1 //===-- ARMAsmParser.cpp - Parse ARM assembly to MCInst instructions ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/ARMBaseInfo.h"
11 #include "MCTargetDesc/ARMAddressingModes.h"
12 #include "MCTargetDesc/ARMMCExpr.h"
13 #include "llvm/MC/MCParser/MCAsmLexer.h"
14 #include "llvm/MC/MCParser/MCAsmParser.h"
15 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
16 #include "llvm/MC/MCAsmInfo.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCStreamer.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCInstrDesc.h"
22 #include "llvm/MC/MCRegisterInfo.h"
23 #include "llvm/MC/MCSubtargetInfo.h"
24 #include "llvm/MC/MCTargetAsmParser.h"
25 #include "llvm/Support/MathExtras.h"
26 #include "llvm/Support/SourceMgr.h"
27 #include "llvm/Support/TargetRegistry.h"
28 #include "llvm/Support/raw_ostream.h"
29 #include "llvm/ADT/BitVector.h"
30 #include "llvm/ADT/OwningPtr.h"
31 #include "llvm/ADT/STLExtras.h"
32 #include "llvm/ADT/SmallVector.h"
33 #include "llvm/ADT/StringExtras.h"
34 #include "llvm/ADT/StringSwitch.h"
35 #include "llvm/ADT/Twine.h"
43 class ARMAsmParser : public MCTargetAsmParser {
48 ARMCC::CondCodes Cond; // Condition for IT block.
49 unsigned Mask:4; // Condition mask for instructions.
50 // Starting at first 1 (from lsb).
51 // '1' condition as indicated in IT.
52 // '0' inverse of condition (else).
53 // Count of instructions in IT block is
54 // 4 - trailingzeroes(mask)
56 bool FirstCond; // Explicit flag for when we're parsing the
57 // First instruction in the IT block. It's
58 // implied in the mask, so needs special
61 unsigned CurPosition; // Current position in parsing of IT
62 // block. In range [0,3]. Initialized
63 // according to count of instructions in block.
64 // ~0U if no active IT block.
66 bool inITBlock() { return ITState.CurPosition != ~0U;}
67 void forwardITPosition() {
68 if (!inITBlock()) return;
69 // Move to the next instruction in the IT block, if there is one. If not,
70 // mark the block as done.
71 unsigned TZ = CountTrailingZeros_32(ITState.Mask);
72 if (++ITState.CurPosition == 5 - TZ)
73 ITState.CurPosition = ~0U; // Done with the IT block after this.
77 MCAsmParser &getParser() const { return Parser; }
78 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
80 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
81 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
83 int tryParseRegister();
84 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
85 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
86 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
87 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
88 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
89 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
90 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
91 unsigned &ShiftAmount);
92 bool parseDirectiveWord(unsigned Size, SMLoc L);
93 bool parseDirectiveThumb(SMLoc L);
94 bool parseDirectiveThumbFunc(SMLoc L);
95 bool parseDirectiveCode(SMLoc L);
96 bool parseDirectiveSyntax(SMLoc L);
98 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
99 bool &CarrySetting, unsigned &ProcessorIMod,
101 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
102 bool &CanAcceptPredicationCode);
104 bool isThumb() const {
105 // FIXME: Can tablegen auto-generate this?
106 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
108 bool isThumbOne() const {
109 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
111 bool isThumbTwo() const {
112 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2);
114 bool hasV6Ops() const {
115 return STI.getFeatureBits() & ARM::HasV6Ops;
117 bool hasV7Ops() const {
118 return STI.getFeatureBits() & ARM::HasV7Ops;
121 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
122 setAvailableFeatures(FB);
124 bool isMClass() const {
125 return STI.getFeatureBits() & ARM::FeatureMClass;
128 /// @name Auto-generated Match Functions
131 #define GET_ASSEMBLER_HEADER
132 #include "ARMGenAsmMatcher.inc"
136 OperandMatchResultTy parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*>&);
137 OperandMatchResultTy parseCoprocNumOperand(
138 SmallVectorImpl<MCParsedAsmOperand*>&);
139 OperandMatchResultTy parseCoprocRegOperand(
140 SmallVectorImpl<MCParsedAsmOperand*>&);
141 OperandMatchResultTy parseCoprocOptionOperand(
142 SmallVectorImpl<MCParsedAsmOperand*>&);
143 OperandMatchResultTy parseMemBarrierOptOperand(
144 SmallVectorImpl<MCParsedAsmOperand*>&);
145 OperandMatchResultTy parseProcIFlagsOperand(
146 SmallVectorImpl<MCParsedAsmOperand*>&);
147 OperandMatchResultTy parseMSRMaskOperand(
148 SmallVectorImpl<MCParsedAsmOperand*>&);
149 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
150 StringRef Op, int Low, int High);
151 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
152 return parsePKHImm(O, "lsl", 0, 31);
154 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
155 return parsePKHImm(O, "asr", 1, 32);
157 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
158 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
159 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
160 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
161 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
162 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
163 OperandMatchResultTy parseFPImm(SmallVectorImpl<MCParsedAsmOperand*>&);
164 OperandMatchResultTy parseVectorList(SmallVectorImpl<MCParsedAsmOperand*>&);
166 // Asm Match Converter Methods
167 bool cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
168 const SmallVectorImpl<MCParsedAsmOperand*> &);
169 bool cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
170 const SmallVectorImpl<MCParsedAsmOperand*> &);
171 bool cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
172 const SmallVectorImpl<MCParsedAsmOperand*> &);
173 bool cvtStWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
174 const SmallVectorImpl<MCParsedAsmOperand*> &);
175 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
176 const SmallVectorImpl<MCParsedAsmOperand*> &);
177 bool cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
178 const SmallVectorImpl<MCParsedAsmOperand*> &);
179 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
180 const SmallVectorImpl<MCParsedAsmOperand*> &);
181 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
182 const SmallVectorImpl<MCParsedAsmOperand*> &);
183 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
184 const SmallVectorImpl<MCParsedAsmOperand*> &);
185 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
186 const SmallVectorImpl<MCParsedAsmOperand*> &);
187 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
188 const SmallVectorImpl<MCParsedAsmOperand*> &);
189 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
190 const SmallVectorImpl<MCParsedAsmOperand*> &);
191 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
192 const SmallVectorImpl<MCParsedAsmOperand*> &);
193 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
194 const SmallVectorImpl<MCParsedAsmOperand*> &);
195 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
196 const SmallVectorImpl<MCParsedAsmOperand*> &);
197 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
198 const SmallVectorImpl<MCParsedAsmOperand*> &);
199 bool cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
200 const SmallVectorImpl<MCParsedAsmOperand*> &);
201 bool cvtVLDwbFixed(MCInst &Inst, unsigned Opcode,
202 const SmallVectorImpl<MCParsedAsmOperand*> &);
203 bool cvtVLDwbRegister(MCInst &Inst, unsigned Opcode,
204 const SmallVectorImpl<MCParsedAsmOperand*> &);
206 bool validateInstruction(MCInst &Inst,
207 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
208 void processInstruction(MCInst &Inst,
209 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
210 bool shouldOmitCCOutOperand(StringRef Mnemonic,
211 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
214 enum ARMMatchResultTy {
215 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
216 Match_RequiresNotITBlock,
221 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
222 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
223 MCAsmParserExtension::Initialize(_Parser);
225 // Initialize the set of available features.
226 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
228 // Not in an ITBlock to start with.
229 ITState.CurPosition = ~0U;
232 // Implementation of the MCTargetAsmParser interface:
233 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
234 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
235 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
236 bool ParseDirective(AsmToken DirectiveID);
238 unsigned checkTargetMatchPredicate(MCInst &Inst);
240 bool MatchAndEmitInstruction(SMLoc IDLoc,
241 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
244 } // end anonymous namespace
248 /// ARMOperand - Instances of this class represent a parsed ARM machine
250 class ARMOperand : public MCParsedAsmOperand {
275 k_BitfieldDescriptor,
279 SMLoc StartLoc, EndLoc;
280 SmallVector<unsigned, 8> Registers;
284 ARMCC::CondCodes Val;
304 ARM_PROC::IFlags Val;
320 // A vector register list is a sequential list of 1 to 4 registers.
335 unsigned Val; // encoded 8-bit representation
338 /// Combined record for all forms of ARM address expressions.
341 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
343 const MCConstantExpr *OffsetImm; // Offset immediate value
344 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
345 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
346 unsigned ShiftImm; // shift for OffsetReg.
347 unsigned Alignment; // 0 = no alignment specified
348 // n = alignment in bytes (8, 16, or 32)
349 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
355 ARM_AM::ShiftOpc ShiftTy;
364 ARM_AM::ShiftOpc ShiftTy;
370 ARM_AM::ShiftOpc ShiftTy;
383 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
385 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
387 StartLoc = o.StartLoc;
404 case k_DPRRegisterList:
405 case k_SPRRegisterList:
406 Registers = o.Registers;
409 VectorList = o.VectorList;
416 CoprocOption = o.CoprocOption;
424 case k_MemBarrierOpt:
430 case k_PostIndexRegister:
431 PostIdxReg = o.PostIdxReg;
439 case k_ShifterImmediate:
440 ShifterImm = o.ShifterImm;
442 case k_ShiftedRegister:
443 RegShiftedReg = o.RegShiftedReg;
445 case k_ShiftedImmediate:
446 RegShiftedImm = o.RegShiftedImm;
448 case k_RotateImmediate:
451 case k_BitfieldDescriptor:
452 Bitfield = o.Bitfield;
455 VectorIndex = o.VectorIndex;
460 /// getStartLoc - Get the location of the first token of this operand.
461 SMLoc getStartLoc() const { return StartLoc; }
462 /// getEndLoc - Get the location of the last token of this operand.
463 SMLoc getEndLoc() const { return EndLoc; }
465 ARMCC::CondCodes getCondCode() const {
466 assert(Kind == k_CondCode && "Invalid access!");
470 unsigned getCoproc() const {
471 assert((Kind == k_CoprocNum || Kind == k_CoprocReg) && "Invalid access!");
475 StringRef getToken() const {
476 assert(Kind == k_Token && "Invalid access!");
477 return StringRef(Tok.Data, Tok.Length);
480 unsigned getReg() const {
481 assert((Kind == k_Register || Kind == k_CCOut) && "Invalid access!");
485 const SmallVectorImpl<unsigned> &getRegList() const {
486 assert((Kind == k_RegisterList || Kind == k_DPRRegisterList ||
487 Kind == k_SPRRegisterList) && "Invalid access!");
491 const MCExpr *getImm() const {
492 assert(Kind == k_Immediate && "Invalid access!");
496 unsigned getFPImm() const {
497 assert(Kind == k_FPImmediate && "Invalid access!");
501 unsigned getVectorIndex() const {
502 assert(Kind == k_VectorIndex && "Invalid access!");
503 return VectorIndex.Val;
506 ARM_MB::MemBOpt getMemBarrierOpt() const {
507 assert(Kind == k_MemBarrierOpt && "Invalid access!");
511 ARM_PROC::IFlags getProcIFlags() const {
512 assert(Kind == k_ProcIFlags && "Invalid access!");
516 unsigned getMSRMask() const {
517 assert(Kind == k_MSRMask && "Invalid access!");
521 bool isCoprocNum() const { return Kind == k_CoprocNum; }
522 bool isCoprocReg() const { return Kind == k_CoprocReg; }
523 bool isCoprocOption() const { return Kind == k_CoprocOption; }
524 bool isCondCode() const { return Kind == k_CondCode; }
525 bool isCCOut() const { return Kind == k_CCOut; }
526 bool isITMask() const { return Kind == k_ITCondMask; }
527 bool isITCondCode() const { return Kind == k_CondCode; }
528 bool isImm() const { return Kind == k_Immediate; }
529 bool isFPImm() const { return Kind == k_FPImmediate; }
530 bool isImm8s4() const {
531 if (Kind != k_Immediate)
533 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
534 if (!CE) return false;
535 int64_t Value = CE->getValue();
536 return ((Value & 3) == 0) && Value >= -1020 && Value <= 1020;
538 bool isImm0_1020s4() const {
539 if (Kind != k_Immediate)
541 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
542 if (!CE) return false;
543 int64_t Value = CE->getValue();
544 return ((Value & 3) == 0) && Value >= 0 && Value <= 1020;
546 bool isImm0_508s4() const {
547 if (Kind != k_Immediate)
549 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
550 if (!CE) return false;
551 int64_t Value = CE->getValue();
552 return ((Value & 3) == 0) && Value >= 0 && Value <= 508;
554 bool isImm0_255() const {
555 if (Kind != k_Immediate)
557 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
558 if (!CE) return false;
559 int64_t Value = CE->getValue();
560 return Value >= 0 && Value < 256;
562 bool isImm0_7() const {
563 if (Kind != k_Immediate)
565 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
566 if (!CE) return false;
567 int64_t Value = CE->getValue();
568 return Value >= 0 && Value < 8;
570 bool isImm0_15() const {
571 if (Kind != k_Immediate)
573 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
574 if (!CE) return false;
575 int64_t Value = CE->getValue();
576 return Value >= 0 && Value < 16;
578 bool isImm0_31() const {
579 if (Kind != k_Immediate)
581 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
582 if (!CE) return false;
583 int64_t Value = CE->getValue();
584 return Value >= 0 && Value < 32;
586 bool isImm1_16() const {
587 if (Kind != k_Immediate)
589 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
590 if (!CE) return false;
591 int64_t Value = CE->getValue();
592 return Value > 0 && Value < 17;
594 bool isImm1_32() const {
595 if (Kind != k_Immediate)
597 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
598 if (!CE) return false;
599 int64_t Value = CE->getValue();
600 return Value > 0 && Value < 33;
602 bool isImm0_65535() const {
603 if (Kind != k_Immediate)
605 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
606 if (!CE) return false;
607 int64_t Value = CE->getValue();
608 return Value >= 0 && Value < 65536;
610 bool isImm0_65535Expr() const {
611 if (Kind != k_Immediate)
613 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
614 // If it's not a constant expression, it'll generate a fixup and be
616 if (!CE) return true;
617 int64_t Value = CE->getValue();
618 return Value >= 0 && Value < 65536;
620 bool isImm24bit() const {
621 if (Kind != k_Immediate)
623 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
624 if (!CE) return false;
625 int64_t Value = CE->getValue();
626 return Value >= 0 && Value <= 0xffffff;
628 bool isImmThumbSR() const {
629 if (Kind != k_Immediate)
631 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
632 if (!CE) return false;
633 int64_t Value = CE->getValue();
634 return Value > 0 && Value < 33;
636 bool isPKHLSLImm() const {
637 if (Kind != k_Immediate)
639 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
640 if (!CE) return false;
641 int64_t Value = CE->getValue();
642 return Value >= 0 && Value < 32;
644 bool isPKHASRImm() const {
645 if (Kind != k_Immediate)
647 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
648 if (!CE) return false;
649 int64_t Value = CE->getValue();
650 return Value > 0 && Value <= 32;
652 bool isARMSOImm() const {
653 if (Kind != k_Immediate)
655 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
656 if (!CE) return false;
657 int64_t Value = CE->getValue();
658 return ARM_AM::getSOImmVal(Value) != -1;
660 bool isT2SOImm() const {
661 if (Kind != k_Immediate)
663 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
664 if (!CE) return false;
665 int64_t Value = CE->getValue();
666 return ARM_AM::getT2SOImmVal(Value) != -1;
668 bool isSetEndImm() const {
669 if (Kind != k_Immediate)
671 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
672 if (!CE) return false;
673 int64_t Value = CE->getValue();
674 return Value == 1 || Value == 0;
676 bool isReg() const { return Kind == k_Register; }
677 bool isRegList() const { return Kind == k_RegisterList; }
678 bool isDPRRegList() const { return Kind == k_DPRRegisterList; }
679 bool isSPRRegList() const { return Kind == k_SPRRegisterList; }
680 bool isToken() const { return Kind == k_Token; }
681 bool isMemBarrierOpt() const { return Kind == k_MemBarrierOpt; }
682 bool isMemory() const { return Kind == k_Memory; }
683 bool isShifterImm() const { return Kind == k_ShifterImmediate; }
684 bool isRegShiftedReg() const { return Kind == k_ShiftedRegister; }
685 bool isRegShiftedImm() const { return Kind == k_ShiftedImmediate; }
686 bool isRotImm() const { return Kind == k_RotateImmediate; }
687 bool isBitfield() const { return Kind == k_BitfieldDescriptor; }
688 bool isPostIdxRegShifted() const { return Kind == k_PostIndexRegister; }
689 bool isPostIdxReg() const {
690 return Kind == k_PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
692 bool isMemNoOffset(bool alignOK = false) const {
695 // No offset of any kind.
696 return Memory.OffsetRegNum == 0 && Memory.OffsetImm == 0 &&
697 (alignOK || Memory.Alignment == 0);
699 bool isAlignedMemory() const {
700 return isMemNoOffset(true);
702 bool isAddrMode2() const {
703 if (!isMemory() || Memory.Alignment != 0) return false;
704 // Check for register offset.
705 if (Memory.OffsetRegNum) return true;
706 // Immediate offset in range [-4095, 4095].
707 if (!Memory.OffsetImm) return true;
708 int64_t Val = Memory.OffsetImm->getValue();
709 return Val > -4096 && Val < 4096;
711 bool isAM2OffsetImm() const {
712 if (Kind != k_Immediate)
714 // Immediate offset in range [-4095, 4095].
715 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
716 if (!CE) return false;
717 int64_t Val = CE->getValue();
718 return Val > -4096 && Val < 4096;
720 bool isAddrMode3() const {
721 if (!isMemory() || Memory.Alignment != 0) return false;
722 // No shifts are legal for AM3.
723 if (Memory.ShiftType != ARM_AM::no_shift) return false;
724 // Check for register offset.
725 if (Memory.OffsetRegNum) return true;
726 // Immediate offset in range [-255, 255].
727 if (!Memory.OffsetImm) return true;
728 int64_t Val = Memory.OffsetImm->getValue();
729 return Val > -256 && Val < 256;
731 bool isAM3Offset() const {
732 if (Kind != k_Immediate && Kind != k_PostIndexRegister)
734 if (Kind == k_PostIndexRegister)
735 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
736 // Immediate offset in range [-255, 255].
737 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
738 if (!CE) return false;
739 int64_t Val = CE->getValue();
740 // Special case, #-0 is INT32_MIN.
741 return (Val > -256 && Val < 256) || Val == INT32_MIN;
743 bool isAddrMode5() const {
744 if (!isMemory() || Memory.Alignment != 0) return false;
745 // Check for register offset.
746 if (Memory.OffsetRegNum) return false;
747 // Immediate offset in range [-1020, 1020] and a multiple of 4.
748 if (!Memory.OffsetImm) return true;
749 int64_t Val = Memory.OffsetImm->getValue();
750 return (Val >= -1020 && Val <= 1020 && ((Val & 3) == 0)) ||
753 bool isMemTBB() const {
754 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
755 Memory.ShiftType != ARM_AM::no_shift || Memory.Alignment != 0)
759 bool isMemTBH() const {
760 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
761 Memory.ShiftType != ARM_AM::lsl || Memory.ShiftImm != 1 ||
762 Memory.Alignment != 0 )
766 bool isMemRegOffset() const {
767 if (!isMemory() || !Memory.OffsetRegNum || Memory.Alignment != 0)
771 bool isT2MemRegOffset() const {
772 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
773 Memory.Alignment != 0)
775 // Only lsl #{0, 1, 2, 3} allowed.
776 if (Memory.ShiftType == ARM_AM::no_shift)
778 if (Memory.ShiftType != ARM_AM::lsl || Memory.ShiftImm > 3)
782 bool isMemThumbRR() const {
783 // Thumb reg+reg addressing is simple. Just two registers, a base and
784 // an offset. No shifts, negations or any other complicating factors.
785 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
786 Memory.ShiftType != ARM_AM::no_shift || Memory.Alignment != 0)
788 return isARMLowRegister(Memory.BaseRegNum) &&
789 (!Memory.OffsetRegNum || isARMLowRegister(Memory.OffsetRegNum));
791 bool isMemThumbRIs4() const {
792 if (!isMemory() || Memory.OffsetRegNum != 0 ||
793 !isARMLowRegister(Memory.BaseRegNum) || Memory.Alignment != 0)
795 // Immediate offset, multiple of 4 in range [0, 124].
796 if (!Memory.OffsetImm) return true;
797 int64_t Val = Memory.OffsetImm->getValue();
798 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
800 bool isMemThumbRIs2() const {
801 if (!isMemory() || Memory.OffsetRegNum != 0 ||
802 !isARMLowRegister(Memory.BaseRegNum) || Memory.Alignment != 0)
804 // Immediate offset, multiple of 4 in range [0, 62].
805 if (!Memory.OffsetImm) return true;
806 int64_t Val = Memory.OffsetImm->getValue();
807 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
809 bool isMemThumbRIs1() const {
810 if (!isMemory() || Memory.OffsetRegNum != 0 ||
811 !isARMLowRegister(Memory.BaseRegNum) || Memory.Alignment != 0)
813 // Immediate offset in range [0, 31].
814 if (!Memory.OffsetImm) return true;
815 int64_t Val = Memory.OffsetImm->getValue();
816 return Val >= 0 && Val <= 31;
818 bool isMemThumbSPI() const {
819 if (!isMemory() || Memory.OffsetRegNum != 0 ||
820 Memory.BaseRegNum != ARM::SP || Memory.Alignment != 0)
822 // Immediate offset, multiple of 4 in range [0, 1020].
823 if (!Memory.OffsetImm) return true;
824 int64_t Val = Memory.OffsetImm->getValue();
825 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
827 bool isMemImm8s4Offset() const {
828 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
830 // Immediate offset a multiple of 4 in range [-1020, 1020].
831 if (!Memory.OffsetImm) return true;
832 int64_t Val = Memory.OffsetImm->getValue();
833 return Val >= -1020 && Val <= 1020 && (Val & 3) == 0;
835 bool isMemImm0_1020s4Offset() const {
836 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
838 // Immediate offset a multiple of 4 in range [0, 1020].
839 if (!Memory.OffsetImm) return true;
840 int64_t Val = Memory.OffsetImm->getValue();
841 return Val >= 0 && Val <= 1020 && (Val & 3) == 0;
843 bool isMemImm8Offset() const {
844 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
846 // Immediate offset in range [-255, 255].
847 if (!Memory.OffsetImm) return true;
848 int64_t Val = Memory.OffsetImm->getValue();
849 return (Val == INT32_MIN) || (Val > -256 && Val < 256);
851 bool isMemPosImm8Offset() const {
852 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
854 // Immediate offset in range [0, 255].
855 if (!Memory.OffsetImm) return true;
856 int64_t Val = Memory.OffsetImm->getValue();
857 return Val >= 0 && Val < 256;
859 bool isMemNegImm8Offset() const {
860 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
862 // Immediate offset in range [-255, -1].
863 if (!Memory.OffsetImm) return true;
864 int64_t Val = Memory.OffsetImm->getValue();
865 return Val > -256 && Val < 0;
867 bool isMemUImm12Offset() const {
868 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
870 // Immediate offset in range [0, 4095].
871 if (!Memory.OffsetImm) return true;
872 int64_t Val = Memory.OffsetImm->getValue();
873 return (Val >= 0 && Val < 4096);
875 bool isMemImm12Offset() const {
876 // If we have an immediate that's not a constant, treat it as a label
877 // reference needing a fixup. If it is a constant, it's something else
879 if (Kind == k_Immediate && !isa<MCConstantExpr>(getImm()))
882 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
884 // Immediate offset in range [-4095, 4095].
885 if (!Memory.OffsetImm) return true;
886 int64_t Val = Memory.OffsetImm->getValue();
887 return (Val > -4096 && Val < 4096) || (Val == INT32_MIN);
889 bool isPostIdxImm8() const {
890 if (Kind != k_Immediate)
892 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
893 if (!CE) return false;
894 int64_t Val = CE->getValue();
895 return (Val > -256 && Val < 256) || (Val == INT32_MIN);
897 bool isPostIdxImm8s4() const {
898 if (Kind != k_Immediate)
900 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
901 if (!CE) return false;
902 int64_t Val = CE->getValue();
903 return ((Val & 3) == 0 && Val >= -1020 && Val <= 1020) ||
907 bool isMSRMask() const { return Kind == k_MSRMask; }
908 bool isProcIFlags() const { return Kind == k_ProcIFlags; }
911 bool isVecListOneD() const {
912 if (Kind != k_VectorList) return false;
913 return VectorList.Count == 1;
916 bool isVecListTwoD() const {
917 if (Kind != k_VectorList) return false;
918 return VectorList.Count == 2;
921 bool isVecListThreeD() const {
922 if (Kind != k_VectorList) return false;
923 return VectorList.Count == 3;
926 bool isVecListFourD() const {
927 if (Kind != k_VectorList) return false;
928 return VectorList.Count == 4;
931 bool isVecListTwoQ() const {
932 if (Kind != k_VectorList) return false;
933 //FIXME: We haven't taught the parser to handle by-two register lists
934 // yet, so don't pretend to know one.
935 return VectorList.Count == 2 && false;
938 bool isVectorIndex8() const {
939 if (Kind != k_VectorIndex) return false;
940 return VectorIndex.Val < 8;
942 bool isVectorIndex16() const {
943 if (Kind != k_VectorIndex) return false;
944 return VectorIndex.Val < 4;
946 bool isVectorIndex32() const {
947 if (Kind != k_VectorIndex) return false;
948 return VectorIndex.Val < 2;
951 bool isNEONi8splat() const {
952 if (Kind != k_Immediate)
954 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
955 // Must be a constant.
956 if (!CE) return false;
957 int64_t Value = CE->getValue();
958 // i8 value splatted across 8 bytes. The immediate is just the 8 byte
960 return Value >= 0 && Value < 256;
963 bool isNEONi16splat() const {
964 if (Kind != k_Immediate)
966 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
967 // Must be a constant.
968 if (!CE) return false;
969 int64_t Value = CE->getValue();
970 // i16 value in the range [0,255] or [0x0100, 0xff00]
971 return (Value >= 0 && Value < 256) || (Value >= 0x0100 && Value <= 0xff00);
974 bool isNEONi32splat() const {
975 if (Kind != k_Immediate)
977 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
978 // Must be a constant.
979 if (!CE) return false;
980 int64_t Value = CE->getValue();
981 // i32 value with set bits only in one byte X000, 0X00, 00X0, or 000X.
982 return (Value >= 0 && Value < 256) ||
983 (Value >= 0x0100 && Value <= 0xff00) ||
984 (Value >= 0x010000 && Value <= 0xff0000) ||
985 (Value >= 0x01000000 && Value <= 0xff000000);
988 bool isNEONi32vmov() const {
989 if (Kind != k_Immediate)
991 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
992 // Must be a constant.
993 if (!CE) return false;
994 int64_t Value = CE->getValue();
995 // i32 value with set bits only in one byte X000, 0X00, 00X0, or 000X,
996 // for VMOV/VMVN only, 00Xf or 0Xff are also accepted.
997 return (Value >= 0 && Value < 256) ||
998 (Value >= 0x0100 && Value <= 0xff00) ||
999 (Value >= 0x010000 && Value <= 0xff0000) ||
1000 (Value >= 0x01000000 && Value <= 0xff000000) ||
1001 (Value >= 0x01ff && Value <= 0xffff && (Value & 0xff) == 0xff) ||
1002 (Value >= 0x01ffff && Value <= 0xffffff && (Value & 0xffff) == 0xffff);
1005 bool isNEONi64splat() const {
1006 if (Kind != k_Immediate)
1008 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1009 // Must be a constant.
1010 if (!CE) return false;
1011 uint64_t Value = CE->getValue();
1012 // i64 value with each byte being either 0 or 0xff.
1013 for (unsigned i = 0; i < 8; ++i)
1014 if ((Value & 0xff) != 0 && (Value & 0xff) != 0xff) return false;
1018 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
1019 // Add as immediates when possible. Null MCExpr = 0.
1021 Inst.addOperand(MCOperand::CreateImm(0));
1022 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
1023 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
1025 Inst.addOperand(MCOperand::CreateExpr(Expr));
1028 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
1029 assert(N == 2 && "Invalid number of operands!");
1030 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
1031 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
1032 Inst.addOperand(MCOperand::CreateReg(RegNum));
1035 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
1036 assert(N == 1 && "Invalid number of operands!");
1037 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
1040 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
1041 assert(N == 1 && "Invalid number of operands!");
1042 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
1045 void addCoprocOptionOperands(MCInst &Inst, unsigned N) const {
1046 assert(N == 1 && "Invalid number of operands!");
1047 Inst.addOperand(MCOperand::CreateImm(CoprocOption.Val));
1050 void addITMaskOperands(MCInst &Inst, unsigned N) const {
1051 assert(N == 1 && "Invalid number of operands!");
1052 Inst.addOperand(MCOperand::CreateImm(ITMask.Mask));
1055 void addITCondCodeOperands(MCInst &Inst, unsigned N) const {
1056 assert(N == 1 && "Invalid number of operands!");
1057 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
1060 void addCCOutOperands(MCInst &Inst, unsigned N) const {
1061 assert(N == 1 && "Invalid number of operands!");
1062 Inst.addOperand(MCOperand::CreateReg(getReg()));
1065 void addRegOperands(MCInst &Inst, unsigned N) const {
1066 assert(N == 1 && "Invalid number of operands!");
1067 Inst.addOperand(MCOperand::CreateReg(getReg()));
1070 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
1071 assert(N == 3 && "Invalid number of operands!");
1072 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
1073 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
1074 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
1075 Inst.addOperand(MCOperand::CreateImm(
1076 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
1079 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
1080 assert(N == 2 && "Invalid number of operands!");
1081 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
1082 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
1083 Inst.addOperand(MCOperand::CreateImm(
1084 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
1087 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
1088 assert(N == 1 && "Invalid number of operands!");
1089 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
1093 void addRegListOperands(MCInst &Inst, unsigned N) const {
1094 assert(N == 1 && "Invalid number of operands!");
1095 const SmallVectorImpl<unsigned> &RegList = getRegList();
1096 for (SmallVectorImpl<unsigned>::const_iterator
1097 I = RegList.begin(), E = RegList.end(); I != E; ++I)
1098 Inst.addOperand(MCOperand::CreateReg(*I));
1101 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
1102 addRegListOperands(Inst, N);
1105 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
1106 addRegListOperands(Inst, N);
1109 void addRotImmOperands(MCInst &Inst, unsigned N) const {
1110 assert(N == 1 && "Invalid number of operands!");
1111 // Encoded as val>>3. The printer handles display as 8, 16, 24.
1112 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
1115 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
1116 assert(N == 1 && "Invalid number of operands!");
1117 // Munge the lsb/width into a bitfield mask.
1118 unsigned lsb = Bitfield.LSB;
1119 unsigned width = Bitfield.Width;
1120 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
1121 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
1122 (32 - (lsb + width)));
1123 Inst.addOperand(MCOperand::CreateImm(Mask));
1126 void addImmOperands(MCInst &Inst, unsigned N) const {
1127 assert(N == 1 && "Invalid number of operands!");
1128 addExpr(Inst, getImm());
1131 void addFPImmOperands(MCInst &Inst, unsigned N) const {
1132 assert(N == 1 && "Invalid number of operands!");
1133 Inst.addOperand(MCOperand::CreateImm(getFPImm()));
1136 void addImm8s4Operands(MCInst &Inst, unsigned N) const {
1137 assert(N == 1 && "Invalid number of operands!");
1138 // FIXME: We really want to scale the value here, but the LDRD/STRD
1139 // instruction don't encode operands that way yet.
1140 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1141 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
1144 void addImm0_1020s4Operands(MCInst &Inst, unsigned N) const {
1145 assert(N == 1 && "Invalid number of operands!");
1146 // The immediate is scaled by four in the encoding and is stored
1147 // in the MCInst as such. Lop off the low two bits here.
1148 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1149 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
1152 void addImm0_508s4Operands(MCInst &Inst, unsigned N) const {
1153 assert(N == 1 && "Invalid number of operands!");
1154 // The immediate is scaled by four in the encoding and is stored
1155 // in the MCInst as such. Lop off the low two bits here.
1156 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1157 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
1160 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
1161 assert(N == 1 && "Invalid number of operands!");
1162 addExpr(Inst, getImm());
1165 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
1166 assert(N == 1 && "Invalid number of operands!");
1167 addExpr(Inst, getImm());
1170 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
1171 assert(N == 1 && "Invalid number of operands!");
1172 addExpr(Inst, getImm());
1175 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
1176 assert(N == 1 && "Invalid number of operands!");
1177 addExpr(Inst, getImm());
1180 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
1181 assert(N == 1 && "Invalid number of operands!");
1182 // The constant encodes as the immediate-1, and we store in the instruction
1183 // the bits as encoded, so subtract off one here.
1184 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1185 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
1188 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
1189 assert(N == 1 && "Invalid number of operands!");
1190 // The constant encodes as the immediate-1, and we store in the instruction
1191 // the bits as encoded, so subtract off one here.
1192 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1193 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
1196 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
1197 assert(N == 1 && "Invalid number of operands!");
1198 addExpr(Inst, getImm());
1201 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
1202 assert(N == 1 && "Invalid number of operands!");
1203 addExpr(Inst, getImm());
1206 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
1207 assert(N == 1 && "Invalid number of operands!");
1208 addExpr(Inst, getImm());
1211 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
1212 assert(N == 1 && "Invalid number of operands!");
1213 // The constant encodes as the immediate, except for 32, which encodes as
1215 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1216 unsigned Imm = CE->getValue();
1217 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
1220 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
1221 assert(N == 1 && "Invalid number of operands!");
1222 addExpr(Inst, getImm());
1225 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
1226 assert(N == 1 && "Invalid number of operands!");
1227 // An ASR value of 32 encodes as 0, so that's how we want to add it to
1228 // the instruction as well.
1229 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1230 int Val = CE->getValue();
1231 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
1234 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
1235 assert(N == 1 && "Invalid number of operands!");
1236 addExpr(Inst, getImm());
1239 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
1240 assert(N == 1 && "Invalid number of operands!");
1241 addExpr(Inst, getImm());
1244 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
1245 assert(N == 1 && "Invalid number of operands!");
1246 addExpr(Inst, getImm());
1249 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
1250 assert(N == 1 && "Invalid number of operands!");
1251 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
1254 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
1255 assert(N == 1 && "Invalid number of operands!");
1256 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1259 void addAlignedMemoryOperands(MCInst &Inst, unsigned N) const {
1260 assert(N == 2 && "Invalid number of operands!");
1261 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1262 Inst.addOperand(MCOperand::CreateImm(Memory.Alignment));
1265 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
1266 assert(N == 3 && "Invalid number of operands!");
1267 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1268 if (!Memory.OffsetRegNum) {
1269 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1270 // Special case for #-0
1271 if (Val == INT32_MIN) Val = 0;
1272 if (Val < 0) Val = -Val;
1273 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1275 // For register offset, we encode the shift type and negation flag
1277 Val = ARM_AM::getAM2Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add,
1278 Memory.ShiftImm, Memory.ShiftType);
1280 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1281 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1282 Inst.addOperand(MCOperand::CreateImm(Val));
1285 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
1286 assert(N == 2 && "Invalid number of operands!");
1287 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1288 assert(CE && "non-constant AM2OffsetImm operand!");
1289 int32_t Val = CE->getValue();
1290 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1291 // Special case for #-0
1292 if (Val == INT32_MIN) Val = 0;
1293 if (Val < 0) Val = -Val;
1294 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1295 Inst.addOperand(MCOperand::CreateReg(0));
1296 Inst.addOperand(MCOperand::CreateImm(Val));
1299 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
1300 assert(N == 3 && "Invalid number of operands!");
1301 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1302 if (!Memory.OffsetRegNum) {
1303 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1304 // Special case for #-0
1305 if (Val == INT32_MIN) Val = 0;
1306 if (Val < 0) Val = -Val;
1307 Val = ARM_AM::getAM3Opc(AddSub, Val);
1309 // For register offset, we encode the shift type and negation flag
1311 Val = ARM_AM::getAM3Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
1313 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1314 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1315 Inst.addOperand(MCOperand::CreateImm(Val));
1318 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
1319 assert(N == 2 && "Invalid number of operands!");
1320 if (Kind == k_PostIndexRegister) {
1322 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
1323 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1324 Inst.addOperand(MCOperand::CreateImm(Val));
1329 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
1330 int32_t Val = CE->getValue();
1331 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1332 // Special case for #-0
1333 if (Val == INT32_MIN) Val = 0;
1334 if (Val < 0) Val = -Val;
1335 Val = ARM_AM::getAM3Opc(AddSub, Val);
1336 Inst.addOperand(MCOperand::CreateReg(0));
1337 Inst.addOperand(MCOperand::CreateImm(Val));
1340 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
1341 assert(N == 2 && "Invalid number of operands!");
1342 // The lower two bits are always zero and as such are not encoded.
1343 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() / 4 : 0;
1344 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1345 // Special case for #-0
1346 if (Val == INT32_MIN) Val = 0;
1347 if (Val < 0) Val = -Val;
1348 Val = ARM_AM::getAM5Opc(AddSub, Val);
1349 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1350 Inst.addOperand(MCOperand::CreateImm(Val));
1353 void addMemImm8s4OffsetOperands(MCInst &Inst, unsigned N) const {
1354 assert(N == 2 && "Invalid number of operands!");
1355 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1356 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1357 Inst.addOperand(MCOperand::CreateImm(Val));
1360 void addMemImm0_1020s4OffsetOperands(MCInst &Inst, unsigned N) const {
1361 assert(N == 2 && "Invalid number of operands!");
1362 // The lower two bits are always zero and as such are not encoded.
1363 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() / 4 : 0;
1364 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1365 Inst.addOperand(MCOperand::CreateImm(Val));
1368 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1369 assert(N == 2 && "Invalid number of operands!");
1370 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1371 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1372 Inst.addOperand(MCOperand::CreateImm(Val));
1375 void addMemPosImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1376 addMemImm8OffsetOperands(Inst, N);
1379 void addMemNegImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1380 addMemImm8OffsetOperands(Inst, N);
1383 void addMemUImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1384 assert(N == 2 && "Invalid number of operands!");
1385 // If this is an immediate, it's a label reference.
1386 if (Kind == k_Immediate) {
1387 addExpr(Inst, getImm());
1388 Inst.addOperand(MCOperand::CreateImm(0));
1392 // Otherwise, it's a normal memory reg+offset.
1393 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1394 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1395 Inst.addOperand(MCOperand::CreateImm(Val));
1398 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1399 assert(N == 2 && "Invalid number of operands!");
1400 // If this is an immediate, it's a label reference.
1401 if (Kind == k_Immediate) {
1402 addExpr(Inst, getImm());
1403 Inst.addOperand(MCOperand::CreateImm(0));
1407 // Otherwise, it's a normal memory reg+offset.
1408 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1409 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1410 Inst.addOperand(MCOperand::CreateImm(Val));
1413 void addMemTBBOperands(MCInst &Inst, unsigned N) const {
1414 assert(N == 2 && "Invalid number of operands!");
1415 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1416 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1419 void addMemTBHOperands(MCInst &Inst, unsigned N) const {
1420 assert(N == 2 && "Invalid number of operands!");
1421 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1422 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1425 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1426 assert(N == 3 && "Invalid number of operands!");
1427 unsigned Val = ARM_AM::getAM2Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add,
1428 Memory.ShiftImm, Memory.ShiftType);
1429 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1430 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1431 Inst.addOperand(MCOperand::CreateImm(Val));
1434 void addT2MemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1435 assert(N == 3 && "Invalid number of operands!");
1436 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1437 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1438 Inst.addOperand(MCOperand::CreateImm(Memory.ShiftImm));
1441 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1442 assert(N == 2 && "Invalid number of operands!");
1443 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1444 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1447 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1448 assert(N == 2 && "Invalid number of operands!");
1449 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 4) : 0;
1450 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1451 Inst.addOperand(MCOperand::CreateImm(Val));
1454 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1455 assert(N == 2 && "Invalid number of operands!");
1456 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 2) : 0;
1457 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1458 Inst.addOperand(MCOperand::CreateImm(Val));
1461 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1462 assert(N == 2 && "Invalid number of operands!");
1463 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue()) : 0;
1464 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1465 Inst.addOperand(MCOperand::CreateImm(Val));
1468 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1469 assert(N == 2 && "Invalid number of operands!");
1470 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 4) : 0;
1471 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1472 Inst.addOperand(MCOperand::CreateImm(Val));
1475 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1476 assert(N == 1 && "Invalid number of operands!");
1477 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1478 assert(CE && "non-constant post-idx-imm8 operand!");
1479 int Imm = CE->getValue();
1480 bool isAdd = Imm >= 0;
1481 if (Imm == INT32_MIN) Imm = 0;
1482 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1483 Inst.addOperand(MCOperand::CreateImm(Imm));
1486 void addPostIdxImm8s4Operands(MCInst &Inst, unsigned N) const {
1487 assert(N == 1 && "Invalid number of operands!");
1488 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1489 assert(CE && "non-constant post-idx-imm8s4 operand!");
1490 int Imm = CE->getValue();
1491 bool isAdd = Imm >= 0;
1492 if (Imm == INT32_MIN) Imm = 0;
1493 // Immediate is scaled by 4.
1494 Imm = ((Imm < 0 ? -Imm : Imm) / 4) | (int)isAdd << 8;
1495 Inst.addOperand(MCOperand::CreateImm(Imm));
1498 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1499 assert(N == 2 && "Invalid number of operands!");
1500 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1501 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1504 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1505 assert(N == 2 && "Invalid number of operands!");
1506 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1507 // The sign, shift type, and shift amount are encoded in a single operand
1508 // using the AM2 encoding helpers.
1509 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1510 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1511 PostIdxReg.ShiftTy);
1512 Inst.addOperand(MCOperand::CreateImm(Imm));
1515 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1516 assert(N == 1 && "Invalid number of operands!");
1517 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1520 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1521 assert(N == 1 && "Invalid number of operands!");
1522 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1525 void addVecListOneDOperands(MCInst &Inst, unsigned N) const {
1526 assert(N == 1 && "Invalid number of operands!");
1527 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1530 void addVecListTwoDOperands(MCInst &Inst, unsigned N) const {
1531 assert(N == 1 && "Invalid number of operands!");
1532 // Only the first register actually goes on the instruction. The rest
1533 // are implied by the opcode.
1534 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1537 void addVecListThreeDOperands(MCInst &Inst, unsigned N) const {
1538 assert(N == 1 && "Invalid number of operands!");
1539 // Only the first register actually goes on the instruction. The rest
1540 // are implied by the opcode.
1541 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1544 void addVecListFourDOperands(MCInst &Inst, unsigned N) const {
1545 assert(N == 1 && "Invalid number of operands!");
1546 // Only the first register actually goes on the instruction. The rest
1547 // are implied by the opcode.
1548 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1551 void addVecListTwoQOperands(MCInst &Inst, unsigned N) const {
1552 assert(N == 1 && "Invalid number of operands!");
1553 // Only the first register actually goes on the instruction. The rest
1554 // are implied by the opcode.
1555 Inst.addOperand(MCOperand::CreateReg(VectorList.RegNum));
1558 void addVectorIndex8Operands(MCInst &Inst, unsigned N) const {
1559 assert(N == 1 && "Invalid number of operands!");
1560 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1563 void addVectorIndex16Operands(MCInst &Inst, unsigned N) const {
1564 assert(N == 1 && "Invalid number of operands!");
1565 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1568 void addVectorIndex32Operands(MCInst &Inst, unsigned N) const {
1569 assert(N == 1 && "Invalid number of operands!");
1570 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1573 void addNEONi8splatOperands(MCInst &Inst, unsigned N) const {
1574 assert(N == 1 && "Invalid number of operands!");
1575 // The immediate encodes the type of constant as well as the value.
1576 // Mask in that this is an i8 splat.
1577 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1578 Inst.addOperand(MCOperand::CreateImm(CE->getValue() | 0xe00));
1581 void addNEONi16splatOperands(MCInst &Inst, unsigned N) const {
1582 assert(N == 1 && "Invalid number of operands!");
1583 // The immediate encodes the type of constant as well as the value.
1584 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1585 unsigned Value = CE->getValue();
1587 Value = (Value >> 8) | 0xa00;
1590 Inst.addOperand(MCOperand::CreateImm(Value));
1593 void addNEONi32splatOperands(MCInst &Inst, unsigned N) const {
1594 assert(N == 1 && "Invalid number of operands!");
1595 // The immediate encodes the type of constant as well as the value.
1596 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1597 unsigned Value = CE->getValue();
1598 if (Value >= 256 && Value <= 0xff00)
1599 Value = (Value >> 8) | 0x200;
1600 else if (Value > 0xffff && Value <= 0xff0000)
1601 Value = (Value >> 16) | 0x400;
1602 else if (Value > 0xffffff)
1603 Value = (Value >> 24) | 0x600;
1604 Inst.addOperand(MCOperand::CreateImm(Value));
1607 void addNEONi32vmovOperands(MCInst &Inst, unsigned N) const {
1608 assert(N == 1 && "Invalid number of operands!");
1609 // The immediate encodes the type of constant as well as the value.
1610 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1611 unsigned Value = CE->getValue();
1612 if (Value >= 256 && Value <= 0xffff)
1613 Value = (Value >> 8) | ((Value & 0xff) ? 0xc00 : 0x200);
1614 else if (Value > 0xffff && Value <= 0xffffff)
1615 Value = (Value >> 16) | ((Value & 0xff) ? 0xd00 : 0x400);
1616 else if (Value > 0xffffff)
1617 Value = (Value >> 24) | 0x600;
1618 Inst.addOperand(MCOperand::CreateImm(Value));
1621 void addNEONi64splatOperands(MCInst &Inst, unsigned N) const {
1622 assert(N == 1 && "Invalid number of operands!");
1623 // The immediate encodes the type of constant as well as the value.
1624 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1625 uint64_t Value = CE->getValue();
1627 for (unsigned i = 0; i < 8; ++i, Value >>= 8) {
1628 Imm |= (Value & 1) << i;
1630 Inst.addOperand(MCOperand::CreateImm(Imm | 0x1e00));
1633 virtual void print(raw_ostream &OS) const;
1635 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1636 ARMOperand *Op = new ARMOperand(k_ITCondMask);
1637 Op->ITMask.Mask = Mask;
1643 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1644 ARMOperand *Op = new ARMOperand(k_CondCode);
1651 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1652 ARMOperand *Op = new ARMOperand(k_CoprocNum);
1653 Op->Cop.Val = CopVal;
1659 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1660 ARMOperand *Op = new ARMOperand(k_CoprocReg);
1661 Op->Cop.Val = CopVal;
1667 static ARMOperand *CreateCoprocOption(unsigned Val, SMLoc S, SMLoc E) {
1668 ARMOperand *Op = new ARMOperand(k_CoprocOption);
1675 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1676 ARMOperand *Op = new ARMOperand(k_CCOut);
1677 Op->Reg.RegNum = RegNum;
1683 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1684 ARMOperand *Op = new ARMOperand(k_Token);
1685 Op->Tok.Data = Str.data();
1686 Op->Tok.Length = Str.size();
1692 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1693 ARMOperand *Op = new ARMOperand(k_Register);
1694 Op->Reg.RegNum = RegNum;
1700 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1705 ARMOperand *Op = new ARMOperand(k_ShiftedRegister);
1706 Op->RegShiftedReg.ShiftTy = ShTy;
1707 Op->RegShiftedReg.SrcReg = SrcReg;
1708 Op->RegShiftedReg.ShiftReg = ShiftReg;
1709 Op->RegShiftedReg.ShiftImm = ShiftImm;
1715 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1719 ARMOperand *Op = new ARMOperand(k_ShiftedImmediate);
1720 Op->RegShiftedImm.ShiftTy = ShTy;
1721 Op->RegShiftedImm.SrcReg = SrcReg;
1722 Op->RegShiftedImm.ShiftImm = ShiftImm;
1728 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1730 ARMOperand *Op = new ARMOperand(k_ShifterImmediate);
1731 Op->ShifterImm.isASR = isASR;
1732 Op->ShifterImm.Imm = Imm;
1738 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1739 ARMOperand *Op = new ARMOperand(k_RotateImmediate);
1740 Op->RotImm.Imm = Imm;
1746 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1748 ARMOperand *Op = new ARMOperand(k_BitfieldDescriptor);
1749 Op->Bitfield.LSB = LSB;
1750 Op->Bitfield.Width = Width;
1757 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1758 SMLoc StartLoc, SMLoc EndLoc) {
1759 KindTy Kind = k_RegisterList;
1761 if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Regs.front().first))
1762 Kind = k_DPRRegisterList;
1763 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].
1764 contains(Regs.front().first))
1765 Kind = k_SPRRegisterList;
1767 ARMOperand *Op = new ARMOperand(Kind);
1768 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1769 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1770 Op->Registers.push_back(I->first);
1771 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1772 Op->StartLoc = StartLoc;
1773 Op->EndLoc = EndLoc;
1777 static ARMOperand *CreateVectorList(unsigned RegNum, unsigned Count,
1779 ARMOperand *Op = new ARMOperand(k_VectorList);
1780 Op->VectorList.RegNum = RegNum;
1781 Op->VectorList.Count = Count;
1787 static ARMOperand *CreateVectorIndex(unsigned Idx, SMLoc S, SMLoc E,
1789 ARMOperand *Op = new ARMOperand(k_VectorIndex);
1790 Op->VectorIndex.Val = Idx;
1796 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1797 ARMOperand *Op = new ARMOperand(k_Immediate);
1804 static ARMOperand *CreateFPImm(unsigned Val, SMLoc S, MCContext &Ctx) {
1805 ARMOperand *Op = new ARMOperand(k_FPImmediate);
1806 Op->FPImm.Val = Val;
1812 static ARMOperand *CreateMem(unsigned BaseRegNum,
1813 const MCConstantExpr *OffsetImm,
1814 unsigned OffsetRegNum,
1815 ARM_AM::ShiftOpc ShiftType,
1820 ARMOperand *Op = new ARMOperand(k_Memory);
1821 Op->Memory.BaseRegNum = BaseRegNum;
1822 Op->Memory.OffsetImm = OffsetImm;
1823 Op->Memory.OffsetRegNum = OffsetRegNum;
1824 Op->Memory.ShiftType = ShiftType;
1825 Op->Memory.ShiftImm = ShiftImm;
1826 Op->Memory.Alignment = Alignment;
1827 Op->Memory.isNegative = isNegative;
1833 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1834 ARM_AM::ShiftOpc ShiftTy,
1837 ARMOperand *Op = new ARMOperand(k_PostIndexRegister);
1838 Op->PostIdxReg.RegNum = RegNum;
1839 Op->PostIdxReg.isAdd = isAdd;
1840 Op->PostIdxReg.ShiftTy = ShiftTy;
1841 Op->PostIdxReg.ShiftImm = ShiftImm;
1847 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1848 ARMOperand *Op = new ARMOperand(k_MemBarrierOpt);
1849 Op->MBOpt.Val = Opt;
1855 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1856 ARMOperand *Op = new ARMOperand(k_ProcIFlags);
1857 Op->IFlags.Val = IFlags;
1863 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1864 ARMOperand *Op = new ARMOperand(k_MSRMask);
1865 Op->MMask.Val = MMask;
1872 } // end anonymous namespace.
1874 void ARMOperand::print(raw_ostream &OS) const {
1877 OS << "<fpimm " << getFPImm() << "(" << ARM_AM::getFPImmFloat(getFPImm())
1881 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1884 OS << "<ccout " << getReg() << ">";
1886 case k_ITCondMask: {
1887 static const char *MaskStr[] = {
1888 "()", "(t)", "(e)", "(tt)", "(et)", "(te)", "(ee)", "(ttt)", "(ett)",
1889 "(tet)", "(eet)", "(tte)", "(ete)", "(tee)", "(eee)"
1891 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1892 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1896 OS << "<coprocessor number: " << getCoproc() << ">";
1899 OS << "<coprocessor register: " << getCoproc() << ">";
1901 case k_CoprocOption:
1902 OS << "<coprocessor option: " << CoprocOption.Val << ">";
1905 OS << "<mask: " << getMSRMask() << ">";
1908 getImm()->print(OS);
1910 case k_MemBarrierOpt:
1911 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1915 << " base:" << Memory.BaseRegNum;
1918 case k_PostIndexRegister:
1919 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1920 << PostIdxReg.RegNum;
1921 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1922 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1923 << PostIdxReg.ShiftImm;
1926 case k_ProcIFlags: {
1927 OS << "<ARM_PROC::";
1928 unsigned IFlags = getProcIFlags();
1929 for (int i=2; i >= 0; --i)
1930 if (IFlags & (1 << i))
1931 OS << ARM_PROC::IFlagsToString(1 << i);
1936 OS << "<register " << getReg() << ">";
1938 case k_ShifterImmediate:
1939 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1940 << " #" << ShifterImm.Imm << ">";
1942 case k_ShiftedRegister:
1943 OS << "<so_reg_reg "
1944 << RegShiftedReg.SrcReg
1945 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1946 << ", " << RegShiftedReg.ShiftReg << ", "
1947 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1950 case k_ShiftedImmediate:
1951 OS << "<so_reg_imm "
1952 << RegShiftedImm.SrcReg
1953 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1954 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1957 case k_RotateImmediate:
1958 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1960 case k_BitfieldDescriptor:
1961 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1962 << ", width: " << Bitfield.Width << ">";
1964 case k_RegisterList:
1965 case k_DPRRegisterList:
1966 case k_SPRRegisterList: {
1967 OS << "<register_list ";
1969 const SmallVectorImpl<unsigned> &RegList = getRegList();
1970 for (SmallVectorImpl<unsigned>::const_iterator
1971 I = RegList.begin(), E = RegList.end(); I != E; ) {
1973 if (++I < E) OS << ", ";
1980 OS << "<vector_list " << VectorList.Count << " * "
1981 << VectorList.RegNum << ">";
1984 OS << "'" << getToken() << "'";
1987 OS << "<vectorindex " << getVectorIndex() << ">";
1992 /// @name Auto-generated Match Functions
1995 static unsigned MatchRegisterName(StringRef Name);
1999 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
2000 SMLoc &StartLoc, SMLoc &EndLoc) {
2001 RegNo = tryParseRegister();
2003 return (RegNo == (unsigned)-1);
2006 /// Try to parse a register name. The token must be an Identifier when called,
2007 /// and if it is a register name the token is eaten and the register number is
2008 /// returned. Otherwise return -1.
2010 int ARMAsmParser::tryParseRegister() {
2011 const AsmToken &Tok = Parser.getTok();
2012 if (Tok.isNot(AsmToken::Identifier)) return -1;
2014 // FIXME: Validate register for the current architecture; we have to do
2015 // validation later, so maybe there is no need for this here.
2016 std::string upperCase = Tok.getString().str();
2017 std::string lowerCase = LowercaseString(upperCase);
2018 unsigned RegNum = MatchRegisterName(lowerCase);
2020 RegNum = StringSwitch<unsigned>(lowerCase)
2021 .Case("r13", ARM::SP)
2022 .Case("r14", ARM::LR)
2023 .Case("r15", ARM::PC)
2024 .Case("ip", ARM::R12)
2027 if (!RegNum) return -1;
2029 Parser.Lex(); // Eat identifier token.
2034 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
2035 // If a recoverable error occurs, return 1. If an irrecoverable error
2036 // occurs, return -1. An irrecoverable error is one where tokens have been
2037 // consumed in the process of trying to parse the shifter (i.e., when it is
2038 // indeed a shifter operand, but malformed).
2039 int ARMAsmParser::tryParseShiftRegister(
2040 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2041 SMLoc S = Parser.getTok().getLoc();
2042 const AsmToken &Tok = Parser.getTok();
2043 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2045 std::string upperCase = Tok.getString().str();
2046 std::string lowerCase = LowercaseString(upperCase);
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 /// Parse a register list.
2355 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2356 assert(Parser.getTok().is(AsmToken::LCurly) &&
2357 "Token is not a Left Curly Brace");
2358 SMLoc S = Parser.getTok().getLoc();
2359 Parser.Lex(); // Eat '{' token.
2360 SMLoc RegLoc = Parser.getTok().getLoc();
2362 // Check the first register in the list to see what register class
2363 // this is a list of.
2364 int Reg = tryParseRegister();
2366 return Error(RegLoc, "register expected");
2368 const MCRegisterClass *RC;
2369 if (ARMMCRegisterClasses[ARM::GPRRegClassID].contains(Reg))
2370 RC = &ARMMCRegisterClasses[ARM::GPRRegClassID];
2371 else if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg))
2372 RC = &ARMMCRegisterClasses[ARM::DPRRegClassID];
2373 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].contains(Reg))
2374 RC = &ARMMCRegisterClasses[ARM::SPRRegClassID];
2376 return Error(RegLoc, "invalid register in register list");
2378 // The reglist instructions have at most 16 registers, so reserve
2379 // space for that many.
2380 SmallVector<std::pair<unsigned, SMLoc>, 16> Registers;
2381 // Store the first register.
2382 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2384 // This starts immediately after the first register token in the list,
2385 // so we can see either a comma or a minus (range separator) as a legal
2387 while (Parser.getTok().is(AsmToken::Comma) ||
2388 Parser.getTok().is(AsmToken::Minus)) {
2389 if (Parser.getTok().is(AsmToken::Minus)) {
2390 Parser.Lex(); // Eat the comma.
2391 SMLoc EndLoc = Parser.getTok().getLoc();
2392 int EndReg = tryParseRegister();
2394 return Error(EndLoc, "register expected");
2395 // If the register is the same as the start reg, there's nothing
2399 // The register must be in the same register class as the first.
2400 if (!RC->contains(EndReg))
2401 return Error(EndLoc, "invalid register in register list");
2402 // Ranges must go from low to high.
2403 if (getARMRegisterNumbering(Reg) > getARMRegisterNumbering(EndReg))
2404 return Error(EndLoc, "bad range in register list");
2406 // Add all the registers in the range to the register list.
2407 while (Reg != EndReg) {
2408 Reg = getNextRegister(Reg);
2409 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2413 Parser.Lex(); // Eat the comma.
2414 RegLoc = Parser.getTok().getLoc();
2416 Reg = tryParseRegister();
2418 return Error(RegLoc, "register expected");
2419 // The register must be in the same register class as the first.
2420 if (!RC->contains(Reg))
2421 return Error(RegLoc, "invalid register in register list");
2422 // List must be monotonically increasing.
2423 if (getARMRegisterNumbering(Reg) <= getARMRegisterNumbering(OldReg))
2424 return Error(RegLoc, "register list not in ascending order");
2425 // VFP register lists must also be contiguous.
2426 // It's OK to use the enumeration values directly here rather, as the
2427 // VFP register classes have the enum sorted properly.
2428 if (RC != &ARMMCRegisterClasses[ARM::GPRRegClassID] &&
2430 return Error(RegLoc, "non-contiguous register range");
2431 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2434 SMLoc E = Parser.getTok().getLoc();
2435 if (Parser.getTok().isNot(AsmToken::RCurly))
2436 return Error(E, "'}' expected");
2437 Parser.Lex(); // Eat '}' token.
2439 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
2443 // Return the low-subreg of a given Q register.
2444 static unsigned getDRegFromQReg(unsigned QReg) {
2446 default: llvm_unreachable("expected a Q register!");
2447 case ARM::Q0: return ARM::D0;
2448 case ARM::Q1: return ARM::D2;
2449 case ARM::Q2: return ARM::D4;
2450 case ARM::Q3: return ARM::D6;
2451 case ARM::Q4: return ARM::D8;
2452 case ARM::Q5: return ARM::D10;
2453 case ARM::Q6: return ARM::D12;
2454 case ARM::Q7: return ARM::D14;
2455 case ARM::Q8: return ARM::D16;
2456 case ARM::Q9: return ARM::D19;
2457 case ARM::Q10: return ARM::D20;
2458 case ARM::Q11: return ARM::D22;
2459 case ARM::Q12: return ARM::D24;
2460 case ARM::Q13: return ARM::D26;
2461 case ARM::Q14: return ARM::D28;
2462 case ARM::Q15: return ARM::D30;
2466 // parse a vector register list
2467 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2468 parseVectorList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2469 if(Parser.getTok().isNot(AsmToken::LCurly))
2470 return MatchOperand_NoMatch;
2472 SMLoc S = Parser.getTok().getLoc();
2473 Parser.Lex(); // Eat '{' token.
2474 SMLoc RegLoc = Parser.getTok().getLoc();
2476 int Reg = tryParseRegister();
2478 Error(RegLoc, "register expected");
2479 return MatchOperand_ParseFail;
2482 unsigned FirstReg = Reg;
2483 // The list is of D registers, but we also allow Q regs and just interpret
2484 // them as the two D sub-registers.
2485 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2486 FirstReg = Reg = getDRegFromQReg(Reg);
2491 while (Parser.getTok().is(AsmToken::Comma)) {
2492 Parser.Lex(); // Eat the comma.
2493 RegLoc = Parser.getTok().getLoc();
2495 Reg = tryParseRegister();
2497 Error(RegLoc, "register expected");
2498 return MatchOperand_ParseFail;
2500 // vector register lists must be contiguous.
2501 // It's OK to use the enumeration values directly here rather, as the
2502 // VFP register classes have the enum sorted properly.
2504 // The list is of D registers, but we also allow Q regs and just interpret
2505 // them as the two D sub-registers.
2506 if (ARMMCRegisterClasses[ARM::QPRRegClassID].contains(Reg)) {
2507 Reg = getDRegFromQReg(Reg);
2508 if (Reg != OldReg + 1) {
2509 Error(RegLoc, "non-contiguous register range");
2510 return MatchOperand_ParseFail;
2516 // Normal D register. Just check that it's contiguous and keep going.
2517 if (Reg != OldReg + 1) {
2518 Error(RegLoc, "non-contiguous register range");
2519 return MatchOperand_ParseFail;
2524 SMLoc E = Parser.getTok().getLoc();
2525 if (Parser.getTok().isNot(AsmToken::RCurly)) {
2526 Error(E, "'}' expected");
2527 return MatchOperand_ParseFail;
2529 Parser.Lex(); // Eat '}' token.
2531 Operands.push_back(ARMOperand::CreateVectorList(FirstReg, Count, S, E));
2532 return MatchOperand_Success;
2535 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
2536 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2537 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2538 SMLoc S = Parser.getTok().getLoc();
2539 const AsmToken &Tok = Parser.getTok();
2540 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2541 StringRef OptStr = Tok.getString();
2543 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
2544 .Case("sy", ARM_MB::SY)
2545 .Case("st", ARM_MB::ST)
2546 .Case("sh", ARM_MB::ISH)
2547 .Case("ish", ARM_MB::ISH)
2548 .Case("shst", ARM_MB::ISHST)
2549 .Case("ishst", ARM_MB::ISHST)
2550 .Case("nsh", ARM_MB::NSH)
2551 .Case("un", ARM_MB::NSH)
2552 .Case("nshst", ARM_MB::NSHST)
2553 .Case("unst", ARM_MB::NSHST)
2554 .Case("osh", ARM_MB::OSH)
2555 .Case("oshst", ARM_MB::OSHST)
2559 return MatchOperand_NoMatch;
2561 Parser.Lex(); // Eat identifier token.
2562 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
2563 return MatchOperand_Success;
2566 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
2567 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2568 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2569 SMLoc S = Parser.getTok().getLoc();
2570 const AsmToken &Tok = Parser.getTok();
2571 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2572 StringRef IFlagsStr = Tok.getString();
2574 // An iflags string of "none" is interpreted to mean that none of the AIF
2575 // bits are set. Not a terribly useful instruction, but a valid encoding.
2576 unsigned IFlags = 0;
2577 if (IFlagsStr != "none") {
2578 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
2579 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
2580 .Case("a", ARM_PROC::A)
2581 .Case("i", ARM_PROC::I)
2582 .Case("f", ARM_PROC::F)
2585 // If some specific iflag is already set, it means that some letter is
2586 // present more than once, this is not acceptable.
2587 if (Flag == ~0U || (IFlags & Flag))
2588 return MatchOperand_NoMatch;
2594 Parser.Lex(); // Eat identifier token.
2595 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
2596 return MatchOperand_Success;
2599 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
2600 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2601 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2602 SMLoc S = Parser.getTok().getLoc();
2603 const AsmToken &Tok = Parser.getTok();
2604 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2605 StringRef Mask = Tok.getString();
2608 // See ARMv6-M 10.1.1
2609 unsigned FlagsVal = StringSwitch<unsigned>(Mask)
2619 .Case("primask", 16)
2620 .Case("basepri", 17)
2621 .Case("basepri_max", 18)
2622 .Case("faultmask", 19)
2623 .Case("control", 20)
2626 if (FlagsVal == ~0U)
2627 return MatchOperand_NoMatch;
2629 if (!hasV7Ops() && FlagsVal >= 17 && FlagsVal <= 19)
2630 // basepri, basepri_max and faultmask only valid for V7m.
2631 return MatchOperand_NoMatch;
2633 Parser.Lex(); // Eat identifier token.
2634 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2635 return MatchOperand_Success;
2638 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
2639 size_t Start = 0, Next = Mask.find('_');
2640 StringRef Flags = "";
2641 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
2642 if (Next != StringRef::npos)
2643 Flags = Mask.slice(Next+1, Mask.size());
2645 // FlagsVal contains the complete mask:
2647 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2648 unsigned FlagsVal = 0;
2650 if (SpecReg == "apsr") {
2651 FlagsVal = StringSwitch<unsigned>(Flags)
2652 .Case("nzcvq", 0x8) // same as CPSR_f
2653 .Case("g", 0x4) // same as CPSR_s
2654 .Case("nzcvqg", 0xc) // same as CPSR_fs
2657 if (FlagsVal == ~0U) {
2659 return MatchOperand_NoMatch;
2661 FlagsVal = 8; // No flag
2663 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
2664 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
2666 for (int i = 0, e = Flags.size(); i != e; ++i) {
2667 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
2674 // If some specific flag is already set, it means that some letter is
2675 // present more than once, this is not acceptable.
2676 if (FlagsVal == ~0U || (FlagsVal & Flag))
2677 return MatchOperand_NoMatch;
2680 } else // No match for special register.
2681 return MatchOperand_NoMatch;
2683 // Special register without flags is NOT equivalent to "fc" flags.
2684 // NOTE: This is a divergence from gas' behavior. Uncommenting the following
2685 // two lines would enable gas compatibility at the expense of breaking
2691 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2692 if (SpecReg == "spsr")
2695 Parser.Lex(); // Eat identifier token.
2696 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2697 return MatchOperand_Success;
2700 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2701 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
2702 int Low, int High) {
2703 const AsmToken &Tok = Parser.getTok();
2704 if (Tok.isNot(AsmToken::Identifier)) {
2705 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2706 return MatchOperand_ParseFail;
2708 StringRef ShiftName = Tok.getString();
2709 std::string LowerOp = LowercaseString(Op);
2710 std::string UpperOp = UppercaseString(Op);
2711 if (ShiftName != LowerOp && ShiftName != UpperOp) {
2712 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2713 return MatchOperand_ParseFail;
2715 Parser.Lex(); // Eat shift type token.
2717 // There must be a '#' and a shift amount.
2718 if (Parser.getTok().isNot(AsmToken::Hash)) {
2719 Error(Parser.getTok().getLoc(), "'#' expected");
2720 return MatchOperand_ParseFail;
2722 Parser.Lex(); // Eat hash token.
2724 const MCExpr *ShiftAmount;
2725 SMLoc Loc = Parser.getTok().getLoc();
2726 if (getParser().ParseExpression(ShiftAmount)) {
2727 Error(Loc, "illegal expression");
2728 return MatchOperand_ParseFail;
2730 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2732 Error(Loc, "constant expression expected");
2733 return MatchOperand_ParseFail;
2735 int Val = CE->getValue();
2736 if (Val < Low || Val > High) {
2737 Error(Loc, "immediate value out of range");
2738 return MatchOperand_ParseFail;
2741 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
2743 return MatchOperand_Success;
2746 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2747 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2748 const AsmToken &Tok = Parser.getTok();
2749 SMLoc S = Tok.getLoc();
2750 if (Tok.isNot(AsmToken::Identifier)) {
2751 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2752 return MatchOperand_ParseFail;
2754 int Val = StringSwitch<int>(Tok.getString())
2758 Parser.Lex(); // Eat the token.
2761 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2762 return MatchOperand_ParseFail;
2764 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
2766 S, Parser.getTok().getLoc()));
2767 return MatchOperand_Success;
2770 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
2771 /// instructions. Legal values are:
2772 /// lsl #n 'n' in [0,31]
2773 /// asr #n 'n' in [1,32]
2774 /// n == 32 encoded as n == 0.
2775 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2776 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2777 const AsmToken &Tok = Parser.getTok();
2778 SMLoc S = Tok.getLoc();
2779 if (Tok.isNot(AsmToken::Identifier)) {
2780 Error(S, "shift operator 'asr' or 'lsl' expected");
2781 return MatchOperand_ParseFail;
2783 StringRef ShiftName = Tok.getString();
2785 if (ShiftName == "lsl" || ShiftName == "LSL")
2787 else if (ShiftName == "asr" || ShiftName == "ASR")
2790 Error(S, "shift operator 'asr' or 'lsl' expected");
2791 return MatchOperand_ParseFail;
2793 Parser.Lex(); // Eat the operator.
2795 // A '#' and a shift amount.
2796 if (Parser.getTok().isNot(AsmToken::Hash)) {
2797 Error(Parser.getTok().getLoc(), "'#' expected");
2798 return MatchOperand_ParseFail;
2800 Parser.Lex(); // Eat hash token.
2802 const MCExpr *ShiftAmount;
2803 SMLoc E = Parser.getTok().getLoc();
2804 if (getParser().ParseExpression(ShiftAmount)) {
2805 Error(E, "malformed shift expression");
2806 return MatchOperand_ParseFail;
2808 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2810 Error(E, "shift amount must be an immediate");
2811 return MatchOperand_ParseFail;
2814 int64_t Val = CE->getValue();
2816 // Shift amount must be in [1,32]
2817 if (Val < 1 || Val > 32) {
2818 Error(E, "'asr' shift amount must be in range [1,32]");
2819 return MatchOperand_ParseFail;
2821 // asr #32 encoded as asr #0, but is not allowed in Thumb2 mode.
2822 if (isThumb() && Val == 32) {
2823 Error(E, "'asr #32' shift amount not allowed in Thumb mode");
2824 return MatchOperand_ParseFail;
2826 if (Val == 32) Val = 0;
2828 // Shift amount must be in [1,32]
2829 if (Val < 0 || Val > 31) {
2830 Error(E, "'lsr' shift amount must be in range [0,31]");
2831 return MatchOperand_ParseFail;
2835 E = Parser.getTok().getLoc();
2836 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2838 return MatchOperand_Success;
2841 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2842 /// of instructions. Legal values are:
2843 /// ror #n 'n' in {0, 8, 16, 24}
2844 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2845 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2846 const AsmToken &Tok = Parser.getTok();
2847 SMLoc S = Tok.getLoc();
2848 if (Tok.isNot(AsmToken::Identifier))
2849 return MatchOperand_NoMatch;
2850 StringRef ShiftName = Tok.getString();
2851 if (ShiftName != "ror" && ShiftName != "ROR")
2852 return MatchOperand_NoMatch;
2853 Parser.Lex(); // Eat the operator.
2855 // A '#' and a rotate amount.
2856 if (Parser.getTok().isNot(AsmToken::Hash)) {
2857 Error(Parser.getTok().getLoc(), "'#' expected");
2858 return MatchOperand_ParseFail;
2860 Parser.Lex(); // Eat hash token.
2862 const MCExpr *ShiftAmount;
2863 SMLoc E = Parser.getTok().getLoc();
2864 if (getParser().ParseExpression(ShiftAmount)) {
2865 Error(E, "malformed rotate expression");
2866 return MatchOperand_ParseFail;
2868 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2870 Error(E, "rotate amount must be an immediate");
2871 return MatchOperand_ParseFail;
2874 int64_t Val = CE->getValue();
2875 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2876 // normally, zero is represented in asm by omitting the rotate operand
2878 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2879 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2880 return MatchOperand_ParseFail;
2883 E = Parser.getTok().getLoc();
2884 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2886 return MatchOperand_Success;
2889 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2890 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2891 SMLoc S = Parser.getTok().getLoc();
2892 // The bitfield descriptor is really two operands, the LSB and the width.
2893 if (Parser.getTok().isNot(AsmToken::Hash)) {
2894 Error(Parser.getTok().getLoc(), "'#' expected");
2895 return MatchOperand_ParseFail;
2897 Parser.Lex(); // Eat hash token.
2899 const MCExpr *LSBExpr;
2900 SMLoc E = Parser.getTok().getLoc();
2901 if (getParser().ParseExpression(LSBExpr)) {
2902 Error(E, "malformed immediate expression");
2903 return MatchOperand_ParseFail;
2905 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2907 Error(E, "'lsb' operand must be an immediate");
2908 return MatchOperand_ParseFail;
2911 int64_t LSB = CE->getValue();
2912 // The LSB must be in the range [0,31]
2913 if (LSB < 0 || LSB > 31) {
2914 Error(E, "'lsb' operand must be in the range [0,31]");
2915 return MatchOperand_ParseFail;
2917 E = Parser.getTok().getLoc();
2919 // Expect another immediate operand.
2920 if (Parser.getTok().isNot(AsmToken::Comma)) {
2921 Error(Parser.getTok().getLoc(), "too few operands");
2922 return MatchOperand_ParseFail;
2924 Parser.Lex(); // Eat hash token.
2925 if (Parser.getTok().isNot(AsmToken::Hash)) {
2926 Error(Parser.getTok().getLoc(), "'#' expected");
2927 return MatchOperand_ParseFail;
2929 Parser.Lex(); // Eat hash token.
2931 const MCExpr *WidthExpr;
2932 if (getParser().ParseExpression(WidthExpr)) {
2933 Error(E, "malformed immediate expression");
2934 return MatchOperand_ParseFail;
2936 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2938 Error(E, "'width' operand must be an immediate");
2939 return MatchOperand_ParseFail;
2942 int64_t Width = CE->getValue();
2943 // The LSB must be in the range [1,32-lsb]
2944 if (Width < 1 || Width > 32 - LSB) {
2945 Error(E, "'width' operand must be in the range [1,32-lsb]");
2946 return MatchOperand_ParseFail;
2948 E = Parser.getTok().getLoc();
2950 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2952 return MatchOperand_Success;
2955 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2956 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2957 // Check for a post-index addressing register operand. Specifically:
2958 // postidx_reg := '+' register {, shift}
2959 // | '-' register {, shift}
2960 // | register {, shift}
2962 // This method must return MatchOperand_NoMatch without consuming any tokens
2963 // in the case where there is no match, as other alternatives take other
2965 AsmToken Tok = Parser.getTok();
2966 SMLoc S = Tok.getLoc();
2967 bool haveEaten = false;
2970 if (Tok.is(AsmToken::Plus)) {
2971 Parser.Lex(); // Eat the '+' token.
2973 } else if (Tok.is(AsmToken::Minus)) {
2974 Parser.Lex(); // Eat the '-' token.
2978 if (Parser.getTok().is(AsmToken::Identifier))
2979 Reg = tryParseRegister();
2982 return MatchOperand_NoMatch;
2983 Error(Parser.getTok().getLoc(), "register expected");
2984 return MatchOperand_ParseFail;
2986 SMLoc E = Parser.getTok().getLoc();
2988 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2989 unsigned ShiftImm = 0;
2990 if (Parser.getTok().is(AsmToken::Comma)) {
2991 Parser.Lex(); // Eat the ','.
2992 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2993 return MatchOperand_ParseFail;
2996 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2999 return MatchOperand_Success;
3002 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
3003 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3004 // Check for a post-index addressing register operand. Specifically:
3005 // am3offset := '+' register
3012 // This method must return MatchOperand_NoMatch without consuming any tokens
3013 // in the case where there is no match, as other alternatives take other
3015 AsmToken Tok = Parser.getTok();
3016 SMLoc S = Tok.getLoc();
3018 // Do immediates first, as we always parse those if we have a '#'.
3019 if (Parser.getTok().is(AsmToken::Hash)) {
3020 Parser.Lex(); // Eat the '#'.
3021 // Explicitly look for a '-', as we need to encode negative zero
3023 bool isNegative = Parser.getTok().is(AsmToken::Minus);
3024 const MCExpr *Offset;
3025 if (getParser().ParseExpression(Offset))
3026 return MatchOperand_ParseFail;
3027 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
3029 Error(S, "constant expression expected");
3030 return MatchOperand_ParseFail;
3032 SMLoc E = Tok.getLoc();
3033 // Negative zero is encoded as the flag value INT32_MIN.
3034 int32_t Val = CE->getValue();
3035 if (isNegative && Val == 0)
3039 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
3041 return MatchOperand_Success;
3045 bool haveEaten = false;
3048 if (Tok.is(AsmToken::Plus)) {
3049 Parser.Lex(); // Eat the '+' token.
3051 } else if (Tok.is(AsmToken::Minus)) {
3052 Parser.Lex(); // Eat the '-' token.
3056 if (Parser.getTok().is(AsmToken::Identifier))
3057 Reg = tryParseRegister();
3060 return MatchOperand_NoMatch;
3061 Error(Parser.getTok().getLoc(), "register expected");
3062 return MatchOperand_ParseFail;
3064 SMLoc E = Parser.getTok().getLoc();
3066 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
3069 return MatchOperand_Success;
3072 /// cvtT2LdrdPre - Convert parsed operands to MCInst.
3073 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3074 /// when they refer multiple MIOperands inside a single one.
3076 cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
3077 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3079 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3080 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3081 // Create a writeback register dummy placeholder.
3082 Inst.addOperand(MCOperand::CreateReg(0));
3084 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
3086 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3090 /// cvtT2StrdPre - Convert parsed operands to MCInst.
3091 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3092 /// when they refer multiple MIOperands inside a single one.
3094 cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
3095 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3096 // Create a writeback register dummy placeholder.
3097 Inst.addOperand(MCOperand::CreateReg(0));
3099 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3100 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3102 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
3104 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3108 /// cvtLdWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
3109 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3110 /// when they refer multiple MIOperands inside a single one.
3112 cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
3113 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3114 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3116 // Create a writeback register dummy placeholder.
3117 Inst.addOperand(MCOperand::CreateImm(0));
3119 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
3120 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3124 /// cvtStWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
3125 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3126 /// when they refer multiple MIOperands inside a single one.
3128 cvtStWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
3129 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3130 // Create a writeback register dummy placeholder.
3131 Inst.addOperand(MCOperand::CreateImm(0));
3132 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3133 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
3134 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3138 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
3139 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3140 /// when they refer multiple MIOperands inside a single one.
3142 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
3143 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3144 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3146 // Create a writeback register dummy placeholder.
3147 Inst.addOperand(MCOperand::CreateImm(0));
3149 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
3150 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3154 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
3155 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3156 /// when they refer multiple MIOperands inside a single one.
3158 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
3159 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3160 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3162 // Create a writeback register dummy placeholder.
3163 Inst.addOperand(MCOperand::CreateImm(0));
3165 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
3166 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3171 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
3172 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3173 /// when they refer multiple MIOperands inside a single one.
3175 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
3176 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3177 // Create a writeback register dummy placeholder.
3178 Inst.addOperand(MCOperand::CreateImm(0));
3179 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3180 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
3181 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3185 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
3186 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3187 /// when they refer multiple MIOperands inside a single one.
3189 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
3190 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3191 // Create a writeback register dummy placeholder.
3192 Inst.addOperand(MCOperand::CreateImm(0));
3193 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3194 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
3195 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3199 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
3200 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3201 /// when they refer multiple MIOperands inside a single one.
3203 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
3204 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3205 // Create a writeback register dummy placeholder.
3206 Inst.addOperand(MCOperand::CreateImm(0));
3207 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3208 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
3209 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3213 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
3214 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3215 /// when they refer multiple MIOperands inside a single one.
3217 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
3218 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3220 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3221 // Create a writeback register dummy placeholder.
3222 Inst.addOperand(MCOperand::CreateImm(0));
3224 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3226 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
3228 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3232 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
3233 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3234 /// when they refer multiple MIOperands inside a single one.
3236 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
3237 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3239 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3240 // Create a writeback register dummy placeholder.
3241 Inst.addOperand(MCOperand::CreateImm(0));
3243 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3245 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
3247 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3251 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
3252 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3253 /// when they refer multiple MIOperands inside a single one.
3255 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
3256 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3257 // Create a writeback register dummy placeholder.
3258 Inst.addOperand(MCOperand::CreateImm(0));
3260 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3262 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3264 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
3266 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3270 /// cvtStExtTWriteBackReg - 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 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
3275 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3276 // Create a writeback register dummy placeholder.
3277 Inst.addOperand(MCOperand::CreateImm(0));
3279 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3281 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3283 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
3285 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3289 /// cvtLdrdPre - Convert parsed operands to MCInst.
3290 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3291 /// when they refer multiple MIOperands inside a single one.
3293 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
3294 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3296 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3297 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3298 // Create a writeback register dummy placeholder.
3299 Inst.addOperand(MCOperand::CreateImm(0));
3301 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3303 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3307 /// cvtStrdPre - Convert parsed operands to MCInst.
3308 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3309 /// when they refer multiple MIOperands inside a single one.
3311 cvtStrdPre(MCInst &Inst, unsigned Opcode,
3312 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3313 // Create a writeback register dummy placeholder.
3314 Inst.addOperand(MCOperand::CreateImm(0));
3316 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3317 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3319 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3321 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3325 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
3326 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3327 /// when they refer multiple MIOperands inside a single one.
3329 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
3330 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3331 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3332 // Create a writeback register dummy placeholder.
3333 Inst.addOperand(MCOperand::CreateImm(0));
3334 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
3335 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3339 /// cvtThumbMultiple- Convert parsed operands to MCInst.
3340 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3341 /// when they refer multiple MIOperands inside a single one.
3343 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
3344 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3345 // The second source operand must be the same register as the destination
3347 if (Operands.size() == 6 &&
3348 (((ARMOperand*)Operands[3])->getReg() !=
3349 ((ARMOperand*)Operands[5])->getReg()) &&
3350 (((ARMOperand*)Operands[3])->getReg() !=
3351 ((ARMOperand*)Operands[4])->getReg())) {
3352 Error(Operands[3]->getStartLoc(),
3353 "destination register must match source register");
3356 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3357 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
3358 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
3359 // If we have a three-operand form, use that, else the second source operand
3360 // is just the destination operand again.
3361 if (Operands.size() == 6)
3362 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
3364 Inst.addOperand(Inst.getOperand(0));
3365 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
3371 cvtVLDwbFixed(MCInst &Inst, unsigned Opcode,
3372 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3374 ((ARMOperand*)Operands[3])->addVecListTwoDOperands(Inst, 1);
3375 // Create a writeback register dummy placeholder.
3376 Inst.addOperand(MCOperand::CreateImm(0));
3378 ((ARMOperand*)Operands[4])->addAlignedMemoryOperands(Inst, 2);
3380 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3385 cvtVLDwbRegister(MCInst &Inst, unsigned Opcode,
3386 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3388 ((ARMOperand*)Operands[3])->addVecListTwoDOperands(Inst, 1);
3389 // Create a writeback register dummy placeholder.
3390 Inst.addOperand(MCOperand::CreateImm(0));
3392 ((ARMOperand*)Operands[4])->addAlignedMemoryOperands(Inst, 2);
3394 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
3396 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3400 /// Parse an ARM memory expression, return false if successful else return true
3401 /// or an error. The first token must be a '[' when called.
3403 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3405 assert(Parser.getTok().is(AsmToken::LBrac) &&
3406 "Token is not a Left Bracket");
3407 S = Parser.getTok().getLoc();
3408 Parser.Lex(); // Eat left bracket token.
3410 const AsmToken &BaseRegTok = Parser.getTok();
3411 int BaseRegNum = tryParseRegister();
3412 if (BaseRegNum == -1)
3413 return Error(BaseRegTok.getLoc(), "register expected");
3415 // The next token must either be a comma or a closing bracket.
3416 const AsmToken &Tok = Parser.getTok();
3417 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
3418 return Error(Tok.getLoc(), "malformed memory operand");
3420 if (Tok.is(AsmToken::RBrac)) {
3422 Parser.Lex(); // Eat right bracket token.
3424 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
3425 0, 0, false, S, E));
3427 // If there's a pre-indexing writeback marker, '!', just add it as a token
3428 // operand. It's rather odd, but syntactically valid.
3429 if (Parser.getTok().is(AsmToken::Exclaim)) {
3430 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3431 Parser.Lex(); // Eat the '!'.
3437 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
3438 Parser.Lex(); // Eat the comma.
3440 // If we have a ':', it's an alignment specifier.
3441 if (Parser.getTok().is(AsmToken::Colon)) {
3442 Parser.Lex(); // Eat the ':'.
3443 E = Parser.getTok().getLoc();
3446 if (getParser().ParseExpression(Expr))
3449 // The expression has to be a constant. Memory references with relocations
3450 // don't come through here, as they use the <label> forms of the relevant
3452 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3454 return Error (E, "constant expression expected");
3457 switch (CE->getValue()) {
3459 return Error(E, "alignment specifier must be 64, 128, or 256 bits");
3460 case 64: Align = 8; break;
3461 case 128: Align = 16; break;
3462 case 256: Align = 32; break;
3465 // Now we should have the closing ']'
3466 E = Parser.getTok().getLoc();
3467 if (Parser.getTok().isNot(AsmToken::RBrac))
3468 return Error(E, "']' expected");
3469 Parser.Lex(); // Eat right bracket token.
3471 // Don't worry about range checking the value here. That's handled by
3472 // the is*() predicates.
3473 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0,
3474 ARM_AM::no_shift, 0, Align,
3477 // If there's a pre-indexing writeback marker, '!', just add it as a token
3479 if (Parser.getTok().is(AsmToken::Exclaim)) {
3480 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3481 Parser.Lex(); // Eat the '!'.
3487 // If we have a '#', it's an immediate offset, else assume it's a register
3489 if (Parser.getTok().is(AsmToken::Hash)) {
3490 Parser.Lex(); // Eat the '#'.
3491 E = Parser.getTok().getLoc();
3493 bool isNegative = getParser().getTok().is(AsmToken::Minus);
3494 const MCExpr *Offset;
3495 if (getParser().ParseExpression(Offset))
3498 // The expression has to be a constant. Memory references with relocations
3499 // don't come through here, as they use the <label> forms of the relevant
3501 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
3503 return Error (E, "constant expression expected");
3505 // If the constant was #-0, represent it as INT32_MIN.
3506 int32_t Val = CE->getValue();
3507 if (isNegative && Val == 0)
3508 CE = MCConstantExpr::Create(INT32_MIN, getContext());
3510 // Now we should have the closing ']'
3511 E = Parser.getTok().getLoc();
3512 if (Parser.getTok().isNot(AsmToken::RBrac))
3513 return Error(E, "']' expected");
3514 Parser.Lex(); // Eat right bracket token.
3516 // Don't worry about range checking the value here. That's handled by
3517 // the is*() predicates.
3518 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
3519 ARM_AM::no_shift, 0, 0,
3522 // If there's a pre-indexing writeback marker, '!', just add it as a token
3524 if (Parser.getTok().is(AsmToken::Exclaim)) {
3525 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3526 Parser.Lex(); // Eat the '!'.
3532 // The register offset is optionally preceded by a '+' or '-'
3533 bool isNegative = false;
3534 if (Parser.getTok().is(AsmToken::Minus)) {
3536 Parser.Lex(); // Eat the '-'.
3537 } else if (Parser.getTok().is(AsmToken::Plus)) {
3539 Parser.Lex(); // Eat the '+'.
3542 E = Parser.getTok().getLoc();
3543 int OffsetRegNum = tryParseRegister();
3544 if (OffsetRegNum == -1)
3545 return Error(E, "register expected");
3547 // If there's a shift operator, handle it.
3548 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
3549 unsigned ShiftImm = 0;
3550 if (Parser.getTok().is(AsmToken::Comma)) {
3551 Parser.Lex(); // Eat the ','.
3552 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
3556 // Now we should have the closing ']'
3557 E = Parser.getTok().getLoc();
3558 if (Parser.getTok().isNot(AsmToken::RBrac))
3559 return Error(E, "']' expected");
3560 Parser.Lex(); // Eat right bracket token.
3562 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
3563 ShiftType, ShiftImm, 0, isNegative,
3566 // If there's a pre-indexing writeback marker, '!', just add it as a token
3568 if (Parser.getTok().is(AsmToken::Exclaim)) {
3569 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3570 Parser.Lex(); // Eat the '!'.
3576 /// parseMemRegOffsetShift - one of these two:
3577 /// ( lsl | lsr | asr | ror ) , # shift_amount
3579 /// return true if it parses a shift otherwise it returns false.
3580 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
3582 SMLoc Loc = Parser.getTok().getLoc();
3583 const AsmToken &Tok = Parser.getTok();
3584 if (Tok.isNot(AsmToken::Identifier))
3586 StringRef ShiftName = Tok.getString();
3587 if (ShiftName == "lsl" || ShiftName == "LSL")
3589 else if (ShiftName == "lsr" || ShiftName == "LSR")
3591 else if (ShiftName == "asr" || ShiftName == "ASR")
3593 else if (ShiftName == "ror" || ShiftName == "ROR")
3595 else if (ShiftName == "rrx" || ShiftName == "RRX")
3598 return Error(Loc, "illegal shift operator");
3599 Parser.Lex(); // Eat shift type token.
3601 // rrx stands alone.
3603 if (St != ARM_AM::rrx) {
3604 Loc = Parser.getTok().getLoc();
3605 // A '#' and a shift amount.
3606 const AsmToken &HashTok = Parser.getTok();
3607 if (HashTok.isNot(AsmToken::Hash))
3608 return Error(HashTok.getLoc(), "'#' expected");
3609 Parser.Lex(); // Eat hash token.
3612 if (getParser().ParseExpression(Expr))
3614 // Range check the immediate.
3615 // lsl, ror: 0 <= imm <= 31
3616 // lsr, asr: 0 <= imm <= 32
3617 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3619 return Error(Loc, "shift amount must be an immediate");
3620 int64_t Imm = CE->getValue();
3622 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
3623 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
3624 return Error(Loc, "immediate shift value out of range");
3631 /// parseFPImm - A floating point immediate expression operand.
3632 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
3633 parseFPImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3634 SMLoc S = Parser.getTok().getLoc();
3636 if (Parser.getTok().isNot(AsmToken::Hash))
3637 return MatchOperand_NoMatch;
3639 // Disambiguate the VMOV forms that can accept an FP immediate.
3640 // vmov.f32 <sreg>, #imm
3641 // vmov.f64 <dreg>, #imm
3642 // vmov.f32 <dreg>, #imm @ vector f32x2
3643 // vmov.f32 <qreg>, #imm @ vector f32x4
3645 // There are also the NEON VMOV instructions which expect an
3646 // integer constant. Make sure we don't try to parse an FPImm
3648 // vmov.i{8|16|32|64} <dreg|qreg>, #imm
3649 ARMOperand *TyOp = static_cast<ARMOperand*>(Operands[2]);
3650 if (!TyOp->isToken() || (TyOp->getToken() != ".f32" &&
3651 TyOp->getToken() != ".f64"))
3652 return MatchOperand_NoMatch;
3654 Parser.Lex(); // Eat the '#'.
3656 // Handle negation, as that still comes through as a separate token.
3657 bool isNegative = false;
3658 if (Parser.getTok().is(AsmToken::Minus)) {
3662 const AsmToken &Tok = Parser.getTok();
3663 if (Tok.is(AsmToken::Real)) {
3664 APFloat RealVal(APFloat::IEEEdouble, Tok.getString());
3665 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
3666 // If we had a '-' in front, toggle the sign bit.
3667 IntVal ^= (uint64_t)isNegative << 63;
3668 int Val = ARM_AM::getFP64Imm(APInt(64, IntVal));
3669 Parser.Lex(); // Eat the token.
3671 TokError("floating point value out of range");
3672 return MatchOperand_ParseFail;
3674 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3675 return MatchOperand_Success;
3677 if (Tok.is(AsmToken::Integer)) {
3678 int64_t Val = Tok.getIntVal();
3679 Parser.Lex(); // Eat the token.
3680 if (Val > 255 || Val < 0) {
3681 TokError("encoded floating point value out of range");
3682 return MatchOperand_ParseFail;
3684 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3685 return MatchOperand_Success;
3688 TokError("invalid floating point immediate");
3689 return MatchOperand_ParseFail;
3691 /// Parse a arm instruction operand. For now this parses the operand regardless
3692 /// of the mnemonic.
3693 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3694 StringRef Mnemonic) {
3697 // Check if the current operand has a custom associated parser, if so, try to
3698 // custom parse the operand, or fallback to the general approach.
3699 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
3700 if (ResTy == MatchOperand_Success)
3702 // If there wasn't a custom match, try the generic matcher below. Otherwise,
3703 // there was a match, but an error occurred, in which case, just return that
3704 // the operand parsing failed.
3705 if (ResTy == MatchOperand_ParseFail)
3708 switch (getLexer().getKind()) {
3710 Error(Parser.getTok().getLoc(), "unexpected token in operand");
3712 case AsmToken::Identifier: {
3713 // If this is VMRS, check for the apsr_nzcv operand.
3714 if (!tryParseRegisterWithWriteBack(Operands))
3716 int Res = tryParseShiftRegister(Operands);
3717 if (Res == 0) // success
3719 else if (Res == -1) // irrecoverable error
3721 if (Mnemonic == "vmrs" && Parser.getTok().getString() == "apsr_nzcv") {
3722 S = Parser.getTok().getLoc();
3724 Operands.push_back(ARMOperand::CreateToken("apsr_nzcv", S));
3728 // Fall though for the Identifier case that is not a register or a
3731 case AsmToken::LParen: // parenthesized expressions like (_strcmp-4)
3732 case AsmToken::Integer: // things like 1f and 2b as a branch targets
3733 case AsmToken::Dot: { // . as a branch target
3734 // This was not a register so parse other operands that start with an
3735 // identifier (like labels) as expressions and create them as immediates.
3736 const MCExpr *IdVal;
3737 S = Parser.getTok().getLoc();
3738 if (getParser().ParseExpression(IdVal))
3740 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3741 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
3744 case AsmToken::LBrac:
3745 return parseMemory(Operands);
3746 case AsmToken::LCurly:
3747 return parseRegisterList(Operands);
3748 case AsmToken::Hash: {
3749 // #42 -> immediate.
3750 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
3751 S = Parser.getTok().getLoc();
3753 bool isNegative = Parser.getTok().is(AsmToken::Minus);
3754 const MCExpr *ImmVal;
3755 if (getParser().ParseExpression(ImmVal))
3757 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ImmVal);
3759 Error(S, "constant expression expected");
3760 return MatchOperand_ParseFail;
3762 int32_t Val = CE->getValue();
3763 if (isNegative && Val == 0)
3764 ImmVal = MCConstantExpr::Create(INT32_MIN, getContext());
3765 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3766 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
3769 case AsmToken::Colon: {
3770 // ":lower16:" and ":upper16:" expression prefixes
3771 // FIXME: Check it's an expression prefix,
3772 // e.g. (FOO - :lower16:BAR) isn't legal.
3773 ARMMCExpr::VariantKind RefKind;
3774 if (parsePrefix(RefKind))
3777 const MCExpr *SubExprVal;
3778 if (getParser().ParseExpression(SubExprVal))
3781 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
3783 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3784 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
3790 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
3791 // :lower16: and :upper16:.
3792 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
3793 RefKind = ARMMCExpr::VK_ARM_None;
3795 // :lower16: and :upper16: modifiers
3796 assert(getLexer().is(AsmToken::Colon) && "expected a :");
3797 Parser.Lex(); // Eat ':'
3799 if (getLexer().isNot(AsmToken::Identifier)) {
3800 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
3804 StringRef IDVal = Parser.getTok().getIdentifier();
3805 if (IDVal == "lower16") {
3806 RefKind = ARMMCExpr::VK_ARM_LO16;
3807 } else if (IDVal == "upper16") {
3808 RefKind = ARMMCExpr::VK_ARM_HI16;
3810 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
3815 if (getLexer().isNot(AsmToken::Colon)) {
3816 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
3819 Parser.Lex(); // Eat the last ':'
3823 /// \brief Given a mnemonic, split out possible predication code and carry
3824 /// setting letters to form a canonical mnemonic and flags.
3826 // FIXME: Would be nice to autogen this.
3827 // FIXME: This is a bit of a maze of special cases.
3828 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
3829 unsigned &PredicationCode,
3831 unsigned &ProcessorIMod,
3832 StringRef &ITMask) {
3833 PredicationCode = ARMCC::AL;
3834 CarrySetting = false;
3837 // Ignore some mnemonics we know aren't predicated forms.
3839 // FIXME: Would be nice to autogen this.
3840 if ((Mnemonic == "movs" && isThumb()) ||
3841 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
3842 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
3843 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
3844 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
3845 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
3846 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
3847 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
3850 // First, split out any predication code. Ignore mnemonics we know aren't
3851 // predicated but do have a carry-set and so weren't caught above.
3852 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
3853 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
3854 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
3855 Mnemonic != "sbcs" && Mnemonic != "rscs") {
3856 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
3857 .Case("eq", ARMCC::EQ)
3858 .Case("ne", ARMCC::NE)
3859 .Case("hs", ARMCC::HS)
3860 .Case("cs", ARMCC::HS)
3861 .Case("lo", ARMCC::LO)
3862 .Case("cc", ARMCC::LO)
3863 .Case("mi", ARMCC::MI)
3864 .Case("pl", ARMCC::PL)
3865 .Case("vs", ARMCC::VS)
3866 .Case("vc", ARMCC::VC)
3867 .Case("hi", ARMCC::HI)
3868 .Case("ls", ARMCC::LS)
3869 .Case("ge", ARMCC::GE)
3870 .Case("lt", ARMCC::LT)
3871 .Case("gt", ARMCC::GT)
3872 .Case("le", ARMCC::LE)
3873 .Case("al", ARMCC::AL)
3876 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
3877 PredicationCode = CC;
3881 // Next, determine if we have a carry setting bit. We explicitly ignore all
3882 // the instructions we know end in 's'.
3883 if (Mnemonic.endswith("s") &&
3884 !(Mnemonic == "cps" || Mnemonic == "mls" ||
3885 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
3886 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
3887 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
3888 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
3889 (Mnemonic == "movs" && isThumb()))) {
3890 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
3891 CarrySetting = true;
3894 // The "cps" instruction can have a interrupt mode operand which is glued into
3895 // the mnemonic. Check if this is the case, split it and parse the imod op
3896 if (Mnemonic.startswith("cps")) {
3897 // Split out any imod code.
3899 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
3900 .Case("ie", ARM_PROC::IE)
3901 .Case("id", ARM_PROC::ID)
3904 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
3905 ProcessorIMod = IMod;
3909 // The "it" instruction has the condition mask on the end of the mnemonic.
3910 if (Mnemonic.startswith("it")) {
3911 ITMask = Mnemonic.slice(2, Mnemonic.size());
3912 Mnemonic = Mnemonic.slice(0, 2);
3918 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
3919 /// inclusion of carry set or predication code operands.
3921 // FIXME: It would be nice to autogen this.
3923 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
3924 bool &CanAcceptPredicationCode) {
3925 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
3926 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
3927 Mnemonic == "add" || Mnemonic == "adc" ||
3928 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
3929 Mnemonic == "orr" || Mnemonic == "mvn" ||
3930 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
3931 Mnemonic == "sbc" || Mnemonic == "eor" || Mnemonic == "neg" ||
3932 (!isThumb() && (Mnemonic == "smull" || Mnemonic == "mov" ||
3933 Mnemonic == "mla" || Mnemonic == "smlal" ||
3934 Mnemonic == "umlal" || Mnemonic == "umull"))) {
3935 CanAcceptCarrySet = true;
3937 CanAcceptCarrySet = false;
3939 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
3940 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
3941 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
3942 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
3943 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "setend" ||
3944 (Mnemonic == "clrex" && !isThumb()) ||
3945 (Mnemonic == "nop" && isThumbOne()) ||
3946 ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw" ||
3947 Mnemonic == "ldc2" || Mnemonic == "ldc2l" ||
3948 Mnemonic == "stc2" || Mnemonic == "stc2l") && !isThumb()) ||
3949 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs")) &&
3951 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumbOne())) {
3952 CanAcceptPredicationCode = false;
3954 CanAcceptPredicationCode = true;
3957 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
3958 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
3959 CanAcceptPredicationCode = false;
3963 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
3964 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3965 // FIXME: This is all horribly hacky. We really need a better way to deal
3966 // with optional operands like this in the matcher table.
3968 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
3969 // another does not. Specifically, the MOVW instruction does not. So we
3970 // special case it here and remove the defaulted (non-setting) cc_out
3971 // operand if that's the instruction we're trying to match.
3973 // We do this as post-processing of the explicit operands rather than just
3974 // conditionally adding the cc_out in the first place because we need
3975 // to check the type of the parsed immediate operand.
3976 if (Mnemonic == "mov" && Operands.size() > 4 && !isThumb() &&
3977 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
3978 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
3979 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3982 // Register-register 'add' for thumb does not have a cc_out operand
3983 // when there are only two register operands.
3984 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
3985 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3986 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3987 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3989 // Register-register 'add' for thumb does not have a cc_out operand
3990 // when it's an ADD Rdm, SP, {Rdm|#imm0_255} instruction. We do
3991 // have to check the immediate range here since Thumb2 has a variant
3992 // that can handle a different range and has a cc_out operand.
3993 if (((isThumb() && Mnemonic == "add") ||
3994 (isThumbTwo() && Mnemonic == "sub")) &&
3995 Operands.size() == 6 &&
3996 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3997 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3998 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
3999 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
4000 (static_cast<ARMOperand*>(Operands[5])->isReg() ||
4001 static_cast<ARMOperand*>(Operands[5])->isImm0_1020s4()))
4003 // For Thumb2, add/sub immediate does not have a cc_out operand for the
4004 // imm0_4095 variant. That's the least-preferred variant when
4005 // selecting via the generic "add" mnemonic, so to know that we
4006 // should remove the cc_out operand, we have to explicitly check that
4007 // it's not one of the other variants. Ugh.
4008 if (isThumbTwo() && (Mnemonic == "add" || Mnemonic == "sub") &&
4009 Operands.size() == 6 &&
4010 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4011 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4012 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4013 // Nest conditions rather than one big 'if' statement for readability.
4015 // If either register is a high reg, it's either one of the SP
4016 // variants (handled above) or a 32-bit encoding, so we just
4017 // check against T3.
4018 if ((!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
4019 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg())) &&
4020 static_cast<ARMOperand*>(Operands[5])->isT2SOImm())
4022 // If both registers are low, we're in an IT block, and the immediate is
4023 // in range, we should use encoding T1 instead, which has a cc_out.
4025 isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) &&
4026 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
4027 static_cast<ARMOperand*>(Operands[5])->isImm0_7())
4030 // Otherwise, we use encoding T4, which does not have a cc_out
4035 // The thumb2 multiply instruction doesn't have a CCOut register, so
4036 // if we have a "mul" mnemonic in Thumb mode, check if we'll be able to
4037 // use the 16-bit encoding or not.
4038 if (isThumbTwo() && Mnemonic == "mul" && Operands.size() == 6 &&
4039 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
4040 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4041 static_cast<ARMOperand*>(Operands[4])->isReg() &&
4042 static_cast<ARMOperand*>(Operands[5])->isReg() &&
4043 // If the registers aren't low regs, the destination reg isn't the
4044 // same as one of the source regs, or the cc_out operand is zero
4045 // outside of an IT block, we have to use the 32-bit encoding, so
4046 // remove the cc_out operand.
4047 (!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
4048 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) ||
4050 (static_cast<ARMOperand*>(Operands[3])->getReg() !=
4051 static_cast<ARMOperand*>(Operands[5])->getReg() &&
4052 static_cast<ARMOperand*>(Operands[3])->getReg() !=
4053 static_cast<ARMOperand*>(Operands[4])->getReg())))
4058 // Register-register 'add/sub' for thumb does not have a cc_out operand
4059 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
4060 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
4061 // right, this will result in better diagnostics (which operand is off)
4063 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
4064 (Operands.size() == 5 || Operands.size() == 6) &&
4065 static_cast<ARMOperand*>(Operands[3])->isReg() &&
4066 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
4067 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
4073 /// Parse an arm instruction mnemonic followed by its operands.
4074 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
4075 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4076 // Create the leading tokens for the mnemonic, split by '.' characters.
4077 size_t Start = 0, Next = Name.find('.');
4078 StringRef Mnemonic = Name.slice(Start, Next);
4080 // Split out the predication code and carry setting flag from the mnemonic.
4081 unsigned PredicationCode;
4082 unsigned ProcessorIMod;
4085 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
4086 ProcessorIMod, ITMask);
4088 // In Thumb1, only the branch (B) instruction can be predicated.
4089 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
4090 Parser.EatToEndOfStatement();
4091 return Error(NameLoc, "conditional execution not supported in Thumb1");
4094 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
4096 // Handle the IT instruction ITMask. Convert it to a bitmask. This
4097 // is the mask as it will be for the IT encoding if the conditional
4098 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
4099 // where the conditional bit0 is zero, the instruction post-processing
4100 // will adjust the mask accordingly.
4101 if (Mnemonic == "it") {
4102 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + 2);
4103 if (ITMask.size() > 3) {
4104 Parser.EatToEndOfStatement();
4105 return Error(Loc, "too many conditions on IT instruction");
4108 for (unsigned i = ITMask.size(); i != 0; --i) {
4109 char pos = ITMask[i - 1];
4110 if (pos != 't' && pos != 'e') {
4111 Parser.EatToEndOfStatement();
4112 return Error(Loc, "illegal IT block condition mask '" + ITMask + "'");
4115 if (ITMask[i - 1] == 't')
4118 Operands.push_back(ARMOperand::CreateITMask(Mask, Loc));
4121 // FIXME: This is all a pretty gross hack. We should automatically handle
4122 // optional operands like this via tblgen.
4124 // Next, add the CCOut and ConditionCode operands, if needed.
4126 // For mnemonics which can ever incorporate a carry setting bit or predication
4127 // code, our matching model involves us always generating CCOut and
4128 // ConditionCode operands to match the mnemonic "as written" and then we let
4129 // the matcher deal with finding the right instruction or generating an
4130 // appropriate error.
4131 bool CanAcceptCarrySet, CanAcceptPredicationCode;
4132 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
4134 // If we had a carry-set on an instruction that can't do that, issue an
4136 if (!CanAcceptCarrySet && CarrySetting) {
4137 Parser.EatToEndOfStatement();
4138 return Error(NameLoc, "instruction '" + Mnemonic +
4139 "' can not set flags, but 's' suffix specified");
4141 // If we had a predication code on an instruction that can't do that, issue an
4143 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
4144 Parser.EatToEndOfStatement();
4145 return Error(NameLoc, "instruction '" + Mnemonic +
4146 "' is not predicable, but condition code specified");
4149 // Add the carry setting operand, if necessary.
4150 if (CanAcceptCarrySet) {
4151 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size());
4152 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
4156 // Add the predication code operand, if necessary.
4157 if (CanAcceptPredicationCode) {
4158 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size() +
4160 Operands.push_back(ARMOperand::CreateCondCode(
4161 ARMCC::CondCodes(PredicationCode), Loc));
4164 // Add the processor imod operand, if necessary.
4165 if (ProcessorIMod) {
4166 Operands.push_back(ARMOperand::CreateImm(
4167 MCConstantExpr::Create(ProcessorIMod, getContext()),
4171 // Add the remaining tokens in the mnemonic.
4172 while (Next != StringRef::npos) {
4174 Next = Name.find('.', Start + 1);
4175 StringRef ExtraToken = Name.slice(Start, Next);
4177 // For now, we're only parsing Thumb1 (for the most part), so
4178 // just ignore ".n" qualifiers. We'll use them to restrict
4179 // matching when we do Thumb2.
4180 if (ExtraToken != ".n") {
4181 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Start);
4182 Operands.push_back(ARMOperand::CreateToken(ExtraToken, Loc));
4186 // Read the remaining operands.
4187 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4188 // Read the first operand.
4189 if (parseOperand(Operands, Mnemonic)) {
4190 Parser.EatToEndOfStatement();
4194 while (getLexer().is(AsmToken::Comma)) {
4195 Parser.Lex(); // Eat the comma.
4197 // Parse and remember the operand.
4198 if (parseOperand(Operands, Mnemonic)) {
4199 Parser.EatToEndOfStatement();
4205 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4206 SMLoc Loc = getLexer().getLoc();
4207 Parser.EatToEndOfStatement();
4208 return Error(Loc, "unexpected token in argument list");
4211 Parser.Lex(); // Consume the EndOfStatement
4213 // Some instructions, mostly Thumb, have forms for the same mnemonic that
4214 // do and don't have a cc_out optional-def operand. With some spot-checks
4215 // of the operand list, we can figure out which variant we're trying to
4216 // parse and adjust accordingly before actually matching. We shouldn't ever
4217 // try to remove a cc_out operand that was explicitly set on the the
4218 // mnemonic, of course (CarrySetting == true). Reason number #317 the
4219 // table driven matcher doesn't fit well with the ARM instruction set.
4220 if (!CarrySetting && shouldOmitCCOutOperand(Mnemonic, Operands)) {
4221 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
4222 Operands.erase(Operands.begin() + 1);
4226 // ARM mode 'blx' need special handling, as the register operand version
4227 // is predicable, but the label operand version is not. So, we can't rely
4228 // on the Mnemonic based checking to correctly figure out when to put
4229 // a k_CondCode operand in the list. If we're trying to match the label
4230 // version, remove the k_CondCode operand here.
4231 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
4232 static_cast<ARMOperand*>(Operands[2])->isImm()) {
4233 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
4234 Operands.erase(Operands.begin() + 1);
4238 // The vector-compare-to-zero instructions have a literal token "#0" at
4239 // the end that comes to here as an immediate operand. Convert it to a
4240 // token to play nicely with the matcher.
4241 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
4242 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
4243 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4244 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
4245 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4246 if (CE && CE->getValue() == 0) {
4247 Operands.erase(Operands.begin() + 5);
4248 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4252 // VCMP{E} does the same thing, but with a different operand count.
4253 if ((Mnemonic == "vcmp" || Mnemonic == "vcmpe") && Operands.size() == 5 &&
4254 static_cast<ARMOperand*>(Operands[4])->isImm()) {
4255 ARMOperand *Op = static_cast<ARMOperand*>(Operands[4]);
4256 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4257 if (CE && CE->getValue() == 0) {
4258 Operands.erase(Operands.begin() + 4);
4259 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4263 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
4264 // end. Convert it to a token here.
4265 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
4266 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4267 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
4268 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4269 if (CE && CE->getValue() == 0) {
4270 Operands.erase(Operands.begin() + 5);
4271 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4279 // Validate context-sensitive operand constraints.
4281 // return 'true' if register list contains non-low GPR registers,
4282 // 'false' otherwise. If Reg is in the register list or is HiReg, set
4283 // 'containsReg' to true.
4284 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
4285 unsigned HiReg, bool &containsReg) {
4286 containsReg = false;
4287 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4288 unsigned OpReg = Inst.getOperand(i).getReg();
4291 // Anything other than a low register isn't legal here.
4292 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
4298 // Check if the specified regisgter is in the register list of the inst,
4299 // starting at the indicated operand number.
4300 static bool listContainsReg(MCInst &Inst, unsigned OpNo, unsigned Reg) {
4301 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4302 unsigned OpReg = Inst.getOperand(i).getReg();
4309 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
4310 // the ARMInsts array) instead. Getting that here requires awkward
4311 // API changes, though. Better way?
4313 extern const MCInstrDesc ARMInsts[];
4315 static const MCInstrDesc &getInstDesc(unsigned Opcode) {
4316 return ARMInsts[Opcode];
4319 // FIXME: We would really like to be able to tablegen'erate this.
4321 validateInstruction(MCInst &Inst,
4322 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4323 const MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
4324 SMLoc Loc = Operands[0]->getStartLoc();
4325 // Check the IT block state first.
4326 // NOTE: In Thumb mode, the BKPT instruction has the interesting property of
4327 // being allowed in IT blocks, but not being predicable. It just always
4329 if (inITBlock() && Inst.getOpcode() != ARM::tBKPT) {
4331 if (ITState.FirstCond)
4332 ITState.FirstCond = false;
4334 bit = (ITState.Mask >> (5 - ITState.CurPosition)) & 1;
4335 // The instruction must be predicable.
4336 if (!MCID.isPredicable())
4337 return Error(Loc, "instructions in IT block must be predicable");
4338 unsigned Cond = Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm();
4339 unsigned ITCond = bit ? ITState.Cond :
4340 ARMCC::getOppositeCondition(ITState.Cond);
4341 if (Cond != ITCond) {
4342 // Find the condition code Operand to get its SMLoc information.
4344 for (unsigned i = 1; i < Operands.size(); ++i)
4345 if (static_cast<ARMOperand*>(Operands[i])->isCondCode())
4346 CondLoc = Operands[i]->getStartLoc();
4347 return Error(CondLoc, "incorrect condition in IT block; got '" +
4348 StringRef(ARMCondCodeToString(ARMCC::CondCodes(Cond))) +
4349 "', but expected '" +
4350 ARMCondCodeToString(ARMCC::CondCodes(ITCond)) + "'");
4352 // Check for non-'al' condition codes outside of the IT block.
4353 } else if (isThumbTwo() && MCID.isPredicable() &&
4354 Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm() !=
4355 ARMCC::AL && Inst.getOpcode() != ARM::tB &&
4356 Inst.getOpcode() != ARM::t2B)
4357 return Error(Loc, "predicated instructions must be in IT block");
4359 switch (Inst.getOpcode()) {
4362 case ARM::LDRD_POST:
4364 // Rt2 must be Rt + 1.
4365 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4366 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4368 return Error(Operands[3]->getStartLoc(),
4369 "destination operands must be sequential");
4373 // Rt2 must be Rt + 1.
4374 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4375 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4377 return Error(Operands[3]->getStartLoc(),
4378 "source operands must be sequential");
4382 case ARM::STRD_POST:
4384 // Rt2 must be Rt + 1.
4385 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4386 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
4388 return Error(Operands[3]->getStartLoc(),
4389 "source operands must be sequential");
4394 // width must be in range [1, 32-lsb]
4395 unsigned lsb = Inst.getOperand(2).getImm();
4396 unsigned widthm1 = Inst.getOperand(3).getImm();
4397 if (widthm1 >= 32 - lsb)
4398 return Error(Operands[5]->getStartLoc(),
4399 "bitfield width must be in range [1,32-lsb]");
4403 // If we're parsing Thumb2, the .w variant is available and handles
4404 // most cases that are normally illegal for a Thumb1 LDM
4405 // instruction. We'll make the transformation in processInstruction()
4408 // Thumb LDM instructions are writeback iff the base register is not
4409 // in the register list.
4410 unsigned Rn = Inst.getOperand(0).getReg();
4411 bool hasWritebackToken =
4412 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4413 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4414 bool listContainsBase;
4415 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) && !isThumbTwo())
4416 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
4417 "registers must be in range r0-r7");
4418 // If we should have writeback, then there should be a '!' token.
4419 if (!listContainsBase && !hasWritebackToken && !isThumbTwo())
4420 return Error(Operands[2]->getStartLoc(),
4421 "writeback operator '!' expected");
4422 // If we should not have writeback, there must not be a '!'. This is
4423 // true even for the 32-bit wide encodings.
4424 if (listContainsBase && hasWritebackToken)
4425 return Error(Operands[3]->getStartLoc(),
4426 "writeback operator '!' not allowed when base register "
4427 "in register list");
4431 case ARM::t2LDMIA_UPD: {
4432 if (listContainsReg(Inst, 3, Inst.getOperand(0).getReg()))
4433 return Error(Operands[4]->getStartLoc(),
4434 "writeback operator '!' not allowed when base register "
4435 "in register list");
4439 bool listContainsBase;
4440 if (checkLowRegisterList(Inst, 3, 0, ARM::PC, listContainsBase))
4441 return Error(Operands[2]->getStartLoc(),
4442 "registers must be in range r0-r7 or pc");
4446 bool listContainsBase;
4447 if (checkLowRegisterList(Inst, 3, 0, ARM::LR, listContainsBase))
4448 return Error(Operands[2]->getStartLoc(),
4449 "registers must be in range r0-r7 or lr");
4452 case ARM::tSTMIA_UPD: {
4453 bool listContainsBase;
4454 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase) && !isThumbTwo())
4455 return Error(Operands[4]->getStartLoc(),
4456 "registers must be in range r0-r7");
4465 processInstruction(MCInst &Inst,
4466 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4467 switch (Inst.getOpcode()) {
4468 case ARM::LDMIA_UPD:
4469 // If this is a load of a single register via a 'pop', then we should use
4470 // a post-indexed LDR instruction instead, per the ARM ARM.
4471 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
4472 Inst.getNumOperands() == 5) {
4474 TmpInst.setOpcode(ARM::LDR_POST_IMM);
4475 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4476 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4477 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4478 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
4479 TmpInst.addOperand(MCOperand::CreateImm(4));
4480 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4481 TmpInst.addOperand(Inst.getOperand(3));
4485 case ARM::STMDB_UPD:
4486 // If this is a store of a single register via a 'push', then we should use
4487 // a pre-indexed STR instruction instead, per the ARM ARM.
4488 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
4489 Inst.getNumOperands() == 5) {
4491 TmpInst.setOpcode(ARM::STR_PRE_IMM);
4492 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4493 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4494 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
4495 TmpInst.addOperand(MCOperand::CreateImm(-4));
4496 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4497 TmpInst.addOperand(Inst.getOperand(3));
4502 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4503 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4504 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4505 // to encoding T1 if <Rd> is omitted."
4506 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6)
4507 Inst.setOpcode(ARM::tADDi3);
4510 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4511 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4512 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4513 // to encoding T1 if <Rd> is omitted."
4514 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6)
4515 Inst.setOpcode(ARM::tSUBi3);
4518 // A Thumb conditional branch outside of an IT block is a tBcc.
4519 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock())
4520 Inst.setOpcode(ARM::tBcc);
4523 // A Thumb2 conditional branch outside of an IT block is a t2Bcc.
4524 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock())
4525 Inst.setOpcode(ARM::t2Bcc);
4528 // If the conditional is AL or we're in an IT block, we really want t2B.
4529 if (Inst.getOperand(1).getImm() == ARMCC::AL || inITBlock())
4530 Inst.setOpcode(ARM::t2B);
4533 // If the conditional is AL, we really want tB.
4534 if (Inst.getOperand(1).getImm() == ARMCC::AL)
4535 Inst.setOpcode(ARM::tB);
4538 // If the register list contains any high registers, or if the writeback
4539 // doesn't match what tLDMIA can do, we need to use the 32-bit encoding
4540 // instead if we're in Thumb2. Otherwise, this should have generated
4541 // an error in validateInstruction().
4542 unsigned Rn = Inst.getOperand(0).getReg();
4543 bool hasWritebackToken =
4544 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4545 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4546 bool listContainsBase;
4547 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) ||
4548 (!listContainsBase && !hasWritebackToken) ||
4549 (listContainsBase && hasWritebackToken)) {
4550 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4551 assert (isThumbTwo());
4552 Inst.setOpcode(hasWritebackToken ? ARM::t2LDMIA_UPD : ARM::t2LDMIA);
4553 // If we're switching to the updating version, we need to insert
4554 // the writeback tied operand.
4555 if (hasWritebackToken)
4556 Inst.insert(Inst.begin(),
4557 MCOperand::CreateReg(Inst.getOperand(0).getReg()));
4561 case ARM::tSTMIA_UPD: {
4562 // If the register list contains any high registers, we need to use
4563 // the 32-bit encoding instead if we're in Thumb2. Otherwise, this
4564 // should have generated an error in validateInstruction().
4565 unsigned Rn = Inst.getOperand(0).getReg();
4566 bool listContainsBase;
4567 if (checkLowRegisterList(Inst, 4, Rn, 0, listContainsBase)) {
4568 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4569 assert (isThumbTwo());
4570 Inst.setOpcode(ARM::t2STMIA_UPD);
4575 // If we can use the 16-bit encoding and the user didn't explicitly
4576 // request the 32-bit variant, transform it here.
4577 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4578 Inst.getOperand(1).getImm() <= 255 &&
4579 ((!inITBlock() && Inst.getOperand(2).getImm() == ARMCC::AL &&
4580 Inst.getOperand(4).getReg() == ARM::CPSR) ||
4581 (inITBlock() && Inst.getOperand(4).getReg() == 0)) &&
4582 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4583 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4584 // The operands aren't in the same order for tMOVi8...
4586 TmpInst.setOpcode(ARM::tMOVi8);
4587 TmpInst.addOperand(Inst.getOperand(0));
4588 TmpInst.addOperand(Inst.getOperand(4));
4589 TmpInst.addOperand(Inst.getOperand(1));
4590 TmpInst.addOperand(Inst.getOperand(2));
4591 TmpInst.addOperand(Inst.getOperand(3));
4597 // If we can use the 16-bit encoding and the user didn't explicitly
4598 // request the 32-bit variant, transform it here.
4599 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4600 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4601 Inst.getOperand(2).getImm() == ARMCC::AL &&
4602 Inst.getOperand(4).getReg() == ARM::CPSR &&
4603 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4604 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4605 // The operands aren't the same for tMOV[S]r... (no cc_out)
4607 TmpInst.setOpcode(Inst.getOperand(4).getReg() ? ARM::tMOVSr : ARM::tMOVr);
4608 TmpInst.addOperand(Inst.getOperand(0));
4609 TmpInst.addOperand(Inst.getOperand(1));
4610 TmpInst.addOperand(Inst.getOperand(2));
4611 TmpInst.addOperand(Inst.getOperand(3));
4620 // If we can use the 16-bit encoding and the user didn't explicitly
4621 // request the 32-bit variant, transform it here.
4622 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4623 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4624 Inst.getOperand(2).getImm() == 0 &&
4625 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4626 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4628 switch (Inst.getOpcode()) {
4629 default: llvm_unreachable("Illegal opcode!");
4630 case ARM::t2SXTH: NewOpc = ARM::tSXTH; break;
4631 case ARM::t2SXTB: NewOpc = ARM::tSXTB; break;
4632 case ARM::t2UXTH: NewOpc = ARM::tUXTH; break;
4633 case ARM::t2UXTB: NewOpc = ARM::tUXTB; break;
4635 // The operands aren't the same for thumb1 (no rotate operand).
4637 TmpInst.setOpcode(NewOpc);
4638 TmpInst.addOperand(Inst.getOperand(0));
4639 TmpInst.addOperand(Inst.getOperand(1));
4640 TmpInst.addOperand(Inst.getOperand(3));
4641 TmpInst.addOperand(Inst.getOperand(4));
4647 // The mask bits for all but the first condition are represented as
4648 // the low bit of the condition code value implies 't'. We currently
4649 // always have 1 implies 't', so XOR toggle the bits if the low bit
4650 // of the condition code is zero. The encoding also expects the low
4651 // bit of the condition to be encoded as bit 4 of the mask operand,
4652 // so mask that in if needed
4653 MCOperand &MO = Inst.getOperand(1);
4654 unsigned Mask = MO.getImm();
4655 unsigned OrigMask = Mask;
4656 unsigned TZ = CountTrailingZeros_32(Mask);
4657 if ((Inst.getOperand(0).getImm() & 1) == 0) {
4658 assert(Mask && TZ <= 3 && "illegal IT mask value!");
4659 for (unsigned i = 3; i != TZ; --i)
4665 // Set up the IT block state according to the IT instruction we just
4667 assert(!inITBlock() && "nested IT blocks?!");
4668 ITState.Cond = ARMCC::CondCodes(Inst.getOperand(0).getImm());
4669 ITState.Mask = OrigMask; // Use the original mask, not the updated one.
4670 ITState.CurPosition = 0;
4671 ITState.FirstCond = true;
4677 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
4678 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
4679 // suffix depending on whether they're in an IT block or not.
4680 unsigned Opc = Inst.getOpcode();
4681 const MCInstrDesc &MCID = getInstDesc(Opc);
4682 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
4683 assert(MCID.hasOptionalDef() &&
4684 "optionally flag setting instruction missing optional def operand");
4685 assert(MCID.NumOperands == Inst.getNumOperands() &&
4686 "operand count mismatch!");
4687 // Find the optional-def operand (cc_out).
4690 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
4693 // If we're parsing Thumb1, reject it completely.
4694 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
4695 return Match_MnemonicFail;
4696 // If we're parsing Thumb2, which form is legal depends on whether we're
4698 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR &&
4700 return Match_RequiresITBlock;
4701 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() == ARM::CPSR &&
4703 return Match_RequiresNotITBlock;
4705 // Some high-register supporting Thumb1 encodings only allow both registers
4706 // to be from r0-r7 when in Thumb2.
4707 else if (Opc == ARM::tADDhirr && isThumbOne() &&
4708 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4709 isARMLowRegister(Inst.getOperand(2).getReg()))
4710 return Match_RequiresThumb2;
4711 // Others only require ARMv6 or later.
4712 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
4713 isARMLowRegister(Inst.getOperand(0).getReg()) &&
4714 isARMLowRegister(Inst.getOperand(1).getReg()))
4715 return Match_RequiresV6;
4716 return Match_Success;
4720 MatchAndEmitInstruction(SMLoc IDLoc,
4721 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
4725 unsigned MatchResult;
4726 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
4727 switch (MatchResult) {
4730 // Context sensitive operand constraints aren't handled by the matcher,
4731 // so check them here.
4732 if (validateInstruction(Inst, Operands)) {
4733 // Still progress the IT block, otherwise one wrong condition causes
4734 // nasty cascading errors.
4735 forwardITPosition();
4739 // Some instructions need post-processing to, for example, tweak which
4740 // encoding is selected.
4741 processInstruction(Inst, Operands);
4743 // Only move forward at the very end so that everything in validate
4744 // and process gets a consistent answer about whether we're in an IT
4746 forwardITPosition();
4748 Out.EmitInstruction(Inst);
4750 case Match_MissingFeature:
4751 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
4753 case Match_InvalidOperand: {
4754 SMLoc ErrorLoc = IDLoc;
4755 if (ErrorInfo != ~0U) {
4756 if (ErrorInfo >= Operands.size())
4757 return Error(IDLoc, "too few operands for instruction");
4759 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
4760 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
4763 return Error(ErrorLoc, "invalid operand for instruction");
4765 case Match_MnemonicFail:
4766 return Error(IDLoc, "invalid instruction");
4767 case Match_ConversionFail:
4768 // The converter function will have already emited a diagnostic.
4770 case Match_RequiresNotITBlock:
4771 return Error(IDLoc, "flag setting instruction only valid outside IT block");
4772 case Match_RequiresITBlock:
4773 return Error(IDLoc, "instruction only valid inside IT block");
4774 case Match_RequiresV6:
4775 return Error(IDLoc, "instruction variant requires ARMv6 or later");
4776 case Match_RequiresThumb2:
4777 return Error(IDLoc, "instruction variant requires Thumb2");
4780 llvm_unreachable("Implement any new match types added!");
4784 /// parseDirective parses the arm specific directives
4785 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
4786 StringRef IDVal = DirectiveID.getIdentifier();
4787 if (IDVal == ".word")
4788 return parseDirectiveWord(4, DirectiveID.getLoc());
4789 else if (IDVal == ".thumb")
4790 return parseDirectiveThumb(DirectiveID.getLoc());
4791 else if (IDVal == ".thumb_func")
4792 return parseDirectiveThumbFunc(DirectiveID.getLoc());
4793 else if (IDVal == ".code")
4794 return parseDirectiveCode(DirectiveID.getLoc());
4795 else if (IDVal == ".syntax")
4796 return parseDirectiveSyntax(DirectiveID.getLoc());
4800 /// parseDirectiveWord
4801 /// ::= .word [ expression (, expression)* ]
4802 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
4803 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4805 const MCExpr *Value;
4806 if (getParser().ParseExpression(Value))
4809 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
4811 if (getLexer().is(AsmToken::EndOfStatement))
4814 // FIXME: Improve diagnostic.
4815 if (getLexer().isNot(AsmToken::Comma))
4816 return Error(L, "unexpected token in directive");
4825 /// parseDirectiveThumb
4827 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
4828 if (getLexer().isNot(AsmToken::EndOfStatement))
4829 return Error(L, "unexpected token in directive");
4832 // TODO: set thumb mode
4833 // TODO: tell the MC streamer the mode
4834 // getParser().getStreamer().Emit???();
4838 /// parseDirectiveThumbFunc
4839 /// ::= .thumbfunc symbol_name
4840 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
4841 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
4842 bool isMachO = MAI.hasSubsectionsViaSymbols();
4845 // Darwin asm has function name after .thumb_func direction
4848 const AsmToken &Tok = Parser.getTok();
4849 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
4850 return Error(L, "unexpected token in .thumb_func directive");
4851 Name = Tok.getString();
4852 Parser.Lex(); // Consume the identifier token.
4855 if (getLexer().isNot(AsmToken::EndOfStatement))
4856 return Error(L, "unexpected token in directive");
4859 // FIXME: assuming function name will be the line following .thumb_func
4861 Name = Parser.getTok().getString();
4864 // Mark symbol as a thumb symbol.
4865 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
4866 getParser().getStreamer().EmitThumbFunc(Func);
4870 /// parseDirectiveSyntax
4871 /// ::= .syntax unified | divided
4872 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
4873 const AsmToken &Tok = Parser.getTok();
4874 if (Tok.isNot(AsmToken::Identifier))
4875 return Error(L, "unexpected token in .syntax directive");
4876 StringRef Mode = Tok.getString();
4877 if (Mode == "unified" || Mode == "UNIFIED")
4879 else if (Mode == "divided" || Mode == "DIVIDED")
4880 return Error(L, "'.syntax divided' arm asssembly not supported");
4882 return Error(L, "unrecognized syntax mode in .syntax directive");
4884 if (getLexer().isNot(AsmToken::EndOfStatement))
4885 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
4888 // TODO tell the MC streamer the mode
4889 // getParser().getStreamer().Emit???();
4893 /// parseDirectiveCode
4894 /// ::= .code 16 | 32
4895 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
4896 const AsmToken &Tok = Parser.getTok();
4897 if (Tok.isNot(AsmToken::Integer))
4898 return Error(L, "unexpected token in .code directive");
4899 int64_t Val = Parser.getTok().getIntVal();
4905 return Error(L, "invalid operand to .code directive");
4907 if (getLexer().isNot(AsmToken::EndOfStatement))
4908 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
4914 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
4918 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
4924 extern "C" void LLVMInitializeARMAsmLexer();
4926 /// Force static initialization.
4927 extern "C" void LLVMInitializeARMAsmParser() {
4928 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
4929 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
4930 LLVMInitializeARMAsmLexer();
4933 #define GET_REGISTER_MATCHER
4934 #define GET_MATCHER_IMPLEMENTATION
4935 #include "ARMGenAsmMatcher.inc"