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/MCRegisterInfo.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/MC/MCTargetAsmParser.h"
24 #include "llvm/Target/TargetRegistry.h"
25 #include "llvm/Support/SourceMgr.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include "llvm/ADT/OwningPtr.h"
28 #include "llvm/ADT/STLExtras.h"
29 #include "llvm/ADT/SmallVector.h"
30 #include "llvm/ADT/StringExtras.h"
31 #include "llvm/ADT/StringSwitch.h"
32 #include "llvm/ADT/Twine.h"
40 class ARMAsmParser : public MCTargetAsmParser {
44 MCAsmParser &getParser() const { return Parser; }
45 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
47 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
48 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
50 int tryParseRegister();
51 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
52 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
53 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
54 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
55 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
56 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
57 const MCExpr *applyPrefixToExpr(const MCExpr *E,
58 MCSymbolRefExpr::VariantKind Variant);
61 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
62 unsigned &ShiftAmount);
63 bool parseDirectiveWord(unsigned Size, SMLoc L);
64 bool parseDirectiveThumb(SMLoc L);
65 bool parseDirectiveThumbFunc(SMLoc L);
66 bool parseDirectiveCode(SMLoc L);
67 bool parseDirectiveSyntax(SMLoc L);
69 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
70 bool &CarrySetting, unsigned &ProcessorIMod);
71 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
72 bool &CanAcceptPredicationCode);
74 bool isThumb() const {
75 // FIXME: Can tablegen auto-generate this?
76 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
78 bool isThumbOne() const {
79 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
81 bool isThumbTwo() const {
82 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2);
84 bool hasV6Ops() const {
85 return STI.getFeatureBits() & ARM::HasV6Ops;
88 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
89 setAvailableFeatures(FB);
92 /// @name Auto-generated Match Functions
95 #define GET_ASSEMBLER_HEADER
96 #include "ARMGenAsmMatcher.inc"
100 OperandMatchResultTy parseCoprocNumOperand(
101 SmallVectorImpl<MCParsedAsmOperand*>&);
102 OperandMatchResultTy parseCoprocRegOperand(
103 SmallVectorImpl<MCParsedAsmOperand*>&);
104 OperandMatchResultTy parseMemBarrierOptOperand(
105 SmallVectorImpl<MCParsedAsmOperand*>&);
106 OperandMatchResultTy parseProcIFlagsOperand(
107 SmallVectorImpl<MCParsedAsmOperand*>&);
108 OperandMatchResultTy parseMSRMaskOperand(
109 SmallVectorImpl<MCParsedAsmOperand*>&);
110 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
111 StringRef Op, int Low, int High);
112 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
113 return parsePKHImm(O, "lsl", 0, 31);
115 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
116 return parsePKHImm(O, "asr", 1, 32);
118 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
119 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
120 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
121 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
122 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
123 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
125 // Asm Match Converter Methods
126 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
127 const SmallVectorImpl<MCParsedAsmOperand*> &);
128 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
129 const SmallVectorImpl<MCParsedAsmOperand*> &);
130 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
131 const SmallVectorImpl<MCParsedAsmOperand*> &);
132 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
133 const SmallVectorImpl<MCParsedAsmOperand*> &);
134 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
135 const SmallVectorImpl<MCParsedAsmOperand*> &);
136 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
137 const SmallVectorImpl<MCParsedAsmOperand*> &);
138 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
139 const SmallVectorImpl<MCParsedAsmOperand*> &);
140 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
141 const SmallVectorImpl<MCParsedAsmOperand*> &);
142 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
143 const SmallVectorImpl<MCParsedAsmOperand*> &);
144 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
145 const SmallVectorImpl<MCParsedAsmOperand*> &);
146 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
147 const SmallVectorImpl<MCParsedAsmOperand*> &);
149 bool validateInstruction(MCInst &Inst,
150 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
151 void processInstruction(MCInst &Inst,
152 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
153 bool shouldOmitCCOutOperand(StringRef Mnemonic,
154 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
157 enum ARMMatchResultTy {
158 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
163 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
164 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
165 MCAsmParserExtension::Initialize(_Parser);
167 // Initialize the set of available features.
168 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
171 // Implementation of the MCTargetAsmParser interface:
172 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
173 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
174 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
175 bool ParseDirective(AsmToken DirectiveID);
177 unsigned checkTargetMatchPredicate(MCInst &Inst);
179 bool MatchAndEmitInstruction(SMLoc IDLoc,
180 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
183 } // end anonymous namespace
187 /// ARMOperand - Instances of this class represent a parsed ARM machine
189 class ARMOperand : public MCParsedAsmOperand {
213 SMLoc StartLoc, EndLoc;
214 SmallVector<unsigned, 8> Registers;
218 ARMCC::CondCodes Val;
230 ARM_PROC::IFlags Val;
250 /// Combined record for all forms of ARM address expressions.
253 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
255 const MCConstantExpr *OffsetImm; // Offset immediate value
256 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
257 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
258 unsigned ShiftImm; // shift for OffsetReg.
259 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
265 ARM_AM::ShiftOpc ShiftTy;
274 ARM_AM::ShiftOpc ShiftTy;
280 ARM_AM::ShiftOpc ShiftTy;
293 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
295 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
297 StartLoc = o.StartLoc;
311 case DPRRegisterList:
312 case SPRRegisterList:
313 Registers = o.Registers;
328 case PostIndexRegister:
329 PostIdxReg = o.PostIdxReg;
337 case ShifterImmediate:
338 ShifterImm = o.ShifterImm;
340 case ShiftedRegister:
341 RegShiftedReg = o.RegShiftedReg;
343 case ShiftedImmediate:
344 RegShiftedImm = o.RegShiftedImm;
346 case RotateImmediate:
349 case BitfieldDescriptor:
350 Bitfield = o.Bitfield;
355 /// getStartLoc - Get the location of the first token of this operand.
356 SMLoc getStartLoc() const { return StartLoc; }
357 /// getEndLoc - Get the location of the last token of this operand.
358 SMLoc getEndLoc() const { return EndLoc; }
360 ARMCC::CondCodes getCondCode() const {
361 assert(Kind == CondCode && "Invalid access!");
365 unsigned getCoproc() const {
366 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
370 StringRef getToken() const {
371 assert(Kind == Token && "Invalid access!");
372 return StringRef(Tok.Data, Tok.Length);
375 unsigned getReg() const {
376 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
380 const SmallVectorImpl<unsigned> &getRegList() const {
381 assert((Kind == RegisterList || Kind == DPRRegisterList ||
382 Kind == SPRRegisterList) && "Invalid access!");
386 const MCExpr *getImm() const {
387 assert(Kind == Immediate && "Invalid access!");
391 ARM_MB::MemBOpt getMemBarrierOpt() const {
392 assert(Kind == MemBarrierOpt && "Invalid access!");
396 ARM_PROC::IFlags getProcIFlags() const {
397 assert(Kind == ProcIFlags && "Invalid access!");
401 unsigned getMSRMask() const {
402 assert(Kind == MSRMask && "Invalid access!");
406 bool isCoprocNum() const { return Kind == CoprocNum; }
407 bool isCoprocReg() const { return Kind == CoprocReg; }
408 bool isCondCode() const { return Kind == CondCode; }
409 bool isCCOut() const { return Kind == CCOut; }
410 bool isImm() const { return Kind == Immediate; }
411 bool isImm0_255() const {
412 if (Kind != Immediate)
414 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
415 if (!CE) return false;
416 int64_t Value = CE->getValue();
417 return Value >= 0 && Value < 256;
419 bool isImm0_7() const {
420 if (Kind != Immediate)
422 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
423 if (!CE) return false;
424 int64_t Value = CE->getValue();
425 return Value >= 0 && Value < 8;
427 bool isImm0_15() const {
428 if (Kind != Immediate)
430 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
431 if (!CE) return false;
432 int64_t Value = CE->getValue();
433 return Value >= 0 && Value < 16;
435 bool isImm0_31() const {
436 if (Kind != Immediate)
438 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
439 if (!CE) return false;
440 int64_t Value = CE->getValue();
441 return Value >= 0 && Value < 32;
443 bool isImm1_16() const {
444 if (Kind != Immediate)
446 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
447 if (!CE) return false;
448 int64_t Value = CE->getValue();
449 return Value > 0 && Value < 17;
451 bool isImm1_32() const {
452 if (Kind != Immediate)
454 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
455 if (!CE) return false;
456 int64_t Value = CE->getValue();
457 return Value > 0 && Value < 33;
459 bool isImm0_65535() const {
460 if (Kind != Immediate)
462 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
463 if (!CE) return false;
464 int64_t Value = CE->getValue();
465 return Value >= 0 && Value < 65536;
467 bool isImm0_65535Expr() const {
468 if (Kind != Immediate)
470 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
471 // If it's not a constant expression, it'll generate a fixup and be
473 if (!CE) return true;
474 int64_t Value = CE->getValue();
475 return Value >= 0 && Value < 65536;
477 bool isImm24bit() const {
478 if (Kind != Immediate)
480 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
481 if (!CE) return false;
482 int64_t Value = CE->getValue();
483 return Value >= 0 && Value <= 0xffffff;
485 bool isImmThumbSR() const {
486 if (Kind != Immediate)
488 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
489 if (!CE) return false;
490 int64_t Value = CE->getValue();
491 return Value > 0 && Value < 33;
493 bool isPKHLSLImm() const {
494 if (Kind != Immediate)
496 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
497 if (!CE) return false;
498 int64_t Value = CE->getValue();
499 return Value >= 0 && Value < 32;
501 bool isPKHASRImm() const {
502 if (Kind != Immediate)
504 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
505 if (!CE) return false;
506 int64_t Value = CE->getValue();
507 return Value > 0 && Value <= 32;
509 bool isARMSOImm() const {
510 if (Kind != Immediate)
512 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
513 if (!CE) return false;
514 int64_t Value = CE->getValue();
515 return ARM_AM::getSOImmVal(Value) != -1;
517 bool isT2SOImm() const {
518 if (Kind != Immediate)
520 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
521 if (!CE) return false;
522 int64_t Value = CE->getValue();
523 return ARM_AM::getT2SOImmVal(Value) != -1;
525 bool isSetEndImm() const {
526 if (Kind != Immediate)
528 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
529 if (!CE) return false;
530 int64_t Value = CE->getValue();
531 return Value == 1 || Value == 0;
533 bool isReg() const { return Kind == Register; }
534 bool isRegList() const { return Kind == RegisterList; }
535 bool isDPRRegList() const { return Kind == DPRRegisterList; }
536 bool isSPRRegList() const { return Kind == SPRRegisterList; }
537 bool isToken() const { return Kind == Token; }
538 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
539 bool isMemory() const { return Kind == Memory; }
540 bool isShifterImm() const { return Kind == ShifterImmediate; }
541 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
542 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
543 bool isRotImm() const { return Kind == RotateImmediate; }
544 bool isBitfield() const { return Kind == BitfieldDescriptor; }
545 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
546 bool isPostIdxReg() const {
547 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
549 bool isMemNoOffset() const {
552 // No offset of any kind.
553 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
555 bool isAddrMode2() const {
558 // Check for register offset.
559 if (Mem.OffsetRegNum) return true;
560 // Immediate offset in range [-4095, 4095].
561 if (!Mem.OffsetImm) return true;
562 int64_t Val = Mem.OffsetImm->getValue();
563 return Val > -4096 && Val < 4096;
565 bool isAM2OffsetImm() const {
566 if (Kind != Immediate)
568 // Immediate offset in range [-4095, 4095].
569 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
570 if (!CE) return false;
571 int64_t Val = CE->getValue();
572 return Val > -4096 && Val < 4096;
574 bool isAddrMode3() const {
577 // No shifts are legal for AM3.
578 if (Mem.ShiftType != ARM_AM::no_shift) return false;
579 // Check for register offset.
580 if (Mem.OffsetRegNum) return true;
581 // Immediate offset in range [-255, 255].
582 if (!Mem.OffsetImm) return true;
583 int64_t Val = Mem.OffsetImm->getValue();
584 return Val > -256 && Val < 256;
586 bool isAM3Offset() const {
587 if (Kind != Immediate && Kind != PostIndexRegister)
589 if (Kind == PostIndexRegister)
590 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
591 // Immediate offset in range [-255, 255].
592 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
593 if (!CE) return false;
594 int64_t Val = CE->getValue();
595 // Special case, #-0 is INT32_MIN.
596 return (Val > -256 && Val < 256) || Val == INT32_MIN;
598 bool isAddrMode5() const {
601 // Check for register offset.
602 if (Mem.OffsetRegNum) return false;
603 // Immediate offset in range [-1020, 1020] and a multiple of 4.
604 if (!Mem.OffsetImm) return true;
605 int64_t Val = Mem.OffsetImm->getValue();
606 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
608 bool isMemRegOffset() const {
609 if (Kind != Memory || !Mem.OffsetRegNum)
613 bool isMemThumbRR() const {
614 // Thumb reg+reg addressing is simple. Just two registers, a base and
615 // an offset. No shifts, negations or any other complicating factors.
616 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
617 Mem.ShiftType != ARM_AM::no_shift)
619 return isARMLowRegister(Mem.BaseRegNum) &&
620 (!Mem.OffsetRegNum || isARMLowRegister(Mem.OffsetRegNum));
622 bool isMemThumbRIs4() const {
623 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
624 !isARMLowRegister(Mem.BaseRegNum))
626 // Immediate offset, multiple of 4 in range [0, 124].
627 if (!Mem.OffsetImm) return true;
628 int64_t Val = Mem.OffsetImm->getValue();
629 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
631 bool isMemThumbSPI() const {
632 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
634 // Immediate offset, multiple of 4 in range [0, 1020].
635 if (!Mem.OffsetImm) return true;
636 int64_t Val = Mem.OffsetImm->getValue();
637 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
639 bool isMemImm8Offset() const {
640 if (Kind != Memory || Mem.OffsetRegNum != 0)
642 // Immediate offset in range [-255, 255].
643 if (!Mem.OffsetImm) return true;
644 int64_t Val = Mem.OffsetImm->getValue();
645 return Val > -256 && Val < 256;
647 bool isMemImm12Offset() const {
648 // If we have an immediate that's not a constant, treat it as a label
649 // reference needing a fixup. If it is a constant, it's something else
651 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
654 if (Kind != Memory || Mem.OffsetRegNum != 0)
656 // Immediate offset in range [-4095, 4095].
657 if (!Mem.OffsetImm) return true;
658 int64_t Val = Mem.OffsetImm->getValue();
659 return Val > -4096 && Val < 4096;
661 bool isPostIdxImm8() const {
662 if (Kind != Immediate)
664 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
665 if (!CE) return false;
666 int64_t Val = CE->getValue();
667 return Val > -256 && Val < 256;
670 bool isMSRMask() const { return Kind == MSRMask; }
671 bool isProcIFlags() const { return Kind == ProcIFlags; }
673 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
674 // Add as immediates when possible. Null MCExpr = 0.
676 Inst.addOperand(MCOperand::CreateImm(0));
677 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
678 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
680 Inst.addOperand(MCOperand::CreateExpr(Expr));
683 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
684 assert(N == 2 && "Invalid number of operands!");
685 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
686 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
687 Inst.addOperand(MCOperand::CreateReg(RegNum));
690 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
691 assert(N == 1 && "Invalid number of operands!");
692 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
695 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
696 assert(N == 1 && "Invalid number of operands!");
697 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
700 void addCCOutOperands(MCInst &Inst, unsigned N) const {
701 assert(N == 1 && "Invalid number of operands!");
702 Inst.addOperand(MCOperand::CreateReg(getReg()));
705 void addRegOperands(MCInst &Inst, unsigned N) const {
706 assert(N == 1 && "Invalid number of operands!");
707 Inst.addOperand(MCOperand::CreateReg(getReg()));
710 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
711 assert(N == 3 && "Invalid number of operands!");
712 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
713 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
714 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
715 Inst.addOperand(MCOperand::CreateImm(
716 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
719 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
720 assert(N == 2 && "Invalid number of operands!");
721 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
722 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
723 Inst.addOperand(MCOperand::CreateImm(
724 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
728 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
729 assert(N == 1 && "Invalid number of operands!");
730 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
734 void addRegListOperands(MCInst &Inst, unsigned N) const {
735 assert(N == 1 && "Invalid number of operands!");
736 const SmallVectorImpl<unsigned> &RegList = getRegList();
737 for (SmallVectorImpl<unsigned>::const_iterator
738 I = RegList.begin(), E = RegList.end(); I != E; ++I)
739 Inst.addOperand(MCOperand::CreateReg(*I));
742 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
743 addRegListOperands(Inst, N);
746 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
747 addRegListOperands(Inst, N);
750 void addRotImmOperands(MCInst &Inst, unsigned N) const {
751 assert(N == 1 && "Invalid number of operands!");
752 // Encoded as val>>3. The printer handles display as 8, 16, 24.
753 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
756 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
757 assert(N == 1 && "Invalid number of operands!");
758 // Munge the lsb/width into a bitfield mask.
759 unsigned lsb = Bitfield.LSB;
760 unsigned width = Bitfield.Width;
761 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
762 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
763 (32 - (lsb + width)));
764 Inst.addOperand(MCOperand::CreateImm(Mask));
767 void addImmOperands(MCInst &Inst, unsigned N) const {
768 assert(N == 1 && "Invalid number of operands!");
769 addExpr(Inst, getImm());
772 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
773 assert(N == 1 && "Invalid number of operands!");
774 addExpr(Inst, getImm());
777 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
778 assert(N == 1 && "Invalid number of operands!");
779 addExpr(Inst, getImm());
782 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
783 assert(N == 1 && "Invalid number of operands!");
784 addExpr(Inst, getImm());
787 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
788 assert(N == 1 && "Invalid number of operands!");
789 addExpr(Inst, getImm());
792 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
793 assert(N == 1 && "Invalid number of operands!");
794 // The constant encodes as the immediate-1, and we store in the instruction
795 // the bits as encoded, so subtract off one here.
796 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
797 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
800 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
801 assert(N == 1 && "Invalid number of operands!");
802 // The constant encodes as the immediate-1, and we store in the instruction
803 // the bits as encoded, so subtract off one here.
804 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
805 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
808 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
809 assert(N == 1 && "Invalid number of operands!");
810 addExpr(Inst, getImm());
813 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
814 assert(N == 1 && "Invalid number of operands!");
815 addExpr(Inst, getImm());
818 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
819 assert(N == 1 && "Invalid number of operands!");
820 addExpr(Inst, getImm());
823 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
824 assert(N == 1 && "Invalid number of operands!");
825 // The constant encodes as the immediate, except for 32, which encodes as
827 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
828 unsigned Imm = CE->getValue();
829 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
832 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
833 assert(N == 1 && "Invalid number of operands!");
834 addExpr(Inst, getImm());
837 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
838 assert(N == 1 && "Invalid number of operands!");
839 // An ASR value of 32 encodes as 0, so that's how we want to add it to
840 // the instruction as well.
841 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
842 int Val = CE->getValue();
843 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
846 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
847 assert(N == 1 && "Invalid number of operands!");
848 addExpr(Inst, getImm());
851 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
852 assert(N == 1 && "Invalid number of operands!");
853 addExpr(Inst, getImm());
856 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
857 assert(N == 1 && "Invalid number of operands!");
858 addExpr(Inst, getImm());
861 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
862 assert(N == 1 && "Invalid number of operands!");
863 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
866 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
867 assert(N == 1 && "Invalid number of operands!");
868 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
871 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
872 assert(N == 3 && "Invalid number of operands!");
873 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
874 if (!Mem.OffsetRegNum) {
875 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
876 // Special case for #-0
877 if (Val == INT32_MIN) Val = 0;
878 if (Val < 0) Val = -Val;
879 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
881 // For register offset, we encode the shift type and negation flag
883 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
884 Mem.ShiftImm, Mem.ShiftType);
886 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
887 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
888 Inst.addOperand(MCOperand::CreateImm(Val));
891 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
892 assert(N == 2 && "Invalid number of operands!");
893 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
894 assert(CE && "non-constant AM2OffsetImm operand!");
895 int32_t Val = CE->getValue();
896 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
897 // Special case for #-0
898 if (Val == INT32_MIN) Val = 0;
899 if (Val < 0) Val = -Val;
900 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
901 Inst.addOperand(MCOperand::CreateReg(0));
902 Inst.addOperand(MCOperand::CreateImm(Val));
905 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
906 assert(N == 3 && "Invalid number of operands!");
907 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
908 if (!Mem.OffsetRegNum) {
909 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
910 // Special case for #-0
911 if (Val == INT32_MIN) Val = 0;
912 if (Val < 0) Val = -Val;
913 Val = ARM_AM::getAM3Opc(AddSub, Val);
915 // For register offset, we encode the shift type and negation flag
917 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
919 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
920 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
921 Inst.addOperand(MCOperand::CreateImm(Val));
924 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
925 assert(N == 2 && "Invalid number of operands!");
926 if (Kind == PostIndexRegister) {
928 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
929 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
930 Inst.addOperand(MCOperand::CreateImm(Val));
935 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
936 int32_t Val = CE->getValue();
937 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
938 // Special case for #-0
939 if (Val == INT32_MIN) Val = 0;
940 if (Val < 0) Val = -Val;
941 Val = ARM_AM::getAM3Opc(AddSub, Val);
942 Inst.addOperand(MCOperand::CreateReg(0));
943 Inst.addOperand(MCOperand::CreateImm(Val));
946 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
947 assert(N == 2 && "Invalid number of operands!");
948 // The lower two bits are always zero and as such are not encoded.
949 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
950 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
951 // Special case for #-0
952 if (Val == INT32_MIN) Val = 0;
953 if (Val < 0) Val = -Val;
954 Val = ARM_AM::getAM5Opc(AddSub, Val);
955 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
956 Inst.addOperand(MCOperand::CreateImm(Val));
959 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
960 assert(N == 2 && "Invalid number of operands!");
961 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
962 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
963 Inst.addOperand(MCOperand::CreateImm(Val));
966 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
967 assert(N == 2 && "Invalid number of operands!");
968 // If this is an immediate, it's a label reference.
969 if (Kind == Immediate) {
970 addExpr(Inst, getImm());
971 Inst.addOperand(MCOperand::CreateImm(0));
975 // Otherwise, it's a normal memory reg+offset.
976 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
977 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
978 Inst.addOperand(MCOperand::CreateImm(Val));
981 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
982 assert(N == 3 && "Invalid number of operands!");
983 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
984 Mem.ShiftImm, Mem.ShiftType);
985 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
986 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
987 Inst.addOperand(MCOperand::CreateImm(Val));
990 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
991 assert(N == 2 && "Invalid number of operands!");
992 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
993 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
996 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
997 assert(N == 2 && "Invalid number of operands!");
998 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
999 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1000 Inst.addOperand(MCOperand::CreateImm(Val));
1003 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1004 assert(N == 2 && "Invalid number of operands!");
1005 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1006 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1007 Inst.addOperand(MCOperand::CreateImm(Val));
1010 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1011 assert(N == 1 && "Invalid number of operands!");
1012 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1013 assert(CE && "non-constant post-idx-imm8 operand!");
1014 int Imm = CE->getValue();
1015 bool isAdd = Imm >= 0;
1016 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1017 Inst.addOperand(MCOperand::CreateImm(Imm));
1020 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1021 assert(N == 2 && "Invalid number of operands!");
1022 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1023 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1026 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1027 assert(N == 2 && "Invalid number of operands!");
1028 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1029 // The sign, shift type, and shift amount are encoded in a single operand
1030 // using the AM2 encoding helpers.
1031 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1032 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1033 PostIdxReg.ShiftTy);
1034 Inst.addOperand(MCOperand::CreateImm(Imm));
1037 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1038 assert(N == 1 && "Invalid number of operands!");
1039 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1042 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1043 assert(N == 1 && "Invalid number of operands!");
1044 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1047 virtual void print(raw_ostream &OS) const;
1049 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1050 ARMOperand *Op = new ARMOperand(CondCode);
1057 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1058 ARMOperand *Op = new ARMOperand(CoprocNum);
1059 Op->Cop.Val = CopVal;
1065 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1066 ARMOperand *Op = new ARMOperand(CoprocReg);
1067 Op->Cop.Val = CopVal;
1073 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1074 ARMOperand *Op = new ARMOperand(CCOut);
1075 Op->Reg.RegNum = RegNum;
1081 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1082 ARMOperand *Op = new ARMOperand(Token);
1083 Op->Tok.Data = Str.data();
1084 Op->Tok.Length = Str.size();
1090 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1091 ARMOperand *Op = new ARMOperand(Register);
1092 Op->Reg.RegNum = RegNum;
1098 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1103 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1104 Op->RegShiftedReg.ShiftTy = ShTy;
1105 Op->RegShiftedReg.SrcReg = SrcReg;
1106 Op->RegShiftedReg.ShiftReg = ShiftReg;
1107 Op->RegShiftedReg.ShiftImm = ShiftImm;
1113 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1117 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1118 Op->RegShiftedImm.ShiftTy = ShTy;
1119 Op->RegShiftedImm.SrcReg = SrcReg;
1120 Op->RegShiftedImm.ShiftImm = ShiftImm;
1126 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1128 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1129 Op->ShifterImm.isASR = isASR;
1130 Op->ShifterImm.Imm = Imm;
1136 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1137 ARMOperand *Op = new ARMOperand(RotateImmediate);
1138 Op->RotImm.Imm = Imm;
1144 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1146 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1147 Op->Bitfield.LSB = LSB;
1148 Op->Bitfield.Width = Width;
1155 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1156 SMLoc StartLoc, SMLoc EndLoc) {
1157 KindTy Kind = RegisterList;
1159 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1160 contains(Regs.front().first))
1161 Kind = DPRRegisterList;
1162 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1163 contains(Regs.front().first))
1164 Kind = SPRRegisterList;
1166 ARMOperand *Op = new ARMOperand(Kind);
1167 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1168 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1169 Op->Registers.push_back(I->first);
1170 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1171 Op->StartLoc = StartLoc;
1172 Op->EndLoc = EndLoc;
1176 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1177 ARMOperand *Op = new ARMOperand(Immediate);
1184 static ARMOperand *CreateMem(unsigned BaseRegNum,
1185 const MCConstantExpr *OffsetImm,
1186 unsigned OffsetRegNum,
1187 ARM_AM::ShiftOpc ShiftType,
1191 ARMOperand *Op = new ARMOperand(Memory);
1192 Op->Mem.BaseRegNum = BaseRegNum;
1193 Op->Mem.OffsetImm = OffsetImm;
1194 Op->Mem.OffsetRegNum = OffsetRegNum;
1195 Op->Mem.ShiftType = ShiftType;
1196 Op->Mem.ShiftImm = ShiftImm;
1197 Op->Mem.isNegative = isNegative;
1203 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1204 ARM_AM::ShiftOpc ShiftTy,
1207 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1208 Op->PostIdxReg.RegNum = RegNum;
1209 Op->PostIdxReg.isAdd = isAdd;
1210 Op->PostIdxReg.ShiftTy = ShiftTy;
1211 Op->PostIdxReg.ShiftImm = ShiftImm;
1217 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1218 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1219 Op->MBOpt.Val = Opt;
1225 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1226 ARMOperand *Op = new ARMOperand(ProcIFlags);
1227 Op->IFlags.Val = IFlags;
1233 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1234 ARMOperand *Op = new ARMOperand(MSRMask);
1235 Op->MMask.Val = MMask;
1242 } // end anonymous namespace.
1244 void ARMOperand::print(raw_ostream &OS) const {
1247 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1250 OS << "<ccout " << getReg() << ">";
1253 OS << "<coprocessor number: " << getCoproc() << ">";
1256 OS << "<coprocessor register: " << getCoproc() << ">";
1259 OS << "<mask: " << getMSRMask() << ">";
1262 getImm()->print(OS);
1265 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1269 << " base:" << Mem.BaseRegNum;
1272 case PostIndexRegister:
1273 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1274 << PostIdxReg.RegNum;
1275 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1276 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1277 << PostIdxReg.ShiftImm;
1281 OS << "<ARM_PROC::";
1282 unsigned IFlags = getProcIFlags();
1283 for (int i=2; i >= 0; --i)
1284 if (IFlags & (1 << i))
1285 OS << ARM_PROC::IFlagsToString(1 << i);
1290 OS << "<register " << getReg() << ">";
1292 case ShifterImmediate:
1293 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1294 << " #" << ShifterImm.Imm << ">";
1296 case ShiftedRegister:
1297 OS << "<so_reg_reg "
1298 << RegShiftedReg.SrcReg
1299 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1300 << ", " << RegShiftedReg.ShiftReg << ", "
1301 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1304 case ShiftedImmediate:
1305 OS << "<so_reg_imm "
1306 << RegShiftedImm.SrcReg
1307 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1308 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1311 case RotateImmediate:
1312 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1314 case BitfieldDescriptor:
1315 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1316 << ", width: " << Bitfield.Width << ">";
1319 case DPRRegisterList:
1320 case SPRRegisterList: {
1321 OS << "<register_list ";
1323 const SmallVectorImpl<unsigned> &RegList = getRegList();
1324 for (SmallVectorImpl<unsigned>::const_iterator
1325 I = RegList.begin(), E = RegList.end(); I != E; ) {
1327 if (++I < E) OS << ", ";
1334 OS << "'" << getToken() << "'";
1339 /// @name Auto-generated Match Functions
1342 static unsigned MatchRegisterName(StringRef Name);
1346 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1347 SMLoc &StartLoc, SMLoc &EndLoc) {
1348 RegNo = tryParseRegister();
1350 return (RegNo == (unsigned)-1);
1353 /// Try to parse a register name. The token must be an Identifier when called,
1354 /// and if it is a register name the token is eaten and the register number is
1355 /// returned. Otherwise return -1.
1357 int ARMAsmParser::tryParseRegister() {
1358 const AsmToken &Tok = Parser.getTok();
1359 if (Tok.isNot(AsmToken::Identifier)) return -1;
1361 // FIXME: Validate register for the current architecture; we have to do
1362 // validation later, so maybe there is no need for this here.
1363 std::string upperCase = Tok.getString().str();
1364 std::string lowerCase = LowercaseString(upperCase);
1365 unsigned RegNum = MatchRegisterName(lowerCase);
1367 RegNum = StringSwitch<unsigned>(lowerCase)
1368 .Case("r13", ARM::SP)
1369 .Case("r14", ARM::LR)
1370 .Case("r15", ARM::PC)
1371 .Case("ip", ARM::R12)
1374 if (!RegNum) return -1;
1376 Parser.Lex(); // Eat identifier token.
1380 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1381 // If a recoverable error occurs, return 1. If an irrecoverable error
1382 // occurs, return -1. An irrecoverable error is one where tokens have been
1383 // consumed in the process of trying to parse the shifter (i.e., when it is
1384 // indeed a shifter operand, but malformed).
1385 int ARMAsmParser::tryParseShiftRegister(
1386 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1387 SMLoc S = Parser.getTok().getLoc();
1388 const AsmToken &Tok = Parser.getTok();
1389 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1391 std::string upperCase = Tok.getString().str();
1392 std::string lowerCase = LowercaseString(upperCase);
1393 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1394 .Case("lsl", ARM_AM::lsl)
1395 .Case("lsr", ARM_AM::lsr)
1396 .Case("asr", ARM_AM::asr)
1397 .Case("ror", ARM_AM::ror)
1398 .Case("rrx", ARM_AM::rrx)
1399 .Default(ARM_AM::no_shift);
1401 if (ShiftTy == ARM_AM::no_shift)
1404 Parser.Lex(); // Eat the operator.
1406 // The source register for the shift has already been added to the
1407 // operand list, so we need to pop it off and combine it into the shifted
1408 // register operand instead.
1409 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1410 if (!PrevOp->isReg())
1411 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1412 int SrcReg = PrevOp->getReg();
1415 if (ShiftTy == ARM_AM::rrx) {
1416 // RRX Doesn't have an explicit shift amount. The encoder expects
1417 // the shift register to be the same as the source register. Seems odd,
1421 // Figure out if this is shifted by a constant or a register (for non-RRX).
1422 if (Parser.getTok().is(AsmToken::Hash)) {
1423 Parser.Lex(); // Eat hash.
1424 SMLoc ImmLoc = Parser.getTok().getLoc();
1425 const MCExpr *ShiftExpr = 0;
1426 if (getParser().ParseExpression(ShiftExpr)) {
1427 Error(ImmLoc, "invalid immediate shift value");
1430 // The expression must be evaluatable as an immediate.
1431 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1433 Error(ImmLoc, "invalid immediate shift value");
1436 // Range check the immediate.
1437 // lsl, ror: 0 <= imm <= 31
1438 // lsr, asr: 0 <= imm <= 32
1439 Imm = CE->getValue();
1441 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1442 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1443 Error(ImmLoc, "immediate shift value out of range");
1446 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1447 ShiftReg = tryParseRegister();
1448 SMLoc L = Parser.getTok().getLoc();
1449 if (ShiftReg == -1) {
1450 Error (L, "expected immediate or register in shift operand");
1454 Error (Parser.getTok().getLoc(),
1455 "expected immediate or register in shift operand");
1460 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1461 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1463 S, Parser.getTok().getLoc()));
1465 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1466 S, Parser.getTok().getLoc()));
1472 /// Try to parse a register name. The token must be an Identifier when called.
1473 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1474 /// if there is a "writeback". 'true' if it's not a register.
1476 /// TODO this is likely to change to allow different register types and or to
1477 /// parse for a specific register type.
1479 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1480 SMLoc S = Parser.getTok().getLoc();
1481 int RegNo = tryParseRegister();
1485 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1487 const AsmToken &ExclaimTok = Parser.getTok();
1488 if (ExclaimTok.is(AsmToken::Exclaim)) {
1489 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1490 ExclaimTok.getLoc()));
1491 Parser.Lex(); // Eat exclaim token
1497 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1498 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1500 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1501 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1503 switch (Name.size()) {
1506 if (Name[0] != CoprocOp)
1523 if (Name[0] != CoprocOp || Name[1] != '1')
1527 case '0': return 10;
1528 case '1': return 11;
1529 case '2': return 12;
1530 case '3': return 13;
1531 case '4': return 14;
1532 case '5': return 15;
1540 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1541 /// token must be an Identifier when called, and if it is a coprocessor
1542 /// number, the token is eaten and the operand is added to the operand list.
1543 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1544 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1545 SMLoc S = Parser.getTok().getLoc();
1546 const AsmToken &Tok = Parser.getTok();
1547 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1549 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1551 return MatchOperand_NoMatch;
1553 Parser.Lex(); // Eat identifier token.
1554 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1555 return MatchOperand_Success;
1558 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1559 /// token must be an Identifier when called, and if it is a coprocessor
1560 /// number, the token is eaten and the operand is added to the operand list.
1561 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1562 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1563 SMLoc S = Parser.getTok().getLoc();
1564 const AsmToken &Tok = Parser.getTok();
1565 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1567 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1569 return MatchOperand_NoMatch;
1571 Parser.Lex(); // Eat identifier token.
1572 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1573 return MatchOperand_Success;
1576 /// Parse a register list, return it if successful else return null. The first
1577 /// token must be a '{' when called.
1579 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1580 assert(Parser.getTok().is(AsmToken::LCurly) &&
1581 "Token is not a Left Curly Brace");
1582 SMLoc S = Parser.getTok().getLoc();
1584 // Read the rest of the registers in the list.
1585 unsigned PrevRegNum = 0;
1586 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1589 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1590 Parser.Lex(); // Eat non-identifier token.
1592 const AsmToken &RegTok = Parser.getTok();
1593 SMLoc RegLoc = RegTok.getLoc();
1594 if (RegTok.isNot(AsmToken::Identifier)) {
1595 Error(RegLoc, "register expected");
1599 int RegNum = tryParseRegister();
1601 Error(RegLoc, "register expected");
1606 int Reg = PrevRegNum;
1609 Registers.push_back(std::make_pair(Reg, RegLoc));
1610 } while (Reg != RegNum);
1612 Registers.push_back(std::make_pair(RegNum, RegLoc));
1615 PrevRegNum = RegNum;
1616 } while (Parser.getTok().is(AsmToken::Comma) ||
1617 Parser.getTok().is(AsmToken::Minus));
1619 // Process the right curly brace of the list.
1620 const AsmToken &RCurlyTok = Parser.getTok();
1621 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1622 Error(RCurlyTok.getLoc(), "'}' expected");
1626 SMLoc E = RCurlyTok.getLoc();
1627 Parser.Lex(); // Eat right curly brace token.
1629 // Verify the register list.
1630 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1631 RI = Registers.begin(), RE = Registers.end();
1633 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1634 bool EmittedWarning = false;
1636 DenseMap<unsigned, bool> RegMap;
1637 RegMap[HighRegNum] = true;
1639 for (++RI; RI != RE; ++RI) {
1640 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1641 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1644 Error(RegInfo.second, "register duplicated in register list");
1648 if (!EmittedWarning && Reg < HighRegNum)
1649 Warning(RegInfo.second,
1650 "register not in ascending order in register list");
1653 HighRegNum = std::max(Reg, HighRegNum);
1656 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1660 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1661 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1662 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1663 SMLoc S = Parser.getTok().getLoc();
1664 const AsmToken &Tok = Parser.getTok();
1665 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1666 StringRef OptStr = Tok.getString();
1668 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1669 .Case("sy", ARM_MB::SY)
1670 .Case("st", ARM_MB::ST)
1671 .Case("sh", ARM_MB::ISH)
1672 .Case("ish", ARM_MB::ISH)
1673 .Case("shst", ARM_MB::ISHST)
1674 .Case("ishst", ARM_MB::ISHST)
1675 .Case("nsh", ARM_MB::NSH)
1676 .Case("un", ARM_MB::NSH)
1677 .Case("nshst", ARM_MB::NSHST)
1678 .Case("unst", ARM_MB::NSHST)
1679 .Case("osh", ARM_MB::OSH)
1680 .Case("oshst", ARM_MB::OSHST)
1684 return MatchOperand_NoMatch;
1686 Parser.Lex(); // Eat identifier token.
1687 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1688 return MatchOperand_Success;
1691 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1692 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1693 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1694 SMLoc S = Parser.getTok().getLoc();
1695 const AsmToken &Tok = Parser.getTok();
1696 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1697 StringRef IFlagsStr = Tok.getString();
1699 unsigned IFlags = 0;
1700 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1701 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1702 .Case("a", ARM_PROC::A)
1703 .Case("i", ARM_PROC::I)
1704 .Case("f", ARM_PROC::F)
1707 // If some specific iflag is already set, it means that some letter is
1708 // present more than once, this is not acceptable.
1709 if (Flag == ~0U || (IFlags & Flag))
1710 return MatchOperand_NoMatch;
1715 Parser.Lex(); // Eat identifier token.
1716 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1717 return MatchOperand_Success;
1720 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1721 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1722 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1723 SMLoc S = Parser.getTok().getLoc();
1724 const AsmToken &Tok = Parser.getTok();
1725 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1726 StringRef Mask = Tok.getString();
1728 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1729 size_t Start = 0, Next = Mask.find('_');
1730 StringRef Flags = "";
1731 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1732 if (Next != StringRef::npos)
1733 Flags = Mask.slice(Next+1, Mask.size());
1735 // FlagsVal contains the complete mask:
1737 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1738 unsigned FlagsVal = 0;
1740 if (SpecReg == "apsr") {
1741 FlagsVal = StringSwitch<unsigned>(Flags)
1742 .Case("nzcvq", 0x8) // same as CPSR_f
1743 .Case("g", 0x4) // same as CPSR_s
1744 .Case("nzcvqg", 0xc) // same as CPSR_fs
1747 if (FlagsVal == ~0U) {
1749 return MatchOperand_NoMatch;
1751 FlagsVal = 0; // No flag
1753 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1754 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1756 for (int i = 0, e = Flags.size(); i != e; ++i) {
1757 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1764 // If some specific flag is already set, it means that some letter is
1765 // present more than once, this is not acceptable.
1766 if (FlagsVal == ~0U || (FlagsVal & Flag))
1767 return MatchOperand_NoMatch;
1770 } else // No match for special register.
1771 return MatchOperand_NoMatch;
1773 // Special register without flags are equivalent to "fc" flags.
1777 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1778 if (SpecReg == "spsr")
1781 Parser.Lex(); // Eat identifier token.
1782 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1783 return MatchOperand_Success;
1786 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1787 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1788 int Low, int High) {
1789 const AsmToken &Tok = Parser.getTok();
1790 if (Tok.isNot(AsmToken::Identifier)) {
1791 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1792 return MatchOperand_ParseFail;
1794 StringRef ShiftName = Tok.getString();
1795 std::string LowerOp = LowercaseString(Op);
1796 std::string UpperOp = UppercaseString(Op);
1797 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1798 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1799 return MatchOperand_ParseFail;
1801 Parser.Lex(); // Eat shift type token.
1803 // There must be a '#' and a shift amount.
1804 if (Parser.getTok().isNot(AsmToken::Hash)) {
1805 Error(Parser.getTok().getLoc(), "'#' expected");
1806 return MatchOperand_ParseFail;
1808 Parser.Lex(); // Eat hash token.
1810 const MCExpr *ShiftAmount;
1811 SMLoc Loc = Parser.getTok().getLoc();
1812 if (getParser().ParseExpression(ShiftAmount)) {
1813 Error(Loc, "illegal expression");
1814 return MatchOperand_ParseFail;
1816 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1818 Error(Loc, "constant expression expected");
1819 return MatchOperand_ParseFail;
1821 int Val = CE->getValue();
1822 if (Val < Low || Val > High) {
1823 Error(Loc, "immediate value out of range");
1824 return MatchOperand_ParseFail;
1827 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1829 return MatchOperand_Success;
1832 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1833 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1834 const AsmToken &Tok = Parser.getTok();
1835 SMLoc S = Tok.getLoc();
1836 if (Tok.isNot(AsmToken::Identifier)) {
1837 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1838 return MatchOperand_ParseFail;
1840 int Val = StringSwitch<int>(Tok.getString())
1844 Parser.Lex(); // Eat the token.
1847 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1848 return MatchOperand_ParseFail;
1850 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1852 S, Parser.getTok().getLoc()));
1853 return MatchOperand_Success;
1856 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1857 /// instructions. Legal values are:
1858 /// lsl #n 'n' in [0,31]
1859 /// asr #n 'n' in [1,32]
1860 /// n == 32 encoded as n == 0.
1861 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1862 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1863 const AsmToken &Tok = Parser.getTok();
1864 SMLoc S = Tok.getLoc();
1865 if (Tok.isNot(AsmToken::Identifier)) {
1866 Error(S, "shift operator 'asr' or 'lsl' expected");
1867 return MatchOperand_ParseFail;
1869 StringRef ShiftName = Tok.getString();
1871 if (ShiftName == "lsl" || ShiftName == "LSL")
1873 else if (ShiftName == "asr" || ShiftName == "ASR")
1876 Error(S, "shift operator 'asr' or 'lsl' expected");
1877 return MatchOperand_ParseFail;
1879 Parser.Lex(); // Eat the operator.
1881 // A '#' and a shift amount.
1882 if (Parser.getTok().isNot(AsmToken::Hash)) {
1883 Error(Parser.getTok().getLoc(), "'#' expected");
1884 return MatchOperand_ParseFail;
1886 Parser.Lex(); // Eat hash token.
1888 const MCExpr *ShiftAmount;
1889 SMLoc E = Parser.getTok().getLoc();
1890 if (getParser().ParseExpression(ShiftAmount)) {
1891 Error(E, "malformed shift expression");
1892 return MatchOperand_ParseFail;
1894 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1896 Error(E, "shift amount must be an immediate");
1897 return MatchOperand_ParseFail;
1900 int64_t Val = CE->getValue();
1902 // Shift amount must be in [1,32]
1903 if (Val < 1 || Val > 32) {
1904 Error(E, "'asr' shift amount must be in range [1,32]");
1905 return MatchOperand_ParseFail;
1907 // asr #32 encoded as asr #0.
1908 if (Val == 32) Val = 0;
1910 // Shift amount must be in [1,32]
1911 if (Val < 0 || Val > 31) {
1912 Error(E, "'lsr' shift amount must be in range [0,31]");
1913 return MatchOperand_ParseFail;
1917 E = Parser.getTok().getLoc();
1918 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1920 return MatchOperand_Success;
1923 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1924 /// of instructions. Legal values are:
1925 /// ror #n 'n' in {0, 8, 16, 24}
1926 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1927 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1928 const AsmToken &Tok = Parser.getTok();
1929 SMLoc S = Tok.getLoc();
1930 if (Tok.isNot(AsmToken::Identifier)) {
1931 Error(S, "rotate operator 'ror' expected");
1932 return MatchOperand_ParseFail;
1934 StringRef ShiftName = Tok.getString();
1935 if (ShiftName != "ror" && ShiftName != "ROR") {
1936 Error(S, "rotate operator 'ror' expected");
1937 return MatchOperand_ParseFail;
1939 Parser.Lex(); // Eat the operator.
1941 // A '#' and a rotate amount.
1942 if (Parser.getTok().isNot(AsmToken::Hash)) {
1943 Error(Parser.getTok().getLoc(), "'#' expected");
1944 return MatchOperand_ParseFail;
1946 Parser.Lex(); // Eat hash token.
1948 const MCExpr *ShiftAmount;
1949 SMLoc E = Parser.getTok().getLoc();
1950 if (getParser().ParseExpression(ShiftAmount)) {
1951 Error(E, "malformed rotate expression");
1952 return MatchOperand_ParseFail;
1954 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1956 Error(E, "rotate amount must be an immediate");
1957 return MatchOperand_ParseFail;
1960 int64_t Val = CE->getValue();
1961 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1962 // normally, zero is represented in asm by omitting the rotate operand
1964 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1965 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1966 return MatchOperand_ParseFail;
1969 E = Parser.getTok().getLoc();
1970 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1972 return MatchOperand_Success;
1975 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1976 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1977 SMLoc S = Parser.getTok().getLoc();
1978 // The bitfield descriptor is really two operands, the LSB and the width.
1979 if (Parser.getTok().isNot(AsmToken::Hash)) {
1980 Error(Parser.getTok().getLoc(), "'#' expected");
1981 return MatchOperand_ParseFail;
1983 Parser.Lex(); // Eat hash token.
1985 const MCExpr *LSBExpr;
1986 SMLoc E = Parser.getTok().getLoc();
1987 if (getParser().ParseExpression(LSBExpr)) {
1988 Error(E, "malformed immediate expression");
1989 return MatchOperand_ParseFail;
1991 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
1993 Error(E, "'lsb' operand must be an immediate");
1994 return MatchOperand_ParseFail;
1997 int64_t LSB = CE->getValue();
1998 // The LSB must be in the range [0,31]
1999 if (LSB < 0 || LSB > 31) {
2000 Error(E, "'lsb' operand must be in the range [0,31]");
2001 return MatchOperand_ParseFail;
2003 E = Parser.getTok().getLoc();
2005 // Expect another immediate operand.
2006 if (Parser.getTok().isNot(AsmToken::Comma)) {
2007 Error(Parser.getTok().getLoc(), "too few operands");
2008 return MatchOperand_ParseFail;
2010 Parser.Lex(); // Eat hash token.
2011 if (Parser.getTok().isNot(AsmToken::Hash)) {
2012 Error(Parser.getTok().getLoc(), "'#' expected");
2013 return MatchOperand_ParseFail;
2015 Parser.Lex(); // Eat hash token.
2017 const MCExpr *WidthExpr;
2018 if (getParser().ParseExpression(WidthExpr)) {
2019 Error(E, "malformed immediate expression");
2020 return MatchOperand_ParseFail;
2022 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2024 Error(E, "'width' operand must be an immediate");
2025 return MatchOperand_ParseFail;
2028 int64_t Width = CE->getValue();
2029 // The LSB must be in the range [1,32-lsb]
2030 if (Width < 1 || Width > 32 - LSB) {
2031 Error(E, "'width' operand must be in the range [1,32-lsb]");
2032 return MatchOperand_ParseFail;
2034 E = Parser.getTok().getLoc();
2036 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2038 return MatchOperand_Success;
2041 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2042 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2043 // Check for a post-index addressing register operand. Specifically:
2044 // postidx_reg := '+' register {, shift}
2045 // | '-' register {, shift}
2046 // | register {, shift}
2048 // This method must return MatchOperand_NoMatch without consuming any tokens
2049 // in the case where there is no match, as other alternatives take other
2051 AsmToken Tok = Parser.getTok();
2052 SMLoc S = Tok.getLoc();
2053 bool haveEaten = false;
2056 if (Tok.is(AsmToken::Plus)) {
2057 Parser.Lex(); // Eat the '+' token.
2059 } else if (Tok.is(AsmToken::Minus)) {
2060 Parser.Lex(); // Eat the '-' token.
2064 if (Parser.getTok().is(AsmToken::Identifier))
2065 Reg = tryParseRegister();
2068 return MatchOperand_NoMatch;
2069 Error(Parser.getTok().getLoc(), "register expected");
2070 return MatchOperand_ParseFail;
2072 SMLoc E = Parser.getTok().getLoc();
2074 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2075 unsigned ShiftImm = 0;
2076 if (Parser.getTok().is(AsmToken::Comma)) {
2077 Parser.Lex(); // Eat the ','.
2078 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2079 return MatchOperand_ParseFail;
2082 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2085 return MatchOperand_Success;
2088 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2089 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2090 // Check for a post-index addressing register operand. Specifically:
2091 // am3offset := '+' register
2098 // This method must return MatchOperand_NoMatch without consuming any tokens
2099 // in the case where there is no match, as other alternatives take other
2101 AsmToken Tok = Parser.getTok();
2102 SMLoc S = Tok.getLoc();
2104 // Do immediates first, as we always parse those if we have a '#'.
2105 if (Parser.getTok().is(AsmToken::Hash)) {
2106 Parser.Lex(); // Eat the '#'.
2107 // Explicitly look for a '-', as we need to encode negative zero
2109 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2110 const MCExpr *Offset;
2111 if (getParser().ParseExpression(Offset))
2112 return MatchOperand_ParseFail;
2113 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2115 Error(S, "constant expression expected");
2116 return MatchOperand_ParseFail;
2118 SMLoc E = Tok.getLoc();
2119 // Negative zero is encoded as the flag value INT32_MIN.
2120 int32_t Val = CE->getValue();
2121 if (isNegative && Val == 0)
2125 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2127 return MatchOperand_Success;
2131 bool haveEaten = false;
2134 if (Tok.is(AsmToken::Plus)) {
2135 Parser.Lex(); // Eat the '+' token.
2137 } else if (Tok.is(AsmToken::Minus)) {
2138 Parser.Lex(); // Eat the '-' token.
2142 if (Parser.getTok().is(AsmToken::Identifier))
2143 Reg = tryParseRegister();
2146 return MatchOperand_NoMatch;
2147 Error(Parser.getTok().getLoc(), "register expected");
2148 return MatchOperand_ParseFail;
2150 SMLoc E = Parser.getTok().getLoc();
2152 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2155 return MatchOperand_Success;
2158 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2159 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2160 /// when they refer multiple MIOperands inside a single one.
2162 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2163 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2164 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2166 // Create a writeback register dummy placeholder.
2167 Inst.addOperand(MCOperand::CreateImm(0));
2169 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2170 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2174 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2175 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2176 /// when they refer multiple MIOperands inside a single one.
2178 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2179 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2180 // Create a writeback register dummy placeholder.
2181 Inst.addOperand(MCOperand::CreateImm(0));
2182 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2183 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2184 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2188 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2189 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2190 /// when they refer multiple MIOperands inside a single one.
2192 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2193 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2194 // Create a writeback register dummy placeholder.
2195 Inst.addOperand(MCOperand::CreateImm(0));
2196 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2197 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2198 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2202 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2203 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2204 /// when they refer multiple MIOperands inside a single one.
2206 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2207 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2208 // Create a writeback register dummy placeholder.
2209 Inst.addOperand(MCOperand::CreateImm(0));
2210 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2211 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2212 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2216 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2217 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2218 /// when they refer multiple MIOperands inside a single one.
2220 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2221 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2223 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2224 // Create a writeback register dummy placeholder.
2225 Inst.addOperand(MCOperand::CreateImm(0));
2227 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2229 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2231 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2235 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2236 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2237 /// when they refer multiple MIOperands inside a single one.
2239 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2240 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2242 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2243 // Create a writeback register dummy placeholder.
2244 Inst.addOperand(MCOperand::CreateImm(0));
2246 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2248 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2250 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2254 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2255 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2256 /// when they refer multiple MIOperands inside a single one.
2258 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2259 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2260 // Create a writeback register dummy placeholder.
2261 Inst.addOperand(MCOperand::CreateImm(0));
2263 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2265 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2267 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2269 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2273 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2274 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2275 /// when they refer multiple MIOperands inside a single one.
2277 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2278 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2279 // Create a writeback register dummy placeholder.
2280 Inst.addOperand(MCOperand::CreateImm(0));
2282 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2284 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2286 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2288 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2292 /// cvtLdrdPre - Convert parsed operands to MCInst.
2293 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2294 /// when they refer multiple MIOperands inside a single one.
2296 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2297 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2299 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2300 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2301 // Create a writeback register dummy placeholder.
2302 Inst.addOperand(MCOperand::CreateImm(0));
2304 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2306 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2310 /// cvtStrdPre - Convert parsed operands to MCInst.
2311 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2312 /// when they refer multiple MIOperands inside a single one.
2314 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2315 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2316 // Create a writeback register dummy placeholder.
2317 Inst.addOperand(MCOperand::CreateImm(0));
2319 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2320 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2322 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2324 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2328 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2329 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2330 /// when they refer multiple MIOperands inside a single one.
2332 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2333 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2334 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2335 // Create a writeback register dummy placeholder.
2336 Inst.addOperand(MCOperand::CreateImm(0));
2337 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2338 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2343 /// Parse an ARM memory expression, return false if successful else return true
2344 /// or an error. The first token must be a '[' when called.
2346 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2348 assert(Parser.getTok().is(AsmToken::LBrac) &&
2349 "Token is not a Left Bracket");
2350 S = Parser.getTok().getLoc();
2351 Parser.Lex(); // Eat left bracket token.
2353 const AsmToken &BaseRegTok = Parser.getTok();
2354 int BaseRegNum = tryParseRegister();
2355 if (BaseRegNum == -1)
2356 return Error(BaseRegTok.getLoc(), "register expected");
2358 // The next token must either be a comma or a closing bracket.
2359 const AsmToken &Tok = Parser.getTok();
2360 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2361 return Error(Tok.getLoc(), "malformed memory operand");
2363 if (Tok.is(AsmToken::RBrac)) {
2365 Parser.Lex(); // Eat right bracket token.
2367 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2373 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2374 Parser.Lex(); // Eat the comma.
2376 // If we have a '#' it's an immediate offset, else assume it's a register
2378 if (Parser.getTok().is(AsmToken::Hash)) {
2379 Parser.Lex(); // Eat the '#'.
2380 E = Parser.getTok().getLoc();
2382 // FIXME: Special case #-0 so we can correctly set the U bit.
2384 const MCExpr *Offset;
2385 if (getParser().ParseExpression(Offset))
2388 // The expression has to be a constant. Memory references with relocations
2389 // don't come through here, as they use the <label> forms of the relevant
2391 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2393 return Error (E, "constant expression expected");
2395 // Now we should have the closing ']'
2396 E = Parser.getTok().getLoc();
2397 if (Parser.getTok().isNot(AsmToken::RBrac))
2398 return Error(E, "']' expected");
2399 Parser.Lex(); // Eat right bracket token.
2401 // Don't worry about range checking the value here. That's handled by
2402 // the is*() predicates.
2403 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2404 ARM_AM::no_shift, 0, false, S,E));
2406 // If there's a pre-indexing writeback marker, '!', just add it as a token
2408 if (Parser.getTok().is(AsmToken::Exclaim)) {
2409 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2410 Parser.Lex(); // Eat the '!'.
2416 // The register offset is optionally preceded by a '+' or '-'
2417 bool isNegative = false;
2418 if (Parser.getTok().is(AsmToken::Minus)) {
2420 Parser.Lex(); // Eat the '-'.
2421 } else if (Parser.getTok().is(AsmToken::Plus)) {
2423 Parser.Lex(); // Eat the '+'.
2426 E = Parser.getTok().getLoc();
2427 int OffsetRegNum = tryParseRegister();
2428 if (OffsetRegNum == -1)
2429 return Error(E, "register expected");
2431 // If there's a shift operator, handle it.
2432 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2433 unsigned ShiftImm = 0;
2434 if (Parser.getTok().is(AsmToken::Comma)) {
2435 Parser.Lex(); // Eat the ','.
2436 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2440 // Now we should have the closing ']'
2441 E = Parser.getTok().getLoc();
2442 if (Parser.getTok().isNot(AsmToken::RBrac))
2443 return Error(E, "']' expected");
2444 Parser.Lex(); // Eat right bracket token.
2446 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2447 ShiftType, ShiftImm, isNegative,
2450 // If there's a pre-indexing writeback marker, '!', just add it as a token
2452 if (Parser.getTok().is(AsmToken::Exclaim)) {
2453 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2454 Parser.Lex(); // Eat the '!'.
2460 /// parseMemRegOffsetShift - one of these two:
2461 /// ( lsl | lsr | asr | ror ) , # shift_amount
2463 /// return true if it parses a shift otherwise it returns false.
2464 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2466 SMLoc Loc = Parser.getTok().getLoc();
2467 const AsmToken &Tok = Parser.getTok();
2468 if (Tok.isNot(AsmToken::Identifier))
2470 StringRef ShiftName = Tok.getString();
2471 if (ShiftName == "lsl" || ShiftName == "LSL")
2473 else if (ShiftName == "lsr" || ShiftName == "LSR")
2475 else if (ShiftName == "asr" || ShiftName == "ASR")
2477 else if (ShiftName == "ror" || ShiftName == "ROR")
2479 else if (ShiftName == "rrx" || ShiftName == "RRX")
2482 return Error(Loc, "illegal shift operator");
2483 Parser.Lex(); // Eat shift type token.
2485 // rrx stands alone.
2487 if (St != ARM_AM::rrx) {
2488 Loc = Parser.getTok().getLoc();
2489 // A '#' and a shift amount.
2490 const AsmToken &HashTok = Parser.getTok();
2491 if (HashTok.isNot(AsmToken::Hash))
2492 return Error(HashTok.getLoc(), "'#' expected");
2493 Parser.Lex(); // Eat hash token.
2496 if (getParser().ParseExpression(Expr))
2498 // Range check the immediate.
2499 // lsl, ror: 0 <= imm <= 31
2500 // lsr, asr: 0 <= imm <= 32
2501 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2503 return Error(Loc, "shift amount must be an immediate");
2504 int64_t Imm = CE->getValue();
2506 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2507 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2508 return Error(Loc, "immediate shift value out of range");
2515 /// Parse a arm instruction operand. For now this parses the operand regardless
2516 /// of the mnemonic.
2517 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2518 StringRef Mnemonic) {
2521 // Check if the current operand has a custom associated parser, if so, try to
2522 // custom parse the operand, or fallback to the general approach.
2523 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2524 if (ResTy == MatchOperand_Success)
2526 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2527 // there was a match, but an error occurred, in which case, just return that
2528 // the operand parsing failed.
2529 if (ResTy == MatchOperand_ParseFail)
2532 switch (getLexer().getKind()) {
2534 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2536 case AsmToken::Identifier: {
2537 if (!tryParseRegisterWithWriteBack(Operands))
2539 int Res = tryParseShiftRegister(Operands);
2540 if (Res == 0) // success
2542 else if (Res == -1) // irrecoverable error
2545 // Fall though for the Identifier case that is not a register or a
2548 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2549 case AsmToken::Dot: { // . as a branch target
2550 // This was not a register so parse other operands that start with an
2551 // identifier (like labels) as expressions and create them as immediates.
2552 const MCExpr *IdVal;
2553 S = Parser.getTok().getLoc();
2554 if (getParser().ParseExpression(IdVal))
2556 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2557 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2560 case AsmToken::LBrac:
2561 return parseMemory(Operands);
2562 case AsmToken::LCurly:
2563 return parseRegisterList(Operands);
2564 case AsmToken::Hash:
2565 // #42 -> immediate.
2566 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2567 S = Parser.getTok().getLoc();
2569 const MCExpr *ImmVal;
2570 if (getParser().ParseExpression(ImmVal))
2572 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2573 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2575 case AsmToken::Colon: {
2576 // ":lower16:" and ":upper16:" expression prefixes
2577 // FIXME: Check it's an expression prefix,
2578 // e.g. (FOO - :lower16:BAR) isn't legal.
2579 ARMMCExpr::VariantKind RefKind;
2580 if (parsePrefix(RefKind))
2583 const MCExpr *SubExprVal;
2584 if (getParser().ParseExpression(SubExprVal))
2587 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2589 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2590 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2596 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2597 // :lower16: and :upper16:.
2598 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2599 RefKind = ARMMCExpr::VK_ARM_None;
2601 // :lower16: and :upper16: modifiers
2602 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2603 Parser.Lex(); // Eat ':'
2605 if (getLexer().isNot(AsmToken::Identifier)) {
2606 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2610 StringRef IDVal = Parser.getTok().getIdentifier();
2611 if (IDVal == "lower16") {
2612 RefKind = ARMMCExpr::VK_ARM_LO16;
2613 } else if (IDVal == "upper16") {
2614 RefKind = ARMMCExpr::VK_ARM_HI16;
2616 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2621 if (getLexer().isNot(AsmToken::Colon)) {
2622 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2625 Parser.Lex(); // Eat the last ':'
2630 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2631 MCSymbolRefExpr::VariantKind Variant) {
2632 // Recurse over the given expression, rebuilding it to apply the given variant
2633 // to the leftmost symbol.
2634 if (Variant == MCSymbolRefExpr::VK_None)
2637 switch (E->getKind()) {
2638 case MCExpr::Target:
2639 llvm_unreachable("Can't handle target expr yet");
2640 case MCExpr::Constant:
2641 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2643 case MCExpr::SymbolRef: {
2644 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2646 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2649 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2653 llvm_unreachable("Can't handle unary expressions yet");
2655 case MCExpr::Binary: {
2656 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2657 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2658 const MCExpr *RHS = BE->getRHS();
2662 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2666 assert(0 && "Invalid expression kind!");
2670 /// \brief Given a mnemonic, split out possible predication code and carry
2671 /// setting letters to form a canonical mnemonic and flags.
2673 // FIXME: Would be nice to autogen this.
2674 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2675 unsigned &PredicationCode,
2677 unsigned &ProcessorIMod) {
2678 PredicationCode = ARMCC::AL;
2679 CarrySetting = false;
2682 // Ignore some mnemonics we know aren't predicated forms.
2684 // FIXME: Would be nice to autogen this.
2685 if ((Mnemonic == "movs" && isThumb()) ||
2686 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2687 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2688 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2689 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2690 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2691 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2692 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2695 // First, split out any predication code. Ignore mnemonics we know aren't
2696 // predicated but do have a carry-set and so weren't caught above.
2697 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2698 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2699 Mnemonic != "umlals" && Mnemonic != "umulls") {
2700 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2701 .Case("eq", ARMCC::EQ)
2702 .Case("ne", ARMCC::NE)
2703 .Case("hs", ARMCC::HS)
2704 .Case("cs", ARMCC::HS)
2705 .Case("lo", ARMCC::LO)
2706 .Case("cc", ARMCC::LO)
2707 .Case("mi", ARMCC::MI)
2708 .Case("pl", ARMCC::PL)
2709 .Case("vs", ARMCC::VS)
2710 .Case("vc", ARMCC::VC)
2711 .Case("hi", ARMCC::HI)
2712 .Case("ls", ARMCC::LS)
2713 .Case("ge", ARMCC::GE)
2714 .Case("lt", ARMCC::LT)
2715 .Case("gt", ARMCC::GT)
2716 .Case("le", ARMCC::LE)
2717 .Case("al", ARMCC::AL)
2720 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2721 PredicationCode = CC;
2725 // Next, determine if we have a carry setting bit. We explicitly ignore all
2726 // the instructions we know end in 's'.
2727 if (Mnemonic.endswith("s") &&
2728 !(Mnemonic == "cps" || Mnemonic == "mls" ||
2729 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2730 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2731 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2732 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2733 (Mnemonic == "movs" && isThumb()))) {
2734 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2735 CarrySetting = true;
2738 // The "cps" instruction can have a interrupt mode operand which is glued into
2739 // the mnemonic. Check if this is the case, split it and parse the imod op
2740 if (Mnemonic.startswith("cps")) {
2741 // Split out any imod code.
2743 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2744 .Case("ie", ARM_PROC::IE)
2745 .Case("id", ARM_PROC::ID)
2748 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2749 ProcessorIMod = IMod;
2756 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2757 /// inclusion of carry set or predication code operands.
2759 // FIXME: It would be nice to autogen this.
2761 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2762 bool &CanAcceptPredicationCode) {
2763 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2764 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2765 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2766 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2767 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2768 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2769 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2770 Mnemonic == "eor" || Mnemonic == "smlal" ||
2771 // FIXME: We need a better way. This really confused Thumb2
2772 // parsing for 'mov'.
2773 (Mnemonic == "mov" && !isThumbOne())) {
2774 CanAcceptCarrySet = true;
2776 CanAcceptCarrySet = false;
2779 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2780 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2781 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2782 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2783 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2784 Mnemonic == "setend" ||
2785 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2786 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2788 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2789 CanAcceptPredicationCode = false;
2791 CanAcceptPredicationCode = true;
2795 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2796 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2797 CanAcceptPredicationCode = false;
2800 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
2801 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2803 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2804 // another does not. Specifically, the MOVW instruction does not. So we
2805 // special case it here and remove the defaulted (non-setting) cc_out
2806 // operand if that's the instruction we're trying to match.
2808 // We do this as post-processing of the explicit operands rather than just
2809 // conditionally adding the cc_out in the first place because we need
2810 // to check the type of the parsed immediate operand.
2811 if (Mnemonic == "mov" && Operands.size() > 4 &&
2812 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2813 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2814 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2817 // Register-register 'add' for thumb does not have a cc_out operand
2818 // when there are only two register operands.
2819 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
2820 static_cast<ARMOperand*>(Operands[3])->isReg() &&
2821 static_cast<ARMOperand*>(Operands[4])->isReg() &&
2822 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2828 /// Parse an arm instruction mnemonic followed by its operands.
2829 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2830 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2831 // Create the leading tokens for the mnemonic, split by '.' characters.
2832 size_t Start = 0, Next = Name.find('.');
2833 StringRef Mnemonic = Name.slice(Start, Next);
2835 // Split out the predication code and carry setting flag from the mnemonic.
2836 unsigned PredicationCode;
2837 unsigned ProcessorIMod;
2839 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2842 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2844 // FIXME: This is all a pretty gross hack. We should automatically handle
2845 // optional operands like this via tblgen.
2847 // Next, add the CCOut and ConditionCode operands, if needed.
2849 // For mnemonics which can ever incorporate a carry setting bit or predication
2850 // code, our matching model involves us always generating CCOut and
2851 // ConditionCode operands to match the mnemonic "as written" and then we let
2852 // the matcher deal with finding the right instruction or generating an
2853 // appropriate error.
2854 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2855 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2857 // If we had a carry-set on an instruction that can't do that, issue an
2859 if (!CanAcceptCarrySet && CarrySetting) {
2860 Parser.EatToEndOfStatement();
2861 return Error(NameLoc, "instruction '" + Mnemonic +
2862 "' can not set flags, but 's' suffix specified");
2864 // If we had a predication code on an instruction that can't do that, issue an
2866 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2867 Parser.EatToEndOfStatement();
2868 return Error(NameLoc, "instruction '" + Mnemonic +
2869 "' is not predicable, but condition code specified");
2872 // Add the carry setting operand, if necessary.
2874 // FIXME: It would be awesome if we could somehow invent a location such that
2875 // match errors on this operand would print a nice diagnostic about how the
2876 // 's' character in the mnemonic resulted in a CCOut operand.
2877 if (CanAcceptCarrySet)
2878 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2881 // Add the predication code operand, if necessary.
2882 if (CanAcceptPredicationCode) {
2883 Operands.push_back(ARMOperand::CreateCondCode(
2884 ARMCC::CondCodes(PredicationCode), NameLoc));
2887 // Add the processor imod operand, if necessary.
2888 if (ProcessorIMod) {
2889 Operands.push_back(ARMOperand::CreateImm(
2890 MCConstantExpr::Create(ProcessorIMod, getContext()),
2893 // This mnemonic can't ever accept a imod, but the user wrote
2894 // one (or misspelled another mnemonic).
2896 // FIXME: Issue a nice error.
2899 // Add the remaining tokens in the mnemonic.
2900 while (Next != StringRef::npos) {
2902 Next = Name.find('.', Start + 1);
2903 StringRef ExtraToken = Name.slice(Start, Next);
2905 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2908 // Read the remaining operands.
2909 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2910 // Read the first operand.
2911 if (parseOperand(Operands, Mnemonic)) {
2912 Parser.EatToEndOfStatement();
2916 while (getLexer().is(AsmToken::Comma)) {
2917 Parser.Lex(); // Eat the comma.
2919 // Parse and remember the operand.
2920 if (parseOperand(Operands, Mnemonic)) {
2921 Parser.EatToEndOfStatement();
2927 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2928 Parser.EatToEndOfStatement();
2929 return TokError("unexpected token in argument list");
2932 Parser.Lex(); // Consume the EndOfStatement
2934 // Some instructions, mostly Thumb, have forms for the same mnemonic that
2935 // do and don't have a cc_out optional-def operand. With some spot-checks
2936 // of the operand list, we can figure out which variant we're trying to
2937 // parse and adjust accordingly before actually matching. Reason number
2938 // #317 the table driven matcher doesn't fit well with the ARM instruction
2940 if (shouldOmitCCOutOperand(Mnemonic, Operands)) {
2941 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2942 Operands.erase(Operands.begin() + 1);
2946 // ARM mode 'blx' need special handling, as the register operand version
2947 // is predicable, but the label operand version is not. So, we can't rely
2948 // on the Mnemonic based checking to correctly figure out when to put
2949 // a CondCode operand in the list. If we're trying to match the label
2950 // version, remove the CondCode operand here.
2951 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2952 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2953 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2954 Operands.erase(Operands.begin() + 1);
2958 // The vector-compare-to-zero instructions have a literal token "#0" at
2959 // the end that comes to here as an immediate operand. Convert it to a
2960 // token to play nicely with the matcher.
2961 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
2962 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
2963 static_cast<ARMOperand*>(Operands[5])->isImm()) {
2964 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
2965 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
2966 if (CE && CE->getValue() == 0) {
2967 Operands.erase(Operands.begin() + 5);
2968 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
2975 // Validate context-sensitive operand constraints.
2976 // FIXME: We would really like to be able to tablegen'erate this.
2978 validateInstruction(MCInst &Inst,
2979 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2980 switch (Inst.getOpcode()) {
2983 case ARM::LDRD_POST:
2985 // Rt2 must be Rt + 1.
2986 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2987 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2989 return Error(Operands[3]->getStartLoc(),
2990 "destination operands must be sequential");
2994 // Rt2 must be Rt + 1.
2995 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2996 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2998 return Error(Operands[3]->getStartLoc(),
2999 "source operands must be sequential");
3003 case ARM::STRD_POST:
3005 // Rt2 must be Rt + 1.
3006 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3007 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3009 return Error(Operands[3]->getStartLoc(),
3010 "source operands must be sequential");
3015 // width must be in range [1, 32-lsb]
3016 unsigned lsb = Inst.getOperand(2).getImm();
3017 unsigned widthm1 = Inst.getOperand(3).getImm();
3018 if (widthm1 >= 32 - lsb)
3019 return Error(Operands[5]->getStartLoc(),
3020 "bitfield width must be in range [1,32-lsb]");
3024 // Thumb LDM instructions are writeback iff the base register is not
3025 // in the register list.
3026 unsigned Rn = Inst.getOperand(0).getReg();
3027 bool doesWriteback = true;
3028 for (unsigned i = 3; i < Inst.getNumOperands(); ++i) {
3029 unsigned Reg = Inst.getOperand(i).getReg();
3031 doesWriteback = false;
3032 // Anything other than a low register isn't legal here.
3033 if (!isARMLowRegister(Reg))
3034 return Error(Operands[4]->getStartLoc(),
3035 "registers must be in range r0-r7");
3037 // If we should have writeback, then there should be a '!' token.
3038 if (doesWriteback &&
3039 (!static_cast<ARMOperand*>(Operands[3])->isToken() ||
3040 static_cast<ARMOperand*>(Operands[3])->getToken() != "!"))
3041 return Error(Operands[2]->getStartLoc(),
3042 "writeback operator '!' expected");
3052 processInstruction(MCInst &Inst,
3053 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3054 switch (Inst.getOpcode()) {
3055 case ARM::LDMIA_UPD:
3056 // If this is a load of a single register via a 'pop', then we should use
3057 // a post-indexed LDR instruction instead, per the ARM ARM.
3058 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3059 Inst.getNumOperands() == 5) {
3061 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3062 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3063 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3064 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3065 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3066 TmpInst.addOperand(MCOperand::CreateImm(4));
3067 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3068 TmpInst.addOperand(Inst.getOperand(3));
3072 case ARM::STMDB_UPD:
3073 // If this is a store of a single register via a 'push', then we should use
3074 // a pre-indexed STR instruction instead, per the ARM ARM.
3075 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3076 Inst.getNumOperands() == 5) {
3078 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3079 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3080 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3081 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3082 TmpInst.addOperand(MCOperand::CreateImm(-4));
3083 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3084 TmpInst.addOperand(Inst.getOperand(3));
3089 // If the immediate is in the range 0-7, we really wanted tADDi3.
3090 if (Inst.getOperand(3).getImm() < 8)
3091 Inst.setOpcode(ARM::tADDi3);
3094 // If the conditional is AL, we really want tB.
3095 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3096 Inst.setOpcode(ARM::tB);
3101 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3102 // the ARMInsts array) instead. Getting that here requires awkward
3103 // API changes, though. Better way?
3105 extern MCInstrDesc ARMInsts[];
3107 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3108 return ARMInsts[Opcode];
3111 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3112 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3113 // suffix depending on whether they're in an IT block or not.
3114 unsigned Opc = Inst.getOpcode();
3115 MCInstrDesc &MCID = getInstDesc(Opc);
3116 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3117 assert(MCID.hasOptionalDef() &&
3118 "optionally flag setting instruction missing optional def operand");
3119 assert(MCID.NumOperands == Inst.getNumOperands() &&
3120 "operand count mismatch!");
3121 // Find the optional-def operand (cc_out).
3124 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3127 // If we're parsing Thumb1, reject it completely.
3128 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3129 return Match_MnemonicFail;
3130 // If we're parsing Thumb2, which form is legal depends on whether we're
3132 // FIXME: We don't yet do IT blocks, so just always consider it to be
3133 // that we aren't in one until we do.
3134 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3135 return Match_RequiresITBlock;
3137 // Some high-register supporting Thumb1 encodings only allow both registers
3138 // to be from r0-r7 when in Thumb2.
3139 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3140 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3141 isARMLowRegister(Inst.getOperand(2).getReg()))
3142 return Match_RequiresThumb2;
3143 // Others only require ARMv6 or later.
3144 else if (Opc == ARM::tMOVr && isThumbOne() &&
3145 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3146 isARMLowRegister(Inst.getOperand(1).getReg()))
3147 return Match_RequiresV6;
3148 return Match_Success;
3152 MatchAndEmitInstruction(SMLoc IDLoc,
3153 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3157 unsigned MatchResult;
3158 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3159 switch (MatchResult) {
3162 // Context sensitive operand constraints aren't handled by the matcher,
3163 // so check them here.
3164 if (validateInstruction(Inst, Operands))
3167 // Some instructions need post-processing to, for example, tweak which
3168 // encoding is selected.
3169 processInstruction(Inst, Operands);
3171 Out.EmitInstruction(Inst);
3173 case Match_MissingFeature:
3174 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3176 case Match_InvalidOperand: {
3177 SMLoc ErrorLoc = IDLoc;
3178 if (ErrorInfo != ~0U) {
3179 if (ErrorInfo >= Operands.size())
3180 return Error(IDLoc, "too few operands for instruction");
3182 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3183 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3186 return Error(ErrorLoc, "invalid operand for instruction");
3188 case Match_MnemonicFail:
3189 return Error(IDLoc, "invalid instruction");
3190 case Match_ConversionFail:
3191 return Error(IDLoc, "unable to convert operands to instruction");
3192 case Match_RequiresITBlock:
3193 return Error(IDLoc, "instruction only valid inside IT block");
3194 case Match_RequiresV6:
3195 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3196 case Match_RequiresThumb2:
3197 return Error(IDLoc, "instruction variant requires Thumb2");
3200 llvm_unreachable("Implement any new match types added!");
3204 /// parseDirective parses the arm specific directives
3205 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3206 StringRef IDVal = DirectiveID.getIdentifier();
3207 if (IDVal == ".word")
3208 return parseDirectiveWord(4, DirectiveID.getLoc());
3209 else if (IDVal == ".thumb")
3210 return parseDirectiveThumb(DirectiveID.getLoc());
3211 else if (IDVal == ".thumb_func")
3212 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3213 else if (IDVal == ".code")
3214 return parseDirectiveCode(DirectiveID.getLoc());
3215 else if (IDVal == ".syntax")
3216 return parseDirectiveSyntax(DirectiveID.getLoc());
3220 /// parseDirectiveWord
3221 /// ::= .word [ expression (, expression)* ]
3222 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3223 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3225 const MCExpr *Value;
3226 if (getParser().ParseExpression(Value))
3229 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3231 if (getLexer().is(AsmToken::EndOfStatement))
3234 // FIXME: Improve diagnostic.
3235 if (getLexer().isNot(AsmToken::Comma))
3236 return Error(L, "unexpected token in directive");
3245 /// parseDirectiveThumb
3247 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3248 if (getLexer().isNot(AsmToken::EndOfStatement))
3249 return Error(L, "unexpected token in directive");
3252 // TODO: set thumb mode
3253 // TODO: tell the MC streamer the mode
3254 // getParser().getStreamer().Emit???();
3258 /// parseDirectiveThumbFunc
3259 /// ::= .thumbfunc symbol_name
3260 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3261 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3262 bool isMachO = MAI.hasSubsectionsViaSymbols();
3265 // Darwin asm has function name after .thumb_func direction
3268 const AsmToken &Tok = Parser.getTok();
3269 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3270 return Error(L, "unexpected token in .thumb_func directive");
3271 Name = Tok.getString();
3272 Parser.Lex(); // Consume the identifier token.
3275 if (getLexer().isNot(AsmToken::EndOfStatement))
3276 return Error(L, "unexpected token in directive");
3279 // FIXME: assuming function name will be the line following .thumb_func
3281 Name = Parser.getTok().getString();
3284 // Mark symbol as a thumb symbol.
3285 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3286 getParser().getStreamer().EmitThumbFunc(Func);
3290 /// parseDirectiveSyntax
3291 /// ::= .syntax unified | divided
3292 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3293 const AsmToken &Tok = Parser.getTok();
3294 if (Tok.isNot(AsmToken::Identifier))
3295 return Error(L, "unexpected token in .syntax directive");
3296 StringRef Mode = Tok.getString();
3297 if (Mode == "unified" || Mode == "UNIFIED")
3299 else if (Mode == "divided" || Mode == "DIVIDED")
3300 return Error(L, "'.syntax divided' arm asssembly not supported");
3302 return Error(L, "unrecognized syntax mode in .syntax directive");
3304 if (getLexer().isNot(AsmToken::EndOfStatement))
3305 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3308 // TODO tell the MC streamer the mode
3309 // getParser().getStreamer().Emit???();
3313 /// parseDirectiveCode
3314 /// ::= .code 16 | 32
3315 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3316 const AsmToken &Tok = Parser.getTok();
3317 if (Tok.isNot(AsmToken::Integer))
3318 return Error(L, "unexpected token in .code directive");
3319 int64_t Val = Parser.getTok().getIntVal();
3325 return Error(L, "invalid operand to .code directive");
3327 if (getLexer().isNot(AsmToken::EndOfStatement))
3328 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3334 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3339 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3346 extern "C" void LLVMInitializeARMAsmLexer();
3348 /// Force static initialization.
3349 extern "C" void LLVMInitializeARMAsmParser() {
3350 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3351 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3352 LLVMInitializeARMAsmLexer();
3355 #define GET_REGISTER_MATCHER
3356 #define GET_MATCHER_IMPLEMENTATION
3357 #include "ARMGenAsmMatcher.inc"