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;
82 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
83 setAvailableFeatures(FB);
86 /// @name Auto-generated Match Functions
89 #define GET_ASSEMBLER_HEADER
90 #include "ARMGenAsmMatcher.inc"
94 OperandMatchResultTy parseCoprocNumOperand(
95 SmallVectorImpl<MCParsedAsmOperand*>&);
96 OperandMatchResultTy parseCoprocRegOperand(
97 SmallVectorImpl<MCParsedAsmOperand*>&);
98 OperandMatchResultTy parseMemBarrierOptOperand(
99 SmallVectorImpl<MCParsedAsmOperand*>&);
100 OperandMatchResultTy parseProcIFlagsOperand(
101 SmallVectorImpl<MCParsedAsmOperand*>&);
102 OperandMatchResultTy parseMSRMaskOperand(
103 SmallVectorImpl<MCParsedAsmOperand*>&);
104 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
105 StringRef Op, int Low, int High);
106 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
107 return parsePKHImm(O, "lsl", 0, 31);
109 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
110 return parsePKHImm(O, "asr", 1, 32);
112 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
113 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
114 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
115 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
116 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
118 // Asm Match Converter Methods
119 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
120 const SmallVectorImpl<MCParsedAsmOperand*> &);
121 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
122 const SmallVectorImpl<MCParsedAsmOperand*> &);
123 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
124 const SmallVectorImpl<MCParsedAsmOperand*> &);
125 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
126 const SmallVectorImpl<MCParsedAsmOperand*> &);
127 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
128 const SmallVectorImpl<MCParsedAsmOperand*> &);
129 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
130 const SmallVectorImpl<MCParsedAsmOperand*> &);
131 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
132 const SmallVectorImpl<MCParsedAsmOperand*> &);
134 bool validateInstruction(MCInst &Inst,
135 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
138 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
139 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
140 MCAsmParserExtension::Initialize(_Parser);
142 // Initialize the set of available features.
143 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
146 // Implementation of the MCTargetAsmParser interface:
147 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
148 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
149 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
150 bool ParseDirective(AsmToken DirectiveID);
152 bool MatchAndEmitInstruction(SMLoc IDLoc,
153 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
156 } // end anonymous namespace
160 /// ARMOperand - Instances of this class represent a parsed ARM machine
162 class ARMOperand : public MCParsedAsmOperand {
186 SMLoc StartLoc, EndLoc;
187 SmallVector<unsigned, 8> Registers;
191 ARMCC::CondCodes Val;
203 ARM_PROC::IFlags Val;
223 /// Combined record for all forms of ARM address expressions.
226 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
228 const MCConstantExpr *OffsetImm; // Offset immediate value
229 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
230 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
231 unsigned ShiftImm; // shift for OffsetReg.
232 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
238 ARM_AM::ShiftOpc ShiftTy;
247 ARM_AM::ShiftOpc ShiftTy;
253 ARM_AM::ShiftOpc ShiftTy;
266 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
268 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
270 StartLoc = o.StartLoc;
284 case DPRRegisterList:
285 case SPRRegisterList:
286 Registers = o.Registers;
301 case PostIndexRegister:
302 PostIdxReg = o.PostIdxReg;
310 case ShifterImmediate:
311 ShifterImm = o.ShifterImm;
313 case ShiftedRegister:
314 RegShiftedReg = o.RegShiftedReg;
316 case ShiftedImmediate:
317 RegShiftedImm = o.RegShiftedImm;
319 case RotateImmediate:
322 case BitfieldDescriptor:
323 Bitfield = o.Bitfield;
328 /// getStartLoc - Get the location of the first token of this operand.
329 SMLoc getStartLoc() const { return StartLoc; }
330 /// getEndLoc - Get the location of the last token of this operand.
331 SMLoc getEndLoc() const { return EndLoc; }
333 ARMCC::CondCodes getCondCode() const {
334 assert(Kind == CondCode && "Invalid access!");
338 unsigned getCoproc() const {
339 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
343 StringRef getToken() const {
344 assert(Kind == Token && "Invalid access!");
345 return StringRef(Tok.Data, Tok.Length);
348 unsigned getReg() const {
349 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
353 const SmallVectorImpl<unsigned> &getRegList() const {
354 assert((Kind == RegisterList || Kind == DPRRegisterList ||
355 Kind == SPRRegisterList) && "Invalid access!");
359 const MCExpr *getImm() const {
360 assert(Kind == Immediate && "Invalid access!");
364 ARM_MB::MemBOpt getMemBarrierOpt() const {
365 assert(Kind == MemBarrierOpt && "Invalid access!");
369 ARM_PROC::IFlags getProcIFlags() const {
370 assert(Kind == ProcIFlags && "Invalid access!");
374 unsigned getMSRMask() const {
375 assert(Kind == MSRMask && "Invalid access!");
379 bool isCoprocNum() const { return Kind == CoprocNum; }
380 bool isCoprocReg() const { return Kind == CoprocReg; }
381 bool isCondCode() const { return Kind == CondCode; }
382 bool isCCOut() const { return Kind == CCOut; }
383 bool isImm() const { return Kind == Immediate; }
384 bool isImm0_255() const {
385 if (Kind != Immediate)
387 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
388 if (!CE) return false;
389 int64_t Value = CE->getValue();
390 return Value >= 0 && Value < 256;
392 bool isImm0_7() const {
393 if (Kind != Immediate)
395 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
396 if (!CE) return false;
397 int64_t Value = CE->getValue();
398 return Value >= 0 && Value < 8;
400 bool isImm0_15() const {
401 if (Kind != Immediate)
403 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
404 if (!CE) return false;
405 int64_t Value = CE->getValue();
406 return Value >= 0 && Value < 16;
408 bool isImm0_31() const {
409 if (Kind != Immediate)
411 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
412 if (!CE) return false;
413 int64_t Value = CE->getValue();
414 return Value >= 0 && Value < 32;
416 bool isImm1_16() const {
417 if (Kind != Immediate)
419 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
420 if (!CE) return false;
421 int64_t Value = CE->getValue();
422 return Value > 0 && Value < 17;
424 bool isImm1_32() const {
425 if (Kind != Immediate)
427 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
428 if (!CE) return false;
429 int64_t Value = CE->getValue();
430 return Value > 0 && Value < 33;
432 bool isImm0_65535() const {
433 if (Kind != Immediate)
435 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
436 if (!CE) return false;
437 int64_t Value = CE->getValue();
438 return Value >= 0 && Value < 65536;
440 bool isImm0_65535Expr() const {
441 if (Kind != Immediate)
443 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
444 // If it's not a constant expression, it'll generate a fixup and be
446 if (!CE) return true;
447 int64_t Value = CE->getValue();
448 return Value >= 0 && Value < 65536;
450 bool isImm24bit() const {
451 if (Kind != Immediate)
453 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
454 if (!CE) return false;
455 int64_t Value = CE->getValue();
456 return Value >= 0 && Value <= 0xffffff;
458 bool isPKHLSLImm() const {
459 if (Kind != Immediate)
461 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
462 if (!CE) return false;
463 int64_t Value = CE->getValue();
464 return Value >= 0 && Value < 32;
466 bool isPKHASRImm() const {
467 if (Kind != Immediate)
469 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
470 if (!CE) return false;
471 int64_t Value = CE->getValue();
472 return Value > 0 && Value <= 32;
474 bool isARMSOImm() const {
475 if (Kind != Immediate)
477 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
478 if (!CE) return false;
479 int64_t Value = CE->getValue();
480 return ARM_AM::getSOImmVal(Value) != -1;
482 bool isT2SOImm() const {
483 if (Kind != Immediate)
485 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
486 if (!CE) return false;
487 int64_t Value = CE->getValue();
488 return ARM_AM::getT2SOImmVal(Value) != -1;
490 bool isSetEndImm() const {
491 if (Kind != Immediate)
493 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
494 if (!CE) return false;
495 int64_t Value = CE->getValue();
496 return Value == 1 || Value == 0;
498 bool isReg() const { return Kind == Register; }
499 bool isRegList() const { return Kind == RegisterList; }
500 bool isDPRRegList() const { return Kind == DPRRegisterList; }
501 bool isSPRRegList() const { return Kind == SPRRegisterList; }
502 bool isToken() const { return Kind == Token; }
503 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
504 bool isMemory() const { return Kind == Memory; }
505 bool isShifterImm() const { return Kind == ShifterImmediate; }
506 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
507 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
508 bool isRotImm() const { return Kind == RotateImmediate; }
509 bool isBitfield() const { return Kind == BitfieldDescriptor; }
510 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
511 bool isPostIdxReg() const {
512 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
514 bool isMemNoOffset() const {
517 // No offset of any kind.
518 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
520 bool isAddrMode2() const {
523 // Check for register offset.
524 if (Mem.OffsetRegNum) return true;
525 // Immediate offset in range [-4095, 4095].
526 if (!Mem.OffsetImm) return true;
527 int64_t Val = Mem.OffsetImm->getValue();
528 return Val > -4096 && Val < 4096;
530 bool isAM2OffsetImm() const {
531 if (Kind != Immediate)
533 // Immediate offset in range [-4095, 4095].
534 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
535 if (!CE) return false;
536 int64_t Val = CE->getValue();
537 return Val > -4096 && Val < 4096;
539 bool isAddrMode3() const {
542 // No shifts are legal for AM3.
543 if (Mem.ShiftType != ARM_AM::no_shift) return false;
544 // Check for register offset.
545 if (Mem.OffsetRegNum) return true;
546 // Immediate offset in range [-255, 255].
547 if (!Mem.OffsetImm) return true;
548 int64_t Val = Mem.OffsetImm->getValue();
549 return Val > -256 && Val < 256;
551 bool isAM3Offset() const {
552 if (Kind != Immediate && Kind != PostIndexRegister)
554 if (Kind == PostIndexRegister)
555 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
556 // Immediate offset in range [-255, 255].
557 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
558 if (!CE) return false;
559 int64_t Val = CE->getValue();
560 return Val > -256 && Val < 256;
562 bool isAddrMode5() const {
565 // Check for register offset.
566 if (Mem.OffsetRegNum) return false;
567 // Immediate offset in range [-1020, 1020] and a multiple of 4.
568 if (!Mem.OffsetImm) return true;
569 int64_t Val = Mem.OffsetImm->getValue();
570 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
572 bool isMemRegOffset() const {
573 if (Kind != Memory || !Mem.OffsetRegNum)
577 bool isMemThumbRR() const {
578 // Thumb reg+reg addressing is simple. Just two registers, a base and
579 // an offset. No shifts, negations or any other complicating factors.
580 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
581 Mem.ShiftType != ARM_AM::no_shift)
585 bool isMemImm8Offset() const {
586 if (Kind != Memory || Mem.OffsetRegNum != 0)
588 // Immediate offset in range [-255, 255].
589 if (!Mem.OffsetImm) return true;
590 int64_t Val = Mem.OffsetImm->getValue();
591 return Val > -256 && Val < 256;
593 bool isMemImm12Offset() const {
594 // If we have an immediate that's not a constant, treat it as a label
595 // reference needing a fixup. If it is a constant, it's something else
597 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
600 if (Kind != Memory || Mem.OffsetRegNum != 0)
602 // Immediate offset in range [-4095, 4095].
603 if (!Mem.OffsetImm) return true;
604 int64_t Val = Mem.OffsetImm->getValue();
605 return Val > -4096 && Val < 4096;
607 bool isPostIdxImm8() const {
608 if (Kind != Immediate)
610 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
611 if (!CE) return false;
612 int64_t Val = CE->getValue();
613 return Val > -256 && Val < 256;
616 bool isMSRMask() const { return Kind == MSRMask; }
617 bool isProcIFlags() const { return Kind == ProcIFlags; }
619 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
620 // Add as immediates when possible. Null MCExpr = 0.
622 Inst.addOperand(MCOperand::CreateImm(0));
623 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
624 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
626 Inst.addOperand(MCOperand::CreateExpr(Expr));
629 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
630 assert(N == 2 && "Invalid number of operands!");
631 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
632 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
633 Inst.addOperand(MCOperand::CreateReg(RegNum));
636 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
637 assert(N == 1 && "Invalid number of operands!");
638 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
641 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
642 assert(N == 1 && "Invalid number of operands!");
643 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
646 void addCCOutOperands(MCInst &Inst, unsigned N) const {
647 assert(N == 1 && "Invalid number of operands!");
648 Inst.addOperand(MCOperand::CreateReg(getReg()));
651 void addRegOperands(MCInst &Inst, unsigned N) const {
652 assert(N == 1 && "Invalid number of operands!");
653 Inst.addOperand(MCOperand::CreateReg(getReg()));
656 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
657 assert(N == 3 && "Invalid number of operands!");
658 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
659 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
660 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
661 Inst.addOperand(MCOperand::CreateImm(
662 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
665 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
666 assert(N == 2 && "Invalid number of operands!");
667 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
668 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
669 Inst.addOperand(MCOperand::CreateImm(
670 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
674 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
675 assert(N == 1 && "Invalid number of operands!");
676 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
680 void addRegListOperands(MCInst &Inst, unsigned N) const {
681 assert(N == 1 && "Invalid number of operands!");
682 const SmallVectorImpl<unsigned> &RegList = getRegList();
683 for (SmallVectorImpl<unsigned>::const_iterator
684 I = RegList.begin(), E = RegList.end(); I != E; ++I)
685 Inst.addOperand(MCOperand::CreateReg(*I));
688 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
689 addRegListOperands(Inst, N);
692 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
693 addRegListOperands(Inst, N);
696 void addRotImmOperands(MCInst &Inst, unsigned N) const {
697 assert(N == 1 && "Invalid number of operands!");
698 // Encoded as val>>3. The printer handles display as 8, 16, 24.
699 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
702 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
703 assert(N == 1 && "Invalid number of operands!");
704 // Munge the lsb/width into a bitfield mask.
705 unsigned lsb = Bitfield.LSB;
706 unsigned width = Bitfield.Width;
707 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
708 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
709 (32 - (lsb + width)));
710 Inst.addOperand(MCOperand::CreateImm(Mask));
713 void addImmOperands(MCInst &Inst, unsigned N) const {
714 assert(N == 1 && "Invalid number of operands!");
715 addExpr(Inst, getImm());
718 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
719 assert(N == 1 && "Invalid number of operands!");
720 addExpr(Inst, getImm());
723 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
724 assert(N == 1 && "Invalid number of operands!");
725 addExpr(Inst, getImm());
728 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
729 assert(N == 1 && "Invalid number of operands!");
730 addExpr(Inst, getImm());
733 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
734 assert(N == 1 && "Invalid number of operands!");
735 addExpr(Inst, getImm());
738 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
739 assert(N == 1 && "Invalid number of operands!");
740 // The constant encodes as the immediate-1, and we store in the instruction
741 // the bits as encoded, so subtract off one here.
742 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
743 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
746 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
747 assert(N == 1 && "Invalid number of operands!");
748 // The constant encodes as the immediate-1, and we store in the instruction
749 // the bits as encoded, so subtract off one here.
750 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
751 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
754 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
755 assert(N == 1 && "Invalid number of operands!");
756 addExpr(Inst, getImm());
759 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
760 assert(N == 1 && "Invalid number of operands!");
761 addExpr(Inst, getImm());
764 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
765 assert(N == 1 && "Invalid number of operands!");
766 addExpr(Inst, getImm());
769 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
770 assert(N == 1 && "Invalid number of operands!");
771 addExpr(Inst, getImm());
774 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
775 assert(N == 1 && "Invalid number of operands!");
776 // An ASR value of 32 encodes as 0, so that's how we want to add it to
777 // the instruction as well.
778 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
779 int Val = CE->getValue();
780 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
783 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
784 assert(N == 1 && "Invalid number of operands!");
785 addExpr(Inst, getImm());
788 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
789 assert(N == 1 && "Invalid number of operands!");
790 addExpr(Inst, getImm());
793 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
794 assert(N == 1 && "Invalid number of operands!");
795 addExpr(Inst, getImm());
798 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
799 assert(N == 1 && "Invalid number of operands!");
800 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
803 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
804 assert(N == 1 && "Invalid number of operands!");
805 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
808 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
809 assert(N == 3 && "Invalid number of operands!");
810 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
811 if (!Mem.OffsetRegNum) {
812 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
813 // Special case for #-0
814 if (Val == INT32_MIN) Val = 0;
815 if (Val < 0) Val = -Val;
816 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
818 // For register offset, we encode the shift type and negation flag
820 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
823 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
824 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
825 Inst.addOperand(MCOperand::CreateImm(Val));
828 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
829 assert(N == 2 && "Invalid number of operands!");
830 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
831 assert(CE && "non-constant AM2OffsetImm operand!");
832 int32_t Val = CE->getValue();
833 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
834 // Special case for #-0
835 if (Val == INT32_MIN) Val = 0;
836 if (Val < 0) Val = -Val;
837 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
838 Inst.addOperand(MCOperand::CreateReg(0));
839 Inst.addOperand(MCOperand::CreateImm(Val));
842 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
843 assert(N == 3 && "Invalid number of operands!");
844 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
845 if (!Mem.OffsetRegNum) {
846 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
847 // Special case for #-0
848 if (Val == INT32_MIN) Val = 0;
849 if (Val < 0) Val = -Val;
850 Val = ARM_AM::getAM3Opc(AddSub, Val);
852 // For register offset, we encode the shift type and negation flag
854 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
856 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
857 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
858 Inst.addOperand(MCOperand::CreateImm(Val));
861 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
862 assert(N == 2 && "Invalid number of operands!");
863 if (Kind == PostIndexRegister) {
865 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
866 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
867 Inst.addOperand(MCOperand::CreateImm(Val));
871 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
872 int32_t Val = CE->getValue();
873 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
874 // Special case for #-0
875 if (Val == INT32_MIN) Val = 0;
876 if (Val < 0) Val = -Val;
877 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
878 Inst.addOperand(MCOperand::CreateReg(0));
879 Inst.addOperand(MCOperand::CreateImm(Val));
882 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
883 assert(N == 2 && "Invalid number of operands!");
884 // The lower two bits are always zero and as such are not encoded.
885 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
886 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
887 // Special case for #-0
888 if (Val == INT32_MIN) Val = 0;
889 if (Val < 0) Val = -Val;
890 Val = ARM_AM::getAM5Opc(AddSub, Val);
891 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
892 Inst.addOperand(MCOperand::CreateImm(Val));
895 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
896 assert(N == 2 && "Invalid number of operands!");
897 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
898 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
899 Inst.addOperand(MCOperand::CreateImm(Val));
902 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
903 assert(N == 2 && "Invalid number of operands!");
904 // If this is an immediate, it's a label reference.
905 if (Kind == Immediate) {
906 addExpr(Inst, getImm());
907 Inst.addOperand(MCOperand::CreateImm(0));
911 // Otherwise, it's a normal memory reg+offset.
912 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
913 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
914 Inst.addOperand(MCOperand::CreateImm(Val));
917 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
918 assert(N == 3 && "Invalid number of operands!");
919 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
920 Mem.ShiftImm, Mem.ShiftType);
921 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
922 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
923 Inst.addOperand(MCOperand::CreateImm(Val));
926 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
927 assert(N == 2 && "Invalid number of operands!");
928 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
929 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
932 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
933 assert(N == 1 && "Invalid number of operands!");
934 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
935 assert(CE && "non-constant post-idx-imm8 operand!");
936 int Imm = CE->getValue();
937 bool isAdd = Imm >= 0;
938 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
939 Inst.addOperand(MCOperand::CreateImm(Imm));
942 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
943 assert(N == 2 && "Invalid number of operands!");
944 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
945 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
948 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
949 assert(N == 2 && "Invalid number of operands!");
950 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
951 // The sign, shift type, and shift amount are encoded in a single operand
952 // using the AM2 encoding helpers.
953 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
954 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
956 Inst.addOperand(MCOperand::CreateImm(Imm));
959 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
960 assert(N == 1 && "Invalid number of operands!");
961 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
964 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
965 assert(N == 1 && "Invalid number of operands!");
966 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
969 virtual void print(raw_ostream &OS) const;
971 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
972 ARMOperand *Op = new ARMOperand(CondCode);
979 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
980 ARMOperand *Op = new ARMOperand(CoprocNum);
981 Op->Cop.Val = CopVal;
987 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
988 ARMOperand *Op = new ARMOperand(CoprocReg);
989 Op->Cop.Val = CopVal;
995 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
996 ARMOperand *Op = new ARMOperand(CCOut);
997 Op->Reg.RegNum = RegNum;
1003 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1004 ARMOperand *Op = new ARMOperand(Token);
1005 Op->Tok.Data = Str.data();
1006 Op->Tok.Length = Str.size();
1012 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1013 ARMOperand *Op = new ARMOperand(Register);
1014 Op->Reg.RegNum = RegNum;
1020 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1025 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1026 Op->RegShiftedReg.ShiftTy = ShTy;
1027 Op->RegShiftedReg.SrcReg = SrcReg;
1028 Op->RegShiftedReg.ShiftReg = ShiftReg;
1029 Op->RegShiftedReg.ShiftImm = ShiftImm;
1035 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1039 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1040 Op->RegShiftedImm.ShiftTy = ShTy;
1041 Op->RegShiftedImm.SrcReg = SrcReg;
1042 Op->RegShiftedImm.ShiftImm = ShiftImm;
1048 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1050 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1051 Op->ShifterImm.isASR = isASR;
1052 Op->ShifterImm.Imm = Imm;
1058 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1059 ARMOperand *Op = new ARMOperand(RotateImmediate);
1060 Op->RotImm.Imm = Imm;
1066 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1068 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1069 Op->Bitfield.LSB = LSB;
1070 Op->Bitfield.Width = Width;
1077 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1078 SMLoc StartLoc, SMLoc EndLoc) {
1079 KindTy Kind = RegisterList;
1081 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1082 contains(Regs.front().first))
1083 Kind = DPRRegisterList;
1084 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1085 contains(Regs.front().first))
1086 Kind = SPRRegisterList;
1088 ARMOperand *Op = new ARMOperand(Kind);
1089 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1090 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1091 Op->Registers.push_back(I->first);
1092 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1093 Op->StartLoc = StartLoc;
1094 Op->EndLoc = EndLoc;
1098 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1099 ARMOperand *Op = new ARMOperand(Immediate);
1106 static ARMOperand *CreateMem(unsigned BaseRegNum,
1107 const MCConstantExpr *OffsetImm,
1108 unsigned OffsetRegNum,
1109 ARM_AM::ShiftOpc ShiftType,
1113 ARMOperand *Op = new ARMOperand(Memory);
1114 Op->Mem.BaseRegNum = BaseRegNum;
1115 Op->Mem.OffsetImm = OffsetImm;
1116 Op->Mem.OffsetRegNum = OffsetRegNum;
1117 Op->Mem.ShiftType = ShiftType;
1118 Op->Mem.ShiftImm = ShiftImm;
1119 Op->Mem.isNegative = isNegative;
1125 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1126 ARM_AM::ShiftOpc ShiftTy,
1129 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1130 Op->PostIdxReg.RegNum = RegNum;
1131 Op->PostIdxReg.isAdd = isAdd;
1132 Op->PostIdxReg.ShiftTy = ShiftTy;
1133 Op->PostIdxReg.ShiftImm = ShiftImm;
1139 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1140 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1141 Op->MBOpt.Val = Opt;
1147 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1148 ARMOperand *Op = new ARMOperand(ProcIFlags);
1149 Op->IFlags.Val = IFlags;
1155 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1156 ARMOperand *Op = new ARMOperand(MSRMask);
1157 Op->MMask.Val = MMask;
1164 } // end anonymous namespace.
1166 void ARMOperand::print(raw_ostream &OS) const {
1169 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1172 OS << "<ccout " << getReg() << ">";
1175 OS << "<coprocessor number: " << getCoproc() << ">";
1178 OS << "<coprocessor register: " << getCoproc() << ">";
1181 OS << "<mask: " << getMSRMask() << ">";
1184 getImm()->print(OS);
1187 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1191 << " base:" << Mem.BaseRegNum;
1194 case PostIndexRegister:
1195 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1196 << PostIdxReg.RegNum;
1197 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1198 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1199 << PostIdxReg.ShiftImm;
1203 OS << "<ARM_PROC::";
1204 unsigned IFlags = getProcIFlags();
1205 for (int i=2; i >= 0; --i)
1206 if (IFlags & (1 << i))
1207 OS << ARM_PROC::IFlagsToString(1 << i);
1212 OS << "<register " << getReg() << ">";
1214 case ShifterImmediate:
1215 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1216 << " #" << ShifterImm.Imm << ">";
1218 case ShiftedRegister:
1219 OS << "<so_reg_reg "
1220 << RegShiftedReg.SrcReg
1221 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1222 << ", " << RegShiftedReg.ShiftReg << ", "
1223 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1226 case ShiftedImmediate:
1227 OS << "<so_reg_imm "
1228 << RegShiftedImm.SrcReg
1229 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1230 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1233 case RotateImmediate:
1234 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1236 case BitfieldDescriptor:
1237 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1238 << ", width: " << Bitfield.Width << ">";
1241 case DPRRegisterList:
1242 case SPRRegisterList: {
1243 OS << "<register_list ";
1245 const SmallVectorImpl<unsigned> &RegList = getRegList();
1246 for (SmallVectorImpl<unsigned>::const_iterator
1247 I = RegList.begin(), E = RegList.end(); I != E; ) {
1249 if (++I < E) OS << ", ";
1256 OS << "'" << getToken() << "'";
1261 /// @name Auto-generated Match Functions
1264 static unsigned MatchRegisterName(StringRef Name);
1268 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1269 SMLoc &StartLoc, SMLoc &EndLoc) {
1270 RegNo = tryParseRegister();
1272 return (RegNo == (unsigned)-1);
1275 /// Try to parse a register name. The token must be an Identifier when called,
1276 /// and if it is a register name the token is eaten and the register number is
1277 /// returned. Otherwise return -1.
1279 int ARMAsmParser::tryParseRegister() {
1280 const AsmToken &Tok = Parser.getTok();
1281 if (Tok.isNot(AsmToken::Identifier)) return -1;
1283 // FIXME: Validate register for the current architecture; we have to do
1284 // validation later, so maybe there is no need for this here.
1285 std::string upperCase = Tok.getString().str();
1286 std::string lowerCase = LowercaseString(upperCase);
1287 unsigned RegNum = MatchRegisterName(lowerCase);
1289 RegNum = StringSwitch<unsigned>(lowerCase)
1290 .Case("r13", ARM::SP)
1291 .Case("r14", ARM::LR)
1292 .Case("r15", ARM::PC)
1293 .Case("ip", ARM::R12)
1296 if (!RegNum) return -1;
1298 Parser.Lex(); // Eat identifier token.
1302 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1303 // If a recoverable error occurs, return 1. If an irrecoverable error
1304 // occurs, return -1. An irrecoverable error is one where tokens have been
1305 // consumed in the process of trying to parse the shifter (i.e., when it is
1306 // indeed a shifter operand, but malformed).
1307 int ARMAsmParser::tryParseShiftRegister(
1308 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1309 SMLoc S = Parser.getTok().getLoc();
1310 const AsmToken &Tok = Parser.getTok();
1311 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1313 std::string upperCase = Tok.getString().str();
1314 std::string lowerCase = LowercaseString(upperCase);
1315 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1316 .Case("lsl", ARM_AM::lsl)
1317 .Case("lsr", ARM_AM::lsr)
1318 .Case("asr", ARM_AM::asr)
1319 .Case("ror", ARM_AM::ror)
1320 .Case("rrx", ARM_AM::rrx)
1321 .Default(ARM_AM::no_shift);
1323 if (ShiftTy == ARM_AM::no_shift)
1326 Parser.Lex(); // Eat the operator.
1328 // The source register for the shift has already been added to the
1329 // operand list, so we need to pop it off and combine it into the shifted
1330 // register operand instead.
1331 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1332 if (!PrevOp->isReg())
1333 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1334 int SrcReg = PrevOp->getReg();
1337 if (ShiftTy == ARM_AM::rrx) {
1338 // RRX Doesn't have an explicit shift amount. The encoder expects
1339 // the shift register to be the same as the source register. Seems odd,
1343 // Figure out if this is shifted by a constant or a register (for non-RRX).
1344 if (Parser.getTok().is(AsmToken::Hash)) {
1345 Parser.Lex(); // Eat hash.
1346 SMLoc ImmLoc = Parser.getTok().getLoc();
1347 const MCExpr *ShiftExpr = 0;
1348 if (getParser().ParseExpression(ShiftExpr)) {
1349 Error(ImmLoc, "invalid immediate shift value");
1352 // The expression must be evaluatable as an immediate.
1353 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1355 Error(ImmLoc, "invalid immediate shift value");
1358 // Range check the immediate.
1359 // lsl, ror: 0 <= imm <= 31
1360 // lsr, asr: 0 <= imm <= 32
1361 Imm = CE->getValue();
1363 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1364 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1365 Error(ImmLoc, "immediate shift value out of range");
1368 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1369 ShiftReg = tryParseRegister();
1370 SMLoc L = Parser.getTok().getLoc();
1371 if (ShiftReg == -1) {
1372 Error (L, "expected immediate or register in shift operand");
1376 Error (Parser.getTok().getLoc(),
1377 "expected immediate or register in shift operand");
1382 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1383 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1385 S, Parser.getTok().getLoc()));
1387 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1388 S, Parser.getTok().getLoc()));
1394 /// Try to parse a register name. The token must be an Identifier when called.
1395 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1396 /// if there is a "writeback". 'true' if it's not a register.
1398 /// TODO this is likely to change to allow different register types and or to
1399 /// parse for a specific register type.
1401 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1402 SMLoc S = Parser.getTok().getLoc();
1403 int RegNo = tryParseRegister();
1407 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1409 const AsmToken &ExclaimTok = Parser.getTok();
1410 if (ExclaimTok.is(AsmToken::Exclaim)) {
1411 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1412 ExclaimTok.getLoc()));
1413 Parser.Lex(); // Eat exclaim token
1419 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1420 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1422 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1423 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1425 switch (Name.size()) {
1428 if (Name[0] != CoprocOp)
1445 if (Name[0] != CoprocOp || Name[1] != '1')
1449 case '0': return 10;
1450 case '1': return 11;
1451 case '2': return 12;
1452 case '3': return 13;
1453 case '4': return 14;
1454 case '5': return 15;
1462 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1463 /// token must be an Identifier when called, and if it is a coprocessor
1464 /// number, the token is eaten and the operand is added to the operand list.
1465 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1466 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1467 SMLoc S = Parser.getTok().getLoc();
1468 const AsmToken &Tok = Parser.getTok();
1469 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1471 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1473 return MatchOperand_NoMatch;
1475 Parser.Lex(); // Eat identifier token.
1476 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1477 return MatchOperand_Success;
1480 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1481 /// token must be an Identifier when called, and if it is a coprocessor
1482 /// number, the token is eaten and the operand is added to the operand list.
1483 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1484 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1485 SMLoc S = Parser.getTok().getLoc();
1486 const AsmToken &Tok = Parser.getTok();
1487 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1489 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1491 return MatchOperand_NoMatch;
1493 Parser.Lex(); // Eat identifier token.
1494 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1495 return MatchOperand_Success;
1498 /// Parse a register list, return it if successful else return null. The first
1499 /// token must be a '{' when called.
1501 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1502 assert(Parser.getTok().is(AsmToken::LCurly) &&
1503 "Token is not a Left Curly Brace");
1504 SMLoc S = Parser.getTok().getLoc();
1506 // Read the rest of the registers in the list.
1507 unsigned PrevRegNum = 0;
1508 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1511 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1512 Parser.Lex(); // Eat non-identifier token.
1514 const AsmToken &RegTok = Parser.getTok();
1515 SMLoc RegLoc = RegTok.getLoc();
1516 if (RegTok.isNot(AsmToken::Identifier)) {
1517 Error(RegLoc, "register expected");
1521 int RegNum = tryParseRegister();
1523 Error(RegLoc, "register expected");
1528 int Reg = PrevRegNum;
1531 Registers.push_back(std::make_pair(Reg, RegLoc));
1532 } while (Reg != RegNum);
1534 Registers.push_back(std::make_pair(RegNum, RegLoc));
1537 PrevRegNum = RegNum;
1538 } while (Parser.getTok().is(AsmToken::Comma) ||
1539 Parser.getTok().is(AsmToken::Minus));
1541 // Process the right curly brace of the list.
1542 const AsmToken &RCurlyTok = Parser.getTok();
1543 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1544 Error(RCurlyTok.getLoc(), "'}' expected");
1548 SMLoc E = RCurlyTok.getLoc();
1549 Parser.Lex(); // Eat right curly brace token.
1551 // Verify the register list.
1552 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1553 RI = Registers.begin(), RE = Registers.end();
1555 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1556 bool EmittedWarning = false;
1558 DenseMap<unsigned, bool> RegMap;
1559 RegMap[HighRegNum] = true;
1561 for (++RI; RI != RE; ++RI) {
1562 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1563 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1566 Error(RegInfo.second, "register duplicated in register list");
1570 if (!EmittedWarning && Reg < HighRegNum)
1571 Warning(RegInfo.second,
1572 "register not in ascending order in register list");
1575 HighRegNum = std::max(Reg, HighRegNum);
1578 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1582 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1583 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1584 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1585 SMLoc S = Parser.getTok().getLoc();
1586 const AsmToken &Tok = Parser.getTok();
1587 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1588 StringRef OptStr = Tok.getString();
1590 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1591 .Case("sy", ARM_MB::SY)
1592 .Case("st", ARM_MB::ST)
1593 .Case("sh", ARM_MB::ISH)
1594 .Case("ish", ARM_MB::ISH)
1595 .Case("shst", ARM_MB::ISHST)
1596 .Case("ishst", ARM_MB::ISHST)
1597 .Case("nsh", ARM_MB::NSH)
1598 .Case("un", ARM_MB::NSH)
1599 .Case("nshst", ARM_MB::NSHST)
1600 .Case("unst", ARM_MB::NSHST)
1601 .Case("osh", ARM_MB::OSH)
1602 .Case("oshst", ARM_MB::OSHST)
1606 return MatchOperand_NoMatch;
1608 Parser.Lex(); // Eat identifier token.
1609 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1610 return MatchOperand_Success;
1613 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1614 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1615 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1616 SMLoc S = Parser.getTok().getLoc();
1617 const AsmToken &Tok = Parser.getTok();
1618 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1619 StringRef IFlagsStr = Tok.getString();
1621 unsigned IFlags = 0;
1622 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1623 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1624 .Case("a", ARM_PROC::A)
1625 .Case("i", ARM_PROC::I)
1626 .Case("f", ARM_PROC::F)
1629 // If some specific iflag is already set, it means that some letter is
1630 // present more than once, this is not acceptable.
1631 if (Flag == ~0U || (IFlags & Flag))
1632 return MatchOperand_NoMatch;
1637 Parser.Lex(); // Eat identifier token.
1638 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1639 return MatchOperand_Success;
1642 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1643 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1644 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1645 SMLoc S = Parser.getTok().getLoc();
1646 const AsmToken &Tok = Parser.getTok();
1647 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1648 StringRef Mask = Tok.getString();
1650 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1651 size_t Start = 0, Next = Mask.find('_');
1652 StringRef Flags = "";
1653 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1654 if (Next != StringRef::npos)
1655 Flags = Mask.slice(Next+1, Mask.size());
1657 // FlagsVal contains the complete mask:
1659 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1660 unsigned FlagsVal = 0;
1662 if (SpecReg == "apsr") {
1663 FlagsVal = StringSwitch<unsigned>(Flags)
1664 .Case("nzcvq", 0x8) // same as CPSR_f
1665 .Case("g", 0x4) // same as CPSR_s
1666 .Case("nzcvqg", 0xc) // same as CPSR_fs
1669 if (FlagsVal == ~0U) {
1671 return MatchOperand_NoMatch;
1673 FlagsVal = 0; // No flag
1675 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1676 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1678 for (int i = 0, e = Flags.size(); i != e; ++i) {
1679 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1686 // If some specific flag is already set, it means that some letter is
1687 // present more than once, this is not acceptable.
1688 if (FlagsVal == ~0U || (FlagsVal & Flag))
1689 return MatchOperand_NoMatch;
1692 } else // No match for special register.
1693 return MatchOperand_NoMatch;
1695 // Special register without flags are equivalent to "fc" flags.
1699 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1700 if (SpecReg == "spsr")
1703 Parser.Lex(); // Eat identifier token.
1704 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1705 return MatchOperand_Success;
1708 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1709 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1710 int Low, int High) {
1711 const AsmToken &Tok = Parser.getTok();
1712 if (Tok.isNot(AsmToken::Identifier)) {
1713 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1714 return MatchOperand_ParseFail;
1716 StringRef ShiftName = Tok.getString();
1717 std::string LowerOp = LowercaseString(Op);
1718 std::string UpperOp = UppercaseString(Op);
1719 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1720 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1721 return MatchOperand_ParseFail;
1723 Parser.Lex(); // Eat shift type token.
1725 // There must be a '#' and a shift amount.
1726 if (Parser.getTok().isNot(AsmToken::Hash)) {
1727 Error(Parser.getTok().getLoc(), "'#' expected");
1728 return MatchOperand_ParseFail;
1730 Parser.Lex(); // Eat hash token.
1732 const MCExpr *ShiftAmount;
1733 SMLoc Loc = Parser.getTok().getLoc();
1734 if (getParser().ParseExpression(ShiftAmount)) {
1735 Error(Loc, "illegal expression");
1736 return MatchOperand_ParseFail;
1738 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1740 Error(Loc, "constant expression expected");
1741 return MatchOperand_ParseFail;
1743 int Val = CE->getValue();
1744 if (Val < Low || Val > High) {
1745 Error(Loc, "immediate value out of range");
1746 return MatchOperand_ParseFail;
1749 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1751 return MatchOperand_Success;
1754 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1755 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1756 const AsmToken &Tok = Parser.getTok();
1757 SMLoc S = Tok.getLoc();
1758 if (Tok.isNot(AsmToken::Identifier)) {
1759 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1760 return MatchOperand_ParseFail;
1762 int Val = StringSwitch<int>(Tok.getString())
1766 Parser.Lex(); // Eat the token.
1769 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1770 return MatchOperand_ParseFail;
1772 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1774 S, Parser.getTok().getLoc()));
1775 return MatchOperand_Success;
1778 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1779 /// instructions. Legal values are:
1780 /// lsl #n 'n' in [0,31]
1781 /// asr #n 'n' in [1,32]
1782 /// n == 32 encoded as n == 0.
1783 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1784 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1785 const AsmToken &Tok = Parser.getTok();
1786 SMLoc S = Tok.getLoc();
1787 if (Tok.isNot(AsmToken::Identifier)) {
1788 Error(S, "shift operator 'asr' or 'lsl' expected");
1789 return MatchOperand_ParseFail;
1791 StringRef ShiftName = Tok.getString();
1793 if (ShiftName == "lsl" || ShiftName == "LSL")
1795 else if (ShiftName == "asr" || ShiftName == "ASR")
1798 Error(S, "shift operator 'asr' or 'lsl' expected");
1799 return MatchOperand_ParseFail;
1801 Parser.Lex(); // Eat the operator.
1803 // 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 E = Parser.getTok().getLoc();
1812 if (getParser().ParseExpression(ShiftAmount)) {
1813 Error(E, "malformed shift expression");
1814 return MatchOperand_ParseFail;
1816 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1818 Error(E, "shift amount must be an immediate");
1819 return MatchOperand_ParseFail;
1822 int64_t Val = CE->getValue();
1824 // Shift amount must be in [1,32]
1825 if (Val < 1 || Val > 32) {
1826 Error(E, "'asr' shift amount must be in range [1,32]");
1827 return MatchOperand_ParseFail;
1829 // asr #32 encoded as asr #0.
1830 if (Val == 32) Val = 0;
1832 // Shift amount must be in [1,32]
1833 if (Val < 0 || Val > 31) {
1834 Error(E, "'lsr' shift amount must be in range [0,31]");
1835 return MatchOperand_ParseFail;
1839 E = Parser.getTok().getLoc();
1840 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1842 return MatchOperand_Success;
1845 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1846 /// of instructions. Legal values are:
1847 /// ror #n 'n' in {0, 8, 16, 24}
1848 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1849 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1850 const AsmToken &Tok = Parser.getTok();
1851 SMLoc S = Tok.getLoc();
1852 if (Tok.isNot(AsmToken::Identifier)) {
1853 Error(S, "rotate operator 'ror' expected");
1854 return MatchOperand_ParseFail;
1856 StringRef ShiftName = Tok.getString();
1857 if (ShiftName != "ror" && ShiftName != "ROR") {
1858 Error(S, "rotate operator 'ror' expected");
1859 return MatchOperand_ParseFail;
1861 Parser.Lex(); // Eat the operator.
1863 // A '#' and a rotate amount.
1864 if (Parser.getTok().isNot(AsmToken::Hash)) {
1865 Error(Parser.getTok().getLoc(), "'#' expected");
1866 return MatchOperand_ParseFail;
1868 Parser.Lex(); // Eat hash token.
1870 const MCExpr *ShiftAmount;
1871 SMLoc E = Parser.getTok().getLoc();
1872 if (getParser().ParseExpression(ShiftAmount)) {
1873 Error(E, "malformed rotate expression");
1874 return MatchOperand_ParseFail;
1876 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1878 Error(E, "rotate amount must be an immediate");
1879 return MatchOperand_ParseFail;
1882 int64_t Val = CE->getValue();
1883 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1884 // normally, zero is represented in asm by omitting the rotate operand
1886 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1887 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1888 return MatchOperand_ParseFail;
1891 E = Parser.getTok().getLoc();
1892 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1894 return MatchOperand_Success;
1897 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1898 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1899 SMLoc S = Parser.getTok().getLoc();
1900 // The bitfield descriptor is really two operands, the LSB and the width.
1901 if (Parser.getTok().isNot(AsmToken::Hash)) {
1902 Error(Parser.getTok().getLoc(), "'#' expected");
1903 return MatchOperand_ParseFail;
1905 Parser.Lex(); // Eat hash token.
1907 const MCExpr *LSBExpr;
1908 SMLoc E = Parser.getTok().getLoc();
1909 if (getParser().ParseExpression(LSBExpr)) {
1910 Error(E, "malformed immediate expression");
1911 return MatchOperand_ParseFail;
1913 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
1915 Error(E, "'lsb' operand must be an immediate");
1916 return MatchOperand_ParseFail;
1919 int64_t LSB = CE->getValue();
1920 // The LSB must be in the range [0,31]
1921 if (LSB < 0 || LSB > 31) {
1922 Error(E, "'lsb' operand must be in the range [0,31]");
1923 return MatchOperand_ParseFail;
1925 E = Parser.getTok().getLoc();
1927 // Expect another immediate operand.
1928 if (Parser.getTok().isNot(AsmToken::Comma)) {
1929 Error(Parser.getTok().getLoc(), "too few operands");
1930 return MatchOperand_ParseFail;
1932 Parser.Lex(); // Eat hash token.
1933 if (Parser.getTok().isNot(AsmToken::Hash)) {
1934 Error(Parser.getTok().getLoc(), "'#' expected");
1935 return MatchOperand_ParseFail;
1937 Parser.Lex(); // Eat hash token.
1939 const MCExpr *WidthExpr;
1940 if (getParser().ParseExpression(WidthExpr)) {
1941 Error(E, "malformed immediate expression");
1942 return MatchOperand_ParseFail;
1944 CE = dyn_cast<MCConstantExpr>(WidthExpr);
1946 Error(E, "'width' operand must be an immediate");
1947 return MatchOperand_ParseFail;
1950 int64_t Width = CE->getValue();
1951 // The LSB must be in the range [1,32-lsb]
1952 if (Width < 1 || Width > 32 - LSB) {
1953 Error(E, "'width' operand must be in the range [1,32-lsb]");
1954 return MatchOperand_ParseFail;
1956 E = Parser.getTok().getLoc();
1958 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
1960 return MatchOperand_Success;
1963 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1964 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1965 // Check for a post-index addressing register operand. Specifically:
1966 // postidx_reg := '+' register {, shift}
1967 // | '-' register {, shift}
1968 // | register {, shift}
1970 // This method must return MatchOperand_NoMatch without consuming any tokens
1971 // in the case where there is no match, as other alternatives take other
1973 AsmToken Tok = Parser.getTok();
1974 SMLoc S = Tok.getLoc();
1975 bool haveEaten = false;
1978 if (Tok.is(AsmToken::Plus)) {
1979 Parser.Lex(); // Eat the '+' token.
1981 } else if (Tok.is(AsmToken::Minus)) {
1982 Parser.Lex(); // Eat the '-' token.
1986 if (Parser.getTok().is(AsmToken::Identifier))
1987 Reg = tryParseRegister();
1990 return MatchOperand_NoMatch;
1991 Error(Parser.getTok().getLoc(), "register expected");
1992 return MatchOperand_ParseFail;
1994 SMLoc E = Parser.getTok().getLoc();
1996 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
1997 unsigned ShiftImm = 0;
1998 if (Parser.getTok().is(AsmToken::Comma)) {
1999 Parser.Lex(); // Eat the ','.
2000 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2001 return MatchOperand_ParseFail;
2004 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2007 return MatchOperand_Success;
2010 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2011 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2012 /// when they refer multiple MIOperands inside a single one.
2014 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2015 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2016 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2018 // Create a writeback register dummy placeholder.
2019 Inst.addOperand(MCOperand::CreateImm(0));
2021 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2022 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2026 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2027 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2028 /// when they refer multiple MIOperands inside a single one.
2030 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2031 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2032 // Create a writeback register dummy placeholder.
2033 Inst.addOperand(MCOperand::CreateImm(0));
2034 assert(0 && "cvtStWriteBackRegAddrMode2 not implemented yet!");
2038 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2039 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2040 /// when they refer multiple MIOperands inside a single one.
2042 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2043 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2045 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2046 // Create a writeback register dummy placeholder.
2047 Inst.addOperand(MCOperand::CreateImm(0));
2049 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2051 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2053 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2057 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2058 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2059 /// when they refer multiple MIOperands inside a single one.
2061 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2062 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2064 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2065 // Create a writeback register dummy placeholder.
2066 Inst.addOperand(MCOperand::CreateImm(0));
2068 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2070 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2072 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2076 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2077 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2078 /// when they refer multiple MIOperands inside a single one.
2080 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2081 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2082 // Create a writeback register dummy placeholder.
2083 Inst.addOperand(MCOperand::CreateImm(0));
2085 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2087 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2089 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2091 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2095 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2096 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2097 /// when they refer multiple MIOperands inside a single one.
2099 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2100 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2101 // Create a writeback register dummy placeholder.
2102 Inst.addOperand(MCOperand::CreateImm(0));
2104 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2106 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2108 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2110 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2114 /// cvtLdrdPre - Convert parsed operands to MCInst.
2115 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2116 /// when they refer multiple MIOperands inside a single one.
2118 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2119 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2121 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2122 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2123 // Create a writeback register dummy placeholder.
2124 Inst.addOperand(MCOperand::CreateImm(0));
2126 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2128 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2132 /// Parse an ARM memory expression, return false if successful else return true
2133 /// or an error. The first token must be a '[' when called.
2135 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2137 assert(Parser.getTok().is(AsmToken::LBrac) &&
2138 "Token is not a Left Bracket");
2139 S = Parser.getTok().getLoc();
2140 Parser.Lex(); // Eat left bracket token.
2142 const AsmToken &BaseRegTok = Parser.getTok();
2143 int BaseRegNum = tryParseRegister();
2144 if (BaseRegNum == -1)
2145 return Error(BaseRegTok.getLoc(), "register expected");
2147 // The next token must either be a comma or a closing bracket.
2148 const AsmToken &Tok = Parser.getTok();
2149 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2150 return Error(Tok.getLoc(), "malformed memory operand");
2152 if (Tok.is(AsmToken::RBrac)) {
2154 Parser.Lex(); // Eat right bracket token.
2156 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2162 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2163 Parser.Lex(); // Eat the comma.
2165 // If we have a '#' it's an immediate offset, else assume it's a register
2167 if (Parser.getTok().is(AsmToken::Hash)) {
2168 Parser.Lex(); // Eat the '#'.
2169 E = Parser.getTok().getLoc();
2171 // FIXME: Special case #-0 so we can correctly set the U bit.
2173 const MCExpr *Offset;
2174 if (getParser().ParseExpression(Offset))
2177 // The expression has to be a constant. Memory references with relocations
2178 // don't come through here, as they use the <label> forms of the relevant
2180 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2182 return Error (E, "constant expression expected");
2184 // Now we should have the closing ']'
2185 E = Parser.getTok().getLoc();
2186 if (Parser.getTok().isNot(AsmToken::RBrac))
2187 return Error(E, "']' expected");
2188 Parser.Lex(); // Eat right bracket token.
2190 // Don't worry about range checking the value here. That's handled by
2191 // the is*() predicates.
2192 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2193 ARM_AM::no_shift, 0, false, S,E));
2195 // If there's a pre-indexing writeback marker, '!', just add it as a token
2197 if (Parser.getTok().is(AsmToken::Exclaim)) {
2198 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2199 Parser.Lex(); // Eat the '!'.
2205 // The register offset is optionally preceded by a '+' or '-'
2206 bool isNegative = false;
2207 if (Parser.getTok().is(AsmToken::Minus)) {
2209 Parser.Lex(); // Eat the '-'.
2210 } else if (Parser.getTok().is(AsmToken::Plus)) {
2212 Parser.Lex(); // Eat the '+'.
2215 E = Parser.getTok().getLoc();
2216 int OffsetRegNum = tryParseRegister();
2217 if (OffsetRegNum == -1)
2218 return Error(E, "register expected");
2220 // If there's a shift operator, handle it.
2221 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2222 unsigned ShiftImm = 0;
2223 if (Parser.getTok().is(AsmToken::Comma)) {
2224 Parser.Lex(); // Eat the ','.
2225 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2229 // Now we should have the closing ']'
2230 E = Parser.getTok().getLoc();
2231 if (Parser.getTok().isNot(AsmToken::RBrac))
2232 return Error(E, "']' expected");
2233 Parser.Lex(); // Eat right bracket token.
2235 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2236 ShiftType, ShiftImm, isNegative,
2239 // If there's a pre-indexing writeback marker, '!', just add it as a token
2241 if (Parser.getTok().is(AsmToken::Exclaim)) {
2242 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2243 Parser.Lex(); // Eat the '!'.
2249 /// parseMemRegOffsetShift - one of these two:
2250 /// ( lsl | lsr | asr | ror ) , # shift_amount
2252 /// return true if it parses a shift otherwise it returns false.
2253 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2255 SMLoc Loc = Parser.getTok().getLoc();
2256 const AsmToken &Tok = Parser.getTok();
2257 if (Tok.isNot(AsmToken::Identifier))
2259 StringRef ShiftName = Tok.getString();
2260 if (ShiftName == "lsl" || ShiftName == "LSL")
2262 else if (ShiftName == "lsr" || ShiftName == "LSR")
2264 else if (ShiftName == "asr" || ShiftName == "ASR")
2266 else if (ShiftName == "ror" || ShiftName == "ROR")
2268 else if (ShiftName == "rrx" || ShiftName == "RRX")
2271 return Error(Loc, "illegal shift operator");
2272 Parser.Lex(); // Eat shift type token.
2274 // rrx stands alone.
2276 if (St != ARM_AM::rrx) {
2277 Loc = Parser.getTok().getLoc();
2278 // A '#' and a shift amount.
2279 const AsmToken &HashTok = Parser.getTok();
2280 if (HashTok.isNot(AsmToken::Hash))
2281 return Error(HashTok.getLoc(), "'#' expected");
2282 Parser.Lex(); // Eat hash token.
2285 if (getParser().ParseExpression(Expr))
2287 // Range check the immediate.
2288 // lsl, ror: 0 <= imm <= 31
2289 // lsr, asr: 0 <= imm <= 32
2290 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2292 return Error(Loc, "shift amount must be an immediate");
2293 int64_t Imm = CE->getValue();
2295 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2296 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2297 return Error(Loc, "immediate shift value out of range");
2304 /// Parse a arm instruction operand. For now this parses the operand regardless
2305 /// of the mnemonic.
2306 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2307 StringRef Mnemonic) {
2310 // Check if the current operand has a custom associated parser, if so, try to
2311 // custom parse the operand, or fallback to the general approach.
2312 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2313 if (ResTy == MatchOperand_Success)
2315 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2316 // there was a match, but an error occurred, in which case, just return that
2317 // the operand parsing failed.
2318 if (ResTy == MatchOperand_ParseFail)
2321 switch (getLexer().getKind()) {
2323 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2325 case AsmToken::Identifier: {
2326 if (!tryParseRegisterWithWriteBack(Operands))
2328 int Res = tryParseShiftRegister(Operands);
2329 if (Res == 0) // success
2331 else if (Res == -1) // irrecoverable error
2334 // Fall though for the Identifier case that is not a register or a
2337 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2338 case AsmToken::Dot: { // . as a branch target
2339 // This was not a register so parse other operands that start with an
2340 // identifier (like labels) as expressions and create them as immediates.
2341 const MCExpr *IdVal;
2342 S = Parser.getTok().getLoc();
2343 if (getParser().ParseExpression(IdVal))
2345 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2346 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2349 case AsmToken::LBrac:
2350 return parseMemory(Operands);
2351 case AsmToken::LCurly:
2352 return parseRegisterList(Operands);
2353 case AsmToken::Hash:
2354 // #42 -> immediate.
2355 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2356 S = Parser.getTok().getLoc();
2358 const MCExpr *ImmVal;
2359 if (getParser().ParseExpression(ImmVal))
2361 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2362 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2364 case AsmToken::Colon: {
2365 // ":lower16:" and ":upper16:" expression prefixes
2366 // FIXME: Check it's an expression prefix,
2367 // e.g. (FOO - :lower16:BAR) isn't legal.
2368 ARMMCExpr::VariantKind RefKind;
2369 if (parsePrefix(RefKind))
2372 const MCExpr *SubExprVal;
2373 if (getParser().ParseExpression(SubExprVal))
2376 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2378 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2379 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2385 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2386 // :lower16: and :upper16:.
2387 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2388 RefKind = ARMMCExpr::VK_ARM_None;
2390 // :lower16: and :upper16: modifiers
2391 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2392 Parser.Lex(); // Eat ':'
2394 if (getLexer().isNot(AsmToken::Identifier)) {
2395 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2399 StringRef IDVal = Parser.getTok().getIdentifier();
2400 if (IDVal == "lower16") {
2401 RefKind = ARMMCExpr::VK_ARM_LO16;
2402 } else if (IDVal == "upper16") {
2403 RefKind = ARMMCExpr::VK_ARM_HI16;
2405 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2410 if (getLexer().isNot(AsmToken::Colon)) {
2411 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2414 Parser.Lex(); // Eat the last ':'
2419 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2420 MCSymbolRefExpr::VariantKind Variant) {
2421 // Recurse over the given expression, rebuilding it to apply the given variant
2422 // to the leftmost symbol.
2423 if (Variant == MCSymbolRefExpr::VK_None)
2426 switch (E->getKind()) {
2427 case MCExpr::Target:
2428 llvm_unreachable("Can't handle target expr yet");
2429 case MCExpr::Constant:
2430 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2432 case MCExpr::SymbolRef: {
2433 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2435 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2438 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2442 llvm_unreachable("Can't handle unary expressions yet");
2444 case MCExpr::Binary: {
2445 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2446 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2447 const MCExpr *RHS = BE->getRHS();
2451 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2455 assert(0 && "Invalid expression kind!");
2459 /// \brief Given a mnemonic, split out possible predication code and carry
2460 /// setting letters to form a canonical mnemonic and flags.
2462 // FIXME: Would be nice to autogen this.
2463 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2464 unsigned &PredicationCode,
2466 unsigned &ProcessorIMod) {
2467 PredicationCode = ARMCC::AL;
2468 CarrySetting = false;
2471 // Ignore some mnemonics we know aren't predicated forms.
2473 // FIXME: Would be nice to autogen this.
2474 if ((Mnemonic == "movs" && isThumb()) ||
2475 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2476 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2477 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2478 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2479 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2480 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2481 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2484 // First, split out any predication code. Ignore mnemonics we know aren't
2485 // predicated but do have a carry-set and so weren't caught above.
2486 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2487 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2488 Mnemonic != "umlals" && Mnemonic != "umulls") {
2489 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2490 .Case("eq", ARMCC::EQ)
2491 .Case("ne", ARMCC::NE)
2492 .Case("hs", ARMCC::HS)
2493 .Case("cs", ARMCC::HS)
2494 .Case("lo", ARMCC::LO)
2495 .Case("cc", ARMCC::LO)
2496 .Case("mi", ARMCC::MI)
2497 .Case("pl", ARMCC::PL)
2498 .Case("vs", ARMCC::VS)
2499 .Case("vc", ARMCC::VC)
2500 .Case("hi", ARMCC::HI)
2501 .Case("ls", ARMCC::LS)
2502 .Case("ge", ARMCC::GE)
2503 .Case("lt", ARMCC::LT)
2504 .Case("gt", ARMCC::GT)
2505 .Case("le", ARMCC::LE)
2506 .Case("al", ARMCC::AL)
2509 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2510 PredicationCode = CC;
2514 // Next, determine if we have a carry setting bit. We explicitly ignore all
2515 // the instructions we know end in 's'.
2516 if (Mnemonic.endswith("s") &&
2517 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
2518 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2519 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2520 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2521 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2522 (Mnemonic == "movs" && isThumb()))) {
2523 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2524 CarrySetting = true;
2527 // The "cps" instruction can have a interrupt mode operand which is glued into
2528 // the mnemonic. Check if this is the case, split it and parse the imod op
2529 if (Mnemonic.startswith("cps")) {
2530 // Split out any imod code.
2532 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2533 .Case("ie", ARM_PROC::IE)
2534 .Case("id", ARM_PROC::ID)
2537 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2538 ProcessorIMod = IMod;
2545 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2546 /// inclusion of carry set or predication code operands.
2548 // FIXME: It would be nice to autogen this.
2550 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2551 bool &CanAcceptPredicationCode) {
2552 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2553 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2554 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2555 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2556 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2557 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2558 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2559 Mnemonic == "eor" || Mnemonic == "smlal" ||
2560 (Mnemonic == "mov" && !isThumbOne())) {
2561 CanAcceptCarrySet = true;
2563 CanAcceptCarrySet = false;
2566 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2567 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2568 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2569 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2570 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2571 Mnemonic == "setend" ||
2572 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2573 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2575 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2576 CanAcceptPredicationCode = false;
2578 CanAcceptPredicationCode = true;
2582 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2583 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2584 CanAcceptPredicationCode = false;
2587 /// Parse an arm instruction mnemonic followed by its operands.
2588 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2589 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2590 // Create the leading tokens for the mnemonic, split by '.' characters.
2591 size_t Start = 0, Next = Name.find('.');
2592 StringRef Mnemonic = Name.slice(Start, Next);
2594 // Split out the predication code and carry setting flag from the mnemonic.
2595 unsigned PredicationCode;
2596 unsigned ProcessorIMod;
2598 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2601 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2603 // FIXME: This is all a pretty gross hack. We should automatically handle
2604 // optional operands like this via tblgen.
2606 // Next, add the CCOut and ConditionCode operands, if needed.
2608 // For mnemonics which can ever incorporate a carry setting bit or predication
2609 // code, our matching model involves us always generating CCOut and
2610 // ConditionCode operands to match the mnemonic "as written" and then we let
2611 // the matcher deal with finding the right instruction or generating an
2612 // appropriate error.
2613 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2614 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2616 // If we had a carry-set on an instruction that can't do that, issue an
2618 if (!CanAcceptCarrySet && CarrySetting) {
2619 Parser.EatToEndOfStatement();
2620 return Error(NameLoc, "instruction '" + Mnemonic +
2621 "' can not set flags, but 's' suffix specified");
2623 // If we had a predication code on an instruction that can't do that, issue an
2625 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2626 Parser.EatToEndOfStatement();
2627 return Error(NameLoc, "instruction '" + Mnemonic +
2628 "' is not predicable, but condition code specified");
2631 // Add the carry setting operand, if necessary.
2633 // FIXME: It would be awesome if we could somehow invent a location such that
2634 // match errors on this operand would print a nice diagnostic about how the
2635 // 's' character in the mnemonic resulted in a CCOut operand.
2636 if (CanAcceptCarrySet)
2637 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2640 // Add the predication code operand, if necessary.
2641 if (CanAcceptPredicationCode) {
2642 Operands.push_back(ARMOperand::CreateCondCode(
2643 ARMCC::CondCodes(PredicationCode), NameLoc));
2646 // Add the processor imod operand, if necessary.
2647 if (ProcessorIMod) {
2648 Operands.push_back(ARMOperand::CreateImm(
2649 MCConstantExpr::Create(ProcessorIMod, getContext()),
2652 // This mnemonic can't ever accept a imod, but the user wrote
2653 // one (or misspelled another mnemonic).
2655 // FIXME: Issue a nice error.
2658 // Add the remaining tokens in the mnemonic.
2659 while (Next != StringRef::npos) {
2661 Next = Name.find('.', Start + 1);
2662 StringRef ExtraToken = Name.slice(Start, Next);
2664 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2667 // Read the remaining operands.
2668 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2669 // Read the first operand.
2670 if (parseOperand(Operands, Mnemonic)) {
2671 Parser.EatToEndOfStatement();
2675 while (getLexer().is(AsmToken::Comma)) {
2676 Parser.Lex(); // Eat the comma.
2678 // Parse and remember the operand.
2679 if (parseOperand(Operands, Mnemonic)) {
2680 Parser.EatToEndOfStatement();
2686 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2687 Parser.EatToEndOfStatement();
2688 return TokError("unexpected token in argument list");
2691 Parser.Lex(); // Consume the EndOfStatement
2694 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2695 // another does not. Specifically, the MOVW instruction does not. So we
2696 // special case it here and remove the defaulted (non-setting) cc_out
2697 // operand if that's the instruction we're trying to match.
2699 // We do this post-processing of the explicit operands rather than just
2700 // conditionally adding the cc_out in the first place because we need
2701 // to check the type of the parsed immediate operand.
2702 if (Mnemonic == "mov" && Operands.size() > 4 &&
2703 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2704 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2705 static_cast<ARMOperand*>(Operands[1])->getReg() == 0) {
2706 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2707 Operands.erase(Operands.begin() + 1);
2711 // ARM mode 'blx' need special handling, as the register operand version
2712 // is predicable, but the label operand version is not. So, we can't rely
2713 // on the Mnemonic based checking to correctly figure out when to put
2714 // a CondCode operand in the list. If we're trying to match the label
2715 // version, remove the CondCode operand here.
2716 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2717 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2718 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2719 Operands.erase(Operands.begin() + 1);
2725 // Validate context-sensitive operand constraints.
2726 // FIXME: We would really like to be able to tablegen'erate this.
2728 validateInstruction(MCInst &Inst,
2729 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2730 switch (Inst.getOpcode()) {
2733 case ARM::LDRD_POST:
2735 // Rt2 must be Rt + 1.
2736 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2737 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2739 return Error(Operands[3]->getStartLoc(),
2740 "destination operands must be sequential");
2744 case ARM::STRgD_PRE:
2745 case ARM::STRgD_POST:
2747 // Rt2 must be Rt + 1.
2748 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2749 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
2751 return Error(Operands[4]->getStartLoc(),
2752 "source operands must be sequential");
2757 // width must be in range [1, 32-lsb]
2758 unsigned lsb = Inst.getOperand(2).getImm();
2759 unsigned widthm1 = Inst.getOperand(3).getImm();
2760 if (widthm1 >= 32 - lsb)
2761 return Error(Operands[5]->getStartLoc(),
2762 "bitfield width must be in range [1,32-lsb]");
2770 MatchAndEmitInstruction(SMLoc IDLoc,
2771 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2775 MatchResultTy MatchResult;
2776 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2777 switch (MatchResult) {
2779 // Context sensitive operand constraints aren't handled by the matcher,
2780 // so check them here.
2781 if (validateInstruction(Inst, Operands))
2784 Out.EmitInstruction(Inst);
2786 case Match_MissingFeature:
2787 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2789 case Match_InvalidOperand: {
2790 SMLoc ErrorLoc = IDLoc;
2791 if (ErrorInfo != ~0U) {
2792 if (ErrorInfo >= Operands.size())
2793 return Error(IDLoc, "too few operands for instruction");
2795 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2796 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2799 return Error(ErrorLoc, "invalid operand for instruction");
2801 case Match_MnemonicFail:
2802 return Error(IDLoc, "unrecognized instruction mnemonic");
2803 case Match_ConversionFail:
2804 return Error(IDLoc, "unable to convert operands to instruction");
2807 llvm_unreachable("Implement any new match types added!");
2811 /// parseDirective parses the arm specific directives
2812 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2813 StringRef IDVal = DirectiveID.getIdentifier();
2814 if (IDVal == ".word")
2815 return parseDirectiveWord(4, DirectiveID.getLoc());
2816 else if (IDVal == ".thumb")
2817 return parseDirectiveThumb(DirectiveID.getLoc());
2818 else if (IDVal == ".thumb_func")
2819 return parseDirectiveThumbFunc(DirectiveID.getLoc());
2820 else if (IDVal == ".code")
2821 return parseDirectiveCode(DirectiveID.getLoc());
2822 else if (IDVal == ".syntax")
2823 return parseDirectiveSyntax(DirectiveID.getLoc());
2827 /// parseDirectiveWord
2828 /// ::= .word [ expression (, expression)* ]
2829 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
2830 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2832 const MCExpr *Value;
2833 if (getParser().ParseExpression(Value))
2836 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2838 if (getLexer().is(AsmToken::EndOfStatement))
2841 // FIXME: Improve diagnostic.
2842 if (getLexer().isNot(AsmToken::Comma))
2843 return Error(L, "unexpected token in directive");
2852 /// parseDirectiveThumb
2854 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
2855 if (getLexer().isNot(AsmToken::EndOfStatement))
2856 return Error(L, "unexpected token in directive");
2859 // TODO: set thumb mode
2860 // TODO: tell the MC streamer the mode
2861 // getParser().getStreamer().Emit???();
2865 /// parseDirectiveThumbFunc
2866 /// ::= .thumbfunc symbol_name
2867 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
2868 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
2869 bool isMachO = MAI.hasSubsectionsViaSymbols();
2872 // Darwin asm has function name after .thumb_func direction
2875 const AsmToken &Tok = Parser.getTok();
2876 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
2877 return Error(L, "unexpected token in .thumb_func directive");
2878 Name = Tok.getString();
2879 Parser.Lex(); // Consume the identifier token.
2882 if (getLexer().isNot(AsmToken::EndOfStatement))
2883 return Error(L, "unexpected token in directive");
2886 // FIXME: assuming function name will be the line following .thumb_func
2888 Name = Parser.getTok().getString();
2891 // Mark symbol as a thumb symbol.
2892 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
2893 getParser().getStreamer().EmitThumbFunc(Func);
2897 /// parseDirectiveSyntax
2898 /// ::= .syntax unified | divided
2899 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
2900 const AsmToken &Tok = Parser.getTok();
2901 if (Tok.isNot(AsmToken::Identifier))
2902 return Error(L, "unexpected token in .syntax directive");
2903 StringRef Mode = Tok.getString();
2904 if (Mode == "unified" || Mode == "UNIFIED")
2906 else if (Mode == "divided" || Mode == "DIVIDED")
2907 return Error(L, "'.syntax divided' arm asssembly not supported");
2909 return Error(L, "unrecognized syntax mode in .syntax directive");
2911 if (getLexer().isNot(AsmToken::EndOfStatement))
2912 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2915 // TODO tell the MC streamer the mode
2916 // getParser().getStreamer().Emit???();
2920 /// parseDirectiveCode
2921 /// ::= .code 16 | 32
2922 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
2923 const AsmToken &Tok = Parser.getTok();
2924 if (Tok.isNot(AsmToken::Integer))
2925 return Error(L, "unexpected token in .code directive");
2926 int64_t Val = Parser.getTok().getIntVal();
2932 return Error(L, "invalid operand to .code directive");
2934 if (getLexer().isNot(AsmToken::EndOfStatement))
2935 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
2941 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
2946 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
2953 extern "C" void LLVMInitializeARMAsmLexer();
2955 /// Force static initialization.
2956 extern "C" void LLVMInitializeARMAsmParser() {
2957 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
2958 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
2959 LLVMInitializeARMAsmLexer();
2962 #define GET_REGISTER_MATCHER
2963 #define GET_MATCHER_IMPLEMENTATION
2964 #include "ARMGenAsmMatcher.inc"