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*>&);
165 // Asm Match Converter Methods
166 bool cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
167 const SmallVectorImpl<MCParsedAsmOperand*> &);
168 bool cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
169 const SmallVectorImpl<MCParsedAsmOperand*> &);
170 bool cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
171 const SmallVectorImpl<MCParsedAsmOperand*> &);
172 bool cvtStWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
173 const SmallVectorImpl<MCParsedAsmOperand*> &);
174 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
175 const SmallVectorImpl<MCParsedAsmOperand*> &);
176 bool cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
177 const SmallVectorImpl<MCParsedAsmOperand*> &);
178 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
179 const SmallVectorImpl<MCParsedAsmOperand*> &);
180 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
181 const SmallVectorImpl<MCParsedAsmOperand*> &);
182 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
183 const SmallVectorImpl<MCParsedAsmOperand*> &);
184 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
185 const SmallVectorImpl<MCParsedAsmOperand*> &);
186 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
187 const SmallVectorImpl<MCParsedAsmOperand*> &);
188 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
189 const SmallVectorImpl<MCParsedAsmOperand*> &);
190 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
191 const SmallVectorImpl<MCParsedAsmOperand*> &);
192 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
193 const SmallVectorImpl<MCParsedAsmOperand*> &);
194 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
195 const SmallVectorImpl<MCParsedAsmOperand*> &);
196 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
197 const SmallVectorImpl<MCParsedAsmOperand*> &);
198 bool cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
199 const SmallVectorImpl<MCParsedAsmOperand*> &);
201 bool validateInstruction(MCInst &Inst,
202 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
203 void processInstruction(MCInst &Inst,
204 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
205 bool shouldOmitCCOutOperand(StringRef Mnemonic,
206 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
209 enum ARMMatchResultTy {
210 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
211 Match_RequiresNotITBlock,
216 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
217 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
218 MCAsmParserExtension::Initialize(_Parser);
220 // Initialize the set of available features.
221 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
223 // Not in an ITBlock to start with.
224 ITState.CurPosition = ~0U;
227 // Implementation of the MCTargetAsmParser interface:
228 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
229 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
230 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
231 bool ParseDirective(AsmToken DirectiveID);
233 unsigned checkTargetMatchPredicate(MCInst &Inst);
235 bool MatchAndEmitInstruction(SMLoc IDLoc,
236 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
239 } // end anonymous namespace
243 /// ARMOperand - Instances of this class represent a parsed ARM machine
245 class ARMOperand : public MCParsedAsmOperand {
269 k_BitfieldDescriptor,
273 SMLoc StartLoc, EndLoc;
274 SmallVector<unsigned, 8> Registers;
278 ARMCC::CondCodes Val;
298 ARM_PROC::IFlags Val;
323 unsigned Val; // encoded 8-bit representation
326 /// Combined record for all forms of ARM address expressions.
329 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
331 const MCConstantExpr *OffsetImm; // Offset immediate value
332 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
333 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
334 unsigned ShiftImm; // shift for OffsetReg.
335 unsigned Alignment; // 0 = no alignment specified
336 // n = alignment in bytes (8, 16, or 32)
337 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
343 ARM_AM::ShiftOpc ShiftTy;
352 ARM_AM::ShiftOpc ShiftTy;
358 ARM_AM::ShiftOpc ShiftTy;
371 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
373 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
375 StartLoc = o.StartLoc;
392 case k_DPRRegisterList:
393 case k_SPRRegisterList:
394 Registers = o.Registers;
401 CoprocOption = o.CoprocOption;
409 case k_MemBarrierOpt:
415 case k_PostIndexRegister:
416 PostIdxReg = o.PostIdxReg;
424 case k_ShifterImmediate:
425 ShifterImm = o.ShifterImm;
427 case k_ShiftedRegister:
428 RegShiftedReg = o.RegShiftedReg;
430 case k_ShiftedImmediate:
431 RegShiftedImm = o.RegShiftedImm;
433 case k_RotateImmediate:
436 case k_BitfieldDescriptor:
437 Bitfield = o.Bitfield;
440 VectorIndex = o.VectorIndex;
445 /// getStartLoc - Get the location of the first token of this operand.
446 SMLoc getStartLoc() const { return StartLoc; }
447 /// getEndLoc - Get the location of the last token of this operand.
448 SMLoc getEndLoc() const { return EndLoc; }
450 ARMCC::CondCodes getCondCode() const {
451 assert(Kind == k_CondCode && "Invalid access!");
455 unsigned getCoproc() const {
456 assert((Kind == k_CoprocNum || Kind == k_CoprocReg) && "Invalid access!");
460 StringRef getToken() const {
461 assert(Kind == k_Token && "Invalid access!");
462 return StringRef(Tok.Data, Tok.Length);
465 unsigned getReg() const {
466 assert((Kind == k_Register || Kind == k_CCOut) && "Invalid access!");
470 const SmallVectorImpl<unsigned> &getRegList() const {
471 assert((Kind == k_RegisterList || Kind == k_DPRRegisterList ||
472 Kind == k_SPRRegisterList) && "Invalid access!");
476 const MCExpr *getImm() const {
477 assert(Kind == k_Immediate && "Invalid access!");
481 unsigned getFPImm() const {
482 assert(Kind == k_FPImmediate && "Invalid access!");
486 unsigned getVectorIndex() const {
487 assert(Kind == k_VectorIndex && "Invalid access!");
488 return VectorIndex.Val;
491 ARM_MB::MemBOpt getMemBarrierOpt() const {
492 assert(Kind == k_MemBarrierOpt && "Invalid access!");
496 ARM_PROC::IFlags getProcIFlags() const {
497 assert(Kind == k_ProcIFlags && "Invalid access!");
501 unsigned getMSRMask() const {
502 assert(Kind == k_MSRMask && "Invalid access!");
506 bool isCoprocNum() const { return Kind == k_CoprocNum; }
507 bool isCoprocReg() const { return Kind == k_CoprocReg; }
508 bool isCoprocOption() const { return Kind == k_CoprocOption; }
509 bool isCondCode() const { return Kind == k_CondCode; }
510 bool isCCOut() const { return Kind == k_CCOut; }
511 bool isITMask() const { return Kind == k_ITCondMask; }
512 bool isITCondCode() const { return Kind == k_CondCode; }
513 bool isImm() const { return Kind == k_Immediate; }
514 bool isFPImm() const { return Kind == k_FPImmediate; }
515 bool isImm8s4() const {
516 if (Kind != k_Immediate)
518 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
519 if (!CE) return false;
520 int64_t Value = CE->getValue();
521 return ((Value & 3) == 0) && Value >= -1020 && Value <= 1020;
523 bool isImm0_1020s4() const {
524 if (Kind != k_Immediate)
526 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
527 if (!CE) return false;
528 int64_t Value = CE->getValue();
529 return ((Value & 3) == 0) && Value >= 0 && Value <= 1020;
531 bool isImm0_508s4() const {
532 if (Kind != k_Immediate)
534 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
535 if (!CE) return false;
536 int64_t Value = CE->getValue();
537 return ((Value & 3) == 0) && Value >= 0 && Value <= 508;
539 bool isImm0_255() const {
540 if (Kind != k_Immediate)
542 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
543 if (!CE) return false;
544 int64_t Value = CE->getValue();
545 return Value >= 0 && Value < 256;
547 bool isImm0_7() const {
548 if (Kind != k_Immediate)
550 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
551 if (!CE) return false;
552 int64_t Value = CE->getValue();
553 return Value >= 0 && Value < 8;
555 bool isImm0_15() const {
556 if (Kind != k_Immediate)
558 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
559 if (!CE) return false;
560 int64_t Value = CE->getValue();
561 return Value >= 0 && Value < 16;
563 bool isImm0_31() const {
564 if (Kind != k_Immediate)
566 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
567 if (!CE) return false;
568 int64_t Value = CE->getValue();
569 return Value >= 0 && Value < 32;
571 bool isImm1_16() const {
572 if (Kind != k_Immediate)
574 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
575 if (!CE) return false;
576 int64_t Value = CE->getValue();
577 return Value > 0 && Value < 17;
579 bool isImm1_32() const {
580 if (Kind != k_Immediate)
582 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
583 if (!CE) return false;
584 int64_t Value = CE->getValue();
585 return Value > 0 && Value < 33;
587 bool isImm0_65535() const {
588 if (Kind != k_Immediate)
590 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
591 if (!CE) return false;
592 int64_t Value = CE->getValue();
593 return Value >= 0 && Value < 65536;
595 bool isImm0_65535Expr() const {
596 if (Kind != k_Immediate)
598 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
599 // If it's not a constant expression, it'll generate a fixup and be
601 if (!CE) return true;
602 int64_t Value = CE->getValue();
603 return Value >= 0 && Value < 65536;
605 bool isImm24bit() const {
606 if (Kind != k_Immediate)
608 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
609 if (!CE) return false;
610 int64_t Value = CE->getValue();
611 return Value >= 0 && Value <= 0xffffff;
613 bool isImmThumbSR() const {
614 if (Kind != k_Immediate)
616 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
617 if (!CE) return false;
618 int64_t Value = CE->getValue();
619 return Value > 0 && Value < 33;
621 bool isPKHLSLImm() const {
622 if (Kind != k_Immediate)
624 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
625 if (!CE) return false;
626 int64_t Value = CE->getValue();
627 return Value >= 0 && Value < 32;
629 bool isPKHASRImm() const {
630 if (Kind != k_Immediate)
632 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
633 if (!CE) return false;
634 int64_t Value = CE->getValue();
635 return Value > 0 && Value <= 32;
637 bool isARMSOImm() const {
638 if (Kind != k_Immediate)
640 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
641 if (!CE) return false;
642 int64_t Value = CE->getValue();
643 return ARM_AM::getSOImmVal(Value) != -1;
645 bool isT2SOImm() const {
646 if (Kind != k_Immediate)
648 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
649 if (!CE) return false;
650 int64_t Value = CE->getValue();
651 return ARM_AM::getT2SOImmVal(Value) != -1;
653 bool isSetEndImm() const {
654 if (Kind != k_Immediate)
656 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
657 if (!CE) return false;
658 int64_t Value = CE->getValue();
659 return Value == 1 || Value == 0;
661 bool isReg() const { return Kind == k_Register; }
662 bool isRegList() const { return Kind == k_RegisterList; }
663 bool isDPRRegList() const { return Kind == k_DPRRegisterList; }
664 bool isSPRRegList() const { return Kind == k_SPRRegisterList; }
665 bool isToken() const { return Kind == k_Token; }
666 bool isMemBarrierOpt() const { return Kind == k_MemBarrierOpt; }
667 bool isMemory() const { return Kind == k_Memory; }
668 bool isShifterImm() const { return Kind == k_ShifterImmediate; }
669 bool isRegShiftedReg() const { return Kind == k_ShiftedRegister; }
670 bool isRegShiftedImm() const { return Kind == k_ShiftedImmediate; }
671 bool isRotImm() const { return Kind == k_RotateImmediate; }
672 bool isBitfield() const { return Kind == k_BitfieldDescriptor; }
673 bool isPostIdxRegShifted() const { return Kind == k_PostIndexRegister; }
674 bool isPostIdxReg() const {
675 return Kind == k_PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
677 bool isMemNoOffset(bool alignOK = false) const {
680 // No offset of any kind.
681 return Memory.OffsetRegNum == 0 && Memory.OffsetImm == 0 &&
682 (alignOK || Memory.Alignment == 0);
684 bool isAlignedMemory() const {
685 return isMemNoOffset(true);
687 bool isAddrMode2() const {
688 if (!isMemory() || Memory.Alignment != 0) return false;
689 // Check for register offset.
690 if (Memory.OffsetRegNum) return true;
691 // Immediate offset in range [-4095, 4095].
692 if (!Memory.OffsetImm) return true;
693 int64_t Val = Memory.OffsetImm->getValue();
694 return Val > -4096 && Val < 4096;
696 bool isAM2OffsetImm() const {
697 if (Kind != k_Immediate)
699 // Immediate offset in range [-4095, 4095].
700 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
701 if (!CE) return false;
702 int64_t Val = CE->getValue();
703 return Val > -4096 && Val < 4096;
705 bool isAddrMode3() const {
706 if (!isMemory() || Memory.Alignment != 0) return false;
707 // No shifts are legal for AM3.
708 if (Memory.ShiftType != ARM_AM::no_shift) return false;
709 // Check for register offset.
710 if (Memory.OffsetRegNum) return true;
711 // Immediate offset in range [-255, 255].
712 if (!Memory.OffsetImm) return true;
713 int64_t Val = Memory.OffsetImm->getValue();
714 return Val > -256 && Val < 256;
716 bool isAM3Offset() const {
717 if (Kind != k_Immediate && Kind != k_PostIndexRegister)
719 if (Kind == k_PostIndexRegister)
720 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
721 // Immediate offset in range [-255, 255].
722 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
723 if (!CE) return false;
724 int64_t Val = CE->getValue();
725 // Special case, #-0 is INT32_MIN.
726 return (Val > -256 && Val < 256) || Val == INT32_MIN;
728 bool isAddrMode5() const {
729 if (!isMemory() || Memory.Alignment != 0) return false;
730 // Check for register offset.
731 if (Memory.OffsetRegNum) return false;
732 // Immediate offset in range [-1020, 1020] and a multiple of 4.
733 if (!Memory.OffsetImm) return true;
734 int64_t Val = Memory.OffsetImm->getValue();
735 return (Val >= -1020 && Val <= 1020 && ((Val & 3) == 0)) ||
738 bool isMemTBB() const {
739 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
740 Memory.ShiftType != ARM_AM::no_shift || Memory.Alignment != 0)
744 bool isMemTBH() const {
745 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
746 Memory.ShiftType != ARM_AM::lsl || Memory.ShiftImm != 1 ||
747 Memory.Alignment != 0 )
751 bool isMemRegOffset() const {
752 if (!isMemory() || !Memory.OffsetRegNum || Memory.Alignment != 0)
756 bool isT2MemRegOffset() const {
757 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
758 Memory.Alignment != 0)
760 // Only lsl #{0, 1, 2, 3} allowed.
761 if (Memory.ShiftType == ARM_AM::no_shift)
763 if (Memory.ShiftType != ARM_AM::lsl || Memory.ShiftImm > 3)
767 bool isMemThumbRR() const {
768 // Thumb reg+reg addressing is simple. Just two registers, a base and
769 // an offset. No shifts, negations or any other complicating factors.
770 if (!isMemory() || !Memory.OffsetRegNum || Memory.isNegative ||
771 Memory.ShiftType != ARM_AM::no_shift || Memory.Alignment != 0)
773 return isARMLowRegister(Memory.BaseRegNum) &&
774 (!Memory.OffsetRegNum || isARMLowRegister(Memory.OffsetRegNum));
776 bool isMemThumbRIs4() const {
777 if (!isMemory() || Memory.OffsetRegNum != 0 ||
778 !isARMLowRegister(Memory.BaseRegNum) || Memory.Alignment != 0)
780 // Immediate offset, multiple of 4 in range [0, 124].
781 if (!Memory.OffsetImm) return true;
782 int64_t Val = Memory.OffsetImm->getValue();
783 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
785 bool isMemThumbRIs2() const {
786 if (!isMemory() || Memory.OffsetRegNum != 0 ||
787 !isARMLowRegister(Memory.BaseRegNum) || Memory.Alignment != 0)
789 // Immediate offset, multiple of 4 in range [0, 62].
790 if (!Memory.OffsetImm) return true;
791 int64_t Val = Memory.OffsetImm->getValue();
792 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
794 bool isMemThumbRIs1() const {
795 if (!isMemory() || Memory.OffsetRegNum != 0 ||
796 !isARMLowRegister(Memory.BaseRegNum) || Memory.Alignment != 0)
798 // Immediate offset in range [0, 31].
799 if (!Memory.OffsetImm) return true;
800 int64_t Val = Memory.OffsetImm->getValue();
801 return Val >= 0 && Val <= 31;
803 bool isMemThumbSPI() const {
804 if (!isMemory() || Memory.OffsetRegNum != 0 ||
805 Memory.BaseRegNum != ARM::SP || Memory.Alignment != 0)
807 // Immediate offset, multiple of 4 in range [0, 1020].
808 if (!Memory.OffsetImm) return true;
809 int64_t Val = Memory.OffsetImm->getValue();
810 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
812 bool isMemImm8s4Offset() const {
813 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
815 // Immediate offset a multiple of 4 in range [-1020, 1020].
816 if (!Memory.OffsetImm) return true;
817 int64_t Val = Memory.OffsetImm->getValue();
818 return Val >= -1020 && Val <= 1020 && (Val & 3) == 0;
820 bool isMemImm0_1020s4Offset() const {
821 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
823 // Immediate offset a multiple of 4 in range [0, 1020].
824 if (!Memory.OffsetImm) return true;
825 int64_t Val = Memory.OffsetImm->getValue();
826 return Val >= 0 && Val <= 1020 && (Val & 3) == 0;
828 bool isMemImm8Offset() const {
829 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
831 // Immediate offset in range [-255, 255].
832 if (!Memory.OffsetImm) return true;
833 int64_t Val = Memory.OffsetImm->getValue();
834 return (Val == INT32_MIN) || (Val > -256 && Val < 256);
836 bool isMemPosImm8Offset() const {
837 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
839 // Immediate offset in range [0, 255].
840 if (!Memory.OffsetImm) return true;
841 int64_t Val = Memory.OffsetImm->getValue();
842 return Val >= 0 && Val < 256;
844 bool isMemNegImm8Offset() const {
845 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
847 // Immediate offset in range [-255, -1].
848 if (!Memory.OffsetImm) return true;
849 int64_t Val = Memory.OffsetImm->getValue();
850 return Val > -256 && Val < 0;
852 bool isMemUImm12Offset() const {
853 // If we have an immediate that's not a constant, treat it as a label
854 // reference needing a fixup. If it is a constant, it's something else
856 if (Kind == k_Immediate && !isa<MCConstantExpr>(getImm()))
859 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
861 // Immediate offset in range [0, 4095].
862 if (!Memory.OffsetImm) return true;
863 int64_t Val = Memory.OffsetImm->getValue();
864 return (Val >= 0 && Val < 4096);
866 bool isMemImm12Offset() const {
867 // If we have an immediate that's not a constant, treat it as a label
868 // reference needing a fixup. If it is a constant, it's something else
870 if (Kind == k_Immediate && !isa<MCConstantExpr>(getImm()))
873 if (!isMemory() || Memory.OffsetRegNum != 0 || Memory.Alignment != 0)
875 // Immediate offset in range [-4095, 4095].
876 if (!Memory.OffsetImm) return true;
877 int64_t Val = Memory.OffsetImm->getValue();
878 return (Val > -4096 && Val < 4096) || (Val == INT32_MIN);
880 bool isPostIdxImm8() const {
881 if (Kind != k_Immediate)
883 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
884 if (!CE) return false;
885 int64_t Val = CE->getValue();
886 return (Val > -256 && Val < 256) || (Val == INT32_MIN);
888 bool isPostIdxImm8s4() const {
889 if (Kind != k_Immediate)
891 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
892 if (!CE) return false;
893 int64_t Val = CE->getValue();
894 return ((Val & 3) == 0 && Val >= -1020 && Val <= 1020) ||
898 bool isMSRMask() const { return Kind == k_MSRMask; }
899 bool isProcIFlags() const { return Kind == k_ProcIFlags; }
902 bool isVectorIndex8() const {
903 if (Kind != k_VectorIndex) return false;
904 return VectorIndex.Val < 8;
906 bool isVectorIndex16() const {
907 if (Kind != k_VectorIndex) return false;
908 return VectorIndex.Val < 4;
910 bool isVectorIndex32() const {
911 if (Kind != k_VectorIndex) return false;
912 return VectorIndex.Val < 2;
915 bool isNEONi8splat() const {
916 if (Kind != k_Immediate)
918 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
919 // Must be a constant.
920 if (!CE) return false;
921 int64_t Value = CE->getValue();
922 // i8 value splatted across 8 bytes. The immediate is just the 8 byte
924 return Value >= 0 && Value < 256;
927 bool isNEONi16splat() const {
928 if (Kind != k_Immediate)
930 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
931 // Must be a constant.
932 if (!CE) return false;
933 int64_t Value = CE->getValue();
934 // i16 value in the range [0,255] or [0x0100, 0xff00]
935 return (Value >= 0 && Value < 256) || (Value >= 0x0100 && Value <= 0xff00);
938 bool isNEONi32splat() const {
939 if (Kind != k_Immediate)
941 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
942 // Must be a constant.
943 if (!CE) return false;
944 int64_t Value = CE->getValue();
945 // i32 value with set bits only in one byte X000, 0X00, 00X0, or 000X.
946 return (Value >= 0 && Value < 256) ||
947 (Value >= 0x0100 && Value <= 0xff00) ||
948 (Value >= 0x010000 && Value <= 0xff0000) ||
949 (Value >= 0x01000000 && Value <= 0xff000000);
952 bool isNEONi32vmov() const {
953 if (Kind != k_Immediate)
955 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
956 // Must be a constant.
957 if (!CE) return false;
958 int64_t Value = CE->getValue();
959 // i32 value with set bits only in one byte X000, 0X00, 00X0, or 000X,
960 // for VMOV/VMVN only, 00Xf or 0Xff are also accepted.
961 return (Value >= 0 && Value < 256) ||
962 (Value >= 0x0100 && Value <= 0xff00) ||
963 (Value >= 0x010000 && Value <= 0xff0000) ||
964 (Value >= 0x01000000 && Value <= 0xff000000) ||
965 (Value >= 0x01ff && Value <= 0xffff && (Value & 0xff) == 0xff) ||
966 (Value >= 0x01ffff && Value <= 0xffffff && (Value & 0xffff) == 0xffff);
969 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
970 // Add as immediates when possible. Null MCExpr = 0.
972 Inst.addOperand(MCOperand::CreateImm(0));
973 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
974 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
976 Inst.addOperand(MCOperand::CreateExpr(Expr));
979 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
980 assert(N == 2 && "Invalid number of operands!");
981 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
982 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
983 Inst.addOperand(MCOperand::CreateReg(RegNum));
986 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
987 assert(N == 1 && "Invalid number of operands!");
988 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
991 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
992 assert(N == 1 && "Invalid number of operands!");
993 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
996 void addCoprocOptionOperands(MCInst &Inst, unsigned N) const {
997 assert(N == 1 && "Invalid number of operands!");
998 Inst.addOperand(MCOperand::CreateImm(CoprocOption.Val));
1001 void addITMaskOperands(MCInst &Inst, unsigned N) const {
1002 assert(N == 1 && "Invalid number of operands!");
1003 Inst.addOperand(MCOperand::CreateImm(ITMask.Mask));
1006 void addITCondCodeOperands(MCInst &Inst, unsigned N) const {
1007 assert(N == 1 && "Invalid number of operands!");
1008 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
1011 void addCCOutOperands(MCInst &Inst, unsigned N) const {
1012 assert(N == 1 && "Invalid number of operands!");
1013 Inst.addOperand(MCOperand::CreateReg(getReg()));
1016 void addRegOperands(MCInst &Inst, unsigned N) const {
1017 assert(N == 1 && "Invalid number of operands!");
1018 Inst.addOperand(MCOperand::CreateReg(getReg()));
1021 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
1022 assert(N == 3 && "Invalid number of operands!");
1023 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
1024 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
1025 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
1026 Inst.addOperand(MCOperand::CreateImm(
1027 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
1030 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
1031 assert(N == 2 && "Invalid number of operands!");
1032 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
1033 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
1034 Inst.addOperand(MCOperand::CreateImm(
1035 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
1038 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
1039 assert(N == 1 && "Invalid number of operands!");
1040 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
1044 void addRegListOperands(MCInst &Inst, unsigned N) const {
1045 assert(N == 1 && "Invalid number of operands!");
1046 const SmallVectorImpl<unsigned> &RegList = getRegList();
1047 for (SmallVectorImpl<unsigned>::const_iterator
1048 I = RegList.begin(), E = RegList.end(); I != E; ++I)
1049 Inst.addOperand(MCOperand::CreateReg(*I));
1052 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
1053 addRegListOperands(Inst, N);
1056 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
1057 addRegListOperands(Inst, N);
1060 void addRotImmOperands(MCInst &Inst, unsigned N) const {
1061 assert(N == 1 && "Invalid number of operands!");
1062 // Encoded as val>>3. The printer handles display as 8, 16, 24.
1063 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
1066 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
1067 assert(N == 1 && "Invalid number of operands!");
1068 // Munge the lsb/width into a bitfield mask.
1069 unsigned lsb = Bitfield.LSB;
1070 unsigned width = Bitfield.Width;
1071 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
1072 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
1073 (32 - (lsb + width)));
1074 Inst.addOperand(MCOperand::CreateImm(Mask));
1077 void addImmOperands(MCInst &Inst, unsigned N) const {
1078 assert(N == 1 && "Invalid number of operands!");
1079 addExpr(Inst, getImm());
1082 void addFPImmOperands(MCInst &Inst, unsigned N) const {
1083 assert(N == 1 && "Invalid number of operands!");
1084 Inst.addOperand(MCOperand::CreateImm(getFPImm()));
1087 void addImm8s4Operands(MCInst &Inst, unsigned N) const {
1088 assert(N == 1 && "Invalid number of operands!");
1089 // FIXME: We really want to scale the value here, but the LDRD/STRD
1090 // instruction don't encode operands that way yet.
1091 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1092 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
1095 void addImm0_1020s4Operands(MCInst &Inst, unsigned N) const {
1096 assert(N == 1 && "Invalid number of operands!");
1097 // The immediate is scaled by four in the encoding and is stored
1098 // in the MCInst as such. Lop off the low two bits here.
1099 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1100 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
1103 void addImm0_508s4Operands(MCInst &Inst, unsigned N) const {
1104 assert(N == 1 && "Invalid number of operands!");
1105 // The immediate is scaled by four in the encoding and is stored
1106 // in the MCInst as such. Lop off the low two bits here.
1107 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1108 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
1111 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
1112 assert(N == 1 && "Invalid number of operands!");
1113 addExpr(Inst, getImm());
1116 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
1117 assert(N == 1 && "Invalid number of operands!");
1118 addExpr(Inst, getImm());
1121 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
1122 assert(N == 1 && "Invalid number of operands!");
1123 addExpr(Inst, getImm());
1126 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
1127 assert(N == 1 && "Invalid number of operands!");
1128 addExpr(Inst, getImm());
1131 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
1132 assert(N == 1 && "Invalid number of operands!");
1133 // The constant encodes as the immediate-1, and we store in the instruction
1134 // the bits as encoded, so subtract off one here.
1135 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1136 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
1139 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
1140 assert(N == 1 && "Invalid number of operands!");
1141 // The constant encodes as the immediate-1, and we store in the instruction
1142 // the bits as encoded, so subtract off one here.
1143 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1144 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
1147 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
1148 assert(N == 1 && "Invalid number of operands!");
1149 addExpr(Inst, getImm());
1152 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
1153 assert(N == 1 && "Invalid number of operands!");
1154 addExpr(Inst, getImm());
1157 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
1158 assert(N == 1 && "Invalid number of operands!");
1159 addExpr(Inst, getImm());
1162 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
1163 assert(N == 1 && "Invalid number of operands!");
1164 // The constant encodes as the immediate, except for 32, which encodes as
1166 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1167 unsigned Imm = CE->getValue();
1168 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
1171 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
1172 assert(N == 1 && "Invalid number of operands!");
1173 addExpr(Inst, getImm());
1176 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
1177 assert(N == 1 && "Invalid number of operands!");
1178 // An ASR value of 32 encodes as 0, so that's how we want to add it to
1179 // the instruction as well.
1180 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1181 int Val = CE->getValue();
1182 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
1185 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
1186 assert(N == 1 && "Invalid number of operands!");
1187 addExpr(Inst, getImm());
1190 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
1191 assert(N == 1 && "Invalid number of operands!");
1192 addExpr(Inst, getImm());
1195 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
1196 assert(N == 1 && "Invalid number of operands!");
1197 addExpr(Inst, getImm());
1200 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
1201 assert(N == 1 && "Invalid number of operands!");
1202 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
1205 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
1206 assert(N == 1 && "Invalid number of operands!");
1207 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1210 void addAlignedMemoryOperands(MCInst &Inst, unsigned N) const {
1211 assert(N == 2 && "Invalid number of operands!");
1212 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1213 Inst.addOperand(MCOperand::CreateImm(Memory.Alignment));
1216 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
1217 assert(N == 3 && "Invalid number of operands!");
1218 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1219 if (!Memory.OffsetRegNum) {
1220 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1221 // Special case for #-0
1222 if (Val == INT32_MIN) Val = 0;
1223 if (Val < 0) Val = -Val;
1224 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1226 // For register offset, we encode the shift type and negation flag
1228 Val = ARM_AM::getAM2Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add,
1229 Memory.ShiftImm, Memory.ShiftType);
1231 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1232 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1233 Inst.addOperand(MCOperand::CreateImm(Val));
1236 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
1237 assert(N == 2 && "Invalid number of operands!");
1238 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1239 assert(CE && "non-constant AM2OffsetImm operand!");
1240 int32_t Val = CE->getValue();
1241 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1242 // Special case for #-0
1243 if (Val == INT32_MIN) Val = 0;
1244 if (Val < 0) Val = -Val;
1245 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1246 Inst.addOperand(MCOperand::CreateReg(0));
1247 Inst.addOperand(MCOperand::CreateImm(Val));
1250 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
1251 assert(N == 3 && "Invalid number of operands!");
1252 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1253 if (!Memory.OffsetRegNum) {
1254 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1255 // Special case for #-0
1256 if (Val == INT32_MIN) Val = 0;
1257 if (Val < 0) Val = -Val;
1258 Val = ARM_AM::getAM3Opc(AddSub, Val);
1260 // For register offset, we encode the shift type and negation flag
1262 Val = ARM_AM::getAM3Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
1264 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1265 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1266 Inst.addOperand(MCOperand::CreateImm(Val));
1269 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
1270 assert(N == 2 && "Invalid number of operands!");
1271 if (Kind == k_PostIndexRegister) {
1273 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
1274 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1275 Inst.addOperand(MCOperand::CreateImm(Val));
1280 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
1281 int32_t Val = CE->getValue();
1282 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1283 // Special case for #-0
1284 if (Val == INT32_MIN) Val = 0;
1285 if (Val < 0) Val = -Val;
1286 Val = ARM_AM::getAM3Opc(AddSub, Val);
1287 Inst.addOperand(MCOperand::CreateReg(0));
1288 Inst.addOperand(MCOperand::CreateImm(Val));
1291 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
1292 assert(N == 2 && "Invalid number of operands!");
1293 // The lower two bits are always zero and as such are not encoded.
1294 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() / 4 : 0;
1295 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1296 // Special case for #-0
1297 if (Val == INT32_MIN) Val = 0;
1298 if (Val < 0) Val = -Val;
1299 Val = ARM_AM::getAM5Opc(AddSub, Val);
1300 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1301 Inst.addOperand(MCOperand::CreateImm(Val));
1304 void addMemImm8s4OffsetOperands(MCInst &Inst, unsigned N) const {
1305 assert(N == 2 && "Invalid number of operands!");
1306 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1307 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1308 Inst.addOperand(MCOperand::CreateImm(Val));
1311 void addMemImm0_1020s4OffsetOperands(MCInst &Inst, unsigned N) const {
1312 assert(N == 2 && "Invalid number of operands!");
1313 // The lower two bits are always zero and as such are not encoded.
1314 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() / 4 : 0;
1315 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1316 Inst.addOperand(MCOperand::CreateImm(Val));
1319 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1320 assert(N == 2 && "Invalid number of operands!");
1321 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1322 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1323 Inst.addOperand(MCOperand::CreateImm(Val));
1326 void addMemPosImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1327 addMemImm8OffsetOperands(Inst, N);
1330 void addMemNegImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1331 addMemImm8OffsetOperands(Inst, N);
1334 void addMemUImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1335 assert(N == 2 && "Invalid number of operands!");
1336 // If this is an immediate, it's a label reference.
1337 if (Kind == k_Immediate) {
1338 addExpr(Inst, getImm());
1339 Inst.addOperand(MCOperand::CreateImm(0));
1343 // Otherwise, it's a normal memory reg+offset.
1344 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1345 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1346 Inst.addOperand(MCOperand::CreateImm(Val));
1349 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1350 assert(N == 2 && "Invalid number of operands!");
1351 // If this is an immediate, it's a label reference.
1352 if (Kind == k_Immediate) {
1353 addExpr(Inst, getImm());
1354 Inst.addOperand(MCOperand::CreateImm(0));
1358 // Otherwise, it's a normal memory reg+offset.
1359 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1360 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1361 Inst.addOperand(MCOperand::CreateImm(Val));
1364 void addMemTBBOperands(MCInst &Inst, unsigned N) const {
1365 assert(N == 2 && "Invalid number of operands!");
1366 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1367 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1370 void addMemTBHOperands(MCInst &Inst, unsigned N) const {
1371 assert(N == 2 && "Invalid number of operands!");
1372 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1373 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1376 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1377 assert(N == 3 && "Invalid number of operands!");
1378 unsigned Val = ARM_AM::getAM2Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add,
1379 Memory.ShiftImm, Memory.ShiftType);
1380 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1381 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1382 Inst.addOperand(MCOperand::CreateImm(Val));
1385 void addT2MemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1386 assert(N == 3 && "Invalid number of operands!");
1387 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1388 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1389 Inst.addOperand(MCOperand::CreateImm(Memory.ShiftImm));
1392 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1393 assert(N == 2 && "Invalid number of operands!");
1394 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1395 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1398 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1399 assert(N == 2 && "Invalid number of operands!");
1400 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 4) : 0;
1401 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1402 Inst.addOperand(MCOperand::CreateImm(Val));
1405 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1406 assert(N == 2 && "Invalid number of operands!");
1407 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 2) : 0;
1408 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1409 Inst.addOperand(MCOperand::CreateImm(Val));
1412 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1413 assert(N == 2 && "Invalid number of operands!");
1414 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue()) : 0;
1415 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1416 Inst.addOperand(MCOperand::CreateImm(Val));
1419 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1420 assert(N == 2 && "Invalid number of operands!");
1421 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 4) : 0;
1422 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1423 Inst.addOperand(MCOperand::CreateImm(Val));
1426 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1427 assert(N == 1 && "Invalid number of operands!");
1428 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1429 assert(CE && "non-constant post-idx-imm8 operand!");
1430 int Imm = CE->getValue();
1431 bool isAdd = Imm >= 0;
1432 if (Imm == INT32_MIN) Imm = 0;
1433 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1434 Inst.addOperand(MCOperand::CreateImm(Imm));
1437 void addPostIdxImm8s4Operands(MCInst &Inst, unsigned N) const {
1438 assert(N == 1 && "Invalid number of operands!");
1439 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1440 assert(CE && "non-constant post-idx-imm8s4 operand!");
1441 int Imm = CE->getValue();
1442 bool isAdd = Imm >= 0;
1443 if (Imm == INT32_MIN) Imm = 0;
1444 // Immediate is scaled by 4.
1445 Imm = ((Imm < 0 ? -Imm : Imm) / 4) | (int)isAdd << 8;
1446 Inst.addOperand(MCOperand::CreateImm(Imm));
1449 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1450 assert(N == 2 && "Invalid number of operands!");
1451 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1452 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1455 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1456 assert(N == 2 && "Invalid number of operands!");
1457 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1458 // The sign, shift type, and shift amount are encoded in a single operand
1459 // using the AM2 encoding helpers.
1460 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1461 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1462 PostIdxReg.ShiftTy);
1463 Inst.addOperand(MCOperand::CreateImm(Imm));
1466 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1467 assert(N == 1 && "Invalid number of operands!");
1468 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1471 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1472 assert(N == 1 && "Invalid number of operands!");
1473 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1476 void addVectorIndex8Operands(MCInst &Inst, unsigned N) const {
1477 assert(N == 1 && "Invalid number of operands!");
1478 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1481 void addVectorIndex16Operands(MCInst &Inst, unsigned N) const {
1482 assert(N == 1 && "Invalid number of operands!");
1483 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1486 void addVectorIndex32Operands(MCInst &Inst, unsigned N) const {
1487 assert(N == 1 && "Invalid number of operands!");
1488 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1491 void addNEONi8splatOperands(MCInst &Inst, unsigned N) const {
1492 assert(N == 1 && "Invalid number of operands!");
1493 // The immediate encodes the type of constant as well as the value.
1494 // Mask in that this is an i8 splat.
1495 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1496 Inst.addOperand(MCOperand::CreateImm(CE->getValue() | 0xe00));
1499 void addNEONi16splatOperands(MCInst &Inst, unsigned N) const {
1500 assert(N == 1 && "Invalid number of operands!");
1501 // The immediate encodes the type of constant as well as the value.
1502 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1503 unsigned Value = CE->getValue();
1505 Value = (Value >> 8) | 0xa00;
1508 Inst.addOperand(MCOperand::CreateImm(Value));
1511 void addNEONi32splatOperands(MCInst &Inst, unsigned N) const {
1512 assert(N == 1 && "Invalid number of operands!");
1513 // The immediate encodes the type of constant as well as the value.
1514 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1515 unsigned Value = CE->getValue();
1516 if (Value >= 256 && Value <= 0xff00)
1517 Value = (Value >> 8) | 0x200;
1518 else if (Value > 0xffff && Value <= 0xff0000)
1519 Value = (Value >> 16) | 0x400;
1520 else if (Value > 0xffffff)
1521 Value = (Value >> 24) | 0x600;
1522 Inst.addOperand(MCOperand::CreateImm(Value));
1525 void addNEONi32vmovOperands(MCInst &Inst, unsigned N) const {
1526 assert(N == 1 && "Invalid number of operands!");
1527 // The immediate encodes the type of constant as well as the value.
1528 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1529 unsigned Value = CE->getValue();
1530 if (Value >= 256 && Value <= 0xffff)
1531 Value = (Value >> 8) | ((Value & 0xff) ? 0xc00 : 0x200);
1532 else if (Value > 0xffff && Value <= 0xffffff)
1533 Value = (Value >> 16) | ((Value & 0xff) ? 0xd00 : 0x400);
1534 else if (Value > 0xffffff)
1535 Value = (Value >> 24) | 0x600;
1536 Inst.addOperand(MCOperand::CreateImm(Value));
1539 virtual void print(raw_ostream &OS) const;
1541 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1542 ARMOperand *Op = new ARMOperand(k_ITCondMask);
1543 Op->ITMask.Mask = Mask;
1549 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1550 ARMOperand *Op = new ARMOperand(k_CondCode);
1557 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1558 ARMOperand *Op = new ARMOperand(k_CoprocNum);
1559 Op->Cop.Val = CopVal;
1565 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1566 ARMOperand *Op = new ARMOperand(k_CoprocReg);
1567 Op->Cop.Val = CopVal;
1573 static ARMOperand *CreateCoprocOption(unsigned Val, SMLoc S, SMLoc E) {
1574 ARMOperand *Op = new ARMOperand(k_CoprocOption);
1581 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1582 ARMOperand *Op = new ARMOperand(k_CCOut);
1583 Op->Reg.RegNum = RegNum;
1589 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1590 ARMOperand *Op = new ARMOperand(k_Token);
1591 Op->Tok.Data = Str.data();
1592 Op->Tok.Length = Str.size();
1598 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1599 ARMOperand *Op = new ARMOperand(k_Register);
1600 Op->Reg.RegNum = RegNum;
1606 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1611 ARMOperand *Op = new ARMOperand(k_ShiftedRegister);
1612 Op->RegShiftedReg.ShiftTy = ShTy;
1613 Op->RegShiftedReg.SrcReg = SrcReg;
1614 Op->RegShiftedReg.ShiftReg = ShiftReg;
1615 Op->RegShiftedReg.ShiftImm = ShiftImm;
1621 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1625 ARMOperand *Op = new ARMOperand(k_ShiftedImmediate);
1626 Op->RegShiftedImm.ShiftTy = ShTy;
1627 Op->RegShiftedImm.SrcReg = SrcReg;
1628 Op->RegShiftedImm.ShiftImm = ShiftImm;
1634 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1636 ARMOperand *Op = new ARMOperand(k_ShifterImmediate);
1637 Op->ShifterImm.isASR = isASR;
1638 Op->ShifterImm.Imm = Imm;
1644 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1645 ARMOperand *Op = new ARMOperand(k_RotateImmediate);
1646 Op->RotImm.Imm = Imm;
1652 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1654 ARMOperand *Op = new ARMOperand(k_BitfieldDescriptor);
1655 Op->Bitfield.LSB = LSB;
1656 Op->Bitfield.Width = Width;
1663 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1664 SMLoc StartLoc, SMLoc EndLoc) {
1665 KindTy Kind = k_RegisterList;
1667 if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Regs.front().first))
1668 Kind = k_DPRRegisterList;
1669 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].
1670 contains(Regs.front().first))
1671 Kind = k_SPRRegisterList;
1673 ARMOperand *Op = new ARMOperand(Kind);
1674 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1675 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1676 Op->Registers.push_back(I->first);
1677 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1678 Op->StartLoc = StartLoc;
1679 Op->EndLoc = EndLoc;
1683 static ARMOperand *CreateVectorIndex(unsigned Idx, SMLoc S, SMLoc E,
1685 ARMOperand *Op = new ARMOperand(k_VectorIndex);
1686 Op->VectorIndex.Val = Idx;
1692 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1693 ARMOperand *Op = new ARMOperand(k_Immediate);
1700 static ARMOperand *CreateFPImm(unsigned Val, SMLoc S, MCContext &Ctx) {
1701 ARMOperand *Op = new ARMOperand(k_FPImmediate);
1702 Op->FPImm.Val = Val;
1708 static ARMOperand *CreateMem(unsigned BaseRegNum,
1709 const MCConstantExpr *OffsetImm,
1710 unsigned OffsetRegNum,
1711 ARM_AM::ShiftOpc ShiftType,
1716 ARMOperand *Op = new ARMOperand(k_Memory);
1717 Op->Memory.BaseRegNum = BaseRegNum;
1718 Op->Memory.OffsetImm = OffsetImm;
1719 Op->Memory.OffsetRegNum = OffsetRegNum;
1720 Op->Memory.ShiftType = ShiftType;
1721 Op->Memory.ShiftImm = ShiftImm;
1722 Op->Memory.Alignment = Alignment;
1723 Op->Memory.isNegative = isNegative;
1729 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1730 ARM_AM::ShiftOpc ShiftTy,
1733 ARMOperand *Op = new ARMOperand(k_PostIndexRegister);
1734 Op->PostIdxReg.RegNum = RegNum;
1735 Op->PostIdxReg.isAdd = isAdd;
1736 Op->PostIdxReg.ShiftTy = ShiftTy;
1737 Op->PostIdxReg.ShiftImm = ShiftImm;
1743 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1744 ARMOperand *Op = new ARMOperand(k_MemBarrierOpt);
1745 Op->MBOpt.Val = Opt;
1751 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1752 ARMOperand *Op = new ARMOperand(k_ProcIFlags);
1753 Op->IFlags.Val = IFlags;
1759 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1760 ARMOperand *Op = new ARMOperand(k_MSRMask);
1761 Op->MMask.Val = MMask;
1768 } // end anonymous namespace.
1770 void ARMOperand::print(raw_ostream &OS) const {
1773 OS << "<fpimm " << getFPImm() << "(" << ARM_AM::getFPImmFloat(getFPImm())
1777 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1780 OS << "<ccout " << getReg() << ">";
1782 case k_ITCondMask: {
1783 static char MaskStr[][6] = { "()", "(t)", "(e)", "(tt)", "(et)", "(te)",
1784 "(ee)", "(ttt)", "(ett)", "(tet)", "(eet)", "(tte)", "(ete)",
1786 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1787 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1791 OS << "<coprocessor number: " << getCoproc() << ">";
1794 OS << "<coprocessor register: " << getCoproc() << ">";
1796 case k_CoprocOption:
1797 OS << "<coprocessor option: " << CoprocOption.Val << ">";
1800 OS << "<mask: " << getMSRMask() << ">";
1803 getImm()->print(OS);
1805 case k_MemBarrierOpt:
1806 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1810 << " base:" << Memory.BaseRegNum;
1813 case k_PostIndexRegister:
1814 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1815 << PostIdxReg.RegNum;
1816 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1817 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1818 << PostIdxReg.ShiftImm;
1821 case k_ProcIFlags: {
1822 OS << "<ARM_PROC::";
1823 unsigned IFlags = getProcIFlags();
1824 for (int i=2; i >= 0; --i)
1825 if (IFlags & (1 << i))
1826 OS << ARM_PROC::IFlagsToString(1 << i);
1831 OS << "<register " << getReg() << ">";
1833 case k_ShifterImmediate:
1834 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1835 << " #" << ShifterImm.Imm << ">";
1837 case k_ShiftedRegister:
1838 OS << "<so_reg_reg "
1839 << RegShiftedReg.SrcReg
1840 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1841 << ", " << RegShiftedReg.ShiftReg << ", "
1842 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1845 case k_ShiftedImmediate:
1846 OS << "<so_reg_imm "
1847 << RegShiftedImm.SrcReg
1848 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1849 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1852 case k_RotateImmediate:
1853 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1855 case k_BitfieldDescriptor:
1856 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1857 << ", width: " << Bitfield.Width << ">";
1859 case k_RegisterList:
1860 case k_DPRRegisterList:
1861 case k_SPRRegisterList: {
1862 OS << "<register_list ";
1864 const SmallVectorImpl<unsigned> &RegList = getRegList();
1865 for (SmallVectorImpl<unsigned>::const_iterator
1866 I = RegList.begin(), E = RegList.end(); I != E; ) {
1868 if (++I < E) OS << ", ";
1875 OS << "'" << getToken() << "'";
1878 OS << "<vectorindex " << getVectorIndex() << ">";
1883 /// @name Auto-generated Match Functions
1886 static unsigned MatchRegisterName(StringRef Name);
1890 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1891 SMLoc &StartLoc, SMLoc &EndLoc) {
1892 RegNo = tryParseRegister();
1894 return (RegNo == (unsigned)-1);
1897 /// Try to parse a register name. The token must be an Identifier when called,
1898 /// and if it is a register name the token is eaten and the register number is
1899 /// returned. Otherwise return -1.
1901 int ARMAsmParser::tryParseRegister() {
1902 const AsmToken &Tok = Parser.getTok();
1903 if (Tok.isNot(AsmToken::Identifier)) return -1;
1905 // FIXME: Validate register for the current architecture; we have to do
1906 // validation later, so maybe there is no need for this here.
1907 std::string upperCase = Tok.getString().str();
1908 std::string lowerCase = LowercaseString(upperCase);
1909 unsigned RegNum = MatchRegisterName(lowerCase);
1911 RegNum = StringSwitch<unsigned>(lowerCase)
1912 .Case("r13", ARM::SP)
1913 .Case("r14", ARM::LR)
1914 .Case("r15", ARM::PC)
1915 .Case("ip", ARM::R12)
1918 if (!RegNum) return -1;
1920 Parser.Lex(); // Eat identifier token.
1923 // Also check for an index operand. This is only legal for vector registers,
1924 // but that'll get caught OK in operand matching, so we don't need to
1925 // explicitly filter everything else out here.
1926 if (Parser.getTok().is(AsmToken::LBrac)) {
1927 SMLoc SIdx = Parser.getTok().getLoc();
1928 Parser.Lex(); // Eat left bracket token.
1930 const MCExpr *ImmVal;
1931 if (getParser().ParseExpression(ImmVal))
1932 return MatchOperand_ParseFail;
1933 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
1935 TokError("immediate value expected for vector index");
1936 return MatchOperand_ParseFail;
1939 SMLoc E = Parser.getTok().getLoc();
1940 if (Parser.getTok().isNot(AsmToken::RBrac)) {
1941 Error(E, "']' expected");
1942 return MatchOperand_ParseFail;
1945 Parser.Lex(); // Eat right bracket token.
1947 Operands.push_back(ARMOperand::CreateVectorIndex(MCE->getValue(),
1956 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1957 // If a recoverable error occurs, return 1. If an irrecoverable error
1958 // occurs, return -1. An irrecoverable error is one where tokens have been
1959 // consumed in the process of trying to parse the shifter (i.e., when it is
1960 // indeed a shifter operand, but malformed).
1961 int ARMAsmParser::tryParseShiftRegister(
1962 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1963 SMLoc S = Parser.getTok().getLoc();
1964 const AsmToken &Tok = Parser.getTok();
1965 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1967 std::string upperCase = Tok.getString().str();
1968 std::string lowerCase = LowercaseString(upperCase);
1969 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1970 .Case("lsl", ARM_AM::lsl)
1971 .Case("lsr", ARM_AM::lsr)
1972 .Case("asr", ARM_AM::asr)
1973 .Case("ror", ARM_AM::ror)
1974 .Case("rrx", ARM_AM::rrx)
1975 .Default(ARM_AM::no_shift);
1977 if (ShiftTy == ARM_AM::no_shift)
1980 Parser.Lex(); // Eat the operator.
1982 // The source register for the shift has already been added to the
1983 // operand list, so we need to pop it off and combine it into the shifted
1984 // register operand instead.
1985 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1986 if (!PrevOp->isReg())
1987 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1988 int SrcReg = PrevOp->getReg();
1991 if (ShiftTy == ARM_AM::rrx) {
1992 // RRX Doesn't have an explicit shift amount. The encoder expects
1993 // the shift register to be the same as the source register. Seems odd,
1997 // Figure out if this is shifted by a constant or a register (for non-RRX).
1998 if (Parser.getTok().is(AsmToken::Hash)) {
1999 Parser.Lex(); // Eat hash.
2000 SMLoc ImmLoc = Parser.getTok().getLoc();
2001 const MCExpr *ShiftExpr = 0;
2002 if (getParser().ParseExpression(ShiftExpr)) {
2003 Error(ImmLoc, "invalid immediate shift value");
2006 // The expression must be evaluatable as an immediate.
2007 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
2009 Error(ImmLoc, "invalid immediate shift value");
2012 // Range check the immediate.
2013 // lsl, ror: 0 <= imm <= 31
2014 // lsr, asr: 0 <= imm <= 32
2015 Imm = CE->getValue();
2017 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
2018 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
2019 Error(ImmLoc, "immediate shift value out of range");
2022 } else if (Parser.getTok().is(AsmToken::Identifier)) {
2023 ShiftReg = tryParseRegister();
2024 SMLoc L = Parser.getTok().getLoc();
2025 if (ShiftReg == -1) {
2026 Error (L, "expected immediate or register in shift operand");
2030 Error (Parser.getTok().getLoc(),
2031 "expected immediate or register in shift operand");
2036 if (ShiftReg && ShiftTy != ARM_AM::rrx)
2037 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
2039 S, Parser.getTok().getLoc()));
2041 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
2042 S, Parser.getTok().getLoc()));
2048 /// Try to parse a register name. The token must be an Identifier when called.
2049 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
2050 /// if there is a "writeback". 'true' if it's not a register.
2052 /// TODO this is likely to change to allow different register types and or to
2053 /// parse for a specific register type.
2055 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2056 SMLoc S = Parser.getTok().getLoc();
2057 int RegNo = tryParseRegister();
2061 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
2063 const AsmToken &ExclaimTok = Parser.getTok();
2064 if (ExclaimTok.is(AsmToken::Exclaim)) {
2065 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
2066 ExclaimTok.getLoc()));
2067 Parser.Lex(); // Eat exclaim token
2071 // Also check for an index operand. This is only legal for vector registers,
2072 // but that'll get caught OK in operand matching, so we don't need to
2073 // explicitly filter everything else out here.
2074 if (Parser.getTok().is(AsmToken::LBrac)) {
2075 SMLoc SIdx = Parser.getTok().getLoc();
2076 Parser.Lex(); // Eat left bracket token.
2078 const MCExpr *ImmVal;
2079 if (getParser().ParseExpression(ImmVal))
2080 return MatchOperand_ParseFail;
2081 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
2083 TokError("immediate value expected for vector index");
2084 return MatchOperand_ParseFail;
2087 SMLoc E = Parser.getTok().getLoc();
2088 if (Parser.getTok().isNot(AsmToken::RBrac)) {
2089 Error(E, "']' expected");
2090 return MatchOperand_ParseFail;
2093 Parser.Lex(); // Eat right bracket token.
2095 Operands.push_back(ARMOperand::CreateVectorIndex(MCE->getValue(),
2103 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
2104 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
2106 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
2107 // Use the same layout as the tablegen'erated register name matcher. Ugly,
2109 switch (Name.size()) {
2112 if (Name[0] != CoprocOp)
2129 if (Name[0] != CoprocOp || Name[1] != '1')
2133 case '0': return 10;
2134 case '1': return 11;
2135 case '2': return 12;
2136 case '3': return 13;
2137 case '4': return 14;
2138 case '5': return 15;
2146 /// parseITCondCode - Try to parse a condition code for an IT instruction.
2147 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2148 parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2149 SMLoc S = Parser.getTok().getLoc();
2150 const AsmToken &Tok = Parser.getTok();
2151 if (!Tok.is(AsmToken::Identifier))
2152 return MatchOperand_NoMatch;
2153 unsigned CC = StringSwitch<unsigned>(Tok.getString())
2154 .Case("eq", ARMCC::EQ)
2155 .Case("ne", ARMCC::NE)
2156 .Case("hs", ARMCC::HS)
2157 .Case("cs", ARMCC::HS)
2158 .Case("lo", ARMCC::LO)
2159 .Case("cc", ARMCC::LO)
2160 .Case("mi", ARMCC::MI)
2161 .Case("pl", ARMCC::PL)
2162 .Case("vs", ARMCC::VS)
2163 .Case("vc", ARMCC::VC)
2164 .Case("hi", ARMCC::HI)
2165 .Case("ls", ARMCC::LS)
2166 .Case("ge", ARMCC::GE)
2167 .Case("lt", ARMCC::LT)
2168 .Case("gt", ARMCC::GT)
2169 .Case("le", ARMCC::LE)
2170 .Case("al", ARMCC::AL)
2173 return MatchOperand_NoMatch;
2174 Parser.Lex(); // Eat the token.
2176 Operands.push_back(ARMOperand::CreateCondCode(ARMCC::CondCodes(CC), S));
2178 return MatchOperand_Success;
2181 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
2182 /// token must be an Identifier when called, and if it is a coprocessor
2183 /// number, the token is eaten and the operand is added to the operand list.
2184 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2185 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2186 SMLoc S = Parser.getTok().getLoc();
2187 const AsmToken &Tok = Parser.getTok();
2188 if (Tok.isNot(AsmToken::Identifier))
2189 return MatchOperand_NoMatch;
2191 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
2193 return MatchOperand_NoMatch;
2195 Parser.Lex(); // Eat identifier token.
2196 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
2197 return MatchOperand_Success;
2200 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
2201 /// token must be an Identifier when called, and if it is a coprocessor
2202 /// number, the token is eaten and the operand is added to the operand list.
2203 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2204 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2205 SMLoc S = Parser.getTok().getLoc();
2206 const AsmToken &Tok = Parser.getTok();
2207 if (Tok.isNot(AsmToken::Identifier))
2208 return MatchOperand_NoMatch;
2210 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
2212 return MatchOperand_NoMatch;
2214 Parser.Lex(); // Eat identifier token.
2215 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
2216 return MatchOperand_Success;
2219 /// parseCoprocOptionOperand - Try to parse an coprocessor option operand.
2220 /// coproc_option : '{' imm0_255 '}'
2221 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2222 parseCoprocOptionOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2223 SMLoc S = Parser.getTok().getLoc();
2225 // If this isn't a '{', this isn't a coprocessor immediate operand.
2226 if (Parser.getTok().isNot(AsmToken::LCurly))
2227 return MatchOperand_NoMatch;
2228 Parser.Lex(); // Eat the '{'
2231 SMLoc Loc = Parser.getTok().getLoc();
2232 if (getParser().ParseExpression(Expr)) {
2233 Error(Loc, "illegal expression");
2234 return MatchOperand_ParseFail;
2236 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2237 if (!CE || CE->getValue() < 0 || CE->getValue() > 255) {
2238 Error(Loc, "coprocessor option must be an immediate in range [0, 255]");
2239 return MatchOperand_ParseFail;
2241 int Val = CE->getValue();
2243 // Check for and consume the closing '}'
2244 if (Parser.getTok().isNot(AsmToken::RCurly))
2245 return MatchOperand_ParseFail;
2246 SMLoc E = Parser.getTok().getLoc();
2247 Parser.Lex(); // Eat the '}'
2249 Operands.push_back(ARMOperand::CreateCoprocOption(Val, S, E));
2250 return MatchOperand_Success;
2253 // For register list parsing, we need to map from raw GPR register numbering
2254 // to the enumeration values. The enumeration values aren't sorted by
2255 // register number due to our using "sp", "lr" and "pc" as canonical names.
2256 static unsigned getNextRegister(unsigned Reg) {
2257 // If this is a GPR, we need to do it manually, otherwise we can rely
2258 // on the sort ordering of the enumeration since the other reg-classes
2260 if (!ARMMCRegisterClasses[ARM::GPRRegClassID].contains(Reg))
2263 default: assert(0 && "Invalid GPR number!");
2264 case ARM::R0: return ARM::R1; case ARM::R1: return ARM::R2;
2265 case ARM::R2: return ARM::R3; case ARM::R3: return ARM::R4;
2266 case ARM::R4: return ARM::R5; case ARM::R5: return ARM::R6;
2267 case ARM::R6: return ARM::R7; case ARM::R7: return ARM::R8;
2268 case ARM::R8: return ARM::R9; case ARM::R9: return ARM::R10;
2269 case ARM::R10: return ARM::R11; case ARM::R11: return ARM::R12;
2270 case ARM::R12: return ARM::SP; case ARM::SP: return ARM::LR;
2271 case ARM::LR: return ARM::PC; case ARM::PC: return ARM::R0;
2275 /// Parse a register list.
2277 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2278 assert(Parser.getTok().is(AsmToken::LCurly) &&
2279 "Token is not a Left Curly Brace");
2280 SMLoc S = Parser.getTok().getLoc();
2281 Parser.Lex(); // Eat '{' token.
2282 SMLoc RegLoc = Parser.getTok().getLoc();
2284 // Check the first register in the list to see what register class
2285 // this is a list of.
2286 int Reg = tryParseRegister();
2288 return Error(RegLoc, "register expected");
2290 MCRegisterClass *RC;
2291 if (ARMMCRegisterClasses[ARM::GPRRegClassID].contains(Reg))
2292 RC = &ARMMCRegisterClasses[ARM::GPRRegClassID];
2293 else if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg))
2294 RC = &ARMMCRegisterClasses[ARM::DPRRegClassID];
2295 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].contains(Reg))
2296 RC = &ARMMCRegisterClasses[ARM::SPRRegClassID];
2298 return Error(RegLoc, "invalid register in register list");
2300 // The reglist instructions have at most 16 registers, so reserve
2301 // space for that many.
2302 SmallVector<std::pair<unsigned, SMLoc>, 16> Registers;
2303 // Store the first register.
2304 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2306 // This starts immediately after the first register token in the list,
2307 // so we can see either a comma or a minus (range separator) as a legal
2309 while (Parser.getTok().is(AsmToken::Comma) ||
2310 Parser.getTok().is(AsmToken::Minus)) {
2311 if (Parser.getTok().is(AsmToken::Minus)) {
2312 Parser.Lex(); // Eat the comma.
2313 SMLoc EndLoc = Parser.getTok().getLoc();
2314 int EndReg = tryParseRegister();
2316 return Error(EndLoc, "register expected");
2317 // If the register is the same as the start reg, there's nothing
2321 // The register must be in the same register class as the first.
2322 if (!RC->contains(EndReg))
2323 return Error(EndLoc, "invalid register in register list");
2324 // Ranges must go from low to high.
2325 if (getARMRegisterNumbering(Reg) > getARMRegisterNumbering(EndReg))
2326 return Error(EndLoc, "bad range in register list");
2328 // Add all the registers in the range to the register list.
2329 while (Reg != EndReg) {
2330 Reg = getNextRegister(Reg);
2331 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2335 Parser.Lex(); // Eat the comma.
2336 RegLoc = Parser.getTok().getLoc();
2338 Reg = tryParseRegister();
2340 return Error(RegLoc, "register expected");
2341 // The register must be in the same register class as the first.
2342 if (!RC->contains(Reg))
2343 return Error(RegLoc, "invalid register in register list");
2344 // List must be monotonically increasing.
2345 if (getARMRegisterNumbering(Reg) <= getARMRegisterNumbering(OldReg))
2346 return Error(RegLoc, "register list not in ascending order");
2347 // VFP register lists must also be contiguous.
2348 // It's OK to use the enumeration values directly here rather, as the
2349 // VFP register classes have the enum sorted properly.
2350 if (RC != &ARMMCRegisterClasses[ARM::GPRRegClassID] &&
2352 return Error(RegLoc, "non-contiguous register range");
2353 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2356 SMLoc E = Parser.getTok().getLoc();
2357 if (Parser.getTok().isNot(AsmToken::RCurly))
2358 return Error(E, "'}' expected");
2359 Parser.Lex(); // Eat '}' token.
2361 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
2365 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
2366 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2367 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2368 SMLoc S = Parser.getTok().getLoc();
2369 const AsmToken &Tok = Parser.getTok();
2370 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2371 StringRef OptStr = Tok.getString();
2373 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
2374 .Case("sy", ARM_MB::SY)
2375 .Case("st", ARM_MB::ST)
2376 .Case("sh", ARM_MB::ISH)
2377 .Case("ish", ARM_MB::ISH)
2378 .Case("shst", ARM_MB::ISHST)
2379 .Case("ishst", ARM_MB::ISHST)
2380 .Case("nsh", ARM_MB::NSH)
2381 .Case("un", ARM_MB::NSH)
2382 .Case("nshst", ARM_MB::NSHST)
2383 .Case("unst", ARM_MB::NSHST)
2384 .Case("osh", ARM_MB::OSH)
2385 .Case("oshst", ARM_MB::OSHST)
2389 return MatchOperand_NoMatch;
2391 Parser.Lex(); // Eat identifier token.
2392 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
2393 return MatchOperand_Success;
2396 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
2397 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2398 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2399 SMLoc S = Parser.getTok().getLoc();
2400 const AsmToken &Tok = Parser.getTok();
2401 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2402 StringRef IFlagsStr = Tok.getString();
2404 // An iflags string of "none" is interpreted to mean that none of the AIF
2405 // bits are set. Not a terribly useful instruction, but a valid encoding.
2406 unsigned IFlags = 0;
2407 if (IFlagsStr != "none") {
2408 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
2409 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
2410 .Case("a", ARM_PROC::A)
2411 .Case("i", ARM_PROC::I)
2412 .Case("f", ARM_PROC::F)
2415 // If some specific iflag is already set, it means that some letter is
2416 // present more than once, this is not acceptable.
2417 if (Flag == ~0U || (IFlags & Flag))
2418 return MatchOperand_NoMatch;
2424 Parser.Lex(); // Eat identifier token.
2425 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
2426 return MatchOperand_Success;
2429 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
2430 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2431 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2432 SMLoc S = Parser.getTok().getLoc();
2433 const AsmToken &Tok = Parser.getTok();
2434 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2435 StringRef Mask = Tok.getString();
2438 // See ARMv6-M 10.1.1
2439 unsigned FlagsVal = StringSwitch<unsigned>(Mask)
2449 .Case("primask", 16)
2450 .Case("basepri", 17)
2451 .Case("basepri_max", 18)
2452 .Case("faultmask", 19)
2453 .Case("control", 20)
2456 if (FlagsVal == ~0U)
2457 return MatchOperand_NoMatch;
2459 if (!hasV7Ops() && FlagsVal >= 17 && FlagsVal <= 19)
2460 // basepri, basepri_max and faultmask only valid for V7m.
2461 return MatchOperand_NoMatch;
2463 Parser.Lex(); // Eat identifier token.
2464 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2465 return MatchOperand_Success;
2468 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
2469 size_t Start = 0, Next = Mask.find('_');
2470 StringRef Flags = "";
2471 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
2472 if (Next != StringRef::npos)
2473 Flags = Mask.slice(Next+1, Mask.size());
2475 // FlagsVal contains the complete mask:
2477 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2478 unsigned FlagsVal = 0;
2480 if (SpecReg == "apsr") {
2481 FlagsVal = StringSwitch<unsigned>(Flags)
2482 .Case("nzcvq", 0x8) // same as CPSR_f
2483 .Case("g", 0x4) // same as CPSR_s
2484 .Case("nzcvqg", 0xc) // same as CPSR_fs
2487 if (FlagsVal == ~0U) {
2489 return MatchOperand_NoMatch;
2491 FlagsVal = 8; // No flag
2493 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
2494 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
2496 for (int i = 0, e = Flags.size(); i != e; ++i) {
2497 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
2504 // If some specific flag is already set, it means that some letter is
2505 // present more than once, this is not acceptable.
2506 if (FlagsVal == ~0U || (FlagsVal & Flag))
2507 return MatchOperand_NoMatch;
2510 } else // No match for special register.
2511 return MatchOperand_NoMatch;
2513 // Special register without flags are equivalent to "fc" flags.
2517 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2518 if (SpecReg == "spsr")
2521 Parser.Lex(); // Eat identifier token.
2522 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2523 return MatchOperand_Success;
2526 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2527 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
2528 int Low, int High) {
2529 const AsmToken &Tok = Parser.getTok();
2530 if (Tok.isNot(AsmToken::Identifier)) {
2531 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2532 return MatchOperand_ParseFail;
2534 StringRef ShiftName = Tok.getString();
2535 std::string LowerOp = LowercaseString(Op);
2536 std::string UpperOp = UppercaseString(Op);
2537 if (ShiftName != LowerOp && ShiftName != UpperOp) {
2538 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2539 return MatchOperand_ParseFail;
2541 Parser.Lex(); // Eat shift type token.
2543 // There must be a '#' and a shift amount.
2544 if (Parser.getTok().isNot(AsmToken::Hash)) {
2545 Error(Parser.getTok().getLoc(), "'#' expected");
2546 return MatchOperand_ParseFail;
2548 Parser.Lex(); // Eat hash token.
2550 const MCExpr *ShiftAmount;
2551 SMLoc Loc = Parser.getTok().getLoc();
2552 if (getParser().ParseExpression(ShiftAmount)) {
2553 Error(Loc, "illegal expression");
2554 return MatchOperand_ParseFail;
2556 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2558 Error(Loc, "constant expression expected");
2559 return MatchOperand_ParseFail;
2561 int Val = CE->getValue();
2562 if (Val < Low || Val > High) {
2563 Error(Loc, "immediate value out of range");
2564 return MatchOperand_ParseFail;
2567 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
2569 return MatchOperand_Success;
2572 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2573 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2574 const AsmToken &Tok = Parser.getTok();
2575 SMLoc S = Tok.getLoc();
2576 if (Tok.isNot(AsmToken::Identifier)) {
2577 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2578 return MatchOperand_ParseFail;
2580 int Val = StringSwitch<int>(Tok.getString())
2584 Parser.Lex(); // Eat the token.
2587 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2588 return MatchOperand_ParseFail;
2590 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
2592 S, Parser.getTok().getLoc()));
2593 return MatchOperand_Success;
2596 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
2597 /// instructions. Legal values are:
2598 /// lsl #n 'n' in [0,31]
2599 /// asr #n 'n' in [1,32]
2600 /// n == 32 encoded as n == 0.
2601 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2602 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2603 const AsmToken &Tok = Parser.getTok();
2604 SMLoc S = Tok.getLoc();
2605 if (Tok.isNot(AsmToken::Identifier)) {
2606 Error(S, "shift operator 'asr' or 'lsl' expected");
2607 return MatchOperand_ParseFail;
2609 StringRef ShiftName = Tok.getString();
2611 if (ShiftName == "lsl" || ShiftName == "LSL")
2613 else if (ShiftName == "asr" || ShiftName == "ASR")
2616 Error(S, "shift operator 'asr' or 'lsl' expected");
2617 return MatchOperand_ParseFail;
2619 Parser.Lex(); // Eat the operator.
2621 // A '#' and a shift amount.
2622 if (Parser.getTok().isNot(AsmToken::Hash)) {
2623 Error(Parser.getTok().getLoc(), "'#' expected");
2624 return MatchOperand_ParseFail;
2626 Parser.Lex(); // Eat hash token.
2628 const MCExpr *ShiftAmount;
2629 SMLoc E = Parser.getTok().getLoc();
2630 if (getParser().ParseExpression(ShiftAmount)) {
2631 Error(E, "malformed shift expression");
2632 return MatchOperand_ParseFail;
2634 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2636 Error(E, "shift amount must be an immediate");
2637 return MatchOperand_ParseFail;
2640 int64_t Val = CE->getValue();
2642 // Shift amount must be in [1,32]
2643 if (Val < 1 || Val > 32) {
2644 Error(E, "'asr' shift amount must be in range [1,32]");
2645 return MatchOperand_ParseFail;
2647 // asr #32 encoded as asr #0, but is not allowed in Thumb2 mode.
2648 if (isThumb() && Val == 32) {
2649 Error(E, "'asr #32' shift amount not allowed in Thumb mode");
2650 return MatchOperand_ParseFail;
2652 if (Val == 32) Val = 0;
2654 // Shift amount must be in [1,32]
2655 if (Val < 0 || Val > 31) {
2656 Error(E, "'lsr' shift amount must be in range [0,31]");
2657 return MatchOperand_ParseFail;
2661 E = Parser.getTok().getLoc();
2662 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2664 return MatchOperand_Success;
2667 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2668 /// of instructions. Legal values are:
2669 /// ror #n 'n' in {0, 8, 16, 24}
2670 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2671 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2672 const AsmToken &Tok = Parser.getTok();
2673 SMLoc S = Tok.getLoc();
2674 if (Tok.isNot(AsmToken::Identifier))
2675 return MatchOperand_NoMatch;
2676 StringRef ShiftName = Tok.getString();
2677 if (ShiftName != "ror" && ShiftName != "ROR")
2678 return MatchOperand_NoMatch;
2679 Parser.Lex(); // Eat the operator.
2681 // A '#' and a rotate amount.
2682 if (Parser.getTok().isNot(AsmToken::Hash)) {
2683 Error(Parser.getTok().getLoc(), "'#' expected");
2684 return MatchOperand_ParseFail;
2686 Parser.Lex(); // Eat hash token.
2688 const MCExpr *ShiftAmount;
2689 SMLoc E = Parser.getTok().getLoc();
2690 if (getParser().ParseExpression(ShiftAmount)) {
2691 Error(E, "malformed rotate expression");
2692 return MatchOperand_ParseFail;
2694 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2696 Error(E, "rotate amount must be an immediate");
2697 return MatchOperand_ParseFail;
2700 int64_t Val = CE->getValue();
2701 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2702 // normally, zero is represented in asm by omitting the rotate operand
2704 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2705 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2706 return MatchOperand_ParseFail;
2709 E = Parser.getTok().getLoc();
2710 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2712 return MatchOperand_Success;
2715 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2716 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2717 SMLoc S = Parser.getTok().getLoc();
2718 // The bitfield descriptor is really two operands, the LSB and the width.
2719 if (Parser.getTok().isNot(AsmToken::Hash)) {
2720 Error(Parser.getTok().getLoc(), "'#' expected");
2721 return MatchOperand_ParseFail;
2723 Parser.Lex(); // Eat hash token.
2725 const MCExpr *LSBExpr;
2726 SMLoc E = Parser.getTok().getLoc();
2727 if (getParser().ParseExpression(LSBExpr)) {
2728 Error(E, "malformed immediate expression");
2729 return MatchOperand_ParseFail;
2731 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2733 Error(E, "'lsb' operand must be an immediate");
2734 return MatchOperand_ParseFail;
2737 int64_t LSB = CE->getValue();
2738 // The LSB must be in the range [0,31]
2739 if (LSB < 0 || LSB > 31) {
2740 Error(E, "'lsb' operand must be in the range [0,31]");
2741 return MatchOperand_ParseFail;
2743 E = Parser.getTok().getLoc();
2745 // Expect another immediate operand.
2746 if (Parser.getTok().isNot(AsmToken::Comma)) {
2747 Error(Parser.getTok().getLoc(), "too few operands");
2748 return MatchOperand_ParseFail;
2750 Parser.Lex(); // Eat hash token.
2751 if (Parser.getTok().isNot(AsmToken::Hash)) {
2752 Error(Parser.getTok().getLoc(), "'#' expected");
2753 return MatchOperand_ParseFail;
2755 Parser.Lex(); // Eat hash token.
2757 const MCExpr *WidthExpr;
2758 if (getParser().ParseExpression(WidthExpr)) {
2759 Error(E, "malformed immediate expression");
2760 return MatchOperand_ParseFail;
2762 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2764 Error(E, "'width' operand must be an immediate");
2765 return MatchOperand_ParseFail;
2768 int64_t Width = CE->getValue();
2769 // The LSB must be in the range [1,32-lsb]
2770 if (Width < 1 || Width > 32 - LSB) {
2771 Error(E, "'width' operand must be in the range [1,32-lsb]");
2772 return MatchOperand_ParseFail;
2774 E = Parser.getTok().getLoc();
2776 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2778 return MatchOperand_Success;
2781 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2782 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2783 // Check for a post-index addressing register operand. Specifically:
2784 // postidx_reg := '+' register {, shift}
2785 // | '-' register {, shift}
2786 // | register {, shift}
2788 // This method must return MatchOperand_NoMatch without consuming any tokens
2789 // in the case where there is no match, as other alternatives take other
2791 AsmToken Tok = Parser.getTok();
2792 SMLoc S = Tok.getLoc();
2793 bool haveEaten = false;
2796 if (Tok.is(AsmToken::Plus)) {
2797 Parser.Lex(); // Eat the '+' token.
2799 } else if (Tok.is(AsmToken::Minus)) {
2800 Parser.Lex(); // Eat the '-' token.
2804 if (Parser.getTok().is(AsmToken::Identifier))
2805 Reg = tryParseRegister();
2808 return MatchOperand_NoMatch;
2809 Error(Parser.getTok().getLoc(), "register expected");
2810 return MatchOperand_ParseFail;
2812 SMLoc E = Parser.getTok().getLoc();
2814 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2815 unsigned ShiftImm = 0;
2816 if (Parser.getTok().is(AsmToken::Comma)) {
2817 Parser.Lex(); // Eat the ','.
2818 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2819 return MatchOperand_ParseFail;
2822 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2825 return MatchOperand_Success;
2828 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2829 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2830 // Check for a post-index addressing register operand. Specifically:
2831 // am3offset := '+' register
2838 // This method must return MatchOperand_NoMatch without consuming any tokens
2839 // in the case where there is no match, as other alternatives take other
2841 AsmToken Tok = Parser.getTok();
2842 SMLoc S = Tok.getLoc();
2844 // Do immediates first, as we always parse those if we have a '#'.
2845 if (Parser.getTok().is(AsmToken::Hash)) {
2846 Parser.Lex(); // Eat the '#'.
2847 // Explicitly look for a '-', as we need to encode negative zero
2849 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2850 const MCExpr *Offset;
2851 if (getParser().ParseExpression(Offset))
2852 return MatchOperand_ParseFail;
2853 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2855 Error(S, "constant expression expected");
2856 return MatchOperand_ParseFail;
2858 SMLoc E = Tok.getLoc();
2859 // Negative zero is encoded as the flag value INT32_MIN.
2860 int32_t Val = CE->getValue();
2861 if (isNegative && Val == 0)
2865 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2867 return MatchOperand_Success;
2871 bool haveEaten = false;
2874 if (Tok.is(AsmToken::Plus)) {
2875 Parser.Lex(); // Eat the '+' token.
2877 } else if (Tok.is(AsmToken::Minus)) {
2878 Parser.Lex(); // Eat the '-' token.
2882 if (Parser.getTok().is(AsmToken::Identifier))
2883 Reg = tryParseRegister();
2886 return MatchOperand_NoMatch;
2887 Error(Parser.getTok().getLoc(), "register expected");
2888 return MatchOperand_ParseFail;
2890 SMLoc E = Parser.getTok().getLoc();
2892 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2895 return MatchOperand_Success;
2898 /// cvtT2LdrdPre - Convert parsed operands to MCInst.
2899 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2900 /// when they refer multiple MIOperands inside a single one.
2902 cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
2903 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2905 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2906 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2907 // Create a writeback register dummy placeholder.
2908 Inst.addOperand(MCOperand::CreateReg(0));
2910 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
2912 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2916 /// cvtT2StrdPre - Convert parsed operands to MCInst.
2917 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2918 /// when they refer multiple MIOperands inside a single one.
2920 cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
2921 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2922 // Create a writeback register dummy placeholder.
2923 Inst.addOperand(MCOperand::CreateReg(0));
2925 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2926 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2928 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
2930 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2934 /// cvtLdWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
2935 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2936 /// when they refer multiple MIOperands inside a single one.
2938 cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
2939 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2940 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2942 // Create a writeback register dummy placeholder.
2943 Inst.addOperand(MCOperand::CreateImm(0));
2945 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
2946 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2950 /// cvtStWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
2951 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2952 /// when they refer multiple MIOperands inside a single one.
2954 cvtStWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
2955 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2956 // Create a writeback register dummy placeholder.
2957 Inst.addOperand(MCOperand::CreateImm(0));
2958 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2959 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
2960 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2964 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2965 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2966 /// when they refer multiple MIOperands inside a single one.
2968 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2969 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2970 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2972 // Create a writeback register dummy placeholder.
2973 Inst.addOperand(MCOperand::CreateImm(0));
2975 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2976 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2980 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2981 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2982 /// when they refer multiple MIOperands inside a single one.
2984 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2985 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2986 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2988 // Create a writeback register dummy placeholder.
2989 Inst.addOperand(MCOperand::CreateImm(0));
2991 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2992 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2997 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2998 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2999 /// when they refer multiple MIOperands inside a single one.
3001 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
3002 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3003 // Create a writeback register dummy placeholder.
3004 Inst.addOperand(MCOperand::CreateImm(0));
3005 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3006 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
3007 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3011 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
3012 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3013 /// when they refer multiple MIOperands inside a single one.
3015 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
3016 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3017 // Create a writeback register dummy placeholder.
3018 Inst.addOperand(MCOperand::CreateImm(0));
3019 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3020 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
3021 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3025 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
3026 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3027 /// when they refer multiple MIOperands inside a single one.
3029 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
3030 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3031 // Create a writeback register dummy placeholder.
3032 Inst.addOperand(MCOperand::CreateImm(0));
3033 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3034 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
3035 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3039 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
3040 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3041 /// when they refer multiple MIOperands inside a single one.
3043 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
3044 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3046 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3047 // Create a writeback register dummy placeholder.
3048 Inst.addOperand(MCOperand::CreateImm(0));
3050 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3052 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
3054 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3058 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
3059 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3060 /// when they refer multiple MIOperands inside a single one.
3062 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
3063 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3065 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3066 // Create a writeback register dummy placeholder.
3067 Inst.addOperand(MCOperand::CreateImm(0));
3069 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3071 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
3073 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3077 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
3078 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3079 /// when they refer multiple MIOperands inside a single one.
3081 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
3082 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3083 // Create a writeback register dummy placeholder.
3084 Inst.addOperand(MCOperand::CreateImm(0));
3086 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3088 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3090 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
3092 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3096 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
3097 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3098 /// when they refer multiple MIOperands inside a single one.
3100 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
3101 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3102 // Create a writeback register dummy placeholder.
3103 Inst.addOperand(MCOperand::CreateImm(0));
3105 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3107 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3109 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
3111 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3115 /// cvtLdrdPre - Convert parsed operands to MCInst.
3116 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3117 /// when they refer multiple MIOperands inside a single one.
3119 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
3120 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3122 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3123 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3124 // Create a writeback register dummy placeholder.
3125 Inst.addOperand(MCOperand::CreateImm(0));
3127 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3129 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3133 /// cvtStrdPre - Convert parsed operands to MCInst.
3134 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3135 /// when they refer multiple MIOperands inside a single one.
3137 cvtStrdPre(MCInst &Inst, unsigned Opcode,
3138 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3139 // Create a writeback register dummy placeholder.
3140 Inst.addOperand(MCOperand::CreateImm(0));
3142 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3143 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3145 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3147 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3151 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
3152 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3153 /// when they refer multiple MIOperands inside a single one.
3155 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
3156 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3157 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3158 // Create a writeback register dummy placeholder.
3159 Inst.addOperand(MCOperand::CreateImm(0));
3160 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
3161 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3165 /// cvtThumbMultiple- Convert parsed operands to MCInst.
3166 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3167 /// when they refer multiple MIOperands inside a single one.
3169 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
3170 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3171 // The second source operand must be the same register as the destination
3173 if (Operands.size() == 6 &&
3174 (((ARMOperand*)Operands[3])->getReg() !=
3175 ((ARMOperand*)Operands[5])->getReg()) &&
3176 (((ARMOperand*)Operands[3])->getReg() !=
3177 ((ARMOperand*)Operands[4])->getReg())) {
3178 Error(Operands[3]->getStartLoc(),
3179 "destination register must match source register");
3182 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3183 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
3184 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
3185 // If we have a three-operand form, use that, else the second source operand
3186 // is just the destination operand again.
3187 if (Operands.size() == 6)
3188 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
3190 Inst.addOperand(Inst.getOperand(0));
3191 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
3196 /// Parse an ARM memory expression, return false if successful else return true
3197 /// or an error. The first token must be a '[' when called.
3199 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3201 assert(Parser.getTok().is(AsmToken::LBrac) &&
3202 "Token is not a Left Bracket");
3203 S = Parser.getTok().getLoc();
3204 Parser.Lex(); // Eat left bracket token.
3206 const AsmToken &BaseRegTok = Parser.getTok();
3207 int BaseRegNum = tryParseRegister();
3208 if (BaseRegNum == -1)
3209 return Error(BaseRegTok.getLoc(), "register expected");
3211 // The next token must either be a comma or a closing bracket.
3212 const AsmToken &Tok = Parser.getTok();
3213 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
3214 return Error(Tok.getLoc(), "malformed memory operand");
3216 if (Tok.is(AsmToken::RBrac)) {
3218 Parser.Lex(); // Eat right bracket token.
3220 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
3221 0, 0, false, S, E));
3223 // If there's a pre-indexing writeback marker, '!', just add it as a token
3224 // operand. It's rather odd, but syntactically valid.
3225 if (Parser.getTok().is(AsmToken::Exclaim)) {
3226 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3227 Parser.Lex(); // Eat the '!'.
3233 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
3234 Parser.Lex(); // Eat the comma.
3236 // If we have a ':', it's an alignment specifier.
3237 if (Parser.getTok().is(AsmToken::Colon)) {
3238 Parser.Lex(); // Eat the ':'.
3239 E = Parser.getTok().getLoc();
3242 if (getParser().ParseExpression(Expr))
3245 // The expression has to be a constant. Memory references with relocations
3246 // don't come through here, as they use the <label> forms of the relevant
3248 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3250 return Error (E, "constant expression expected");
3253 switch (CE->getValue()) {
3255 return Error(E, "alignment specifier must be 64, 128, or 256 bits");
3256 case 64: Align = 8; break;
3257 case 128: Align = 16; break;
3258 case 256: Align = 32; break;
3261 // Now we should have the closing ']'
3262 E = Parser.getTok().getLoc();
3263 if (Parser.getTok().isNot(AsmToken::RBrac))
3264 return Error(E, "']' expected");
3265 Parser.Lex(); // Eat right bracket token.
3267 // Don't worry about range checking the value here. That's handled by
3268 // the is*() predicates.
3269 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0,
3270 ARM_AM::no_shift, 0, Align,
3273 // If there's a pre-indexing writeback marker, '!', just add it as a token
3275 if (Parser.getTok().is(AsmToken::Exclaim)) {
3276 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3277 Parser.Lex(); // Eat the '!'.
3283 // If we have a '#', it's an immediate offset, else assume it's a register
3285 if (Parser.getTok().is(AsmToken::Hash)) {
3286 Parser.Lex(); // Eat the '#'.
3287 E = Parser.getTok().getLoc();
3289 bool isNegative = getParser().getTok().is(AsmToken::Minus);
3290 const MCExpr *Offset;
3291 if (getParser().ParseExpression(Offset))
3294 // The expression has to be a constant. Memory references with relocations
3295 // don't come through here, as they use the <label> forms of the relevant
3297 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
3299 return Error (E, "constant expression expected");
3301 // If the constant was #-0, represent it as INT32_MIN.
3302 int32_t Val = CE->getValue();
3303 if (isNegative && Val == 0)
3304 CE = MCConstantExpr::Create(INT32_MIN, getContext());
3306 // Now we should have the closing ']'
3307 E = Parser.getTok().getLoc();
3308 if (Parser.getTok().isNot(AsmToken::RBrac))
3309 return Error(E, "']' expected");
3310 Parser.Lex(); // Eat right bracket token.
3312 // Don't worry about range checking the value here. That's handled by
3313 // the is*() predicates.
3314 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
3315 ARM_AM::no_shift, 0, 0,
3318 // If there's a pre-indexing writeback marker, '!', just add it as a token
3320 if (Parser.getTok().is(AsmToken::Exclaim)) {
3321 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3322 Parser.Lex(); // Eat the '!'.
3328 // The register offset is optionally preceded by a '+' or '-'
3329 bool isNegative = false;
3330 if (Parser.getTok().is(AsmToken::Minus)) {
3332 Parser.Lex(); // Eat the '-'.
3333 } else if (Parser.getTok().is(AsmToken::Plus)) {
3335 Parser.Lex(); // Eat the '+'.
3338 E = Parser.getTok().getLoc();
3339 int OffsetRegNum = tryParseRegister();
3340 if (OffsetRegNum == -1)
3341 return Error(E, "register expected");
3343 // If there's a shift operator, handle it.
3344 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
3345 unsigned ShiftImm = 0;
3346 if (Parser.getTok().is(AsmToken::Comma)) {
3347 Parser.Lex(); // Eat the ','.
3348 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
3352 // Now we should have the closing ']'
3353 E = Parser.getTok().getLoc();
3354 if (Parser.getTok().isNot(AsmToken::RBrac))
3355 return Error(E, "']' expected");
3356 Parser.Lex(); // Eat right bracket token.
3358 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
3359 ShiftType, ShiftImm, 0, isNegative,
3362 // If there's a pre-indexing writeback marker, '!', just add it as a token
3364 if (Parser.getTok().is(AsmToken::Exclaim)) {
3365 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3366 Parser.Lex(); // Eat the '!'.
3372 /// parseMemRegOffsetShift - one of these two:
3373 /// ( lsl | lsr | asr | ror ) , # shift_amount
3375 /// return true if it parses a shift otherwise it returns false.
3376 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
3378 SMLoc Loc = Parser.getTok().getLoc();
3379 const AsmToken &Tok = Parser.getTok();
3380 if (Tok.isNot(AsmToken::Identifier))
3382 StringRef ShiftName = Tok.getString();
3383 if (ShiftName == "lsl" || ShiftName == "LSL")
3385 else if (ShiftName == "lsr" || ShiftName == "LSR")
3387 else if (ShiftName == "asr" || ShiftName == "ASR")
3389 else if (ShiftName == "ror" || ShiftName == "ROR")
3391 else if (ShiftName == "rrx" || ShiftName == "RRX")
3394 return Error(Loc, "illegal shift operator");
3395 Parser.Lex(); // Eat shift type token.
3397 // rrx stands alone.
3399 if (St != ARM_AM::rrx) {
3400 Loc = Parser.getTok().getLoc();
3401 // A '#' and a shift amount.
3402 const AsmToken &HashTok = Parser.getTok();
3403 if (HashTok.isNot(AsmToken::Hash))
3404 return Error(HashTok.getLoc(), "'#' expected");
3405 Parser.Lex(); // Eat hash token.
3408 if (getParser().ParseExpression(Expr))
3410 // Range check the immediate.
3411 // lsl, ror: 0 <= imm <= 31
3412 // lsr, asr: 0 <= imm <= 32
3413 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3415 return Error(Loc, "shift amount must be an immediate");
3416 int64_t Imm = CE->getValue();
3418 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
3419 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
3420 return Error(Loc, "immediate shift value out of range");
3427 /// parseFPImm - A floating point immediate expression operand.
3428 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
3429 parseFPImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3430 SMLoc S = Parser.getTok().getLoc();
3432 if (Parser.getTok().isNot(AsmToken::Hash))
3433 return MatchOperand_NoMatch;
3435 // Disambiguate the VMOV forms that can accept an FP immediate.
3436 // vmov.f32 <sreg>, #imm
3437 // vmov.f64 <dreg>, #imm
3438 // vmov.f32 <dreg>, #imm @ vector f32x2
3439 // vmov.f32 <qreg>, #imm @ vector f32x4
3441 // There are also the NEON VMOV instructions which expect an
3442 // integer constant. Make sure we don't try to parse an FPImm
3444 // vmov.i{8|16|32|64} <dreg|qreg>, #imm
3445 ARMOperand *TyOp = static_cast<ARMOperand*>(Operands[2]);
3446 if (!TyOp->isToken() || (TyOp->getToken() != ".f32" &&
3447 TyOp->getToken() != ".f64"))
3448 return MatchOperand_NoMatch;
3450 Parser.Lex(); // Eat the '#'.
3452 // Handle negation, as that still comes through as a separate token.
3453 bool isNegative = false;
3454 if (Parser.getTok().is(AsmToken::Minus)) {
3458 const AsmToken &Tok = Parser.getTok();
3459 if (Tok.is(AsmToken::Real)) {
3460 APFloat RealVal(APFloat::IEEEdouble, Tok.getString());
3461 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
3462 // If we had a '-' in front, toggle the sign bit.
3463 IntVal ^= (uint64_t)isNegative << 63;
3464 int Val = ARM_AM::getFP64Imm(APInt(64, IntVal));
3465 Parser.Lex(); // Eat the token.
3467 TokError("floating point value out of range");
3468 return MatchOperand_ParseFail;
3470 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3471 return MatchOperand_Success;
3473 if (Tok.is(AsmToken::Integer)) {
3474 int64_t Val = Tok.getIntVal();
3475 Parser.Lex(); // Eat the token.
3476 if (Val > 255 || Val < 0) {
3477 TokError("encoded floating point value out of range");
3478 return MatchOperand_ParseFail;
3480 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3481 return MatchOperand_Success;
3484 TokError("invalid floating point immediate");
3485 return MatchOperand_ParseFail;
3487 /// Parse a arm instruction operand. For now this parses the operand regardless
3488 /// of the mnemonic.
3489 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3490 StringRef Mnemonic) {
3493 // Check if the current operand has a custom associated parser, if so, try to
3494 // custom parse the operand, or fallback to the general approach.
3495 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
3496 if (ResTy == MatchOperand_Success)
3498 // If there wasn't a custom match, try the generic matcher below. Otherwise,
3499 // there was a match, but an error occurred, in which case, just return that
3500 // the operand parsing failed.
3501 if (ResTy == MatchOperand_ParseFail)
3504 switch (getLexer().getKind()) {
3506 Error(Parser.getTok().getLoc(), "unexpected token in operand");
3508 case AsmToken::Identifier: {
3509 // If this is VMRS, check for the apsr_nzcv operand.
3510 if (!tryParseRegisterWithWriteBack(Operands))
3512 int Res = tryParseShiftRegister(Operands);
3513 if (Res == 0) // success
3515 else if (Res == -1) // irrecoverable error
3517 if (Mnemonic == "vmrs" && Parser.getTok().getString() == "apsr_nzcv") {
3518 S = Parser.getTok().getLoc();
3520 Operands.push_back(ARMOperand::CreateToken("apsr_nzcv", S));
3524 // Fall though for the Identifier case that is not a register or a
3527 case AsmToken::Integer: // things like 1f and 2b as a branch targets
3528 case AsmToken::Dot: { // . as a branch target
3529 // This was not a register so parse other operands that start with an
3530 // identifier (like labels) as expressions and create them as immediates.
3531 const MCExpr *IdVal;
3532 S = Parser.getTok().getLoc();
3533 if (getParser().ParseExpression(IdVal))
3535 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3536 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
3539 case AsmToken::LBrac:
3540 return parseMemory(Operands);
3541 case AsmToken::LCurly:
3542 return parseRegisterList(Operands);
3543 case AsmToken::Hash: {
3544 // #42 -> immediate.
3545 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
3546 S = Parser.getTok().getLoc();
3548 bool isNegative = Parser.getTok().is(AsmToken::Minus);
3549 const MCExpr *ImmVal;
3550 if (getParser().ParseExpression(ImmVal))
3552 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ImmVal);
3554 Error(S, "constant expression expected");
3555 return MatchOperand_ParseFail;
3557 int32_t Val = CE->getValue();
3558 if (isNegative && Val == 0)
3559 ImmVal = MCConstantExpr::Create(INT32_MIN, getContext());
3560 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3561 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
3564 case AsmToken::Colon: {
3565 // ":lower16:" and ":upper16:" expression prefixes
3566 // FIXME: Check it's an expression prefix,
3567 // e.g. (FOO - :lower16:BAR) isn't legal.
3568 ARMMCExpr::VariantKind RefKind;
3569 if (parsePrefix(RefKind))
3572 const MCExpr *SubExprVal;
3573 if (getParser().ParseExpression(SubExprVal))
3576 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
3578 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3579 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
3585 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
3586 // :lower16: and :upper16:.
3587 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
3588 RefKind = ARMMCExpr::VK_ARM_None;
3590 // :lower16: and :upper16: modifiers
3591 assert(getLexer().is(AsmToken::Colon) && "expected a :");
3592 Parser.Lex(); // Eat ':'
3594 if (getLexer().isNot(AsmToken::Identifier)) {
3595 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
3599 StringRef IDVal = Parser.getTok().getIdentifier();
3600 if (IDVal == "lower16") {
3601 RefKind = ARMMCExpr::VK_ARM_LO16;
3602 } else if (IDVal == "upper16") {
3603 RefKind = ARMMCExpr::VK_ARM_HI16;
3605 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
3610 if (getLexer().isNot(AsmToken::Colon)) {
3611 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
3614 Parser.Lex(); // Eat the last ':'
3618 /// \brief Given a mnemonic, split out possible predication code and carry
3619 /// setting letters to form a canonical mnemonic and flags.
3621 // FIXME: Would be nice to autogen this.
3622 // FIXME: This is a bit of a maze of special cases.
3623 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
3624 unsigned &PredicationCode,
3626 unsigned &ProcessorIMod,
3627 StringRef &ITMask) {
3628 PredicationCode = ARMCC::AL;
3629 CarrySetting = false;
3632 // Ignore some mnemonics we know aren't predicated forms.
3634 // FIXME: Would be nice to autogen this.
3635 if ((Mnemonic == "movs" && isThumb()) ||
3636 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
3637 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
3638 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
3639 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
3640 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
3641 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
3642 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
3645 // First, split out any predication code. Ignore mnemonics we know aren't
3646 // predicated but do have a carry-set and so weren't caught above.
3647 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
3648 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
3649 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
3650 Mnemonic != "sbcs" && Mnemonic != "rscs") {
3651 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
3652 .Case("eq", ARMCC::EQ)
3653 .Case("ne", ARMCC::NE)
3654 .Case("hs", ARMCC::HS)
3655 .Case("cs", ARMCC::HS)
3656 .Case("lo", ARMCC::LO)
3657 .Case("cc", ARMCC::LO)
3658 .Case("mi", ARMCC::MI)
3659 .Case("pl", ARMCC::PL)
3660 .Case("vs", ARMCC::VS)
3661 .Case("vc", ARMCC::VC)
3662 .Case("hi", ARMCC::HI)
3663 .Case("ls", ARMCC::LS)
3664 .Case("ge", ARMCC::GE)
3665 .Case("lt", ARMCC::LT)
3666 .Case("gt", ARMCC::GT)
3667 .Case("le", ARMCC::LE)
3668 .Case("al", ARMCC::AL)
3671 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
3672 PredicationCode = CC;
3676 // Next, determine if we have a carry setting bit. We explicitly ignore all
3677 // the instructions we know end in 's'.
3678 if (Mnemonic.endswith("s") &&
3679 !(Mnemonic == "cps" || Mnemonic == "mls" ||
3680 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
3681 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
3682 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
3683 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
3684 (Mnemonic == "movs" && isThumb()))) {
3685 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
3686 CarrySetting = true;
3689 // The "cps" instruction can have a interrupt mode operand which is glued into
3690 // the mnemonic. Check if this is the case, split it and parse the imod op
3691 if (Mnemonic.startswith("cps")) {
3692 // Split out any imod code.
3694 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
3695 .Case("ie", ARM_PROC::IE)
3696 .Case("id", ARM_PROC::ID)
3699 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
3700 ProcessorIMod = IMod;
3704 // The "it" instruction has the condition mask on the end of the mnemonic.
3705 if (Mnemonic.startswith("it")) {
3706 ITMask = Mnemonic.slice(2, Mnemonic.size());
3707 Mnemonic = Mnemonic.slice(0, 2);
3713 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
3714 /// inclusion of carry set or predication code operands.
3716 // FIXME: It would be nice to autogen this.
3718 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
3719 bool &CanAcceptPredicationCode) {
3720 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
3721 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
3722 Mnemonic == "add" || Mnemonic == "adc" ||
3723 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
3724 Mnemonic == "orr" || Mnemonic == "mvn" ||
3725 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
3726 Mnemonic == "sbc" || Mnemonic == "eor" || Mnemonic == "neg" ||
3727 (!isThumb() && (Mnemonic == "smull" || Mnemonic == "mov" ||
3728 Mnemonic == "mla" || Mnemonic == "smlal" ||
3729 Mnemonic == "umlal" || Mnemonic == "umull"))) {
3730 CanAcceptCarrySet = true;
3732 CanAcceptCarrySet = false;
3734 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
3735 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
3736 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
3737 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
3738 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "setend" ||
3739 (Mnemonic == "clrex" && !isThumb()) ||
3740 (Mnemonic == "nop" && isThumbOne()) ||
3741 ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw" ||
3742 Mnemonic == "ldc2" || Mnemonic == "ldc2l" ||
3743 Mnemonic == "stc2" || Mnemonic == "stc2l") && !isThumb()) ||
3744 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs")) &&
3746 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumbOne())) {
3747 CanAcceptPredicationCode = false;
3749 CanAcceptPredicationCode = true;
3752 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
3753 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
3754 CanAcceptPredicationCode = false;
3758 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
3759 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3760 // FIXME: This is all horribly hacky. We really need a better way to deal
3761 // with optional operands like this in the matcher table.
3763 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
3764 // another does not. Specifically, the MOVW instruction does not. So we
3765 // special case it here and remove the defaulted (non-setting) cc_out
3766 // operand if that's the instruction we're trying to match.
3768 // We do this as post-processing of the explicit operands rather than just
3769 // conditionally adding the cc_out in the first place because we need
3770 // to check the type of the parsed immediate operand.
3771 if (Mnemonic == "mov" && Operands.size() > 4 && !isThumb() &&
3772 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
3773 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
3774 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3777 // Register-register 'add' for thumb does not have a cc_out operand
3778 // when there are only two register operands.
3779 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
3780 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3781 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3782 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3784 // Register-register 'add' for thumb does not have a cc_out operand
3785 // when it's an ADD Rdm, SP, {Rdm|#imm0_255} instruction. We do
3786 // have to check the immediate range here since Thumb2 has a variant
3787 // that can handle a different range and has a cc_out operand.
3788 if (((isThumb() && Mnemonic == "add") ||
3789 (isThumbTwo() && Mnemonic == "sub")) &&
3790 Operands.size() == 6 &&
3791 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3792 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3793 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
3794 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
3795 (static_cast<ARMOperand*>(Operands[5])->isReg() ||
3796 static_cast<ARMOperand*>(Operands[5])->isImm0_1020s4()))
3798 // For Thumb2, add/sub immediate does not have a cc_out operand for the
3799 // imm0_4095 variant. That's the least-preferred variant when
3800 // selecting via the generic "add" mnemonic, so to know that we
3801 // should remove the cc_out operand, we have to explicitly check that
3802 // it's not one of the other variants. Ugh.
3803 if (isThumbTwo() && (Mnemonic == "add" || Mnemonic == "sub") &&
3804 Operands.size() == 6 &&
3805 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3806 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3807 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3808 // Nest conditions rather than one big 'if' statement for readability.
3810 // If either register is a high reg, it's either one of the SP
3811 // variants (handled above) or a 32-bit encoding, so we just
3812 // check against T3.
3813 if ((!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
3814 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg())) &&
3815 static_cast<ARMOperand*>(Operands[5])->isT2SOImm())
3817 // If both registers are low, we're in an IT block, and the immediate is
3818 // in range, we should use encoding T1 instead, which has a cc_out.
3820 isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) &&
3821 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
3822 static_cast<ARMOperand*>(Operands[5])->isImm0_7())
3825 // Otherwise, we use encoding T4, which does not have a cc_out
3830 // The thumb2 multiply instruction doesn't have a CCOut register, so
3831 // if we have a "mul" mnemonic in Thumb mode, check if we'll be able to
3832 // use the 16-bit encoding or not.
3833 if (isThumbTwo() && Mnemonic == "mul" && Operands.size() == 6 &&
3834 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
3835 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3836 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3837 static_cast<ARMOperand*>(Operands[5])->isReg() &&
3838 // If the registers aren't low regs, the destination reg isn't the
3839 // same as one of the source regs, or the cc_out operand is zero
3840 // outside of an IT block, we have to use the 32-bit encoding, so
3841 // remove the cc_out operand.
3842 (!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
3843 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) ||
3845 (static_cast<ARMOperand*>(Operands[3])->getReg() !=
3846 static_cast<ARMOperand*>(Operands[5])->getReg() &&
3847 static_cast<ARMOperand*>(Operands[3])->getReg() !=
3848 static_cast<ARMOperand*>(Operands[4])->getReg())))
3853 // Register-register 'add/sub' for thumb does not have a cc_out operand
3854 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
3855 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
3856 // right, this will result in better diagnostics (which operand is off)
3858 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
3859 (Operands.size() == 5 || Operands.size() == 6) &&
3860 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3861 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
3862 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3868 /// Parse an arm instruction mnemonic followed by its operands.
3869 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
3870 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3871 // Create the leading tokens for the mnemonic, split by '.' characters.
3872 size_t Start = 0, Next = Name.find('.');
3873 StringRef Mnemonic = Name.slice(Start, Next);
3875 // Split out the predication code and carry setting flag from the mnemonic.
3876 unsigned PredicationCode;
3877 unsigned ProcessorIMod;
3880 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
3881 ProcessorIMod, ITMask);
3883 // In Thumb1, only the branch (B) instruction can be predicated.
3884 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
3885 Parser.EatToEndOfStatement();
3886 return Error(NameLoc, "conditional execution not supported in Thumb1");
3889 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
3891 // Handle the IT instruction ITMask. Convert it to a bitmask. This
3892 // is the mask as it will be for the IT encoding if the conditional
3893 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
3894 // where the conditional bit0 is zero, the instruction post-processing
3895 // will adjust the mask accordingly.
3896 if (Mnemonic == "it") {
3897 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + 2);
3898 if (ITMask.size() > 3) {
3899 Parser.EatToEndOfStatement();
3900 return Error(Loc, "too many conditions on IT instruction");
3903 for (unsigned i = ITMask.size(); i != 0; --i) {
3904 char pos = ITMask[i - 1];
3905 if (pos != 't' && pos != 'e') {
3906 Parser.EatToEndOfStatement();
3907 return Error(Loc, "illegal IT block condition mask '" + ITMask + "'");
3910 if (ITMask[i - 1] == 't')
3913 Operands.push_back(ARMOperand::CreateITMask(Mask, Loc));
3916 // FIXME: This is all a pretty gross hack. We should automatically handle
3917 // optional operands like this via tblgen.
3919 // Next, add the CCOut and ConditionCode operands, if needed.
3921 // For mnemonics which can ever incorporate a carry setting bit or predication
3922 // code, our matching model involves us always generating CCOut and
3923 // ConditionCode operands to match the mnemonic "as written" and then we let
3924 // the matcher deal with finding the right instruction or generating an
3925 // appropriate error.
3926 bool CanAcceptCarrySet, CanAcceptPredicationCode;
3927 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
3929 // If we had a carry-set on an instruction that can't do that, issue an
3931 if (!CanAcceptCarrySet && CarrySetting) {
3932 Parser.EatToEndOfStatement();
3933 return Error(NameLoc, "instruction '" + Mnemonic +
3934 "' can not set flags, but 's' suffix specified");
3936 // If we had a predication code on an instruction that can't do that, issue an
3938 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
3939 Parser.EatToEndOfStatement();
3940 return Error(NameLoc, "instruction '" + Mnemonic +
3941 "' is not predicable, but condition code specified");
3944 // Add the carry setting operand, if necessary.
3945 if (CanAcceptCarrySet) {
3946 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size());
3947 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
3951 // Add the predication code operand, if necessary.
3952 if (CanAcceptPredicationCode) {
3953 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size() +
3955 Operands.push_back(ARMOperand::CreateCondCode(
3956 ARMCC::CondCodes(PredicationCode), Loc));
3959 // Add the processor imod operand, if necessary.
3960 if (ProcessorIMod) {
3961 Operands.push_back(ARMOperand::CreateImm(
3962 MCConstantExpr::Create(ProcessorIMod, getContext()),
3966 // Add the remaining tokens in the mnemonic.
3967 while (Next != StringRef::npos) {
3969 Next = Name.find('.', Start + 1);
3970 StringRef ExtraToken = Name.slice(Start, Next);
3972 // For now, we're only parsing Thumb1 (for the most part), so
3973 // just ignore ".n" qualifiers. We'll use them to restrict
3974 // matching when we do Thumb2.
3975 if (ExtraToken != ".n") {
3976 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Start);
3977 Operands.push_back(ARMOperand::CreateToken(ExtraToken, Loc));
3981 // Read the remaining operands.
3982 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3983 // Read the first operand.
3984 if (parseOperand(Operands, Mnemonic)) {
3985 Parser.EatToEndOfStatement();
3989 while (getLexer().is(AsmToken::Comma)) {
3990 Parser.Lex(); // Eat the comma.
3992 // Parse and remember the operand.
3993 if (parseOperand(Operands, Mnemonic)) {
3994 Parser.EatToEndOfStatement();
4000 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4001 SMLoc Loc = getLexer().getLoc();
4002 Parser.EatToEndOfStatement();
4003 return Error(Loc, "unexpected token in argument list");
4006 Parser.Lex(); // Consume the EndOfStatement
4008 // Some instructions, mostly Thumb, have forms for the same mnemonic that
4009 // do and don't have a cc_out optional-def operand. With some spot-checks
4010 // of the operand list, we can figure out which variant we're trying to
4011 // parse and adjust accordingly before actually matching. We shouldn't ever
4012 // try to remove a cc_out operand that was explicitly set on the the
4013 // mnemonic, of course (CarrySetting == true). Reason number #317 the
4014 // table driven matcher doesn't fit well with the ARM instruction set.
4015 if (!CarrySetting && shouldOmitCCOutOperand(Mnemonic, Operands)) {
4016 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
4017 Operands.erase(Operands.begin() + 1);
4021 // ARM mode 'blx' need special handling, as the register operand version
4022 // is predicable, but the label operand version is not. So, we can't rely
4023 // on the Mnemonic based checking to correctly figure out when to put
4024 // a k_CondCode operand in the list. If we're trying to match the label
4025 // version, remove the k_CondCode operand here.
4026 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
4027 static_cast<ARMOperand*>(Operands[2])->isImm()) {
4028 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
4029 Operands.erase(Operands.begin() + 1);
4033 // The vector-compare-to-zero instructions have a literal token "#0" at
4034 // the end that comes to here as an immediate operand. Convert it to a
4035 // token to play nicely with the matcher.
4036 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
4037 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
4038 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4039 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
4040 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4041 if (CE && CE->getValue() == 0) {
4042 Operands.erase(Operands.begin() + 5);
4043 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4047 // VCMP{E} does the same thing, but with a different operand count.
4048 if ((Mnemonic == "vcmp" || Mnemonic == "vcmpe") && Operands.size() == 5 &&
4049 static_cast<ARMOperand*>(Operands[4])->isImm()) {
4050 ARMOperand *Op = static_cast<ARMOperand*>(Operands[4]);
4051 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4052 if (CE && CE->getValue() == 0) {
4053 Operands.erase(Operands.begin() + 4);
4054 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4058 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
4059 // end. Convert it to a token here.
4060 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
4061 static_cast<ARMOperand*>(Operands[5])->isImm()) {
4062 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
4063 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
4064 if (CE && CE->getValue() == 0) {
4065 Operands.erase(Operands.begin() + 5);
4066 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
4074 // Validate context-sensitive operand constraints.
4076 // return 'true' if register list contains non-low GPR registers,
4077 // 'false' otherwise. If Reg is in the register list or is HiReg, set
4078 // 'containsReg' to true.
4079 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
4080 unsigned HiReg, bool &containsReg) {
4081 containsReg = false;
4082 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4083 unsigned OpReg = Inst.getOperand(i).getReg();
4086 // Anything other than a low register isn't legal here.
4087 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
4093 // Check if the specified regisgter is in the register list of the inst,
4094 // starting at the indicated operand number.
4095 static bool listContainsReg(MCInst &Inst, unsigned OpNo, unsigned Reg) {
4096 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4097 unsigned OpReg = Inst.getOperand(i).getReg();
4104 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
4105 // the ARMInsts array) instead. Getting that here requires awkward
4106 // API changes, though. Better way?
4108 extern MCInstrDesc ARMInsts[];
4110 static MCInstrDesc &getInstDesc(unsigned Opcode) {
4111 return ARMInsts[Opcode];
4114 // FIXME: We would really like to be able to tablegen'erate this.
4116 validateInstruction(MCInst &Inst,
4117 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4118 MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
4119 SMLoc Loc = Operands[0]->getStartLoc();
4120 // Check the IT block state first.
4121 // NOTE: In Thumb mode, the BKPT instruction has the interesting property of
4122 // being allowed in IT blocks, but not being predicable. It just always
4124 if (inITBlock() && Inst.getOpcode() != ARM::tBKPT) {
4126 if (ITState.FirstCond)
4127 ITState.FirstCond = false;
4129 bit = (ITState.Mask >> (5 - ITState.CurPosition)) & 1;
4130 // The instruction must be predicable.
4131 if (!MCID.isPredicable())
4132 return Error(Loc, "instructions in IT block must be predicable");
4133 unsigned Cond = Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm();
4134 unsigned ITCond = bit ? ITState.Cond :
4135 ARMCC::getOppositeCondition(ITState.Cond);
4136 if (Cond != ITCond) {
4137 // Find the condition code Operand to get its SMLoc information.
4139 for (unsigned i = 1; i < Operands.size(); ++i)
4140 if (static_cast<ARMOperand*>(Operands[i])->isCondCode())
4141 CondLoc = Operands[i]->getStartLoc();
4142 return Error(CondLoc, "incorrect condition in IT block; got '" +
4143 StringRef(ARMCondCodeToString(ARMCC::CondCodes(Cond))) +
4144 "', but expected '" +
4145 ARMCondCodeToString(ARMCC::CondCodes(ITCond)) + "'");
4147 // Check for non-'al' condition codes outside of the IT block.
4148 } else if (isThumbTwo() && MCID.isPredicable() &&
4149 Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm() !=
4150 ARMCC::AL && Inst.getOpcode() != ARM::tB &&
4151 Inst.getOpcode() != ARM::t2B)
4152 return Error(Loc, "predicated instructions must be in IT block");
4154 switch (Inst.getOpcode()) {
4157 case ARM::LDRD_POST:
4159 // Rt2 must be Rt + 1.
4160 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4161 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4163 return Error(Operands[3]->getStartLoc(),
4164 "destination operands must be sequential");
4168 // Rt2 must be Rt + 1.
4169 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4170 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4172 return Error(Operands[3]->getStartLoc(),
4173 "source operands must be sequential");
4177 case ARM::STRD_POST:
4179 // Rt2 must be Rt + 1.
4180 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4181 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
4183 return Error(Operands[3]->getStartLoc(),
4184 "source operands must be sequential");
4189 // width must be in range [1, 32-lsb]
4190 unsigned lsb = Inst.getOperand(2).getImm();
4191 unsigned widthm1 = Inst.getOperand(3).getImm();
4192 if (widthm1 >= 32 - lsb)
4193 return Error(Operands[5]->getStartLoc(),
4194 "bitfield width must be in range [1,32-lsb]");
4198 // If we're parsing Thumb2, the .w variant is available and handles
4199 // most cases that are normally illegal for a Thumb1 LDM
4200 // instruction. We'll make the transformation in processInstruction()
4203 // Thumb LDM instructions are writeback iff the base register is not
4204 // in the register list.
4205 unsigned Rn = Inst.getOperand(0).getReg();
4206 bool hasWritebackToken =
4207 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4208 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4209 bool listContainsBase;
4210 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) && !isThumbTwo())
4211 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
4212 "registers must be in range r0-r7");
4213 // If we should have writeback, then there should be a '!' token.
4214 if (!listContainsBase && !hasWritebackToken && !isThumbTwo())
4215 return Error(Operands[2]->getStartLoc(),
4216 "writeback operator '!' expected");
4217 // If we should not have writeback, there must not be a '!'. This is
4218 // true even for the 32-bit wide encodings.
4219 if (listContainsBase && hasWritebackToken)
4220 return Error(Operands[3]->getStartLoc(),
4221 "writeback operator '!' not allowed when base register "
4222 "in register list");
4226 case ARM::t2LDMIA_UPD: {
4227 if (listContainsReg(Inst, 3, Inst.getOperand(0).getReg()))
4228 return Error(Operands[4]->getStartLoc(),
4229 "writeback operator '!' not allowed when base register "
4230 "in register list");
4234 bool listContainsBase;
4235 if (checkLowRegisterList(Inst, 3, 0, ARM::PC, listContainsBase))
4236 return Error(Operands[2]->getStartLoc(),
4237 "registers must be in range r0-r7 or pc");
4241 bool listContainsBase;
4242 if (checkLowRegisterList(Inst, 3, 0, ARM::LR, listContainsBase))
4243 return Error(Operands[2]->getStartLoc(),
4244 "registers must be in range r0-r7 or lr");
4247 case ARM::tSTMIA_UPD: {
4248 bool listContainsBase;
4249 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase) && !isThumbTwo())
4250 return Error(Operands[4]->getStartLoc(),
4251 "registers must be in range r0-r7");
4260 processInstruction(MCInst &Inst,
4261 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4262 switch (Inst.getOpcode()) {
4263 case ARM::LDMIA_UPD:
4264 // If this is a load of a single register via a 'pop', then we should use
4265 // a post-indexed LDR instruction instead, per the ARM ARM.
4266 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
4267 Inst.getNumOperands() == 5) {
4269 TmpInst.setOpcode(ARM::LDR_POST_IMM);
4270 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4271 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4272 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4273 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
4274 TmpInst.addOperand(MCOperand::CreateImm(4));
4275 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4276 TmpInst.addOperand(Inst.getOperand(3));
4280 case ARM::STMDB_UPD:
4281 // If this is a store of a single register via a 'push', then we should use
4282 // a pre-indexed STR instruction instead, per the ARM ARM.
4283 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
4284 Inst.getNumOperands() == 5) {
4286 TmpInst.setOpcode(ARM::STR_PRE_IMM);
4287 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4288 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4289 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
4290 TmpInst.addOperand(MCOperand::CreateImm(-4));
4291 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4292 TmpInst.addOperand(Inst.getOperand(3));
4297 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4298 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4299 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4300 // to encoding T1 if <Rd> is omitted."
4301 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6)
4302 Inst.setOpcode(ARM::tADDi3);
4305 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4306 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4307 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4308 // to encoding T1 if <Rd> is omitted."
4309 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6)
4310 Inst.setOpcode(ARM::tSUBi3);
4313 // A Thumb conditional branch outside of an IT block is a tBcc.
4314 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock())
4315 Inst.setOpcode(ARM::tBcc);
4318 // A Thumb2 conditional branch outside of an IT block is a t2Bcc.
4319 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock())
4320 Inst.setOpcode(ARM::t2Bcc);
4323 // If the conditional is AL or we're in an IT block, we really want t2B.
4324 if (Inst.getOperand(1).getImm() == ARMCC::AL || inITBlock())
4325 Inst.setOpcode(ARM::t2B);
4328 // If the conditional is AL, we really want tB.
4329 if (Inst.getOperand(1).getImm() == ARMCC::AL)
4330 Inst.setOpcode(ARM::tB);
4333 // If the register list contains any high registers, or if the writeback
4334 // doesn't match what tLDMIA can do, we need to use the 32-bit encoding
4335 // instead if we're in Thumb2. Otherwise, this should have generated
4336 // an error in validateInstruction().
4337 unsigned Rn = Inst.getOperand(0).getReg();
4338 bool hasWritebackToken =
4339 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4340 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4341 bool listContainsBase;
4342 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) ||
4343 (!listContainsBase && !hasWritebackToken) ||
4344 (listContainsBase && hasWritebackToken)) {
4345 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4346 assert (isThumbTwo());
4347 Inst.setOpcode(hasWritebackToken ? ARM::t2LDMIA_UPD : ARM::t2LDMIA);
4348 // If we're switching to the updating version, we need to insert
4349 // the writeback tied operand.
4350 if (hasWritebackToken)
4351 Inst.insert(Inst.begin(),
4352 MCOperand::CreateReg(Inst.getOperand(0).getReg()));
4356 case ARM::tSTMIA_UPD: {
4357 // If the register list contains any high registers, we need to use
4358 // the 32-bit encoding instead if we're in Thumb2. Otherwise, this
4359 // should have generated an error in validateInstruction().
4360 unsigned Rn = Inst.getOperand(0).getReg();
4361 bool listContainsBase;
4362 if (checkLowRegisterList(Inst, 4, Rn, 0, listContainsBase)) {
4363 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4364 assert (isThumbTwo());
4365 Inst.setOpcode(ARM::t2STMIA_UPD);
4370 // If we can use the 16-bit encoding and the user didn't explicitly
4371 // request the 32-bit variant, transform it here.
4372 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4373 Inst.getOperand(1).getImm() <= 255 &&
4374 ((!inITBlock() && Inst.getOperand(2).getImm() == ARMCC::AL &&
4375 Inst.getOperand(4).getReg() == ARM::CPSR) ||
4376 (inITBlock() && Inst.getOperand(4).getReg() == 0)) &&
4377 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4378 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4379 // The operands aren't in the same order for tMOVi8...
4381 TmpInst.setOpcode(ARM::tMOVi8);
4382 TmpInst.addOperand(Inst.getOperand(0));
4383 TmpInst.addOperand(Inst.getOperand(4));
4384 TmpInst.addOperand(Inst.getOperand(1));
4385 TmpInst.addOperand(Inst.getOperand(2));
4386 TmpInst.addOperand(Inst.getOperand(3));
4392 // If we can use the 16-bit encoding and the user didn't explicitly
4393 // request the 32-bit variant, transform it here.
4394 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4395 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4396 Inst.getOperand(2).getImm() == ARMCC::AL &&
4397 Inst.getOperand(4).getReg() == ARM::CPSR &&
4398 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4399 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4400 // The operands aren't the same for tMOV[S]r... (no cc_out)
4402 TmpInst.setOpcode(Inst.getOperand(4).getReg() ? ARM::tMOVSr : ARM::tMOVr);
4403 TmpInst.addOperand(Inst.getOperand(0));
4404 TmpInst.addOperand(Inst.getOperand(1));
4405 TmpInst.addOperand(Inst.getOperand(2));
4406 TmpInst.addOperand(Inst.getOperand(3));
4415 // If we can use the 16-bit encoding and the user didn't explicitly
4416 // request the 32-bit variant, transform it here.
4417 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4418 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4419 Inst.getOperand(2).getImm() == 0 &&
4420 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4421 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4423 switch (Inst.getOpcode()) {
4424 default: llvm_unreachable("Illegal opcode!");
4425 case ARM::t2SXTH: NewOpc = ARM::tSXTH; break;
4426 case ARM::t2SXTB: NewOpc = ARM::tSXTB; break;
4427 case ARM::t2UXTH: NewOpc = ARM::tUXTH; break;
4428 case ARM::t2UXTB: NewOpc = ARM::tUXTB; break;
4430 // The operands aren't the same for thumb1 (no rotate operand).
4432 TmpInst.setOpcode(NewOpc);
4433 TmpInst.addOperand(Inst.getOperand(0));
4434 TmpInst.addOperand(Inst.getOperand(1));
4435 TmpInst.addOperand(Inst.getOperand(3));
4436 TmpInst.addOperand(Inst.getOperand(4));
4442 // The mask bits for all but the first condition are represented as
4443 // the low bit of the condition code value implies 't'. We currently
4444 // always have 1 implies 't', so XOR toggle the bits if the low bit
4445 // of the condition code is zero. The encoding also expects the low
4446 // bit of the condition to be encoded as bit 4 of the mask operand,
4447 // so mask that in if needed
4448 MCOperand &MO = Inst.getOperand(1);
4449 unsigned Mask = MO.getImm();
4450 unsigned OrigMask = Mask;
4451 unsigned TZ = CountTrailingZeros_32(Mask);
4452 if ((Inst.getOperand(0).getImm() & 1) == 0) {
4453 assert(Mask && TZ <= 3 && "illegal IT mask value!");
4454 for (unsigned i = 3; i != TZ; --i)
4460 // Set up the IT block state according to the IT instruction we just
4462 assert(!inITBlock() && "nested IT blocks?!");
4463 ITState.Cond = ARMCC::CondCodes(Inst.getOperand(0).getImm());
4464 ITState.Mask = OrigMask; // Use the original mask, not the updated one.
4465 ITState.CurPosition = 0;
4466 ITState.FirstCond = true;
4472 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
4473 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
4474 // suffix depending on whether they're in an IT block or not.
4475 unsigned Opc = Inst.getOpcode();
4476 MCInstrDesc &MCID = getInstDesc(Opc);
4477 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
4478 assert(MCID.hasOptionalDef() &&
4479 "optionally flag setting instruction missing optional def operand");
4480 assert(MCID.NumOperands == Inst.getNumOperands() &&
4481 "operand count mismatch!");
4482 // Find the optional-def operand (cc_out).
4485 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
4488 // If we're parsing Thumb1, reject it completely.
4489 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
4490 return Match_MnemonicFail;
4491 // If we're parsing Thumb2, which form is legal depends on whether we're
4493 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR &&
4495 return Match_RequiresITBlock;
4496 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() == ARM::CPSR &&
4498 return Match_RequiresNotITBlock;
4500 // Some high-register supporting Thumb1 encodings only allow both registers
4501 // to be from r0-r7 when in Thumb2.
4502 else if (Opc == ARM::tADDhirr && isThumbOne() &&
4503 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4504 isARMLowRegister(Inst.getOperand(2).getReg()))
4505 return Match_RequiresThumb2;
4506 // Others only require ARMv6 or later.
4507 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
4508 isARMLowRegister(Inst.getOperand(0).getReg()) &&
4509 isARMLowRegister(Inst.getOperand(1).getReg()))
4510 return Match_RequiresV6;
4511 return Match_Success;
4515 MatchAndEmitInstruction(SMLoc IDLoc,
4516 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
4520 unsigned MatchResult;
4521 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
4522 switch (MatchResult) {
4525 // Context sensitive operand constraints aren't handled by the matcher,
4526 // so check them here.
4527 if (validateInstruction(Inst, Operands)) {
4528 // Still progress the IT block, otherwise one wrong condition causes
4529 // nasty cascading errors.
4530 forwardITPosition();
4534 // Some instructions need post-processing to, for example, tweak which
4535 // encoding is selected.
4536 processInstruction(Inst, Operands);
4538 // Only move forward at the very end so that everything in validate
4539 // and process gets a consistent answer about whether we're in an IT
4541 forwardITPosition();
4543 Out.EmitInstruction(Inst);
4545 case Match_MissingFeature:
4546 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
4548 case Match_InvalidOperand: {
4549 SMLoc ErrorLoc = IDLoc;
4550 if (ErrorInfo != ~0U) {
4551 if (ErrorInfo >= Operands.size())
4552 return Error(IDLoc, "too few operands for instruction");
4554 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
4555 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
4558 return Error(ErrorLoc, "invalid operand for instruction");
4560 case Match_MnemonicFail:
4561 return Error(IDLoc, "invalid instruction");
4562 case Match_ConversionFail:
4563 // The converter function will have already emited a diagnostic.
4565 case Match_RequiresNotITBlock:
4566 return Error(IDLoc, "flag setting instruction only valid outside IT block");
4567 case Match_RequiresITBlock:
4568 return Error(IDLoc, "instruction only valid inside IT block");
4569 case Match_RequiresV6:
4570 return Error(IDLoc, "instruction variant requires ARMv6 or later");
4571 case Match_RequiresThumb2:
4572 return Error(IDLoc, "instruction variant requires Thumb2");
4575 llvm_unreachable("Implement any new match types added!");
4579 /// parseDirective parses the arm specific directives
4580 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
4581 StringRef IDVal = DirectiveID.getIdentifier();
4582 if (IDVal == ".word")
4583 return parseDirectiveWord(4, DirectiveID.getLoc());
4584 else if (IDVal == ".thumb")
4585 return parseDirectiveThumb(DirectiveID.getLoc());
4586 else if (IDVal == ".thumb_func")
4587 return parseDirectiveThumbFunc(DirectiveID.getLoc());
4588 else if (IDVal == ".code")
4589 return parseDirectiveCode(DirectiveID.getLoc());
4590 else if (IDVal == ".syntax")
4591 return parseDirectiveSyntax(DirectiveID.getLoc());
4595 /// parseDirectiveWord
4596 /// ::= .word [ expression (, expression)* ]
4597 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
4598 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4600 const MCExpr *Value;
4601 if (getParser().ParseExpression(Value))
4604 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
4606 if (getLexer().is(AsmToken::EndOfStatement))
4609 // FIXME: Improve diagnostic.
4610 if (getLexer().isNot(AsmToken::Comma))
4611 return Error(L, "unexpected token in directive");
4620 /// parseDirectiveThumb
4622 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
4623 if (getLexer().isNot(AsmToken::EndOfStatement))
4624 return Error(L, "unexpected token in directive");
4627 // TODO: set thumb mode
4628 // TODO: tell the MC streamer the mode
4629 // getParser().getStreamer().Emit???();
4633 /// parseDirectiveThumbFunc
4634 /// ::= .thumbfunc symbol_name
4635 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
4636 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
4637 bool isMachO = MAI.hasSubsectionsViaSymbols();
4640 // Darwin asm has function name after .thumb_func direction
4643 const AsmToken &Tok = Parser.getTok();
4644 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
4645 return Error(L, "unexpected token in .thumb_func directive");
4646 Name = Tok.getString();
4647 Parser.Lex(); // Consume the identifier token.
4650 if (getLexer().isNot(AsmToken::EndOfStatement))
4651 return Error(L, "unexpected token in directive");
4654 // FIXME: assuming function name will be the line following .thumb_func
4656 Name = Parser.getTok().getString();
4659 // Mark symbol as a thumb symbol.
4660 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
4661 getParser().getStreamer().EmitThumbFunc(Func);
4665 /// parseDirectiveSyntax
4666 /// ::= .syntax unified | divided
4667 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
4668 const AsmToken &Tok = Parser.getTok();
4669 if (Tok.isNot(AsmToken::Identifier))
4670 return Error(L, "unexpected token in .syntax directive");
4671 StringRef Mode = Tok.getString();
4672 if (Mode == "unified" || Mode == "UNIFIED")
4674 else if (Mode == "divided" || Mode == "DIVIDED")
4675 return Error(L, "'.syntax divided' arm asssembly not supported");
4677 return Error(L, "unrecognized syntax mode in .syntax directive");
4679 if (getLexer().isNot(AsmToken::EndOfStatement))
4680 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
4683 // TODO tell the MC streamer the mode
4684 // getParser().getStreamer().Emit???();
4688 /// parseDirectiveCode
4689 /// ::= .code 16 | 32
4690 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
4691 const AsmToken &Tok = Parser.getTok();
4692 if (Tok.isNot(AsmToken::Integer))
4693 return Error(L, "unexpected token in .code directive");
4694 int64_t Val = Parser.getTok().getIntVal();
4700 return Error(L, "invalid operand to .code directive");
4702 if (getLexer().isNot(AsmToken::EndOfStatement))
4703 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
4709 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
4713 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
4719 extern "C" void LLVMInitializeARMAsmLexer();
4721 /// Force static initialization.
4722 extern "C" void LLVMInitializeARMAsmParser() {
4723 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
4724 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
4725 LLVMInitializeARMAsmLexer();
4728 #define GET_REGISTER_MATCHER
4729 #define GET_MATCHER_IMPLEMENTATION
4730 #include "ARMGenAsmMatcher.inc"