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 const MCExpr *applyPrefixToExpr(const MCExpr *E,
91 MCSymbolRefExpr::VariantKind Variant);
94 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
95 unsigned &ShiftAmount);
96 bool parseDirectiveWord(unsigned Size, SMLoc L);
97 bool parseDirectiveThumb(SMLoc L);
98 bool parseDirectiveThumbFunc(SMLoc L);
99 bool parseDirectiveCode(SMLoc L);
100 bool parseDirectiveSyntax(SMLoc L);
102 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
103 bool &CarrySetting, unsigned &ProcessorIMod,
105 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
106 bool &CanAcceptPredicationCode);
108 bool isThumb() const {
109 // FIXME: Can tablegen auto-generate this?
110 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
112 bool isThumbOne() const {
113 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
115 bool isThumbTwo() const {
116 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2);
118 bool hasV6Ops() const {
119 return STI.getFeatureBits() & ARM::HasV6Ops;
122 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
123 setAvailableFeatures(FB);
126 /// @name Auto-generated Match Functions
129 #define GET_ASSEMBLER_HEADER
130 #include "ARMGenAsmMatcher.inc"
134 OperandMatchResultTy parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*>&);
135 OperandMatchResultTy parseCoprocNumOperand(
136 SmallVectorImpl<MCParsedAsmOperand*>&);
137 OperandMatchResultTy parseCoprocRegOperand(
138 SmallVectorImpl<MCParsedAsmOperand*>&);
139 OperandMatchResultTy parseMemBarrierOptOperand(
140 SmallVectorImpl<MCParsedAsmOperand*>&);
141 OperandMatchResultTy parseProcIFlagsOperand(
142 SmallVectorImpl<MCParsedAsmOperand*>&);
143 OperandMatchResultTy parseMSRMaskOperand(
144 SmallVectorImpl<MCParsedAsmOperand*>&);
145 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
146 StringRef Op, int Low, int High);
147 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
148 return parsePKHImm(O, "lsl", 0, 31);
150 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
151 return parsePKHImm(O, "asr", 1, 32);
153 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
154 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
155 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
156 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
157 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
158 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
160 // Asm Match Converter Methods
161 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
162 const SmallVectorImpl<MCParsedAsmOperand*> &);
163 bool cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
164 const SmallVectorImpl<MCParsedAsmOperand*> &);
165 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
166 const SmallVectorImpl<MCParsedAsmOperand*> &);
167 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
168 const SmallVectorImpl<MCParsedAsmOperand*> &);
169 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
170 const SmallVectorImpl<MCParsedAsmOperand*> &);
171 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
172 const SmallVectorImpl<MCParsedAsmOperand*> &);
173 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
174 const SmallVectorImpl<MCParsedAsmOperand*> &);
175 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
176 const SmallVectorImpl<MCParsedAsmOperand*> &);
177 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
178 const SmallVectorImpl<MCParsedAsmOperand*> &);
179 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
180 const SmallVectorImpl<MCParsedAsmOperand*> &);
181 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
182 const SmallVectorImpl<MCParsedAsmOperand*> &);
183 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
184 const SmallVectorImpl<MCParsedAsmOperand*> &);
185 bool cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
186 const SmallVectorImpl<MCParsedAsmOperand*> &);
188 bool validateInstruction(MCInst &Inst,
189 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
190 void processInstruction(MCInst &Inst,
191 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
192 bool shouldOmitCCOutOperand(StringRef Mnemonic,
193 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
196 enum ARMMatchResultTy {
197 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
198 Match_RequiresNotITBlock,
203 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
204 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
205 MCAsmParserExtension::Initialize(_Parser);
207 // Initialize the set of available features.
208 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
210 // Not in an ITBlock to start with.
211 ITState.CurPosition = ~0U;
214 // Implementation of the MCTargetAsmParser interface:
215 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
216 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
217 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
218 bool ParseDirective(AsmToken DirectiveID);
220 unsigned checkTargetMatchPredicate(MCInst &Inst);
222 bool MatchAndEmitInstruction(SMLoc IDLoc,
223 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
226 } // end anonymous namespace
230 /// ARMOperand - Instances of this class represent a parsed ARM machine
232 class ARMOperand : public MCParsedAsmOperand {
257 SMLoc StartLoc, EndLoc;
258 SmallVector<unsigned, 8> Registers;
262 ARMCC::CondCodes Val;
278 ARM_PROC::IFlags Val;
298 /// Combined record for all forms of ARM address expressions.
301 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
303 const MCConstantExpr *OffsetImm; // Offset immediate value
304 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
305 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
306 unsigned ShiftImm; // shift for OffsetReg.
307 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
313 ARM_AM::ShiftOpc ShiftTy;
322 ARM_AM::ShiftOpc ShiftTy;
328 ARM_AM::ShiftOpc ShiftTy;
341 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
343 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
345 StartLoc = o.StartLoc;
362 case DPRRegisterList:
363 case SPRRegisterList:
364 Registers = o.Registers;
379 case PostIndexRegister:
380 PostIdxReg = o.PostIdxReg;
388 case ShifterImmediate:
389 ShifterImm = o.ShifterImm;
391 case ShiftedRegister:
392 RegShiftedReg = o.RegShiftedReg;
394 case ShiftedImmediate:
395 RegShiftedImm = o.RegShiftedImm;
397 case RotateImmediate:
400 case BitfieldDescriptor:
401 Bitfield = o.Bitfield;
406 /// getStartLoc - Get the location of the first token of this operand.
407 SMLoc getStartLoc() const { return StartLoc; }
408 /// getEndLoc - Get the location of the last token of this operand.
409 SMLoc getEndLoc() const { return EndLoc; }
411 ARMCC::CondCodes getCondCode() const {
412 assert(Kind == CondCode && "Invalid access!");
416 unsigned getCoproc() const {
417 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
421 StringRef getToken() const {
422 assert(Kind == Token && "Invalid access!");
423 return StringRef(Tok.Data, Tok.Length);
426 unsigned getReg() const {
427 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
431 const SmallVectorImpl<unsigned> &getRegList() const {
432 assert((Kind == RegisterList || Kind == DPRRegisterList ||
433 Kind == SPRRegisterList) && "Invalid access!");
437 const MCExpr *getImm() const {
438 assert(Kind == Immediate && "Invalid access!");
442 ARM_MB::MemBOpt getMemBarrierOpt() const {
443 assert(Kind == MemBarrierOpt && "Invalid access!");
447 ARM_PROC::IFlags getProcIFlags() const {
448 assert(Kind == ProcIFlags && "Invalid access!");
452 unsigned getMSRMask() const {
453 assert(Kind == MSRMask && "Invalid access!");
457 bool isCoprocNum() const { return Kind == CoprocNum; }
458 bool isCoprocReg() const { return Kind == CoprocReg; }
459 bool isCondCode() const { return Kind == CondCode; }
460 bool isCCOut() const { return Kind == CCOut; }
461 bool isITMask() const { return Kind == ITCondMask; }
462 bool isITCondCode() const { return Kind == CondCode; }
463 bool isImm() const { return Kind == Immediate; }
464 bool isImm0_1020s4() const {
465 if (Kind != Immediate)
467 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
468 if (!CE) return false;
469 int64_t Value = CE->getValue();
470 return ((Value & 3) == 0) && Value >= 0 && Value <= 1020;
472 bool isImm0_508s4() const {
473 if (Kind != Immediate)
475 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
476 if (!CE) return false;
477 int64_t Value = CE->getValue();
478 return ((Value & 3) == 0) && Value >= 0 && Value <= 508;
480 bool isImm0_255() const {
481 if (Kind != Immediate)
483 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
484 if (!CE) return false;
485 int64_t Value = CE->getValue();
486 return Value >= 0 && Value < 256;
488 bool isImm0_7() const {
489 if (Kind != Immediate)
491 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
492 if (!CE) return false;
493 int64_t Value = CE->getValue();
494 return Value >= 0 && Value < 8;
496 bool isImm0_15() const {
497 if (Kind != Immediate)
499 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
500 if (!CE) return false;
501 int64_t Value = CE->getValue();
502 return Value >= 0 && Value < 16;
504 bool isImm0_31() const {
505 if (Kind != Immediate)
507 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
508 if (!CE) return false;
509 int64_t Value = CE->getValue();
510 return Value >= 0 && Value < 32;
512 bool isImm1_16() const {
513 if (Kind != Immediate)
515 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
516 if (!CE) return false;
517 int64_t Value = CE->getValue();
518 return Value > 0 && Value < 17;
520 bool isImm1_32() const {
521 if (Kind != Immediate)
523 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
524 if (!CE) return false;
525 int64_t Value = CE->getValue();
526 return Value > 0 && Value < 33;
528 bool isImm0_65535() const {
529 if (Kind != Immediate)
531 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
532 if (!CE) return false;
533 int64_t Value = CE->getValue();
534 return Value >= 0 && Value < 65536;
536 bool isImm0_65535Expr() const {
537 if (Kind != Immediate)
539 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
540 // If it's not a constant expression, it'll generate a fixup and be
542 if (!CE) return true;
543 int64_t Value = CE->getValue();
544 return Value >= 0 && Value < 65536;
546 bool isImm24bit() const {
547 if (Kind != Immediate)
549 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
550 if (!CE) return false;
551 int64_t Value = CE->getValue();
552 return Value >= 0 && Value <= 0xffffff;
554 bool isImmThumbSR() const {
555 if (Kind != Immediate)
557 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
558 if (!CE) return false;
559 int64_t Value = CE->getValue();
560 return Value > 0 && Value < 33;
562 bool isPKHLSLImm() const {
563 if (Kind != Immediate)
565 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
566 if (!CE) return false;
567 int64_t Value = CE->getValue();
568 return Value >= 0 && Value < 32;
570 bool isPKHASRImm() const {
571 if (Kind != Immediate)
573 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
574 if (!CE) return false;
575 int64_t Value = CE->getValue();
576 return Value > 0 && Value <= 32;
578 bool isARMSOImm() const {
579 if (Kind != Immediate)
581 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
582 if (!CE) return false;
583 int64_t Value = CE->getValue();
584 return ARM_AM::getSOImmVal(Value) != -1;
586 bool isT2SOImm() const {
587 if (Kind != Immediate)
589 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
590 if (!CE) return false;
591 int64_t Value = CE->getValue();
592 return ARM_AM::getT2SOImmVal(Value) != -1;
594 bool isSetEndImm() const {
595 if (Kind != Immediate)
597 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
598 if (!CE) return false;
599 int64_t Value = CE->getValue();
600 return Value == 1 || Value == 0;
602 bool isReg() const { return Kind == Register; }
603 bool isRegList() const { return Kind == RegisterList; }
604 bool isDPRRegList() const { return Kind == DPRRegisterList; }
605 bool isSPRRegList() const { return Kind == SPRRegisterList; }
606 bool isToken() const { return Kind == Token; }
607 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
608 bool isMemory() const { return Kind == Memory; }
609 bool isShifterImm() const { return Kind == ShifterImmediate; }
610 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
611 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
612 bool isRotImm() const { return Kind == RotateImmediate; }
613 bool isBitfield() const { return Kind == BitfieldDescriptor; }
614 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
615 bool isPostIdxReg() const {
616 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
618 bool isMemNoOffset() const {
621 // No offset of any kind.
622 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
624 bool isAddrMode2() const {
627 // Check for register offset.
628 if (Mem.OffsetRegNum) return true;
629 // Immediate offset in range [-4095, 4095].
630 if (!Mem.OffsetImm) return true;
631 int64_t Val = Mem.OffsetImm->getValue();
632 return Val > -4096 && Val < 4096;
634 bool isAM2OffsetImm() const {
635 if (Kind != Immediate)
637 // Immediate offset in range [-4095, 4095].
638 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
639 if (!CE) return false;
640 int64_t Val = CE->getValue();
641 return Val > -4096 && Val < 4096;
643 bool isAddrMode3() const {
646 // No shifts are legal for AM3.
647 if (Mem.ShiftType != ARM_AM::no_shift) return false;
648 // Check for register offset.
649 if (Mem.OffsetRegNum) return true;
650 // Immediate offset in range [-255, 255].
651 if (!Mem.OffsetImm) return true;
652 int64_t Val = Mem.OffsetImm->getValue();
653 return Val > -256 && Val < 256;
655 bool isAM3Offset() const {
656 if (Kind != Immediate && Kind != PostIndexRegister)
658 if (Kind == PostIndexRegister)
659 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
660 // Immediate offset in range [-255, 255].
661 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
662 if (!CE) return false;
663 int64_t Val = CE->getValue();
664 // Special case, #-0 is INT32_MIN.
665 return (Val > -256 && Val < 256) || Val == INT32_MIN;
667 bool isAddrMode5() const {
670 // Check for register offset.
671 if (Mem.OffsetRegNum) return false;
672 // Immediate offset in range [-1020, 1020] and a multiple of 4.
673 if (!Mem.OffsetImm) return true;
674 int64_t Val = Mem.OffsetImm->getValue();
675 return (Val >= -1020 && Val <= 1020 && ((Val & 3) == 0)) ||
678 bool isMemRegOffset() const {
679 if (Kind != Memory || !Mem.OffsetRegNum)
683 bool isT2MemRegOffset() const {
684 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative)
686 // Only lsl #{0, 1, 2, 3} allowed.
687 if (Mem.ShiftType == ARM_AM::no_shift)
689 if (Mem.ShiftType != ARM_AM::lsl || Mem.ShiftImm > 3)
693 bool isMemThumbRR() const {
694 // Thumb reg+reg addressing is simple. Just two registers, a base and
695 // an offset. No shifts, negations or any other complicating factors.
696 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
697 Mem.ShiftType != ARM_AM::no_shift)
699 return isARMLowRegister(Mem.BaseRegNum) &&
700 (!Mem.OffsetRegNum || isARMLowRegister(Mem.OffsetRegNum));
702 bool isMemThumbRIs4() const {
703 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
704 !isARMLowRegister(Mem.BaseRegNum))
706 // Immediate offset, multiple of 4 in range [0, 124].
707 if (!Mem.OffsetImm) return true;
708 int64_t Val = Mem.OffsetImm->getValue();
709 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
711 bool isMemThumbRIs2() const {
712 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
713 !isARMLowRegister(Mem.BaseRegNum))
715 // Immediate offset, multiple of 4 in range [0, 62].
716 if (!Mem.OffsetImm) return true;
717 int64_t Val = Mem.OffsetImm->getValue();
718 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
720 bool isMemThumbRIs1() const {
721 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
722 !isARMLowRegister(Mem.BaseRegNum))
724 // Immediate offset in range [0, 31].
725 if (!Mem.OffsetImm) return true;
726 int64_t Val = Mem.OffsetImm->getValue();
727 return Val >= 0 && Val <= 31;
729 bool isMemThumbSPI() const {
730 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
732 // Immediate offset, multiple of 4 in range [0, 1020].
733 if (!Mem.OffsetImm) return true;
734 int64_t Val = Mem.OffsetImm->getValue();
735 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
737 bool isMemImm8Offset() const {
738 if (Kind != Memory || Mem.OffsetRegNum != 0)
740 // Immediate offset in range [-255, 255].
741 if (!Mem.OffsetImm) return true;
742 int64_t Val = Mem.OffsetImm->getValue();
743 return Val > -256 && Val < 256;
745 bool isMemPosImm8Offset() const {
746 if (Kind != Memory || Mem.OffsetRegNum != 0)
748 // Immediate offset in range [0, 255].
749 if (!Mem.OffsetImm) return true;
750 int64_t Val = Mem.OffsetImm->getValue();
751 return Val >= 0 && Val < 256;
753 bool isMemNegImm8Offset() const {
754 if (Kind != Memory || Mem.OffsetRegNum != 0)
756 // Immediate offset in range [-255, -1].
757 if (!Mem.OffsetImm) return true;
758 int64_t Val = Mem.OffsetImm->getValue();
759 return Val > -256 && Val < 0;
761 bool isMemUImm12Offset() const {
762 // If we have an immediate that's not a constant, treat it as a label
763 // reference needing a fixup. If it is a constant, it's something else
765 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
768 if (Kind != Memory || Mem.OffsetRegNum != 0)
770 // Immediate offset in range [0, 4095].
771 if (!Mem.OffsetImm) return true;
772 int64_t Val = Mem.OffsetImm->getValue();
773 return (Val >= 0 && Val < 4096);
775 bool isMemImm12Offset() const {
776 // If we have an immediate that's not a constant, treat it as a label
777 // reference needing a fixup. If it is a constant, it's something else
779 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
782 if (Kind != Memory || Mem.OffsetRegNum != 0)
784 // Immediate offset in range [-4095, 4095].
785 if (!Mem.OffsetImm) return true;
786 int64_t Val = Mem.OffsetImm->getValue();
787 return (Val > -4096 && Val < 4096) || (Val == INT32_MIN);
789 bool isPostIdxImm8() const {
790 if (Kind != Immediate)
792 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
793 if (!CE) return false;
794 int64_t Val = CE->getValue();
795 return (Val > -256 && Val < 256) || (Val == INT32_MIN);
798 bool isMSRMask() const { return Kind == MSRMask; }
799 bool isProcIFlags() const { return Kind == ProcIFlags; }
801 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
802 // Add as immediates when possible. Null MCExpr = 0.
804 Inst.addOperand(MCOperand::CreateImm(0));
805 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
806 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
808 Inst.addOperand(MCOperand::CreateExpr(Expr));
811 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
812 assert(N == 2 && "Invalid number of operands!");
813 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
814 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
815 Inst.addOperand(MCOperand::CreateReg(RegNum));
818 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
819 assert(N == 1 && "Invalid number of operands!");
820 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
823 void addITMaskOperands(MCInst &Inst, unsigned N) const {
824 assert(N == 1 && "Invalid number of operands!");
825 Inst.addOperand(MCOperand::CreateImm(ITMask.Mask));
828 void addITCondCodeOperands(MCInst &Inst, unsigned N) const {
829 assert(N == 1 && "Invalid number of operands!");
830 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
833 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
834 assert(N == 1 && "Invalid number of operands!");
835 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
838 void addCCOutOperands(MCInst &Inst, unsigned N) const {
839 assert(N == 1 && "Invalid number of operands!");
840 Inst.addOperand(MCOperand::CreateReg(getReg()));
843 void addRegOperands(MCInst &Inst, unsigned N) const {
844 assert(N == 1 && "Invalid number of operands!");
845 Inst.addOperand(MCOperand::CreateReg(getReg()));
848 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
849 assert(N == 3 && "Invalid number of operands!");
850 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
851 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
852 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
853 Inst.addOperand(MCOperand::CreateImm(
854 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
857 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
858 assert(N == 2 && "Invalid number of operands!");
859 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
860 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
861 Inst.addOperand(MCOperand::CreateImm(
862 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
865 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
866 assert(N == 1 && "Invalid number of operands!");
867 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
871 void addRegListOperands(MCInst &Inst, unsigned N) const {
872 assert(N == 1 && "Invalid number of operands!");
873 const SmallVectorImpl<unsigned> &RegList = getRegList();
874 for (SmallVectorImpl<unsigned>::const_iterator
875 I = RegList.begin(), E = RegList.end(); I != E; ++I)
876 Inst.addOperand(MCOperand::CreateReg(*I));
879 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
880 addRegListOperands(Inst, N);
883 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
884 addRegListOperands(Inst, N);
887 void addRotImmOperands(MCInst &Inst, unsigned N) const {
888 assert(N == 1 && "Invalid number of operands!");
889 // Encoded as val>>3. The printer handles display as 8, 16, 24.
890 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
893 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
894 assert(N == 1 && "Invalid number of operands!");
895 // Munge the lsb/width into a bitfield mask.
896 unsigned lsb = Bitfield.LSB;
897 unsigned width = Bitfield.Width;
898 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
899 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
900 (32 - (lsb + width)));
901 Inst.addOperand(MCOperand::CreateImm(Mask));
904 void addImmOperands(MCInst &Inst, unsigned N) const {
905 assert(N == 1 && "Invalid number of operands!");
906 addExpr(Inst, getImm());
909 void addImm0_1020s4Operands(MCInst &Inst, unsigned N) const {
910 assert(N == 1 && "Invalid number of operands!");
911 // The immediate is scaled by four in the encoding and is stored
912 // in the MCInst as such. Lop off the low two bits here.
913 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
914 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
917 void addImm0_508s4Operands(MCInst &Inst, unsigned N) const {
918 assert(N == 1 && "Invalid number of operands!");
919 // The immediate is scaled by four in the encoding and is stored
920 // in the MCInst as such. Lop off the low two bits here.
921 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
922 Inst.addOperand(MCOperand::CreateImm(CE->getValue() / 4));
925 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
926 assert(N == 1 && "Invalid number of operands!");
927 addExpr(Inst, getImm());
930 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
931 assert(N == 1 && "Invalid number of operands!");
932 addExpr(Inst, getImm());
935 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
936 assert(N == 1 && "Invalid number of operands!");
937 addExpr(Inst, getImm());
940 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
941 assert(N == 1 && "Invalid number of operands!");
942 addExpr(Inst, getImm());
945 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
946 assert(N == 1 && "Invalid number of operands!");
947 // The constant encodes as the immediate-1, and we store in the instruction
948 // the bits as encoded, so subtract off one here.
949 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
950 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
953 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
954 assert(N == 1 && "Invalid number of operands!");
955 // The constant encodes as the immediate-1, and we store in the instruction
956 // the bits as encoded, so subtract off one here.
957 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
958 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
961 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
962 assert(N == 1 && "Invalid number of operands!");
963 addExpr(Inst, getImm());
966 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
967 assert(N == 1 && "Invalid number of operands!");
968 addExpr(Inst, getImm());
971 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
972 assert(N == 1 && "Invalid number of operands!");
973 addExpr(Inst, getImm());
976 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
977 assert(N == 1 && "Invalid number of operands!");
978 // The constant encodes as the immediate, except for 32, which encodes as
980 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
981 unsigned Imm = CE->getValue();
982 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
985 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
986 assert(N == 1 && "Invalid number of operands!");
987 addExpr(Inst, getImm());
990 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
991 assert(N == 1 && "Invalid number of operands!");
992 // An ASR value of 32 encodes as 0, so that's how we want to add it to
993 // the instruction as well.
994 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
995 int Val = CE->getValue();
996 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
999 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
1000 assert(N == 1 && "Invalid number of operands!");
1001 addExpr(Inst, getImm());
1004 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
1005 assert(N == 1 && "Invalid number of operands!");
1006 addExpr(Inst, getImm());
1009 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
1010 assert(N == 1 && "Invalid number of operands!");
1011 addExpr(Inst, getImm());
1014 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
1015 assert(N == 1 && "Invalid number of operands!");
1016 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
1019 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
1020 assert(N == 1 && "Invalid number of operands!");
1021 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1024 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
1025 assert(N == 3 && "Invalid number of operands!");
1026 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1027 if (!Mem.OffsetRegNum) {
1028 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1029 // Special case for #-0
1030 if (Val == INT32_MIN) Val = 0;
1031 if (Val < 0) Val = -Val;
1032 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1034 // For register offset, we encode the shift type and negation flag
1036 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1037 Mem.ShiftImm, Mem.ShiftType);
1039 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1040 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1041 Inst.addOperand(MCOperand::CreateImm(Val));
1044 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
1045 assert(N == 2 && "Invalid number of operands!");
1046 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1047 assert(CE && "non-constant AM2OffsetImm operand!");
1048 int32_t Val = CE->getValue();
1049 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1050 // Special case for #-0
1051 if (Val == INT32_MIN) Val = 0;
1052 if (Val < 0) Val = -Val;
1053 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
1054 Inst.addOperand(MCOperand::CreateReg(0));
1055 Inst.addOperand(MCOperand::CreateImm(Val));
1058 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
1059 assert(N == 3 && "Invalid number of operands!");
1060 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1061 if (!Mem.OffsetRegNum) {
1062 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1063 // Special case for #-0
1064 if (Val == INT32_MIN) Val = 0;
1065 if (Val < 0) Val = -Val;
1066 Val = ARM_AM::getAM3Opc(AddSub, Val);
1068 // For register offset, we encode the shift type and negation flag
1070 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
1072 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1073 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1074 Inst.addOperand(MCOperand::CreateImm(Val));
1077 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
1078 assert(N == 2 && "Invalid number of operands!");
1079 if (Kind == PostIndexRegister) {
1081 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
1082 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1083 Inst.addOperand(MCOperand::CreateImm(Val));
1088 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
1089 int32_t Val = CE->getValue();
1090 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1091 // Special case for #-0
1092 if (Val == INT32_MIN) Val = 0;
1093 if (Val < 0) Val = -Val;
1094 Val = ARM_AM::getAM3Opc(AddSub, Val);
1095 Inst.addOperand(MCOperand::CreateReg(0));
1096 Inst.addOperand(MCOperand::CreateImm(Val));
1099 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
1100 assert(N == 2 && "Invalid number of operands!");
1101 // The lower two bits are always zero and as such are not encoded.
1102 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
1103 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
1104 // Special case for #-0
1105 if (Val == INT32_MIN) Val = 0;
1106 if (Val < 0) Val = -Val;
1107 Val = ARM_AM::getAM5Opc(AddSub, Val);
1108 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1109 Inst.addOperand(MCOperand::CreateImm(Val));
1112 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1113 assert(N == 2 && "Invalid number of operands!");
1114 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1115 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1116 Inst.addOperand(MCOperand::CreateImm(Val));
1119 void addMemPosImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1120 addMemImm8OffsetOperands(Inst, N);
1123 void addMemNegImm8OffsetOperands(MCInst &Inst, unsigned N) const {
1124 addMemImm8OffsetOperands(Inst, N);
1127 void addMemUImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1128 assert(N == 2 && "Invalid number of operands!");
1129 // If this is an immediate, it's a label reference.
1130 if (Kind == Immediate) {
1131 addExpr(Inst, getImm());
1132 Inst.addOperand(MCOperand::CreateImm(0));
1136 // Otherwise, it's a normal memory reg+offset.
1137 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1138 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1139 Inst.addOperand(MCOperand::CreateImm(Val));
1142 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
1143 assert(N == 2 && "Invalid number of operands!");
1144 // If this is an immediate, it's a label reference.
1145 if (Kind == Immediate) {
1146 addExpr(Inst, getImm());
1147 Inst.addOperand(MCOperand::CreateImm(0));
1151 // Otherwise, it's a normal memory reg+offset.
1152 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
1153 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1154 Inst.addOperand(MCOperand::CreateImm(Val));
1157 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1158 assert(N == 3 && "Invalid number of operands!");
1159 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1160 Mem.ShiftImm, Mem.ShiftType);
1161 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1162 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1163 Inst.addOperand(MCOperand::CreateImm(Val));
1166 void addT2MemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1167 assert(N == 3 && "Invalid number of operands!");
1168 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1169 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1170 Inst.addOperand(MCOperand::CreateImm(Mem.ShiftImm));
1173 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1174 assert(N == 2 && "Invalid number of operands!");
1175 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1176 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1179 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1180 assert(N == 2 && "Invalid number of operands!");
1181 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1182 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1183 Inst.addOperand(MCOperand::CreateImm(Val));
1186 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1187 assert(N == 2 && "Invalid number of operands!");
1188 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 2) : 0;
1189 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1190 Inst.addOperand(MCOperand::CreateImm(Val));
1193 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1194 assert(N == 2 && "Invalid number of operands!");
1195 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue()) : 0;
1196 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1197 Inst.addOperand(MCOperand::CreateImm(Val));
1200 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1201 assert(N == 2 && "Invalid number of operands!");
1202 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1203 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1204 Inst.addOperand(MCOperand::CreateImm(Val));
1207 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1208 assert(N == 1 && "Invalid number of operands!");
1209 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1210 assert(CE && "non-constant post-idx-imm8 operand!");
1211 int Imm = CE->getValue();
1212 bool isAdd = Imm >= 0;
1213 if (Imm == INT32_MIN) Imm = 0;
1214 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1215 Inst.addOperand(MCOperand::CreateImm(Imm));
1218 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1219 assert(N == 2 && "Invalid number of operands!");
1220 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1221 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1224 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1225 assert(N == 2 && "Invalid number of operands!");
1226 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1227 // The sign, shift type, and shift amount are encoded in a single operand
1228 // using the AM2 encoding helpers.
1229 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1230 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1231 PostIdxReg.ShiftTy);
1232 Inst.addOperand(MCOperand::CreateImm(Imm));
1235 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1236 assert(N == 1 && "Invalid number of operands!");
1237 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1240 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1241 assert(N == 1 && "Invalid number of operands!");
1242 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1245 virtual void print(raw_ostream &OS) const;
1247 static ARMOperand *CreateITMask(unsigned Mask, SMLoc S) {
1248 ARMOperand *Op = new ARMOperand(ITCondMask);
1249 Op->ITMask.Mask = Mask;
1255 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1256 ARMOperand *Op = new ARMOperand(CondCode);
1263 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1264 ARMOperand *Op = new ARMOperand(CoprocNum);
1265 Op->Cop.Val = CopVal;
1271 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1272 ARMOperand *Op = new ARMOperand(CoprocReg);
1273 Op->Cop.Val = CopVal;
1279 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1280 ARMOperand *Op = new ARMOperand(CCOut);
1281 Op->Reg.RegNum = RegNum;
1287 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1288 ARMOperand *Op = new ARMOperand(Token);
1289 Op->Tok.Data = Str.data();
1290 Op->Tok.Length = Str.size();
1296 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1297 ARMOperand *Op = new ARMOperand(Register);
1298 Op->Reg.RegNum = RegNum;
1304 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1309 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1310 Op->RegShiftedReg.ShiftTy = ShTy;
1311 Op->RegShiftedReg.SrcReg = SrcReg;
1312 Op->RegShiftedReg.ShiftReg = ShiftReg;
1313 Op->RegShiftedReg.ShiftImm = ShiftImm;
1319 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1323 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1324 Op->RegShiftedImm.ShiftTy = ShTy;
1325 Op->RegShiftedImm.SrcReg = SrcReg;
1326 Op->RegShiftedImm.ShiftImm = ShiftImm;
1332 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1334 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1335 Op->ShifterImm.isASR = isASR;
1336 Op->ShifterImm.Imm = Imm;
1342 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1343 ARMOperand *Op = new ARMOperand(RotateImmediate);
1344 Op->RotImm.Imm = Imm;
1350 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1352 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1353 Op->Bitfield.LSB = LSB;
1354 Op->Bitfield.Width = Width;
1361 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1362 SMLoc StartLoc, SMLoc EndLoc) {
1363 KindTy Kind = RegisterList;
1365 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1366 contains(Regs.front().first))
1367 Kind = DPRRegisterList;
1368 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1369 contains(Regs.front().first))
1370 Kind = SPRRegisterList;
1372 ARMOperand *Op = new ARMOperand(Kind);
1373 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1374 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1375 Op->Registers.push_back(I->first);
1376 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1377 Op->StartLoc = StartLoc;
1378 Op->EndLoc = EndLoc;
1382 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1383 ARMOperand *Op = new ARMOperand(Immediate);
1390 static ARMOperand *CreateMem(unsigned BaseRegNum,
1391 const MCConstantExpr *OffsetImm,
1392 unsigned OffsetRegNum,
1393 ARM_AM::ShiftOpc ShiftType,
1397 ARMOperand *Op = new ARMOperand(Memory);
1398 Op->Mem.BaseRegNum = BaseRegNum;
1399 Op->Mem.OffsetImm = OffsetImm;
1400 Op->Mem.OffsetRegNum = OffsetRegNum;
1401 Op->Mem.ShiftType = ShiftType;
1402 Op->Mem.ShiftImm = ShiftImm;
1403 Op->Mem.isNegative = isNegative;
1409 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1410 ARM_AM::ShiftOpc ShiftTy,
1413 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1414 Op->PostIdxReg.RegNum = RegNum;
1415 Op->PostIdxReg.isAdd = isAdd;
1416 Op->PostIdxReg.ShiftTy = ShiftTy;
1417 Op->PostIdxReg.ShiftImm = ShiftImm;
1423 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1424 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1425 Op->MBOpt.Val = Opt;
1431 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1432 ARMOperand *Op = new ARMOperand(ProcIFlags);
1433 Op->IFlags.Val = IFlags;
1439 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1440 ARMOperand *Op = new ARMOperand(MSRMask);
1441 Op->MMask.Val = MMask;
1448 } // end anonymous namespace.
1450 void ARMOperand::print(raw_ostream &OS) const {
1453 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1456 OS << "<ccout " << getReg() << ">";
1459 static char MaskStr[][6] = { "()", "(t)", "(e)", "(tt)", "(et)", "(te)",
1460 "(ee)", "(ttt)", "(ett)", "(tet)", "(eet)", "(tte)", "(ete)",
1462 assert((ITMask.Mask & 0xf) == ITMask.Mask);
1463 OS << "<it-mask " << MaskStr[ITMask.Mask] << ">";
1467 OS << "<coprocessor number: " << getCoproc() << ">";
1470 OS << "<coprocessor register: " << getCoproc() << ">";
1473 OS << "<mask: " << getMSRMask() << ">";
1476 getImm()->print(OS);
1479 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1483 << " base:" << Mem.BaseRegNum;
1486 case PostIndexRegister:
1487 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1488 << PostIdxReg.RegNum;
1489 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1490 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1491 << PostIdxReg.ShiftImm;
1495 OS << "<ARM_PROC::";
1496 unsigned IFlags = getProcIFlags();
1497 for (int i=2; i >= 0; --i)
1498 if (IFlags & (1 << i))
1499 OS << ARM_PROC::IFlagsToString(1 << i);
1504 OS << "<register " << getReg() << ">";
1506 case ShifterImmediate:
1507 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1508 << " #" << ShifterImm.Imm << ">";
1510 case ShiftedRegister:
1511 OS << "<so_reg_reg "
1512 << RegShiftedReg.SrcReg
1513 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1514 << ", " << RegShiftedReg.ShiftReg << ", "
1515 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1518 case ShiftedImmediate:
1519 OS << "<so_reg_imm "
1520 << RegShiftedImm.SrcReg
1521 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1522 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1525 case RotateImmediate:
1526 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1528 case BitfieldDescriptor:
1529 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1530 << ", width: " << Bitfield.Width << ">";
1533 case DPRRegisterList:
1534 case SPRRegisterList: {
1535 OS << "<register_list ";
1537 const SmallVectorImpl<unsigned> &RegList = getRegList();
1538 for (SmallVectorImpl<unsigned>::const_iterator
1539 I = RegList.begin(), E = RegList.end(); I != E; ) {
1541 if (++I < E) OS << ", ";
1548 OS << "'" << getToken() << "'";
1553 /// @name Auto-generated Match Functions
1556 static unsigned MatchRegisterName(StringRef Name);
1560 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1561 SMLoc &StartLoc, SMLoc &EndLoc) {
1562 RegNo = tryParseRegister();
1564 return (RegNo == (unsigned)-1);
1567 /// Try to parse a register name. The token must be an Identifier when called,
1568 /// and if it is a register name the token is eaten and the register number is
1569 /// returned. Otherwise return -1.
1571 int ARMAsmParser::tryParseRegister() {
1572 const AsmToken &Tok = Parser.getTok();
1573 if (Tok.isNot(AsmToken::Identifier)) return -1;
1575 // FIXME: Validate register for the current architecture; we have to do
1576 // validation later, so maybe there is no need for this here.
1577 std::string upperCase = Tok.getString().str();
1578 std::string lowerCase = LowercaseString(upperCase);
1579 unsigned RegNum = MatchRegisterName(lowerCase);
1581 RegNum = StringSwitch<unsigned>(lowerCase)
1582 .Case("r13", ARM::SP)
1583 .Case("r14", ARM::LR)
1584 .Case("r15", ARM::PC)
1585 .Case("ip", ARM::R12)
1588 if (!RegNum) return -1;
1590 Parser.Lex(); // Eat identifier token.
1594 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1595 // If a recoverable error occurs, return 1. If an irrecoverable error
1596 // occurs, return -1. An irrecoverable error is one where tokens have been
1597 // consumed in the process of trying to parse the shifter (i.e., when it is
1598 // indeed a shifter operand, but malformed).
1599 int ARMAsmParser::tryParseShiftRegister(
1600 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1601 SMLoc S = Parser.getTok().getLoc();
1602 const AsmToken &Tok = Parser.getTok();
1603 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1605 std::string upperCase = Tok.getString().str();
1606 std::string lowerCase = LowercaseString(upperCase);
1607 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1608 .Case("lsl", ARM_AM::lsl)
1609 .Case("lsr", ARM_AM::lsr)
1610 .Case("asr", ARM_AM::asr)
1611 .Case("ror", ARM_AM::ror)
1612 .Case("rrx", ARM_AM::rrx)
1613 .Default(ARM_AM::no_shift);
1615 if (ShiftTy == ARM_AM::no_shift)
1618 Parser.Lex(); // Eat the operator.
1620 // The source register for the shift has already been added to the
1621 // operand list, so we need to pop it off and combine it into the shifted
1622 // register operand instead.
1623 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1624 if (!PrevOp->isReg())
1625 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1626 int SrcReg = PrevOp->getReg();
1629 if (ShiftTy == ARM_AM::rrx) {
1630 // RRX Doesn't have an explicit shift amount. The encoder expects
1631 // the shift register to be the same as the source register. Seems odd,
1635 // Figure out if this is shifted by a constant or a register (for non-RRX).
1636 if (Parser.getTok().is(AsmToken::Hash)) {
1637 Parser.Lex(); // Eat hash.
1638 SMLoc ImmLoc = Parser.getTok().getLoc();
1639 const MCExpr *ShiftExpr = 0;
1640 if (getParser().ParseExpression(ShiftExpr)) {
1641 Error(ImmLoc, "invalid immediate shift value");
1644 // The expression must be evaluatable as an immediate.
1645 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1647 Error(ImmLoc, "invalid immediate shift value");
1650 // Range check the immediate.
1651 // lsl, ror: 0 <= imm <= 31
1652 // lsr, asr: 0 <= imm <= 32
1653 Imm = CE->getValue();
1655 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1656 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1657 Error(ImmLoc, "immediate shift value out of range");
1660 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1661 ShiftReg = tryParseRegister();
1662 SMLoc L = Parser.getTok().getLoc();
1663 if (ShiftReg == -1) {
1664 Error (L, "expected immediate or register in shift operand");
1668 Error (Parser.getTok().getLoc(),
1669 "expected immediate or register in shift operand");
1674 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1675 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1677 S, Parser.getTok().getLoc()));
1679 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1680 S, Parser.getTok().getLoc()));
1686 /// Try to parse a register name. The token must be an Identifier when called.
1687 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1688 /// if there is a "writeback". 'true' if it's not a register.
1690 /// TODO this is likely to change to allow different register types and or to
1691 /// parse for a specific register type.
1693 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1694 SMLoc S = Parser.getTok().getLoc();
1695 int RegNo = tryParseRegister();
1699 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1701 const AsmToken &ExclaimTok = Parser.getTok();
1702 if (ExclaimTok.is(AsmToken::Exclaim)) {
1703 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1704 ExclaimTok.getLoc()));
1705 Parser.Lex(); // Eat exclaim token
1711 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1712 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1714 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1715 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1717 switch (Name.size()) {
1720 if (Name[0] != CoprocOp)
1737 if (Name[0] != CoprocOp || Name[1] != '1')
1741 case '0': return 10;
1742 case '1': return 11;
1743 case '2': return 12;
1744 case '3': return 13;
1745 case '4': return 14;
1746 case '5': return 15;
1754 /// parseITCondCode - Try to parse a condition code for an IT instruction.
1755 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1756 parseITCondCode(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1757 SMLoc S = Parser.getTok().getLoc();
1758 const AsmToken &Tok = Parser.getTok();
1759 if (!Tok.is(AsmToken::Identifier))
1760 return MatchOperand_NoMatch;
1761 unsigned CC = StringSwitch<unsigned>(Tok.getString())
1762 .Case("eq", ARMCC::EQ)
1763 .Case("ne", ARMCC::NE)
1764 .Case("hs", ARMCC::HS)
1765 .Case("cs", ARMCC::HS)
1766 .Case("lo", ARMCC::LO)
1767 .Case("cc", ARMCC::LO)
1768 .Case("mi", ARMCC::MI)
1769 .Case("pl", ARMCC::PL)
1770 .Case("vs", ARMCC::VS)
1771 .Case("vc", ARMCC::VC)
1772 .Case("hi", ARMCC::HI)
1773 .Case("ls", ARMCC::LS)
1774 .Case("ge", ARMCC::GE)
1775 .Case("lt", ARMCC::LT)
1776 .Case("gt", ARMCC::GT)
1777 .Case("le", ARMCC::LE)
1778 .Case("al", ARMCC::AL)
1781 return MatchOperand_NoMatch;
1782 Parser.Lex(); // Eat the token.
1784 Operands.push_back(ARMOperand::CreateCondCode(ARMCC::CondCodes(CC), S));
1786 return MatchOperand_Success;
1789 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1790 /// token must be an Identifier when called, and if it is a coprocessor
1791 /// number, the token is eaten and the operand is added to the operand list.
1792 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1793 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1794 SMLoc S = Parser.getTok().getLoc();
1795 const AsmToken &Tok = Parser.getTok();
1796 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1798 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1800 return MatchOperand_NoMatch;
1802 Parser.Lex(); // Eat identifier token.
1803 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1804 return MatchOperand_Success;
1807 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1808 /// token must be an Identifier when called, and if it is a coprocessor
1809 /// number, the token is eaten and the operand is added to the operand list.
1810 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1811 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1812 SMLoc S = Parser.getTok().getLoc();
1813 const AsmToken &Tok = Parser.getTok();
1814 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1816 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1818 return MatchOperand_NoMatch;
1820 Parser.Lex(); // Eat identifier token.
1821 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1822 return MatchOperand_Success;
1825 /// Parse a register list, return it if successful else return null. The first
1826 /// token must be a '{' when called.
1828 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1829 assert(Parser.getTok().is(AsmToken::LCurly) &&
1830 "Token is not a Left Curly Brace");
1831 SMLoc S = Parser.getTok().getLoc();
1833 // Read the rest of the registers in the list.
1834 unsigned PrevRegNum = 0;
1835 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1838 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1839 Parser.Lex(); // Eat non-identifier token.
1841 const AsmToken &RegTok = Parser.getTok();
1842 SMLoc RegLoc = RegTok.getLoc();
1843 if (RegTok.isNot(AsmToken::Identifier)) {
1844 Error(RegLoc, "register expected");
1848 int RegNum = tryParseRegister();
1850 Error(RegLoc, "register expected");
1855 int Reg = PrevRegNum;
1858 Registers.push_back(std::make_pair(Reg, RegLoc));
1859 } while (Reg != RegNum);
1861 Registers.push_back(std::make_pair(RegNum, RegLoc));
1864 PrevRegNum = RegNum;
1865 } while (Parser.getTok().is(AsmToken::Comma) ||
1866 Parser.getTok().is(AsmToken::Minus));
1868 // Process the right curly brace of the list.
1869 const AsmToken &RCurlyTok = Parser.getTok();
1870 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1871 Error(RCurlyTok.getLoc(), "'}' expected");
1875 SMLoc E = RCurlyTok.getLoc();
1876 Parser.Lex(); // Eat right curly brace token.
1878 // Verify the register list.
1879 bool EmittedWarning = false;
1880 unsigned HighRegNum = 0;
1881 BitVector RegMap(32);
1882 for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
1883 const std::pair<unsigned, SMLoc> &RegInfo = Registers[i];
1884 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1887 Error(RegInfo.second, "register duplicated in register list");
1891 if (!EmittedWarning && Reg < HighRegNum)
1892 Warning(RegInfo.second,
1893 "register not in ascending order in register list");
1896 HighRegNum = std::max(Reg, HighRegNum);
1899 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1903 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1904 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1905 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1906 SMLoc S = Parser.getTok().getLoc();
1907 const AsmToken &Tok = Parser.getTok();
1908 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1909 StringRef OptStr = Tok.getString();
1911 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1912 .Case("sy", ARM_MB::SY)
1913 .Case("st", ARM_MB::ST)
1914 .Case("sh", ARM_MB::ISH)
1915 .Case("ish", ARM_MB::ISH)
1916 .Case("shst", ARM_MB::ISHST)
1917 .Case("ishst", ARM_MB::ISHST)
1918 .Case("nsh", ARM_MB::NSH)
1919 .Case("un", ARM_MB::NSH)
1920 .Case("nshst", ARM_MB::NSHST)
1921 .Case("unst", ARM_MB::NSHST)
1922 .Case("osh", ARM_MB::OSH)
1923 .Case("oshst", ARM_MB::OSHST)
1927 return MatchOperand_NoMatch;
1929 Parser.Lex(); // Eat identifier token.
1930 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1931 return MatchOperand_Success;
1934 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1935 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1936 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1937 SMLoc S = Parser.getTok().getLoc();
1938 const AsmToken &Tok = Parser.getTok();
1939 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1940 StringRef IFlagsStr = Tok.getString();
1942 unsigned IFlags = 0;
1943 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1944 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1945 .Case("a", ARM_PROC::A)
1946 .Case("i", ARM_PROC::I)
1947 .Case("f", ARM_PROC::F)
1950 // If some specific iflag is already set, it means that some letter is
1951 // present more than once, this is not acceptable.
1952 if (Flag == ~0U || (IFlags & Flag))
1953 return MatchOperand_NoMatch;
1958 Parser.Lex(); // Eat identifier token.
1959 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1960 return MatchOperand_Success;
1963 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1964 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1965 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1966 SMLoc S = Parser.getTok().getLoc();
1967 const AsmToken &Tok = Parser.getTok();
1968 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1969 StringRef Mask = Tok.getString();
1971 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1972 size_t Start = 0, Next = Mask.find('_');
1973 StringRef Flags = "";
1974 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1975 if (Next != StringRef::npos)
1976 Flags = Mask.slice(Next+1, Mask.size());
1978 // FlagsVal contains the complete mask:
1980 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1981 unsigned FlagsVal = 0;
1983 if (SpecReg == "apsr") {
1984 FlagsVal = StringSwitch<unsigned>(Flags)
1985 .Case("nzcvq", 0x8) // same as CPSR_f
1986 .Case("g", 0x4) // same as CPSR_s
1987 .Case("nzcvqg", 0xc) // same as CPSR_fs
1990 if (FlagsVal == ~0U) {
1992 return MatchOperand_NoMatch;
1994 FlagsVal = 0; // No flag
1996 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1997 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1999 for (int i = 0, e = Flags.size(); i != e; ++i) {
2000 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
2007 // If some specific flag is already set, it means that some letter is
2008 // present more than once, this is not acceptable.
2009 if (FlagsVal == ~0U || (FlagsVal & Flag))
2010 return MatchOperand_NoMatch;
2013 } else // No match for special register.
2014 return MatchOperand_NoMatch;
2016 // Special register without flags are equivalent to "fc" flags.
2020 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
2021 if (SpecReg == "spsr")
2024 Parser.Lex(); // Eat identifier token.
2025 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
2026 return MatchOperand_Success;
2029 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2030 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
2031 int Low, int High) {
2032 const AsmToken &Tok = Parser.getTok();
2033 if (Tok.isNot(AsmToken::Identifier)) {
2034 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2035 return MatchOperand_ParseFail;
2037 StringRef ShiftName = Tok.getString();
2038 std::string LowerOp = LowercaseString(Op);
2039 std::string UpperOp = UppercaseString(Op);
2040 if (ShiftName != LowerOp && ShiftName != UpperOp) {
2041 Error(Parser.getTok().getLoc(), Op + " operand expected.");
2042 return MatchOperand_ParseFail;
2044 Parser.Lex(); // Eat shift type token.
2046 // There must be a '#' and a shift amount.
2047 if (Parser.getTok().isNot(AsmToken::Hash)) {
2048 Error(Parser.getTok().getLoc(), "'#' expected");
2049 return MatchOperand_ParseFail;
2051 Parser.Lex(); // Eat hash token.
2053 const MCExpr *ShiftAmount;
2054 SMLoc Loc = Parser.getTok().getLoc();
2055 if (getParser().ParseExpression(ShiftAmount)) {
2056 Error(Loc, "illegal expression");
2057 return MatchOperand_ParseFail;
2059 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2061 Error(Loc, "constant expression expected");
2062 return MatchOperand_ParseFail;
2064 int Val = CE->getValue();
2065 if (Val < Low || Val > High) {
2066 Error(Loc, "immediate value out of range");
2067 return MatchOperand_ParseFail;
2070 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
2072 return MatchOperand_Success;
2075 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2076 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2077 const AsmToken &Tok = Parser.getTok();
2078 SMLoc S = Tok.getLoc();
2079 if (Tok.isNot(AsmToken::Identifier)) {
2080 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2081 return MatchOperand_ParseFail;
2083 int Val = StringSwitch<int>(Tok.getString())
2087 Parser.Lex(); // Eat the token.
2090 Error(Tok.getLoc(), "'be' or 'le' operand expected");
2091 return MatchOperand_ParseFail;
2093 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
2095 S, Parser.getTok().getLoc()));
2096 return MatchOperand_Success;
2099 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
2100 /// instructions. Legal values are:
2101 /// lsl #n 'n' in [0,31]
2102 /// asr #n 'n' in [1,32]
2103 /// n == 32 encoded as n == 0.
2104 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2105 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2106 const AsmToken &Tok = Parser.getTok();
2107 SMLoc S = Tok.getLoc();
2108 if (Tok.isNot(AsmToken::Identifier)) {
2109 Error(S, "shift operator 'asr' or 'lsl' expected");
2110 return MatchOperand_ParseFail;
2112 StringRef ShiftName = Tok.getString();
2114 if (ShiftName == "lsl" || ShiftName == "LSL")
2116 else if (ShiftName == "asr" || ShiftName == "ASR")
2119 Error(S, "shift operator 'asr' or 'lsl' expected");
2120 return MatchOperand_ParseFail;
2122 Parser.Lex(); // Eat the operator.
2124 // A '#' and a shift amount.
2125 if (Parser.getTok().isNot(AsmToken::Hash)) {
2126 Error(Parser.getTok().getLoc(), "'#' expected");
2127 return MatchOperand_ParseFail;
2129 Parser.Lex(); // Eat hash token.
2131 const MCExpr *ShiftAmount;
2132 SMLoc E = Parser.getTok().getLoc();
2133 if (getParser().ParseExpression(ShiftAmount)) {
2134 Error(E, "malformed shift expression");
2135 return MatchOperand_ParseFail;
2137 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2139 Error(E, "shift amount must be an immediate");
2140 return MatchOperand_ParseFail;
2143 int64_t Val = CE->getValue();
2145 // Shift amount must be in [1,32]
2146 if (Val < 1 || Val > 32) {
2147 Error(E, "'asr' shift amount must be in range [1,32]");
2148 return MatchOperand_ParseFail;
2150 // asr #32 encoded as asr #0.
2151 if (Val == 32) Val = 0;
2153 // Shift amount must be in [1,32]
2154 if (Val < 0 || Val > 31) {
2155 Error(E, "'lsr' shift amount must be in range [0,31]");
2156 return MatchOperand_ParseFail;
2160 E = Parser.getTok().getLoc();
2161 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
2163 return MatchOperand_Success;
2166 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
2167 /// of instructions. Legal values are:
2168 /// ror #n 'n' in {0, 8, 16, 24}
2169 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2170 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2171 const AsmToken &Tok = Parser.getTok();
2172 SMLoc S = Tok.getLoc();
2173 if (Tok.isNot(AsmToken::Identifier)) {
2174 Error(S, "rotate operator 'ror' expected");
2175 return MatchOperand_ParseFail;
2177 StringRef ShiftName = Tok.getString();
2178 if (ShiftName != "ror" && ShiftName != "ROR") {
2179 Error(S, "rotate operator 'ror' expected");
2180 return MatchOperand_ParseFail;
2182 Parser.Lex(); // Eat the operator.
2184 // A '#' and a rotate amount.
2185 if (Parser.getTok().isNot(AsmToken::Hash)) {
2186 Error(Parser.getTok().getLoc(), "'#' expected");
2187 return MatchOperand_ParseFail;
2189 Parser.Lex(); // Eat hash token.
2191 const MCExpr *ShiftAmount;
2192 SMLoc E = Parser.getTok().getLoc();
2193 if (getParser().ParseExpression(ShiftAmount)) {
2194 Error(E, "malformed rotate expression");
2195 return MatchOperand_ParseFail;
2197 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
2199 Error(E, "rotate amount must be an immediate");
2200 return MatchOperand_ParseFail;
2203 int64_t Val = CE->getValue();
2204 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
2205 // normally, zero is represented in asm by omitting the rotate operand
2207 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
2208 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2209 return MatchOperand_ParseFail;
2212 E = Parser.getTok().getLoc();
2213 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2215 return MatchOperand_Success;
2218 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2219 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2220 SMLoc S = Parser.getTok().getLoc();
2221 // The bitfield descriptor is really two operands, the LSB and the width.
2222 if (Parser.getTok().isNot(AsmToken::Hash)) {
2223 Error(Parser.getTok().getLoc(), "'#' expected");
2224 return MatchOperand_ParseFail;
2226 Parser.Lex(); // Eat hash token.
2228 const MCExpr *LSBExpr;
2229 SMLoc E = Parser.getTok().getLoc();
2230 if (getParser().ParseExpression(LSBExpr)) {
2231 Error(E, "malformed immediate expression");
2232 return MatchOperand_ParseFail;
2234 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2236 Error(E, "'lsb' operand must be an immediate");
2237 return MatchOperand_ParseFail;
2240 int64_t LSB = CE->getValue();
2241 // The LSB must be in the range [0,31]
2242 if (LSB < 0 || LSB > 31) {
2243 Error(E, "'lsb' operand must be in the range [0,31]");
2244 return MatchOperand_ParseFail;
2246 E = Parser.getTok().getLoc();
2248 // Expect another immediate operand.
2249 if (Parser.getTok().isNot(AsmToken::Comma)) {
2250 Error(Parser.getTok().getLoc(), "too few operands");
2251 return MatchOperand_ParseFail;
2253 Parser.Lex(); // Eat hash token.
2254 if (Parser.getTok().isNot(AsmToken::Hash)) {
2255 Error(Parser.getTok().getLoc(), "'#' expected");
2256 return MatchOperand_ParseFail;
2258 Parser.Lex(); // Eat hash token.
2260 const MCExpr *WidthExpr;
2261 if (getParser().ParseExpression(WidthExpr)) {
2262 Error(E, "malformed immediate expression");
2263 return MatchOperand_ParseFail;
2265 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2267 Error(E, "'width' operand must be an immediate");
2268 return MatchOperand_ParseFail;
2271 int64_t Width = CE->getValue();
2272 // The LSB must be in the range [1,32-lsb]
2273 if (Width < 1 || Width > 32 - LSB) {
2274 Error(E, "'width' operand must be in the range [1,32-lsb]");
2275 return MatchOperand_ParseFail;
2277 E = Parser.getTok().getLoc();
2279 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2281 return MatchOperand_Success;
2284 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2285 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2286 // Check for a post-index addressing register operand. Specifically:
2287 // postidx_reg := '+' register {, shift}
2288 // | '-' register {, shift}
2289 // | register {, shift}
2291 // This method must return MatchOperand_NoMatch without consuming any tokens
2292 // in the case where there is no match, as other alternatives take other
2294 AsmToken Tok = Parser.getTok();
2295 SMLoc S = Tok.getLoc();
2296 bool haveEaten = false;
2299 if (Tok.is(AsmToken::Plus)) {
2300 Parser.Lex(); // Eat the '+' token.
2302 } else if (Tok.is(AsmToken::Minus)) {
2303 Parser.Lex(); // Eat the '-' token.
2307 if (Parser.getTok().is(AsmToken::Identifier))
2308 Reg = tryParseRegister();
2311 return MatchOperand_NoMatch;
2312 Error(Parser.getTok().getLoc(), "register expected");
2313 return MatchOperand_ParseFail;
2315 SMLoc E = Parser.getTok().getLoc();
2317 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2318 unsigned ShiftImm = 0;
2319 if (Parser.getTok().is(AsmToken::Comma)) {
2320 Parser.Lex(); // Eat the ','.
2321 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2322 return MatchOperand_ParseFail;
2325 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2328 return MatchOperand_Success;
2331 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2332 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2333 // Check for a post-index addressing register operand. Specifically:
2334 // am3offset := '+' register
2341 // This method must return MatchOperand_NoMatch without consuming any tokens
2342 // in the case where there is no match, as other alternatives take other
2344 AsmToken Tok = Parser.getTok();
2345 SMLoc S = Tok.getLoc();
2347 // Do immediates first, as we always parse those if we have a '#'.
2348 if (Parser.getTok().is(AsmToken::Hash)) {
2349 Parser.Lex(); // Eat the '#'.
2350 // Explicitly look for a '-', as we need to encode negative zero
2352 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2353 const MCExpr *Offset;
2354 if (getParser().ParseExpression(Offset))
2355 return MatchOperand_ParseFail;
2356 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2358 Error(S, "constant expression expected");
2359 return MatchOperand_ParseFail;
2361 SMLoc E = Tok.getLoc();
2362 // Negative zero is encoded as the flag value INT32_MIN.
2363 int32_t Val = CE->getValue();
2364 if (isNegative && Val == 0)
2368 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2370 return MatchOperand_Success;
2374 bool haveEaten = false;
2377 if (Tok.is(AsmToken::Plus)) {
2378 Parser.Lex(); // Eat the '+' token.
2380 } else if (Tok.is(AsmToken::Minus)) {
2381 Parser.Lex(); // Eat the '-' token.
2385 if (Parser.getTok().is(AsmToken::Identifier))
2386 Reg = tryParseRegister();
2389 return MatchOperand_NoMatch;
2390 Error(Parser.getTok().getLoc(), "register expected");
2391 return MatchOperand_ParseFail;
2393 SMLoc E = Parser.getTok().getLoc();
2395 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2398 return MatchOperand_Success;
2401 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2402 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2403 /// when they refer multiple MIOperands inside a single one.
2405 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2406 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2407 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2409 // Create a writeback register dummy placeholder.
2410 Inst.addOperand(MCOperand::CreateImm(0));
2412 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2413 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2417 /// cvtLdWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2418 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2419 /// when they refer multiple MIOperands inside a single one.
2421 cvtLdWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2422 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2423 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2425 // Create a writeback register dummy placeholder.
2426 Inst.addOperand(MCOperand::CreateImm(0));
2428 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2429 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2434 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2435 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2436 /// when they refer multiple MIOperands inside a single one.
2438 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2439 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2440 // Create a writeback register dummy placeholder.
2441 Inst.addOperand(MCOperand::CreateImm(0));
2442 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2443 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2444 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2448 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2449 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2450 /// when they refer multiple MIOperands inside a single one.
2452 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2453 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2454 // Create a writeback register dummy placeholder.
2455 Inst.addOperand(MCOperand::CreateImm(0));
2456 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2457 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2458 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2462 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2463 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2464 /// when they refer multiple MIOperands inside a single one.
2466 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2467 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2468 // Create a writeback register dummy placeholder.
2469 Inst.addOperand(MCOperand::CreateImm(0));
2470 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2471 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2472 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2476 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2477 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2478 /// when they refer multiple MIOperands inside a single one.
2480 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2481 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2483 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2484 // Create a writeback register dummy placeholder.
2485 Inst.addOperand(MCOperand::CreateImm(0));
2487 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2489 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2491 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2495 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2496 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2497 /// when they refer multiple MIOperands inside a single one.
2499 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2500 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2502 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2503 // Create a writeback register dummy placeholder.
2504 Inst.addOperand(MCOperand::CreateImm(0));
2506 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2508 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2510 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2514 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2515 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2516 /// when they refer multiple MIOperands inside a single one.
2518 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2519 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2520 // Create a writeback register dummy placeholder.
2521 Inst.addOperand(MCOperand::CreateImm(0));
2523 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2525 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2527 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2529 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2533 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2534 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2535 /// when they refer multiple MIOperands inside a single one.
2537 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2538 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2539 // Create a writeback register dummy placeholder.
2540 Inst.addOperand(MCOperand::CreateImm(0));
2542 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2544 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2546 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2548 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2552 /// cvtLdrdPre - Convert parsed operands to MCInst.
2553 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2554 /// when they refer multiple MIOperands inside a single one.
2556 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2557 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2559 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2560 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2561 // Create a writeback register dummy placeholder.
2562 Inst.addOperand(MCOperand::CreateImm(0));
2564 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2566 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2570 /// cvtStrdPre - Convert parsed operands to MCInst.
2571 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2572 /// when they refer multiple MIOperands inside a single one.
2574 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2575 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2576 // Create a writeback register dummy placeholder.
2577 Inst.addOperand(MCOperand::CreateImm(0));
2579 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2580 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2582 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2584 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2588 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2589 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2590 /// when they refer multiple MIOperands inside a single one.
2592 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2593 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2594 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2595 // Create a writeback register dummy placeholder.
2596 Inst.addOperand(MCOperand::CreateImm(0));
2597 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2598 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2602 /// cvtThumbMultiple- Convert parsed operands to MCInst.
2603 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2604 /// when they refer multiple MIOperands inside a single one.
2606 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
2607 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2608 // The second source operand must be the same register as the destination
2610 if (Operands.size() == 6 &&
2611 (((ARMOperand*)Operands[3])->getReg() !=
2612 ((ARMOperand*)Operands[5])->getReg()) &&
2613 (((ARMOperand*)Operands[3])->getReg() !=
2614 ((ARMOperand*)Operands[4])->getReg())) {
2615 Error(Operands[3]->getStartLoc(),
2616 "destination register must match source register");
2619 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2620 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
2621 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
2622 // If we have a three-operand form, use that, else the second source operand
2623 // is just the destination operand again.
2624 if (Operands.size() == 6)
2625 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
2627 Inst.addOperand(Inst.getOperand(0));
2628 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
2633 /// Parse an ARM memory expression, return false if successful else return true
2634 /// or an error. The first token must be a '[' when called.
2636 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2638 assert(Parser.getTok().is(AsmToken::LBrac) &&
2639 "Token is not a Left Bracket");
2640 S = Parser.getTok().getLoc();
2641 Parser.Lex(); // Eat left bracket token.
2643 const AsmToken &BaseRegTok = Parser.getTok();
2644 int BaseRegNum = tryParseRegister();
2645 if (BaseRegNum == -1)
2646 return Error(BaseRegTok.getLoc(), "register expected");
2648 // The next token must either be a comma or a closing bracket.
2649 const AsmToken &Tok = Parser.getTok();
2650 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2651 return Error(Tok.getLoc(), "malformed memory operand");
2653 if (Tok.is(AsmToken::RBrac)) {
2655 Parser.Lex(); // Eat right bracket token.
2657 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2663 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2664 Parser.Lex(); // Eat the comma.
2666 // If we have a '#' it's an immediate offset, else assume it's a register
2668 if (Parser.getTok().is(AsmToken::Hash)) {
2669 Parser.Lex(); // Eat the '#'.
2670 E = Parser.getTok().getLoc();
2672 bool isNegative = getParser().getTok().is(AsmToken::Minus);
2673 const MCExpr *Offset;
2674 if (getParser().ParseExpression(Offset))
2677 // The expression has to be a constant. Memory references with relocations
2678 // don't come through here, as they use the <label> forms of the relevant
2680 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2682 return Error (E, "constant expression expected");
2684 // If the constant was #-0, represent it as INT32_MIN.
2685 int32_t Val = CE->getValue();
2686 if (isNegative && Val == 0)
2687 CE = MCConstantExpr::Create(INT32_MIN, getContext());
2689 // Now we should have the closing ']'
2690 E = Parser.getTok().getLoc();
2691 if (Parser.getTok().isNot(AsmToken::RBrac))
2692 return Error(E, "']' expected");
2693 Parser.Lex(); // Eat right bracket token.
2695 // Don't worry about range checking the value here. That's handled by
2696 // the is*() predicates.
2697 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2698 ARM_AM::no_shift, 0, false, S,E));
2700 // If there's a pre-indexing writeback marker, '!', just add it as a token
2702 if (Parser.getTok().is(AsmToken::Exclaim)) {
2703 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2704 Parser.Lex(); // Eat the '!'.
2710 // The register offset is optionally preceded by a '+' or '-'
2711 bool isNegative = false;
2712 if (Parser.getTok().is(AsmToken::Minus)) {
2714 Parser.Lex(); // Eat the '-'.
2715 } else if (Parser.getTok().is(AsmToken::Plus)) {
2717 Parser.Lex(); // Eat the '+'.
2720 E = Parser.getTok().getLoc();
2721 int OffsetRegNum = tryParseRegister();
2722 if (OffsetRegNum == -1)
2723 return Error(E, "register expected");
2725 // If there's a shift operator, handle it.
2726 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2727 unsigned ShiftImm = 0;
2728 if (Parser.getTok().is(AsmToken::Comma)) {
2729 Parser.Lex(); // Eat the ','.
2730 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2734 // Now we should have the closing ']'
2735 E = Parser.getTok().getLoc();
2736 if (Parser.getTok().isNot(AsmToken::RBrac))
2737 return Error(E, "']' expected");
2738 Parser.Lex(); // Eat right bracket token.
2740 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2741 ShiftType, ShiftImm, isNegative,
2744 // If there's a pre-indexing writeback marker, '!', just add it as a token
2746 if (Parser.getTok().is(AsmToken::Exclaim)) {
2747 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2748 Parser.Lex(); // Eat the '!'.
2754 /// parseMemRegOffsetShift - one of these two:
2755 /// ( lsl | lsr | asr | ror ) , # shift_amount
2757 /// return true if it parses a shift otherwise it returns false.
2758 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2760 SMLoc Loc = Parser.getTok().getLoc();
2761 const AsmToken &Tok = Parser.getTok();
2762 if (Tok.isNot(AsmToken::Identifier))
2764 StringRef ShiftName = Tok.getString();
2765 if (ShiftName == "lsl" || ShiftName == "LSL")
2767 else if (ShiftName == "lsr" || ShiftName == "LSR")
2769 else if (ShiftName == "asr" || ShiftName == "ASR")
2771 else if (ShiftName == "ror" || ShiftName == "ROR")
2773 else if (ShiftName == "rrx" || ShiftName == "RRX")
2776 return Error(Loc, "illegal shift operator");
2777 Parser.Lex(); // Eat shift type token.
2779 // rrx stands alone.
2781 if (St != ARM_AM::rrx) {
2782 Loc = Parser.getTok().getLoc();
2783 // A '#' and a shift amount.
2784 const AsmToken &HashTok = Parser.getTok();
2785 if (HashTok.isNot(AsmToken::Hash))
2786 return Error(HashTok.getLoc(), "'#' expected");
2787 Parser.Lex(); // Eat hash token.
2790 if (getParser().ParseExpression(Expr))
2792 // Range check the immediate.
2793 // lsl, ror: 0 <= imm <= 31
2794 // lsr, asr: 0 <= imm <= 32
2795 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2797 return Error(Loc, "shift amount must be an immediate");
2798 int64_t Imm = CE->getValue();
2800 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2801 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2802 return Error(Loc, "immediate shift value out of range");
2809 /// Parse a arm instruction operand. For now this parses the operand regardless
2810 /// of the mnemonic.
2811 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2812 StringRef Mnemonic) {
2815 // Check if the current operand has a custom associated parser, if so, try to
2816 // custom parse the operand, or fallback to the general approach.
2817 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2818 if (ResTy == MatchOperand_Success)
2820 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2821 // there was a match, but an error occurred, in which case, just return that
2822 // the operand parsing failed.
2823 if (ResTy == MatchOperand_ParseFail)
2826 switch (getLexer().getKind()) {
2828 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2830 case AsmToken::Identifier: {
2831 if (!tryParseRegisterWithWriteBack(Operands))
2833 int Res = tryParseShiftRegister(Operands);
2834 if (Res == 0) // success
2836 else if (Res == -1) // irrecoverable error
2839 // Fall though for the Identifier case that is not a register or a
2842 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2843 case AsmToken::Dot: { // . as a branch target
2844 // This was not a register so parse other operands that start with an
2845 // identifier (like labels) as expressions and create them as immediates.
2846 const MCExpr *IdVal;
2847 S = Parser.getTok().getLoc();
2848 if (getParser().ParseExpression(IdVal))
2850 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2851 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2854 case AsmToken::LBrac:
2855 return parseMemory(Operands);
2856 case AsmToken::LCurly:
2857 return parseRegisterList(Operands);
2858 case AsmToken::Hash: {
2859 // #42 -> immediate.
2860 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2861 S = Parser.getTok().getLoc();
2863 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2864 const MCExpr *ImmVal;
2865 if (getParser().ParseExpression(ImmVal))
2867 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ImmVal);
2869 Error(S, "constant expression expected");
2870 return MatchOperand_ParseFail;
2872 int32_t Val = CE->getValue();
2873 if (isNegative && Val == 0)
2874 ImmVal = MCConstantExpr::Create(INT32_MIN, getContext());
2875 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2876 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2879 case AsmToken::Colon: {
2880 // ":lower16:" and ":upper16:" expression prefixes
2881 // FIXME: Check it's an expression prefix,
2882 // e.g. (FOO - :lower16:BAR) isn't legal.
2883 ARMMCExpr::VariantKind RefKind;
2884 if (parsePrefix(RefKind))
2887 const MCExpr *SubExprVal;
2888 if (getParser().ParseExpression(SubExprVal))
2891 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2893 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2894 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2900 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2901 // :lower16: and :upper16:.
2902 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2903 RefKind = ARMMCExpr::VK_ARM_None;
2905 // :lower16: and :upper16: modifiers
2906 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2907 Parser.Lex(); // Eat ':'
2909 if (getLexer().isNot(AsmToken::Identifier)) {
2910 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2914 StringRef IDVal = Parser.getTok().getIdentifier();
2915 if (IDVal == "lower16") {
2916 RefKind = ARMMCExpr::VK_ARM_LO16;
2917 } else if (IDVal == "upper16") {
2918 RefKind = ARMMCExpr::VK_ARM_HI16;
2920 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2925 if (getLexer().isNot(AsmToken::Colon)) {
2926 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2929 Parser.Lex(); // Eat the last ':'
2934 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2935 MCSymbolRefExpr::VariantKind Variant) {
2936 // Recurse over the given expression, rebuilding it to apply the given variant
2937 // to the leftmost symbol.
2938 if (Variant == MCSymbolRefExpr::VK_None)
2941 switch (E->getKind()) {
2942 case MCExpr::Target:
2943 llvm_unreachable("Can't handle target expr yet");
2944 case MCExpr::Constant:
2945 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2947 case MCExpr::SymbolRef: {
2948 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2950 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2953 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2957 llvm_unreachable("Can't handle unary expressions yet");
2959 case MCExpr::Binary: {
2960 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2961 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2962 const MCExpr *RHS = BE->getRHS();
2966 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2970 assert(0 && "Invalid expression kind!");
2974 /// \brief Given a mnemonic, split out possible predication code and carry
2975 /// setting letters to form a canonical mnemonic and flags.
2977 // FIXME: Would be nice to autogen this.
2978 // FIXME: This is a bit of a maze of special cases.
2979 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2980 unsigned &PredicationCode,
2982 unsigned &ProcessorIMod,
2983 StringRef &ITMask) {
2984 PredicationCode = ARMCC::AL;
2985 CarrySetting = false;
2988 // Ignore some mnemonics we know aren't predicated forms.
2990 // FIXME: Would be nice to autogen this.
2991 if ((Mnemonic == "movs" && isThumb()) ||
2992 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2993 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2994 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2995 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2996 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2997 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2998 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
3001 // First, split out any predication code. Ignore mnemonics we know aren't
3002 // predicated but do have a carry-set and so weren't caught above.
3003 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
3004 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
3005 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls" &&
3006 Mnemonic != "sbcs" && Mnemonic != "rscs") {
3007 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
3008 .Case("eq", ARMCC::EQ)
3009 .Case("ne", ARMCC::NE)
3010 .Case("hs", ARMCC::HS)
3011 .Case("cs", ARMCC::HS)
3012 .Case("lo", ARMCC::LO)
3013 .Case("cc", ARMCC::LO)
3014 .Case("mi", ARMCC::MI)
3015 .Case("pl", ARMCC::PL)
3016 .Case("vs", ARMCC::VS)
3017 .Case("vc", ARMCC::VC)
3018 .Case("hi", ARMCC::HI)
3019 .Case("ls", ARMCC::LS)
3020 .Case("ge", ARMCC::GE)
3021 .Case("lt", ARMCC::LT)
3022 .Case("gt", ARMCC::GT)
3023 .Case("le", ARMCC::LE)
3024 .Case("al", ARMCC::AL)
3027 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
3028 PredicationCode = CC;
3032 // Next, determine if we have a carry setting bit. We explicitly ignore all
3033 // the instructions we know end in 's'.
3034 if (Mnemonic.endswith("s") &&
3035 !(Mnemonic == "cps" || Mnemonic == "mls" ||
3036 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
3037 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
3038 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
3039 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
3040 (Mnemonic == "movs" && isThumb()))) {
3041 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
3042 CarrySetting = true;
3045 // The "cps" instruction can have a interrupt mode operand which is glued into
3046 // the mnemonic. Check if this is the case, split it and parse the imod op
3047 if (Mnemonic.startswith("cps")) {
3048 // Split out any imod code.
3050 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
3051 .Case("ie", ARM_PROC::IE)
3052 .Case("id", ARM_PROC::ID)
3055 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
3056 ProcessorIMod = IMod;
3060 // The "it" instruction has the condition mask on the end of the mnemonic.
3061 if (Mnemonic.startswith("it")) {
3062 ITMask = Mnemonic.slice(2, Mnemonic.size());
3063 Mnemonic = Mnemonic.slice(0, 2);
3069 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
3070 /// inclusion of carry set or predication code operands.
3072 // FIXME: It would be nice to autogen this.
3074 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
3075 bool &CanAcceptPredicationCode) {
3076 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
3077 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
3078 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
3079 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
3080 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
3081 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
3082 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
3083 Mnemonic == "eor" || Mnemonic == "smlal" || Mnemonic == "neg" ||
3084 (Mnemonic == "mov" && !isThumb())) {
3085 CanAcceptCarrySet = true;
3087 CanAcceptCarrySet = false;
3090 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
3091 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
3092 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
3093 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
3094 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "setend" ||
3095 (Mnemonic == "clrex" && !isThumb()) ||
3096 (Mnemonic == "nop" && isThumbOne()) ||
3097 ((Mnemonic == "pld" || Mnemonic == "pli" || Mnemonic == "pldw") &&
3099 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs")) &&
3101 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
3102 CanAcceptPredicationCode = false;
3104 CanAcceptPredicationCode = true;
3108 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
3109 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
3110 CanAcceptPredicationCode = false;
3113 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
3114 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3115 // FIXME: This is all horribly hacky. We really need a better way to deal
3116 // with optional operands like this in the matcher table.
3118 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
3119 // another does not. Specifically, the MOVW instruction does not. So we
3120 // special case it here and remove the defaulted (non-setting) cc_out
3121 // operand if that's the instruction we're trying to match.
3123 // We do this as post-processing of the explicit operands rather than just
3124 // conditionally adding the cc_out in the first place because we need
3125 // to check the type of the parsed immediate operand.
3126 if (Mnemonic == "mov" && Operands.size() > 4 &&
3127 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
3128 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
3129 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3132 // Register-register 'add' for thumb does not have a cc_out operand
3133 // when there are only two register operands.
3134 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
3135 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3136 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3137 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3139 // Register-register 'add' for thumb does not have a cc_out operand
3140 // when it's an ADD Rdm, SP, {Rdm|#imm0_255} instruction. We do
3141 // have to check the immediate range here since Thumb2 has a variant
3142 // that can handle a different range and has a cc_out operand.
3143 if (isThumb() && Mnemonic == "add" && Operands.size() == 6 &&
3144 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3145 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3146 static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::SP &&
3147 static_cast<ARMOperand*>(Operands[1])->getReg() == 0 &&
3148 (static_cast<ARMOperand*>(Operands[5])->isReg() ||
3149 static_cast<ARMOperand*>(Operands[5])->isImm0_1020s4()))
3151 // For Thumb2, add immediate does not have a cc_out operand for the
3152 // imm0_4096 variant. That's the least-preferred variant when
3153 // selecting via the generic "add" mnemonic, so to know that we
3154 // should remove the cc_out operand, we have to explicitly check that
3155 // it's not one of the other variants. Ugh.
3156 if (isThumbTwo() && Mnemonic == "add" && Operands.size() == 6 &&
3157 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3158 static_cast<ARMOperand*>(Operands[4])->isReg() &&
3159 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3160 // Nest conditions rather than one big 'if' statement for readability.
3162 // If either register is a high reg, it's either one of the SP
3163 // variants (handled above) or a 32-bit encoding, so we just
3164 // check against T3.
3165 if ((!isARMLowRegister(static_cast<ARMOperand*>(Operands[3])->getReg()) ||
3166 !isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg())) &&
3167 static_cast<ARMOperand*>(Operands[5])->isT2SOImm())
3169 // If both registers are low, we're in an IT block, and the immediate is
3170 // in range, we should use encoding T1 instead, which has a cc_out.
3172 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
3173 isARMLowRegister(static_cast<ARMOperand*>(Operands[4])->getReg()) &&
3174 static_cast<ARMOperand*>(Operands[5])->isImm0_7())
3177 // Otherwise, we use encoding T4, which does not have a cc_out
3183 // Register-register 'add/sub' for thumb does not have a cc_out operand
3184 // when it's an ADD/SUB SP, #imm. Be lenient on count since there's also
3185 // the "add/sub SP, SP, #imm" version. If the follow-up operands aren't
3186 // right, this will result in better diagnostics (which operand is off)
3188 if (isThumb() && (Mnemonic == "add" || Mnemonic == "sub") &&
3189 (Operands.size() == 5 || Operands.size() == 6) &&
3190 static_cast<ARMOperand*>(Operands[3])->isReg() &&
3191 static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::SP &&
3192 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
3198 /// Parse an arm instruction mnemonic followed by its operands.
3199 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
3200 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3201 // Create the leading tokens for the mnemonic, split by '.' characters.
3202 size_t Start = 0, Next = Name.find('.');
3203 StringRef Mnemonic = Name.slice(Start, Next);
3205 // Split out the predication code and carry setting flag from the mnemonic.
3206 unsigned PredicationCode;
3207 unsigned ProcessorIMod;
3210 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
3211 ProcessorIMod, ITMask);
3213 // In Thumb1, only the branch (B) instruction can be predicated.
3214 if (isThumbOne() && PredicationCode != ARMCC::AL && Mnemonic != "b") {
3215 Parser.EatToEndOfStatement();
3216 return Error(NameLoc, "conditional execution not supported in Thumb1");
3219 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
3221 // Handle the IT instruction ITMask. Convert it to a bitmask. This
3222 // is the mask as it will be for the IT encoding if the conditional
3223 // encoding has a '1' as it's bit0 (i.e. 't' ==> '1'). In the case
3224 // where the conditional bit0 is zero, the instruction post-processing
3225 // will adjust the mask accordingly.
3226 if (Mnemonic == "it") {
3227 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + 2);
3228 if (ITMask.size() > 3) {
3229 Parser.EatToEndOfStatement();
3230 return Error(Loc, "too many conditions on IT instruction");
3233 for (unsigned i = ITMask.size(); i != 0; --i) {
3234 char pos = ITMask[i - 1];
3235 if (pos != 't' && pos != 'e') {
3236 Parser.EatToEndOfStatement();
3237 return Error(Loc, "illegal IT block condition mask '" + ITMask + "'");
3240 if (ITMask[i - 1] == 't')
3243 Operands.push_back(ARMOperand::CreateITMask(Mask, Loc));
3246 // FIXME: This is all a pretty gross hack. We should automatically handle
3247 // optional operands like this via tblgen.
3249 // Next, add the CCOut and ConditionCode operands, if needed.
3251 // For mnemonics which can ever incorporate a carry setting bit or predication
3252 // code, our matching model involves us always generating CCOut and
3253 // ConditionCode operands to match the mnemonic "as written" and then we let
3254 // the matcher deal with finding the right instruction or generating an
3255 // appropriate error.
3256 bool CanAcceptCarrySet, CanAcceptPredicationCode;
3257 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
3259 // If we had a carry-set on an instruction that can't do that, issue an
3261 if (!CanAcceptCarrySet && CarrySetting) {
3262 Parser.EatToEndOfStatement();
3263 return Error(NameLoc, "instruction '" + Mnemonic +
3264 "' can not set flags, but 's' suffix specified");
3266 // If we had a predication code on an instruction that can't do that, issue an
3268 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
3269 Parser.EatToEndOfStatement();
3270 return Error(NameLoc, "instruction '" + Mnemonic +
3271 "' is not predicable, but condition code specified");
3274 // Add the carry setting operand, if necessary.
3275 if (CanAcceptCarrySet) {
3276 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size());
3277 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
3281 // Add the predication code operand, if necessary.
3282 if (CanAcceptPredicationCode) {
3283 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Mnemonic.size() +
3285 Operands.push_back(ARMOperand::CreateCondCode(
3286 ARMCC::CondCodes(PredicationCode), Loc));
3289 // Add the processor imod operand, if necessary.
3290 if (ProcessorIMod) {
3291 Operands.push_back(ARMOperand::CreateImm(
3292 MCConstantExpr::Create(ProcessorIMod, getContext()),
3296 // Add the remaining tokens in the mnemonic.
3297 while (Next != StringRef::npos) {
3299 Next = Name.find('.', Start + 1);
3300 StringRef ExtraToken = Name.slice(Start, Next);
3302 // For now, we're only parsing Thumb1 (for the most part), so
3303 // just ignore ".n" qualifiers. We'll use them to restrict
3304 // matching when we do Thumb2.
3305 if (ExtraToken != ".n") {
3306 SMLoc Loc = SMLoc::getFromPointer(NameLoc.getPointer() + Start);
3307 Operands.push_back(ARMOperand::CreateToken(ExtraToken, Loc));
3311 // Read the remaining operands.
3312 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3313 // Read the first operand.
3314 if (parseOperand(Operands, Mnemonic)) {
3315 Parser.EatToEndOfStatement();
3319 while (getLexer().is(AsmToken::Comma)) {
3320 Parser.Lex(); // Eat the comma.
3322 // Parse and remember the operand.
3323 if (parseOperand(Operands, Mnemonic)) {
3324 Parser.EatToEndOfStatement();
3330 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3331 Parser.EatToEndOfStatement();
3332 return TokError("unexpected token in argument list");
3335 Parser.Lex(); // Consume the EndOfStatement
3337 // Some instructions, mostly Thumb, have forms for the same mnemonic that
3338 // do and don't have a cc_out optional-def operand. With some spot-checks
3339 // of the operand list, we can figure out which variant we're trying to
3340 // parse and adjust accordingly before actually matching. We shouldn't ever
3341 // try to remove a cc_out operand that was explicitly set on the the
3342 // mnemonic, of course (CarrySetting == true). Reason number #317 the
3343 // table driven matcher doesn't fit well with the ARM instruction set.
3344 if (!CarrySetting && shouldOmitCCOutOperand(Mnemonic, Operands)) {
3345 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3346 Operands.erase(Operands.begin() + 1);
3350 // ARM mode 'blx' need special handling, as the register operand version
3351 // is predicable, but the label operand version is not. So, we can't rely
3352 // on the Mnemonic based checking to correctly figure out when to put
3353 // a CondCode operand in the list. If we're trying to match the label
3354 // version, remove the CondCode operand here.
3355 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
3356 static_cast<ARMOperand*>(Operands[2])->isImm()) {
3357 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3358 Operands.erase(Operands.begin() + 1);
3362 // The vector-compare-to-zero instructions have a literal token "#0" at
3363 // the end that comes to here as an immediate operand. Convert it to a
3364 // token to play nicely with the matcher.
3365 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
3366 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
3367 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3368 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3369 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3370 if (CE && CE->getValue() == 0) {
3371 Operands.erase(Operands.begin() + 5);
3372 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3376 // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
3377 // end. Convert it to a token here.
3378 if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
3379 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3380 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3381 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3382 if (CE && CE->getValue() == 0) {
3383 Operands.erase(Operands.begin() + 5);
3384 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3392 // Validate context-sensitive operand constraints.
3394 // return 'true' if register list contains non-low GPR registers,
3395 // 'false' otherwise. If Reg is in the register list or is HiReg, set
3396 // 'containsReg' to true.
3397 static bool checkLowRegisterList(MCInst Inst, unsigned OpNo, unsigned Reg,
3398 unsigned HiReg, bool &containsReg) {
3399 containsReg = false;
3400 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
3401 unsigned OpReg = Inst.getOperand(i).getReg();
3404 // Anything other than a low register isn't legal here.
3405 if (!isARMLowRegister(OpReg) && (!HiReg || OpReg != HiReg))
3411 // Check if the specified regisgter is in the register list of the inst,
3412 // starting at the indicated operand number.
3413 static bool listContainsReg(MCInst &Inst, unsigned OpNo, unsigned Reg) {
3414 for (unsigned i = OpNo; i < Inst.getNumOperands(); ++i) {
3415 unsigned OpReg = Inst.getOperand(i).getReg();
3422 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3423 // the ARMInsts array) instead. Getting that here requires awkward
3424 // API changes, though. Better way?
3426 extern MCInstrDesc ARMInsts[];
3428 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3429 return ARMInsts[Opcode];
3432 // FIXME: We would really like to be able to tablegen'erate this.
3434 validateInstruction(MCInst &Inst,
3435 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3436 MCInstrDesc &MCID = getInstDesc(Inst.getOpcode());
3437 SMLoc Loc = Operands[0]->getStartLoc();
3438 // Check the IT block state first.
3441 if (ITState.FirstCond)
3442 ITState.FirstCond = false;
3444 bit = (ITState.Mask >> (5 - ITState.CurPosition)) & 1;
3445 // The instruction must be predicable.
3446 if (!MCID.isPredicable())
3447 return Error(Loc, "instructions in IT block must be predicable");
3448 unsigned Cond = Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm();
3449 unsigned ITCond = bit ? ITState.Cond :
3450 ARMCC::getOppositeCondition(ITState.Cond);
3451 if (Cond != ITCond) {
3452 // Find the condition code Operand to get its SMLoc information.
3454 for (unsigned i = 1; i < Operands.size(); ++i)
3455 if (static_cast<ARMOperand*>(Operands[i])->isCondCode())
3456 CondLoc = Operands[i]->getStartLoc();
3457 return Error(CondLoc, "incorrect condition in IT block; got '" +
3458 StringRef(ARMCondCodeToString(ARMCC::CondCodes(Cond))) +
3459 "', but expected '" +
3460 ARMCondCodeToString(ARMCC::CondCodes(ITCond)) + "'");
3462 // Check for non-'al' condition codes outside of the IT block.
3463 } else if (isThumbTwo() && MCID.isPredicable() &&
3464 Inst.getOperand(MCID.findFirstPredOperandIdx()).getImm() !=
3465 ARMCC::AL && Inst.getOpcode() != ARM::tBcc &&
3466 Inst.getOpcode() != ARM::t2Bcc)
3467 return Error(Loc, "predicated instructions must be in IT block");
3469 switch (Inst.getOpcode()) {
3472 case ARM::LDRD_POST:
3474 // Rt2 must be Rt + 1.
3475 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3476 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3478 return Error(Operands[3]->getStartLoc(),
3479 "destination operands must be sequential");
3483 // Rt2 must be Rt + 1.
3484 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3485 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3487 return Error(Operands[3]->getStartLoc(),
3488 "source operands must be sequential");
3492 case ARM::STRD_POST:
3494 // Rt2 must be Rt + 1.
3495 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3496 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3498 return Error(Operands[3]->getStartLoc(),
3499 "source operands must be sequential");
3504 // width must be in range [1, 32-lsb]
3505 unsigned lsb = Inst.getOperand(2).getImm();
3506 unsigned widthm1 = Inst.getOperand(3).getImm();
3507 if (widthm1 >= 32 - lsb)
3508 return Error(Operands[5]->getStartLoc(),
3509 "bitfield width must be in range [1,32-lsb]");
3513 // If we're parsing Thumb2, the .w variant is available and handles
3514 // most cases that are normally illegal for a Thumb1 LDM
3515 // instruction. We'll make the transformation in processInstruction()
3518 // Thumb LDM instructions are writeback iff the base register is not
3519 // in the register list.
3520 unsigned Rn = Inst.getOperand(0).getReg();
3521 bool hasWritebackToken =
3522 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
3523 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
3524 bool listContainsBase;
3525 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) && !isThumbTwo())
3526 return Error(Operands[3 + hasWritebackToken]->getStartLoc(),
3527 "registers must be in range r0-r7");
3528 // If we should have writeback, then there should be a '!' token.
3529 if (!listContainsBase && !hasWritebackToken && !isThumbTwo())
3530 return Error(Operands[2]->getStartLoc(),
3531 "writeback operator '!' expected");
3532 // If we should not have writeback, there must not be a '!'. This is
3533 // true even for the 32-bit wide encodings.
3534 if (listContainsBase && hasWritebackToken)
3535 return Error(Operands[3]->getStartLoc(),
3536 "writeback operator '!' not allowed when base register "
3537 "in register list");
3541 case ARM::t2LDMIA_UPD: {
3542 if (listContainsReg(Inst, 3, Inst.getOperand(0).getReg()))
3543 return Error(Operands[4]->getStartLoc(),
3544 "writeback operator '!' not allowed when base register "
3545 "in register list");
3549 bool listContainsBase;
3550 if (checkLowRegisterList(Inst, 3, 0, ARM::PC, listContainsBase))
3551 return Error(Operands[2]->getStartLoc(),
3552 "registers must be in range r0-r7 or pc");
3556 bool listContainsBase;
3557 if (checkLowRegisterList(Inst, 3, 0, ARM::LR, listContainsBase))
3558 return Error(Operands[2]->getStartLoc(),
3559 "registers must be in range r0-r7 or lr");
3562 case ARM::tSTMIA_UPD: {
3563 bool listContainsBase;
3564 if (checkLowRegisterList(Inst, 4, 0, 0, listContainsBase))
3565 return Error(Operands[4]->getStartLoc(),
3566 "registers must be in range r0-r7");
3575 processInstruction(MCInst &Inst,
3576 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3577 switch (Inst.getOpcode()) {
3578 case ARM::LDMIA_UPD:
3579 // If this is a load of a single register via a 'pop', then we should use
3580 // a post-indexed LDR instruction instead, per the ARM ARM.
3581 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3582 Inst.getNumOperands() == 5) {
3584 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3585 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3586 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3587 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3588 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3589 TmpInst.addOperand(MCOperand::CreateImm(4));
3590 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3591 TmpInst.addOperand(Inst.getOperand(3));
3595 case ARM::STMDB_UPD:
3596 // If this is a store of a single register via a 'push', then we should use
3597 // a pre-indexed STR instruction instead, per the ARM ARM.
3598 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3599 Inst.getNumOperands() == 5) {
3601 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3602 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3603 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3604 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3605 TmpInst.addOperand(MCOperand::CreateImm(-4));
3606 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3607 TmpInst.addOperand(Inst.getOperand(3));
3612 // If the immediate is in the range 0-7, we want tADDi3 iff Rd was
3613 // explicitly specified. From the ARM ARM: "Encoding T1 is preferred
3614 // to encoding T2 if <Rd> is specified and encoding T2 is preferred
3615 // to encoding T1 if <Rd> is omitted."
3616 if (Inst.getOperand(3).getImm() < 8 && Operands.size() == 6)
3617 Inst.setOpcode(ARM::tADDi3);
3620 // If the conditional is AL or we're in an IT block, we really want t2B.
3621 if (Inst.getOperand(1).getImm() == ARMCC::AL || inITBlock())
3622 Inst.setOpcode(ARM::t2B);
3625 // If the conditional is AL, we really want tB.
3626 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3627 Inst.setOpcode(ARM::tB);
3630 // If the register list contains any high registers, or if the writeback
3631 // doesn't match what tLDMIA can do, we need to use the 32-bit encoding
3632 // instead if we're in Thumb2. Otherwise, this should have generated
3633 // an error in validateInstruction().
3634 unsigned Rn = Inst.getOperand(0).getReg();
3635 bool hasWritebackToken =
3636 (static_cast<ARMOperand*>(Operands[3])->isToken() &&
3637 static_cast<ARMOperand*>(Operands[3])->getToken() == "!");
3638 bool listContainsBase;
3639 if (checkLowRegisterList(Inst, 3, Rn, 0, listContainsBase) ||
3640 (!listContainsBase && !hasWritebackToken) ||
3641 (listContainsBase && hasWritebackToken)) {
3642 // 16-bit encoding isn't sufficient. Switch to the 32-bit version.
3643 assert (isThumbTwo());
3644 Inst.setOpcode(hasWritebackToken ? ARM::t2LDMIA_UPD : ARM::t2LDMIA);
3645 // If we're switching to the updating version, we need to insert
3646 // the writeback tied operand.
3647 if (hasWritebackToken)
3648 Inst.insert(Inst.begin(),
3649 MCOperand::CreateReg(Inst.getOperand(0).getReg()));
3654 // The mask bits for all but the first condition are represented as
3655 // the low bit of the condition code value implies 't'. We currently
3656 // always have 1 implies 't', so XOR toggle the bits if the low bit
3657 // of the condition code is zero. The encoding also expects the low
3658 // bit of the condition to be encoded as bit 4 of the mask operand,
3659 // so mask that in if needed
3660 MCOperand &MO = Inst.getOperand(1);
3661 unsigned Mask = MO.getImm();
3662 unsigned OrigMask = Mask;
3663 unsigned TZ = CountTrailingZeros_32(Mask);
3664 if ((Inst.getOperand(0).getImm() & 1) == 0) {
3665 assert(Mask && TZ <= 3 && "illegal IT mask value!");
3666 for (unsigned i = 3; i != TZ; --i)
3672 // Set up the IT block state according to the IT instruction we just
3674 assert(!inITBlock() && "nested IT blocks?!");
3675 ITState.Cond = ARMCC::CondCodes(Inst.getOperand(0).getImm());
3676 ITState.Mask = OrigMask; // Use the original mask, not the updated one.
3677 ITState.CurPosition = 0;
3678 ITState.FirstCond = true;
3684 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3685 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3686 // suffix depending on whether they're in an IT block or not.
3687 unsigned Opc = Inst.getOpcode();
3688 MCInstrDesc &MCID = getInstDesc(Opc);
3689 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3690 assert(MCID.hasOptionalDef() &&
3691 "optionally flag setting instruction missing optional def operand");
3692 assert(MCID.NumOperands == Inst.getNumOperands() &&
3693 "operand count mismatch!");
3694 // Find the optional-def operand (cc_out).
3697 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3700 // If we're parsing Thumb1, reject it completely.
3701 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3702 return Match_MnemonicFail;
3703 // If we're parsing Thumb2, which form is legal depends on whether we're
3705 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR &&
3707 return Match_RequiresITBlock;
3708 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() == ARM::CPSR &&
3710 return Match_RequiresNotITBlock;
3712 // Some high-register supporting Thumb1 encodings only allow both registers
3713 // to be from r0-r7 when in Thumb2.
3714 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3715 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3716 isARMLowRegister(Inst.getOperand(2).getReg()))
3717 return Match_RequiresThumb2;
3718 // Others only require ARMv6 or later.
3719 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
3720 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3721 isARMLowRegister(Inst.getOperand(1).getReg()))
3722 return Match_RequiresV6;
3723 return Match_Success;
3727 MatchAndEmitInstruction(SMLoc IDLoc,
3728 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3732 unsigned MatchResult;
3733 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3734 switch (MatchResult) {
3737 // Context sensitive operand constraints aren't handled by the matcher,
3738 // so check them here.
3739 if (validateInstruction(Inst, Operands)) {
3740 // Still progress the IT block, otherwise one wrong condition causes
3741 // nasty cascading errors.
3742 forwardITPosition();
3746 // Some instructions need post-processing to, for example, tweak which
3747 // encoding is selected.
3748 processInstruction(Inst, Operands);
3750 // Only move forward at the very end so that everything in validate
3751 // and process gets a consistent answer about whether we're in an IT
3753 forwardITPosition();
3755 Out.EmitInstruction(Inst);
3757 case Match_MissingFeature:
3758 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3760 case Match_InvalidOperand: {
3761 SMLoc ErrorLoc = IDLoc;
3762 if (ErrorInfo != ~0U) {
3763 if (ErrorInfo >= Operands.size())
3764 return Error(IDLoc, "too few operands for instruction");
3766 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3767 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3770 return Error(ErrorLoc, "invalid operand for instruction");
3772 case Match_MnemonicFail:
3773 return Error(IDLoc, "invalid instruction");
3774 case Match_ConversionFail:
3775 // The converter function will have already emited a diagnostic.
3777 case Match_RequiresNotITBlock:
3778 return Error(IDLoc, "flag setting instruction only valid outside IT block");
3779 case Match_RequiresITBlock:
3780 return Error(IDLoc, "instruction only valid inside IT block");
3781 case Match_RequiresV6:
3782 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3783 case Match_RequiresThumb2:
3784 return Error(IDLoc, "instruction variant requires Thumb2");
3787 llvm_unreachable("Implement any new match types added!");
3791 /// parseDirective parses the arm specific directives
3792 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3793 StringRef IDVal = DirectiveID.getIdentifier();
3794 if (IDVal == ".word")
3795 return parseDirectiveWord(4, DirectiveID.getLoc());
3796 else if (IDVal == ".thumb")
3797 return parseDirectiveThumb(DirectiveID.getLoc());
3798 else if (IDVal == ".thumb_func")
3799 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3800 else if (IDVal == ".code")
3801 return parseDirectiveCode(DirectiveID.getLoc());
3802 else if (IDVal == ".syntax")
3803 return parseDirectiveSyntax(DirectiveID.getLoc());
3807 /// parseDirectiveWord
3808 /// ::= .word [ expression (, expression)* ]
3809 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3810 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3812 const MCExpr *Value;
3813 if (getParser().ParseExpression(Value))
3816 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3818 if (getLexer().is(AsmToken::EndOfStatement))
3821 // FIXME: Improve diagnostic.
3822 if (getLexer().isNot(AsmToken::Comma))
3823 return Error(L, "unexpected token in directive");
3832 /// parseDirectiveThumb
3834 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3835 if (getLexer().isNot(AsmToken::EndOfStatement))
3836 return Error(L, "unexpected token in directive");
3839 // TODO: set thumb mode
3840 // TODO: tell the MC streamer the mode
3841 // getParser().getStreamer().Emit???();
3845 /// parseDirectiveThumbFunc
3846 /// ::= .thumbfunc symbol_name
3847 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3848 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3849 bool isMachO = MAI.hasSubsectionsViaSymbols();
3852 // Darwin asm has function name after .thumb_func direction
3855 const AsmToken &Tok = Parser.getTok();
3856 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3857 return Error(L, "unexpected token in .thumb_func directive");
3858 Name = Tok.getString();
3859 Parser.Lex(); // Consume the identifier token.
3862 if (getLexer().isNot(AsmToken::EndOfStatement))
3863 return Error(L, "unexpected token in directive");
3866 // FIXME: assuming function name will be the line following .thumb_func
3868 Name = Parser.getTok().getString();
3871 // Mark symbol as a thumb symbol.
3872 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3873 getParser().getStreamer().EmitThumbFunc(Func);
3877 /// parseDirectiveSyntax
3878 /// ::= .syntax unified | divided
3879 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3880 const AsmToken &Tok = Parser.getTok();
3881 if (Tok.isNot(AsmToken::Identifier))
3882 return Error(L, "unexpected token in .syntax directive");
3883 StringRef Mode = Tok.getString();
3884 if (Mode == "unified" || Mode == "UNIFIED")
3886 else if (Mode == "divided" || Mode == "DIVIDED")
3887 return Error(L, "'.syntax divided' arm asssembly not supported");
3889 return Error(L, "unrecognized syntax mode in .syntax directive");
3891 if (getLexer().isNot(AsmToken::EndOfStatement))
3892 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3895 // TODO tell the MC streamer the mode
3896 // getParser().getStreamer().Emit???();
3900 /// parseDirectiveCode
3901 /// ::= .code 16 | 32
3902 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3903 const AsmToken &Tok = Parser.getTok();
3904 if (Tok.isNot(AsmToken::Integer))
3905 return Error(L, "unexpected token in .code directive");
3906 int64_t Val = Parser.getTok().getIntVal();
3912 return Error(L, "invalid operand to .code directive");
3914 if (getLexer().isNot(AsmToken::EndOfStatement))
3915 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3921 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3925 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3931 extern "C" void LLVMInitializeARMAsmLexer();
3933 /// Force static initialization.
3934 extern "C" void LLVMInitializeARMAsmParser() {
3935 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3936 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3937 LLVMInitializeARMAsmLexer();
3940 #define GET_REGISTER_MATCHER
3941 #define GET_MATCHER_IMPLEMENTATION
3942 #include "ARMGenAsmMatcher.inc"