
2394 int EndReg = tryParseRegister();
2396 return Error(EndLoc, "register expected");
2397 // Allow Q regs and just interpret them as the two D sub-registers.
2398 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(EndReg))
2399 EndReg = getDRegFromQReg(EndReg) + 1;
2400 // If the register is the same as the start reg, there's nothing
2404 // The register must be in the same register class as the first.
2405 if (!RC->contains(EndReg))
2406 return Error(EndLoc, "invalid register in register list");
2407 // Ranges must go from low to high.
2408 if (getARMRegisterNumbering(Reg) > getARMRegisterNumbering(EndReg))
2409 return Error(EndLoc, "bad range in register list");
2411 // Add all the registers in the range to the register list.
2412 while (Reg != EndReg) {
2413 Reg = getNextRegister(Reg);
2414 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2418 Parser.Lex(); // Eat the comma.
2419 RegLoc = Parser.getTok().getLoc();
2421 Reg = tryParseRegister();
2423 return Error(RegLoc, "register expected");
2424 // Allow Q regs and just interpret them as the two D sub-registers.
2425 bool isQReg = false;
2426 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2427 Reg = getDRegFromQReg(Reg);
2430 // The register must be in the same register class as the first.
2431 if (!RC->contains(Reg))
2432 return Error(RegLoc, "invalid register in register list");
2433 // List must be monotonically increasing.
2434 if (getARMRegisterNumbering(Reg) <= getARMRegisterNumbering(OldReg))
2435 return Error(RegLoc, "register list not in ascending order");
2436 // VFP register lists must also be contiguous.
2437 // It's OK to use the enumeration values directly here rather, as the
2438 // VFP register classes have the enum sorted properly.
2439 if (RC != &ARMMCRegisterClasses[ARM::GPRRegClassID] &&
2441 return Error(RegLoc, "non-contiguous register range");
2442 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2444 Registers.push_back(std::pair<unsigned, SMLoc>(++Reg, RegLoc));
2447 SMLoc E = Parser.getTok().getLoc();
2448 if (Parser.getTok().isNot(AsmToken::RCurly))
2449 return Error(E, "'}' expected");
2450 Parser.Lex(); // Eat '}' token.
2452 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
2456 // parse a vector register list
2457 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2458 parseVectorList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2459 SMLoc S = Parser.getTok().getLoc();
2460 // As an extension (to match gas), support a plain D register or Q register
2461 // (without encosing curly braces) as a single or double entry list,
2463 if (Parser.getTok().is(AsmToken::Identifier)) {
2464 int Reg = tryParseRegister();
2466 return MatchOperand_NoMatch;
2467 SMLoc E = Parser.getTok().getLoc();
2468 if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg)) {
2469 Operands.push_back(ARMOperand::CreateVectorList(Reg, 1, S, E));
2470 return MatchOperand_Success;
2472 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2473 Reg = getDRegFromQReg(Reg);
2474 Operands.push_back(ARMOperand::CreateVectorList(Reg, 2, S, E));
2475 return MatchOperand_Success;
2477 Error(S, "vector register expected");
2478 return MatchOperand_ParseFail;
2481 if (Parser.getTok().isNot(AsmToken::LCurly))
2482 return MatchOperand_NoMatch;
2484 Parser.Lex(); // Eat '{' token.
2485 SMLoc RegLoc = Parser.getTok().getLoc();
2487 int Reg = tryParseRegister();
2489 Error(RegLoc, "register expected");
2490 return MatchOperand_ParseFail;
2493 unsigned FirstReg = Reg;
2494 // The list is of D registers, but we also allow Q regs and just interpret
2495 // them as the two D sub-registers.
2496 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2497 FirstReg = Reg = getDRegFromQReg(Reg);
2502 while (Parser.getTok().is(AsmToken::Comma) ||
2503 Parser.getTok().is(AsmToken::Minus)) {
2504 if (Parser.getTok().is(AsmToken::Minus)) {
2505 Parser.Lex(); // Eat the minus.
2506 SMLoc EndLoc = Parser.getTok().getLoc();
2507 int EndReg = tryParseRegister();
2509 Error(EndLoc, "register expected");
2510 return MatchOperand_ParseFail;
2512 // Allow Q regs and just interpret them as the two D sub-registers.
2513 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(EndReg))
2514 EndReg = getDRegFromQReg(EndReg) + 1;
2515 // If the register is the same as the start reg, there's nothing
2519 // The register must be in the same register class as the first.
2520 if (!ARMMCRegisterClasses[ARM::DPRRegClassID].contains(EndReg)) {
2521 Error(EndLoc, "invalid register in register list");
2522 return MatchOperand_ParseFail;
2524 // Ranges must go from low to high.
2526 Error(EndLoc, "bad range in register list");
2527 return MatchOperand_ParseFail;
2530 // Add all the registers in the range to the register list.
2531 Count += EndReg - Reg;
2535 Parser.Lex(); // Eat the comma.
2536 RegLoc = Parser.getTok().getLoc();
2538 Reg = tryParseRegister();
2540 Error(RegLoc, "register expected");
2541 return MatchOperand_ParseFail;
2543 // vector register lists must be contiguous.
2544 // It's OK to use the enumeration values directly here rather, as the
2545 // VFP register classes have the enum sorted properly.
2547 // The list is of D registers, but we also allow Q regs and just interpret
2548 // them as the two D sub-registers.
2549 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2550 Reg = getDRegFromQReg(Reg);
2551 if (Reg != OldReg + 1) {
2552 Error(RegLoc, "non-contiguous register range");
2553 return MatchOperand_ParseFail;
2559 // Normal D register. Just check that it's contiguous and keep going.
2560 if (Reg != OldReg + 1) {
2561 Error(RegLoc, "non-contiguous register range");
2562 return MatchOperand_ParseFail;
2567 SMLoc E = Parser.getTok().getLoc();
2568 if (Parser.getTok().isNot(AsmToken::RCurly)) {
2569 Error(E, "'}' expected");
2570 return MatchOperand_ParseFail;
2572 Parser.Lex(); // Eat '}' token.
2574 Operands.push_back(ARMOperand::CreateVectorList(FirstReg, Count, S, E));
2575 return MatchOperand_Success;
2578 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
2579 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2580 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2581 SMLoc S = Parser.getTok().getLoc();
2582 const AsmToken &Tok = Parser.getTok();
2583 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2584 StringRef OptStr = Tok.getString();
2586 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
2587 .Case("sy", ARM_MB::SY)
2588 .Case("st", ARM_MB::ST)
2589 .Case("sh", ARM_MB::ISH)
2590 .Case("ish", ARM_MB::ISH)
2591 .Case("shst", ARM_MB::ISHST)
2592 .Case("ishst", ARM_MB::ISHST)
2593 .Case("nsh", ARM_MB::NSH)
2594 .Case("un", ARM_MB::NSH)
2595 .Case("nshst", ARM_MB::NSHST)
2596 .Case("unst", ARM_MB::NSHST)
2597 .Case("osh", ARM_MB::OSH)
2598 .Case("oshst", ARM_MB::OSHST)
2602 return MatchOperand_NoMatch;
2604 Parser.Lex(); // Eat identifier token.
2605 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
2606 return MatchOperand_Success;
2609 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
2610 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2611 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2612 SMLoc S = Parser.getTok().getLoc();
2613 const AsmToken &Tok = Parser.getTok();
2614 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2615 StringRef IFlagsStr = Tok.getString();
2617 // An iflags string of "none" is interpreted to mean that none of the AIF
2618 // bits are set. Not a terribly useful instruction, but a valid encoding.
2619 unsigned IFlags = 0;
2620 if (IFlagsStr != "none") {
2621 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
2622 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
2623 .Case("a", ARM_PROC::A)
2624 .Case("i", ARM_PROC::I)
2625 .Case("f", ARM_PROC::F)
2628 // If some specific iflag is already set, it means that some letter is
2629 // present more than once, this is not acceptable.
2630 if (Flag == ~0U || (IFlags & Flag))
2631 return MatchOperand_NoMatch;
2637 Parser.Lex(); // Eat identifier token.
2638 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
2639 return MatchOperand_Success;
2642 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
2643 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2644 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2645 SMLoc S = Parser.getTok().getLoc();
2646 const AsmToken &Tok = Parser.getTok();
2647 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2648 StringRef Mask = Tok.getString();
2651 // See ARMv6-M 10.1.1
2652 unsigned FlagsVal = StringSwitch<unsigned>(Mask)
2662 .Case("primask", 16)
2663 .Case("basepri", 17)
2664 .Case("basepri_max", 18)
2665 .Case("faultmask", 19)
2666 .Case("control", 20)
2669 if (FlagsVal == ~0U)
2670 return MatchOperand_NoMatch;
2672 if (!hasV7Ops() && FlagsVal >= 17 && FlagsVal <= 19)
2673 // basepri, basepri_max and faultmask only valid for V7m.
2674 return MatchOperand_NoMatch;
2676 Parser.Lex(); // Eat identifier token.
2677 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2678 return MatchOperand_Success;
2681 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
2682 size_t Start = 0, Next = Mask.find('_');
2683 StringRef Flags = "";
2684 std::string SpecReg = Mask.slice(Start, Next).lower();
2685 if (Next != StringRef::npos)
2686 Flags = Mask.slice(Next+1, Mask.size());
2688 // FlagsVal contains the complete mask:
2690 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2691 unsigned FlagsVal = 0;
2693 if (SpecReg == "apsr") {
2694 FlagsVal = StringSwitch<unsigned>(Flags)
2695 .Case("nzcvq", 0x8) // same as CPSR_f
2696 .Case("g", 0x4) // same as CPSR_s
2697 .Case("nzcvqg", 0xc) // same as CPSR_fs
2700 if (FlagsVal == ~0U) {
2702 return MatchOperand_NoMatch;
2704 FlagsVal = 8; // No flag
2706 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
2707 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
2709 for (int i = 0, e = Flags.size(); i != e; ++i) {
2710 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
2717 // If some specific flag is already set, it means that some letter is
2718 // present more than once, this is not acceptable.
2719 if (FlagsVal == ~0U || (FlagsVal & Flag))
2720 return MatchOperand_NoMatch;
2723 } else // No match for special register.
2724 return MatchOperand_NoMatch;
2726 // Special register without flags is NOT equivalent to "fc" flags.
2727 // NOTE: This is a divergence from gas' behavior. Uncommenting the following
2728 // two lines would enable gas compatibility at the expense of breaking
2734 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2735 if (SpecReg == "spsr")
2738 Parser.Lex(); // Eat identifier token.
2739 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2740 return MatchOperand_Success;
2743 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2744 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
2745 int Low, int High) {
2746 const AsmToken &Tok = Parser.getTok();
2747 if (Tok.isNot(AsmToken::Identifier)) {
2748 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2749 return MatchOperand_ParseFail;
2751 StringRef ShiftName = Tok.getString();
2752 std::string LowerOp = Op.lower();
2753 std::string UpperOp = Op.upper();
2754 if (ShiftName != LowerOp && ShiftName != UpperOp) {
2755 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2756 return MatchOperand_ParseFail;
2758 Parser.Lex(); // Eat shift type token.
2760 // There must be a '#' and a shift amount.
2761 if (Parser.getTok().isNot(AsmToken::Hash)) {
2762 Error(Parser.getTok().getLoc(), "'#' expected");
2763 return MatchOperand_ParseFail;
2765 Parser.Lex(); // Eat hash token.
2767 const MCExpr *ShiftAmount;
2768 SMLoc Loc = Parser.getTok().getLoc();
2769 if (getParser().ParseExpression(ShiftAmount)) {
2770 Error(Loc, "illegal expression");
2771 return MatchOperand_ParseFail;
2773 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2775 Error(Loc, "constant expression expected");
2776 return MatchOperand_ParseFail;
2778 int Val = CE->getValue();
2779 if (Val < Low || Val > High) {
2780 Error(Loc, "immediate value out of range");
2781 return MatchOperand_ParseFail;
2784 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
2786 return MatchOperand_Success;
2789 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2790 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2791 const AsmToken &Tok = Parser.getTok();
2792 SMLoc S = Tok.getLoc();
2793 if (Tok.isNot(AsmToken::Identifier)) {
2794 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2795 return MatchOperand_ParseFail;
2797 int Val = StringSwitch<int>(Tok.getString())
2801 Parser.Lex(); // Eat the token.
2804 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2805 return MatchOperand_ParseFail;
2807 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
2809 S, Parser.getTok().getLoc()));
2810 return MatchOperand_Success;
2813 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
2814 /// instructions. Legal values are:
2815 /// lsl #n 'n' in [0,31]
2816 /// asr #n 'n' in [1,32]
2817 /// n == 32 encoded as n == 0.
2818 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2819 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2820 const AsmToken &Tok = Parser.getTok();
2821 SMLoc S = Tok.getLoc();
2822 if (Tok.isNot(AsmToken::Identifier)) {
2823 Error(S, "shift operator 'asr' or 'lsl' expected");
2824 return MatchOperand_ParseFail;
2826 StringRef ShiftName = Tok.getString();
2828 if (ShiftName == "lsl" || ShiftName == "LSL")
2830 else if (ShiftName == "asr" || ShiftName == "ASR")
2833 Error(S, "shift operator 'asr' or 'lsl' expected");
2834 return MatchOperand_ParseFail;
2836 Parser.Lex(); // Eat the operator.
2838 // A '#' and a shift amount.
2839 if (Parser.getTok().isNot(AsmToken::Hash)) {
2840 Error(Parser.getTok().getLoc(), "'#' expected");
2841 return MatchOperand_ParseFail;
2843 Parser.Lex(); // Eat hash token.
2845 const MCExpr *ShiftAmount;
2846 SMLoc E = Parser.getTok().getLoc();
2847 if (getParser().ParseExpression(ShiftAmount)) {
2848 Error(E, "malformed shift expression");
2849 return MatchOperand_ParseFail;
2851 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2853 Error(E, "shift amount must be an immediate");
2854 return MatchOperand_ParseFail;
2857 int64_t Val = CE->getValue();
2859 // Shift amount must be in [1,32]
2860 if (Val < 1 || Val > 32) {
2861 Error(E, "'asr' shift amount must be in range [1,32]");
2862 return MatchOperand_ParseFail;
2864 // asr #32 encoded as asr #0, but is not allowed in Thumb2 mode.
2865 if (isThumb() && Val == 32) {
2866 Error(E, "'asr #32' shift amount not allowed in Thumb mode");
2867 return MatchOperand_ParseFail;
2869 if (Val == 32) Val = 0;
2871 // Shift amount must be in [1,32]
2872 if (Val < 0 || Val > 31) {
2873 Error(E, "'lsr' shift amount must be in range [0,31]");
2874 return MatchOperand_ParseFail;
2878 E = Parser.getTok().getLoc();
2879 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2881 return MatchOperand_Success;
2884 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2885 /// of instructions. Legal values are:
2886 /// ror #n 'n' in {0, 8, 16, 24}
2887 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2888 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2889 const AsmToken &Tok = Parser.getTok();
2890 SMLoc S = Tok.getLoc();
2891 if (Tok.isNot(AsmToken::Identifier))
2892 return MatchOperand_NoMatch;
2893 StringRef ShiftName = Tok.getString();
2894 if (ShiftName != "ror" && ShiftName != "ROR")
2895 return MatchOperand_NoMatch;
2896 Parser.Lex(); // Eat the operator.
2898 // A '#' and a rotate amount.
2899 if (Parser.getTok().isNot(AsmToken::Hash)) {
2900 Error(Parser.getTok().getLoc(), "'#' expected");
2901 return MatchOperand_ParseFail;
2903 Parser.Lex(); // Eat hash token.
2905 const MCExpr *ShiftAmount;
2906 SMLoc E = Parser.getTok().getLoc();
2907 if (getParser().ParseExpression(ShiftAmount)) {
2908 Error(E, "malformed rotate expression");
2909 return MatchOperand_ParseFail;
2911 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2913 Error(E, "rotate amount must be an immediate");
2914 return MatchOperand_ParseFail;
2917 int64_t Val = CE->getValue();
2918 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2919 // normally, zero is represented in asm by omitting the rotate operand
2921 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2922 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2923 return MatchOperand_ParseFail;
2926 E = Parser.getTok().getLoc();
2927 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2929 return MatchOperand_Success;
2932 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2933 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2934 SMLoc S = Parser.getTok().getLoc();
2935 // The bitfield descriptor is really two operands, the LSB and the width.
2936 if (Parser.getTok().isNot(AsmToken::Hash)) {
2937 Error(Parser.getTok().getLoc(), "'#' expected");
2938 return MatchOperand_ParseFail;
2940 Parser.Lex(); // Eat hash token.
2942 const MCExpr *LSBExpr;
2943 SMLoc E = Parser.getTok().getLoc();
2944 if (getParser().ParseExpression(LSBExpr)) {
2945 Error(E, "malformed immediate expression");
2946 return MatchOperand_ParseFail;
2948 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2950 Error(E, "'lsb' operand must be an immediate");
2951 return MatchOperand_ParseFail;
2954 int64_t LSB = CE->getValue();
2955 // The LSB must be in the range [0,31]
2956 if (LSB < 0 || LSB > 31) {
2957 Error(E, "'lsb' operand must be in the range [0,31]");
2958 return MatchOperand_ParseFail;
2960 E = Parser.getTok().getLoc();
2962 // Expect another immediate operand.
2963 if (Parser.getTok().isNot(AsmToken::Comma)) {
2964 Error(Parser.getTok().getLoc(), "too few operands");
2965 return MatchOperand_ParseFail;
2967 Parser.Lex(); // Eat hash token.
2968 if (Parser.getTok().isNot(AsmToken::Hash)) {
2969 Error(Parser.getTok().getLoc(), "'#' expected");
2970 return MatchOperand_ParseFail;
2972 Parser.Lex(); // Eat hash token.
2974 const MCExpr *WidthExpr;
2975 if (getParser().ParseExpression(WidthExpr)) {
2976 Error(E, "malformed immediate expression");
2977 return MatchOperand_ParseFail;
2979 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2981 Error(E, "'width' operand must be an immediate");
2982 return MatchOperand_ParseFail;
2985 int64_t Width = CE->getValue();
2986 // The LSB must be in the range [1,32-lsb]
2987 if (Width < 1 || Width > 32 - LSB) {
2988 Error(E, "'width' operand must be in the range [1,32-lsb]");
2989 return MatchOperand_ParseFail;
2991 E = Parser.getTok().getLoc();
2993 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2995 return MatchOperand_Success;
2998 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2999 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3000 // Check for a post-index addressing register operand. Specifically:
3001 // postidx_reg := '+' register {, shift}
3002 // | '-' register {, shift}
3003 // | register {, shift}
3005 // This method must return MatchOperand_NoMatch without consuming any tokens
3006 // in the case where there is no match, as other alternatives take other
3008 AsmToken Tok = Parser.getTok();
3009 SMLoc S = Tok.getLoc();
3010 bool haveEaten = false;
3013 if (Tok.is(AsmToken::Plus)) {
3014 Parser.Lex(); // Eat the '+' token.
3016 } else if (Tok.is(AsmToken::Minus)) {
3017 Parser.Lex(); // Eat the '-' token.
3021 if (Parser.getTok().is(AsmToken::Identifier))
3022 Reg = tryParseRegister();
3025 return MatchOperand_NoMatch;
3026 Error(Parser.getTok().getLoc(), "register expected");
3027 return MatchOperand_ParseFail;
3029 SMLoc E = Parser.getTok().getLoc();
3031 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
3032 unsigned ShiftImm = 0;
3033 if (Parser.getTok().is(AsmToken::Comma)) {
3034 Parser.Lex(); // Eat the ','.
3035 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
3036 return MatchOperand_ParseFail;
3039 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
3042 return MatchOperand_Success;
3045 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
3046 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3047 // Check for a post-index addressing register operand. Specifically:
3048 // am3offset := '+' register
3055 // This method must return MatchOperand_NoMatch without consuming any tokens
3056 // in the case where there is no match, as other alternatives take other
3058 AsmToken Tok = Parser.getTok();
3059 SMLoc S = Tok.getLoc();
3061 // Do immediates first, as we always parse those if we have a '#'.
3062 if (Parser.getTok().is(AsmToken::Hash)) {
3063 Parser.Lex(); // Eat the '#'.
3064 // Explicitly look for a '-', as we need to encode negative zero
3066 bool isNegative = Parser.getTok().is(AsmToken::Minus);
3067 const MCExpr *Offset;
3068 if (getParser().ParseExpression(Offset))
3069 return MatchOperand_ParseFail;
3070 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
3072 Error(S, "constant expression expected");
3073 return MatchOperand_ParseFail;
3075 SMLoc E = Tok.getLoc();
3076 // Negative zero is encoded as the flag value INT32_MIN.
3077 int32_t Val = CE->getValue();
3078 if (isNegative && Val == 0)
3082 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
3084 return MatchOperand_Success;
3088 bool haveEaten = false;
3091 if (Tok.is(AsmToken::Plus)) {
3092 Parser.Lex(); // Eat the '+' token.
3094 } else if (Tok.is(AsmToken::Minus)) {
3095 Parser.Lex(); // Eat the '-' token.
3099 if (Parser.getTok().is(AsmToken::Identifier))
3100 Reg = tryParseRegister();
3103 return MatchOperand_NoMatch;
3104 Error(Parser.getTok().getLoc(), "register expected");
3105 return MatchOperand_ParseFail;
3107 SMLoc E = Parser.getTok().getLoc();
3109 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
3112 return MatchOperand_Success;
3115 /// cvtT2LdrdPre - Convert parsed operands to MCInst.
3116 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3117 /// when they refer multiple MIOperands inside a single one.
3119 cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
3120 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3122 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3123 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3124 // Create a writeback register dummy placeholder.
3125 Inst.addOperand(MCOperand::CreateReg(0));
3127 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
3129 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3133 /// cvtT2StrdPre - Convert parsed operands to MCInst.
3134 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3135 /// when they refer multiple MIOperands inside a single one.
3137 cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
3138 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3139 // Create a writeback register dummy placeholder.
3140 Inst.addOperand(MCOperand::CreateReg(0));
3142 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3143 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3145 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
3147 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3151 /// cvtLdWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
3152 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3153 /// when they refer multiple MIOperands inside a single one.
3155 cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
3156 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3157 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3159 // Create a writeback register dummy placeholder.
3160 Inst.addOperand(MCOperand::CreateImm(0));
3162 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
3163 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3167 /// cvtStWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
3168 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3169 /// when they refer multiple MIOperands inside a single one.
3171 cvtStWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
3172 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3173 // Create a writeback register dummy placeholder.
3174 Inst.addOperand(MCOperand::CreateImm(0));
3175 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3176 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
3177 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3181 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
3182 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3183 /// when they refer multiple MIOperands inside a single one.
3185 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
3186 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3187 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3189 // Create a writeback register dummy placeholder.
3190 Inst.addOperand(MCOperand::CreateImm(0));
3192 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
3193 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3197 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
3198 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3199 /// when they refer multiple MIOperands inside a single one.
3201 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
3202 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3203 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3205 // Create a writeback register dummy placeholder.
3206 Inst.addOperand(MCOperand::CreateImm(0));
3208 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
3209 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3214 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
3215 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3216 /// when they refer multiple MIOperands inside a single one.
3218 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
3219 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3220 // Create a writeback register dummy placeholder.
3221 Inst.addOperand(MCOperand::CreateImm(0));
3222 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3223 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
3224 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3228 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
3229 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3230 /// when they refer multiple MIOperands inside a single one.
3232 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
3233 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3234 // Create a writeback register dummy placeholder.
3235 Inst.addOperand(MCOperand::CreateImm(0));
3236 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3237 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
3238 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3242 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
3243 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3244 /// when they refer multiple MIOperands inside a single one.
3246 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
3247 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3248 // Create a writeback register dummy placeholder.
3249 Inst.addOperand(MCOperand::CreateImm(0));
3250 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3251 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
3252 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3256 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
3257 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3258 /// when they refer multiple MIOperands inside a single one.
3260 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
3261 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3263 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3264 // Create a writeback register dummy placeholder.
3265 Inst.addOperand(MCOperand::CreateImm(0));
3267 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3269 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
3271 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3275 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
3276 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3277 /// when they refer multiple MIOperands inside a single one.
3279 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
3280 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3282 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3283 // Create a writeback register dummy placeholder.
3284 Inst.addOperand(MCOperand::CreateImm(0));
3286 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3288 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
3290 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3294 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
3295 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3296 /// when they refer multiple MIOperands inside a single one.
3298 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
3299 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3300 // Create a writeback register dummy placeholder.
3301 Inst.addOperand(MCOperand::CreateImm(0));
3303 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3305 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3307 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
3309 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3313 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
3314 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3315 /// when they refer multiple MIOperands inside a single one.
3317 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
3318 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3319 // Create a writeback register dummy placeholder.
3320 Inst.addOperand(MCOperand::CreateImm(0));
3322 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3324 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3326 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
3328 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3332 /// cvtLdrdPre - Convert parsed operands to MCInst.
3333 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3334 /// when they refer multiple MIOperands inside a single one.
3336 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
3337 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3339 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3340 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3341 // Create a writeback register dummy placeholder.
3342 Inst.addOperand(MCOperand::CreateImm(0));
3344 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3346 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3350 /// cvtStrdPre - Convert parsed operands to MCInst.
3351 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3352 /// when they refer multiple MIOperands inside a single one.
3354 cvtStrdPre(MCInst &Inst, unsigned Opcode,
3355 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3356 // Create a writeback register dummy placeholder.
3357 Inst.addOperand(MCOperand::CreateImm(0));
3359 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3360 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3362 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3364 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3368 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
3369 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3370 /// when they refer multiple MIOperands inside a single one.
3372 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
3373 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3374 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3375 // Create a writeback register dummy placeholder.
3376 Inst.addOperand(MCOperand::CreateImm(0));
3377 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
3378 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3382 /// cvtThumbMultiple- Convert parsed operands to MCInst.
3383 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3384 /// when they refer multiple MIOperands inside a single one.
3386 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
3387 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3388 // The second source operand must be the same register as the destination
3390 if (Operands.size() == 6 &&
3391 (((ARMOperand*)Operands[3])->getReg() !=
3392 ((ARMOperand*)Operands[5])->getReg()) &&
3393 (((ARMOperand*)Operands[3])->getReg() !=
3394 ((ARMOperand*)Operands[4])->getReg())) {
3395 Error(Operands[3]->getStartLoc(),
3396 "destination register must match source register");
3399 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3400 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
3401 // If we have a three-operand form, make sure to set Rn to be the operand
3402 // that isn't the same as Rd.
3404 if (Operands.size() == 6 &&
3405 ((ARMOperand*)Operands[4])->getReg() ==
3406 ((ARMOperand*)Operands[3])->getReg())
3408 ((ARMOperand*)Operands[RegOp])->addRegOperands(Inst, 1);
3409 Inst.addOperand(Inst.getOperand(0));
3410 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
3416 cvtVLDwbFixed(MCInst &Inst, unsigned Opcode,
3417 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3419 ((ARMOperand*)Operands[3])->addVecListOperands(Inst, 1);
3420 // Create a writeback register dummy placeholder.
3421 Inst.addOperand(MCOperand::CreateImm(0));
3423 ((ARMOperand*)Operands[4])->addAlignedMemoryOperands(Inst, 2);
3425 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3430 cvtVLDwbRegister(MCInst &Inst, unsigned Opcode,
3431 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3433 ((ARMOperand*)Operands[3])->addVecListOperands(Inst, 1);
3434 // Create a writeback register dummy placeholder.
3435 Inst.addOperand(MCOperand::CreateImm(0));
3437 ((ARMOperand*)Operands[4])->addAlignedMemoryOperands(Inst, 2);
3439 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
3441 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3446 cvtVSTwbFixed(MCInst &Inst, unsigned Opcode,
3447 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3448 // Create a writeback register dummy placeholder.
3449 Inst.addOperand(MCOperand::CreateImm(0));
3451 ((ARMOperand*)Operands[4])->addAlignedMemoryOperands(Inst, 2);
3453 ((ARMOperand*)Operands[3])->addVecListOperands(Inst, 1);
3455 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3460 cvtVSTwbRegister(MCInst &Inst, unsigned Opcode,
3461 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3462 // Create a writeback register dummy placeholder.
3463 Inst.addOperand(MCOperand::CreateImm(0));
3465 ((ARMOperand*)Operands[4])->addAlignedMemoryOperands(Inst, 2);
3467 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
3469 ((ARMOperand*)Operands[3])->addVecListOperands(Inst, 1);
3471 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3475 /// Parse an ARM memory expression, return false if successful else return true
3476 /// or an error. The first token must be a '[' when called.
3478 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3480 assert(Parser.getTok().is(AsmToken::LBrac) &&
3481 "Token is not a Left Bracket");
3482 S = Parser.getTok().getLoc();
3483 Parser.Lex(); // Eat left bracket token.
3485 const AsmToken &BaseRegTok = Parser.getTok();
3486 int BaseRegNum = tryParseRegister();
3487 if (BaseRegNum == -1)
3488 return Error(BaseRegTok.getLoc(), "register expected");
3490 // The next token must either be a comma or a closing bracket.
3491 const AsmToken &Tok = Parser.getTok();
3492 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
3493 return Error(Tok.getLoc(), "malformed memory operand");
3495 if (Tok.is(AsmToken::RBrac)) {
3497 Parser.Lex(); // Eat right bracket token.
3499 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
3500 0, 0, false, S, E));
3502 // If there's a pre-indexing writeback marker, '!', just add it as a token
3503 // operand. It's rather odd, but syntactically valid.
3504 if (Parser.getTok().is(AsmToken::Exclaim)) {
3505 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3506 Parser.Lex(); // Eat the '!'.
3512 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
3513 Parser.Lex(); // Eat the comma.
3515 // If we have a ':', it's an alignment specifier.
3516 if (Parser.getTok().is(AsmToken::Colon)) {
3517 Parser.Lex(); // Eat the ':'.
3518 E = Parser.getTok().getLoc();
3521 if (getParser().ParseExpression(Expr))
3524 // The expression has to be a constant. Memory references with relocations
3525 // don't come through here, as they use the <label> forms of the relevant
3527 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3529 return Error (E, "constant expression expected");
3532 switch (CE->getValue()) {
3534 return Error(E, "alignment specifier must be 64, 128, or 256 bits");
3535 case 64: Align = 8; break;
3536 case 128: Align = 16; break;
3537 case 256: Align = 32; break;
3540 // Now we should have the closing ']'
3541 E = Parser.getTok().getLoc();
3542 if (Parser.getTok().isNot(AsmToken::RBrac))
3543 return Error(E, "']' expected");
3544 Parser.Lex(); // Eat right bracket token.
3546 // Don't worry about range checking the value here. That's handled by
3547 // the is*() predicates.
3548 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0,
3549 ARM_AM::no_shift, 0, Align,
3552 // If there's a pre-indexing writeback marker, '!', just add it as a token
3554 if (Parser.getTok().is(AsmToken::Exclaim)) {
3555 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3556 Parser.Lex(); // Eat the '!'.
3562 // If we have a '#', it's an immediate offset, else assume it's a register
3563 // offset. Be friendly and also accept a plain integer (without a leading
3564 // hash) for gas compatibility.
3565 if (Parser.getTok().is(AsmToken::Hash) ||
3566 Parser.getTok().is(AsmToken::Integer)) {
3567 if (Parser.getTok().is(AsmToken::Hash))
3568 Parser.Lex(); // Eat the '#'.
3569 E = Parser.getTok().getLoc();
3571 bool isNegative = getParser().getTok().is(AsmToken::Minus);
3572 const MCExpr *Offset;
3573 if (getParser().ParseExpression(Offset))
3576 // The expression has to be a constant. Memory references with relocations
3577 // don't come through here, as they use the <label> forms of the relevant
3579 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
3581 return Error (E, "constant expression expected");
3583 // If the constant was #-0, represent it as INT32_MIN.
3584 int32_t Val = CE->getValue();
3585 if (isNegative && Val == 0)
3586 CE = MCConstantExpr::Create(INT32_MIN, getContext());
3588 // Now we should have the closing ']'
3589 E = Parser.getTok().getLoc();
3590 if (Parser.getTok().isNot(AsmToken::RBrac))
3591 return Error(E, "']' expected");
3592 Parser.Lex(); // Eat right bracket token.
3594 // Don't worry about range checking the value here. That's handled by
3595 // the is*() predicates.
3596 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
3597 ARM_AM::no_shift, 0, 0,
3600 // If there's a pre-indexing writeback marker, '!', just add it as a token
3602 if (Parser.getTok().is(AsmToken::Exclaim)) {
3603 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3604 Parser.Lex(); // Eat the '!'.
3610 // The register offset is optionally preceded by a '+' or '-'
3611 bool isNegative = false;
3612 if (Parser.getTok().is(AsmToken::Minus)) {
3614 Parser.Lex(); // Eat the '-'.
3615 } else if (Parser.getTok().is(AsmToken::Plus)) {
3617 Parser.Lex(); // Eat the '+'.
3620 E = Parser.getTok().getLoc();
3621 int OffsetRegNum = tryParseRegister();
3622 if (OffsetRegNum == -1)
3623 return Error(E, "register expected");
3625 // If there's a shift operator, handle it.
3626 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
3627 unsigned ShiftImm = 0;
3628 if (Parser.getTok().is(AsmToken::Comma)) {
3629 Parser.Lex(); // Eat the ','.
3630 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
3634 // Now we should have the closing ']'
3635 E = Parser.getTok().getLoc();
3636 if (Parser.getTok().isNot(AsmToken::RBrac))
3637 return Error(E, "']' expected");
3638 Parser.Lex(); // Eat right bracket token.
3640 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
3641 ShiftType, ShiftImm, 0, isNegative,
3644 // If there's a pre-indexing writeback marker, '!', just add it as a token
3646 if (Parser.getTok().is(AsmToken::Exclaim)) {
3647 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3648 Parser.Lex(); // Eat the '!'.
3654 /// parseMemRegOffsetShift - one of these two:
3655 /// ( lsl | lsr | asr | ror ) , # shift_amount
3657 /// return true if it parses a shift otherwise it returns false.
3658 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
3660 SMLoc Loc = Parser.getTok().getLoc();
3661 const AsmToken &Tok = Parser.getTok();
3662 if (Tok.isNot(AsmToken::Identifier))
3664 StringRef ShiftName = Tok.getString();
3665 if (ShiftName == "lsl" || ShiftName == "LSL")
3667 else if (ShiftName == "lsr" || ShiftName == "LSR")
3669 else if (ShiftName == "asr" || ShiftName == "ASR")
3671 else if (ShiftName == "ror" || ShiftName == "ROR")
3673 else if (ShiftName == "rrx" || ShiftName == "RRX")
3676 return Error(Loc, "illegal shift operator");
3677 Parser.Lex(); // Eat shift type token.
3679 // rrx stands alone.
3681 if (St != ARM_AM::rrx) {
3682 Loc = Parser.getTok().getLoc();
3683 // A '#' and a shift amount.
3684 const AsmToken &HashTok = Parser.getTok();
3685 if (HashTok.isNot(AsmToken::Hash))
3686 return Error(HashTok.getLoc(), "'#' expected");
3687 Parser.Lex(); // Eat hash token.
3690 if (getParser().ParseExpression(Expr))
3692 // Range check the immediate.
3693 // lsl, ror: 0 <= imm <= 31
3694 // lsr, asr: 0 <= imm <= 32
3695 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3697 return Error(Loc, "shift amount must be an immediate");
3698 int64_t Imm = CE->getValue();
3700 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
3701 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
3702 return Error(Loc, "immediate shift value out of range");
3709 /// parseFPImm - A floating point immediate expression operand.
3710 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
3711 parseFPImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3712 SMLoc S = Parser.getTok().getLoc();
3714 if (Parser.getTok().isNot(AsmToken::Hash))
3715 return MatchOperand_NoMatch;
3717 // Disambiguate the VMOV forms that can accept an FP immediate.
3718 // vmov.f32 <sreg>, #imm
3719 // vmov.f64 <dreg>, #imm
3720 // vmov.f32 <dreg>, #imm @ vector f32x2
3721 // vmov.f32 <qreg>, #imm @ vector f32x4
3723 // There are also the NEON VMOV instructions which expect an
3724 // integer constant. Make sure we don't try to parse an FPImm
3726 // vmov.i{8|16|32|64} <dreg|qreg>, #imm
3727 ARMOperand *TyOp = static_cast<ARMOperand*>(Operands[2]);
3728 if (!TyOp->isToken() || (TyOp->getToken() != ".f32" &&
3729 TyOp->getToken() != ".f64"))
3730 return MatchOperand_NoMatch;
3732 Parser.Lex(); // Eat the '#'.
3734 // Handle negation, as that still comes through as a separate token.
3735 bool isNegative = false;
3736 if (Parser.getTok().is(AsmToken::Minus)) {
3740 const AsmToken &Tok = Parser.getTok();
3741 if (Tok.is(AsmToken::Real)) {
3742 APFloat RealVal(APFloat::IEEEdouble, Tok.getString());
3743 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
3744 // If we had a '-' in front, toggle the sign bit.
3745 IntVal ^= (uint64_t)isNegative << 63;
3746 int Val = ARM_AM::getFP64Imm(APInt(64, IntVal));
3747 Parser.Lex(); // Eat the token.
3749 TokError("floating point value out of range");
3750 return MatchOperand_ParseFail;
3752 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3753 return MatchOperand_Success;
3755 if (Tok.is(AsmToken::Integer)) {
3756 int64_t Val = Tok.getIntVal();
3757 Parser.Lex(); // Eat the token.
3758 if (Val > 255 || Val < 0) {
3759 TokError("encoded floating point value out of range");
3760 return MatchOperand_ParseFail;
3762 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3763 return MatchOperand_Success;
3766 TokError("invalid floating point immediate");
3767 return MatchOperand_ParseFail;
3769 /// Parse a arm instruction operand. For now this parses the operand regardless
3770 /// of the mnemonic.
3771 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3772 StringRef Mnemonic) {
3775 // Check if the current operand has a custom associated parser, if so, try to
3776 // custom parse the operand, or fallback to the general approach.
3777 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
3778 if (ResTy == MatchOperand_Success)
3780 // If there wasn't a custom match, try the generic matcher below. Otherwise,
3781 // there was a match, but an error occurred, in which case, just return that
3782 // the operand parsing failed.
3783 if (ResTy == MatchOperand_ParseFail)
3786 switch (getLexer().getKind()) {
3788 Error(Parser.getTok().getLoc(), "unexpected token in operand");
3790 case AsmToken::Identifier: {
3791 // If this is VMRS, check for the apsr_nzcv operand.
3792 if (!tryParseRegisterWithWriteBack(Operands))
3794 int Res = tryParseShiftRegister(Operands);
3795 if (Res == 0) // success
3797 else if (Res == -1) // irrecoverable error
3799 if (Mnemonic == "vmrs" && Parser.getTok().getString() == "apsr_nzcv") {
3800 S = Parser.getTok().getLoc();
3802 Operands.push_back(ARMOperand::CreateToken("apsr_nzcv", S));
3806 // Fall though for the Identifier case that is not a register or a
3809 case AsmToken::LParen: // parenthesized expressions like (_strcmp-4)
3810 case AsmToken::Integer: // things like 1f and 2b as a branch targets
3811 case AsmToken::String: // quoted label names.
3812 case AsmToken::Dot: { // . as a branch target
3813 // This was not a register so parse other operands that start with an
3814 // identifier (like labels) as expressions and create them as immediates.
3815 const MCExpr *IdVal;
3816 S = Parser.getTok().getLoc();
3817 if (getParser().ParseExpression(IdVal))
3819 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3820 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
3823 case AsmToken::LBrac:
3824 return parseMemory(Operands);
3825 case AsmToken::LCurly:
3826 return parseRegisterList(Operands);
3827 case AsmToken::Hash: {
3828 // #42 -> immediate.
3829 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
3830 S = Parser.getTok().getLoc();
3832 bool isNegative = Parser.getTok().is(AsmToken::Minus);
3833 const MCExpr *ImmVal;
3834 if (getParser().ParseExpression(ImmVal))
3836 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ImmVal);
3838 int32_t Val = CE->getValue();
3839 if (isNegative && Val == 0)
3840 ImmVal = MCConstantExpr::Create(INT32_MIN, getContext());
3842 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3843 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
3846 case AsmToken::Colon: {
3847 // ":lower16:" and ":upper16:" expression prefixes
3848 // FIXME: Check it's an expression prefix,
3849 // e.g. (FOO - :lower16:BAR) isn't legal.
3850 ARMMCExpr::VariantKind RefKind;
3851 if (parsePrefix(RefKind))
3854 const MCExpr *SubExprVal;
3855 if (getParser().ParseExpression(SubExprVal))
3858 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
3860 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3861 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
3867 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
3868 // :lower16: and :upper16:.
3869 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
3870 RefKind = ARMMCExpr::VK_ARM_None;
3872 // :lower16: and :upper16: modifiers
3873 assert(getLexer().is(AsmToken::Colon) && "expected a :");
3874 Parser.Lex(); // Eat ':'
3876 if (getLexer().isNot(AsmToken::Identifier)) {
3877 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
3881 StringRef IDVal = Parser.getTok().getIdentifier();
3882 if (IDVal == "lower16") {
3883 RefKind = ARMMCExpr::VK_ARM_LO16;
3884 } else if (IDVal == "upper16") {
3885 RefKind = ARMMCExpr::VK_ARM_HI16;
3887 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
3892 if (getLexer().isNot(AsmToken::Colon)) {
3893 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
3896 Parser.Lex(); // Eat the last ':'
3900 /// \brief Given a mnemonic, split out possible predication code and carry
3901 /// setting letters to form a canonical mnemonic and flags.
3903 // FIXME: Would be nice to autogen this.
3904 // FIXME: This is a bit of a maze of special cases.
3905 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
3906 unsigned &PredicationCode,
3908 unsigned &ProcessorIMod,
3909 StringRef &ITMask) {
3910 PredicationCode = ARMCC::AL;
3911 CarrySetting = false;
3914 // Ignore some mnemonics we know aren't predicated forms.
3916 // FIXME: Would be nice to autogen this.
3917 if ((Mnemonic == "movs" && isThumb()) ||
3918 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
3919 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
3920 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
3921 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
3922 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
3923 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
3924 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
3927 // First, split out any predication code. Ignore mnemonics we know aren't
3928 // predicated but do have a carry-set and so weren't caught above.
3929 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
3930 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
3931 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
3932 Mnemonic != "sbcs" && Mnemonic != "rscs") {
3933 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
3934 .Case("eq", ARMCC::EQ)
3935 .Case("ne", ARMCC::NE)
3936 .Case("hs", ARMCC::HS)
3937 .Case("cs", ARMCC::HS)
3938 .Case("lo", ARMCC::LO)
3939 .Case("cc", ARMCC::LO)
3940 .Case("mi", ARMCC::MI)
3941 .Case("pl", ARMCC::PL)
3942 .Case("vs", ARMCC::VS)
3943 .Case("vc", ARMCC::VC)
3944 .Case("hi", ARMCC::HI)
3945 .Case("ls", ARMCC::LS)
3946 .Case("ge", ARMCC::GE)
3947 .Case("lt", ARMCC::LT)
3948 .Case("gt", ARMCC::GT)
3949 .Case("le", ARMCC::LE)
3950 .Case("al", ARMCC::AL)
3953 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
3954 PredicationCode = CC;
3958 // Next, determine if we have a carry setting bit. We explicitly ignore all
3959 // the instructions we know end in 's'.
3960 if (Mnemonic.endswith("s") &&
3961 !(Mnemonic == "cps" || Mnemonic == "mls" ||
3962 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
3963 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
3964 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
3965 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
3966 (Mnemonic == "movs" && isThumb()))) {
3967 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
3968 CarrySetting = true;
3971 // The "cps" instruction can have a interrupt mode operand which is glued into
3972 // the mnemonic. Check if this is the case, split it and parse the imod op
3973 if (Mnemonic.startswith("cps")) {
3974 // Split out any imod code.
3976 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
3977 .Case("ie", ARM_PROC::IE)
3978 .Case("id", ARM_PROC::ID)
3981 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
3982 ProcessorIMod = IMod;
3986 // The "it" instruction has the condition mask on the end of the mnemonic.
3987 if (Mnemonic.startswith("it")) {
3988 ITMask = Mnemonic.slice(2, Mnemonic.size());
3989 Mnemonic = Mnemonic.slice(0, 2);
3995 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
3996 /// inclusion of carry set or predication code operands.
3998 // FIXME: It would be nice to autogen this.
4000 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
4001 bool &CanAcceptPredicationCode) {
4002 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
4003 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
4004 Mnemonic == "add" || Mnemonic == "adc" ||
4005 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
4006 Mnemonic == "orr" || Mnemonic == "mvn" ||
4007 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
4008 Mnemonic == "sbc" || Mnemonic == "eor" || Mnemonic == "neg" ||
4009 (!isThumb() && (Mnemonic == "smull" || Mnemonic == "mov" ||
4010 Mnemonic == "mla" || Mnemonic == "smlal" ||
4011 Mnemonic == "umlal" || Mnemonic == "umull"))) {
4012 CanAcceptCarrySet = true;
4014 CanAcceptCarrySet = false;
4016 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
4017 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
4018 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
4019 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
4020 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "setend" ||
4021 (Mnemonic == "clrex" && !isThumb()) ||
4022 (Mnemonic == "nop" && isThumbOne()) ||
4023 ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw" ||
4024 Mnemonic == "ldc2" || Mnemonic == "ldc2l" ||
4025 Mnemonic == "stc2" || Mnemonic == "stc2l") && !isThumb()) ||
4026 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs")) &&
4028 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumbOne())) {
4029 CanAcceptPredicationCode = false;
4031 CanAcceptPredicationCode = true;
4034 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
4035 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
4036 CanAcceptPredicationCode = false;
4040 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
4041 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4042 // FIXME: This is all horribly hacky. We really need a better way to deal
4043 // with optional operands like this in the matcher table.
4045 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
4046 // another does not. Specifically, the MOVW instruction does not. So we
4047 // special case it here and remove the defaulted (non-setting) cc_out
4048 // operand if that's the instruction we're trying to match.
4050 // We do this as post-processing of the explicit operands rather than just
4051 // conditionally adding the cc_out in the first place because we need
4052 // to check the type of the parsed immediate operand.
4053 if (Mnemonic == "mov" && Operands.size() > 4 && !isThumb() &&
4054 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
4055 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
4056 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
4059 // Register-register 'add' for thumb does not have a cc_out operand
4060 // when there are only two register operands.
4061 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
4062 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4063 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4064 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
4066 // Register-register 'add' for thumb does not have a cc_out operand
4067 // when it's an ADD Rdm, SP, {Rdm|#imm0_255} instruction. We do
4068 // have to check the immediate range here since Thumb2 has a variant
4069 // that can handle a different range and has a cc_out operand.
4070 if (((isThumb() && Mnemonic == "add") ||
4071 (isThumbTwo() && Mnemonic == "sub")) &&
4072 Operands.size() == 6 &&
4073 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4074 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4075 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
4076 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
4077 (static_cast<ARMOperand*>(Operands[5])->isReg() ||
4078 static_cast<ARMOperand*>(Operands[5])->isImm0_1020s4()))
4080 // For Thumb2, add/sub immediate does not have a cc_out operand for the
4081 // imm0_4095 variant. That's the least-preferred variant when
4082 // selecting via the generic "add" mnemonic, so to know that we
4083 // should remove the cc_out operand, we have to explicitly check that
4084 // it's not one of the other variants. Ugh.
4085 if (isThumbTwo() && (Mnemonic == "add" || Mnemonic == "sub") &&
4086 Operands.size() == 6 &&
4087 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4088 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4089 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4090 // Nest conditions rather than one big 'if' statement for readability.
4092 // If either register is a high reg, it's either one of the SP
4093 // variants (handled above) or a 32-bit encoding, so we just
4094 // check against T3.
4095 if ((!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
4096 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg())) &&
4097 static_cast<ARMOperand*>(Operands[5])->isT2SOImm())
4099 // If both registers are low, we're in an IT block, and the immediate is
4100 // in range, we should use encoding T1 instead, which has a cc_out.
4102 isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) &&
4103 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
4104 static_cast<ARMOperand*>(Operands[5])->isImm0_7())
4107 // Otherwise, we use encoding T4, which does not have a cc_out
4112 // The thumb2 multiply instruction doesn't have a CCOut register, so
4113 // if we have a "mul" mnemonic in Thumb mode, check if we'll be able to
4114 // use the 16-bit encoding or not.
4115 if (isThumbTwo() && Mnemonic == "mul" && Operands.size() == 6 &&
4116 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
4117 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4118 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4119 static_cast<ARMOperand*>(Operands[5])->isReg() &&
4120 // If the registers aren't low regs, the destination reg isn't the
4121 // same as one of the source regs, or the cc_out operand is zero
4122 // outside of an IT block, we have to use the 32-bit encoding, so
4123 // remove the cc_out operand.
4124 (!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
4125 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) ||
4126 !isARMLowRegister(static_cast<ARMOperand*>(Operands[5])->getReg()) ||
4128 (static_cast<ARMOperand*>(Operands[3])->getReg() !=
4129 static_cast<ARMOperand*>(Operands[5])->getReg() &&
4130 static_cast<ARMOperand*>(Operands[3])->getReg() !=
4131 static_cast<ARMOperand*>(Operands[4])->getReg())))
4134 // Also check the 'mul' syntax variant that doesn't specify an explicit
4135 // destination register.
4136 if (isThumbTwo() && Mnemonic == "mul" && Operands.size() == 5 &&
4137 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
4138 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4139 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4140 // If the registers aren't low regs or the cc_out operand is zero
4141 // outside of an IT block, we have to use the 32-bit encoding, so
4142 // remove the cc_out operand.
4143 (!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
4144 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) ||
4150 // Register-register 'add/sub' for thumb does not have a cc_out operand
4151 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
4152 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
4153 // right, this will result in better diagnostics (which operand is off)
4155 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
4156 (Operands.size() == 5 || Operands.size() == 6) &&
4157 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4158 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
4159 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
4165 static bool isDataTypeToken(StringRef Tok) {
4166 return Tok == ".8" || Tok == ".16" || Tok == ".32" || Tok == ".64" ||
4167 Tok == ".i8" || Tok == ".i16" || Tok == ".i32" || Tok == ".i64" ||
4168 Tok == ".u8" || Tok == ".u16" || Tok == ".u32" || Tok == ".u64" ||
4169 Tok == ".s8" || Tok == ".s16" || Tok == ".s32" || Tok == ".s64" ||
4170 Tok == ".p8" || Tok == ".p16" || Tok == ".f32" || Tok == ".f64" ||
4171 Tok == ".f" || Tok == ".d";
4174 // FIXME: This bit should probably be handled via an explicit match class
4175 // in the .td files that matches the suffix instead of having it be
4176 // a literal string token the way it is now.
4177 static bool doesIgnoreDataTypeSuffix(StringRef Mnemonic, StringRef DT) {
4178 return Mnemonic.startswith("vldm") || Mnemonic.startswith("vstm");
4181 /// Parse an arm instruction mnemonic followed by its operands.
4182 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
4183 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4184 // Create the leading tokens for the mnemonic, split by '.' characters.
4185 size_t Start = 0, Next = Name.find('.');
4186 StringRef Mnemonic = Name.slice(Start, Next);
4188 // Split out the predication code and carry setting flag from the mnemonic.
4189 unsigned PredicationCode;
4190 unsigned ProcessorIMod;
4193 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
4194 ProcessorIMod, ITMask);
4196 // In Thumb1, only the branch (B) instruction can be predicated.
4197 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
4198 Parser.EatToEndOfStatement();
4199 return Error(NameLoc, "conditional execution not supported in Thumb1");
4202 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
4204 // Handle the IT instruction ITMask. Convert it to a bitmask. This
4205 // is the mask as it will be for the IT encoding if the conditional
4206 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
4207 // where the conditional bit0 is zero, the instruction post-processing
4208 // will adjust the mask accordingly.
4209 if (Mnemonic == "it") {
4210 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + 2);
4211 if (ITMask.size() > 3) {
4212 Parser.EatToEndOfStatement();
4213 return Error(Loc, "too many conditions on IT instruction");
4216 for (unsigned i = ITMask.size(); i != 0; --i) {
4217 char pos = ITMask[i - 1];
4218 if (pos != 't' && pos != 'e') {
4219 Parser.EatToEndOfStatement();
4220 return Error(Loc, "illegal IT block condition mask '" + ITMask + "'");
4223 if (ITMask[i - 1] == 't')
4226 Operands.push_back(ARMOperand::CreateITMask(Mask, Loc));
4229 // FIXME: This is all a pretty gross hack. We should automatically handle
4230 // optional operands like this via tblgen.
4232 // Next, add the CCOut and ConditionCode operands, if needed.
4234 // For mnemonics which can ever incorporate a carry setting bit or predication
4235 // code, our matching model involves us always generating CCOut and
4236 // ConditionCode operands to match the mnemonic "as written" and then we let
4237 // the matcher deal with finding the right instruction or generating an
4238 // appropriate error.
4239 bool CanAcceptCarrySet, CanAcceptPredicationCode;
4240 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
4242 // If we had a carry-set on an instruction that can't do that, issue an
4244 if (!CanAcceptCarrySet && CarrySetting) {
4245 Parser.EatToEndOfStatement();
4246 return Error(NameLoc, "instruction '" + Mnemonic +
4247 "' can not set flags, but 's' suffix specified");
4249 // If we had a predication code on an instruction that can't do that, issue an
4251 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
4252 Parser.EatToEndOfStatement();
4253 return Error(NameLoc, "instruction '" + Mnemonic +
4254 "' is not predicable, but condition code specified");
4257 // Add the carry setting operand, if necessary.
4258 if (CanAcceptCarrySet) {
4259 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size());
4260 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
4264 // Add the predication code operand, if necessary.
4265 if (CanAcceptPredicationCode) {
4266 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size() +
4268 Operands.push_back(ARMOperand::CreateCondCode(
4269 ARMCC::CondCodes(PredicationCode), Loc));
4272 // Add the processor imod operand, if necessary.
4273 if (ProcessorIMod) {
4274 Operands.push_back(ARMOperand::CreateImm(
4275 MCConstantExpr::Create(ProcessorIMod, getContext()),
4279 // Add the remaining tokens in the mnemonic.
4280 while (Next != StringRef::npos) {
4282 Next = Name.find('.', Start + 1);
4283 StringRef ExtraToken = Name.slice(Start, Next);
4285 // Some NEON instructions have an optional datatype suffix that is
4286 // completely ignored. Check for that.
4287 if (isDataTypeToken(ExtraToken) &&
4288 doesIgnoreDataTypeSuffix(Mnemonic, ExtraToken))
4291 if (ExtraToken != ".n") {
4292 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Start);
4293 Operands.push_back(ARMOperand::CreateToken(ExtraToken, Loc));
4297 // Read the remaining operands.
4298 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4299 // Read the first operand.
4300 if (parseOperand(Operands, Mnemonic)) {
4301 Parser.EatToEndOfStatement();
4305 while (getLexer().is(AsmToken::Comma)) {
4306 Parser.Lex(); // Eat the comma.
4308 // Parse and remember the operand.
4309 if (parseOperand(Operands, Mnemonic)) {
4310 Parser.EatToEndOfStatement();
4316 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4317 SMLoc Loc = getLexer().getLoc();
4318 Parser.EatToEndOfStatement();
4319 return Error(Loc, "unexpected token in argument list");
4322 Parser.Lex(); // Consume the EndOfStatement
4324 // Some instructions, mostly Thumb, have forms for the same mnemonic that
4325 // do and don't have a cc_out optional-def operand. With some spot-checks
4326 // of the operand list, we can figure out which variant we're trying to
4327 // parse and adjust accordingly before actually matching. We shouldn't ever
4328 // try to remove a cc_out operand that was explicitly set on the the
4329 // mnemonic, of course (CarrySetting == true). Reason number #317 the
4330 // table driven matcher doesn't fit well with the ARM instruction set.
4331 if (!CarrySetting && shouldOmitCCOutOperand(Mnemonic, Operands)) {
4332 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
4333 Operands.erase(Operands.begin() + 1);
4337 // ARM mode 'blx' need special handling, as the register operand version
4338 // is predicable, but the label operand version is not. So, we can't rely
4339 // on the Mnemonic based checking to correctly figure out when to put
4340 // a k_CondCode operand in the list. If we're trying to match the label
4341 // version, remove the k_CondCode operand here.
4342 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
4343 static_cast<ARMOperand*>(Operands[2])->isImm()) {
4344 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
4345 Operands.erase(Operands.begin() + 1);
4349 // The vector-compare-to-zero instructions have a literal token "#0" at
4350 // the end that comes to here as an immediate operand. Convert it to a
4351 // token to play nicely with the matcher.
4352 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
4353 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
4354 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4355 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
4356 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4357 if (CE && CE->getValue() == 0) {
4358 Operands.erase(Operands.begin() + 5);
4359 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4363 // VCMP{E} does the same thing, but with a different operand count.
4364 if ((Mnemonic == "vcmp" || Mnemonic == "vcmpe") && Operands.size() == 5 &&
4365 static_cast<ARMOperand*>(Operands[4])->isImm()) {
4366 ARMOperand *Op = static_cast<ARMOperand*>(Operands[4]);
4367 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4368 if (CE && CE->getValue() == 0) {
4369 Operands.erase(Operands.begin() + 4);
4370 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4374 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
4375 // end. Convert it to a token here.
4376 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
4377 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4378 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
4379 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4380 if (CE && CE->getValue() == 0) {
4381 Operands.erase(Operands.begin() + 5);
4382 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4390 // Validate context-sensitive operand constraints.
4392 // return 'true' if register list contains non-low GPR registers,
4393 // 'false' otherwise. If Reg is in the register list or is HiReg, set
4394 // 'containsReg' to true.
4395 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
4396 unsigned HiReg, bool &containsReg) {
4397 containsReg = false;
4398 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4399 unsigned OpReg = Inst.getOperand(i).getReg();
4402 // Anything other than a low register isn't legal here.
4403 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
4409 // Check if the specified regisgter is in the register list of the inst,
4410 // starting at the indicated operand number.
4411 static bool listContainsReg(MCInst &Inst, unsigned OpNo, unsigned Reg) {
4412 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4413 unsigned OpReg = Inst.getOperand(i).getReg();
4420 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
4421 // the ARMInsts array) instead. Getting that here requires awkward
4422 // API changes, though. Better way?
4424 extern const MCInstrDesc ARMInsts[];
4426 static const MCInstrDesc &getInstDesc(unsigned Opcode) {
4427 return ARMInsts[Opcode];
4430 // FIXME: We would really like to be able to tablegen'erate this.
4432 validateInstruction(MCInst &Inst,
4433 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4434 const MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
4435 SMLoc Loc = Operands[0]->getStartLoc();
4436 // Check the IT block state first.
4437 // NOTE: In Thumb mode, the BKPT instruction has the interesting property of
4438 // being allowed in IT blocks, but not being predicable. It just always
4440 if (inITBlock() && Inst.getOpcode() != ARM::tBKPT) {
4442 if (ITState.FirstCond)
4443 ITState.FirstCond = false;
4445 bit = (ITState.Mask >> (5 - ITState.CurPosition)) & 1;
4446 // The instruction must be predicable.
4447 if (!MCID.isPredicable())
4448 return Error(Loc, "instructions in IT block must be predicable");
4449 unsigned Cond = Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm();
4450 unsigned ITCond = bit ? ITState.Cond :
4451 ARMCC::getOppositeCondition(ITState.Cond);
4452 if (Cond != ITCond) {
4453 // Find the condition code Operand to get its SMLoc information.
4455 for (unsigned i = 1; i < Operands.size(); ++i)
4456 if (static_cast<ARMOperand*>(Operands[i])->isCondCode())
4457 CondLoc = Operands[i]->getStartLoc();
4458 return Error(CondLoc, "incorrect condition in IT block; got '" +
4459 StringRef(ARMCondCodeToString(ARMCC::CondCodes(Cond))) +
4460 "', but expected '" +
4461 ARMCondCodeToString(ARMCC::CondCodes(ITCond)) + "'");
4463 // Check for non-'al' condition codes outside of the IT block.
4464 } else if (isThumbTwo() && MCID.isPredicable() &&
4465 Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm() !=
4466 ARMCC::AL && Inst.getOpcode() != ARM::tB &&
4467 Inst.getOpcode() != ARM::t2B)
4468 return Error(Loc, "predicated instructions must be in IT block");
4470 switch (Inst.getOpcode()) {
4473 case ARM::LDRD_POST:
4475 // Rt2 must be Rt + 1.
4476 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4477 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4479 return Error(Operands[3]->getStartLoc(),
4480 "destination operands must be sequential");
4484 // Rt2 must be Rt + 1.
4485 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4486 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4488 return Error(Operands[3]->getStartLoc(),
4489 "source operands must be sequential");
4493 case ARM::STRD_POST:
4495 // Rt2 must be Rt + 1.
4496 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4497 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
4499 return Error(Operands[3]->getStartLoc(),
4500 "source operands must be sequential");
4505 // width must be in range [1, 32-lsb]
4506 unsigned lsb = Inst.getOperand(2).getImm();
4507 unsigned widthm1 = Inst.getOperand(3).getImm();
4508 if (widthm1 >= 32 - lsb)
4509 return Error(Operands[5]->getStartLoc(),
4510 "bitfield width must be in range [1,32-lsb]");
4514 // If we're parsing Thumb2, the .w variant is available and handles
4515 // most cases that are normally illegal for a Thumb1 LDM
4516 // instruction. We'll make the transformation in processInstruction()
4519 // Thumb LDM instructions are writeback iff the base register is not
4520 // in the register list.
4521 unsigned Rn = Inst.getOperand(0).getReg();
4522 bool hasWritebackToken =
4523 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4524 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4525 bool listContainsBase;
4526 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) && !isThumbTwo())
4527 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
4528 "registers must be in range r0-r7");
4529 // If we should have writeback, then there should be a '!' token.
4530 if (!listContainsBase && !hasWritebackToken && !isThumbTwo())
4531 return Error(Operands[2]->getStartLoc(),
4532 "writeback operator '!' expected");
4533 // If we should not have writeback, there must not be a '!'. This is
4534 // true even for the 32-bit wide encodings.
4535 if (listContainsBase && hasWritebackToken)
4536 return Error(Operands[3]->getStartLoc(),
4537 "writeback operator '!' not allowed when base register "
4538 "in register list");
4542 case ARM::t2LDMIA_UPD: {
4543 if (listContainsReg(Inst, 3, Inst.getOperand(0).getReg()))
4544 return Error(Operands[4]->getStartLoc(),
4545 "writeback operator '!' not allowed when base register "
4546 "in register list");
4549 // Like for ldm/stm, push and pop have hi-reg handling version in Thumb2,
4550 // so only issue a diagnostic for thumb1. The instructions will be
4551 // switched to the t2 encodings in processInstruction() if necessary.
4553 bool listContainsBase;
4554 if (checkLowRegisterList(Inst, 2, 0, ARM::PC, listContainsBase) &&
4556 return Error(Operands[2]->getStartLoc(),
4557 "registers must be in range r0-r7 or pc");
4561 bool listContainsBase;
4562 if (checkLowRegisterList(Inst, 2, 0, ARM::LR, listContainsBase) &&
4564 return Error(Operands[2]->getStartLoc(),
4565 "registers must be in range r0-r7 or lr");
4568 case ARM::tSTMIA_UPD: {
4569 bool listContainsBase;
4570 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase) && !isThumbTwo())
4571 return Error(Operands[4]->getStartLoc(),
4572 "registers must be in range r0-r7");
4581 processInstruction(MCInst &Inst,
4582 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4583 switch (Inst.getOpcode()) {
4584 // Handle the MOV complex aliases.
4589 ARM_AM::ShiftOpc ShiftTy;
4590 switch(Inst.getOpcode()) {
4591 default: llvm_unreachable("unexpected opcode!");
4592 case ARM::ASRr: ShiftTy = ARM_AM::asr; break;
4593 case ARM::LSRr: ShiftTy = ARM_AM::lsr; break;
4594 case ARM::LSLr: ShiftTy = ARM_AM::lsl; break;
4595 case ARM::RORr: ShiftTy = ARM_AM::ror; break;
4597 // A shift by zero is a plain MOVr, not a MOVsi.
4598 unsigned Shifter = ARM_AM::getSORegOpc(ShiftTy, 0);
4600 TmpInst.setOpcode(ARM::MOVsr);
4601 TmpInst.addOperand(Inst.getOperand(0)); // Rd
4602 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4603 TmpInst.addOperand(Inst.getOperand(2)); // Rm
4604 TmpInst.addOperand(MCOperand::CreateImm(Shifter)); // Shift value and ty
4605 TmpInst.addOperand(Inst.getOperand(3)); // CondCode
4606 TmpInst.addOperand(Inst.getOperand(4));
4607 TmpInst.addOperand(Inst.getOperand(5)); // cc_out
4615 ARM_AM::ShiftOpc ShiftTy;
4616 switch(Inst.getOpcode()) {
4617 default: llvm_unreachable("unexpected opcode!");
4618 case ARM::ASRi: ShiftTy = ARM_AM::asr; break;
4619 case ARM::LSRi: ShiftTy = ARM_AM::lsr; break;
4620 case ARM::LSLi: ShiftTy = ARM_AM::lsl; break;
4621 case ARM::RORi: ShiftTy = ARM_AM::ror; break;
4623 // A shift by zero is a plain MOVr, not a MOVsi.
4624 unsigned Amt = Inst.getOperand(2).getImm();
4625 unsigned Opc = Amt == 0 ? ARM::MOVr : ARM::MOVsi;
4626 unsigned Shifter = ARM_AM::getSORegOpc(ShiftTy, Amt);
4628 TmpInst.setOpcode(Opc);
4629 TmpInst.addOperand(Inst.getOperand(0)); // Rd
4630 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4631 if (Opc == ARM::MOVsi)
4632 TmpInst.addOperand(MCOperand::CreateImm(Shifter)); // Shift value and ty
4633 TmpInst.addOperand(Inst.getOperand(3)); // CondCode
4634 TmpInst.addOperand(Inst.getOperand(4));
4635 TmpInst.addOperand(Inst.getOperand(5)); // cc_out
4640 unsigned Shifter = ARM_AM::getSORegOpc(ARM_AM::rrx, 0);
4642 TmpInst.setOpcode(ARM::MOVsi);
4643 TmpInst.addOperand(Inst.getOperand(0)); // Rd
4644 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4645 TmpInst.addOperand(MCOperand::CreateImm(Shifter)); // Shift value and ty
4646 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4647 TmpInst.addOperand(Inst.getOperand(3));
4648 TmpInst.addOperand(Inst.getOperand(4)); // cc_out
4652 case ARM::t2LDMIA_UPD: {
4653 // If this is a load of a single register, then we should use
4654 // a post-indexed LDR instruction instead, per the ARM ARM.
4655 if (Inst.getNumOperands() != 5)
4658 TmpInst.setOpcode(ARM::t2LDR_POST);
4659 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4660 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4661 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4662 TmpInst.addOperand(MCOperand::CreateImm(4));
4663 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4664 TmpInst.addOperand(Inst.getOperand(3));
4668 case ARM::t2STMDB_UPD: {
4669 // If this is a store of a single register, then we should use
4670 // a pre-indexed STR instruction instead, per the ARM ARM.
4671 if (Inst.getNumOperands() != 5)
4674 TmpInst.setOpcode(ARM::t2STR_PRE);
4675 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4676 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4677 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4678 TmpInst.addOperand(MCOperand::CreateImm(-4));
4679 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4680 TmpInst.addOperand(Inst.getOperand(3));
4684 case ARM::LDMIA_UPD:
4685 // If this is a load of a single register via a 'pop', then we should use
4686 // a post-indexed LDR instruction instead, per the ARM ARM.
4687 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
4688 Inst.getNumOperands() == 5) {
4690 TmpInst.setOpcode(ARM::LDR_POST_IMM);
4691 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4692 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4693 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4694 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
4695 TmpInst.addOperand(MCOperand::CreateImm(4));
4696 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4697 TmpInst.addOperand(Inst.getOperand(3));
4702 case ARM::STMDB_UPD:
4703 // If this is a store of a single register via a 'push', then we should use
4704 // a pre-indexed STR instruction instead, per the ARM ARM.
4705 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
4706 Inst.getNumOperands() == 5) {
4708 TmpInst.setOpcode(ARM::STR_PRE_IMM);
4709 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4710 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4711 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
4712 TmpInst.addOperand(MCOperand::CreateImm(-4));
4713 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4714 TmpInst.addOperand(Inst.getOperand(3));
4719 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4720 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4721 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4722 // to encoding T1 if <Rd> is omitted."
4723 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6) {
4724 Inst.setOpcode(ARM::tADDi3);
4729 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4730 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4731 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4732 // to encoding T1 if <Rd> is omitted."
4733 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6) {
4734 Inst.setOpcode(ARM::tSUBi3);
4739 // A Thumb conditional branch outside of an IT block is a tBcc.
4740 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock()) {
4741 Inst.setOpcode(ARM::tBcc);
4746 // A Thumb2 conditional branch outside of an IT block is a t2Bcc.
4747 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock()){
4748 Inst.setOpcode(ARM::t2Bcc);
4753 // If the conditional is AL or we're in an IT block, we really want t2B.
4754 if (Inst.getOperand(1).getImm() == ARMCC::AL || inITBlock()) {
4755 Inst.setOpcode(ARM::t2B);
4760 // If the conditional is AL, we really want tB.
4761 if (Inst.getOperand(1).getImm() == ARMCC::AL) {
4762 Inst.setOpcode(ARM::tB);
4767 // If the register list contains any high registers, or if the writeback
4768 // doesn't match what tLDMIA can do, we need to use the 32-bit encoding
4769 // instead if we're in Thumb2. Otherwise, this should have generated
4770 // an error in validateInstruction().
4771 unsigned Rn = Inst.getOperand(0).getReg();
4772 bool hasWritebackToken =
4773 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4774 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4775 bool listContainsBase;
4776 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) ||
4777 (!listContainsBase && !hasWritebackToken) ||
4778 (listContainsBase && hasWritebackToken)) {
4779 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4780 assert (isThumbTwo());
4781 Inst.setOpcode(hasWritebackToken ? ARM::t2LDMIA_UPD : ARM::t2LDMIA);
4782 // If we're switching to the updating version, we need to insert
4783 // the writeback tied operand.
4784 if (hasWritebackToken)
4785 Inst.insert(Inst.begin(),
4786 MCOperand::CreateReg(Inst.getOperand(0).getReg()));
4791 case ARM::tSTMIA_UPD: {
4792 // If the register list contains any high registers, we need to use
4793 // the 32-bit encoding instead if we're in Thumb2. Otherwise, this
4794 // should have generated an error in validateInstruction().
4795 unsigned Rn = Inst.getOperand(0).getReg();
4796 bool listContainsBase;
4797 if (checkLowRegisterList(Inst, 4, Rn, 0, listContainsBase)) {
4798 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4799 assert (isThumbTwo());
4800 Inst.setOpcode(ARM::t2STMIA_UPD);
4806 bool listContainsBase;
4807 // If the register list contains any high registers, we need to use
4808 // the 32-bit encoding instead if we're in Thumb2. Otherwise, this
4809 // should have generated an error in validateInstruction().
4810 if (!checkLowRegisterList(Inst, 2, 0, ARM::PC, listContainsBase))
4812 assert (isThumbTwo());
4813 Inst.setOpcode(ARM::t2LDMIA_UPD);
4814 // Add the base register and writeback operands.
4815 Inst.insert(Inst.begin(), MCOperand::CreateReg(ARM::SP));
4816 Inst.insert(Inst.begin(), MCOperand::CreateReg(ARM::SP));
4820 bool listContainsBase;
4821 if (!checkLowRegisterList(Inst, 2, 0, ARM::LR, listContainsBase))
4823 assert (isThumbTwo());
4824 Inst.setOpcode(ARM::t2STMDB_UPD);
4825 // Add the base register and writeback operands.
4826 Inst.insert(Inst.begin(), MCOperand::CreateReg(ARM::SP));
4827 Inst.insert(Inst.begin(), MCOperand::CreateReg(ARM::SP));
4831 // If we can use the 16-bit encoding and the user didn't explicitly
4832 // request the 32-bit variant, transform it here.
4833 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4834 Inst.getOperand(1).getImm() <= 255 &&
4835 ((!inITBlock() && Inst.getOperand(2).getImm() == ARMCC::AL &&
4836 Inst.getOperand(4).getReg() == ARM::CPSR) ||
4837 (inITBlock() && Inst.getOperand(4).getReg() == 0)) &&
4838 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4839 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4840 // The operands aren't in the same order for tMOVi8...
4842 TmpInst.setOpcode(ARM::tMOVi8);
4843 TmpInst.addOperand(Inst.getOperand(0));
4844 TmpInst.addOperand(Inst.getOperand(4));
4845 TmpInst.addOperand(Inst.getOperand(1));
4846 TmpInst.addOperand(Inst.getOperand(2));
4847 TmpInst.addOperand(Inst.getOperand(3));
4854 // If we can use the 16-bit encoding and the user didn't explicitly
4855 // request the 32-bit variant, transform it here.
4856 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4857 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4858 Inst.getOperand(2).getImm() == ARMCC::AL &&
4859 Inst.getOperand(4).getReg() == ARM::CPSR &&
4860 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4861 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4862 // The operands aren't the same for tMOV[S]r... (no cc_out)
4864 TmpInst.setOpcode(Inst.getOperand(4).getReg() ? ARM::tMOVSr : ARM::tMOVr);
4865 TmpInst.addOperand(Inst.getOperand(0));
4866 TmpInst.addOperand(Inst.getOperand(1));
4867 TmpInst.addOperand(Inst.getOperand(2));
4868 TmpInst.addOperand(Inst.getOperand(3));
4878 // If we can use the 16-bit encoding and the user didn't explicitly
4879 // request the 32-bit variant, transform it here.
4880 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4881 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4882 Inst.getOperand(2).getImm() == 0 &&
4883 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4884 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4886 switch (Inst.getOpcode()) {
4887 default: llvm_unreachable("Illegal opcode!");
4888 case ARM::t2SXTH: NewOpc = ARM::tSXTH; break;
4889 case ARM::t2SXTB: NewOpc = ARM::tSXTB; break;
4890 case ARM::t2UXTH: NewOpc = ARM::tUXTH; break;
4891 case ARM::t2UXTB: NewOpc = ARM::tUXTB; break;
4893 // The operands aren't the same for thumb1 (no rotate operand).
4895 TmpInst.setOpcode(NewOpc);
4896 TmpInst.addOperand(Inst.getOperand(0));
4897 TmpInst.addOperand(Inst.getOperand(1));
4898 TmpInst.addOperand(Inst.getOperand(3));
4899 TmpInst.addOperand(Inst.getOperand(4));
4906 // The mask bits for all but the first condition are represented as
4907 // the low bit of the condition code value implies 't'. We currently
4908 // always have 1 implies 't', so XOR toggle the bits if the low bit
4909 // of the condition code is zero. The encoding also expects the low
4910 // bit of the condition to be encoded as bit 4 of the mask operand,
4911 // so mask that in if needed
4912 MCOperand &MO = Inst.getOperand(1);
4913 unsigned Mask = MO.getImm();
4914 unsigned OrigMask = Mask;
4915 unsigned TZ = CountTrailingZeros_32(Mask);
4916 if ((Inst.getOperand(0).getImm() & 1) == 0) {
4917 assert(Mask && TZ <= 3 && "illegal IT mask value!");
4918 for (unsigned i = 3; i != TZ; --i)
4924 // Set up the IT block state according to the IT instruction we just
4926 assert(!inITBlock() && "nested IT blocks?!");
4927 ITState.Cond = ARMCC::CondCodes(Inst.getOperand(0).getImm());
4928 ITState.Mask = OrigMask; // Use the original mask, not the updated one.
4929 ITState.CurPosition = 0;
4930 ITState.FirstCond = true;
4937 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
4938 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
4939 // suffix depending on whether they're in an IT block or not.
4940 unsigned Opc = Inst.getOpcode();
4941 const MCInstrDesc &MCID = getInstDesc(Opc);
4942 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
4943 assert(MCID.hasOptionalDef() &&
4944 "optionally flag setting instruction missing optional def operand");
4945 assert(MCID.NumOperands == Inst.getNumOperands() &&
4946 "operand count mismatch!");
4947 // Find the optional-def operand (cc_out).
4950 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
4953 // If we're parsing Thumb1, reject it completely.
4954 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
4955 return Match_MnemonicFail;
4956 // If we're parsing Thumb2, which form is legal depends on whether we're
4958 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR &&
4960 return Match_RequiresITBlock;
4961 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() == ARM::CPSR &&
4963 return Match_RequiresNotITBlock;
4965 // Some high-register supporting Thumb1 encodings only allow both registers
4966 // to be from r0-r7 when in Thumb2.
4967 else if (Opc == ARM::tADDhirr && isThumbOne() &&
4968 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4969 isARMLowRegister(Inst.getOperand(2).getReg()))
4970 return Match_RequiresThumb2;
4971 // Others only require ARMv6 or later.
4972 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
4973 isARMLowRegister(Inst.getOperand(0).getReg()) &&
4974 isARMLowRegister(Inst.getOperand(1).getReg()))
4975 return Match_RequiresV6;
4976 return Match_Success;
4980 MatchAndEmitInstruction(SMLoc IDLoc,
4981 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
4985 unsigned MatchResult;
4986 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
4987 switch (MatchResult) {
4990 // Context sensitive operand constraints aren't handled by the matcher,
4991 // so check them here.
4992 if (validateInstruction(Inst, Operands)) {
4993 // Still progress the IT block, otherwise one wrong condition causes
4994 // nasty cascading errors.
4995 forwardITPosition();
4999 // Some instructions need post-processing to, for example, tweak which
5000 // encoding is selected. Loop on it while changes happen so the
5001 // individual transformations can chain off each other. E.g.,
5002 // tPOP(r8)->t2LDMIA_UPD(sp,r8)->t2STR_POST(sp,r8)
5003 while (processInstruction(Inst, Operands))
5006 // Only move forward at the very end so that everything in validate
5007 // and process gets a consistent answer about whether we're in an IT
5009 forwardITPosition();
5011 Out.EmitInstruction(Inst);
5013 case Match_MissingFeature:
5014 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
5016 case Match_InvalidOperand: {
5017 SMLoc ErrorLoc = IDLoc;
5018 if (ErrorInfo != ~0U) {
5019 if (ErrorInfo >= Operands.size())
5020 return Error(IDLoc, "too few operands for instruction");
5022 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
5023 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
5026 return Error(ErrorLoc, "invalid operand for instruction");
5028 case Match_MnemonicFail:
5029 return Error(IDLoc, "invalid instruction");
5030 case Match_ConversionFail:
5031 // The converter function will have already emited a diagnostic.
5033 case Match_RequiresNotITBlock:
5034 return Error(IDLoc, "flag setting instruction only valid outside IT block");
5035 case Match_RequiresITBlock:
5036 return Error(IDLoc, "instruction only valid inside IT block");
5037 case Match_RequiresV6:
5038 return Error(IDLoc, "instruction variant requires ARMv6 or later");
5039 case Match_RequiresThumb2:
5040 return Error(IDLoc, "instruction variant requires Thumb2");
5043 llvm_unreachable("Implement any new match types added!");
5047 /// parseDirective parses the arm specific directives
5048 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
5049 StringRef IDVal = DirectiveID.getIdentifier();
5050 if (IDVal == ".word")
5051 return parseDirectiveWord(4, DirectiveID.getLoc());
5052 else if (IDVal == ".thumb")
5053 return parseDirectiveThumb(DirectiveID.getLoc());
5054 else if (IDVal == ".thumb_func")
5055 return parseDirectiveThumbFunc(DirectiveID.getLoc());
5056 else if (IDVal == ".code")
5057 return parseDirectiveCode(DirectiveID.getLoc());
5058 else if (IDVal == ".syntax")
5059 return parseDirectiveSyntax(DirectiveID.getLoc());
5063 /// parseDirectiveWord
5064 /// ::= .word [ expression (, expression)* ]
5065 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
5066 if (getLexer().isNot(AsmToken::EndOfStatement)) {
5068 const MCExpr *Value;
5069 if (getParser().ParseExpression(Value))
5072 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
5074 if (getLexer().is(AsmToken::EndOfStatement))
5077 // FIXME: Improve diagnostic.
5078 if (getLexer().isNot(AsmToken::Comma))
5079 return Error(L, "unexpected token in directive");
5088 /// parseDirectiveThumb
5090 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
5091 if (getLexer().isNot(AsmToken::EndOfStatement))
5092 return Error(L, "unexpected token in directive");
5095 // TODO: set thumb mode
5096 // TODO: tell the MC streamer the mode
5097 // getParser().getStreamer().Emit???();
5101 /// parseDirectiveThumbFunc
5102 /// ::= .thumbfunc symbol_name
5103 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
5104 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
5105 bool isMachO = MAI.hasSubsectionsViaSymbols();
5108 // Darwin asm has function name after .thumb_func direction
5111 const AsmToken &Tok = Parser.getTok();
5112 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
5113 return Error(L, "unexpected token in .thumb_func directive");
5114 Name = Tok.getIdentifier();
5115 Parser.Lex(); // Consume the identifier token.
5118 if (getLexer().isNot(AsmToken::EndOfStatement))
5119 return Error(L, "unexpected token in directive");
5122 // FIXME: assuming function name will be the line following .thumb_func
5124 Name = Parser.getTok().getIdentifier();
5127 // Mark symbol as a thumb symbol.
5128 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
5129 getParser().getStreamer().EmitThumbFunc(Func);
5133 /// parseDirectiveSyntax
5134 /// ::= .syntax unified | divided
5135 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
5136 const AsmToken &Tok = Parser.getTok();
5137 if (Tok.isNot(AsmToken::Identifier))
5138 return Error(L, "unexpected token in .syntax directive");
5139 StringRef Mode = Tok.getString();
5140 if (Mode == "unified" || Mode == "UNIFIED")
5142 else if (Mode == "divided" || Mode == "DIVIDED")
5143 return Error(L, "'.syntax divided' arm asssembly not supported");
5145 return Error(L, "unrecognized syntax mode in .syntax directive");
5147 if (getLexer().isNot(AsmToken::EndOfStatement))
5148 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
5151 // TODO tell the MC streamer the mode
5152 // getParser().getStreamer().Emit???();
5156 /// parseDirectiveCode
5157 /// ::= .code 16 | 32
5158 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
5159 const AsmToken &Tok = Parser.getTok();
5160 if (Tok.isNot(AsmToken::Integer))
5161 return Error(L, "unexpected token in .code directive");
5162 int64_t Val = Parser.getTok().getIntVal();
5168 return Error(L, "invalid operand to .code directive");
5170 if (getLexer().isNot(AsmToken::EndOfStatement))
5171 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
5177 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
5181 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
5187 extern "C" void LLVMInitializeARMAsmLexer();
5189 /// Force static initialization.
5190 extern "C" void LLVMInitializeARMAsmParser() {
5191 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
5192 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
5193 LLVMInitializeARMAsmLexer();
5196 #define GET_REGISTER_MATCHER
5197 #define GET_MATCHER_IMPLEMENTATION
5198 #include "ARMGenAsmMatcher.inc"