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 addVecListOneDOperands(MCInst &Inst, unsigned N) const {
1531 assert(N == 1 && "Invalid number of operands!");
1532 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1535 void addVecListTwoDOperands(MCInst &Inst, unsigned N) const {
1536 assert(N == 1 && "Invalid number of operands!");
1537 // Only the first register actually goes on the instruction. The rest
1538 // are implied by the opcode.
1539 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1542 void addVecListThreeDOperands(MCInst &Inst, unsigned N) const {
1543 assert(N == 1 && "Invalid number of operands!");
1544 // Only the first register actually goes on the instruction. The rest
1545 // are implied by the opcode.
1546 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1549 void addVecListFourDOperands(MCInst &Inst, unsigned N) const {
1550 assert(N == 1 && "Invalid number of operands!");
1551 // Only the first register actually goes on the instruction. The rest
1552 // are implied by the opcode.
1553 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1556 void addVecListTwoQOperands(MCInst &Inst, unsigned N) const {
1557 assert(N == 1 && "Invalid number of operands!");
1558 // Only the first register actually goes on the instruction. The rest
1559 // are implied by the opcode.
1560 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1563 void addVectorIndex8Operands(MCInst &Inst, unsigned N) const {
1564 assert(N == 1 && "Invalid number of operands!");
1565 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1568 void addVectorIndex16Operands(MCInst &Inst, unsigned N) const {
1569 assert(N == 1 && "Invalid number of operands!");
1570 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1573 void addVectorIndex32Operands(MCInst &Inst, unsigned N) const {
1574 assert(N == 1 && "Invalid number of operands!");
1575 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1578 void addNEONi8splatOperands(MCInst &Inst, unsigned N) const {
1579 assert(N == 1 && "Invalid number of operands!");
1580 // The immediate encodes the type of constant as well as the value.
1581 // Mask in that this is an i8 splat.
1582 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1583 Inst.addOperand(MCOperand::CreateImm(CE->getValue() | 0xe00));
1586 void addNEONi16splatOperands(MCInst &Inst, unsigned N) const {
1587 assert(N == 1 && "Invalid number of operands!");
1588 // The immediate encodes the type of constant as well as the value.
1589 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1590 unsigned Value = CE->getValue();
1592 Value = (Value >> 8) | 0xa00;
1595 Inst.addOperand(MCOperand::CreateImm(Value));
1598 void addNEONi32splatOperands(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 unsigned Value = CE->getValue();
1603 if (Value >= 256 && Value <= 0xff00)
1604 Value = (Value >> 8) | 0x200;
1605 else if (Value > 0xffff && Value <= 0xff0000)
1606 Value = (Value >> 16) | 0x400;
1607 else if (Value > 0xffffff)
1608 Value = (Value >> 24) | 0x600;
1609 Inst.addOperand(MCOperand::CreateImm(Value));
1612 void addNEONi32vmovOperands(MCInst &Inst, unsigned N) const {
1613 assert(N == 1 && "Invalid number of operands!");
1614 // The immediate encodes the type of constant as well as the value.
1615 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1616 unsigned Value = CE->getValue();
1617 if (Value >= 256 && Value <= 0xffff)
1618 Value = (Value >> 8) | ((Value & 0xff) ? 0xc00 : 0x200);
1619 else if (Value > 0xffff && Value <= 0xffffff)
1620 Value = (Value >> 16) | ((Value & 0xff) ? 0xd00 : 0x400);
1621 else if (Value > 0xffffff)
1622 Value = (Value >> 24) | 0x600;
1623 Inst.addOperand(MCOperand::CreateImm(Value));
1626 void addNEONi64splatOperands(MCInst &Inst, unsigned N) const {
1627 assert(N == 1 && "Invalid number of operands!");
1628 // The immediate encodes the type of constant as well as the value.
1629 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1630 uint64_t Value = CE->getValue();
1632 for (unsigned i = 0; i < 8; ++i, Value >>= 8) {
1633 Imm |= (Value & 1) << i;
1635 Inst.addOperand(MCOperand::CreateImm(Imm | 0x1e00));
1638 virtual void print(raw_ostream &OS) const;
1640 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1641 ARMOperand *Op = new ARMOperand(k_ITCondMask);
1642 Op->ITMask.Mask = Mask;
1648 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1649 ARMOperand *Op = new ARMOperand(k_CondCode);
1656 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1657 ARMOperand *Op = new ARMOperand(k_CoprocNum);
1658 Op->Cop.Val = CopVal;
1664 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1665 ARMOperand *Op = new ARMOperand(k_CoprocReg);
1666 Op->Cop.Val = CopVal;
1672 static ARMOperand *CreateCoprocOption(unsigned Val, SMLoc S, SMLoc E) {
1673 ARMOperand *Op = new ARMOperand(k_CoprocOption);
1680 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1681 ARMOperand *Op = new ARMOperand(k_CCOut);
1682 Op->Reg.RegNum = RegNum;
1688 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1689 ARMOperand *Op = new ARMOperand(k_Token);
1690 Op->Tok.Data = Str.data();
1691 Op->Tok.Length = Str.size();
1697 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1698 ARMOperand *Op = new ARMOperand(k_Register);
1699 Op->Reg.RegNum = RegNum;
1705 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1710 ARMOperand *Op = new ARMOperand(k_ShiftedRegister);
1711 Op->RegShiftedReg.ShiftTy = ShTy;
1712 Op->RegShiftedReg.SrcReg = SrcReg;
1713 Op->RegShiftedReg.ShiftReg = ShiftReg;
1714 Op->RegShiftedReg.ShiftImm = ShiftImm;
1720 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1724 ARMOperand *Op = new ARMOperand(k_ShiftedImmediate);
1725 Op->RegShiftedImm.ShiftTy = ShTy;
1726 Op->RegShiftedImm.SrcReg = SrcReg;
1727 Op->RegShiftedImm.ShiftImm = ShiftImm;
1733 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1735 ARMOperand *Op = new ARMOperand(k_ShifterImmediate);
1736 Op->ShifterImm.isASR = isASR;
1737 Op->ShifterImm.Imm = Imm;
1743 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1744 ARMOperand *Op = new ARMOperand(k_RotateImmediate);
1745 Op->RotImm.Imm = Imm;
1751 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1753 ARMOperand *Op = new ARMOperand(k_BitfieldDescriptor);
1754 Op->Bitfield.LSB = LSB;
1755 Op->Bitfield.Width = Width;
1762 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1763 SMLoc StartLoc, SMLoc EndLoc) {
1764 KindTy Kind = k_RegisterList;
1766 if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Regs.front().first))
1767 Kind = k_DPRRegisterList;
1768 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].
1769 contains(Regs.front().first))
1770 Kind = k_SPRRegisterList;
1772 ARMOperand *Op = new ARMOperand(Kind);
1773 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1774 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1775 Op->Registers.push_back(I->first);
1776 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1777 Op->StartLoc = StartLoc;
1778 Op->EndLoc = EndLoc;
1782 static ARMOperand *CreateVectorList(unsigned RegNum, unsigned Count,
1784 ARMOperand *Op = new ARMOperand(k_VectorList);
1785 Op->VectorList.RegNum = RegNum;
1786 Op->VectorList.Count = Count;
1792 static ARMOperand *CreateVectorIndex(unsigned Idx, SMLoc S, SMLoc E,
1794 ARMOperand *Op = new ARMOperand(k_VectorIndex);
1795 Op->VectorIndex.Val = Idx;
1801 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1802 ARMOperand *Op = new ARMOperand(k_Immediate);
1809 static ARMOperand *CreateFPImm(unsigned Val, SMLoc S, MCContext &Ctx) {
1810 ARMOperand *Op = new ARMOperand(k_FPImmediate);
1811 Op->FPImm.Val = Val;
1817 static ARMOperand *CreateMem(unsigned BaseRegNum,
1818 const MCConstantExpr *OffsetImm,
1819 unsigned OffsetRegNum,
1820 ARM_AM::ShiftOpc ShiftType,
1825 ARMOperand *Op = new ARMOperand(k_Memory);
1826 Op->Memory.BaseRegNum = BaseRegNum;
1827 Op->Memory.OffsetImm = OffsetImm;
1828 Op->Memory.OffsetRegNum = OffsetRegNum;
1829 Op->Memory.ShiftType = ShiftType;
1830 Op->Memory.ShiftImm = ShiftImm;
1831 Op->Memory.Alignment = Alignment;
1832 Op->Memory.isNegative = isNegative;
1838 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1839 ARM_AM::ShiftOpc ShiftTy,
1842 ARMOperand *Op = new ARMOperand(k_PostIndexRegister);
1843 Op->PostIdxReg.RegNum = RegNum;
1844 Op->PostIdxReg.isAdd = isAdd;
1845 Op->PostIdxReg.ShiftTy = ShiftTy;
1846 Op->PostIdxReg.ShiftImm = ShiftImm;
1852 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1853 ARMOperand *Op = new ARMOperand(k_MemBarrierOpt);
1854 Op->MBOpt.Val = Opt;
1860 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1861 ARMOperand *Op = new ARMOperand(k_ProcIFlags);
1862 Op->IFlags.Val = IFlags;
1868 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1869 ARMOperand *Op = new ARMOperand(k_MSRMask);
1870 Op->MMask.Val = MMask;
1877 } // end anonymous namespace.
1879 void ARMOperand::print(raw_ostream &OS) const {
1882 OS << "<fpimm " << getFPImm() << "(" << ARM_AM::getFPImmFloat(getFPImm())
1886 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1889 OS << "<ccout " << getReg() << ">";
1891 case k_ITCondMask: {
1892 static const char *MaskStr[] = {
1893 "()", "(t)", "(e)", "(tt)", "(et)", "(te)", "(ee)", "(ttt)", "(ett)",
1894 "(tet)", "(eet)", "(tte)", "(ete)", "(tee)", "(eee)"
1896 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1897 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1901 OS << "<coprocessor number: " << getCoproc() << ">";
1904 OS << "<coprocessor register: " << getCoproc() << ">";
1906 case k_CoprocOption:
1907 OS << "<coprocessor option: " << CoprocOption.Val << ">";
1910 OS << "<mask: " << getMSRMask() << ">";
1913 getImm()->print(OS);
1915 case k_MemBarrierOpt:
1916 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1920 << " base:" << Memory.BaseRegNum;
1923 case k_PostIndexRegister:
1924 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1925 << PostIdxReg.RegNum;
1926 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1927 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1928 << PostIdxReg.ShiftImm;
1931 case k_ProcIFlags: {
1932 OS << "<ARM_PROC::";
1933 unsigned IFlags = getProcIFlags();
1934 for (int i=2; i >= 0; --i)
1935 if (IFlags & (1 << i))
1936 OS << ARM_PROC::IFlagsToString(1 << i);
1941 OS << "<register " << getReg() << ">";
1943 case k_ShifterImmediate:
1944 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1945 << " #" << ShifterImm.Imm << ">";
1947 case k_ShiftedRegister:
1948 OS << "<so_reg_reg "
1949 << RegShiftedReg.SrcReg << " "
1950 << ARM_AM::getShiftOpcStr(RegShiftedReg.ShiftTy)
1951 << " " << RegShiftedReg.ShiftReg << ">";
1953 case k_ShiftedImmediate:
1954 OS << "<so_reg_imm "
1955 << RegShiftedImm.SrcReg << " "
1956 << ARM_AM::getShiftOpcStr(RegShiftedImm.ShiftTy)
1957 << " #" << RegShiftedImm.ShiftImm << ">";
1959 case k_RotateImmediate:
1960 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1962 case k_BitfieldDescriptor:
1963 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1964 << ", width: " << Bitfield.Width << ">";
1966 case k_RegisterList:
1967 case k_DPRRegisterList:
1968 case k_SPRRegisterList: {
1969 OS << "<register_list ";
1971 const SmallVectorImpl<unsigned> &RegList = getRegList();
1972 for (SmallVectorImpl<unsigned>::const_iterator
1973 I = RegList.begin(), E = RegList.end(); I != E; ) {
1975 if (++I < E) OS << ", ";
1982 OS << "<vector_list " << VectorList.Count << " * "
1983 << VectorList.RegNum << ">";
1986 OS << "'" << getToken() << "'";
1989 OS << "<vectorindex " << getVectorIndex() << ">";
1994 /// @name Auto-generated Match Functions
1997 static unsigned MatchRegisterName(StringRef Name);
2001 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
2002 SMLoc &StartLoc, SMLoc &EndLoc) {
2003 RegNo = tryParseRegister();
2005 return (RegNo == (unsigned)-1);
2008 /// Try to parse a register name. The token must be an Identifier when called,
2009 /// and if it is a register name the token is eaten and the register number is
2010 /// returned. Otherwise return -1.
2012 int ARMAsmParser::tryParseRegister() {
2013 const AsmToken &Tok = Parser.getTok();
2014 if (Tok.isNot(AsmToken::Identifier)) return -1;
2016 // FIXME: Validate register for the current architecture; we have to do
2017 // validation later, so maybe there is no need for this here.
2018 std::string lowerCase = Tok.getString().lower();
2019 unsigned RegNum = MatchRegisterName(lowerCase);
2021 RegNum = StringSwitch<unsigned>(lowerCase)
2022 .Case("r13", ARM::SP)
2023 .Case("r14", ARM::LR)
2024 .Case("r15", ARM::PC)
2025 .Case("ip", ARM::R12)
2028 if (!RegNum) return -1;
2030 Parser.Lex(); // Eat identifier token.
2035 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
2036 // If a recoverable error occurs, return 1. If an irrecoverable error
2037 // occurs, return -1. An irrecoverable error is one where tokens have been
2038 // consumed in the process of trying to parse the shifter (i.e., when it is
2039 // indeed a shifter operand, but malformed).
2040 int ARMAsmParser::tryParseShiftRegister(
2041 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2042 SMLoc S = Parser.getTok().getLoc();
2043 const AsmToken &Tok = Parser.getTok();
2044 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2046 std::string lowerCase = Tok.getString().lower();
2047 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
2048 .Case("lsl", ARM_AM::lsl)
2049 .Case("lsr", ARM_AM::lsr)
2050 .Case("asr", ARM_AM::asr)
2051 .Case("ror", ARM_AM::ror)
2052 .Case("rrx", ARM_AM::rrx)
2053 .Default(ARM_AM::no_shift);
2055 if (ShiftTy == ARM_AM::no_shift)
2058 Parser.Lex(); // Eat the operator.
2060 // The source register for the shift has already been added to the
2061 // operand list, so we need to pop it off and combine it into the shifted
2062 // register operand instead.
2063 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
2064 if (!PrevOp->isReg())
2065 return Error(PrevOp->getStartLoc(), "shift must be of a register");
2066 int SrcReg = PrevOp->getReg();
2069 if (ShiftTy == ARM_AM::rrx) {
2070 // RRX Doesn't have an explicit shift amount. The encoder expects
2071 // the shift register to be the same as the source register. Seems odd,
2075 // Figure out if this is shifted by a constant or a register (for non-RRX).
2076 if (Parser.getTok().is(AsmToken::Hash)) {
2077 Parser.Lex(); // Eat hash.
2078 SMLoc ImmLoc = Parser.getTok().getLoc();
2079 const MCExpr *ShiftExpr = 0;
2080 if (getParser().ParseExpression(ShiftExpr)) {
2081 Error(ImmLoc, "invalid immediate shift value");
2084 // The expression must be evaluatable as an immediate.
2085 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
2087 Error(ImmLoc, "invalid immediate shift value");
2090 // Range check the immediate.
2091 // lsl, ror: 0 <= imm <= 31
2092 // lsr, asr: 0 <= imm <= 32
2093 Imm = CE->getValue();
2095 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
2096 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
2097 Error(ImmLoc, "immediate shift value out of range");
2100 } else if (Parser.getTok().is(AsmToken::Identifier)) {
2101 ShiftReg = tryParseRegister();
2102 SMLoc L = Parser.getTok().getLoc();
2103 if (ShiftReg == -1) {
2104 Error (L, "expected immediate or register in shift operand");
2108 Error (Parser.getTok().getLoc(),
2109 "expected immediate or register in shift operand");
2114 if (ShiftReg && ShiftTy != ARM_AM::rrx)
2115 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
2117 S, Parser.getTok().getLoc()));
2119 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
2120 S, Parser.getTok().getLoc()));
2126 /// Try to parse a register name. The token must be an Identifier when called.
2127 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
2128 /// if there is a "writeback". 'true' if it's not a register.
2130 /// TODO this is likely to change to allow different register types and or to
2131 /// parse for a specific register type.
2133 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2134 SMLoc S = Parser.getTok().getLoc();
2135 int RegNo = tryParseRegister();
2139 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
2141 const AsmToken &ExclaimTok = Parser.getTok();
2142 if (ExclaimTok.is(AsmToken::Exclaim)) {
2143 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
2144 ExclaimTok.getLoc()));
2145 Parser.Lex(); // Eat exclaim token
2149 // Also check for an index operand. This is only legal for vector registers,
2150 // but that'll get caught OK in operand matching, so we don't need to
2151 // explicitly filter everything else out here.
2152 if (Parser.getTok().is(AsmToken::LBrac)) {
2153 SMLoc SIdx = Parser.getTok().getLoc();
2154 Parser.Lex(); // Eat left bracket token.
2156 const MCExpr *ImmVal;
2157 if (getParser().ParseExpression(ImmVal))
2158 return MatchOperand_ParseFail;
2159 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
2161 TokError("immediate value expected for vector index");
2162 return MatchOperand_ParseFail;
2165 SMLoc E = Parser.getTok().getLoc();
2166 if (Parser.getTok().isNot(AsmToken::RBrac)) {
2167 Error(E, "']' expected");
2168 return MatchOperand_ParseFail;
2171 Parser.Lex(); // Eat right bracket token.
2173 Operands.push_back(ARMOperand::CreateVectorIndex(MCE->getValue(),
2181 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
2182 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
2184 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
2185 // Use the same layout as the tablegen'erated register name matcher. Ugly,
2187 switch (Name.size()) {
2190 if (Name[0] != CoprocOp)
2207 if (Name[0] != CoprocOp || Name[1] != '1')
2211 case '0': return 10;
2212 case '1': return 11;
2213 case '2': return 12;
2214 case '3': return 13;
2215 case '4': return 14;
2216 case '5': return 15;
2224 /// parseITCondCode - Try to parse a condition code for an IT instruction.
2225 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2226 parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2227 SMLoc S = Parser.getTok().getLoc();
2228 const AsmToken &Tok = Parser.getTok();
2229 if (!Tok.is(AsmToken::Identifier))
2230 return MatchOperand_NoMatch;
2231 unsigned CC = StringSwitch<unsigned>(Tok.getString())
2232 .Case("eq", ARMCC::EQ)
2233 .Case("ne", ARMCC::NE)
2234 .Case("hs", ARMCC::HS)
2235 .Case("cs", ARMCC::HS)
2236 .Case("lo", ARMCC::LO)
2237 .Case("cc", ARMCC::LO)
2238 .Case("mi", ARMCC::MI)
2239 .Case("pl", ARMCC::PL)
2240 .Case("vs", ARMCC::VS)
2241 .Case("vc", ARMCC::VC)
2242 .Case("hi", ARMCC::HI)
2243 .Case("ls", ARMCC::LS)
2244 .Case("ge", ARMCC::GE)
2245 .Case("lt", ARMCC::LT)
2246 .Case("gt", ARMCC::GT)
2247 .Case("le", ARMCC::LE)
2248 .Case("al", ARMCC::AL)
2251 return MatchOperand_NoMatch;
2252 Parser.Lex(); // Eat the token.
2254 Operands.push_back(ARMOperand::CreateCondCode(ARMCC::CondCodes(CC), S));
2256 return MatchOperand_Success;
2259 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
2260 /// token must be an Identifier when called, and if it is a coprocessor
2261 /// number, the token is eaten and the operand is added to the operand list.
2262 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2263 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2264 SMLoc S = Parser.getTok().getLoc();
2265 const AsmToken &Tok = Parser.getTok();
2266 if (Tok.isNot(AsmToken::Identifier))
2267 return MatchOperand_NoMatch;
2269 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
2271 return MatchOperand_NoMatch;
2273 Parser.Lex(); // Eat identifier token.
2274 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
2275 return MatchOperand_Success;
2278 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
2279 /// token must be an Identifier when called, and if it is a coprocessor
2280 /// number, the token is eaten and the operand is added to the operand list.
2281 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2282 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2283 SMLoc S = Parser.getTok().getLoc();
2284 const AsmToken &Tok = Parser.getTok();
2285 if (Tok.isNot(AsmToken::Identifier))
2286 return MatchOperand_NoMatch;
2288 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
2290 return MatchOperand_NoMatch;
2292 Parser.Lex(); // Eat identifier token.
2293 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
2294 return MatchOperand_Success;
2297 /// parseCoprocOptionOperand - Try to parse an coprocessor option operand.
2298 /// coproc_option : '{' imm0_255 '}'
2299 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2300 parseCoprocOptionOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2301 SMLoc S = Parser.getTok().getLoc();
2303 // If this isn't a '{', this isn't a coprocessor immediate operand.
2304 if (Parser.getTok().isNot(AsmToken::LCurly))
2305 return MatchOperand_NoMatch;
2306 Parser.Lex(); // Eat the '{'
2309 SMLoc Loc = Parser.getTok().getLoc();
2310 if (getParser().ParseExpression(Expr)) {
2311 Error(Loc, "illegal expression");
2312 return MatchOperand_ParseFail;
2314 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2315 if (!CE || CE->getValue() < 0 || CE->getValue() > 255) {
2316 Error(Loc, "coprocessor option must be an immediate in range [0, 255]");
2317 return MatchOperand_ParseFail;
2319 int Val = CE->getValue();
2321 // Check for and consume the closing '}'
2322 if (Parser.getTok().isNot(AsmToken::RCurly))
2323 return MatchOperand_ParseFail;
2324 SMLoc E = Parser.getTok().getLoc();
2325 Parser.Lex(); // Eat the '}'
2327 Operands.push_back(ARMOperand::CreateCoprocOption(Val, S, E));
2328 return MatchOperand_Success;
2331 // For register list parsing, we need to map from raw GPR register numbering
2332 // to the enumeration values. The enumeration values aren't sorted by
2333 // register number due to our using "sp", "lr" and "pc" as canonical names.
2334 static unsigned getNextRegister(unsigned Reg) {
2335 // If this is a GPR, we need to do it manually, otherwise we can rely
2336 // on the sort ordering of the enumeration since the other reg-classes
2338 if (!ARMMCRegisterClasses[ARM::GPRRegClassID].contains(Reg))
2341 default: assert(0 && "Invalid GPR number!");
2342 case ARM::R0: return ARM::R1; case ARM::R1: return ARM::R2;
2343 case ARM::R2: return ARM::R3; case ARM::R3: return ARM::R4;
2344 case ARM::R4: return ARM::R5; case ARM::R5: return ARM::R6;
2345 case ARM::R6: return ARM::R7; case ARM::R7: return ARM::R8;
2346 case ARM::R8: return ARM::R9; case ARM::R9: return ARM::R10;
2347 case ARM::R10: return ARM::R11; case ARM::R11: return ARM::R12;
2348 case ARM::R12: return ARM::SP; case ARM::SP: return ARM::LR;
2349 case ARM::LR: return ARM::PC; case ARM::PC: return ARM::R0;
2353 // Return the low-subreg of a given Q register.
2354 static unsigned getDRegFromQReg(unsigned QReg) {
2356 default: llvm_unreachable("expected a Q register!");
2357 case ARM::Q0: return ARM::D0;
2358 case ARM::Q1: return ARM::D2;
2359 case ARM::Q2: return ARM::D4;
2360 case ARM::Q3: return ARM::D6;
2361 case ARM::Q4: return ARM::D8;
2362 case ARM::Q5: return ARM::D10;
2363 case ARM::Q6: return ARM::D12;
2364 case ARM::Q7: return ARM::D14;
2365 case ARM::Q8: return ARM::D16;
2366 case ARM::Q9: return ARM::D18;
2367 case ARM::Q10: return ARM::D20;
2368 case ARM::Q11: return ARM::D22;
2369 case ARM::Q12: return ARM::D24;
2370 case ARM::Q13: return ARM::D26;
2371 case ARM::Q14: return ARM::D28;
2372 case ARM::Q15: return ARM::D30;
2376 /// Parse a register list.
2378 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2379 assert(Parser.getTok().is(AsmToken::LCurly) &&
2380 "Token is not a Left Curly Brace");
2381 SMLoc S = Parser.getTok().getLoc();
2382 Parser.Lex(); // Eat '{' token.
2383 SMLoc RegLoc = Parser.getTok().getLoc();
2385 // Check the first register in the list to see what register class
2386 // this is a list of.
2387 int Reg = tryParseRegister();
2389 return Error(RegLoc, "register expected");
2391 // The reglist instructions have at most 16 registers, so reserve
2392 // space for that many.
2393 SmallVector<std::pair<unsigned, SMLoc>, 16> Registers;
2395 // Allow Q regs and just interpret them as the two D sub-registers.
2396 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2397 Reg = getDRegFromQReg(Reg);
2398 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2401 const MCRegisterClass *RC;
2402 if (ARMMCRegisterClasses[ARM::GPRRegClassID].contains(Reg))
2403 RC = &ARMMCRegisterClasses[ARM::GPRRegClassID];
2404 else if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg))
2405 RC = &ARMMCRegisterClasses[ARM::DPRRegClassID];
2406 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].contains(Reg))
2407 RC = &ARMMCRegisterClasses[ARM::SPRRegClassID];
2409 return Error(RegLoc, "invalid register in register list");
2411 // Store the register.
2412 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2414 // This starts immediately after the first register token in the list,
2415 // so we can see either a comma or a minus (range separator) as a legal
2417 while (Parser.getTok().is(AsmToken::Comma) ||
2418 Parser.getTok().is(AsmToken::Minus)) {
2419 if (Parser.getTok().is(AsmToken::Minus)) {
2420 Parser.Lex(); // Eat the minus.
2421 SMLoc EndLoc = Parser.getTok().getLoc();
2422 int EndReg = tryParseRegister();
2424 return Error(EndLoc, "register expected");
2425 // Allow Q regs and just interpret them as the two D sub-registers.
2426 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(EndReg))
2427 EndReg = getDRegFromQReg(EndReg) + 1;
2428 // If the register is the same as the start reg, there's nothing
2432 // The register must be in the same register class as the first.
2433 if (!RC->contains(EndReg))
2434 return Error(EndLoc, "invalid register in register list");
2435 // Ranges must go from low to high.
2436 if (getARMRegisterNumbering(Reg) > getARMRegisterNumbering(EndReg))
2437 return Error(EndLoc, "bad range in register list");
2439 // Add all the registers in the range to the register list.
2440 while (Reg != EndReg) {
2441 Reg = getNextRegister(Reg);
2442 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2446 Parser.Lex(); // Eat the comma.
2447 RegLoc = Parser.getTok().getLoc();
2449 Reg = tryParseRegister();
2451 return Error(RegLoc, "register expected");
2452 // Allow Q regs and just interpret them as the two D sub-registers.
2453 bool isQReg = false;
2454 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2455 Reg = getDRegFromQReg(Reg);
2458 // The register must be in the same register class as the first.
2459 if (!RC->contains(Reg))
2460 return Error(RegLoc, "invalid register in register list");
2461 // List must be monotonically increasing.
2462 if (getARMRegisterNumbering(Reg) <= getARMRegisterNumbering(OldReg))
2463 return Error(RegLoc, "register list not in ascending order");
2464 // VFP register lists must also be contiguous.
2465 // It's OK to use the enumeration values directly here rather, as the
2466 // VFP register classes have the enum sorted properly.
2467 if (RC != &ARMMCRegisterClasses[ARM::GPRRegClassID] &&
2469 return Error(RegLoc, "non-contiguous register range");
2470 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2472 Registers.push_back(std::pair<unsigned, SMLoc>(++Reg, RegLoc));
2475 SMLoc E = Parser.getTok().getLoc();
2476 if (Parser.getTok().isNot(AsmToken::RCurly))
2477 return Error(E, "'}' expected");
2478 Parser.Lex(); // Eat '}' token.
2480 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
2484 // parse a vector register list
2485 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2486 parseVectorList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2487 SMLoc S = Parser.getTok().getLoc();
2488 // As an extension (to match gas), support a plain D register or Q register
2489 // (without encosing curly braces) as a single or double entry list,
2491 if (Parser.getTok().is(AsmToken::Identifier)) {
2492 int Reg = tryParseRegister();
2494 return MatchOperand_NoMatch;
2495 SMLoc E = Parser.getTok().getLoc();
2496 if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg)) {
2497 Operands.push_back(ARMOperand::CreateVectorList(Reg, 1, S, E));
2498 return MatchOperand_Success;
2500 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2501 Reg = getDRegFromQReg(Reg);
2502 Operands.push_back(ARMOperand::CreateVectorList(Reg, 2, S, E));
2503 return MatchOperand_Success;
2505 Error(S, "vector register expected");
2506 return MatchOperand_ParseFail;
2509 if (Parser.getTok().isNot(AsmToken::LCurly))
2510 return MatchOperand_NoMatch;
2512 Parser.Lex(); // Eat '{' token.
2513 SMLoc RegLoc = Parser.getTok().getLoc();
2515 int Reg = tryParseRegister();
2517 Error(RegLoc, "register expected");
2518 return MatchOperand_ParseFail;
2521 unsigned FirstReg = Reg;
2522 // The list is of D registers, but we also allow Q regs and just interpret
2523 // them as the two D sub-registers.
2524 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2525 FirstReg = Reg = getDRegFromQReg(Reg);
2530 while (Parser.getTok().is(AsmToken::Comma) ||
2531 Parser.getTok().is(AsmToken::Minus)) {
2532 if (Parser.getTok().is(AsmToken::Minus)) {
2533 Parser.Lex(); // Eat the minus.
2534 SMLoc EndLoc = Parser.getTok().getLoc();
2535 int EndReg = tryParseRegister();
2537 Error(EndLoc, "register expected");
2538 return MatchOperand_ParseFail;
2540 // Allow Q regs and just interpret them as the two D sub-registers.
2541 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(EndReg))
2542 EndReg = getDRegFromQReg(EndReg) + 1;
2543 // If the register is the same as the start reg, there's nothing
2547 // The register must be in the same register class as the first.
2548 if (!ARMMCRegisterClasses[ARM::DPRRegClassID].contains(EndReg)) {
2549 Error(EndLoc, "invalid register in register list");
2550 return MatchOperand_ParseFail;
2552 // Ranges must go from low to high.
2554 Error(EndLoc, "bad range in register list");
2555 return MatchOperand_ParseFail;
2558 // Add all the registers in the range to the register list.
2559 Count += EndReg - Reg;
2563 Parser.Lex(); // Eat the comma.
2564 RegLoc = Parser.getTok().getLoc();
2566 Reg = tryParseRegister();
2568 Error(RegLoc, "register expected");
2569 return MatchOperand_ParseFail;
2571 // vector register lists must be contiguous.
2572 // It's OK to use the enumeration values directly here rather, as the
2573 // VFP register classes have the enum sorted properly.
2575 // The list is of D registers, but we also allow Q regs and just interpret
2576 // them as the two D sub-registers.
2577 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2578 Reg = getDRegFromQReg(Reg);
2579 if (Reg != OldReg + 1) {
2580 Error(RegLoc, "non-contiguous register range");
2581 return MatchOperand_ParseFail;
2587 // Normal D register. Just check that it's contiguous and keep going.
2588 if (Reg != OldReg + 1) {
2589 Error(RegLoc, "non-contiguous register range");
2590 return MatchOperand_ParseFail;
2595 SMLoc E = Parser.getTok().getLoc();
2596 if (Parser.getTok().isNot(AsmToken::RCurly)) {
2597 Error(E, "'}' expected");
2598 return MatchOperand_ParseFail;
2600 Parser.Lex(); // Eat '}' token.
2602 Operands.push_back(ARMOperand::CreateVectorList(FirstReg, Count, S, E));
2603 return MatchOperand_Success;
2606 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
2607 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2608 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2609 SMLoc S = Parser.getTok().getLoc();
2610 const AsmToken &Tok = Parser.getTok();
2611 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2612 StringRef OptStr = Tok.getString();
2614 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
2615 .Case("sy", ARM_MB::SY)
2616 .Case("st", ARM_MB::ST)
2617 .Case("sh", ARM_MB::ISH)
2618 .Case("ish", ARM_MB::ISH)
2619 .Case("shst", ARM_MB::ISHST)
2620 .Case("ishst", ARM_MB::ISHST)
2621 .Case("nsh", ARM_MB::NSH)
2622 .Case("un", ARM_MB::NSH)
2623 .Case("nshst", ARM_MB::NSHST)
2624 .Case("unst", ARM_MB::NSHST)
2625 .Case("osh", ARM_MB::OSH)
2626 .Case("oshst", ARM_MB::OSHST)
2630 return MatchOperand_NoMatch;
2632 Parser.Lex(); // Eat identifier token.
2633 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
2634 return MatchOperand_Success;
2637 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
2638 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2639 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2640 SMLoc S = Parser.getTok().getLoc();
2641 const AsmToken &Tok = Parser.getTok();
2642 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2643 StringRef IFlagsStr = Tok.getString();
2645 // An iflags string of "none" is interpreted to mean that none of the AIF
2646 // bits are set. Not a terribly useful instruction, but a valid encoding.
2647 unsigned IFlags = 0;
2648 if (IFlagsStr != "none") {
2649 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
2650 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
2651 .Case("a", ARM_PROC::A)
2652 .Case("i", ARM_PROC::I)
2653 .Case("f", ARM_PROC::F)
2656 // If some specific iflag is already set, it means that some letter is
2657 // present more than once, this is not acceptable.
2658 if (Flag == ~0U || (IFlags & Flag))
2659 return MatchOperand_NoMatch;
2665 Parser.Lex(); // Eat identifier token.
2666 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
2667 return MatchOperand_Success;
2670 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
2671 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2672 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2673 SMLoc S = Parser.getTok().getLoc();
2674 const AsmToken &Tok = Parser.getTok();
2675 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2676 StringRef Mask = Tok.getString();
2679 // See ARMv6-M 10.1.1
2680 unsigned FlagsVal = StringSwitch<unsigned>(Mask)
2690 .Case("primask", 16)
2691 .Case("basepri", 17)
2692 .Case("basepri_max", 18)
2693 .Case("faultmask", 19)
2694 .Case("control", 20)
2697 if (FlagsVal == ~0U)
2698 return MatchOperand_NoMatch;
2700 if (!hasV7Ops() && FlagsVal >= 17 && FlagsVal <= 19)
2701 // basepri, basepri_max and faultmask only valid for V7m.
2702 return MatchOperand_NoMatch;
2704 Parser.Lex(); // Eat identifier token.
2705 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2706 return MatchOperand_Success;
2709 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
2710 size_t Start = 0, Next = Mask.find('_');
2711 StringRef Flags = "";
2712 std::string SpecReg = Mask.slice(Start, Next).lower();
2713 if (Next != StringRef::npos)
2714 Flags = Mask.slice(Next+1, Mask.size());
2716 // FlagsVal contains the complete mask:
2718 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2719 unsigned FlagsVal = 0;
2721 if (SpecReg == "apsr") {
2722 FlagsVal = StringSwitch<unsigned>(Flags)
2723 .Case("nzcvq", 0x8) // same as CPSR_f
2724 .Case("g", 0x4) // same as CPSR_s
2725 .Case("nzcvqg", 0xc) // same as CPSR_fs
2728 if (FlagsVal == ~0U) {
2730 return MatchOperand_NoMatch;
2732 FlagsVal = 8; // No flag
2734 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
2735 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
2737 for (int i = 0, e = Flags.size(); i != e; ++i) {
2738 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
2745 // If some specific flag is already set, it means that some letter is
2746 // present more than once, this is not acceptable.
2747 if (FlagsVal == ~0U || (FlagsVal & Flag))
2748 return MatchOperand_NoMatch;
2751 } else // No match for special register.
2752 return MatchOperand_NoMatch;
2754 // Special register without flags is NOT equivalent to "fc" flags.
2755 // NOTE: This is a divergence from gas' behavior. Uncommenting the following
2756 // two lines would enable gas compatibility at the expense of breaking
2762 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2763 if (SpecReg == "spsr")
2766 Parser.Lex(); // Eat identifier token.
2767 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2768 return MatchOperand_Success;
2771 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2772 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
2773 int Low, int High) {
2774 const AsmToken &Tok = Parser.getTok();
2775 if (Tok.isNot(AsmToken::Identifier)) {
2776 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2777 return MatchOperand_ParseFail;
2779 StringRef ShiftName = Tok.getString();
2780 std::string LowerOp = Op.lower();
2781 std::string UpperOp = Op.upper();
2782 if (ShiftName != LowerOp && ShiftName != UpperOp) {
2783 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2784 return MatchOperand_ParseFail;
2786 Parser.Lex(); // Eat shift type token.
2788 // There must be a '#' and a shift amount.
2789 if (Parser.getTok().isNot(AsmToken::Hash)) {
2790 Error(Parser.getTok().getLoc(), "'#' expected");
2791 return MatchOperand_ParseFail;
2793 Parser.Lex(); // Eat hash token.
2795 const MCExpr *ShiftAmount;
2796 SMLoc Loc = Parser.getTok().getLoc();
2797 if (getParser().ParseExpression(ShiftAmount)) {
2798 Error(Loc, "illegal expression");
2799 return MatchOperand_ParseFail;
2801 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2803 Error(Loc, "constant expression expected");
2804 return MatchOperand_ParseFail;
2806 int Val = CE->getValue();
2807 if (Val < Low || Val > High) {
2808 Error(Loc, "immediate value out of range");
2809 return MatchOperand_ParseFail;
2812 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
2814 return MatchOperand_Success;
2817 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2818 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2819 const AsmToken &Tok = Parser.getTok();
2820 SMLoc S = Tok.getLoc();
2821 if (Tok.isNot(AsmToken::Identifier)) {
2822 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2823 return MatchOperand_ParseFail;
2825 int Val = StringSwitch<int>(Tok.getString())
2829 Parser.Lex(); // Eat the token.
2832 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2833 return MatchOperand_ParseFail;
2835 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
2837 S, Parser.getTok().getLoc()));
2838 return MatchOperand_Success;
2841 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
2842 /// instructions. Legal values are:
2843 /// lsl #n 'n' in [0,31]
2844 /// asr #n 'n' in [1,32]
2845 /// n == 32 encoded as n == 0.
2846 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2847 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2848 const AsmToken &Tok = Parser.getTok();
2849 SMLoc S = Tok.getLoc();
2850 if (Tok.isNot(AsmToken::Identifier)) {
2851 Error(S, "shift operator 'asr' or 'lsl' expected");
2852 return MatchOperand_ParseFail;
2854 StringRef ShiftName = Tok.getString();
2856 if (ShiftName == "lsl" || ShiftName == "LSL")
2858 else if (ShiftName == "asr" || ShiftName == "ASR")
2861 Error(S, "shift operator 'asr' or 'lsl' expected");
2862 return MatchOperand_ParseFail;
2864 Parser.Lex(); // Eat the operator.
2866 // A '#' and a shift amount.
2867 if (Parser.getTok().isNot(AsmToken::Hash)) {
2868 Error(Parser.getTok().getLoc(), "'#' expected");
2869 return MatchOperand_ParseFail;
2871 Parser.Lex(); // Eat hash token.
2873 const MCExpr *ShiftAmount;
2874 SMLoc E = Parser.getTok().getLoc();
2875 if (getParser().ParseExpression(ShiftAmount)) {
2876 Error(E, "malformed shift expression");
2877 return MatchOperand_ParseFail;
2879 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2881 Error(E, "shift amount must be an immediate");
2882 return MatchOperand_ParseFail;
2885 int64_t Val = CE->getValue();
2887 // Shift amount must be in [1,32]
2888 if (Val < 1 || Val > 32) {
2889 Error(E, "'asr' shift amount must be in range [1,32]");
2890 return MatchOperand_ParseFail;
2892 // asr #32 encoded as asr #0, but is not allowed in Thumb2 mode.
2893 if (isThumb() && Val == 32) {
2894 Error(E, "'asr #32' shift amount not allowed in Thumb mode");
2895 return MatchOperand_ParseFail;
2897 if (Val == 32) Val = 0;
2899 // Shift amount must be in [1,32]
2900 if (Val < 0 || Val > 31) {
2901 Error(E, "'lsr' shift amount must be in range [0,31]");
2902 return MatchOperand_ParseFail;
2906 E = Parser.getTok().getLoc();
2907 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2909 return MatchOperand_Success;
2912 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2913 /// of instructions. Legal values are:
2914 /// ror #n 'n' in {0, 8, 16, 24}
2915 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2916 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2917 const AsmToken &Tok = Parser.getTok();
2918 SMLoc S = Tok.getLoc();
2919 if (Tok.isNot(AsmToken::Identifier))
2920 return MatchOperand_NoMatch;
2921 StringRef ShiftName = Tok.getString();
2922 if (ShiftName != "ror" && ShiftName != "ROR")
2923 return MatchOperand_NoMatch;
2924 Parser.Lex(); // Eat the operator.
2926 // A '#' and a rotate amount.
2927 if (Parser.getTok().isNot(AsmToken::Hash)) {
2928 Error(Parser.getTok().getLoc(), "'#' expected");
2929 return MatchOperand_ParseFail;
2931 Parser.Lex(); // Eat hash token.
2933 const MCExpr *ShiftAmount;
2934 SMLoc E = Parser.getTok().getLoc();
2935 if (getParser().ParseExpression(ShiftAmount)) {
2936 Error(E, "malformed rotate expression");
2937 return MatchOperand_ParseFail;
2939 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2941 Error(E, "rotate amount must be an immediate");
2942 return MatchOperand_ParseFail;
2945 int64_t Val = CE->getValue();
2946 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2947 // normally, zero is represented in asm by omitting the rotate operand
2949 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2950 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2951 return MatchOperand_ParseFail;
2954 E = Parser.getTok().getLoc();
2955 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2957 return MatchOperand_Success;
2960 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2961 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2962 SMLoc S = Parser.getTok().getLoc();
2963 // The bitfield descriptor is really two operands, the LSB and the width.
2964 if (Parser.getTok().isNot(AsmToken::Hash)) {
2965 Error(Parser.getTok().getLoc(), "'#' expected");
2966 return MatchOperand_ParseFail;
2968 Parser.Lex(); // Eat hash token.
2970 const MCExpr *LSBExpr;
2971 SMLoc E = Parser.getTok().getLoc();
2972 if (getParser().ParseExpression(LSBExpr)) {
2973 Error(E, "malformed immediate expression");
2974 return MatchOperand_ParseFail;
2976 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2978 Error(E, "'lsb' operand must be an immediate");
2979 return MatchOperand_ParseFail;
2982 int64_t LSB = CE->getValue();
2983 // The LSB must be in the range [0,31]
2984 if (LSB < 0 || LSB > 31) {
2985 Error(E, "'lsb' operand must be in the range [0,31]");
2986 return MatchOperand_ParseFail;
2988 E = Parser.getTok().getLoc();
2990 // Expect another immediate operand.
2991 if (Parser.getTok().isNot(AsmToken::Comma)) {
2992 Error(Parser.getTok().getLoc(), "too few operands");
2993 return MatchOperand_ParseFail;
2995 Parser.Lex(); // Eat hash token.
2996 if (Parser.getTok().isNot(AsmToken::Hash)) {
2997 Error(Parser.getTok().getLoc(), "'#' expected");
2998 return MatchOperand_ParseFail;
3000 Parser.Lex(); // Eat hash token.
3002 const MCExpr *WidthExpr;
3003 if (getParser().ParseExpression(WidthExpr)) {
3004 Error(E, "malformed immediate expression");
3005 return MatchOperand_ParseFail;
3007 CE = dyn_cast<MCConstantExpr>(WidthExpr);
3009 Error(E, "'width' operand must be an immediate");
3010 return MatchOperand_ParseFail;
3013 int64_t Width = CE->getValue();
3014 // The LSB must be in the range [1,32-lsb]
3015 if (Width < 1 || Width > 32 - LSB) {
3016 Error(E, "'width' operand must be in the range [1,32-lsb]");
3017 return MatchOperand_ParseFail;
3019 E = Parser.getTok().getLoc();
3021 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
3023 return MatchOperand_Success;
3026 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
3027 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3028 // Check for a post-index addressing register operand. Specifically:
3029 // postidx_reg := '+' register {, shift}
3030 // | '-' register {, shift}
3031 // | register {, shift}
3033 // This method must return MatchOperand_NoMatch without consuming any tokens
3034 // in the case where there is no match, as other alternatives take other
3036 AsmToken Tok = Parser.getTok();
3037 SMLoc S = Tok.getLoc();
3038 bool haveEaten = false;
3041 if (Tok.is(AsmToken::Plus)) {
3042 Parser.Lex(); // Eat the '+' token.
3044 } else if (Tok.is(AsmToken::Minus)) {
3045 Parser.Lex(); // Eat the '-' token.
3049 if (Parser.getTok().is(AsmToken::Identifier))
3050 Reg = tryParseRegister();
3053 return MatchOperand_NoMatch;
3054 Error(Parser.getTok().getLoc(), "register expected");
3055 return MatchOperand_ParseFail;
3057 SMLoc E = Parser.getTok().getLoc();
3059 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
3060 unsigned ShiftImm = 0;
3061 if (Parser.getTok().is(AsmToken::Comma)) {
3062 Parser.Lex(); // Eat the ','.
3063 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
3064 return MatchOperand_ParseFail;
3067 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
3070 return MatchOperand_Success;
3073 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
3074 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3075 // Check for a post-index addressing register operand. Specifically:
3076 // am3offset := '+' register
3083 // This method must return MatchOperand_NoMatch without consuming any tokens
3084 // in the case where there is no match, as other alternatives take other
3086 AsmToken Tok = Parser.getTok();
3087 SMLoc S = Tok.getLoc();
3089 // Do immediates first, as we always parse those if we have a '#'.
3090 if (Parser.getTok().is(AsmToken::Hash)) {
3091 Parser.Lex(); // Eat the '#'.
3092 // Explicitly look for a '-', as we need to encode negative zero
3094 bool isNegative = Parser.getTok().is(AsmToken::Minus);
3095 const MCExpr *Offset;
3096 if (getParser().ParseExpression(Offset))
3097 return MatchOperand_ParseFail;
3098 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
3100 Error(S, "constant expression expected");
3101 return MatchOperand_ParseFail;
3103 SMLoc E = Tok.getLoc();
3104 // Negative zero is encoded as the flag value INT32_MIN.
3105 int32_t Val = CE->getValue();
3106 if (isNegative && Val == 0)
3110 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
3112 return MatchOperand_Success;
3116 bool haveEaten = false;
3119 if (Tok.is(AsmToken::Plus)) {
3120 Parser.Lex(); // Eat the '+' token.
3122 } else if (Tok.is(AsmToken::Minus)) {
3123 Parser.Lex(); // Eat the '-' token.
3127 if (Parser.getTok().is(AsmToken::Identifier))
3128 Reg = tryParseRegister();
3131 return MatchOperand_NoMatch;
3132 Error(Parser.getTok().getLoc(), "register expected");
3133 return MatchOperand_ParseFail;
3135 SMLoc E = Parser.getTok().getLoc();
3137 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
3140 return MatchOperand_Success;
3143 /// cvtT2LdrdPre - Convert parsed operands to MCInst.
3144 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3145 /// when they refer multiple MIOperands inside a single one.
3147 cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
3148 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3150 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3151 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3152 // Create a writeback register dummy placeholder.
3153 Inst.addOperand(MCOperand::CreateReg(0));
3155 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
3157 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3161 /// cvtT2StrdPre - Convert parsed operands to MCInst.
3162 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3163 /// when they refer multiple MIOperands inside a single one.
3165 cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
3166 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3167 // Create a writeback register dummy placeholder.
3168 Inst.addOperand(MCOperand::CreateReg(0));
3170 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3171 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3173 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
3175 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3179 /// cvtLdWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
3180 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3181 /// when they refer multiple MIOperands inside a single one.
3183 cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
3184 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3185 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3187 // Create a writeback register dummy placeholder.
3188 Inst.addOperand(MCOperand::CreateImm(0));
3190 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
3191 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3195 /// cvtStWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
3196 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3197 /// when they refer multiple MIOperands inside a single one.
3199 cvtStWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
3200 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3201 // Create a writeback register dummy placeholder.
3202 Inst.addOperand(MCOperand::CreateImm(0));
3203 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3204 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
3205 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3209 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
3210 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3211 /// when they refer multiple MIOperands inside a single one.
3213 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
3214 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3215 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3217 // Create a writeback register dummy placeholder.
3218 Inst.addOperand(MCOperand::CreateImm(0));
3220 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
3221 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3225 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
3226 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3227 /// when they refer multiple MIOperands inside a single one.
3229 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
3230 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3231 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3233 // Create a writeback register dummy placeholder.
3234 Inst.addOperand(MCOperand::CreateImm(0));
3236 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
3237 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3242 /// cvtStWriteBackRegAddrModeImm12 - 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 cvtStWriteBackRegAddrModeImm12(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])->addMemImm12OffsetOperands(Inst, 2);
3252 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3256 /// cvtStWriteBackRegAddrMode2 - 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 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
3261 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3262 // Create a writeback register dummy placeholder.
3263 Inst.addOperand(MCOperand::CreateImm(0));
3264 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3265 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
3266 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3270 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
3271 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3272 /// when they refer multiple MIOperands inside a single one.
3274 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
3275 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3276 // Create a writeback register dummy placeholder.
3277 Inst.addOperand(MCOperand::CreateImm(0));
3278 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3279 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
3280 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3284 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
3285 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3286 /// when they refer multiple MIOperands inside a single one.
3288 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
3289 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3291 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3292 // Create a writeback register dummy placeholder.
3293 Inst.addOperand(MCOperand::CreateImm(0));
3295 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3297 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
3299 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3303 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
3304 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3305 /// when they refer multiple MIOperands inside a single one.
3307 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
3308 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3310 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3311 // Create a writeback register dummy placeholder.
3312 Inst.addOperand(MCOperand::CreateImm(0));
3314 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3316 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
3318 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3322 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
3323 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3324 /// when they refer multiple MIOperands inside a single one.
3326 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
3327 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3328 // Create a writeback register dummy placeholder.
3329 Inst.addOperand(MCOperand::CreateImm(0));
3331 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3333 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3335 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
3337 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3341 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
3342 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3343 /// when they refer multiple MIOperands inside a single one.
3345 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
3346 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3347 // Create a writeback register dummy placeholder.
3348 Inst.addOperand(MCOperand::CreateImm(0));
3350 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3352 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3354 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
3356 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3360 /// cvtLdrdPre - Convert parsed operands to MCInst.
3361 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3362 /// when they refer multiple MIOperands inside a single one.
3364 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
3365 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3367 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3368 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3369 // Create a writeback register dummy placeholder.
3370 Inst.addOperand(MCOperand::CreateImm(0));
3372 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3374 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3378 /// cvtStrdPre - Convert parsed operands to MCInst.
3379 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3380 /// when they refer multiple MIOperands inside a single one.
3382 cvtStrdPre(MCInst &Inst, unsigned Opcode,
3383 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3384 // Create a writeback register dummy placeholder.
3385 Inst.addOperand(MCOperand::CreateImm(0));
3387 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3388 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3390 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3392 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3396 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
3397 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3398 /// when they refer multiple MIOperands inside a single one.
3400 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
3401 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3402 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3403 // Create a writeback register dummy placeholder.
3404 Inst.addOperand(MCOperand::CreateImm(0));
3405 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
3406 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3410 /// cvtThumbMultiple- Convert parsed operands to MCInst.
3411 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3412 /// when they refer multiple MIOperands inside a single one.
3414 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
3415 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3416 // The second source operand must be the same register as the destination
3418 if (Operands.size() == 6 &&
3419 (((ARMOperand*)Operands[3])->getReg() !=
3420 ((ARMOperand*)Operands[5])->getReg()) &&
3421 (((ARMOperand*)Operands[3])->getReg() !=
3422 ((ARMOperand*)Operands[4])->getReg())) {
3423 Error(Operands[3]->getStartLoc(),
3424 "destination register must match source register");
3427 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3428 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
3429 // If we have a three-operand form, make sure to set Rn to be the operand
3430 // that isn't the same as Rd.
3432 if (Operands.size() == 6 &&
3433 ((ARMOperand*)Operands[4])->getReg() ==
3434 ((ARMOperand*)Operands[3])->getReg())
3436 ((ARMOperand*)Operands[RegOp])->addRegOperands(Inst, 1);
3437 Inst.addOperand(Inst.getOperand(0));
3438 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
3444 cvtVLDwbFixed(MCInst &Inst, unsigned Opcode,
3445 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3447 ((ARMOperand*)Operands[3])->addVecListTwoDOperands(Inst, 1);
3448 // Create a writeback register dummy placeholder.
3449 Inst.addOperand(MCOperand::CreateImm(0));
3451 ((ARMOperand*)Operands[4])->addAlignedMemoryOperands(Inst, 2);
3453 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3458 cvtVLDwbRegister(MCInst &Inst, unsigned Opcode,
3459 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3461 ((ARMOperand*)Operands[3])->addVecListTwoDOperands(Inst, 1);
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[1])->addCondCodeOperands(Inst, 2);
3474 cvtVSTwbFixed(MCInst &Inst, unsigned Opcode,
3475 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3476 // Create a writeback register dummy placeholder.
3477 Inst.addOperand(MCOperand::CreateImm(0));
3479 ((ARMOperand*)Operands[4])->addAlignedMemoryOperands(Inst, 2);
3481 ((ARMOperand*)Operands[3])->addVecListTwoDOperands(Inst, 1);
3483 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3488 cvtVSTwbRegister(MCInst &Inst, unsigned Opcode,
3489 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3490 // Create a writeback register dummy placeholder.
3491 Inst.addOperand(MCOperand::CreateImm(0));
3493 ((ARMOperand*)Operands[4])->addAlignedMemoryOperands(Inst, 2);
3495 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
3497 ((ARMOperand*)Operands[3])->addVecListTwoDOperands(Inst, 1);
3499 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3503 /// Parse an ARM memory expression, return false if successful else return true
3504 /// or an error. The first token must be a '[' when called.
3506 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3508 assert(Parser.getTok().is(AsmToken::LBrac) &&
3509 "Token is not a Left Bracket");
3510 S = Parser.getTok().getLoc();
3511 Parser.Lex(); // Eat left bracket token.
3513 const AsmToken &BaseRegTok = Parser.getTok();
3514 int BaseRegNum = tryParseRegister();
3515 if (BaseRegNum == -1)
3516 return Error(BaseRegTok.getLoc(), "register expected");
3518 // The next token must either be a comma or a closing bracket.
3519 const AsmToken &Tok = Parser.getTok();
3520 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
3521 return Error(Tok.getLoc(), "malformed memory operand");
3523 if (Tok.is(AsmToken::RBrac)) {
3525 Parser.Lex(); // Eat right bracket token.
3527 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
3528 0, 0, false, S, E));
3530 // If there's a pre-indexing writeback marker, '!', just add it as a token
3531 // operand. It's rather odd, but syntactically valid.
3532 if (Parser.getTok().is(AsmToken::Exclaim)) {
3533 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3534 Parser.Lex(); // Eat the '!'.
3540 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
3541 Parser.Lex(); // Eat the comma.
3543 // If we have a ':', it's an alignment specifier.
3544 if (Parser.getTok().is(AsmToken::Colon)) {
3545 Parser.Lex(); // Eat the ':'.
3546 E = Parser.getTok().getLoc();
3549 if (getParser().ParseExpression(Expr))
3552 // The expression has to be a constant. Memory references with relocations
3553 // don't come through here, as they use the <label> forms of the relevant
3555 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3557 return Error (E, "constant expression expected");
3560 switch (CE->getValue()) {
3562 return Error(E, "alignment specifier must be 64, 128, or 256 bits");
3563 case 64: Align = 8; break;
3564 case 128: Align = 16; break;
3565 case 256: Align = 32; break;
3568 // Now we should have the closing ']'
3569 E = Parser.getTok().getLoc();
3570 if (Parser.getTok().isNot(AsmToken::RBrac))
3571 return Error(E, "']' expected");
3572 Parser.Lex(); // Eat right bracket token.
3574 // Don't worry about range checking the value here. That's handled by
3575 // the is*() predicates.
3576 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0,
3577 ARM_AM::no_shift, 0, Align,
3580 // If there's a pre-indexing writeback marker, '!', just add it as a token
3582 if (Parser.getTok().is(AsmToken::Exclaim)) {
3583 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3584 Parser.Lex(); // Eat the '!'.
3590 // If we have a '#', it's an immediate offset, else assume it's a register
3591 // offset. Be friendly and also accept a plain integer (without a leading
3592 // hash) for gas compatibility.
3593 if (Parser.getTok().is(AsmToken::Hash) ||
3594 Parser.getTok().is(AsmToken::Integer)) {
3595 if (Parser.getTok().is(AsmToken::Hash))
3596 Parser.Lex(); // Eat the '#'.
3597 E = Parser.getTok().getLoc();
3599 bool isNegative = getParser().getTok().is(AsmToken::Minus);
3600 const MCExpr *Offset;
3601 if (getParser().ParseExpression(Offset))
3604 // The expression has to be a constant. Memory references with relocations
3605 // don't come through here, as they use the <label> forms of the relevant
3607 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
3609 return Error (E, "constant expression expected");
3611 // If the constant was #-0, represent it as INT32_MIN.
3612 int32_t Val = CE->getValue();
3613 if (isNegative && Val == 0)
3614 CE = MCConstantExpr::Create(INT32_MIN, getContext());
3616 // Now we should have the closing ']'
3617 E = Parser.getTok().getLoc();
3618 if (Parser.getTok().isNot(AsmToken::RBrac))
3619 return Error(E, "']' expected");
3620 Parser.Lex(); // Eat right bracket token.
3622 // Don't worry about range checking the value here. That's handled by
3623 // the is*() predicates.
3624 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
3625 ARM_AM::no_shift, 0, 0,
3628 // If there's a pre-indexing writeback marker, '!', just add it as a token
3630 if (Parser.getTok().is(AsmToken::Exclaim)) {
3631 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3632 Parser.Lex(); // Eat the '!'.
3638 // The register offset is optionally preceded by a '+' or '-'
3639 bool isNegative = false;
3640 if (Parser.getTok().is(AsmToken::Minus)) {
3642 Parser.Lex(); // Eat the '-'.
3643 } else if (Parser.getTok().is(AsmToken::Plus)) {
3645 Parser.Lex(); // Eat the '+'.
3648 E = Parser.getTok().getLoc();
3649 int OffsetRegNum = tryParseRegister();
3650 if (OffsetRegNum == -1)
3651 return Error(E, "register expected");
3653 // If there's a shift operator, handle it.
3654 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
3655 unsigned ShiftImm = 0;
3656 if (Parser.getTok().is(AsmToken::Comma)) {
3657 Parser.Lex(); // Eat the ','.
3658 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
3662 // Now we should have the closing ']'
3663 E = Parser.getTok().getLoc();
3664 if (Parser.getTok().isNot(AsmToken::RBrac))
3665 return Error(E, "']' expected");
3666 Parser.Lex(); // Eat right bracket token.
3668 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
3669 ShiftType, ShiftImm, 0, isNegative,
3672 // If there's a pre-indexing writeback marker, '!', just add it as a token
3674 if (Parser.getTok().is(AsmToken::Exclaim)) {
3675 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3676 Parser.Lex(); // Eat the '!'.
3682 /// parseMemRegOffsetShift - one of these two:
3683 /// ( lsl | lsr | asr | ror ) , # shift_amount
3685 /// return true if it parses a shift otherwise it returns false.
3686 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
3688 SMLoc Loc = Parser.getTok().getLoc();
3689 const AsmToken &Tok = Parser.getTok();
3690 if (Tok.isNot(AsmToken::Identifier))
3692 StringRef ShiftName = Tok.getString();
3693 if (ShiftName == "lsl" || ShiftName == "LSL")
3695 else if (ShiftName == "lsr" || ShiftName == "LSR")
3697 else if (ShiftName == "asr" || ShiftName == "ASR")
3699 else if (ShiftName == "ror" || ShiftName == "ROR")
3701 else if (ShiftName == "rrx" || ShiftName == "RRX")
3704 return Error(Loc, "illegal shift operator");
3705 Parser.Lex(); // Eat shift type token.
3707 // rrx stands alone.
3709 if (St != ARM_AM::rrx) {
3710 Loc = Parser.getTok().getLoc();
3711 // A '#' and a shift amount.
3712 const AsmToken &HashTok = Parser.getTok();
3713 if (HashTok.isNot(AsmToken::Hash))
3714 return Error(HashTok.getLoc(), "'#' expected");
3715 Parser.Lex(); // Eat hash token.
3718 if (getParser().ParseExpression(Expr))
3720 // Range check the immediate.
3721 // lsl, ror: 0 <= imm <= 31
3722 // lsr, asr: 0 <= imm <= 32
3723 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3725 return Error(Loc, "shift amount must be an immediate");
3726 int64_t Imm = CE->getValue();
3728 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
3729 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
3730 return Error(Loc, "immediate shift value out of range");
3737 /// parseFPImm - A floating point immediate expression operand.
3738 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
3739 parseFPImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3740 SMLoc S = Parser.getTok().getLoc();
3742 if (Parser.getTok().isNot(AsmToken::Hash))
3743 return MatchOperand_NoMatch;
3745 // Disambiguate the VMOV forms that can accept an FP immediate.
3746 // vmov.f32 <sreg>, #imm
3747 // vmov.f64 <dreg>, #imm
3748 // vmov.f32 <dreg>, #imm @ vector f32x2
3749 // vmov.f32 <qreg>, #imm @ vector f32x4
3751 // There are also the NEON VMOV instructions which expect an
3752 // integer constant. Make sure we don't try to parse an FPImm
3754 // vmov.i{8|16|32|64} <dreg|qreg>, #imm
3755 ARMOperand *TyOp = static_cast<ARMOperand*>(Operands[2]);
3756 if (!TyOp->isToken() || (TyOp->getToken() != ".f32" &&
3757 TyOp->getToken() != ".f64"))
3758 return MatchOperand_NoMatch;
3760 Parser.Lex(); // Eat the '#'.
3762 // Handle negation, as that still comes through as a separate token.
3763 bool isNegative = false;
3764 if (Parser.getTok().is(AsmToken::Minus)) {
3768 const AsmToken &Tok = Parser.getTok();
3769 if (Tok.is(AsmToken::Real)) {
3770 APFloat RealVal(APFloat::IEEEdouble, Tok.getString());
3771 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
3772 // If we had a '-' in front, toggle the sign bit.
3773 IntVal ^= (uint64_t)isNegative << 63;
3774 int Val = ARM_AM::getFP64Imm(APInt(64, IntVal));
3775 Parser.Lex(); // Eat the token.
3777 TokError("floating point value out of range");
3778 return MatchOperand_ParseFail;
3780 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3781 return MatchOperand_Success;
3783 if (Tok.is(AsmToken::Integer)) {
3784 int64_t Val = Tok.getIntVal();
3785 Parser.Lex(); // Eat the token.
3786 if (Val > 255 || Val < 0) {
3787 TokError("encoded floating point value out of range");
3788 return MatchOperand_ParseFail;
3790 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3791 return MatchOperand_Success;
3794 TokError("invalid floating point immediate");
3795 return MatchOperand_ParseFail;
3797 /// Parse a arm instruction operand. For now this parses the operand regardless
3798 /// of the mnemonic.
3799 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3800 StringRef Mnemonic) {
3803 // Check if the current operand has a custom associated parser, if so, try to
3804 // custom parse the operand, or fallback to the general approach.
3805 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
3806 if (ResTy == MatchOperand_Success)
3808 // If there wasn't a custom match, try the generic matcher below. Otherwise,
3809 // there was a match, but an error occurred, in which case, just return that
3810 // the operand parsing failed.
3811 if (ResTy == MatchOperand_ParseFail)
3814 switch (getLexer().getKind()) {
3816 Error(Parser.getTok().getLoc(), "unexpected token in operand");
3818 case AsmToken::Identifier: {
3819 // If this is VMRS, check for the apsr_nzcv operand.
3820 if (!tryParseRegisterWithWriteBack(Operands))
3822 int Res = tryParseShiftRegister(Operands);
3823 if (Res == 0) // success
3825 else if (Res == -1) // irrecoverable error
3827 if (Mnemonic == "vmrs" && Parser.getTok().getString() == "apsr_nzcv") {
3828 S = Parser.getTok().getLoc();
3830 Operands.push_back(ARMOperand::CreateToken("apsr_nzcv", S));
3834 // Fall though for the Identifier case that is not a register or a
3837 case AsmToken::LParen: // parenthesized expressions like (_strcmp-4)
3838 case AsmToken::Integer: // things like 1f and 2b as a branch targets
3839 case AsmToken::String: // quoted label names.
3840 case AsmToken::Dot: { // . as a branch target
3841 // This was not a register so parse other operands that start with an
3842 // identifier (like labels) as expressions and create them as immediates.
3843 const MCExpr *IdVal;
3844 S = Parser.getTok().getLoc();
3845 if (getParser().ParseExpression(IdVal))
3847 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3848 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
3851 case AsmToken::LBrac:
3852 return parseMemory(Operands);
3853 case AsmToken::LCurly:
3854 return parseRegisterList(Operands);
3855 case AsmToken::Hash: {
3856 // #42 -> immediate.
3857 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
3858 S = Parser.getTok().getLoc();
3860 bool isNegative = Parser.getTok().is(AsmToken::Minus);
3861 const MCExpr *ImmVal;
3862 if (getParser().ParseExpression(ImmVal))
3864 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ImmVal);
3866 int32_t Val = CE->getValue();
3867 if (isNegative && Val == 0)
3868 ImmVal = MCConstantExpr::Create(INT32_MIN, getContext());
3870 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3871 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
3874 case AsmToken::Colon: {
3875 // ":lower16:" and ":upper16:" expression prefixes
3876 // FIXME: Check it's an expression prefix,
3877 // e.g. (FOO - :lower16:BAR) isn't legal.
3878 ARMMCExpr::VariantKind RefKind;
3879 if (parsePrefix(RefKind))
3882 const MCExpr *SubExprVal;
3883 if (getParser().ParseExpression(SubExprVal))
3886 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
3888 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3889 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
3895 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
3896 // :lower16: and :upper16:.
3897 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
3898 RefKind = ARMMCExpr::VK_ARM_None;
3900 // :lower16: and :upper16: modifiers
3901 assert(getLexer().is(AsmToken::Colon) && "expected a :");
3902 Parser.Lex(); // Eat ':'
3904 if (getLexer().isNot(AsmToken::Identifier)) {
3905 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
3909 StringRef IDVal = Parser.getTok().getIdentifier();
3910 if (IDVal == "lower16") {
3911 RefKind = ARMMCExpr::VK_ARM_LO16;
3912 } else if (IDVal == "upper16") {
3913 RefKind = ARMMCExpr::VK_ARM_HI16;
3915 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
3920 if (getLexer().isNot(AsmToken::Colon)) {
3921 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
3924 Parser.Lex(); // Eat the last ':'
3928 /// \brief Given a mnemonic, split out possible predication code and carry
3929 /// setting letters to form a canonical mnemonic and flags.
3931 // FIXME: Would be nice to autogen this.
3932 // FIXME: This is a bit of a maze of special cases.
3933 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
3934 unsigned &PredicationCode,
3936 unsigned &ProcessorIMod,
3937 StringRef &ITMask) {
3938 PredicationCode = ARMCC::AL;
3939 CarrySetting = false;
3942 // Ignore some mnemonics we know aren't predicated forms.
3944 // FIXME: Would be nice to autogen this.
3945 if ((Mnemonic == "movs" && isThumb()) ||
3946 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
3947 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
3948 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
3949 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
3950 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
3951 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
3952 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
3955 // First, split out any predication code. Ignore mnemonics we know aren't
3956 // predicated but do have a carry-set and so weren't caught above.
3957 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
3958 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
3959 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
3960 Mnemonic != "sbcs" && Mnemonic != "rscs") {
3961 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
3962 .Case("eq", ARMCC::EQ)
3963 .Case("ne", ARMCC::NE)
3964 .Case("hs", ARMCC::HS)
3965 .Case("cs", ARMCC::HS)
3966 .Case("lo", ARMCC::LO)
3967 .Case("cc", ARMCC::LO)
3968 .Case("mi", ARMCC::MI)
3969 .Case("pl", ARMCC::PL)
3970 .Case("vs", ARMCC::VS)
3971 .Case("vc", ARMCC::VC)
3972 .Case("hi", ARMCC::HI)
3973 .Case("ls", ARMCC::LS)
3974 .Case("ge", ARMCC::GE)
3975 .Case("lt", ARMCC::LT)
3976 .Case("gt", ARMCC::GT)
3977 .Case("le", ARMCC::LE)
3978 .Case("al", ARMCC::AL)
3981 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
3982 PredicationCode = CC;
3986 // Next, determine if we have a carry setting bit. We explicitly ignore all
3987 // the instructions we know end in 's'.
3988 if (Mnemonic.endswith("s") &&
3989 !(Mnemonic == "cps" || Mnemonic == "mls" ||
3990 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
3991 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
3992 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
3993 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
3994 (Mnemonic == "movs" && isThumb()))) {
3995 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
3996 CarrySetting = true;
3999 // The "cps" instruction can have a interrupt mode operand which is glued into
4000 // the mnemonic. Check if this is the case, split it and parse the imod op
4001 if (Mnemonic.startswith("cps")) {
4002 // Split out any imod code.
4004 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
4005 .Case("ie", ARM_PROC::IE)
4006 .Case("id", ARM_PROC::ID)
4009 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
4010 ProcessorIMod = IMod;
4014 // The "it" instruction has the condition mask on the end of the mnemonic.
4015 if (Mnemonic.startswith("it")) {
4016 ITMask = Mnemonic.slice(2, Mnemonic.size());
4017 Mnemonic = Mnemonic.slice(0, 2);
4023 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
4024 /// inclusion of carry set or predication code operands.
4026 // FIXME: It would be nice to autogen this.
4028 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
4029 bool &CanAcceptPredicationCode) {
4030 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
4031 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
4032 Mnemonic == "add" || Mnemonic == "adc" ||
4033 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
4034 Mnemonic == "orr" || Mnemonic == "mvn" ||
4035 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
4036 Mnemonic == "sbc" || Mnemonic == "eor" || Mnemonic == "neg" ||
4037 (!isThumb() && (Mnemonic == "smull" || Mnemonic == "mov" ||
4038 Mnemonic == "mla" || Mnemonic == "smlal" ||
4039 Mnemonic == "umlal" || Mnemonic == "umull"))) {
4040 CanAcceptCarrySet = true;
4042 CanAcceptCarrySet = false;
4044 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
4045 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
4046 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
4047 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
4048 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "setend" ||
4049 (Mnemonic == "clrex" && !isThumb()) ||
4050 (Mnemonic == "nop" && isThumbOne()) ||
4051 ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw" ||
4052 Mnemonic == "ldc2" || Mnemonic == "ldc2l" ||
4053 Mnemonic == "stc2" || Mnemonic == "stc2l") && !isThumb()) ||
4054 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs")) &&
4056 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumbOne())) {
4057 CanAcceptPredicationCode = false;
4059 CanAcceptPredicationCode = true;
4062 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
4063 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
4064 CanAcceptPredicationCode = false;
4068 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
4069 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4070 // FIXME: This is all horribly hacky. We really need a better way to deal
4071 // with optional operands like this in the matcher table.
4073 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
4074 // another does not. Specifically, the MOVW instruction does not. So we
4075 // special case it here and remove the defaulted (non-setting) cc_out
4076 // operand if that's the instruction we're trying to match.
4078 // We do this as post-processing of the explicit operands rather than just
4079 // conditionally adding the cc_out in the first place because we need
4080 // to check the type of the parsed immediate operand.
4081 if (Mnemonic == "mov" && Operands.size() > 4 && !isThumb() &&
4082 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
4083 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
4084 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
4087 // Register-register 'add' for thumb does not have a cc_out operand
4088 // when there are only two register operands.
4089 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
4090 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4091 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4092 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
4094 // Register-register 'add' for thumb does not have a cc_out operand
4095 // when it's an ADD Rdm, SP, {Rdm|#imm0_255} instruction. We do
4096 // have to check the immediate range here since Thumb2 has a variant
4097 // that can handle a different range and has a cc_out operand.
4098 if (((isThumb() && Mnemonic == "add") ||
4099 (isThumbTwo() && Mnemonic == "sub")) &&
4100 Operands.size() == 6 &&
4101 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4102 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4103 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
4104 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
4105 (static_cast<ARMOperand*>(Operands[5])->isReg() ||
4106 static_cast<ARMOperand*>(Operands[5])->isImm0_1020s4()))
4108 // For Thumb2, add/sub immediate does not have a cc_out operand for the
4109 // imm0_4095 variant. That's the least-preferred variant when
4110 // selecting via the generic "add" mnemonic, so to know that we
4111 // should remove the cc_out operand, we have to explicitly check that
4112 // it's not one of the other variants. Ugh.
4113 if (isThumbTwo() && (Mnemonic == "add" || Mnemonic == "sub") &&
4114 Operands.size() == 6 &&
4115 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4116 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4117 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4118 // Nest conditions rather than one big 'if' statement for readability.
4120 // If either register is a high reg, it's either one of the SP
4121 // variants (handled above) or a 32-bit encoding, so we just
4122 // check against T3.
4123 if ((!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
4124 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg())) &&
4125 static_cast<ARMOperand*>(Operands[5])->isT2SOImm())
4127 // If both registers are low, we're in an IT block, and the immediate is
4128 // in range, we should use encoding T1 instead, which has a cc_out.
4130 isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) &&
4131 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
4132 static_cast<ARMOperand*>(Operands[5])->isImm0_7())
4135 // Otherwise, we use encoding T4, which does not have a cc_out
4140 // The thumb2 multiply instruction doesn't have a CCOut register, so
4141 // if we have a "mul" mnemonic in Thumb mode, check if we'll be able to
4142 // use the 16-bit encoding or not.
4143 if (isThumbTwo() && Mnemonic == "mul" && Operands.size() == 6 &&
4144 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
4145 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4146 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4147 static_cast<ARMOperand*>(Operands[5])->isReg() &&
4148 // If the registers aren't low regs, the destination reg isn't the
4149 // same as one of the source regs, or the cc_out operand is zero
4150 // outside of an IT block, we have to use the 32-bit encoding, so
4151 // remove the cc_out operand.
4152 (!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
4153 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) ||
4154 !isARMLowRegister(static_cast<ARMOperand*>(Operands[5])->getReg()) ||
4156 (static_cast<ARMOperand*>(Operands[3])->getReg() !=
4157 static_cast<ARMOperand*>(Operands[5])->getReg() &&
4158 static_cast<ARMOperand*>(Operands[3])->getReg() !=
4159 static_cast<ARMOperand*>(Operands[4])->getReg())))
4162 // Also check the 'mul' syntax variant that doesn't specify an explicit
4163 // destination register.
4164 if (isThumbTwo() && Mnemonic == "mul" && Operands.size() == 5 &&
4165 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
4166 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4167 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4168 // If the registers aren't low regs or the cc_out operand is zero
4169 // outside of an IT block, we have to use the 32-bit encoding, so
4170 // remove the cc_out operand.
4171 (!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
4172 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) ||
4178 // Register-register 'add/sub' for thumb does not have a cc_out operand
4179 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
4180 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
4181 // right, this will result in better diagnostics (which operand is off)
4183 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
4184 (Operands.size() == 5 || Operands.size() == 6) &&
4185 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4186 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
4187 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
4193 static bool isDataTypeToken(StringRef Tok) {
4194 return Tok == ".8" || Tok == ".16" || Tok == ".32" || Tok == ".64" ||
4195 Tok == ".i8" || Tok == ".i16" || Tok == ".i32" || Tok == ".i64" ||
4196 Tok == ".u8" || Tok == ".u16" || Tok == ".u32" || Tok == ".u64" ||
4197 Tok == ".s8" || Tok == ".s16" || Tok == ".s32" || Tok == ".s64" ||
4198 Tok == ".p8" || Tok == ".p16" || Tok == ".f32" || Tok == ".f64" ||
4199 Tok == ".f" || Tok == ".d";
4202 // FIXME: This bit should probably be handled via an explicit match class
4203 // in the .td files that matches the suffix instead of having it be
4204 // a literal string token the way it is now.
4205 static bool doesIgnoreDataTypeSuffix(StringRef Mnemonic, StringRef DT) {
4206 return Mnemonic.startswith("vldm") || Mnemonic.startswith("vstm");
4209 /// Parse an arm instruction mnemonic followed by its operands.
4210 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
4211 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4212 // Create the leading tokens for the mnemonic, split by '.' characters.
4213 size_t Start = 0, Next = Name.find('.');
4214 StringRef Mnemonic = Name.slice(Start, Next);
4216 // Split out the predication code and carry setting flag from the mnemonic.
4217 unsigned PredicationCode;
4218 unsigned ProcessorIMod;
4221 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
4222 ProcessorIMod, ITMask);
4224 // In Thumb1, only the branch (B) instruction can be predicated.
4225 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
4226 Parser.EatToEndOfStatement();
4227 return Error(NameLoc, "conditional execution not supported in Thumb1");
4230 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
4232 // Handle the IT instruction ITMask. Convert it to a bitmask. This
4233 // is the mask as it will be for the IT encoding if the conditional
4234 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
4235 // where the conditional bit0 is zero, the instruction post-processing
4236 // will adjust the mask accordingly.
4237 if (Mnemonic == "it") {
4238 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + 2);
4239 if (ITMask.size() > 3) {
4240 Parser.EatToEndOfStatement();
4241 return Error(Loc, "too many conditions on IT instruction");
4244 for (unsigned i = ITMask.size(); i != 0; --i) {
4245 char pos = ITMask[i - 1];
4246 if (pos != 't' && pos != 'e') {
4247 Parser.EatToEndOfStatement();
4248 return Error(Loc, "illegal IT block condition mask '" + ITMask + "'");
4251 if (ITMask[i - 1] == 't')
4254 Operands.push_back(ARMOperand::CreateITMask(Mask, Loc));
4257 // FIXME: This is all a pretty gross hack. We should automatically handle
4258 // optional operands like this via tblgen.
4260 // Next, add the CCOut and ConditionCode operands, if needed.
4262 // For mnemonics which can ever incorporate a carry setting bit or predication
4263 // code, our matching model involves us always generating CCOut and
4264 // ConditionCode operands to match the mnemonic "as written" and then we let
4265 // the matcher deal with finding the right instruction or generating an
4266 // appropriate error.
4267 bool CanAcceptCarrySet, CanAcceptPredicationCode;
4268 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
4270 // If we had a carry-set on an instruction that can't do that, issue an
4272 if (!CanAcceptCarrySet && CarrySetting) {
4273 Parser.EatToEndOfStatement();
4274 return Error(NameLoc, "instruction '" + Mnemonic +
4275 "' can not set flags, but 's' suffix specified");
4277 // If we had a predication code on an instruction that can't do that, issue an
4279 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
4280 Parser.EatToEndOfStatement();
4281 return Error(NameLoc, "instruction '" + Mnemonic +
4282 "' is not predicable, but condition code specified");
4285 // Add the carry setting operand, if necessary.
4286 if (CanAcceptCarrySet) {
4287 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size());
4288 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
4292 // Add the predication code operand, if necessary.
4293 if (CanAcceptPredicationCode) {
4294 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size() +
4296 Operands.push_back(ARMOperand::CreateCondCode(
4297 ARMCC::CondCodes(PredicationCode), Loc));
4300 // Add the processor imod operand, if necessary.
4301 if (ProcessorIMod) {
4302 Operands.push_back(ARMOperand::CreateImm(
4303 MCConstantExpr::Create(ProcessorIMod, getContext()),
4307 // Add the remaining tokens in the mnemonic.
4308 while (Next != StringRef::npos) {
4310 Next = Name.find('.', Start + 1);
4311 StringRef ExtraToken = Name.slice(Start, Next);
4313 // Some NEON instructions have an optional datatype suffix that is
4314 // completely ignored. Check for that.
4315 if (isDataTypeToken(ExtraToken) &&
4316 doesIgnoreDataTypeSuffix(Mnemonic, ExtraToken))
4319 if (ExtraToken != ".n") {
4320 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Start);
4321 Operands.push_back(ARMOperand::CreateToken(ExtraToken, Loc));
4325 // Read the remaining operands.
4326 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4327 // Read the first operand.
4328 if (parseOperand(Operands, Mnemonic)) {
4329 Parser.EatToEndOfStatement();
4333 while (getLexer().is(AsmToken::Comma)) {
4334 Parser.Lex(); // Eat the comma.
4336 // Parse and remember the operand.
4337 if (parseOperand(Operands, Mnemonic)) {
4338 Parser.EatToEndOfStatement();
4344 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4345 SMLoc Loc = getLexer().getLoc();
4346 Parser.EatToEndOfStatement();
4347 return Error(Loc, "unexpected token in argument list");
4350 Parser.Lex(); // Consume the EndOfStatement
4352 // Some instructions, mostly Thumb, have forms for the same mnemonic that
4353 // do and don't have a cc_out optional-def operand. With some spot-checks
4354 // of the operand list, we can figure out which variant we're trying to
4355 // parse and adjust accordingly before actually matching. We shouldn't ever
4356 // try to remove a cc_out operand that was explicitly set on the the
4357 // mnemonic, of course (CarrySetting == true). Reason number #317 the
4358 // table driven matcher doesn't fit well with the ARM instruction set.
4359 if (!CarrySetting && shouldOmitCCOutOperand(Mnemonic, Operands)) {
4360 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
4361 Operands.erase(Operands.begin() + 1);
4365 // ARM mode 'blx' need special handling, as the register operand version
4366 // is predicable, but the label operand version is not. So, we can't rely
4367 // on the Mnemonic based checking to correctly figure out when to put
4368 // a k_CondCode operand in the list. If we're trying to match the label
4369 // version, remove the k_CondCode operand here.
4370 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
4371 static_cast<ARMOperand*>(Operands[2])->isImm()) {
4372 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
4373 Operands.erase(Operands.begin() + 1);
4377 // The vector-compare-to-zero instructions have a literal token "#0" at
4378 // the end that comes to here as an immediate operand. Convert it to a
4379 // token to play nicely with the matcher.
4380 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
4381 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
4382 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4383 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
4384 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4385 if (CE && CE->getValue() == 0) {
4386 Operands.erase(Operands.begin() + 5);
4387 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4391 // VCMP{E} does the same thing, but with a different operand count.
4392 if ((Mnemonic == "vcmp" || Mnemonic == "vcmpe") && Operands.size() == 5 &&
4393 static_cast<ARMOperand*>(Operands[4])->isImm()) {
4394 ARMOperand *Op = static_cast<ARMOperand*>(Operands[4]);
4395 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4396 if (CE && CE->getValue() == 0) {
4397 Operands.erase(Operands.begin() + 4);
4398 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4402 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
4403 // end. Convert it to a token here.
4404 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
4405 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4406 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
4407 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4408 if (CE && CE->getValue() == 0) {
4409 Operands.erase(Operands.begin() + 5);
4410 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4418 // Validate context-sensitive operand constraints.
4420 // return 'true' if register list contains non-low GPR registers,
4421 // 'false' otherwise. If Reg is in the register list or is HiReg, set
4422 // 'containsReg' to true.
4423 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
4424 unsigned HiReg, bool &containsReg) {
4425 containsReg = false;
4426 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4427 unsigned OpReg = Inst.getOperand(i).getReg();
4430 // Anything other than a low register isn't legal here.
4431 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
4437 // Check if the specified regisgter is in the register list of the inst,
4438 // starting at the indicated operand number.
4439 static bool listContainsReg(MCInst &Inst, unsigned OpNo, unsigned Reg) {
4440 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4441 unsigned OpReg = Inst.getOperand(i).getReg();
4448 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
4449 // the ARMInsts array) instead. Getting that here requires awkward
4450 // API changes, though. Better way?
4452 extern const MCInstrDesc ARMInsts[];
4454 static const MCInstrDesc &getInstDesc(unsigned Opcode) {
4455 return ARMInsts[Opcode];
4458 // FIXME: We would really like to be able to tablegen'erate this.
4460 validateInstruction(MCInst &Inst,
4461 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4462 const MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
4463 SMLoc Loc = Operands[0]->getStartLoc();
4464 // Check the IT block state first.
4465 // NOTE: In Thumb mode, the BKPT instruction has the interesting property of
4466 // being allowed in IT blocks, but not being predicable. It just always
4468 if (inITBlock() && Inst.getOpcode() != ARM::tBKPT) {
4470 if (ITState.FirstCond)
4471 ITState.FirstCond = false;
4473 bit = (ITState.Mask >> (5 - ITState.CurPosition)) & 1;
4474 // The instruction must be predicable.
4475 if (!MCID.isPredicable())
4476 return Error(Loc, "instructions in IT block must be predicable");
4477 unsigned Cond = Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm();
4478 unsigned ITCond = bit ? ITState.Cond :
4479 ARMCC::getOppositeCondition(ITState.Cond);
4480 if (Cond != ITCond) {
4481 // Find the condition code Operand to get its SMLoc information.
4483 for (unsigned i = 1; i < Operands.size(); ++i)
4484 if (static_cast<ARMOperand*>(Operands[i])->isCondCode())
4485 CondLoc = Operands[i]->getStartLoc();
4486 return Error(CondLoc, "incorrect condition in IT block; got '" +
4487 StringRef(ARMCondCodeToString(ARMCC::CondCodes(Cond))) +
4488 "', but expected '" +
4489 ARMCondCodeToString(ARMCC::CondCodes(ITCond)) + "'");
4491 // Check for non-'al' condition codes outside of the IT block.
4492 } else if (isThumbTwo() && MCID.isPredicable() &&
4493 Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm() !=
4494 ARMCC::AL && Inst.getOpcode() != ARM::tB &&
4495 Inst.getOpcode() != ARM::t2B)
4496 return Error(Loc, "predicated instructions must be in IT block");
4498 switch (Inst.getOpcode()) {
4501 case ARM::LDRD_POST:
4503 // Rt2 must be Rt + 1.
4504 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4505 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4507 return Error(Operands[3]->getStartLoc(),
4508 "destination operands must be sequential");
4512 // Rt2 must be Rt + 1.
4513 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4514 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4516 return Error(Operands[3]->getStartLoc(),
4517 "source operands must be sequential");
4521 case ARM::STRD_POST:
4523 // Rt2 must be Rt + 1.
4524 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4525 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
4527 return Error(Operands[3]->getStartLoc(),
4528 "source operands must be sequential");
4533 // width must be in range [1, 32-lsb]
4534 unsigned lsb = Inst.getOperand(2).getImm();
4535 unsigned widthm1 = Inst.getOperand(3).getImm();
4536 if (widthm1 >= 32 - lsb)
4537 return Error(Operands[5]->getStartLoc(),
4538 "bitfield width must be in range [1,32-lsb]");
4542 // If we're parsing Thumb2, the .w variant is available and handles
4543 // most cases that are normally illegal for a Thumb1 LDM
4544 // instruction. We'll make the transformation in processInstruction()
4547 // Thumb LDM instructions are writeback iff the base register is not
4548 // in the register list.
4549 unsigned Rn = Inst.getOperand(0).getReg();
4550 bool hasWritebackToken =
4551 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4552 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4553 bool listContainsBase;
4554 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) && !isThumbTwo())
4555 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
4556 "registers must be in range r0-r7");
4557 // If we should have writeback, then there should be a '!' token.
4558 if (!listContainsBase && !hasWritebackToken && !isThumbTwo())
4559 return Error(Operands[2]->getStartLoc(),
4560 "writeback operator '!' expected");
4561 // If we should not have writeback, there must not be a '!'. This is
4562 // true even for the 32-bit wide encodings.
4563 if (listContainsBase && hasWritebackToken)
4564 return Error(Operands[3]->getStartLoc(),
4565 "writeback operator '!' not allowed when base register "
4566 "in register list");
4570 case ARM::t2LDMIA_UPD: {
4571 if (listContainsReg(Inst, 3, Inst.getOperand(0).getReg()))
4572 return Error(Operands[4]->getStartLoc(),
4573 "writeback operator '!' not allowed when base register "
4574 "in register list");
4577 // Like for ldm/stm, push and pop have hi-reg handling version in Thumb2,
4578 // so only issue a diagnostic for thumb1. The instructions will be
4579 // switched to the t2 encodings in processInstruction() if necessary.
4581 bool listContainsBase;
4582 if (checkLowRegisterList(Inst, 2, 0, ARM::PC, listContainsBase) &&
4584 return Error(Operands[2]->getStartLoc(),
4585 "registers must be in range r0-r7 or pc");
4589 bool listContainsBase;
4590 if (checkLowRegisterList(Inst, 2, 0, ARM::LR, listContainsBase) &&
4592 return Error(Operands[2]->getStartLoc(),
4593 "registers must be in range r0-r7 or lr");
4596 case ARM::tSTMIA_UPD: {
4597 bool listContainsBase;
4598 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase) && !isThumbTwo())
4599 return Error(Operands[4]->getStartLoc(),
4600 "registers must be in range r0-r7");
4609 processInstruction(MCInst &Inst,
4610 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4611 switch (Inst.getOpcode()) {
4612 // Handle the MOV complex aliases.
4617 ARM_AM::ShiftOpc ShiftTy;
4618 switch(Inst.getOpcode()) {
4619 default: llvm_unreachable("unexpected opcode!");
4620 case ARM::ASRr: ShiftTy = ARM_AM::asr; break;
4621 case ARM::LSRr: ShiftTy = ARM_AM::lsr; break;
4622 case ARM::LSLr: ShiftTy = ARM_AM::lsl; break;
4623 case ARM::RORr: ShiftTy = ARM_AM::ror; break;
4625 // A shift by zero is a plain MOVr, not a MOVsi.
4626 unsigned Shifter = ARM_AM::getSORegOpc(ShiftTy, 0);
4628 TmpInst.setOpcode(ARM::MOVsr);
4629 TmpInst.addOperand(Inst.getOperand(0)); // Rd
4630 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4631 TmpInst.addOperand(Inst.getOperand(2)); // Rm
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
4643 ARM_AM::ShiftOpc ShiftTy;
4644 switch(Inst.getOpcode()) {
4645 default: llvm_unreachable("unexpected opcode!");
4646 case ARM::ASRi: ShiftTy = ARM_AM::asr; break;
4647 case ARM::LSRi: ShiftTy = ARM_AM::lsr; break;
4648 case ARM::LSLi: ShiftTy = ARM_AM::lsl; break;
4649 case ARM::RORi: ShiftTy = ARM_AM::ror; break;
4651 // A shift by zero is a plain MOVr, not a MOVsi.
4652 unsigned Amt = Inst.getOperand(2).getImm();
4653 unsigned Opc = Amt == 0 ? ARM::MOVr : ARM::MOVsi;
4654 unsigned Shifter = ARM_AM::getSORegOpc(ShiftTy, Amt);
4656 TmpInst.setOpcode(Opc);
4657 TmpInst.addOperand(Inst.getOperand(0)); // Rd
4658 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4659 if (Opc == ARM::MOVsi)
4660 TmpInst.addOperand(MCOperand::CreateImm(Shifter)); // Shift value and ty
4661 TmpInst.addOperand(Inst.getOperand(3)); // CondCode
4662 TmpInst.addOperand(Inst.getOperand(4));
4663 TmpInst.addOperand(Inst.getOperand(5)); // cc_out
4668 unsigned Shifter = ARM_AM::getSORegOpc(ARM_AM::rrx, 0);
4670 TmpInst.setOpcode(ARM::MOVsi);
4671 TmpInst.addOperand(Inst.getOperand(0)); // Rd
4672 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4673 TmpInst.addOperand(MCOperand::CreateImm(Shifter)); // Shift value and ty
4674 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4675 TmpInst.addOperand(Inst.getOperand(3));
4676 TmpInst.addOperand(Inst.getOperand(4)); // cc_out
4680 case ARM::t2LDMIA_UPD: {
4681 // If this is a load of a single register, then we should use
4682 // a post-indexed LDR instruction instead, per the ARM ARM.
4683 if (Inst.getNumOperands() != 5)
4686 TmpInst.setOpcode(ARM::t2LDR_POST);
4687 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4688 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4689 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4690 TmpInst.addOperand(MCOperand::CreateImm(4));
4691 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4692 TmpInst.addOperand(Inst.getOperand(3));
4696 case ARM::t2STMDB_UPD: {
4697 // If this is a store of a single register, then we should use
4698 // a pre-indexed STR instruction instead, per the ARM ARM.
4699 if (Inst.getNumOperands() != 5)
4702 TmpInst.setOpcode(ARM::t2STR_PRE);
4703 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4704 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4705 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4706 TmpInst.addOperand(MCOperand::CreateImm(-4));
4707 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4708 TmpInst.addOperand(Inst.getOperand(3));
4712 case ARM::LDMIA_UPD:
4713 // If this is a load of a single register via a 'pop', then we should use
4714 // a post-indexed LDR instruction instead, per the ARM ARM.
4715 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
4716 Inst.getNumOperands() == 5) {
4718 TmpInst.setOpcode(ARM::LDR_POST_IMM);
4719 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4720 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4721 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4722 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
4723 TmpInst.addOperand(MCOperand::CreateImm(4));
4724 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4725 TmpInst.addOperand(Inst.getOperand(3));
4730 case ARM::STMDB_UPD:
4731 // If this is a store of a single register via a 'push', then we should use
4732 // a pre-indexed STR instruction instead, per the ARM ARM.
4733 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
4734 Inst.getNumOperands() == 5) {
4736 TmpInst.setOpcode(ARM::STR_PRE_IMM);
4737 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4738 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4739 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
4740 TmpInst.addOperand(MCOperand::CreateImm(-4));
4741 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4742 TmpInst.addOperand(Inst.getOperand(3));
4747 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4748 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4749 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4750 // to encoding T1 if <Rd> is omitted."
4751 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6) {
4752 Inst.setOpcode(ARM::tADDi3);
4757 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4758 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4759 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4760 // to encoding T1 if <Rd> is omitted."
4761 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6) {
4762 Inst.setOpcode(ARM::tSUBi3);
4767 // A Thumb conditional branch outside of an IT block is a tBcc.
4768 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock()) {
4769 Inst.setOpcode(ARM::tBcc);
4774 // A Thumb2 conditional branch outside of an IT block is a t2Bcc.
4775 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock()){
4776 Inst.setOpcode(ARM::t2Bcc);
4781 // If the conditional is AL or we're in an IT block, we really want t2B.
4782 if (Inst.getOperand(1).getImm() == ARMCC::AL || inITBlock()) {
4783 Inst.setOpcode(ARM::t2B);
4788 // If the conditional is AL, we really want tB.
4789 if (Inst.getOperand(1).getImm() == ARMCC::AL) {
4790 Inst.setOpcode(ARM::tB);
4795 // If the register list contains any high registers, or if the writeback
4796 // doesn't match what tLDMIA can do, we need to use the 32-bit encoding
4797 // instead if we're in Thumb2. Otherwise, this should have generated
4798 // an error in validateInstruction().
4799 unsigned Rn = Inst.getOperand(0).getReg();
4800 bool hasWritebackToken =
4801 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4802 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4803 bool listContainsBase;
4804 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) ||
4805 (!listContainsBase && !hasWritebackToken) ||
4806 (listContainsBase && hasWritebackToken)) {
4807 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4808 assert (isThumbTwo());
4809 Inst.setOpcode(hasWritebackToken ? ARM::t2LDMIA_UPD : ARM::t2LDMIA);
4810 // If we're switching to the updating version, we need to insert
4811 // the writeback tied operand.
4812 if (hasWritebackToken)
4813 Inst.insert(Inst.begin(),
4814 MCOperand::CreateReg(Inst.getOperand(0).getReg()));
4819 case ARM::tSTMIA_UPD: {
4820 // If the register list contains any high registers, we need to use
4821 // the 32-bit encoding instead if we're in Thumb2. Otherwise, this
4822 // should have generated an error in validateInstruction().
4823 unsigned Rn = Inst.getOperand(0).getReg();
4824 bool listContainsBase;
4825 if (checkLowRegisterList(Inst, 4, Rn, 0, listContainsBase)) {
4826 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4827 assert (isThumbTwo());
4828 Inst.setOpcode(ARM::t2STMIA_UPD);
4834 bool listContainsBase;
4835 // If the register list contains any high registers, we need to use
4836 // the 32-bit encoding instead if we're in Thumb2. Otherwise, this
4837 // should have generated an error in validateInstruction().
4838 if (!checkLowRegisterList(Inst, 2, 0, ARM::PC, listContainsBase))
4840 assert (isThumbTwo());
4841 Inst.setOpcode(ARM::t2LDMIA_UPD);
4842 // Add the base register and writeback operands.
4843 Inst.insert(Inst.begin(), MCOperand::CreateReg(ARM::SP));
4844 Inst.insert(Inst.begin(), MCOperand::CreateReg(ARM::SP));
4848 bool listContainsBase;
4849 if (!checkLowRegisterList(Inst, 2, 0, ARM::LR, listContainsBase))
4851 assert (isThumbTwo());
4852 Inst.setOpcode(ARM::t2STMDB_UPD);
4853 // Add the base register and writeback operands.
4854 Inst.insert(Inst.begin(), MCOperand::CreateReg(ARM::SP));
4855 Inst.insert(Inst.begin(), MCOperand::CreateReg(ARM::SP));
4859 // If we can use the 16-bit encoding and the user didn't explicitly
4860 // request the 32-bit variant, transform it here.
4861 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4862 Inst.getOperand(1).getImm() <= 255 &&
4863 ((!inITBlock() && Inst.getOperand(2).getImm() == ARMCC::AL &&
4864 Inst.getOperand(4).getReg() == ARM::CPSR) ||
4865 (inITBlock() && Inst.getOperand(4).getReg() == 0)) &&
4866 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4867 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4868 // The operands aren't in the same order for tMOVi8...
4870 TmpInst.setOpcode(ARM::tMOVi8);
4871 TmpInst.addOperand(Inst.getOperand(0));
4872 TmpInst.addOperand(Inst.getOperand(4));
4873 TmpInst.addOperand(Inst.getOperand(1));
4874 TmpInst.addOperand(Inst.getOperand(2));
4875 TmpInst.addOperand(Inst.getOperand(3));
4882 // If we can use the 16-bit encoding and the user didn't explicitly
4883 // request the 32-bit variant, transform it here.
4884 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4885 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4886 Inst.getOperand(2).getImm() == ARMCC::AL &&
4887 Inst.getOperand(4).getReg() == ARM::CPSR &&
4888 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4889 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4890 // The operands aren't the same for tMOV[S]r... (no cc_out)
4892 TmpInst.setOpcode(Inst.getOperand(4).getReg() ? ARM::tMOVSr : ARM::tMOVr);
4893 TmpInst.addOperand(Inst.getOperand(0));
4894 TmpInst.addOperand(Inst.getOperand(1));
4895 TmpInst.addOperand(Inst.getOperand(2));
4896 TmpInst.addOperand(Inst.getOperand(3));
4906 // If we can use the 16-bit encoding and the user didn't explicitly
4907 // request the 32-bit variant, transform it here.
4908 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4909 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4910 Inst.getOperand(2).getImm() == 0 &&
4911 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4912 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4914 switch (Inst.getOpcode()) {
4915 default: llvm_unreachable("Illegal opcode!");
4916 case ARM::t2SXTH: NewOpc = ARM::tSXTH; break;
4917 case ARM::t2SXTB: NewOpc = ARM::tSXTB; break;
4918 case ARM::t2UXTH: NewOpc = ARM::tUXTH; break;
4919 case ARM::t2UXTB: NewOpc = ARM::tUXTB; break;
4921 // The operands aren't the same for thumb1 (no rotate operand).
4923 TmpInst.setOpcode(NewOpc);
4924 TmpInst.addOperand(Inst.getOperand(0));
4925 TmpInst.addOperand(Inst.getOperand(1));
4926 TmpInst.addOperand(Inst.getOperand(3));
4927 TmpInst.addOperand(Inst.getOperand(4));
4934 // The mask bits for all but the first condition are represented as
4935 // the low bit of the condition code value implies 't'. We currently
4936 // always have 1 implies 't', so XOR toggle the bits if the low bit
4937 // of the condition code is zero. The encoding also expects the low
4938 // bit of the condition to be encoded as bit 4 of the mask operand,
4939 // so mask that in if needed
4940 MCOperand &MO = Inst.getOperand(1);
4941 unsigned Mask = MO.getImm();
4942 unsigned OrigMask = Mask;
4943 unsigned TZ = CountTrailingZeros_32(Mask);
4944 if ((Inst.getOperand(0).getImm() & 1) == 0) {
4945 assert(Mask && TZ <= 3 && "illegal IT mask value!");
4946 for (unsigned i = 3; i != TZ; --i)
4952 // Set up the IT block state according to the IT instruction we just
4954 assert(!inITBlock() && "nested IT blocks?!");
4955 ITState.Cond = ARMCC::CondCodes(Inst.getOperand(0).getImm());
4956 ITState.Mask = OrigMask; // Use the original mask, not the updated one.
4957 ITState.CurPosition = 0;
4958 ITState.FirstCond = true;
4965 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
4966 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
4967 // suffix depending on whether they're in an IT block or not.
4968 unsigned Opc = Inst.getOpcode();
4969 const MCInstrDesc &MCID = getInstDesc(Opc);
4970 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
4971 assert(MCID.hasOptionalDef() &&
4972 "optionally flag setting instruction missing optional def operand");
4973 assert(MCID.NumOperands == Inst.getNumOperands() &&
4974 "operand count mismatch!");
4975 // Find the optional-def operand (cc_out).
4978 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
4981 // If we're parsing Thumb1, reject it completely.
4982 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
4983 return Match_MnemonicFail;
4984 // If we're parsing Thumb2, which form is legal depends on whether we're
4986 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR &&
4988 return Match_RequiresITBlock;
4989 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() == ARM::CPSR &&
4991 return Match_RequiresNotITBlock;
4993 // Some high-register supporting Thumb1 encodings only allow both registers
4994 // to be from r0-r7 when in Thumb2.
4995 else if (Opc == ARM::tADDhirr && isThumbOne() &&
4996 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4997 isARMLowRegister(Inst.getOperand(2).getReg()))
4998 return Match_RequiresThumb2;
4999 // Others only require ARMv6 or later.
5000 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
5001 isARMLowRegister(Inst.getOperand(0).getReg()) &&
5002 isARMLowRegister(Inst.getOperand(1).getReg()))
5003 return Match_RequiresV6;
5004 return Match_Success;
5008 MatchAndEmitInstruction(SMLoc IDLoc,
5009 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
5013 unsigned MatchResult;
5014 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
5015 switch (MatchResult) {
5018 // Context sensitive operand constraints aren't handled by the matcher,
5019 // so check them here.
5020 if (validateInstruction(Inst, Operands)) {
5021 // Still progress the IT block, otherwise one wrong condition causes
5022 // nasty cascading errors.
5023 forwardITPosition();
5027 // Some instructions need post-processing to, for example, tweak which
5028 // encoding is selected. Loop on it while changes happen so the
5029 // individual transformations can chain off each other. E.g.,
5030 // tPOP(r8)->t2LDMIA_UPD(sp,r8)->t2STR_POST(sp,r8)
5031 while (processInstruction(Inst, Operands))
5034 // Only move forward at the very end so that everything in validate
5035 // and process gets a consistent answer about whether we're in an IT
5037 forwardITPosition();
5039 Out.EmitInstruction(Inst);
5041 case Match_MissingFeature:
5042 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
5044 case Match_InvalidOperand: {
5045 SMLoc ErrorLoc = IDLoc;
5046 if (ErrorInfo != ~0U) {
5047 if (ErrorInfo >= Operands.size())
5048 return Error(IDLoc, "too few operands for instruction");
5050 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
5051 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
5054 return Error(ErrorLoc, "invalid operand for instruction");
5056 case Match_MnemonicFail:
5057 return Error(IDLoc, "invalid instruction");
5058 case Match_ConversionFail:
5059 // The converter function will have already emited a diagnostic.
5061 case Match_RequiresNotITBlock:
5062 return Error(IDLoc, "flag setting instruction only valid outside IT block");
5063 case Match_RequiresITBlock:
5064 return Error(IDLoc, "instruction only valid inside IT block");
5065 case Match_RequiresV6:
5066 return Error(IDLoc, "instruction variant requires ARMv6 or later");
5067 case Match_RequiresThumb2:
5068 return Error(IDLoc, "instruction variant requires Thumb2");
5071 llvm_unreachable("Implement any new match types added!");
5075 /// parseDirective parses the arm specific directives
5076 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
5077 StringRef IDVal = DirectiveID.getIdentifier();
5078 if (IDVal == ".word")
5079 return parseDirectiveWord(4, DirectiveID.getLoc());
5080 else if (IDVal == ".thumb")
5081 return parseDirectiveThumb(DirectiveID.getLoc());
5082 else if (IDVal == ".thumb_func")
5083 return parseDirectiveThumbFunc(DirectiveID.getLoc());
5084 else if (IDVal == ".code")
5085 return parseDirectiveCode(DirectiveID.getLoc());
5086 else if (IDVal == ".syntax")
5087 return parseDirectiveSyntax(DirectiveID.getLoc());
5091 /// parseDirectiveWord
5092 /// ::= .word [ expression (, expression)* ]
5093 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
5094 if (getLexer().isNot(AsmToken::EndOfStatement)) {
5096 const MCExpr *Value;
5097 if (getParser().ParseExpression(Value))
5100 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
5102 if (getLexer().is(AsmToken::EndOfStatement))
5105 // FIXME: Improve diagnostic.
5106 if (getLexer().isNot(AsmToken::Comma))
5107 return Error(L, "unexpected token in directive");
5116 /// parseDirectiveThumb
5118 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
5119 if (getLexer().isNot(AsmToken::EndOfStatement))
5120 return Error(L, "unexpected token in directive");
5123 // TODO: set thumb mode
5124 // TODO: tell the MC streamer the mode
5125 // getParser().getStreamer().Emit???();
5129 /// parseDirectiveThumbFunc
5130 /// ::= .thumbfunc symbol_name
5131 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
5132 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
5133 bool isMachO = MAI.hasSubsectionsViaSymbols();
5136 // Darwin asm has function name after .thumb_func direction
5139 const AsmToken &Tok = Parser.getTok();
5140 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
5141 return Error(L, "unexpected token in .thumb_func directive");
5142 Name = Tok.getIdentifier();
5143 Parser.Lex(); // Consume the identifier token.
5146 if (getLexer().isNot(AsmToken::EndOfStatement))
5147 return Error(L, "unexpected token in directive");
5150 // FIXME: assuming function name will be the line following .thumb_func
5152 Name = Parser.getTok().getIdentifier();
5155 // Mark symbol as a thumb symbol.
5156 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
5157 getParser().getStreamer().EmitThumbFunc(Func);
5161 /// parseDirectiveSyntax
5162 /// ::= .syntax unified | divided
5163 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
5164 const AsmToken &Tok = Parser.getTok();
5165 if (Tok.isNot(AsmToken::Identifier))
5166 return Error(L, "unexpected token in .syntax directive");
5167 StringRef Mode = Tok.getString();
5168 if (Mode == "unified" || Mode == "UNIFIED")
5170 else if (Mode == "divided" || Mode == "DIVIDED")
5171 return Error(L, "'.syntax divided' arm asssembly not supported");
5173 return Error(L, "unrecognized syntax mode in .syntax directive");
5175 if (getLexer().isNot(AsmToken::EndOfStatement))
5176 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
5179 // TODO tell the MC streamer the mode
5180 // getParser().getStreamer().Emit???();
5184 /// parseDirectiveCode
5185 /// ::= .code 16 | 32
5186 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
5187 const AsmToken &Tok = Parser.getTok();
5188 if (Tok.isNot(AsmToken::Integer))
5189 return Error(L, "unexpected token in .code directive");
5190 int64_t Val = Parser.getTok().getIntVal();
5196 return Error(L, "invalid operand to .code directive");
5198 if (getLexer().isNot(AsmToken::EndOfStatement))
5199 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
5205 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
5209 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
5215 extern "C" void LLVMInitializeARMAsmLexer();
5217 /// Force static initialization.
5218 extern "C" void LLVMInitializeARMAsmParser() {
5219 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
5220 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
5221 LLVMInitializeARMAsmLexer();
5224 #define GET_REGISTER_MATCHER
5225 #define GET_MATCHER_IMPLEMENTATION
5226 #include "ARMGenAsmMatcher.inc"