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 << 8) | (Value & 0xff)) == Value;
925 return Value >= 0 && Value < 256;
928 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
929 // Add as immediates when possible. Null MCExpr = 0.
931 Inst.addOperand(MCOperand::CreateImm(0));
932 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
933 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
935 Inst.addOperand(MCOperand::CreateExpr(Expr));
938 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
939 assert(N == 2 && "Invalid number of operands!");
940 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
941 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
942 Inst.addOperand(MCOperand::CreateReg(RegNum));
945 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
946 assert(N == 1 && "Invalid number of operands!");
947 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
950 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
951 assert(N == 1 && "Invalid number of operands!");
952 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
955 void addCoprocOptionOperands(MCInst &Inst, unsigned N) const {
956 assert(N == 1 && "Invalid number of operands!");
957 Inst.addOperand(MCOperand::CreateImm(CoprocOption.Val));
960 void addITMaskOperands(MCInst &Inst, unsigned N) const {
961 assert(N == 1 && "Invalid number of operands!");
962 Inst.addOperand(MCOperand::CreateImm(ITMask.Mask));
965 void addITCondCodeOperands(MCInst &Inst, unsigned N) const {
966 assert(N == 1 && "Invalid number of operands!");
967 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
970 void addCCOutOperands(MCInst &Inst, unsigned N) const {
971 assert(N == 1 && "Invalid number of operands!");
972 Inst.addOperand(MCOperand::CreateReg(getReg()));
975 void addRegOperands(MCInst &Inst, unsigned N) const {
976 assert(N == 1 && "Invalid number of operands!");
977 Inst.addOperand(MCOperand::CreateReg(getReg()));
980 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
981 assert(N == 3 && "Invalid number of operands!");
982 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
983 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
984 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
985 Inst.addOperand(MCOperand::CreateImm(
986 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
989 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
990 assert(N == 2 && "Invalid number of operands!");
991 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
992 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
993 Inst.addOperand(MCOperand::CreateImm(
994 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
997 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
998 assert(N == 1 && "Invalid number of operands!");
999 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
1003 void addRegListOperands(MCInst &Inst, unsigned N) const {
1004 assert(N == 1 && "Invalid number of operands!");
1005 const SmallVectorImpl<unsigned> &RegList = getRegList();
1006 for (SmallVectorImpl<unsigned>::const_iterator
1007 I = RegList.begin(), E = RegList.end(); I != E; ++I)
1008 Inst.addOperand(MCOperand::CreateReg(*I));
1011 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
1012 addRegListOperands(Inst, N);
1015 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
1016 addRegListOperands(Inst, N);
1019 void addRotImmOperands(MCInst &Inst, unsigned N) const {
1020 assert(N == 1 && "Invalid number of operands!");
1021 // Encoded as val>>3. The printer handles display as 8, 16, 24.
1022 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
1025 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
1026 assert(N == 1 && "Invalid number of operands!");
1027 // Munge the lsb/width into a bitfield mask.
1028 unsigned lsb = Bitfield.LSB;
1029 unsigned width = Bitfield.Width;
1030 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
1031 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
1032 (32 - (lsb + width)));
1033 Inst.addOperand(MCOperand::CreateImm(Mask));
1036 void addImmOperands(MCInst &Inst, unsigned N) const {
1037 assert(N == 1 && "Invalid number of operands!");
1038 addExpr(Inst, getImm());
1041 void addFPImmOperands(MCInst &Inst, unsigned N) const {
1042 assert(N == 1 && "Invalid number of operands!");
1043 Inst.addOperand(MCOperand::CreateImm(getFPImm()));
1046 void addImm8s4Operands(MCInst &Inst, unsigned N) const {
1047 assert(N == 1 && "Invalid number of operands!");
1048 // FIXME: We really want to scale the value here, but the LDRD/STRD
1049 // instruction don't encode operands that way yet.
1050 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1051 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
1054 void addImm0_1020s4Operands(MCInst &Inst, unsigned N) const {
1055 assert(N == 1 && "Invalid number of operands!");
1056 // The immediate is scaled by four in the encoding and is stored
1057 // in the MCInst as such. Lop off the low two bits here.
1058 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1059 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
1062 void addImm0_508s4Operands(MCInst &Inst, unsigned N) const {
1063 assert(N == 1 && "Invalid number of operands!");
1064 // The immediate is scaled by four in the encoding and is stored
1065 // in the MCInst as such. Lop off the low two bits here.
1066 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1067 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
1070 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
1071 assert(N == 1 && "Invalid number of operands!");
1072 addExpr(Inst, getImm());
1075 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
1076 assert(N == 1 && "Invalid number of operands!");
1077 addExpr(Inst, getImm());
1080 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
1081 assert(N == 1 && "Invalid number of operands!");
1082 addExpr(Inst, getImm());
1085 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
1086 assert(N == 1 && "Invalid number of operands!");
1087 addExpr(Inst, getImm());
1090 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
1091 assert(N == 1 && "Invalid number of operands!");
1092 // The constant encodes as the immediate-1, and we store in the instruction
1093 // the bits as encoded, so subtract off one here.
1094 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1095 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
1098 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
1099 assert(N == 1 && "Invalid number of operands!");
1100 // The constant encodes as the immediate-1, and we store in the instruction
1101 // the bits as encoded, so subtract off one here.
1102 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1103 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
1106 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
1107 assert(N == 1 && "Invalid number of operands!");
1108 addExpr(Inst, getImm());
1111 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
1112 assert(N == 1 && "Invalid number of operands!");
1113 addExpr(Inst, getImm());
1116 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
1117 assert(N == 1 && "Invalid number of operands!");
1118 addExpr(Inst, getImm());
1121 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
1122 assert(N == 1 && "Invalid number of operands!");
1123 // The constant encodes as the immediate, except for 32, which encodes as
1125 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1126 unsigned Imm = CE->getValue();
1127 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
1130 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
1131 assert(N == 1 && "Invalid number of operands!");
1132 addExpr(Inst, getImm());
1135 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
1136 assert(N == 1 && "Invalid number of operands!");
1137 // An ASR value of 32 encodes as 0, so that's how we want to add it to
1138 // the instruction as well.
1139 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1140 int Val = CE->getValue();
1141 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
1144 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
1145 assert(N == 1 && "Invalid number of operands!");
1146 addExpr(Inst, getImm());
1149 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
1150 assert(N == 1 && "Invalid number of operands!");
1151 addExpr(Inst, getImm());
1154 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
1155 assert(N == 1 && "Invalid number of operands!");
1156 addExpr(Inst, getImm());
1159 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
1160 assert(N == 1 && "Invalid number of operands!");
1161 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
1164 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
1165 assert(N == 1 && "Invalid number of operands!");
1166 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1169 void addAlignedMemoryOperands(MCInst &Inst, unsigned N) const {
1170 assert(N == 2 && "Invalid number of operands!");
1171 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1172 Inst.addOperand(MCOperand::CreateImm(Memory.Alignment));
1175 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
1176 assert(N == 3 && "Invalid number of operands!");
1177 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1178 if (!Memory.OffsetRegNum) {
1179 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1180 // Special case for #-0
1181 if (Val == INT32_MIN) Val = 0;
1182 if (Val < 0) Val = -Val;
1183 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1185 // For register offset, we encode the shift type and negation flag
1187 Val = ARM_AM::getAM2Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add,
1188 Memory.ShiftImm, Memory.ShiftType);
1190 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1191 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1192 Inst.addOperand(MCOperand::CreateImm(Val));
1195 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
1196 assert(N == 2 && "Invalid number of operands!");
1197 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1198 assert(CE && "non-constant AM2OffsetImm operand!");
1199 int32_t Val = CE->getValue();
1200 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1201 // Special case for #-0
1202 if (Val == INT32_MIN) Val = 0;
1203 if (Val < 0) Val = -Val;
1204 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1205 Inst.addOperand(MCOperand::CreateReg(0));
1206 Inst.addOperand(MCOperand::CreateImm(Val));
1209 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
1210 assert(N == 3 && "Invalid number of operands!");
1211 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1212 if (!Memory.OffsetRegNum) {
1213 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1214 // Special case for #-0
1215 if (Val == INT32_MIN) Val = 0;
1216 if (Val < 0) Val = -Val;
1217 Val = ARM_AM::getAM3Opc(AddSub, Val);
1219 // For register offset, we encode the shift type and negation flag
1221 Val = ARM_AM::getAM3Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
1223 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1224 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1225 Inst.addOperand(MCOperand::CreateImm(Val));
1228 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
1229 assert(N == 2 && "Invalid number of operands!");
1230 if (Kind == k_PostIndexRegister) {
1232 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
1233 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1234 Inst.addOperand(MCOperand::CreateImm(Val));
1239 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
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::getAM3Opc(AddSub, Val);
1246 Inst.addOperand(MCOperand::CreateReg(0));
1247 Inst.addOperand(MCOperand::CreateImm(Val));
1250 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
1251 assert(N == 2 && "Invalid number of operands!");
1252 // The lower two bits are always zero and as such are not encoded.
1253 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() / 4 : 0;
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::getAM5Opc(AddSub, Val);
1259 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1260 Inst.addOperand(MCOperand::CreateImm(Val));
1263 void addMemImm8s4OffsetOperands(MCInst &Inst, unsigned N) const {
1264 assert(N == 2 && "Invalid number of operands!");
1265 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1266 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1267 Inst.addOperand(MCOperand::CreateImm(Val));
1270 void addMemImm0_1020s4OffsetOperands(MCInst &Inst, unsigned N) const {
1271 assert(N == 2 && "Invalid number of operands!");
1272 // The lower two bits are always zero and as such are not encoded.
1273 int32_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() / 4 : 0;
1274 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1275 Inst.addOperand(MCOperand::CreateImm(Val));
1278 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1279 assert(N == 2 && "Invalid number of operands!");
1280 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1281 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1282 Inst.addOperand(MCOperand::CreateImm(Val));
1285 void addMemPosImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1286 addMemImm8OffsetOperands(Inst, N);
1289 void addMemNegImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1290 addMemImm8OffsetOperands(Inst, N);
1293 void addMemUImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1294 assert(N == 2 && "Invalid number of operands!");
1295 // If this is an immediate, it's a label reference.
1296 if (Kind == k_Immediate) {
1297 addExpr(Inst, getImm());
1298 Inst.addOperand(MCOperand::CreateImm(0));
1302 // Otherwise, it's a normal memory reg+offset.
1303 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1304 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1305 Inst.addOperand(MCOperand::CreateImm(Val));
1308 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1309 assert(N == 2 && "Invalid number of operands!");
1310 // If this is an immediate, it's a label reference.
1311 if (Kind == k_Immediate) {
1312 addExpr(Inst, getImm());
1313 Inst.addOperand(MCOperand::CreateImm(0));
1317 // Otherwise, it's a normal memory reg+offset.
1318 int64_t Val = Memory.OffsetImm ? Memory.OffsetImm->getValue() : 0;
1319 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1320 Inst.addOperand(MCOperand::CreateImm(Val));
1323 void addMemTBBOperands(MCInst &Inst, unsigned N) const {
1324 assert(N == 2 && "Invalid number of operands!");
1325 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1326 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1329 void addMemTBHOperands(MCInst &Inst, unsigned N) const {
1330 assert(N == 2 && "Invalid number of operands!");
1331 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1332 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1335 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1336 assert(N == 3 && "Invalid number of operands!");
1337 unsigned Val = ARM_AM::getAM2Opc(Memory.isNegative ? ARM_AM::sub : ARM_AM::add,
1338 Memory.ShiftImm, Memory.ShiftType);
1339 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1340 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1341 Inst.addOperand(MCOperand::CreateImm(Val));
1344 void addT2MemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1345 assert(N == 3 && "Invalid number of operands!");
1346 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1347 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1348 Inst.addOperand(MCOperand::CreateImm(Memory.ShiftImm));
1351 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1352 assert(N == 2 && "Invalid number of operands!");
1353 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1354 Inst.addOperand(MCOperand::CreateReg(Memory.OffsetRegNum));
1357 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1358 assert(N == 2 && "Invalid number of operands!");
1359 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 4) : 0;
1360 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1361 Inst.addOperand(MCOperand::CreateImm(Val));
1364 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1365 assert(N == 2 && "Invalid number of operands!");
1366 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 2) : 0;
1367 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1368 Inst.addOperand(MCOperand::CreateImm(Val));
1371 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1372 assert(N == 2 && "Invalid number of operands!");
1373 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue()) : 0;
1374 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1375 Inst.addOperand(MCOperand::CreateImm(Val));
1378 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1379 assert(N == 2 && "Invalid number of operands!");
1380 int64_t Val = Memory.OffsetImm ? (Memory.OffsetImm->getValue() / 4) : 0;
1381 Inst.addOperand(MCOperand::CreateReg(Memory.BaseRegNum));
1382 Inst.addOperand(MCOperand::CreateImm(Val));
1385 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1386 assert(N == 1 && "Invalid number of operands!");
1387 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1388 assert(CE && "non-constant post-idx-imm8 operand!");
1389 int Imm = CE->getValue();
1390 bool isAdd = Imm >= 0;
1391 if (Imm == INT32_MIN) Imm = 0;
1392 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1393 Inst.addOperand(MCOperand::CreateImm(Imm));
1396 void addPostIdxImm8s4Operands(MCInst &Inst, unsigned N) const {
1397 assert(N == 1 && "Invalid number of operands!");
1398 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1399 assert(CE && "non-constant post-idx-imm8s4 operand!");
1400 int Imm = CE->getValue();
1401 bool isAdd = Imm >= 0;
1402 if (Imm == INT32_MIN) Imm = 0;
1403 // Immediate is scaled by 4.
1404 Imm = ((Imm < 0 ? -Imm : Imm) / 4) | (int)isAdd << 8;
1405 Inst.addOperand(MCOperand::CreateImm(Imm));
1408 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1409 assert(N == 2 && "Invalid number of operands!");
1410 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1411 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1414 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1415 assert(N == 2 && "Invalid number of operands!");
1416 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1417 // The sign, shift type, and shift amount are encoded in a single operand
1418 // using the AM2 encoding helpers.
1419 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1420 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1421 PostIdxReg.ShiftTy);
1422 Inst.addOperand(MCOperand::CreateImm(Imm));
1425 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1426 assert(N == 1 && "Invalid number of operands!");
1427 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1430 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1431 assert(N == 1 && "Invalid number of operands!");
1432 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1435 void addVectorIndex8Operands(MCInst &Inst, unsigned N) const {
1436 assert(N == 1 && "Invalid number of operands!");
1437 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1440 void addVectorIndex16Operands(MCInst &Inst, unsigned N) const {
1441 assert(N == 1 && "Invalid number of operands!");
1442 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1445 void addVectorIndex32Operands(MCInst &Inst, unsigned N) const {
1446 assert(N == 1 && "Invalid number of operands!");
1447 Inst.addOperand(MCOperand::CreateImm(getVectorIndex()));
1450 void addNEONi8splatOperands(MCInst &Inst, unsigned N) const {
1451 assert(N == 1 && "Invalid number of operands!");
1452 // The immediate encodes the type of constant as well as the value.
1453 // Mask in that this is an i8 splat.
1454 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1455 Inst.addOperand(MCOperand::CreateImm(CE->getValue() | 0xe00));
1458 virtual void print(raw_ostream &OS) const;
1460 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1461 ARMOperand *Op = new ARMOperand(k_ITCondMask);
1462 Op->ITMask.Mask = Mask;
1468 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1469 ARMOperand *Op = new ARMOperand(k_CondCode);
1476 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1477 ARMOperand *Op = new ARMOperand(k_CoprocNum);
1478 Op->Cop.Val = CopVal;
1484 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1485 ARMOperand *Op = new ARMOperand(k_CoprocReg);
1486 Op->Cop.Val = CopVal;
1492 static ARMOperand *CreateCoprocOption(unsigned Val, SMLoc S, SMLoc E) {
1493 ARMOperand *Op = new ARMOperand(k_CoprocOption);
1500 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1501 ARMOperand *Op = new ARMOperand(k_CCOut);
1502 Op->Reg.RegNum = RegNum;
1508 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1509 ARMOperand *Op = new ARMOperand(k_Token);
1510 Op->Tok.Data = Str.data();
1511 Op->Tok.Length = Str.size();
1517 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1518 ARMOperand *Op = new ARMOperand(k_Register);
1519 Op->Reg.RegNum = RegNum;
1525 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1530 ARMOperand *Op = new ARMOperand(k_ShiftedRegister);
1531 Op->RegShiftedReg.ShiftTy = ShTy;
1532 Op->RegShiftedReg.SrcReg = SrcReg;
1533 Op->RegShiftedReg.ShiftReg = ShiftReg;
1534 Op->RegShiftedReg.ShiftImm = ShiftImm;
1540 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1544 ARMOperand *Op = new ARMOperand(k_ShiftedImmediate);
1545 Op->RegShiftedImm.ShiftTy = ShTy;
1546 Op->RegShiftedImm.SrcReg = SrcReg;
1547 Op->RegShiftedImm.ShiftImm = ShiftImm;
1553 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1555 ARMOperand *Op = new ARMOperand(k_ShifterImmediate);
1556 Op->ShifterImm.isASR = isASR;
1557 Op->ShifterImm.Imm = Imm;
1563 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1564 ARMOperand *Op = new ARMOperand(k_RotateImmediate);
1565 Op->RotImm.Imm = Imm;
1571 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1573 ARMOperand *Op = new ARMOperand(k_BitfieldDescriptor);
1574 Op->Bitfield.LSB = LSB;
1575 Op->Bitfield.Width = Width;
1582 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1583 SMLoc StartLoc, SMLoc EndLoc) {
1584 KindTy Kind = k_RegisterList;
1586 if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Regs.front().first))
1587 Kind = k_DPRRegisterList;
1588 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].
1589 contains(Regs.front().first))
1590 Kind = k_SPRRegisterList;
1592 ARMOperand *Op = new ARMOperand(Kind);
1593 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1594 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1595 Op->Registers.push_back(I->first);
1596 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1597 Op->StartLoc = StartLoc;
1598 Op->EndLoc = EndLoc;
1602 static ARMOperand *CreateVectorIndex(unsigned Idx, SMLoc S, SMLoc E,
1604 ARMOperand *Op = new ARMOperand(k_VectorIndex);
1605 Op->VectorIndex.Val = Idx;
1611 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1612 ARMOperand *Op = new ARMOperand(k_Immediate);
1619 static ARMOperand *CreateFPImm(unsigned Val, SMLoc S, MCContext &Ctx) {
1620 ARMOperand *Op = new ARMOperand(k_FPImmediate);
1621 Op->FPImm.Val = Val;
1627 static ARMOperand *CreateMem(unsigned BaseRegNum,
1628 const MCConstantExpr *OffsetImm,
1629 unsigned OffsetRegNum,
1630 ARM_AM::ShiftOpc ShiftType,
1635 ARMOperand *Op = new ARMOperand(k_Memory);
1636 Op->Memory.BaseRegNum = BaseRegNum;
1637 Op->Memory.OffsetImm = OffsetImm;
1638 Op->Memory.OffsetRegNum = OffsetRegNum;
1639 Op->Memory.ShiftType = ShiftType;
1640 Op->Memory.ShiftImm = ShiftImm;
1641 Op->Memory.Alignment = Alignment;
1642 Op->Memory.isNegative = isNegative;
1648 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1649 ARM_AM::ShiftOpc ShiftTy,
1652 ARMOperand *Op = new ARMOperand(k_PostIndexRegister);
1653 Op->PostIdxReg.RegNum = RegNum;
1654 Op->PostIdxReg.isAdd = isAdd;
1655 Op->PostIdxReg.ShiftTy = ShiftTy;
1656 Op->PostIdxReg.ShiftImm = ShiftImm;
1662 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1663 ARMOperand *Op = new ARMOperand(k_MemBarrierOpt);
1664 Op->MBOpt.Val = Opt;
1670 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1671 ARMOperand *Op = new ARMOperand(k_ProcIFlags);
1672 Op->IFlags.Val = IFlags;
1678 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1679 ARMOperand *Op = new ARMOperand(k_MSRMask);
1680 Op->MMask.Val = MMask;
1687 } // end anonymous namespace.
1689 void ARMOperand::print(raw_ostream &OS) const {
1692 OS << "<fpimm " << getFPImm() << "(" << ARM_AM::getFPImmFloat(getFPImm())
1696 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1699 OS << "<ccout " << getReg() << ">";
1701 case k_ITCondMask: {
1702 static char MaskStr[][6] = { "()", "(t)", "(e)", "(tt)", "(et)", "(te)",
1703 "(ee)", "(ttt)", "(ett)", "(tet)", "(eet)", "(tte)", "(ete)",
1705 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1706 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1710 OS << "<coprocessor number: " << getCoproc() << ">";
1713 OS << "<coprocessor register: " << getCoproc() << ">";
1715 case k_CoprocOption:
1716 OS << "<coprocessor option: " << CoprocOption.Val << ">";
1719 OS << "<mask: " << getMSRMask() << ">";
1722 getImm()->print(OS);
1724 case k_MemBarrierOpt:
1725 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1729 << " base:" << Memory.BaseRegNum;
1732 case k_PostIndexRegister:
1733 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1734 << PostIdxReg.RegNum;
1735 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1736 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1737 << PostIdxReg.ShiftImm;
1740 case k_ProcIFlags: {
1741 OS << "<ARM_PROC::";
1742 unsigned IFlags = getProcIFlags();
1743 for (int i=2; i >= 0; --i)
1744 if (IFlags & (1 << i))
1745 OS << ARM_PROC::IFlagsToString(1 << i);
1750 OS << "<register " << getReg() << ">";
1752 case k_ShifterImmediate:
1753 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1754 << " #" << ShifterImm.Imm << ">";
1756 case k_ShiftedRegister:
1757 OS << "<so_reg_reg "
1758 << RegShiftedReg.SrcReg
1759 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1760 << ", " << RegShiftedReg.ShiftReg << ", "
1761 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1764 case k_ShiftedImmediate:
1765 OS << "<so_reg_imm "
1766 << RegShiftedImm.SrcReg
1767 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1768 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1771 case k_RotateImmediate:
1772 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1774 case k_BitfieldDescriptor:
1775 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1776 << ", width: " << Bitfield.Width << ">";
1778 case k_RegisterList:
1779 case k_DPRRegisterList:
1780 case k_SPRRegisterList: {
1781 OS << "<register_list ";
1783 const SmallVectorImpl<unsigned> &RegList = getRegList();
1784 for (SmallVectorImpl<unsigned>::const_iterator
1785 I = RegList.begin(), E = RegList.end(); I != E; ) {
1787 if (++I < E) OS << ", ";
1794 OS << "'" << getToken() << "'";
1797 OS << "<vectorindex " << getVectorIndex() << ">";
1802 /// @name Auto-generated Match Functions
1805 static unsigned MatchRegisterName(StringRef Name);
1809 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1810 SMLoc &StartLoc, SMLoc &EndLoc) {
1811 RegNo = tryParseRegister();
1813 return (RegNo == (unsigned)-1);
1816 /// Try to parse a register name. The token must be an Identifier when called,
1817 /// and if it is a register name the token is eaten and the register number is
1818 /// returned. Otherwise return -1.
1820 int ARMAsmParser::tryParseRegister() {
1821 const AsmToken &Tok = Parser.getTok();
1822 if (Tok.isNot(AsmToken::Identifier)) return -1;
1824 // FIXME: Validate register for the current architecture; we have to do
1825 // validation later, so maybe there is no need for this here.
1826 std::string upperCase = Tok.getString().str();
1827 std::string lowerCase = LowercaseString(upperCase);
1828 unsigned RegNum = MatchRegisterName(lowerCase);
1830 RegNum = StringSwitch<unsigned>(lowerCase)
1831 .Case("r13", ARM::SP)
1832 .Case("r14", ARM::LR)
1833 .Case("r15", ARM::PC)
1834 .Case("ip", ARM::R12)
1837 if (!RegNum) return -1;
1839 Parser.Lex(); // Eat identifier token.
1842 // Also check for an index operand. This is only legal for vector registers,
1843 // but that'll get caught OK in operand matching, so we don't need to
1844 // explicitly filter everything else out here.
1845 if (Parser.getTok().is(AsmToken::LBrac)) {
1846 SMLoc SIdx = Parser.getTok().getLoc();
1847 Parser.Lex(); // Eat left bracket token.
1849 const MCExpr *ImmVal;
1850 if (getParser().ParseExpression(ImmVal))
1851 return MatchOperand_ParseFail;
1852 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
1854 TokError("immediate value expected for vector index");
1855 return MatchOperand_ParseFail;
1858 SMLoc E = Parser.getTok().getLoc();
1859 if (Parser.getTok().isNot(AsmToken::RBrac)) {
1860 Error(E, "']' expected");
1861 return MatchOperand_ParseFail;
1864 Parser.Lex(); // Eat right bracket token.
1866 Operands.push_back(ARMOperand::CreateVectorIndex(MCE->getValue(),
1875 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1876 // If a recoverable error occurs, return 1. If an irrecoverable error
1877 // occurs, return -1. An irrecoverable error is one where tokens have been
1878 // consumed in the process of trying to parse the shifter (i.e., when it is
1879 // indeed a shifter operand, but malformed).
1880 int ARMAsmParser::tryParseShiftRegister(
1881 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1882 SMLoc S = Parser.getTok().getLoc();
1883 const AsmToken &Tok = Parser.getTok();
1884 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1886 std::string upperCase = Tok.getString().str();
1887 std::string lowerCase = LowercaseString(upperCase);
1888 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1889 .Case("lsl", ARM_AM::lsl)
1890 .Case("lsr", ARM_AM::lsr)
1891 .Case("asr", ARM_AM::asr)
1892 .Case("ror", ARM_AM::ror)
1893 .Case("rrx", ARM_AM::rrx)
1894 .Default(ARM_AM::no_shift);
1896 if (ShiftTy == ARM_AM::no_shift)
1899 Parser.Lex(); // Eat the operator.
1901 // The source register for the shift has already been added to the
1902 // operand list, so we need to pop it off and combine it into the shifted
1903 // register operand instead.
1904 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1905 if (!PrevOp->isReg())
1906 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1907 int SrcReg = PrevOp->getReg();
1910 if (ShiftTy == ARM_AM::rrx) {
1911 // RRX Doesn't have an explicit shift amount. The encoder expects
1912 // the shift register to be the same as the source register. Seems odd,
1916 // Figure out if this is shifted by a constant or a register (for non-RRX).
1917 if (Parser.getTok().is(AsmToken::Hash)) {
1918 Parser.Lex(); // Eat hash.
1919 SMLoc ImmLoc = Parser.getTok().getLoc();
1920 const MCExpr *ShiftExpr = 0;
1921 if (getParser().ParseExpression(ShiftExpr)) {
1922 Error(ImmLoc, "invalid immediate shift value");
1925 // The expression must be evaluatable as an immediate.
1926 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1928 Error(ImmLoc, "invalid immediate shift value");
1931 // Range check the immediate.
1932 // lsl, ror: 0 <= imm <= 31
1933 // lsr, asr: 0 <= imm <= 32
1934 Imm = CE->getValue();
1936 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1937 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1938 Error(ImmLoc, "immediate shift value out of range");
1941 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1942 ShiftReg = tryParseRegister();
1943 SMLoc L = Parser.getTok().getLoc();
1944 if (ShiftReg == -1) {
1945 Error (L, "expected immediate or register in shift operand");
1949 Error (Parser.getTok().getLoc(),
1950 "expected immediate or register in shift operand");
1955 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1956 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1958 S, Parser.getTok().getLoc()));
1960 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1961 S, Parser.getTok().getLoc()));
1967 /// Try to parse a register name. The token must be an Identifier when called.
1968 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1969 /// if there is a "writeback". 'true' if it's not a register.
1971 /// TODO this is likely to change to allow different register types and or to
1972 /// parse for a specific register type.
1974 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1975 SMLoc S = Parser.getTok().getLoc();
1976 int RegNo = tryParseRegister();
1980 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1982 const AsmToken &ExclaimTok = Parser.getTok();
1983 if (ExclaimTok.is(AsmToken::Exclaim)) {
1984 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1985 ExclaimTok.getLoc()));
1986 Parser.Lex(); // Eat exclaim token
1990 // Also check for an index operand. This is only legal for vector registers,
1991 // but that'll get caught OK in operand matching, so we don't need to
1992 // explicitly filter everything else out here.
1993 if (Parser.getTok().is(AsmToken::LBrac)) {
1994 SMLoc SIdx = Parser.getTok().getLoc();
1995 Parser.Lex(); // Eat left bracket token.
1997 const MCExpr *ImmVal;
1998 if (getParser().ParseExpression(ImmVal))
1999 return MatchOperand_ParseFail;
2000 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
2002 TokError("immediate value expected for vector index");
2003 return MatchOperand_ParseFail;
2006 SMLoc E = Parser.getTok().getLoc();
2007 if (Parser.getTok().isNot(AsmToken::RBrac)) {
2008 Error(E, "']' expected");
2009 return MatchOperand_ParseFail;
2012 Parser.Lex(); // Eat right bracket token.
2014 Operands.push_back(ARMOperand::CreateVectorIndex(MCE->getValue(),
2022 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
2023 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
2025 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
2026 // Use the same layout as the tablegen'erated register name matcher. Ugly,
2028 switch (Name.size()) {
2031 if (Name[0] != CoprocOp)
2048 if (Name[0] != CoprocOp || Name[1] != '1')
2052 case '0': return 10;
2053 case '1': return 11;
2054 case '2': return 12;
2055 case '3': return 13;
2056 case '4': return 14;
2057 case '5': return 15;
2065 /// parseITCondCode - Try to parse a condition code for an IT instruction.
2066 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2067 parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2068 SMLoc S = Parser.getTok().getLoc();
2069 const AsmToken &Tok = Parser.getTok();
2070 if (!Tok.is(AsmToken::Identifier))
2071 return MatchOperand_NoMatch;
2072 unsigned CC = StringSwitch<unsigned>(Tok.getString())
2073 .Case("eq", ARMCC::EQ)
2074 .Case("ne", ARMCC::NE)
2075 .Case("hs", ARMCC::HS)
2076 .Case("cs", ARMCC::HS)
2077 .Case("lo", ARMCC::LO)
2078 .Case("cc", ARMCC::LO)
2079 .Case("mi", ARMCC::MI)
2080 .Case("pl", ARMCC::PL)
2081 .Case("vs", ARMCC::VS)
2082 .Case("vc", ARMCC::VC)
2083 .Case("hi", ARMCC::HI)
2084 .Case("ls", ARMCC::LS)
2085 .Case("ge", ARMCC::GE)
2086 .Case("lt", ARMCC::LT)
2087 .Case("gt", ARMCC::GT)
2088 .Case("le", ARMCC::LE)
2089 .Case("al", ARMCC::AL)
2092 return MatchOperand_NoMatch;
2093 Parser.Lex(); // Eat the token.
2095 Operands.push_back(ARMOperand::CreateCondCode(ARMCC::CondCodes(CC), S));
2097 return MatchOperand_Success;
2100 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
2101 /// token must be an Identifier when called, and if it is a coprocessor
2102 /// number, the token is eaten and the operand is added to the operand list.
2103 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2104 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2105 SMLoc S = Parser.getTok().getLoc();
2106 const AsmToken &Tok = Parser.getTok();
2107 if (Tok.isNot(AsmToken::Identifier))
2108 return MatchOperand_NoMatch;
2110 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
2112 return MatchOperand_NoMatch;
2114 Parser.Lex(); // Eat identifier token.
2115 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
2116 return MatchOperand_Success;
2119 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
2120 /// token must be an Identifier when called, and if it is a coprocessor
2121 /// number, the token is eaten and the operand is added to the operand list.
2122 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2123 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2124 SMLoc S = Parser.getTok().getLoc();
2125 const AsmToken &Tok = Parser.getTok();
2126 if (Tok.isNot(AsmToken::Identifier))
2127 return MatchOperand_NoMatch;
2129 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
2131 return MatchOperand_NoMatch;
2133 Parser.Lex(); // Eat identifier token.
2134 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
2135 return MatchOperand_Success;
2138 /// parseCoprocOptionOperand - Try to parse an coprocessor option operand.
2139 /// coproc_option : '{' imm0_255 '}'
2140 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2141 parseCoprocOptionOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2142 SMLoc S = Parser.getTok().getLoc();
2144 // If this isn't a '{', this isn't a coprocessor immediate operand.
2145 if (Parser.getTok().isNot(AsmToken::LCurly))
2146 return MatchOperand_NoMatch;
2147 Parser.Lex(); // Eat the '{'
2150 SMLoc Loc = Parser.getTok().getLoc();
2151 if (getParser().ParseExpression(Expr)) {
2152 Error(Loc, "illegal expression");
2153 return MatchOperand_ParseFail;
2155 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2156 if (!CE || CE->getValue() < 0 || CE->getValue() > 255) {
2157 Error(Loc, "coprocessor option must be an immediate in range [0, 255]");
2158 return MatchOperand_ParseFail;
2160 int Val = CE->getValue();
2162 // Check for and consume the closing '}'
2163 if (Parser.getTok().isNot(AsmToken::RCurly))
2164 return MatchOperand_ParseFail;
2165 SMLoc E = Parser.getTok().getLoc();
2166 Parser.Lex(); // Eat the '}'
2168 Operands.push_back(ARMOperand::CreateCoprocOption(Val, S, E));
2169 return MatchOperand_Success;
2172 // For register list parsing, we need to map from raw GPR register numbering
2173 // to the enumeration values. The enumeration values aren't sorted by
2174 // register number due to our using "sp", "lr" and "pc" as canonical names.
2175 static unsigned getNextRegister(unsigned Reg) {
2176 // If this is a GPR, we need to do it manually, otherwise we can rely
2177 // on the sort ordering of the enumeration since the other reg-classes
2179 if (!ARMMCRegisterClasses[ARM::GPRRegClassID].contains(Reg))
2182 default: assert(0 && "Invalid GPR number!");
2183 case ARM::R0: return ARM::R1; case ARM::R1: return ARM::R2;
2184 case ARM::R2: return ARM::R3; case ARM::R3: return ARM::R4;
2185 case ARM::R4: return ARM::R5; case ARM::R5: return ARM::R6;
2186 case ARM::R6: return ARM::R7; case ARM::R7: return ARM::R8;
2187 case ARM::R8: return ARM::R9; case ARM::R9: return ARM::R10;
2188 case ARM::R10: return ARM::R11; case ARM::R11: return ARM::R12;
2189 case ARM::R12: return ARM::SP; case ARM::SP: return ARM::LR;
2190 case ARM::LR: return ARM::PC; case ARM::PC: return ARM::R0;
2194 /// Parse a register list.
2196 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2197 assert(Parser.getTok().is(AsmToken::LCurly) &&
2198 "Token is not a Left Curly Brace");
2199 SMLoc S = Parser.getTok().getLoc();
2200 Parser.Lex(); // Eat '{' token.
2201 SMLoc RegLoc = Parser.getTok().getLoc();
2203 // Check the first register in the list to see what register class
2204 // this is a list of.
2205 int Reg = tryParseRegister();
2207 return Error(RegLoc, "register expected");
2209 MCRegisterClass *RC;
2210 if (ARMMCRegisterClasses[ARM::GPRRegClassID].contains(Reg))
2211 RC = &ARMMCRegisterClasses[ARM::GPRRegClassID];
2212 else if (ARMMCRegisterClasses[ARM::DPRRegClassID].contains(Reg))
2213 RC = &ARMMCRegisterClasses[ARM::DPRRegClassID];
2214 else if (ARMMCRegisterClasses[ARM::SPRRegClassID].contains(Reg))
2215 RC = &ARMMCRegisterClasses[ARM::SPRRegClassID];
2217 return Error(RegLoc, "invalid register in register list");
2219 // The reglist instructions have at most 16 registers, so reserve
2220 // space for that many.
2221 SmallVector<std::pair<unsigned, SMLoc>, 16> Registers;
2222 // Store the first register.
2223 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2225 // This starts immediately after the first register token in the list,
2226 // so we can see either a comma or a minus (range separator) as a legal
2228 while (Parser.getTok().is(AsmToken::Comma) ||
2229 Parser.getTok().is(AsmToken::Minus)) {
2230 if (Parser.getTok().is(AsmToken::Minus)) {
2231 Parser.Lex(); // Eat the comma.
2232 SMLoc EndLoc = Parser.getTok().getLoc();
2233 int EndReg = tryParseRegister();
2235 return Error(EndLoc, "register expected");
2236 // If the register is the same as the start reg, there's nothing
2240 // The register must be in the same register class as the first.
2241 if (!RC->contains(EndReg))
2242 return Error(EndLoc, "invalid register in register list");
2243 // Ranges must go from low to high.
2244 if (getARMRegisterNumbering(Reg) > getARMRegisterNumbering(EndReg))
2245 return Error(EndLoc, "bad range in register list");
2247 // Add all the registers in the range to the register list.
2248 while (Reg != EndReg) {
2249 Reg = getNextRegister(Reg);
2250 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2254 Parser.Lex(); // Eat the comma.
2255 RegLoc = Parser.getTok().getLoc();
2257 Reg = tryParseRegister();
2259 return Error(RegLoc, "register expected");
2260 // The register must be in the same register class as the first.
2261 if (!RC->contains(Reg))
2262 return Error(RegLoc, "invalid register in register list");
2263 // List must be monotonically increasing.
2264 if (getARMRegisterNumbering(Reg) <= getARMRegisterNumbering(OldReg))
2265 return Error(RegLoc, "register list not in ascending order");
2266 // VFP register lists must also be contiguous.
2267 // It's OK to use the enumeration values directly here rather, as the
2268 // VFP register classes have the enum sorted properly.
2269 if (RC != &ARMMCRegisterClasses[ARM::GPRRegClassID] &&
2271 return Error(RegLoc, "non-contiguous register range");
2272 Registers.push_back(std::pair<unsigned, SMLoc>(Reg, RegLoc));
2275 SMLoc E = Parser.getTok().getLoc();
2276 if (Parser.getTok().isNot(AsmToken::RCurly))
2277 return Error(E, "'}' expected");
2278 Parser.Lex(); // Eat '}' token.
2280 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
2284 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
2285 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2286 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2287 SMLoc S = Parser.getTok().getLoc();
2288 const AsmToken &Tok = Parser.getTok();
2289 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2290 StringRef OptStr = Tok.getString();
2292 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
2293 .Case("sy", ARM_MB::SY)
2294 .Case("st", ARM_MB::ST)
2295 .Case("sh", ARM_MB::ISH)
2296 .Case("ish", ARM_MB::ISH)
2297 .Case("shst", ARM_MB::ISHST)
2298 .Case("ishst", ARM_MB::ISHST)
2299 .Case("nsh", ARM_MB::NSH)
2300 .Case("un", ARM_MB::NSH)
2301 .Case("nshst", ARM_MB::NSHST)
2302 .Case("unst", ARM_MB::NSHST)
2303 .Case("osh", ARM_MB::OSH)
2304 .Case("oshst", ARM_MB::OSHST)
2308 return MatchOperand_NoMatch;
2310 Parser.Lex(); // Eat identifier token.
2311 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
2312 return MatchOperand_Success;
2315 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
2316 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2317 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2318 SMLoc S = Parser.getTok().getLoc();
2319 const AsmToken &Tok = Parser.getTok();
2320 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2321 StringRef IFlagsStr = Tok.getString();
2323 // An iflags string of "none" is interpreted to mean that none of the AIF
2324 // bits are set. Not a terribly useful instruction, but a valid encoding.
2325 unsigned IFlags = 0;
2326 if (IFlagsStr != "none") {
2327 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
2328 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
2329 .Case("a", ARM_PROC::A)
2330 .Case("i", ARM_PROC::I)
2331 .Case("f", ARM_PROC::F)
2334 // If some specific iflag is already set, it means that some letter is
2335 // present more than once, this is not acceptable.
2336 if (Flag == ~0U || (IFlags & Flag))
2337 return MatchOperand_NoMatch;
2343 Parser.Lex(); // Eat identifier token.
2344 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
2345 return MatchOperand_Success;
2348 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
2349 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2350 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2351 SMLoc S = Parser.getTok().getLoc();
2352 const AsmToken &Tok = Parser.getTok();
2353 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
2354 StringRef Mask = Tok.getString();
2357 // See ARMv6-M 10.1.1
2358 unsigned FlagsVal = StringSwitch<unsigned>(Mask)
2368 .Case("primask", 16)
2369 .Case("basepri", 17)
2370 .Case("basepri_max", 18)
2371 .Case("faultmask", 19)
2372 .Case("control", 20)
2375 if (FlagsVal == ~0U)
2376 return MatchOperand_NoMatch;
2378 if (!hasV7Ops() && FlagsVal >= 17 && FlagsVal <= 19)
2379 // basepri, basepri_max and faultmask only valid for V7m.
2380 return MatchOperand_NoMatch;
2382 Parser.Lex(); // Eat identifier token.
2383 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2384 return MatchOperand_Success;
2387 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
2388 size_t Start = 0, Next = Mask.find('_');
2389 StringRef Flags = "";
2390 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
2391 if (Next != StringRef::npos)
2392 Flags = Mask.slice(Next+1, Mask.size());
2394 // FlagsVal contains the complete mask:
2396 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2397 unsigned FlagsVal = 0;
2399 if (SpecReg == "apsr") {
2400 FlagsVal = StringSwitch<unsigned>(Flags)
2401 .Case("nzcvq", 0x8) // same as CPSR_f
2402 .Case("g", 0x4) // same as CPSR_s
2403 .Case("nzcvqg", 0xc) // same as CPSR_fs
2406 if (FlagsVal == ~0U) {
2408 return MatchOperand_NoMatch;
2410 FlagsVal = 8; // No flag
2412 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
2413 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
2415 for (int i = 0, e = Flags.size(); i != e; ++i) {
2416 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
2423 // If some specific flag is already set, it means that some letter is
2424 // present more than once, this is not acceptable.
2425 if (FlagsVal == ~0U || (FlagsVal & Flag))
2426 return MatchOperand_NoMatch;
2429 } else // No match for special register.
2430 return MatchOperand_NoMatch;
2432 // Special register without flags are equivalent to "fc" flags.
2436 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2437 if (SpecReg == "spsr")
2440 Parser.Lex(); // Eat identifier token.
2441 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2442 return MatchOperand_Success;
2445 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2446 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
2447 int Low, int High) {
2448 const AsmToken &Tok = Parser.getTok();
2449 if (Tok.isNot(AsmToken::Identifier)) {
2450 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2451 return MatchOperand_ParseFail;
2453 StringRef ShiftName = Tok.getString();
2454 std::string LowerOp = LowercaseString(Op);
2455 std::string UpperOp = UppercaseString(Op);
2456 if (ShiftName != LowerOp && ShiftName != UpperOp) {
2457 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2458 return MatchOperand_ParseFail;
2460 Parser.Lex(); // Eat shift type token.
2462 // There must be a '#' and a shift amount.
2463 if (Parser.getTok().isNot(AsmToken::Hash)) {
2464 Error(Parser.getTok().getLoc(), "'#' expected");
2465 return MatchOperand_ParseFail;
2467 Parser.Lex(); // Eat hash token.
2469 const MCExpr *ShiftAmount;
2470 SMLoc Loc = Parser.getTok().getLoc();
2471 if (getParser().ParseExpression(ShiftAmount)) {
2472 Error(Loc, "illegal expression");
2473 return MatchOperand_ParseFail;
2475 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2477 Error(Loc, "constant expression expected");
2478 return MatchOperand_ParseFail;
2480 int Val = CE->getValue();
2481 if (Val < Low || Val > High) {
2482 Error(Loc, "immediate value out of range");
2483 return MatchOperand_ParseFail;
2486 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
2488 return MatchOperand_Success;
2491 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2492 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2493 const AsmToken &Tok = Parser.getTok();
2494 SMLoc S = Tok.getLoc();
2495 if (Tok.isNot(AsmToken::Identifier)) {
2496 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2497 return MatchOperand_ParseFail;
2499 int Val = StringSwitch<int>(Tok.getString())
2503 Parser.Lex(); // Eat the token.
2506 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2507 return MatchOperand_ParseFail;
2509 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
2511 S, Parser.getTok().getLoc()));
2512 return MatchOperand_Success;
2515 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
2516 /// instructions. Legal values are:
2517 /// lsl #n 'n' in [0,31]
2518 /// asr #n 'n' in [1,32]
2519 /// n == 32 encoded as n == 0.
2520 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2521 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2522 const AsmToken &Tok = Parser.getTok();
2523 SMLoc S = Tok.getLoc();
2524 if (Tok.isNot(AsmToken::Identifier)) {
2525 Error(S, "shift operator 'asr' or 'lsl' expected");
2526 return MatchOperand_ParseFail;
2528 StringRef ShiftName = Tok.getString();
2530 if (ShiftName == "lsl" || ShiftName == "LSL")
2532 else if (ShiftName == "asr" || ShiftName == "ASR")
2535 Error(S, "shift operator 'asr' or 'lsl' expected");
2536 return MatchOperand_ParseFail;
2538 Parser.Lex(); // Eat the operator.
2540 // A '#' and a shift amount.
2541 if (Parser.getTok().isNot(AsmToken::Hash)) {
2542 Error(Parser.getTok().getLoc(), "'#' expected");
2543 return MatchOperand_ParseFail;
2545 Parser.Lex(); // Eat hash token.
2547 const MCExpr *ShiftAmount;
2548 SMLoc E = Parser.getTok().getLoc();
2549 if (getParser().ParseExpression(ShiftAmount)) {
2550 Error(E, "malformed shift expression");
2551 return MatchOperand_ParseFail;
2553 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2555 Error(E, "shift amount must be an immediate");
2556 return MatchOperand_ParseFail;
2559 int64_t Val = CE->getValue();
2561 // Shift amount must be in [1,32]
2562 if (Val < 1 || Val > 32) {
2563 Error(E, "'asr' shift amount must be in range [1,32]");
2564 return MatchOperand_ParseFail;
2566 // asr #32 encoded as asr #0, but is not allowed in Thumb2 mode.
2567 if (isThumb() && Val == 32) {
2568 Error(E, "'asr #32' shift amount not allowed in Thumb mode");
2569 return MatchOperand_ParseFail;
2571 if (Val == 32) Val = 0;
2573 // Shift amount must be in [1,32]
2574 if (Val < 0 || Val > 31) {
2575 Error(E, "'lsr' shift amount must be in range [0,31]");
2576 return MatchOperand_ParseFail;
2580 E = Parser.getTok().getLoc();
2581 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2583 return MatchOperand_Success;
2586 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2587 /// of instructions. Legal values are:
2588 /// ror #n 'n' in {0, 8, 16, 24}
2589 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2590 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2591 const AsmToken &Tok = Parser.getTok();
2592 SMLoc S = Tok.getLoc();
2593 if (Tok.isNot(AsmToken::Identifier))
2594 return MatchOperand_NoMatch;
2595 StringRef ShiftName = Tok.getString();
2596 if (ShiftName != "ror" && ShiftName != "ROR")
2597 return MatchOperand_NoMatch;
2598 Parser.Lex(); // Eat the operator.
2600 // A '#' and a rotate amount.
2601 if (Parser.getTok().isNot(AsmToken::Hash)) {
2602 Error(Parser.getTok().getLoc(), "'#' expected");
2603 return MatchOperand_ParseFail;
2605 Parser.Lex(); // Eat hash token.
2607 const MCExpr *ShiftAmount;
2608 SMLoc E = Parser.getTok().getLoc();
2609 if (getParser().ParseExpression(ShiftAmount)) {
2610 Error(E, "malformed rotate expression");
2611 return MatchOperand_ParseFail;
2613 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2615 Error(E, "rotate amount must be an immediate");
2616 return MatchOperand_ParseFail;
2619 int64_t Val = CE->getValue();
2620 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2621 // normally, zero is represented in asm by omitting the rotate operand
2623 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2624 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2625 return MatchOperand_ParseFail;
2628 E = Parser.getTok().getLoc();
2629 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2631 return MatchOperand_Success;
2634 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2635 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2636 SMLoc S = Parser.getTok().getLoc();
2637 // The bitfield descriptor is really two operands, the LSB and the width.
2638 if (Parser.getTok().isNot(AsmToken::Hash)) {
2639 Error(Parser.getTok().getLoc(), "'#' expected");
2640 return MatchOperand_ParseFail;
2642 Parser.Lex(); // Eat hash token.
2644 const MCExpr *LSBExpr;
2645 SMLoc E = Parser.getTok().getLoc();
2646 if (getParser().ParseExpression(LSBExpr)) {
2647 Error(E, "malformed immediate expression");
2648 return MatchOperand_ParseFail;
2650 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2652 Error(E, "'lsb' operand must be an immediate");
2653 return MatchOperand_ParseFail;
2656 int64_t LSB = CE->getValue();
2657 // The LSB must be in the range [0,31]
2658 if (LSB < 0 || LSB > 31) {
2659 Error(E, "'lsb' operand must be in the range [0,31]");
2660 return MatchOperand_ParseFail;
2662 E = Parser.getTok().getLoc();
2664 // Expect another immediate operand.
2665 if (Parser.getTok().isNot(AsmToken::Comma)) {
2666 Error(Parser.getTok().getLoc(), "too few operands");
2667 return MatchOperand_ParseFail;
2669 Parser.Lex(); // Eat hash token.
2670 if (Parser.getTok().isNot(AsmToken::Hash)) {
2671 Error(Parser.getTok().getLoc(), "'#' expected");
2672 return MatchOperand_ParseFail;
2674 Parser.Lex(); // Eat hash token.
2676 const MCExpr *WidthExpr;
2677 if (getParser().ParseExpression(WidthExpr)) {
2678 Error(E, "malformed immediate expression");
2679 return MatchOperand_ParseFail;
2681 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2683 Error(E, "'width' operand must be an immediate");
2684 return MatchOperand_ParseFail;
2687 int64_t Width = CE->getValue();
2688 // The LSB must be in the range [1,32-lsb]
2689 if (Width < 1 || Width > 32 - LSB) {
2690 Error(E, "'width' operand must be in the range [1,32-lsb]");
2691 return MatchOperand_ParseFail;
2693 E = Parser.getTok().getLoc();
2695 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2697 return MatchOperand_Success;
2700 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2701 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2702 // Check for a post-index addressing register operand. Specifically:
2703 // postidx_reg := '+' register {, shift}
2704 // | '-' register {, shift}
2705 // | register {, shift}
2707 // This method must return MatchOperand_NoMatch without consuming any tokens
2708 // in the case where there is no match, as other alternatives take other
2710 AsmToken Tok = Parser.getTok();
2711 SMLoc S = Tok.getLoc();
2712 bool haveEaten = false;
2715 if (Tok.is(AsmToken::Plus)) {
2716 Parser.Lex(); // Eat the '+' token.
2718 } else if (Tok.is(AsmToken::Minus)) {
2719 Parser.Lex(); // Eat the '-' token.
2723 if (Parser.getTok().is(AsmToken::Identifier))
2724 Reg = tryParseRegister();
2727 return MatchOperand_NoMatch;
2728 Error(Parser.getTok().getLoc(), "register expected");
2729 return MatchOperand_ParseFail;
2731 SMLoc E = Parser.getTok().getLoc();
2733 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2734 unsigned ShiftImm = 0;
2735 if (Parser.getTok().is(AsmToken::Comma)) {
2736 Parser.Lex(); // Eat the ','.
2737 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2738 return MatchOperand_ParseFail;
2741 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2744 return MatchOperand_Success;
2747 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2748 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2749 // Check for a post-index addressing register operand. Specifically:
2750 // am3offset := '+' register
2757 // This method must return MatchOperand_NoMatch without consuming any tokens
2758 // in the case where there is no match, as other alternatives take other
2760 AsmToken Tok = Parser.getTok();
2761 SMLoc S = Tok.getLoc();
2763 // Do immediates first, as we always parse those if we have a '#'.
2764 if (Parser.getTok().is(AsmToken::Hash)) {
2765 Parser.Lex(); // Eat the '#'.
2766 // Explicitly look for a '-', as we need to encode negative zero
2768 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2769 const MCExpr *Offset;
2770 if (getParser().ParseExpression(Offset))
2771 return MatchOperand_ParseFail;
2772 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2774 Error(S, "constant expression expected");
2775 return MatchOperand_ParseFail;
2777 SMLoc E = Tok.getLoc();
2778 // Negative zero is encoded as the flag value INT32_MIN.
2779 int32_t Val = CE->getValue();
2780 if (isNegative && Val == 0)
2784 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2786 return MatchOperand_Success;
2790 bool haveEaten = false;
2793 if (Tok.is(AsmToken::Plus)) {
2794 Parser.Lex(); // Eat the '+' token.
2796 } else if (Tok.is(AsmToken::Minus)) {
2797 Parser.Lex(); // Eat the '-' token.
2801 if (Parser.getTok().is(AsmToken::Identifier))
2802 Reg = tryParseRegister();
2805 return MatchOperand_NoMatch;
2806 Error(Parser.getTok().getLoc(), "register expected");
2807 return MatchOperand_ParseFail;
2809 SMLoc E = Parser.getTok().getLoc();
2811 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2814 return MatchOperand_Success;
2817 /// cvtT2LdrdPre - Convert parsed operands to MCInst.
2818 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2819 /// when they refer multiple MIOperands inside a single one.
2821 cvtT2LdrdPre(MCInst &Inst, unsigned Opcode,
2822 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2824 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2825 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2826 // Create a writeback register dummy placeholder.
2827 Inst.addOperand(MCOperand::CreateReg(0));
2829 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
2831 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2835 /// cvtT2StrdPre - Convert parsed operands to MCInst.
2836 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2837 /// when they refer multiple MIOperands inside a single one.
2839 cvtT2StrdPre(MCInst &Inst, unsigned Opcode,
2840 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2841 // Create a writeback register dummy placeholder.
2842 Inst.addOperand(MCOperand::CreateReg(0));
2844 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2845 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2847 ((ARMOperand*)Operands[4])->addMemImm8s4OffsetOperands(Inst, 2);
2849 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2853 /// cvtLdWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
2854 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2855 /// when they refer multiple MIOperands inside a single one.
2857 cvtLdWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
2858 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2859 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2861 // Create a writeback register dummy placeholder.
2862 Inst.addOperand(MCOperand::CreateImm(0));
2864 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
2865 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2869 /// cvtStWriteBackRegT2AddrModeImm8 - Convert parsed operands to MCInst.
2870 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2871 /// when they refer multiple MIOperands inside a single one.
2873 cvtStWriteBackRegT2AddrModeImm8(MCInst &Inst, unsigned Opcode,
2874 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2875 // Create a writeback register dummy placeholder.
2876 Inst.addOperand(MCOperand::CreateImm(0));
2877 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2878 ((ARMOperand*)Operands[3])->addMemImm8OffsetOperands(Inst, 2);
2879 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2883 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2884 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2885 /// when they refer multiple MIOperands inside a single one.
2887 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2888 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2889 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2891 // Create a writeback register dummy placeholder.
2892 Inst.addOperand(MCOperand::CreateImm(0));
2894 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2895 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2899 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2900 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2901 /// when they refer multiple MIOperands inside a single one.
2903 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2904 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2905 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2907 // Create a writeback register dummy placeholder.
2908 Inst.addOperand(MCOperand::CreateImm(0));
2910 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2911 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2916 /// cvtStWriteBackRegAddrModeImm12 - 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 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2921 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2922 // Create a writeback register dummy placeholder.
2923 Inst.addOperand(MCOperand::CreateImm(0));
2924 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2925 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2926 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2930 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2931 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2932 /// when they refer multiple MIOperands inside a single one.
2934 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2935 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2936 // Create a writeback register dummy placeholder.
2937 Inst.addOperand(MCOperand::CreateImm(0));
2938 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2939 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2940 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2944 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2945 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2946 /// when they refer multiple MIOperands inside a single one.
2948 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2949 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2950 // Create a writeback register dummy placeholder.
2951 Inst.addOperand(MCOperand::CreateImm(0));
2952 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2953 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2954 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2958 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2959 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2960 /// when they refer multiple MIOperands inside a single one.
2962 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2963 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2965 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2966 // Create a writeback register dummy placeholder.
2967 Inst.addOperand(MCOperand::CreateImm(0));
2969 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2971 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2973 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2977 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2978 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2979 /// when they refer multiple MIOperands inside a single one.
2981 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2982 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2984 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2985 // Create a writeback register dummy placeholder.
2986 Inst.addOperand(MCOperand::CreateImm(0));
2988 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2990 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2992 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2996 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2997 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2998 /// when they refer multiple MIOperands inside a single one.
3000 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
3001 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3002 // Create a writeback register dummy placeholder.
3003 Inst.addOperand(MCOperand::CreateImm(0));
3005 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3007 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3009 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
3011 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3015 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
3016 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3017 /// when they refer multiple MIOperands inside a single one.
3019 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
3020 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3021 // Create a writeback register dummy placeholder.
3022 Inst.addOperand(MCOperand::CreateImm(0));
3024 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3026 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
3028 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
3030 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3034 /// cvtLdrdPre - Convert parsed operands to MCInst.
3035 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3036 /// when they refer multiple MIOperands inside a single one.
3038 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
3039 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3041 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3042 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3043 // Create a writeback register dummy placeholder.
3044 Inst.addOperand(MCOperand::CreateImm(0));
3046 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3048 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3052 /// cvtStrdPre - Convert parsed operands to MCInst.
3053 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3054 /// when they refer multiple MIOperands inside a single one.
3056 cvtStrdPre(MCInst &Inst, unsigned Opcode,
3057 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3058 // Create a writeback register dummy placeholder.
3059 Inst.addOperand(MCOperand::CreateImm(0));
3061 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3062 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3064 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
3066 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3070 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
3071 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3072 /// when they refer multiple MIOperands inside a single one.
3074 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
3075 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3076 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
3077 // Create a writeback register dummy placeholder.
3078 Inst.addOperand(MCOperand::CreateImm(0));
3079 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
3080 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
3084 /// cvtThumbMultiple- Convert parsed operands to MCInst.
3085 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
3086 /// when they refer multiple MIOperands inside a single one.
3088 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
3089 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3090 // The second source operand must be the same register as the destination
3092 if (Operands.size() == 6 &&
3093 (((ARMOperand*)Operands[3])->getReg() !=
3094 ((ARMOperand*)Operands[5])->getReg()) &&
3095 (((ARMOperand*)Operands[3])->getReg() !=
3096 ((ARMOperand*)Operands[4])->getReg())) {
3097 Error(Operands[3]->getStartLoc(),
3098 "destination register must match source register");
3101 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
3102 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
3103 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
3104 // If we have a three-operand form, use that, else the second source operand
3105 // is just the destination operand again.
3106 if (Operands.size() == 6)
3107 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
3109 Inst.addOperand(Inst.getOperand(0));
3110 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
3115 /// Parse an ARM memory expression, return false if successful else return true
3116 /// or an error. The first token must be a '[' when called.
3118 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3120 assert(Parser.getTok().is(AsmToken::LBrac) &&
3121 "Token is not a Left Bracket");
3122 S = Parser.getTok().getLoc();
3123 Parser.Lex(); // Eat left bracket token.
3125 const AsmToken &BaseRegTok = Parser.getTok();
3126 int BaseRegNum = tryParseRegister();
3127 if (BaseRegNum == -1)
3128 return Error(BaseRegTok.getLoc(), "register expected");
3130 // The next token must either be a comma or a closing bracket.
3131 const AsmToken &Tok = Parser.getTok();
3132 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
3133 return Error(Tok.getLoc(), "malformed memory operand");
3135 if (Tok.is(AsmToken::RBrac)) {
3137 Parser.Lex(); // Eat right bracket token.
3139 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
3140 0, 0, false, S, E));
3142 // If there's a pre-indexing writeback marker, '!', just add it as a token
3143 // operand. It's rather odd, but syntactically valid.
3144 if (Parser.getTok().is(AsmToken::Exclaim)) {
3145 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3146 Parser.Lex(); // Eat the '!'.
3152 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
3153 Parser.Lex(); // Eat the comma.
3155 // If we have a ':', it's an alignment specifier.
3156 if (Parser.getTok().is(AsmToken::Colon)) {
3157 Parser.Lex(); // Eat the ':'.
3158 E = Parser.getTok().getLoc();
3161 if (getParser().ParseExpression(Expr))
3164 // The expression has to be a constant. Memory references with relocations
3165 // don't come through here, as they use the <label> forms of the relevant
3167 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3169 return Error (E, "constant expression expected");
3172 switch (CE->getValue()) {
3174 return Error(E, "alignment specifier must be 64, 128, or 256 bits");
3175 case 64: Align = 8; break;
3176 case 128: Align = 16; break;
3177 case 256: Align = 32; break;
3180 // Now we should have the closing ']'
3181 E = Parser.getTok().getLoc();
3182 if (Parser.getTok().isNot(AsmToken::RBrac))
3183 return Error(E, "']' expected");
3184 Parser.Lex(); // Eat right bracket token.
3186 // Don't worry about range checking the value here. That's handled by
3187 // the is*() predicates.
3188 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0,
3189 ARM_AM::no_shift, 0, Align,
3192 // If there's a pre-indexing writeback marker, '!', just add it as a token
3194 if (Parser.getTok().is(AsmToken::Exclaim)) {
3195 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3196 Parser.Lex(); // Eat the '!'.
3202 // If we have a '#', it's an immediate offset, else assume it's a register
3204 if (Parser.getTok().is(AsmToken::Hash)) {
3205 Parser.Lex(); // Eat the '#'.
3206 E = Parser.getTok().getLoc();
3208 bool isNegative = getParser().getTok().is(AsmToken::Minus);
3209 const MCExpr *Offset;
3210 if (getParser().ParseExpression(Offset))
3213 // The expression has to be a constant. Memory references with relocations
3214 // don't come through here, as they use the <label> forms of the relevant
3216 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
3218 return Error (E, "constant expression expected");
3220 // If the constant was #-0, represent it as INT32_MIN.
3221 int32_t Val = CE->getValue();
3222 if (isNegative && Val == 0)
3223 CE = MCConstantExpr::Create(INT32_MIN, getContext());
3225 // Now we should have the closing ']'
3226 E = Parser.getTok().getLoc();
3227 if (Parser.getTok().isNot(AsmToken::RBrac))
3228 return Error(E, "']' expected");
3229 Parser.Lex(); // Eat right bracket token.
3231 // Don't worry about range checking the value here. That's handled by
3232 // the is*() predicates.
3233 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
3234 ARM_AM::no_shift, 0, 0,
3237 // If there's a pre-indexing writeback marker, '!', just add it as a token
3239 if (Parser.getTok().is(AsmToken::Exclaim)) {
3240 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3241 Parser.Lex(); // Eat the '!'.
3247 // The register offset is optionally preceded by a '+' or '-'
3248 bool isNegative = false;
3249 if (Parser.getTok().is(AsmToken::Minus)) {
3251 Parser.Lex(); // Eat the '-'.
3252 } else if (Parser.getTok().is(AsmToken::Plus)) {
3254 Parser.Lex(); // Eat the '+'.
3257 E = Parser.getTok().getLoc();
3258 int OffsetRegNum = tryParseRegister();
3259 if (OffsetRegNum == -1)
3260 return Error(E, "register expected");
3262 // If there's a shift operator, handle it.
3263 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
3264 unsigned ShiftImm = 0;
3265 if (Parser.getTok().is(AsmToken::Comma)) {
3266 Parser.Lex(); // Eat the ','.
3267 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
3271 // Now we should have the closing ']'
3272 E = Parser.getTok().getLoc();
3273 if (Parser.getTok().isNot(AsmToken::RBrac))
3274 return Error(E, "']' expected");
3275 Parser.Lex(); // Eat right bracket token.
3277 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
3278 ShiftType, ShiftImm, 0, isNegative,
3281 // If there's a pre-indexing writeback marker, '!', just add it as a token
3283 if (Parser.getTok().is(AsmToken::Exclaim)) {
3284 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
3285 Parser.Lex(); // Eat the '!'.
3291 /// parseMemRegOffsetShift - one of these two:
3292 /// ( lsl | lsr | asr | ror ) , # shift_amount
3294 /// return true if it parses a shift otherwise it returns false.
3295 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
3297 SMLoc Loc = Parser.getTok().getLoc();
3298 const AsmToken &Tok = Parser.getTok();
3299 if (Tok.isNot(AsmToken::Identifier))
3301 StringRef ShiftName = Tok.getString();
3302 if (ShiftName == "lsl" || ShiftName == "LSL")
3304 else if (ShiftName == "lsr" || ShiftName == "LSR")
3306 else if (ShiftName == "asr" || ShiftName == "ASR")
3308 else if (ShiftName == "ror" || ShiftName == "ROR")
3310 else if (ShiftName == "rrx" || ShiftName == "RRX")
3313 return Error(Loc, "illegal shift operator");
3314 Parser.Lex(); // Eat shift type token.
3316 // rrx stands alone.
3318 if (St != ARM_AM::rrx) {
3319 Loc = Parser.getTok().getLoc();
3320 // A '#' and a shift amount.
3321 const AsmToken &HashTok = Parser.getTok();
3322 if (HashTok.isNot(AsmToken::Hash))
3323 return Error(HashTok.getLoc(), "'#' expected");
3324 Parser.Lex(); // Eat hash token.
3327 if (getParser().ParseExpression(Expr))
3329 // Range check the immediate.
3330 // lsl, ror: 0 <= imm <= 31
3331 // lsr, asr: 0 <= imm <= 32
3332 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
3334 return Error(Loc, "shift amount must be an immediate");
3335 int64_t Imm = CE->getValue();
3337 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
3338 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
3339 return Error(Loc, "immediate shift value out of range");
3346 /// parseFPImm - A floating point immediate expression operand.
3347 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
3348 parseFPImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3349 SMLoc S = Parser.getTok().getLoc();
3351 if (Parser.getTok().isNot(AsmToken::Hash))
3352 return MatchOperand_NoMatch;
3354 // Disambiguate the VMOV forms that can accept an FP immediate.
3355 // vmov.f32 <sreg>, #imm
3356 // vmov.f64 <dreg>, #imm
3357 // vmov.f32 <dreg>, #imm @ vector f32x2
3358 // vmov.f32 <qreg>, #imm @ vector f32x4
3360 // There are also the NEON VMOV instructions which expect an
3361 // integer constant. Make sure we don't try to parse an FPImm
3363 // vmov.i{8|16|32|64} <dreg|qreg>, #imm
3364 ARMOperand *TyOp = static_cast<ARMOperand*>(Operands[2]);
3365 if (!TyOp->isToken() || (TyOp->getToken() != ".f32" &&
3366 TyOp->getToken() != ".f64"))
3367 return MatchOperand_NoMatch;
3369 Parser.Lex(); // Eat the '#'.
3371 // Handle negation, as that still comes through as a separate token.
3372 bool isNegative = false;
3373 if (Parser.getTok().is(AsmToken::Minus)) {
3377 const AsmToken &Tok = Parser.getTok();
3378 if (Tok.is(AsmToken::Real)) {
3379 APFloat RealVal(APFloat::IEEEdouble, Tok.getString());
3380 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
3381 // If we had a '-' in front, toggle the sign bit.
3382 IntVal ^= (uint64_t)isNegative << 63;
3383 int Val = ARM_AM::getFP64Imm(APInt(64, IntVal));
3384 Parser.Lex(); // Eat the token.
3386 TokError("floating point value out of range");
3387 return MatchOperand_ParseFail;
3389 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3390 return MatchOperand_Success;
3392 if (Tok.is(AsmToken::Integer)) {
3393 int64_t Val = Tok.getIntVal();
3394 Parser.Lex(); // Eat the token.
3395 if (Val > 255 || Val < 0) {
3396 TokError("encoded floating point value out of range");
3397 return MatchOperand_ParseFail;
3399 Operands.push_back(ARMOperand::CreateFPImm(Val, S, getContext()));
3400 return MatchOperand_Success;
3403 TokError("invalid floating point immediate");
3404 return MatchOperand_ParseFail;
3406 /// Parse a arm instruction operand. For now this parses the operand regardless
3407 /// of the mnemonic.
3408 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3409 StringRef Mnemonic) {
3412 // Check if the current operand has a custom associated parser, if so, try to
3413 // custom parse the operand, or fallback to the general approach.
3414 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
3415 if (ResTy == MatchOperand_Success)
3417 // If there wasn't a custom match, try the generic matcher below. Otherwise,
3418 // there was a match, but an error occurred, in which case, just return that
3419 // the operand parsing failed.
3420 if (ResTy == MatchOperand_ParseFail)
3423 switch (getLexer().getKind()) {
3425 Error(Parser.getTok().getLoc(), "unexpected token in operand");
3427 case AsmToken::Identifier: {
3428 // If this is VMRS, check for the apsr_nzcv operand.
3429 if (!tryParseRegisterWithWriteBack(Operands))
3431 int Res = tryParseShiftRegister(Operands);
3432 if (Res == 0) // success
3434 else if (Res == -1) // irrecoverable error
3436 if (Mnemonic == "vmrs" && Parser.getTok().getString() == "apsr_nzcv") {
3437 S = Parser.getTok().getLoc();
3439 Operands.push_back(ARMOperand::CreateToken("apsr_nzcv", S));
3443 // Fall though for the Identifier case that is not a register or a
3446 case AsmToken::Integer: // things like 1f and 2b as a branch targets
3447 case AsmToken::Dot: { // . as a branch target
3448 // This was not a register so parse other operands that start with an
3449 // identifier (like labels) as expressions and create them as immediates.
3450 const MCExpr *IdVal;
3451 S = Parser.getTok().getLoc();
3452 if (getParser().ParseExpression(IdVal))
3454 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3455 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
3458 case AsmToken::LBrac:
3459 return parseMemory(Operands);
3460 case AsmToken::LCurly:
3461 return parseRegisterList(Operands);
3462 case AsmToken::Hash: {
3463 // #42 -> immediate.
3464 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
3465 S = Parser.getTok().getLoc();
3467 bool isNegative = Parser.getTok().is(AsmToken::Minus);
3468 const MCExpr *ImmVal;
3469 if (getParser().ParseExpression(ImmVal))
3471 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ImmVal);
3473 Error(S, "constant expression expected");
3474 return MatchOperand_ParseFail;
3476 int32_t Val = CE->getValue();
3477 if (isNegative && Val == 0)
3478 ImmVal = MCConstantExpr::Create(INT32_MIN, getContext());
3479 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3480 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
3483 case AsmToken::Colon: {
3484 // ":lower16:" and ":upper16:" expression prefixes
3485 // FIXME: Check it's an expression prefix,
3486 // e.g. (FOO - :lower16:BAR) isn't legal.
3487 ARMMCExpr::VariantKind RefKind;
3488 if (parsePrefix(RefKind))
3491 const MCExpr *SubExprVal;
3492 if (getParser().ParseExpression(SubExprVal))
3495 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
3497 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
3498 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
3504 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
3505 // :lower16: and :upper16:.
3506 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
3507 RefKind = ARMMCExpr::VK_ARM_None;
3509 // :lower16: and :upper16: modifiers
3510 assert(getLexer().is(AsmToken::Colon) && "expected a :");
3511 Parser.Lex(); // Eat ':'
3513 if (getLexer().isNot(AsmToken::Identifier)) {
3514 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
3518 StringRef IDVal = Parser.getTok().getIdentifier();
3519 if (IDVal == "lower16") {
3520 RefKind = ARMMCExpr::VK_ARM_LO16;
3521 } else if (IDVal == "upper16") {
3522 RefKind = ARMMCExpr::VK_ARM_HI16;
3524 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
3529 if (getLexer().isNot(AsmToken::Colon)) {
3530 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
3533 Parser.Lex(); // Eat the last ':'
3537 /// \brief Given a mnemonic, split out possible predication code and carry
3538 /// setting letters to form a canonical mnemonic and flags.
3540 // FIXME: Would be nice to autogen this.
3541 // FIXME: This is a bit of a maze of special cases.
3542 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
3543 unsigned &PredicationCode,
3545 unsigned &ProcessorIMod,
3546 StringRef &ITMask) {
3547 PredicationCode = ARMCC::AL;
3548 CarrySetting = false;
3551 // Ignore some mnemonics we know aren't predicated forms.
3553 // FIXME: Would be nice to autogen this.
3554 if ((Mnemonic == "movs" && isThumb()) ||
3555 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
3556 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
3557 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
3558 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
3559 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
3560 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
3561 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
3564 // First, split out any predication code. Ignore mnemonics we know aren't
3565 // predicated but do have a carry-set and so weren't caught above.
3566 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
3567 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
3568 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
3569 Mnemonic != "sbcs" && Mnemonic != "rscs") {
3570 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
3571 .Case("eq", ARMCC::EQ)
3572 .Case("ne", ARMCC::NE)
3573 .Case("hs", ARMCC::HS)
3574 .Case("cs", ARMCC::HS)
3575 .Case("lo", ARMCC::LO)
3576 .Case("cc", ARMCC::LO)
3577 .Case("mi", ARMCC::MI)
3578 .Case("pl", ARMCC::PL)
3579 .Case("vs", ARMCC::VS)
3580 .Case("vc", ARMCC::VC)
3581 .Case("hi", ARMCC::HI)
3582 .Case("ls", ARMCC::LS)
3583 .Case("ge", ARMCC::GE)
3584 .Case("lt", ARMCC::LT)
3585 .Case("gt", ARMCC::GT)
3586 .Case("le", ARMCC::LE)
3587 .Case("al", ARMCC::AL)
3590 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
3591 PredicationCode = CC;
3595 // Next, determine if we have a carry setting bit. We explicitly ignore all
3596 // the instructions we know end in 's'.
3597 if (Mnemonic.endswith("s") &&
3598 !(Mnemonic == "cps" || Mnemonic == "mls" ||
3599 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
3600 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
3601 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
3602 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
3603 (Mnemonic == "movs" && isThumb()))) {
3604 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
3605 CarrySetting = true;
3608 // The "cps" instruction can have a interrupt mode operand which is glued into
3609 // the mnemonic. Check if this is the case, split it and parse the imod op
3610 if (Mnemonic.startswith("cps")) {
3611 // Split out any imod code.
3613 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
3614 .Case("ie", ARM_PROC::IE)
3615 .Case("id", ARM_PROC::ID)
3618 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
3619 ProcessorIMod = IMod;
3623 // The "it" instruction has the condition mask on the end of the mnemonic.
3624 if (Mnemonic.startswith("it")) {
3625 ITMask = Mnemonic.slice(2, Mnemonic.size());
3626 Mnemonic = Mnemonic.slice(0, 2);
3632 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
3633 /// inclusion of carry set or predication code operands.
3635 // FIXME: It would be nice to autogen this.
3637 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
3638 bool &CanAcceptPredicationCode) {
3639 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
3640 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
3641 Mnemonic == "add" || Mnemonic == "adc" ||
3642 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
3643 Mnemonic == "orr" || Mnemonic == "mvn" ||
3644 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
3645 Mnemonic == "sbc" || Mnemonic == "eor" || Mnemonic == "neg" ||
3646 (!isThumb() && (Mnemonic == "smull" || Mnemonic == "mov" ||
3647 Mnemonic == "mla" || Mnemonic == "smlal" ||
3648 Mnemonic == "umlal" || Mnemonic == "umull"))) {
3649 CanAcceptCarrySet = true;
3651 CanAcceptCarrySet = false;
3653 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
3654 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
3655 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
3656 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
3657 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "setend" ||
3658 (Mnemonic == "clrex" && !isThumb()) ||
3659 (Mnemonic == "nop" && isThumbOne()) ||
3660 ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw" ||
3661 Mnemonic == "ldc2" || Mnemonic == "ldc2l" ||
3662 Mnemonic == "stc2" || Mnemonic == "stc2l") && !isThumb()) ||
3663 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs")) &&
3665 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumbOne())) {
3666 CanAcceptPredicationCode = false;
3668 CanAcceptPredicationCode = true;
3671 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
3672 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
3673 CanAcceptPredicationCode = false;
3677 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
3678 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3679 // FIXME: This is all horribly hacky. We really need a better way to deal
3680 // with optional operands like this in the matcher table.
3682 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
3683 // another does not. Specifically, the MOVW instruction does not. So we
3684 // special case it here and remove the defaulted (non-setting) cc_out
3685 // operand if that's the instruction we're trying to match.
3687 // We do this as post-processing of the explicit operands rather than just
3688 // conditionally adding the cc_out in the first place because we need
3689 // to check the type of the parsed immediate operand.
3690 if (Mnemonic == "mov" && Operands.size() > 4 && !isThumb() &&
3691 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
3692 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
3693 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3696 // Register-register 'add' for thumb does not have a cc_out operand
3697 // when there are only two register operands.
3698 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
3699 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3700 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3701 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3703 // Register-register 'add' for thumb does not have a cc_out operand
3704 // when it's an ADD Rdm, SP, {Rdm|#imm0_255} instruction. We do
3705 // have to check the immediate range here since Thumb2 has a variant
3706 // that can handle a different range and has a cc_out operand.
3707 if (((isThumb() && Mnemonic == "add") ||
3708 (isThumbTwo() && Mnemonic == "sub")) &&
3709 Operands.size() == 6 &&
3710 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3711 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3712 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
3713 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
3714 (static_cast<ARMOperand*>(Operands[5])->isReg() ||
3715 static_cast<ARMOperand*>(Operands[5])->isImm0_1020s4()))
3717 // For Thumb2, add/sub immediate does not have a cc_out operand for the
3718 // imm0_4095 variant. That's the least-preferred variant when
3719 // selecting via the generic "add" mnemonic, so to know that we
3720 // should remove the cc_out operand, we have to explicitly check that
3721 // it's not one of the other variants. Ugh.
3722 if (isThumbTwo() && (Mnemonic == "add" || Mnemonic == "sub") &&
3723 Operands.size() == 6 &&
3724 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3725 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3726 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3727 // Nest conditions rather than one big 'if' statement for readability.
3729 // If either register is a high reg, it's either one of the SP
3730 // variants (handled above) or a 32-bit encoding, so we just
3731 // check against T3.
3732 if ((!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
3733 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg())) &&
3734 static_cast<ARMOperand*>(Operands[5])->isT2SOImm())
3736 // If both registers are low, we're in an IT block, and the immediate is
3737 // in range, we should use encoding T1 instead, which has a cc_out.
3739 isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) &&
3740 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
3741 static_cast<ARMOperand*>(Operands[5])->isImm0_7())
3744 // Otherwise, we use encoding T4, which does not have a cc_out
3749 // The thumb2 multiply instruction doesn't have a CCOut register, so
3750 // if we have a "mul" mnemonic in Thumb mode, check if we'll be able to
3751 // use the 16-bit encoding or not.
3752 if (isThumbTwo() && Mnemonic == "mul" && Operands.size() == 6 &&
3753 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
3754 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3755 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3756 static_cast<ARMOperand*>(Operands[5])->isReg() &&
3757 // If the registers aren't low regs, the destination reg isn't the
3758 // same as one of the source regs, or the cc_out operand is zero
3759 // outside of an IT block, we have to use the 32-bit encoding, so
3760 // remove the cc_out operand.
3761 (!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
3762 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) ||
3764 (static_cast<ARMOperand*>(Operands[3])->getReg() !=
3765 static_cast<ARMOperand*>(Operands[5])->getReg() &&
3766 static_cast<ARMOperand*>(Operands[3])->getReg() !=
3767 static_cast<ARMOperand*>(Operands[4])->getReg())))
3772 // Register-register 'add/sub' for thumb does not have a cc_out operand
3773 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
3774 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
3775 // right, this will result in better diagnostics (which operand is off)
3777 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
3778 (Operands.size() == 5 || Operands.size() == 6) &&
3779 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3780 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
3781 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3787 /// Parse an arm instruction mnemonic followed by its operands.
3788 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
3789 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3790 // Create the leading tokens for the mnemonic, split by '.' characters.
3791 size_t Start = 0, Next = Name.find('.');
3792 StringRef Mnemonic = Name.slice(Start, Next);
3794 // Split out the predication code and carry setting flag from the mnemonic.
3795 unsigned PredicationCode;
3796 unsigned ProcessorIMod;
3799 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
3800 ProcessorIMod, ITMask);
3802 // In Thumb1, only the branch (B) instruction can be predicated.
3803 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
3804 Parser.EatToEndOfStatement();
3805 return Error(NameLoc, "conditional execution not supported in Thumb1");
3808 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
3810 // Handle the IT instruction ITMask. Convert it to a bitmask. This
3811 // is the mask as it will be for the IT encoding if the conditional
3812 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
3813 // where the conditional bit0 is zero, the instruction post-processing
3814 // will adjust the mask accordingly.
3815 if (Mnemonic == "it") {
3816 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + 2);
3817 if (ITMask.size() > 3) {
3818 Parser.EatToEndOfStatement();
3819 return Error(Loc, "too many conditions on IT instruction");
3822 for (unsigned i = ITMask.size(); i != 0; --i) {
3823 char pos = ITMask[i - 1];
3824 if (pos != 't' && pos != 'e') {
3825 Parser.EatToEndOfStatement();
3826 return Error(Loc, "illegal IT block condition mask '" + ITMask + "'");
3829 if (ITMask[i - 1] == 't')
3832 Operands.push_back(ARMOperand::CreateITMask(Mask, Loc));
3835 // FIXME: This is all a pretty gross hack. We should automatically handle
3836 // optional operands like this via tblgen.
3838 // Next, add the CCOut and ConditionCode operands, if needed.
3840 // For mnemonics which can ever incorporate a carry setting bit or predication
3841 // code, our matching model involves us always generating CCOut and
3842 // ConditionCode operands to match the mnemonic "as written" and then we let
3843 // the matcher deal with finding the right instruction or generating an
3844 // appropriate error.
3845 bool CanAcceptCarrySet, CanAcceptPredicationCode;
3846 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
3848 // If we had a carry-set on an instruction that can't do that, issue an
3850 if (!CanAcceptCarrySet && CarrySetting) {
3851 Parser.EatToEndOfStatement();
3852 return Error(NameLoc, "instruction '" + Mnemonic +
3853 "' can not set flags, but 's' suffix specified");
3855 // If we had a predication code on an instruction that can't do that, issue an
3857 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
3858 Parser.EatToEndOfStatement();
3859 return Error(NameLoc, "instruction '" + Mnemonic +
3860 "' is not predicable, but condition code specified");
3863 // Add the carry setting operand, if necessary.
3864 if (CanAcceptCarrySet) {
3865 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size());
3866 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
3870 // Add the predication code operand, if necessary.
3871 if (CanAcceptPredicationCode) {
3872 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size() +
3874 Operands.push_back(ARMOperand::CreateCondCode(
3875 ARMCC::CondCodes(PredicationCode), Loc));
3878 // Add the processor imod operand, if necessary.
3879 if (ProcessorIMod) {
3880 Operands.push_back(ARMOperand::CreateImm(
3881 MCConstantExpr::Create(ProcessorIMod, getContext()),
3885 // Add the remaining tokens in the mnemonic.
3886 while (Next != StringRef::npos) {
3888 Next = Name.find('.', Start + 1);
3889 StringRef ExtraToken = Name.slice(Start, Next);
3891 // For now, we're only parsing Thumb1 (for the most part), so
3892 // just ignore ".n" qualifiers. We'll use them to restrict
3893 // matching when we do Thumb2.
3894 if (ExtraToken != ".n") {
3895 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Start);
3896 Operands.push_back(ARMOperand::CreateToken(ExtraToken, Loc));
3900 // Read the remaining operands.
3901 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3902 // Read the first operand.
3903 if (parseOperand(Operands, Mnemonic)) {
3904 Parser.EatToEndOfStatement();
3908 while (getLexer().is(AsmToken::Comma)) {
3909 Parser.Lex(); // Eat the comma.
3911 // Parse and remember the operand.
3912 if (parseOperand(Operands, Mnemonic)) {
3913 Parser.EatToEndOfStatement();
3919 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3920 SMLoc Loc = getLexer().getLoc();
3921 Parser.EatToEndOfStatement();
3922 return Error(Loc, "unexpected token in argument list");
3925 Parser.Lex(); // Consume the EndOfStatement
3927 // Some instructions, mostly Thumb, have forms for the same mnemonic that
3928 // do and don't have a cc_out optional-def operand. With some spot-checks
3929 // of the operand list, we can figure out which variant we're trying to
3930 // parse and adjust accordingly before actually matching. We shouldn't ever
3931 // try to remove a cc_out operand that was explicitly set on the the
3932 // mnemonic, of course (CarrySetting == true). Reason number #317 the
3933 // table driven matcher doesn't fit well with the ARM instruction set.
3934 if (!CarrySetting && shouldOmitCCOutOperand(Mnemonic, Operands)) {
3935 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3936 Operands.erase(Operands.begin() + 1);
3940 // ARM mode 'blx' need special handling, as the register operand version
3941 // is predicable, but the label operand version is not. So, we can't rely
3942 // on the Mnemonic based checking to correctly figure out when to put
3943 // a k_CondCode operand in the list. If we're trying to match the label
3944 // version, remove the k_CondCode operand here.
3945 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
3946 static_cast<ARMOperand*>(Operands[2])->isImm()) {
3947 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3948 Operands.erase(Operands.begin() + 1);
3952 // The vector-compare-to-zero instructions have a literal token "#0" at
3953 // the end that comes to here as an immediate operand. Convert it to a
3954 // token to play nicely with the matcher.
3955 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
3956 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
3957 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3958 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3959 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3960 if (CE && CE->getValue() == 0) {
3961 Operands.erase(Operands.begin() + 5);
3962 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3966 // VCMP{E} does the same thing, but with a different operand count.
3967 if ((Mnemonic == "vcmp" || Mnemonic == "vcmpe") && Operands.size() == 5 &&
3968 static_cast<ARMOperand*>(Operands[4])->isImm()) {
3969 ARMOperand *Op = static_cast<ARMOperand*>(Operands[4]);
3970 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3971 if (CE && CE->getValue() == 0) {
3972 Operands.erase(Operands.begin() + 4);
3973 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3977 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
3978 // end. Convert it to a token here.
3979 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
3980 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3981 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3982 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3983 if (CE && CE->getValue() == 0) {
3984 Operands.erase(Operands.begin() + 5);
3985 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3993 // Validate context-sensitive operand constraints.
3995 // return 'true' if register list contains non-low GPR registers,
3996 // 'false' otherwise. If Reg is in the register list or is HiReg, set
3997 // 'containsReg' to true.
3998 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
3999 unsigned HiReg, bool &containsReg) {
4000 containsReg = false;
4001 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4002 unsigned OpReg = Inst.getOperand(i).getReg();
4005 // Anything other than a low register isn't legal here.
4006 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
4012 // Check if the specified regisgter is in the register list of the inst,
4013 // starting at the indicated operand number.
4014 static bool listContainsReg(MCInst &Inst, unsigned OpNo, unsigned Reg) {
4015 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
4016 unsigned OpReg = Inst.getOperand(i).getReg();
4023 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
4024 // the ARMInsts array) instead. Getting that here requires awkward
4025 // API changes, though. Better way?
4027 extern MCInstrDesc ARMInsts[];
4029 static MCInstrDesc &getInstDesc(unsigned Opcode) {
4030 return ARMInsts[Opcode];
4033 // FIXME: We would really like to be able to tablegen'erate this.
4035 validateInstruction(MCInst &Inst,
4036 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4037 MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
4038 SMLoc Loc = Operands[0]->getStartLoc();
4039 // Check the IT block state first.
4040 // NOTE: In Thumb mode, the BKPT instruction has the interesting property of
4041 // being allowed in IT blocks, but not being predicable. It just always
4043 if (inITBlock() && Inst.getOpcode() != ARM::tBKPT) {
4045 if (ITState.FirstCond)
4046 ITState.FirstCond = false;
4048 bit = (ITState.Mask >> (5 - ITState.CurPosition)) & 1;
4049 // The instruction must be predicable.
4050 if (!MCID.isPredicable())
4051 return Error(Loc, "instructions in IT block must be predicable");
4052 unsigned Cond = Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm();
4053 unsigned ITCond = bit ? ITState.Cond :
4054 ARMCC::getOppositeCondition(ITState.Cond);
4055 if (Cond != ITCond) {
4056 // Find the condition code Operand to get its SMLoc information.
4058 for (unsigned i = 1; i < Operands.size(); ++i)
4059 if (static_cast<ARMOperand*>(Operands[i])->isCondCode())
4060 CondLoc = Operands[i]->getStartLoc();
4061 return Error(CondLoc, "incorrect condition in IT block; got '" +
4062 StringRef(ARMCondCodeToString(ARMCC::CondCodes(Cond))) +
4063 "', but expected '" +
4064 ARMCondCodeToString(ARMCC::CondCodes(ITCond)) + "'");
4066 // Check for non-'al' condition codes outside of the IT block.
4067 } else if (isThumbTwo() && MCID.isPredicable() &&
4068 Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm() !=
4069 ARMCC::AL && Inst.getOpcode() != ARM::tB &&
4070 Inst.getOpcode() != ARM::t2B)
4071 return Error(Loc, "predicated instructions must be in IT block");
4073 switch (Inst.getOpcode()) {
4076 case ARM::LDRD_POST:
4078 // Rt2 must be Rt + 1.
4079 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4080 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4082 return Error(Operands[3]->getStartLoc(),
4083 "destination operands must be sequential");
4087 // Rt2 must be Rt + 1.
4088 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
4089 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4091 return Error(Operands[3]->getStartLoc(),
4092 "source operands must be sequential");
4096 case ARM::STRD_POST:
4098 // Rt2 must be Rt + 1.
4099 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
4100 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
4102 return Error(Operands[3]->getStartLoc(),
4103 "source operands must be sequential");
4108 // width must be in range [1, 32-lsb]
4109 unsigned lsb = Inst.getOperand(2).getImm();
4110 unsigned widthm1 = Inst.getOperand(3).getImm();
4111 if (widthm1 >= 32 - lsb)
4112 return Error(Operands[5]->getStartLoc(),
4113 "bitfield width must be in range [1,32-lsb]");
4117 // If we're parsing Thumb2, the .w variant is available and handles
4118 // most cases that are normally illegal for a Thumb1 LDM
4119 // instruction. We'll make the transformation in processInstruction()
4122 // Thumb LDM instructions are writeback iff the base register is not
4123 // in the register list.
4124 unsigned Rn = Inst.getOperand(0).getReg();
4125 bool hasWritebackToken =
4126 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4127 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4128 bool listContainsBase;
4129 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) && !isThumbTwo())
4130 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
4131 "registers must be in range r0-r7");
4132 // If we should have writeback, then there should be a '!' token.
4133 if (!listContainsBase && !hasWritebackToken && !isThumbTwo())
4134 return Error(Operands[2]->getStartLoc(),
4135 "writeback operator '!' expected");
4136 // If we should not have writeback, there must not be a '!'. This is
4137 // true even for the 32-bit wide encodings.
4138 if (listContainsBase && hasWritebackToken)
4139 return Error(Operands[3]->getStartLoc(),
4140 "writeback operator '!' not allowed when base register "
4141 "in register list");
4145 case ARM::t2LDMIA_UPD: {
4146 if (listContainsReg(Inst, 3, Inst.getOperand(0).getReg()))
4147 return Error(Operands[4]->getStartLoc(),
4148 "writeback operator '!' not allowed when base register "
4149 "in register list");
4153 bool listContainsBase;
4154 if (checkLowRegisterList(Inst, 3, 0, ARM::PC, listContainsBase))
4155 return Error(Operands[2]->getStartLoc(),
4156 "registers must be in range r0-r7 or pc");
4160 bool listContainsBase;
4161 if (checkLowRegisterList(Inst, 3, 0, ARM::LR, listContainsBase))
4162 return Error(Operands[2]->getStartLoc(),
4163 "registers must be in range r0-r7 or lr");
4166 case ARM::tSTMIA_UPD: {
4167 bool listContainsBase;
4168 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase) && !isThumbTwo())
4169 return Error(Operands[4]->getStartLoc(),
4170 "registers must be in range r0-r7");
4179 processInstruction(MCInst &Inst,
4180 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
4181 switch (Inst.getOpcode()) {
4182 case ARM::LDMIA_UPD:
4183 // If this is a load of a single register via a 'pop', then we should use
4184 // a post-indexed LDR instruction instead, per the ARM ARM.
4185 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
4186 Inst.getNumOperands() == 5) {
4188 TmpInst.setOpcode(ARM::LDR_POST_IMM);
4189 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4190 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4191 TmpInst.addOperand(Inst.getOperand(1)); // Rn
4192 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
4193 TmpInst.addOperand(MCOperand::CreateImm(4));
4194 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4195 TmpInst.addOperand(Inst.getOperand(3));
4199 case ARM::STMDB_UPD:
4200 // If this is a store of a single register via a 'push', then we should use
4201 // a pre-indexed STR instruction instead, per the ARM ARM.
4202 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
4203 Inst.getNumOperands() == 5) {
4205 TmpInst.setOpcode(ARM::STR_PRE_IMM);
4206 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
4207 TmpInst.addOperand(Inst.getOperand(4)); // Rt
4208 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
4209 TmpInst.addOperand(MCOperand::CreateImm(-4));
4210 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
4211 TmpInst.addOperand(Inst.getOperand(3));
4216 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4217 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4218 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4219 // to encoding T1 if <Rd> is omitted."
4220 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6)
4221 Inst.setOpcode(ARM::tADDi3);
4224 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
4225 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
4226 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
4227 // to encoding T1 if <Rd> is omitted."
4228 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6)
4229 Inst.setOpcode(ARM::tSUBi3);
4232 // A Thumb conditional branch outside of an IT block is a tBcc.
4233 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock())
4234 Inst.setOpcode(ARM::tBcc);
4237 // A Thumb2 conditional branch outside of an IT block is a t2Bcc.
4238 if (Inst.getOperand(1).getImm() != ARMCC::AL && !inITBlock())
4239 Inst.setOpcode(ARM::t2Bcc);
4242 // If the conditional is AL or we're in an IT block, we really want t2B.
4243 if (Inst.getOperand(1).getImm() == ARMCC::AL || inITBlock())
4244 Inst.setOpcode(ARM::t2B);
4247 // If the conditional is AL, we really want tB.
4248 if (Inst.getOperand(1).getImm() == ARMCC::AL)
4249 Inst.setOpcode(ARM::tB);
4252 // If the register list contains any high registers, or if the writeback
4253 // doesn't match what tLDMIA can do, we need to use the 32-bit encoding
4254 // instead if we're in Thumb2. Otherwise, this should have generated
4255 // an error in validateInstruction().
4256 unsigned Rn = Inst.getOperand(0).getReg();
4257 bool hasWritebackToken =
4258 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
4259 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
4260 bool listContainsBase;
4261 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) ||
4262 (!listContainsBase && !hasWritebackToken) ||
4263 (listContainsBase && hasWritebackToken)) {
4264 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4265 assert (isThumbTwo());
4266 Inst.setOpcode(hasWritebackToken ? ARM::t2LDMIA_UPD : ARM::t2LDMIA);
4267 // If we're switching to the updating version, we need to insert
4268 // the writeback tied operand.
4269 if (hasWritebackToken)
4270 Inst.insert(Inst.begin(),
4271 MCOperand::CreateReg(Inst.getOperand(0).getReg()));
4275 case ARM::tSTMIA_UPD: {
4276 // If the register list contains any high registers, we need to use
4277 // the 32-bit encoding instead if we're in Thumb2. Otherwise, this
4278 // should have generated an error in validateInstruction().
4279 unsigned Rn = Inst.getOperand(0).getReg();
4280 bool listContainsBase;
4281 if (checkLowRegisterList(Inst, 4, Rn, 0, listContainsBase)) {
4282 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
4283 assert (isThumbTwo());
4284 Inst.setOpcode(ARM::t2STMIA_UPD);
4289 // If we can use the 16-bit encoding and the user didn't explicitly
4290 // request the 32-bit variant, transform it here.
4291 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4292 Inst.getOperand(1).getImm() <= 255 &&
4293 ((!inITBlock() && Inst.getOperand(2).getImm() == ARMCC::AL &&
4294 Inst.getOperand(4).getReg() == ARM::CPSR) ||
4295 (inITBlock() && Inst.getOperand(4).getReg() == 0)) &&
4296 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4297 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4298 // The operands aren't in the same order for tMOVi8...
4300 TmpInst.setOpcode(ARM::tMOVi8);
4301 TmpInst.addOperand(Inst.getOperand(0));
4302 TmpInst.addOperand(Inst.getOperand(4));
4303 TmpInst.addOperand(Inst.getOperand(1));
4304 TmpInst.addOperand(Inst.getOperand(2));
4305 TmpInst.addOperand(Inst.getOperand(3));
4311 // If we can use the 16-bit encoding and the user didn't explicitly
4312 // request the 32-bit variant, transform it here.
4313 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4314 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4315 Inst.getOperand(2).getImm() == ARMCC::AL &&
4316 Inst.getOperand(4).getReg() == ARM::CPSR &&
4317 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4318 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4319 // The operands aren't the same for tMOV[S]r... (no cc_out)
4321 TmpInst.setOpcode(Inst.getOperand(4).getReg() ? ARM::tMOVSr : ARM::tMOVr);
4322 TmpInst.addOperand(Inst.getOperand(0));
4323 TmpInst.addOperand(Inst.getOperand(1));
4324 TmpInst.addOperand(Inst.getOperand(2));
4325 TmpInst.addOperand(Inst.getOperand(3));
4334 // If we can use the 16-bit encoding and the user didn't explicitly
4335 // request the 32-bit variant, transform it here.
4336 if (isARMLowRegister(Inst.getOperand(0).getReg()) &&
4337 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4338 Inst.getOperand(2).getImm() == 0 &&
4339 (!static_cast<ARMOperand*>(Operands[2])->isToken() ||
4340 static_cast<ARMOperand*>(Operands[2])->getToken() != ".w")) {
4342 switch (Inst.getOpcode()) {
4343 default: llvm_unreachable("Illegal opcode!");
4344 case ARM::t2SXTH: NewOpc = ARM::tSXTH; break;
4345 case ARM::t2SXTB: NewOpc = ARM::tSXTB; break;
4346 case ARM::t2UXTH: NewOpc = ARM::tUXTH; break;
4347 case ARM::t2UXTB: NewOpc = ARM::tUXTB; break;
4349 // The operands aren't the same for thumb1 (no rotate operand).
4351 TmpInst.setOpcode(NewOpc);
4352 TmpInst.addOperand(Inst.getOperand(0));
4353 TmpInst.addOperand(Inst.getOperand(1));
4354 TmpInst.addOperand(Inst.getOperand(3));
4355 TmpInst.addOperand(Inst.getOperand(4));
4361 // The mask bits for all but the first condition are represented as
4362 // the low bit of the condition code value implies 't'. We currently
4363 // always have 1 implies 't', so XOR toggle the bits if the low bit
4364 // of the condition code is zero. The encoding also expects the low
4365 // bit of the condition to be encoded as bit 4 of the mask operand,
4366 // so mask that in if needed
4367 MCOperand &MO = Inst.getOperand(1);
4368 unsigned Mask = MO.getImm();
4369 unsigned OrigMask = Mask;
4370 unsigned TZ = CountTrailingZeros_32(Mask);
4371 if ((Inst.getOperand(0).getImm() & 1) == 0) {
4372 assert(Mask && TZ <= 3 && "illegal IT mask value!");
4373 for (unsigned i = 3; i != TZ; --i)
4379 // Set up the IT block state according to the IT instruction we just
4381 assert(!inITBlock() && "nested IT blocks?!");
4382 ITState.Cond = ARMCC::CondCodes(Inst.getOperand(0).getImm());
4383 ITState.Mask = OrigMask; // Use the original mask, not the updated one.
4384 ITState.CurPosition = 0;
4385 ITState.FirstCond = true;
4391 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
4392 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
4393 // suffix depending on whether they're in an IT block or not.
4394 unsigned Opc = Inst.getOpcode();
4395 MCInstrDesc &MCID = getInstDesc(Opc);
4396 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
4397 assert(MCID.hasOptionalDef() &&
4398 "optionally flag setting instruction missing optional def operand");
4399 assert(MCID.NumOperands == Inst.getNumOperands() &&
4400 "operand count mismatch!");
4401 // Find the optional-def operand (cc_out).
4404 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
4407 // If we're parsing Thumb1, reject it completely.
4408 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
4409 return Match_MnemonicFail;
4410 // If we're parsing Thumb2, which form is legal depends on whether we're
4412 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR &&
4414 return Match_RequiresITBlock;
4415 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() == ARM::CPSR &&
4417 return Match_RequiresNotITBlock;
4419 // Some high-register supporting Thumb1 encodings only allow both registers
4420 // to be from r0-r7 when in Thumb2.
4421 else if (Opc == ARM::tADDhirr && isThumbOne() &&
4422 isARMLowRegister(Inst.getOperand(1).getReg()) &&
4423 isARMLowRegister(Inst.getOperand(2).getReg()))
4424 return Match_RequiresThumb2;
4425 // Others only require ARMv6 or later.
4426 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
4427 isARMLowRegister(Inst.getOperand(0).getReg()) &&
4428 isARMLowRegister(Inst.getOperand(1).getReg()))
4429 return Match_RequiresV6;
4430 return Match_Success;
4434 MatchAndEmitInstruction(SMLoc IDLoc,
4435 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
4439 unsigned MatchResult;
4440 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
4441 switch (MatchResult) {
4444 // Context sensitive operand constraints aren't handled by the matcher,
4445 // so check them here.
4446 if (validateInstruction(Inst, Operands)) {
4447 // Still progress the IT block, otherwise one wrong condition causes
4448 // nasty cascading errors.
4449 forwardITPosition();
4453 // Some instructions need post-processing to, for example, tweak which
4454 // encoding is selected.
4455 processInstruction(Inst, Operands);
4457 // Only move forward at the very end so that everything in validate
4458 // and process gets a consistent answer about whether we're in an IT
4460 forwardITPosition();
4462 Out.EmitInstruction(Inst);
4464 case Match_MissingFeature:
4465 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
4467 case Match_InvalidOperand: {
4468 SMLoc ErrorLoc = IDLoc;
4469 if (ErrorInfo != ~0U) {
4470 if (ErrorInfo >= Operands.size())
4471 return Error(IDLoc, "too few operands for instruction");
4473 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
4474 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
4477 return Error(ErrorLoc, "invalid operand for instruction");
4479 case Match_MnemonicFail:
4480 return Error(IDLoc, "invalid instruction");
4481 case Match_ConversionFail:
4482 // The converter function will have already emited a diagnostic.
4484 case Match_RequiresNotITBlock:
4485 return Error(IDLoc, "flag setting instruction only valid outside IT block");
4486 case Match_RequiresITBlock:
4487 return Error(IDLoc, "instruction only valid inside IT block");
4488 case Match_RequiresV6:
4489 return Error(IDLoc, "instruction variant requires ARMv6 or later");
4490 case Match_RequiresThumb2:
4491 return Error(IDLoc, "instruction variant requires Thumb2");
4494 llvm_unreachable("Implement any new match types added!");
4498 /// parseDirective parses the arm specific directives
4499 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
4500 StringRef IDVal = DirectiveID.getIdentifier();
4501 if (IDVal == ".word")
4502 return parseDirectiveWord(4, DirectiveID.getLoc());
4503 else if (IDVal == ".thumb")
4504 return parseDirectiveThumb(DirectiveID.getLoc());
4505 else if (IDVal == ".thumb_func")
4506 return parseDirectiveThumbFunc(DirectiveID.getLoc());
4507 else if (IDVal == ".code")
4508 return parseDirectiveCode(DirectiveID.getLoc());
4509 else if (IDVal == ".syntax")
4510 return parseDirectiveSyntax(DirectiveID.getLoc());
4514 /// parseDirectiveWord
4515 /// ::= .word [ expression (, expression)* ]
4516 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
4517 if (getLexer().isNot(AsmToken::EndOfStatement)) {
4519 const MCExpr *Value;
4520 if (getParser().ParseExpression(Value))
4523 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
4525 if (getLexer().is(AsmToken::EndOfStatement))
4528 // FIXME: Improve diagnostic.
4529 if (getLexer().isNot(AsmToken::Comma))
4530 return Error(L, "unexpected token in directive");
4539 /// parseDirectiveThumb
4541 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
4542 if (getLexer().isNot(AsmToken::EndOfStatement))
4543 return Error(L, "unexpected token in directive");
4546 // TODO: set thumb mode
4547 // TODO: tell the MC streamer the mode
4548 // getParser().getStreamer().Emit???();
4552 /// parseDirectiveThumbFunc
4553 /// ::= .thumbfunc symbol_name
4554 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
4555 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
4556 bool isMachO = MAI.hasSubsectionsViaSymbols();
4559 // Darwin asm has function name after .thumb_func direction
4562 const AsmToken &Tok = Parser.getTok();
4563 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
4564 return Error(L, "unexpected token in .thumb_func directive");
4565 Name = Tok.getString();
4566 Parser.Lex(); // Consume the identifier token.
4569 if (getLexer().isNot(AsmToken::EndOfStatement))
4570 return Error(L, "unexpected token in directive");
4573 // FIXME: assuming function name will be the line following .thumb_func
4575 Name = Parser.getTok().getString();
4578 // Mark symbol as a thumb symbol.
4579 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
4580 getParser().getStreamer().EmitThumbFunc(Func);
4584 /// parseDirectiveSyntax
4585 /// ::= .syntax unified | divided
4586 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
4587 const AsmToken &Tok = Parser.getTok();
4588 if (Tok.isNot(AsmToken::Identifier))
4589 return Error(L, "unexpected token in .syntax directive");
4590 StringRef Mode = Tok.getString();
4591 if (Mode == "unified" || Mode == "UNIFIED")
4593 else if (Mode == "divided" || Mode == "DIVIDED")
4594 return Error(L, "'.syntax divided' arm asssembly not supported");
4596 return Error(L, "unrecognized syntax mode in .syntax directive");
4598 if (getLexer().isNot(AsmToken::EndOfStatement))
4599 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
4602 // TODO tell the MC streamer the mode
4603 // getParser().getStreamer().Emit???();
4607 /// parseDirectiveCode
4608 /// ::= .code 16 | 32
4609 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
4610 const AsmToken &Tok = Parser.getTok();
4611 if (Tok.isNot(AsmToken::Integer))
4612 return Error(L, "unexpected token in .code directive");
4613 int64_t Val = Parser.getTok().getIntVal();
4619 return Error(L, "invalid operand to .code directive");
4621 if (getLexer().isNot(AsmToken::EndOfStatement))
4622 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
4628 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
4632 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
4638 extern "C" void LLVMInitializeARMAsmLexer();
4640 /// Force static initialization.
4641 extern "C" void LLVMInitializeARMAsmParser() {
4642 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
4643 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
4644 LLVMInitializeARMAsmLexer();
4647 #define GET_REGISTER_MATCHER
4648 #define GET_MATCHER_IMPLEMENTATION
4649 #include "ARMGenAsmMatcher.inc"