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*>&);
117 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
119 // Asm Match Converter Methods
120 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
121 const SmallVectorImpl<MCParsedAsmOperand*> &);
122 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
123 const SmallVectorImpl<MCParsedAsmOperand*> &);
124 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
125 const SmallVectorImpl<MCParsedAsmOperand*> &);
126 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
127 const SmallVectorImpl<MCParsedAsmOperand*> &);
128 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
129 const SmallVectorImpl<MCParsedAsmOperand*> &);
130 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
131 const SmallVectorImpl<MCParsedAsmOperand*> &);
132 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
133 const SmallVectorImpl<MCParsedAsmOperand*> &);
134 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
135 const SmallVectorImpl<MCParsedAsmOperand*> &);
137 bool validateInstruction(MCInst &Inst,
138 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
141 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
142 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
143 MCAsmParserExtension::Initialize(_Parser);
145 // Initialize the set of available features.
146 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
149 // Implementation of the MCTargetAsmParser interface:
150 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
151 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
152 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
153 bool ParseDirective(AsmToken DirectiveID);
155 bool MatchAndEmitInstruction(SMLoc IDLoc,
156 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
159 } // end anonymous namespace
163 /// ARMOperand - Instances of this class represent a parsed ARM machine
165 class ARMOperand : public MCParsedAsmOperand {
189 SMLoc StartLoc, EndLoc;
190 SmallVector<unsigned, 8> Registers;
194 ARMCC::CondCodes Val;
206 ARM_PROC::IFlags Val;
226 /// Combined record for all forms of ARM address expressions.
229 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
231 const MCConstantExpr *OffsetImm; // Offset immediate value
232 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
233 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
234 unsigned ShiftImm; // shift for OffsetReg.
235 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
241 ARM_AM::ShiftOpc ShiftTy;
250 ARM_AM::ShiftOpc ShiftTy;
256 ARM_AM::ShiftOpc ShiftTy;
269 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
271 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
273 StartLoc = o.StartLoc;
287 case DPRRegisterList:
288 case SPRRegisterList:
289 Registers = o.Registers;
304 case PostIndexRegister:
305 PostIdxReg = o.PostIdxReg;
313 case ShifterImmediate:
314 ShifterImm = o.ShifterImm;
316 case ShiftedRegister:
317 RegShiftedReg = o.RegShiftedReg;
319 case ShiftedImmediate:
320 RegShiftedImm = o.RegShiftedImm;
322 case RotateImmediate:
325 case BitfieldDescriptor:
326 Bitfield = o.Bitfield;
331 /// getStartLoc - Get the location of the first token of this operand.
332 SMLoc getStartLoc() const { return StartLoc; }
333 /// getEndLoc - Get the location of the last token of this operand.
334 SMLoc getEndLoc() const { return EndLoc; }
336 ARMCC::CondCodes getCondCode() const {
337 assert(Kind == CondCode && "Invalid access!");
341 unsigned getCoproc() const {
342 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
346 StringRef getToken() const {
347 assert(Kind == Token && "Invalid access!");
348 return StringRef(Tok.Data, Tok.Length);
351 unsigned getReg() const {
352 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
356 const SmallVectorImpl<unsigned> &getRegList() const {
357 assert((Kind == RegisterList || Kind == DPRRegisterList ||
358 Kind == SPRRegisterList) && "Invalid access!");
362 const MCExpr *getImm() const {
363 assert(Kind == Immediate && "Invalid access!");
367 ARM_MB::MemBOpt getMemBarrierOpt() const {
368 assert(Kind == MemBarrierOpt && "Invalid access!");
372 ARM_PROC::IFlags getProcIFlags() const {
373 assert(Kind == ProcIFlags && "Invalid access!");
377 unsigned getMSRMask() const {
378 assert(Kind == MSRMask && "Invalid access!");
382 bool isCoprocNum() const { return Kind == CoprocNum; }
383 bool isCoprocReg() const { return Kind == CoprocReg; }
384 bool isCondCode() const { return Kind == CondCode; }
385 bool isCCOut() const { return Kind == CCOut; }
386 bool isImm() const { return Kind == Immediate; }
387 bool isImm0_255() const {
388 if (Kind != Immediate)
390 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
391 if (!CE) return false;
392 int64_t Value = CE->getValue();
393 return Value >= 0 && Value < 256;
395 bool isImm0_7() const {
396 if (Kind != Immediate)
398 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
399 if (!CE) return false;
400 int64_t Value = CE->getValue();
401 return Value >= 0 && Value < 8;
403 bool isImm0_15() const {
404 if (Kind != Immediate)
406 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
407 if (!CE) return false;
408 int64_t Value = CE->getValue();
409 return Value >= 0 && Value < 16;
411 bool isImm0_31() 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 < 32;
419 bool isImm1_16() 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 < 17;
427 bool isImm1_32() 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 < 33;
435 bool isImm0_65535() 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 < 65536;
443 bool isImm0_65535Expr() const {
444 if (Kind != Immediate)
446 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
447 // If it's not a constant expression, it'll generate a fixup and be
449 if (!CE) return true;
450 int64_t Value = CE->getValue();
451 return Value >= 0 && Value < 65536;
453 bool isImm24bit() const {
454 if (Kind != Immediate)
456 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
457 if (!CE) return false;
458 int64_t Value = CE->getValue();
459 return Value >= 0 && Value <= 0xffffff;
461 bool isPKHLSLImm() const {
462 if (Kind != Immediate)
464 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
465 if (!CE) return false;
466 int64_t Value = CE->getValue();
467 return Value >= 0 && Value < 32;
469 bool isPKHASRImm() const {
470 if (Kind != Immediate)
472 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
473 if (!CE) return false;
474 int64_t Value = CE->getValue();
475 return Value > 0 && Value <= 32;
477 bool isARMSOImm() 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 ARM_AM::getSOImmVal(Value) != -1;
485 bool isT2SOImm() 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 ARM_AM::getT2SOImmVal(Value) != -1;
493 bool isSetEndImm() 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 == 1 || Value == 0;
501 bool isReg() const { return Kind == Register; }
502 bool isRegList() const { return Kind == RegisterList; }
503 bool isDPRRegList() const { return Kind == DPRRegisterList; }
504 bool isSPRRegList() const { return Kind == SPRRegisterList; }
505 bool isToken() const { return Kind == Token; }
506 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
507 bool isMemory() const { return Kind == Memory; }
508 bool isShifterImm() const { return Kind == ShifterImmediate; }
509 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
510 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
511 bool isRotImm() const { return Kind == RotateImmediate; }
512 bool isBitfield() const { return Kind == BitfieldDescriptor; }
513 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
514 bool isPostIdxReg() const {
515 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
517 bool isMemNoOffset() const {
520 // No offset of any kind.
521 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
523 bool isAddrMode2() const {
526 // Check for register offset.
527 if (Mem.OffsetRegNum) return true;
528 // Immediate offset in range [-4095, 4095].
529 if (!Mem.OffsetImm) return true;
530 int64_t Val = Mem.OffsetImm->getValue();
531 return Val > -4096 && Val < 4096;
533 bool isAM2OffsetImm() const {
534 if (Kind != Immediate)
536 // Immediate offset in range [-4095, 4095].
537 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
538 if (!CE) return false;
539 int64_t Val = CE->getValue();
540 return Val > -4096 && Val < 4096;
542 bool isAddrMode3() const {
545 // No shifts are legal for AM3.
546 if (Mem.ShiftType != ARM_AM::no_shift) return false;
547 // Check for register offset.
548 if (Mem.OffsetRegNum) return true;
549 // Immediate offset in range [-255, 255].
550 if (!Mem.OffsetImm) return true;
551 int64_t Val = Mem.OffsetImm->getValue();
552 return Val > -256 && Val < 256;
554 bool isAM3Offset() const {
555 if (Kind != Immediate && Kind != PostIndexRegister)
557 if (Kind == PostIndexRegister)
558 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
559 // Immediate offset in range [-255, 255].
560 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
561 if (!CE) return false;
562 int64_t Val = CE->getValue();
563 // Special case, #-0 is INT32_MIN.
564 return (Val > -256 && Val < 256) || Val == INT32_MIN;
566 bool isAddrMode5() const {
569 // Check for register offset.
570 if (Mem.OffsetRegNum) return false;
571 // Immediate offset in range [-1020, 1020] and a multiple of 4.
572 if (!Mem.OffsetImm) return true;
573 int64_t Val = Mem.OffsetImm->getValue();
574 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
576 bool isMemRegOffset() const {
577 if (Kind != Memory || !Mem.OffsetRegNum)
581 bool isMemThumbRR() const {
582 // Thumb reg+reg addressing is simple. Just two registers, a base and
583 // an offset. No shifts, negations or any other complicating factors.
584 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
585 Mem.ShiftType != ARM_AM::no_shift)
589 bool isMemImm8Offset() const {
590 if (Kind != Memory || Mem.OffsetRegNum != 0)
592 // Immediate offset in range [-255, 255].
593 if (!Mem.OffsetImm) return true;
594 int64_t Val = Mem.OffsetImm->getValue();
595 return Val > -256 && Val < 256;
597 bool isMemImm12Offset() const {
598 // If we have an immediate that's not a constant, treat it as a label
599 // reference needing a fixup. If it is a constant, it's something else
601 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
604 if (Kind != Memory || Mem.OffsetRegNum != 0)
606 // Immediate offset in range [-4095, 4095].
607 if (!Mem.OffsetImm) return true;
608 int64_t Val = Mem.OffsetImm->getValue();
609 return Val > -4096 && Val < 4096;
611 bool isPostIdxImm8() const {
612 if (Kind != Immediate)
614 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
615 if (!CE) return false;
616 int64_t Val = CE->getValue();
617 return Val > -256 && Val < 256;
620 bool isMSRMask() const { return Kind == MSRMask; }
621 bool isProcIFlags() const { return Kind == ProcIFlags; }
623 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
624 // Add as immediates when possible. Null MCExpr = 0.
626 Inst.addOperand(MCOperand::CreateImm(0));
627 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
628 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
630 Inst.addOperand(MCOperand::CreateExpr(Expr));
633 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
634 assert(N == 2 && "Invalid number of operands!");
635 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
636 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
637 Inst.addOperand(MCOperand::CreateReg(RegNum));
640 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
641 assert(N == 1 && "Invalid number of operands!");
642 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
645 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
646 assert(N == 1 && "Invalid number of operands!");
647 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
650 void addCCOutOperands(MCInst &Inst, unsigned N) const {
651 assert(N == 1 && "Invalid number of operands!");
652 Inst.addOperand(MCOperand::CreateReg(getReg()));
655 void addRegOperands(MCInst &Inst, unsigned N) const {
656 assert(N == 1 && "Invalid number of operands!");
657 Inst.addOperand(MCOperand::CreateReg(getReg()));
660 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
661 assert(N == 3 && "Invalid number of operands!");
662 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
663 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
664 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
665 Inst.addOperand(MCOperand::CreateImm(
666 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
669 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
670 assert(N == 2 && "Invalid number of operands!");
671 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
672 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
673 Inst.addOperand(MCOperand::CreateImm(
674 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
678 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
679 assert(N == 1 && "Invalid number of operands!");
680 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
684 void addRegListOperands(MCInst &Inst, unsigned N) const {
685 assert(N == 1 && "Invalid number of operands!");
686 const SmallVectorImpl<unsigned> &RegList = getRegList();
687 for (SmallVectorImpl<unsigned>::const_iterator
688 I = RegList.begin(), E = RegList.end(); I != E; ++I)
689 Inst.addOperand(MCOperand::CreateReg(*I));
692 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
693 addRegListOperands(Inst, N);
696 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
697 addRegListOperands(Inst, N);
700 void addRotImmOperands(MCInst &Inst, unsigned N) const {
701 assert(N == 1 && "Invalid number of operands!");
702 // Encoded as val>>3. The printer handles display as 8, 16, 24.
703 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
706 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
707 assert(N == 1 && "Invalid number of operands!");
708 // Munge the lsb/width into a bitfield mask.
709 unsigned lsb = Bitfield.LSB;
710 unsigned width = Bitfield.Width;
711 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
712 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
713 (32 - (lsb + width)));
714 Inst.addOperand(MCOperand::CreateImm(Mask));
717 void addImmOperands(MCInst &Inst, unsigned N) const {
718 assert(N == 1 && "Invalid number of operands!");
719 addExpr(Inst, getImm());
722 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
723 assert(N == 1 && "Invalid number of operands!");
724 addExpr(Inst, getImm());
727 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
728 assert(N == 1 && "Invalid number of operands!");
729 addExpr(Inst, getImm());
732 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
733 assert(N == 1 && "Invalid number of operands!");
734 addExpr(Inst, getImm());
737 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
738 assert(N == 1 && "Invalid number of operands!");
739 addExpr(Inst, getImm());
742 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
743 assert(N == 1 && "Invalid number of operands!");
744 // The constant encodes as the immediate-1, and we store in the instruction
745 // the bits as encoded, so subtract off one here.
746 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
747 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
750 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
751 assert(N == 1 && "Invalid number of operands!");
752 // The constant encodes as the immediate-1, and we store in the instruction
753 // the bits as encoded, so subtract off one here.
754 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
755 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
758 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
759 assert(N == 1 && "Invalid number of operands!");
760 addExpr(Inst, getImm());
763 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
764 assert(N == 1 && "Invalid number of operands!");
765 addExpr(Inst, getImm());
768 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
769 assert(N == 1 && "Invalid number of operands!");
770 addExpr(Inst, getImm());
773 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
774 assert(N == 1 && "Invalid number of operands!");
775 addExpr(Inst, getImm());
778 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
779 assert(N == 1 && "Invalid number of operands!");
780 // An ASR value of 32 encodes as 0, so that's how we want to add it to
781 // the instruction as well.
782 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
783 int Val = CE->getValue();
784 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
787 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
788 assert(N == 1 && "Invalid number of operands!");
789 addExpr(Inst, getImm());
792 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
793 assert(N == 1 && "Invalid number of operands!");
794 addExpr(Inst, getImm());
797 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
798 assert(N == 1 && "Invalid number of operands!");
799 addExpr(Inst, getImm());
802 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
803 assert(N == 1 && "Invalid number of operands!");
804 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
807 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
808 assert(N == 1 && "Invalid number of operands!");
809 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
812 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
813 assert(N == 3 && "Invalid number of operands!");
814 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
815 if (!Mem.OffsetRegNum) {
816 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
817 // Special case for #-0
818 if (Val == INT32_MIN) Val = 0;
819 if (Val < 0) Val = -Val;
820 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
822 // For register offset, we encode the shift type and negation flag
824 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
827 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
828 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
829 Inst.addOperand(MCOperand::CreateImm(Val));
832 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
833 assert(N == 2 && "Invalid number of operands!");
834 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
835 assert(CE && "non-constant AM2OffsetImm operand!");
836 int32_t Val = CE->getValue();
837 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
838 // Special case for #-0
839 if (Val == INT32_MIN) Val = 0;
840 if (Val < 0) Val = -Val;
841 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
842 Inst.addOperand(MCOperand::CreateReg(0));
843 Inst.addOperand(MCOperand::CreateImm(Val));
846 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
847 assert(N == 3 && "Invalid number of operands!");
848 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
849 if (!Mem.OffsetRegNum) {
850 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
851 // Special case for #-0
852 if (Val == INT32_MIN) Val = 0;
853 if (Val < 0) Val = -Val;
854 Val = ARM_AM::getAM3Opc(AddSub, Val);
856 // For register offset, we encode the shift type and negation flag
858 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
860 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
861 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
862 Inst.addOperand(MCOperand::CreateImm(Val));
865 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
866 assert(N == 2 && "Invalid number of operands!");
867 if (Kind == PostIndexRegister) {
869 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
870 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
871 Inst.addOperand(MCOperand::CreateImm(Val));
876 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
877 int32_t Val = CE->getValue();
878 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
879 // Special case for #-0
880 if (Val == INT32_MIN) Val = 0;
881 if (Val < 0) Val = -Val;
882 Val = ARM_AM::getAM3Opc(AddSub, Val);
883 Inst.addOperand(MCOperand::CreateReg(0));
884 Inst.addOperand(MCOperand::CreateImm(Val));
887 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
888 assert(N == 2 && "Invalid number of operands!");
889 // The lower two bits are always zero and as such are not encoded.
890 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
891 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
892 // Special case for #-0
893 if (Val == INT32_MIN) Val = 0;
894 if (Val < 0) Val = -Val;
895 Val = ARM_AM::getAM5Opc(AddSub, Val);
896 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
897 Inst.addOperand(MCOperand::CreateImm(Val));
900 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
901 assert(N == 2 && "Invalid number of operands!");
902 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
903 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
904 Inst.addOperand(MCOperand::CreateImm(Val));
907 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
908 assert(N == 2 && "Invalid number of operands!");
909 // If this is an immediate, it's a label reference.
910 if (Kind == Immediate) {
911 addExpr(Inst, getImm());
912 Inst.addOperand(MCOperand::CreateImm(0));
916 // Otherwise, it's a normal memory reg+offset.
917 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
918 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
919 Inst.addOperand(MCOperand::CreateImm(Val));
922 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
923 assert(N == 3 && "Invalid number of operands!");
924 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
925 Mem.ShiftImm, Mem.ShiftType);
926 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
927 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
928 Inst.addOperand(MCOperand::CreateImm(Val));
931 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
932 assert(N == 2 && "Invalid number of operands!");
933 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
934 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
937 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
938 assert(N == 1 && "Invalid number of operands!");
939 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
940 assert(CE && "non-constant post-idx-imm8 operand!");
941 int Imm = CE->getValue();
942 bool isAdd = Imm >= 0;
943 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
944 Inst.addOperand(MCOperand::CreateImm(Imm));
947 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
948 assert(N == 2 && "Invalid number of operands!");
949 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
950 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
953 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
954 assert(N == 2 && "Invalid number of operands!");
955 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
956 // The sign, shift type, and shift amount are encoded in a single operand
957 // using the AM2 encoding helpers.
958 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
959 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
961 Inst.addOperand(MCOperand::CreateImm(Imm));
964 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
965 assert(N == 1 && "Invalid number of operands!");
966 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
969 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
970 assert(N == 1 && "Invalid number of operands!");
971 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
974 virtual void print(raw_ostream &OS) const;
976 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
977 ARMOperand *Op = new ARMOperand(CondCode);
984 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
985 ARMOperand *Op = new ARMOperand(CoprocNum);
986 Op->Cop.Val = CopVal;
992 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
993 ARMOperand *Op = new ARMOperand(CoprocReg);
994 Op->Cop.Val = CopVal;
1000 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1001 ARMOperand *Op = new ARMOperand(CCOut);
1002 Op->Reg.RegNum = RegNum;
1008 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1009 ARMOperand *Op = new ARMOperand(Token);
1010 Op->Tok.Data = Str.data();
1011 Op->Tok.Length = Str.size();
1017 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1018 ARMOperand *Op = new ARMOperand(Register);
1019 Op->Reg.RegNum = RegNum;
1025 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1030 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1031 Op->RegShiftedReg.ShiftTy = ShTy;
1032 Op->RegShiftedReg.SrcReg = SrcReg;
1033 Op->RegShiftedReg.ShiftReg = ShiftReg;
1034 Op->RegShiftedReg.ShiftImm = ShiftImm;
1040 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1044 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1045 Op->RegShiftedImm.ShiftTy = ShTy;
1046 Op->RegShiftedImm.SrcReg = SrcReg;
1047 Op->RegShiftedImm.ShiftImm = ShiftImm;
1053 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1055 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1056 Op->ShifterImm.isASR = isASR;
1057 Op->ShifterImm.Imm = Imm;
1063 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1064 ARMOperand *Op = new ARMOperand(RotateImmediate);
1065 Op->RotImm.Imm = Imm;
1071 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1073 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1074 Op->Bitfield.LSB = LSB;
1075 Op->Bitfield.Width = Width;
1082 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1083 SMLoc StartLoc, SMLoc EndLoc) {
1084 KindTy Kind = RegisterList;
1086 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1087 contains(Regs.front().first))
1088 Kind = DPRRegisterList;
1089 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1090 contains(Regs.front().first))
1091 Kind = SPRRegisterList;
1093 ARMOperand *Op = new ARMOperand(Kind);
1094 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1095 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1096 Op->Registers.push_back(I->first);
1097 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1098 Op->StartLoc = StartLoc;
1099 Op->EndLoc = EndLoc;
1103 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1104 ARMOperand *Op = new ARMOperand(Immediate);
1111 static ARMOperand *CreateMem(unsigned BaseRegNum,
1112 const MCConstantExpr *OffsetImm,
1113 unsigned OffsetRegNum,
1114 ARM_AM::ShiftOpc ShiftType,
1118 ARMOperand *Op = new ARMOperand(Memory);
1119 Op->Mem.BaseRegNum = BaseRegNum;
1120 Op->Mem.OffsetImm = OffsetImm;
1121 Op->Mem.OffsetRegNum = OffsetRegNum;
1122 Op->Mem.ShiftType = ShiftType;
1123 Op->Mem.ShiftImm = ShiftImm;
1124 Op->Mem.isNegative = isNegative;
1130 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1131 ARM_AM::ShiftOpc ShiftTy,
1134 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1135 Op->PostIdxReg.RegNum = RegNum;
1136 Op->PostIdxReg.isAdd = isAdd;
1137 Op->PostIdxReg.ShiftTy = ShiftTy;
1138 Op->PostIdxReg.ShiftImm = ShiftImm;
1144 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1145 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1146 Op->MBOpt.Val = Opt;
1152 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1153 ARMOperand *Op = new ARMOperand(ProcIFlags);
1154 Op->IFlags.Val = IFlags;
1160 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1161 ARMOperand *Op = new ARMOperand(MSRMask);
1162 Op->MMask.Val = MMask;
1169 } // end anonymous namespace.
1171 void ARMOperand::print(raw_ostream &OS) const {
1174 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1177 OS << "<ccout " << getReg() << ">";
1180 OS << "<coprocessor number: " << getCoproc() << ">";
1183 OS << "<coprocessor register: " << getCoproc() << ">";
1186 OS << "<mask: " << getMSRMask() << ">";
1189 getImm()->print(OS);
1192 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1196 << " base:" << Mem.BaseRegNum;
1199 case PostIndexRegister:
1200 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1201 << PostIdxReg.RegNum;
1202 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1203 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1204 << PostIdxReg.ShiftImm;
1208 OS << "<ARM_PROC::";
1209 unsigned IFlags = getProcIFlags();
1210 for (int i=2; i >= 0; --i)
1211 if (IFlags & (1 << i))
1212 OS << ARM_PROC::IFlagsToString(1 << i);
1217 OS << "<register " << getReg() << ">";
1219 case ShifterImmediate:
1220 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1221 << " #" << ShifterImm.Imm << ">";
1223 case ShiftedRegister:
1224 OS << "<so_reg_reg "
1225 << RegShiftedReg.SrcReg
1226 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1227 << ", " << RegShiftedReg.ShiftReg << ", "
1228 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1231 case ShiftedImmediate:
1232 OS << "<so_reg_imm "
1233 << RegShiftedImm.SrcReg
1234 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1235 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1238 case RotateImmediate:
1239 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1241 case BitfieldDescriptor:
1242 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1243 << ", width: " << Bitfield.Width << ">";
1246 case DPRRegisterList:
1247 case SPRRegisterList: {
1248 OS << "<register_list ";
1250 const SmallVectorImpl<unsigned> &RegList = getRegList();
1251 for (SmallVectorImpl<unsigned>::const_iterator
1252 I = RegList.begin(), E = RegList.end(); I != E; ) {
1254 if (++I < E) OS << ", ";
1261 OS << "'" << getToken() << "'";
1266 /// @name Auto-generated Match Functions
1269 static unsigned MatchRegisterName(StringRef Name);
1273 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1274 SMLoc &StartLoc, SMLoc &EndLoc) {
1275 RegNo = tryParseRegister();
1277 return (RegNo == (unsigned)-1);
1280 /// Try to parse a register name. The token must be an Identifier when called,
1281 /// and if it is a register name the token is eaten and the register number is
1282 /// returned. Otherwise return -1.
1284 int ARMAsmParser::tryParseRegister() {
1285 const AsmToken &Tok = Parser.getTok();
1286 if (Tok.isNot(AsmToken::Identifier)) return -1;
1288 // FIXME: Validate register for the current architecture; we have to do
1289 // validation later, so maybe there is no need for this here.
1290 std::string upperCase = Tok.getString().str();
1291 std::string lowerCase = LowercaseString(upperCase);
1292 unsigned RegNum = MatchRegisterName(lowerCase);
1294 RegNum = StringSwitch<unsigned>(lowerCase)
1295 .Case("r13", ARM::SP)
1296 .Case("r14", ARM::LR)
1297 .Case("r15", ARM::PC)
1298 .Case("ip", ARM::R12)
1301 if (!RegNum) return -1;
1303 Parser.Lex(); // Eat identifier token.
1307 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1308 // If a recoverable error occurs, return 1. If an irrecoverable error
1309 // occurs, return -1. An irrecoverable error is one where tokens have been
1310 // consumed in the process of trying to parse the shifter (i.e., when it is
1311 // indeed a shifter operand, but malformed).
1312 int ARMAsmParser::tryParseShiftRegister(
1313 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1314 SMLoc S = Parser.getTok().getLoc();
1315 const AsmToken &Tok = Parser.getTok();
1316 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1318 std::string upperCase = Tok.getString().str();
1319 std::string lowerCase = LowercaseString(upperCase);
1320 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1321 .Case("lsl", ARM_AM::lsl)
1322 .Case("lsr", ARM_AM::lsr)
1323 .Case("asr", ARM_AM::asr)
1324 .Case("ror", ARM_AM::ror)
1325 .Case("rrx", ARM_AM::rrx)
1326 .Default(ARM_AM::no_shift);
1328 if (ShiftTy == ARM_AM::no_shift)
1331 Parser.Lex(); // Eat the operator.
1333 // The source register for the shift has already been added to the
1334 // operand list, so we need to pop it off and combine it into the shifted
1335 // register operand instead.
1336 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1337 if (!PrevOp->isReg())
1338 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1339 int SrcReg = PrevOp->getReg();
1342 if (ShiftTy == ARM_AM::rrx) {
1343 // RRX Doesn't have an explicit shift amount. The encoder expects
1344 // the shift register to be the same as the source register. Seems odd,
1348 // Figure out if this is shifted by a constant or a register (for non-RRX).
1349 if (Parser.getTok().is(AsmToken::Hash)) {
1350 Parser.Lex(); // Eat hash.
1351 SMLoc ImmLoc = Parser.getTok().getLoc();
1352 const MCExpr *ShiftExpr = 0;
1353 if (getParser().ParseExpression(ShiftExpr)) {
1354 Error(ImmLoc, "invalid immediate shift value");
1357 // The expression must be evaluatable as an immediate.
1358 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1360 Error(ImmLoc, "invalid immediate shift value");
1363 // Range check the immediate.
1364 // lsl, ror: 0 <= imm <= 31
1365 // lsr, asr: 0 <= imm <= 32
1366 Imm = CE->getValue();
1368 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1369 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1370 Error(ImmLoc, "immediate shift value out of range");
1373 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1374 ShiftReg = tryParseRegister();
1375 SMLoc L = Parser.getTok().getLoc();
1376 if (ShiftReg == -1) {
1377 Error (L, "expected immediate or register in shift operand");
1381 Error (Parser.getTok().getLoc(),
1382 "expected immediate or register in shift operand");
1387 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1388 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1390 S, Parser.getTok().getLoc()));
1392 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1393 S, Parser.getTok().getLoc()));
1399 /// Try to parse a register name. The token must be an Identifier when called.
1400 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1401 /// if there is a "writeback". 'true' if it's not a register.
1403 /// TODO this is likely to change to allow different register types and or to
1404 /// parse for a specific register type.
1406 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1407 SMLoc S = Parser.getTok().getLoc();
1408 int RegNo = tryParseRegister();
1412 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1414 const AsmToken &ExclaimTok = Parser.getTok();
1415 if (ExclaimTok.is(AsmToken::Exclaim)) {
1416 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1417 ExclaimTok.getLoc()));
1418 Parser.Lex(); // Eat exclaim token
1424 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1425 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1427 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1428 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1430 switch (Name.size()) {
1433 if (Name[0] != CoprocOp)
1450 if (Name[0] != CoprocOp || Name[1] != '1')
1454 case '0': return 10;
1455 case '1': return 11;
1456 case '2': return 12;
1457 case '3': return 13;
1458 case '4': return 14;
1459 case '5': return 15;
1467 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1468 /// token must be an Identifier when called, and if it is a coprocessor
1469 /// number, the token is eaten and the operand is added to the operand list.
1470 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1471 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1472 SMLoc S = Parser.getTok().getLoc();
1473 const AsmToken &Tok = Parser.getTok();
1474 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1476 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1478 return MatchOperand_NoMatch;
1480 Parser.Lex(); // Eat identifier token.
1481 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1482 return MatchOperand_Success;
1485 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1486 /// token must be an Identifier when called, and if it is a coprocessor
1487 /// number, the token is eaten and the operand is added to the operand list.
1488 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1489 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1490 SMLoc S = Parser.getTok().getLoc();
1491 const AsmToken &Tok = Parser.getTok();
1492 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1494 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1496 return MatchOperand_NoMatch;
1498 Parser.Lex(); // Eat identifier token.
1499 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1500 return MatchOperand_Success;
1503 /// Parse a register list, return it if successful else return null. The first
1504 /// token must be a '{' when called.
1506 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1507 assert(Parser.getTok().is(AsmToken::LCurly) &&
1508 "Token is not a Left Curly Brace");
1509 SMLoc S = Parser.getTok().getLoc();
1511 // Read the rest of the registers in the list.
1512 unsigned PrevRegNum = 0;
1513 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1516 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1517 Parser.Lex(); // Eat non-identifier token.
1519 const AsmToken &RegTok = Parser.getTok();
1520 SMLoc RegLoc = RegTok.getLoc();
1521 if (RegTok.isNot(AsmToken::Identifier)) {
1522 Error(RegLoc, "register expected");
1526 int RegNum = tryParseRegister();
1528 Error(RegLoc, "register expected");
1533 int Reg = PrevRegNum;
1536 Registers.push_back(std::make_pair(Reg, RegLoc));
1537 } while (Reg != RegNum);
1539 Registers.push_back(std::make_pair(RegNum, RegLoc));
1542 PrevRegNum = RegNum;
1543 } while (Parser.getTok().is(AsmToken::Comma) ||
1544 Parser.getTok().is(AsmToken::Minus));
1546 // Process the right curly brace of the list.
1547 const AsmToken &RCurlyTok = Parser.getTok();
1548 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1549 Error(RCurlyTok.getLoc(), "'}' expected");
1553 SMLoc E = RCurlyTok.getLoc();
1554 Parser.Lex(); // Eat right curly brace token.
1556 // Verify the register list.
1557 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1558 RI = Registers.begin(), RE = Registers.end();
1560 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1561 bool EmittedWarning = false;
1563 DenseMap<unsigned, bool> RegMap;
1564 RegMap[HighRegNum] = true;
1566 for (++RI; RI != RE; ++RI) {
1567 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1568 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1571 Error(RegInfo.second, "register duplicated in register list");
1575 if (!EmittedWarning && Reg < HighRegNum)
1576 Warning(RegInfo.second,
1577 "register not in ascending order in register list");
1580 HighRegNum = std::max(Reg, HighRegNum);
1583 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1587 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1588 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1589 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1590 SMLoc S = Parser.getTok().getLoc();
1591 const AsmToken &Tok = Parser.getTok();
1592 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1593 StringRef OptStr = Tok.getString();
1595 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1596 .Case("sy", ARM_MB::SY)
1597 .Case("st", ARM_MB::ST)
1598 .Case("sh", ARM_MB::ISH)
1599 .Case("ish", ARM_MB::ISH)
1600 .Case("shst", ARM_MB::ISHST)
1601 .Case("ishst", ARM_MB::ISHST)
1602 .Case("nsh", ARM_MB::NSH)
1603 .Case("un", ARM_MB::NSH)
1604 .Case("nshst", ARM_MB::NSHST)
1605 .Case("unst", ARM_MB::NSHST)
1606 .Case("osh", ARM_MB::OSH)
1607 .Case("oshst", ARM_MB::OSHST)
1611 return MatchOperand_NoMatch;
1613 Parser.Lex(); // Eat identifier token.
1614 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1615 return MatchOperand_Success;
1618 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1619 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1620 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1621 SMLoc S = Parser.getTok().getLoc();
1622 const AsmToken &Tok = Parser.getTok();
1623 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1624 StringRef IFlagsStr = Tok.getString();
1626 unsigned IFlags = 0;
1627 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1628 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1629 .Case("a", ARM_PROC::A)
1630 .Case("i", ARM_PROC::I)
1631 .Case("f", ARM_PROC::F)
1634 // If some specific iflag is already set, it means that some letter is
1635 // present more than once, this is not acceptable.
1636 if (Flag == ~0U || (IFlags & Flag))
1637 return MatchOperand_NoMatch;
1642 Parser.Lex(); // Eat identifier token.
1643 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1644 return MatchOperand_Success;
1647 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1648 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1649 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1650 SMLoc S = Parser.getTok().getLoc();
1651 const AsmToken &Tok = Parser.getTok();
1652 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1653 StringRef Mask = Tok.getString();
1655 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1656 size_t Start = 0, Next = Mask.find('_');
1657 StringRef Flags = "";
1658 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1659 if (Next != StringRef::npos)
1660 Flags = Mask.slice(Next+1, Mask.size());
1662 // FlagsVal contains the complete mask:
1664 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1665 unsigned FlagsVal = 0;
1667 if (SpecReg == "apsr") {
1668 FlagsVal = StringSwitch<unsigned>(Flags)
1669 .Case("nzcvq", 0x8) // same as CPSR_f
1670 .Case("g", 0x4) // same as CPSR_s
1671 .Case("nzcvqg", 0xc) // same as CPSR_fs
1674 if (FlagsVal == ~0U) {
1676 return MatchOperand_NoMatch;
1678 FlagsVal = 0; // No flag
1680 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1681 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1683 for (int i = 0, e = Flags.size(); i != e; ++i) {
1684 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1691 // If some specific flag is already set, it means that some letter is
1692 // present more than once, this is not acceptable.
1693 if (FlagsVal == ~0U || (FlagsVal & Flag))
1694 return MatchOperand_NoMatch;
1697 } else // No match for special register.
1698 return MatchOperand_NoMatch;
1700 // Special register without flags are equivalent to "fc" flags.
1704 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1705 if (SpecReg == "spsr")
1708 Parser.Lex(); // Eat identifier token.
1709 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1710 return MatchOperand_Success;
1713 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1714 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1715 int Low, int High) {
1716 const AsmToken &Tok = Parser.getTok();
1717 if (Tok.isNot(AsmToken::Identifier)) {
1718 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1719 return MatchOperand_ParseFail;
1721 StringRef ShiftName = Tok.getString();
1722 std::string LowerOp = LowercaseString(Op);
1723 std::string UpperOp = UppercaseString(Op);
1724 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1725 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1726 return MatchOperand_ParseFail;
1728 Parser.Lex(); // Eat shift type token.
1730 // There must be a '#' and a shift amount.
1731 if (Parser.getTok().isNot(AsmToken::Hash)) {
1732 Error(Parser.getTok().getLoc(), "'#' expected");
1733 return MatchOperand_ParseFail;
1735 Parser.Lex(); // Eat hash token.
1737 const MCExpr *ShiftAmount;
1738 SMLoc Loc = Parser.getTok().getLoc();
1739 if (getParser().ParseExpression(ShiftAmount)) {
1740 Error(Loc, "illegal expression");
1741 return MatchOperand_ParseFail;
1743 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1745 Error(Loc, "constant expression expected");
1746 return MatchOperand_ParseFail;
1748 int Val = CE->getValue();
1749 if (Val < Low || Val > High) {
1750 Error(Loc, "immediate value out of range");
1751 return MatchOperand_ParseFail;
1754 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1756 return MatchOperand_Success;
1759 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1760 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1761 const AsmToken &Tok = Parser.getTok();
1762 SMLoc S = Tok.getLoc();
1763 if (Tok.isNot(AsmToken::Identifier)) {
1764 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1765 return MatchOperand_ParseFail;
1767 int Val = StringSwitch<int>(Tok.getString())
1771 Parser.Lex(); // Eat the token.
1774 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1775 return MatchOperand_ParseFail;
1777 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1779 S, Parser.getTok().getLoc()));
1780 return MatchOperand_Success;
1783 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1784 /// instructions. Legal values are:
1785 /// lsl #n 'n' in [0,31]
1786 /// asr #n 'n' in [1,32]
1787 /// n == 32 encoded as n == 0.
1788 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1789 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1790 const AsmToken &Tok = Parser.getTok();
1791 SMLoc S = Tok.getLoc();
1792 if (Tok.isNot(AsmToken::Identifier)) {
1793 Error(S, "shift operator 'asr' or 'lsl' expected");
1794 return MatchOperand_ParseFail;
1796 StringRef ShiftName = Tok.getString();
1798 if (ShiftName == "lsl" || ShiftName == "LSL")
1800 else if (ShiftName == "asr" || ShiftName == "ASR")
1803 Error(S, "shift operator 'asr' or 'lsl' expected");
1804 return MatchOperand_ParseFail;
1806 Parser.Lex(); // Eat the operator.
1808 // A '#' and a shift amount.
1809 if (Parser.getTok().isNot(AsmToken::Hash)) {
1810 Error(Parser.getTok().getLoc(), "'#' expected");
1811 return MatchOperand_ParseFail;
1813 Parser.Lex(); // Eat hash token.
1815 const MCExpr *ShiftAmount;
1816 SMLoc E = Parser.getTok().getLoc();
1817 if (getParser().ParseExpression(ShiftAmount)) {
1818 Error(E, "malformed shift expression");
1819 return MatchOperand_ParseFail;
1821 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1823 Error(E, "shift amount must be an immediate");
1824 return MatchOperand_ParseFail;
1827 int64_t Val = CE->getValue();
1829 // Shift amount must be in [1,32]
1830 if (Val < 1 || Val > 32) {
1831 Error(E, "'asr' shift amount must be in range [1,32]");
1832 return MatchOperand_ParseFail;
1834 // asr #32 encoded as asr #0.
1835 if (Val == 32) Val = 0;
1837 // Shift amount must be in [1,32]
1838 if (Val < 0 || Val > 31) {
1839 Error(E, "'lsr' shift amount must be in range [0,31]");
1840 return MatchOperand_ParseFail;
1844 E = Parser.getTok().getLoc();
1845 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1847 return MatchOperand_Success;
1850 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1851 /// of instructions. Legal values are:
1852 /// ror #n 'n' in {0, 8, 16, 24}
1853 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1854 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1855 const AsmToken &Tok = Parser.getTok();
1856 SMLoc S = Tok.getLoc();
1857 if (Tok.isNot(AsmToken::Identifier)) {
1858 Error(S, "rotate operator 'ror' expected");
1859 return MatchOperand_ParseFail;
1861 StringRef ShiftName = Tok.getString();
1862 if (ShiftName != "ror" && ShiftName != "ROR") {
1863 Error(S, "rotate operator 'ror' expected");
1864 return MatchOperand_ParseFail;
1866 Parser.Lex(); // Eat the operator.
1868 // A '#' and a rotate amount.
1869 if (Parser.getTok().isNot(AsmToken::Hash)) {
1870 Error(Parser.getTok().getLoc(), "'#' expected");
1871 return MatchOperand_ParseFail;
1873 Parser.Lex(); // Eat hash token.
1875 const MCExpr *ShiftAmount;
1876 SMLoc E = Parser.getTok().getLoc();
1877 if (getParser().ParseExpression(ShiftAmount)) {
1878 Error(E, "malformed rotate expression");
1879 return MatchOperand_ParseFail;
1881 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1883 Error(E, "rotate amount must be an immediate");
1884 return MatchOperand_ParseFail;
1887 int64_t Val = CE->getValue();
1888 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1889 // normally, zero is represented in asm by omitting the rotate operand
1891 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1892 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1893 return MatchOperand_ParseFail;
1896 E = Parser.getTok().getLoc();
1897 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1899 return MatchOperand_Success;
1902 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1903 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1904 SMLoc S = Parser.getTok().getLoc();
1905 // The bitfield descriptor is really two operands, the LSB and the width.
1906 if (Parser.getTok().isNot(AsmToken::Hash)) {
1907 Error(Parser.getTok().getLoc(), "'#' expected");
1908 return MatchOperand_ParseFail;
1910 Parser.Lex(); // Eat hash token.
1912 const MCExpr *LSBExpr;
1913 SMLoc E = Parser.getTok().getLoc();
1914 if (getParser().ParseExpression(LSBExpr)) {
1915 Error(E, "malformed immediate expression");
1916 return MatchOperand_ParseFail;
1918 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
1920 Error(E, "'lsb' operand must be an immediate");
1921 return MatchOperand_ParseFail;
1924 int64_t LSB = CE->getValue();
1925 // The LSB must be in the range [0,31]
1926 if (LSB < 0 || LSB > 31) {
1927 Error(E, "'lsb' operand must be in the range [0,31]");
1928 return MatchOperand_ParseFail;
1930 E = Parser.getTok().getLoc();
1932 // Expect another immediate operand.
1933 if (Parser.getTok().isNot(AsmToken::Comma)) {
1934 Error(Parser.getTok().getLoc(), "too few operands");
1935 return MatchOperand_ParseFail;
1937 Parser.Lex(); // Eat hash token.
1938 if (Parser.getTok().isNot(AsmToken::Hash)) {
1939 Error(Parser.getTok().getLoc(), "'#' expected");
1940 return MatchOperand_ParseFail;
1942 Parser.Lex(); // Eat hash token.
1944 const MCExpr *WidthExpr;
1945 if (getParser().ParseExpression(WidthExpr)) {
1946 Error(E, "malformed immediate expression");
1947 return MatchOperand_ParseFail;
1949 CE = dyn_cast<MCConstantExpr>(WidthExpr);
1951 Error(E, "'width' operand must be an immediate");
1952 return MatchOperand_ParseFail;
1955 int64_t Width = CE->getValue();
1956 // The LSB must be in the range [1,32-lsb]
1957 if (Width < 1 || Width > 32 - LSB) {
1958 Error(E, "'width' operand must be in the range [1,32-lsb]");
1959 return MatchOperand_ParseFail;
1961 E = Parser.getTok().getLoc();
1963 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
1965 return MatchOperand_Success;
1968 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1969 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1970 // Check for a post-index addressing register operand. Specifically:
1971 // postidx_reg := '+' register {, shift}
1972 // | '-' register {, shift}
1973 // | register {, shift}
1975 // This method must return MatchOperand_NoMatch without consuming any tokens
1976 // in the case where there is no match, as other alternatives take other
1978 AsmToken Tok = Parser.getTok();
1979 SMLoc S = Tok.getLoc();
1980 bool haveEaten = false;
1983 if (Tok.is(AsmToken::Plus)) {
1984 Parser.Lex(); // Eat the '+' token.
1986 } else if (Tok.is(AsmToken::Minus)) {
1987 Parser.Lex(); // Eat the '-' token.
1991 if (Parser.getTok().is(AsmToken::Identifier))
1992 Reg = tryParseRegister();
1995 return MatchOperand_NoMatch;
1996 Error(Parser.getTok().getLoc(), "register expected");
1997 return MatchOperand_ParseFail;
1999 SMLoc E = Parser.getTok().getLoc();
2001 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2002 unsigned ShiftImm = 0;
2003 if (Parser.getTok().is(AsmToken::Comma)) {
2004 Parser.Lex(); // Eat the ','.
2005 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2006 return MatchOperand_ParseFail;
2009 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2012 return MatchOperand_Success;
2015 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2016 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2017 // Check for a post-index addressing register operand. Specifically:
2018 // am3offset := '+' register
2025 // This method must return MatchOperand_NoMatch without consuming any tokens
2026 // in the case where there is no match, as other alternatives take other
2028 AsmToken Tok = Parser.getTok();
2029 SMLoc S = Tok.getLoc();
2031 // Do immediates first, as we always parse those if we have a '#'.
2032 if (Parser.getTok().is(AsmToken::Hash)) {
2033 Parser.Lex(); // Eat the '#'.
2034 // Explicitly look for a '-', as we need to encode negative zero
2036 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2037 const MCExpr *Offset;
2038 if (getParser().ParseExpression(Offset))
2039 return MatchOperand_ParseFail;
2040 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2042 Error(S, "constant expression expected");
2043 return MatchOperand_ParseFail;
2045 SMLoc E = Tok.getLoc();
2046 // Negative zero is encoded as the flag value INT32_MIN.
2047 int32_t Val = CE->getValue();
2048 if (isNegative && Val == 0)
2052 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2054 return MatchOperand_Success;
2058 bool haveEaten = false;
2061 if (Tok.is(AsmToken::Plus)) {
2062 Parser.Lex(); // Eat the '+' token.
2064 } else if (Tok.is(AsmToken::Minus)) {
2065 Parser.Lex(); // Eat the '-' token.
2069 if (Parser.getTok().is(AsmToken::Identifier))
2070 Reg = tryParseRegister();
2073 return MatchOperand_NoMatch;
2074 Error(Parser.getTok().getLoc(), "register expected");
2075 return MatchOperand_ParseFail;
2077 SMLoc E = Parser.getTok().getLoc();
2079 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2082 return MatchOperand_Success;
2085 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2086 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2087 /// when they refer multiple MIOperands inside a single one.
2089 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2090 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2091 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2093 // Create a writeback register dummy placeholder.
2094 Inst.addOperand(MCOperand::CreateImm(0));
2096 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2097 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2101 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2102 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2103 /// when they refer multiple MIOperands inside a single one.
2105 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2106 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2107 // Create a writeback register dummy placeholder.
2108 Inst.addOperand(MCOperand::CreateImm(0));
2109 assert(0 && "cvtStWriteBackRegAddrMode2 not implemented yet!");
2113 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2114 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2115 /// when they refer multiple MIOperands inside a single one.
2117 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2118 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2120 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2121 // Create a writeback register dummy placeholder.
2122 Inst.addOperand(MCOperand::CreateImm(0));
2124 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2126 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2128 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2132 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2133 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2134 /// when they refer multiple MIOperands inside a single one.
2136 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2137 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2139 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2140 // Create a writeback register dummy placeholder.
2141 Inst.addOperand(MCOperand::CreateImm(0));
2143 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2145 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2147 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2151 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2152 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2153 /// when they refer multiple MIOperands inside a single one.
2155 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2156 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2157 // Create a writeback register dummy placeholder.
2158 Inst.addOperand(MCOperand::CreateImm(0));
2160 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2162 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2164 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2166 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2170 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2171 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2172 /// when they refer multiple MIOperands inside a single one.
2174 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2175 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2176 // Create a writeback register dummy placeholder.
2177 Inst.addOperand(MCOperand::CreateImm(0));
2179 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2181 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2183 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2185 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2189 /// cvtLdrdPre - Convert parsed operands to MCInst.
2190 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2191 /// when they refer multiple MIOperands inside a single one.
2193 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2194 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2196 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2197 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2198 // Create a writeback register dummy placeholder.
2199 Inst.addOperand(MCOperand::CreateImm(0));
2201 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2203 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2207 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2208 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2209 /// when they refer multiple MIOperands inside a single one.
2211 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2212 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2213 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2214 // Create a writeback register dummy placeholder.
2215 Inst.addOperand(MCOperand::CreateImm(0));
2216 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2217 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2222 /// Parse an ARM memory expression, return false if successful else return true
2223 /// or an error. The first token must be a '[' when called.
2225 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2227 assert(Parser.getTok().is(AsmToken::LBrac) &&
2228 "Token is not a Left Bracket");
2229 S = Parser.getTok().getLoc();
2230 Parser.Lex(); // Eat left bracket token.
2232 const AsmToken &BaseRegTok = Parser.getTok();
2233 int BaseRegNum = tryParseRegister();
2234 if (BaseRegNum == -1)
2235 return Error(BaseRegTok.getLoc(), "register expected");
2237 // The next token must either be a comma or a closing bracket.
2238 const AsmToken &Tok = Parser.getTok();
2239 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2240 return Error(Tok.getLoc(), "malformed memory operand");
2242 if (Tok.is(AsmToken::RBrac)) {
2244 Parser.Lex(); // Eat right bracket token.
2246 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2252 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2253 Parser.Lex(); // Eat the comma.
2255 // If we have a '#' it's an immediate offset, else assume it's a register
2257 if (Parser.getTok().is(AsmToken::Hash)) {
2258 Parser.Lex(); // Eat the '#'.
2259 E = Parser.getTok().getLoc();
2261 // FIXME: Special case #-0 so we can correctly set the U bit.
2263 const MCExpr *Offset;
2264 if (getParser().ParseExpression(Offset))
2267 // The expression has to be a constant. Memory references with relocations
2268 // don't come through here, as they use the <label> forms of the relevant
2270 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2272 return Error (E, "constant expression expected");
2274 // Now we should have the closing ']'
2275 E = Parser.getTok().getLoc();
2276 if (Parser.getTok().isNot(AsmToken::RBrac))
2277 return Error(E, "']' expected");
2278 Parser.Lex(); // Eat right bracket token.
2280 // Don't worry about range checking the value here. That's handled by
2281 // the is*() predicates.
2282 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2283 ARM_AM::no_shift, 0, false, S,E));
2285 // If there's a pre-indexing writeback marker, '!', just add it as a token
2287 if (Parser.getTok().is(AsmToken::Exclaim)) {
2288 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2289 Parser.Lex(); // Eat the '!'.
2295 // The register offset is optionally preceded by a '+' or '-'
2296 bool isNegative = false;
2297 if (Parser.getTok().is(AsmToken::Minus)) {
2299 Parser.Lex(); // Eat the '-'.
2300 } else if (Parser.getTok().is(AsmToken::Plus)) {
2302 Parser.Lex(); // Eat the '+'.
2305 E = Parser.getTok().getLoc();
2306 int OffsetRegNum = tryParseRegister();
2307 if (OffsetRegNum == -1)
2308 return Error(E, "register expected");
2310 // If there's a shift operator, handle it.
2311 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2312 unsigned ShiftImm = 0;
2313 if (Parser.getTok().is(AsmToken::Comma)) {
2314 Parser.Lex(); // Eat the ','.
2315 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2319 // Now we should have the closing ']'
2320 E = Parser.getTok().getLoc();
2321 if (Parser.getTok().isNot(AsmToken::RBrac))
2322 return Error(E, "']' expected");
2323 Parser.Lex(); // Eat right bracket token.
2325 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2326 ShiftType, ShiftImm, isNegative,
2329 // If there's a pre-indexing writeback marker, '!', just add it as a token
2331 if (Parser.getTok().is(AsmToken::Exclaim)) {
2332 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2333 Parser.Lex(); // Eat the '!'.
2339 /// parseMemRegOffsetShift - one of these two:
2340 /// ( lsl | lsr | asr | ror ) , # shift_amount
2342 /// return true if it parses a shift otherwise it returns false.
2343 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2345 SMLoc Loc = Parser.getTok().getLoc();
2346 const AsmToken &Tok = Parser.getTok();
2347 if (Tok.isNot(AsmToken::Identifier))
2349 StringRef ShiftName = Tok.getString();
2350 if (ShiftName == "lsl" || ShiftName == "LSL")
2352 else if (ShiftName == "lsr" || ShiftName == "LSR")
2354 else if (ShiftName == "asr" || ShiftName == "ASR")
2356 else if (ShiftName == "ror" || ShiftName == "ROR")
2358 else if (ShiftName == "rrx" || ShiftName == "RRX")
2361 return Error(Loc, "illegal shift operator");
2362 Parser.Lex(); // Eat shift type token.
2364 // rrx stands alone.
2366 if (St != ARM_AM::rrx) {
2367 Loc = Parser.getTok().getLoc();
2368 // A '#' and a shift amount.
2369 const AsmToken &HashTok = Parser.getTok();
2370 if (HashTok.isNot(AsmToken::Hash))
2371 return Error(HashTok.getLoc(), "'#' expected");
2372 Parser.Lex(); // Eat hash token.
2375 if (getParser().ParseExpression(Expr))
2377 // Range check the immediate.
2378 // lsl, ror: 0 <= imm <= 31
2379 // lsr, asr: 0 <= imm <= 32
2380 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2382 return Error(Loc, "shift amount must be an immediate");
2383 int64_t Imm = CE->getValue();
2385 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2386 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2387 return Error(Loc, "immediate shift value out of range");
2394 /// Parse a arm instruction operand. For now this parses the operand regardless
2395 /// of the mnemonic.
2396 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2397 StringRef Mnemonic) {
2400 // Check if the current operand has a custom associated parser, if so, try to
2401 // custom parse the operand, or fallback to the general approach.
2402 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2403 if (ResTy == MatchOperand_Success)
2405 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2406 // there was a match, but an error occurred, in which case, just return that
2407 // the operand parsing failed.
2408 if (ResTy == MatchOperand_ParseFail)
2411 switch (getLexer().getKind()) {
2413 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2415 case AsmToken::Identifier: {
2416 if (!tryParseRegisterWithWriteBack(Operands))
2418 int Res = tryParseShiftRegister(Operands);
2419 if (Res == 0) // success
2421 else if (Res == -1) // irrecoverable error
2424 // Fall though for the Identifier case that is not a register or a
2427 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2428 case AsmToken::Dot: { // . as a branch target
2429 // This was not a register so parse other operands that start with an
2430 // identifier (like labels) as expressions and create them as immediates.
2431 const MCExpr *IdVal;
2432 S = Parser.getTok().getLoc();
2433 if (getParser().ParseExpression(IdVal))
2435 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2436 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2439 case AsmToken::LBrac:
2440 return parseMemory(Operands);
2441 case AsmToken::LCurly:
2442 return parseRegisterList(Operands);
2443 case AsmToken::Hash:
2444 // #42 -> immediate.
2445 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2446 S = Parser.getTok().getLoc();
2448 const MCExpr *ImmVal;
2449 if (getParser().ParseExpression(ImmVal))
2451 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2452 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2454 case AsmToken::Colon: {
2455 // ":lower16:" and ":upper16:" expression prefixes
2456 // FIXME: Check it's an expression prefix,
2457 // e.g. (FOO - :lower16:BAR) isn't legal.
2458 ARMMCExpr::VariantKind RefKind;
2459 if (parsePrefix(RefKind))
2462 const MCExpr *SubExprVal;
2463 if (getParser().ParseExpression(SubExprVal))
2466 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2468 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2469 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2475 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2476 // :lower16: and :upper16:.
2477 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2478 RefKind = ARMMCExpr::VK_ARM_None;
2480 // :lower16: and :upper16: modifiers
2481 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2482 Parser.Lex(); // Eat ':'
2484 if (getLexer().isNot(AsmToken::Identifier)) {
2485 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2489 StringRef IDVal = Parser.getTok().getIdentifier();
2490 if (IDVal == "lower16") {
2491 RefKind = ARMMCExpr::VK_ARM_LO16;
2492 } else if (IDVal == "upper16") {
2493 RefKind = ARMMCExpr::VK_ARM_HI16;
2495 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2500 if (getLexer().isNot(AsmToken::Colon)) {
2501 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2504 Parser.Lex(); // Eat the last ':'
2509 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2510 MCSymbolRefExpr::VariantKind Variant) {
2511 // Recurse over the given expression, rebuilding it to apply the given variant
2512 // to the leftmost symbol.
2513 if (Variant == MCSymbolRefExpr::VK_None)
2516 switch (E->getKind()) {
2517 case MCExpr::Target:
2518 llvm_unreachable("Can't handle target expr yet");
2519 case MCExpr::Constant:
2520 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2522 case MCExpr::SymbolRef: {
2523 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2525 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2528 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2532 llvm_unreachable("Can't handle unary expressions yet");
2534 case MCExpr::Binary: {
2535 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2536 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2537 const MCExpr *RHS = BE->getRHS();
2541 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2545 assert(0 && "Invalid expression kind!");
2549 /// \brief Given a mnemonic, split out possible predication code and carry
2550 /// setting letters to form a canonical mnemonic and flags.
2552 // FIXME: Would be nice to autogen this.
2553 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2554 unsigned &PredicationCode,
2556 unsigned &ProcessorIMod) {
2557 PredicationCode = ARMCC::AL;
2558 CarrySetting = false;
2561 // Ignore some mnemonics we know aren't predicated forms.
2563 // FIXME: Would be nice to autogen this.
2564 if ((Mnemonic == "movs" && isThumb()) ||
2565 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2566 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2567 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2568 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2569 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2570 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2571 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2574 // First, split out any predication code. Ignore mnemonics we know aren't
2575 // predicated but do have a carry-set and so weren't caught above.
2576 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2577 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2578 Mnemonic != "umlals" && Mnemonic != "umulls") {
2579 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2580 .Case("eq", ARMCC::EQ)
2581 .Case("ne", ARMCC::NE)
2582 .Case("hs", ARMCC::HS)
2583 .Case("cs", ARMCC::HS)
2584 .Case("lo", ARMCC::LO)
2585 .Case("cc", ARMCC::LO)
2586 .Case("mi", ARMCC::MI)
2587 .Case("pl", ARMCC::PL)
2588 .Case("vs", ARMCC::VS)
2589 .Case("vc", ARMCC::VC)
2590 .Case("hi", ARMCC::HI)
2591 .Case("ls", ARMCC::LS)
2592 .Case("ge", ARMCC::GE)
2593 .Case("lt", ARMCC::LT)
2594 .Case("gt", ARMCC::GT)
2595 .Case("le", ARMCC::LE)
2596 .Case("al", ARMCC::AL)
2599 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2600 PredicationCode = CC;
2604 // Next, determine if we have a carry setting bit. We explicitly ignore all
2605 // the instructions we know end in 's'.
2606 if (Mnemonic.endswith("s") &&
2607 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
2608 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2609 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2610 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2611 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2612 (Mnemonic == "movs" && isThumb()))) {
2613 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2614 CarrySetting = true;
2617 // The "cps" instruction can have a interrupt mode operand which is glued into
2618 // the mnemonic. Check if this is the case, split it and parse the imod op
2619 if (Mnemonic.startswith("cps")) {
2620 // Split out any imod code.
2622 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2623 .Case("ie", ARM_PROC::IE)
2624 .Case("id", ARM_PROC::ID)
2627 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2628 ProcessorIMod = IMod;
2635 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2636 /// inclusion of carry set or predication code operands.
2638 // FIXME: It would be nice to autogen this.
2640 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2641 bool &CanAcceptPredicationCode) {
2642 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2643 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2644 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2645 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2646 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2647 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2648 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2649 Mnemonic == "eor" || Mnemonic == "smlal" ||
2650 (Mnemonic == "mov" && !isThumbOne())) {
2651 CanAcceptCarrySet = true;
2653 CanAcceptCarrySet = false;
2656 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2657 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2658 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2659 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2660 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2661 Mnemonic == "setend" ||
2662 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2663 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2665 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2666 CanAcceptPredicationCode = false;
2668 CanAcceptPredicationCode = true;
2672 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2673 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2674 CanAcceptPredicationCode = false;
2677 /// Parse an arm instruction mnemonic followed by its operands.
2678 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2679 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2680 // Create the leading tokens for the mnemonic, split by '.' characters.
2681 size_t Start = 0, Next = Name.find('.');
2682 StringRef Mnemonic = Name.slice(Start, Next);
2684 // Split out the predication code and carry setting flag from the mnemonic.
2685 unsigned PredicationCode;
2686 unsigned ProcessorIMod;
2688 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2691 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2693 // FIXME: This is all a pretty gross hack. We should automatically handle
2694 // optional operands like this via tblgen.
2696 // Next, add the CCOut and ConditionCode operands, if needed.
2698 // For mnemonics which can ever incorporate a carry setting bit or predication
2699 // code, our matching model involves us always generating CCOut and
2700 // ConditionCode operands to match the mnemonic "as written" and then we let
2701 // the matcher deal with finding the right instruction or generating an
2702 // appropriate error.
2703 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2704 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2706 // If we had a carry-set on an instruction that can't do that, issue an
2708 if (!CanAcceptCarrySet && CarrySetting) {
2709 Parser.EatToEndOfStatement();
2710 return Error(NameLoc, "instruction '" + Mnemonic +
2711 "' can not set flags, but 's' suffix specified");
2713 // If we had a predication code on an instruction that can't do that, issue an
2715 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2716 Parser.EatToEndOfStatement();
2717 return Error(NameLoc, "instruction '" + Mnemonic +
2718 "' is not predicable, but condition code specified");
2721 // Add the carry setting operand, if necessary.
2723 // FIXME: It would be awesome if we could somehow invent a location such that
2724 // match errors on this operand would print a nice diagnostic about how the
2725 // 's' character in the mnemonic resulted in a CCOut operand.
2726 if (CanAcceptCarrySet)
2727 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2730 // Add the predication code operand, if necessary.
2731 if (CanAcceptPredicationCode) {
2732 Operands.push_back(ARMOperand::CreateCondCode(
2733 ARMCC::CondCodes(PredicationCode), NameLoc));
2736 // Add the processor imod operand, if necessary.
2737 if (ProcessorIMod) {
2738 Operands.push_back(ARMOperand::CreateImm(
2739 MCConstantExpr::Create(ProcessorIMod, getContext()),
2742 // This mnemonic can't ever accept a imod, but the user wrote
2743 // one (or misspelled another mnemonic).
2745 // FIXME: Issue a nice error.
2748 // Add the remaining tokens in the mnemonic.
2749 while (Next != StringRef::npos) {
2751 Next = Name.find('.', Start + 1);
2752 StringRef ExtraToken = Name.slice(Start, Next);
2754 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2757 // Read the remaining operands.
2758 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2759 // Read the first operand.
2760 if (parseOperand(Operands, Mnemonic)) {
2761 Parser.EatToEndOfStatement();
2765 while (getLexer().is(AsmToken::Comma)) {
2766 Parser.Lex(); // Eat the comma.
2768 // Parse and remember the operand.
2769 if (parseOperand(Operands, Mnemonic)) {
2770 Parser.EatToEndOfStatement();
2776 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2777 Parser.EatToEndOfStatement();
2778 return TokError("unexpected token in argument list");
2781 Parser.Lex(); // Consume the EndOfStatement
2784 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2785 // another does not. Specifically, the MOVW instruction does not. So we
2786 // special case it here and remove the defaulted (non-setting) cc_out
2787 // operand if that's the instruction we're trying to match.
2789 // We do this post-processing of the explicit operands rather than just
2790 // conditionally adding the cc_out in the first place because we need
2791 // to check the type of the parsed immediate operand.
2792 if (Mnemonic == "mov" && Operands.size() > 4 &&
2793 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2794 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2795 static_cast<ARMOperand*>(Operands[1])->getReg() == 0) {
2796 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2797 Operands.erase(Operands.begin() + 1);
2801 // ARM mode 'blx' need special handling, as the register operand version
2802 // is predicable, but the label operand version is not. So, we can't rely
2803 // on the Mnemonic based checking to correctly figure out when to put
2804 // a CondCode operand in the list. If we're trying to match the label
2805 // version, remove the CondCode operand here.
2806 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2807 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2808 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2809 Operands.erase(Operands.begin() + 1);
2815 // Validate context-sensitive operand constraints.
2816 // FIXME: We would really like to be able to tablegen'erate this.
2818 validateInstruction(MCInst &Inst,
2819 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2820 switch (Inst.getOpcode()) {
2823 case ARM::LDRD_POST:
2825 // Rt2 must be Rt + 1.
2826 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2827 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2829 return Error(Operands[3]->getStartLoc(),
2830 "destination operands must be sequential");
2835 case ARM::STRD_POST:
2837 // Rt2 must be Rt + 1.
2838 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2839 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
2841 return Error(Operands[4]->getStartLoc(),
2842 "source operands must be sequential");
2847 // width must be in range [1, 32-lsb]
2848 unsigned lsb = Inst.getOperand(2).getImm();
2849 unsigned widthm1 = Inst.getOperand(3).getImm();
2850 if (widthm1 >= 32 - lsb)
2851 return Error(Operands[5]->getStartLoc(),
2852 "bitfield width must be in range [1,32-lsb]");
2860 MatchAndEmitInstruction(SMLoc IDLoc,
2861 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2865 MatchResultTy MatchResult;
2866 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2867 switch (MatchResult) {
2869 // Context sensitive operand constraints aren't handled by the matcher,
2870 // so check them here.
2871 if (validateInstruction(Inst, Operands))
2874 Out.EmitInstruction(Inst);
2876 case Match_MissingFeature:
2877 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2879 case Match_InvalidOperand: {
2880 SMLoc ErrorLoc = IDLoc;
2881 if (ErrorInfo != ~0U) {
2882 if (ErrorInfo >= Operands.size())
2883 return Error(IDLoc, "too few operands for instruction");
2885 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2886 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2889 return Error(ErrorLoc, "invalid operand for instruction");
2891 case Match_MnemonicFail:
2892 return Error(IDLoc, "unrecognized instruction mnemonic");
2893 case Match_ConversionFail:
2894 return Error(IDLoc, "unable to convert operands to instruction");
2897 llvm_unreachable("Implement any new match types added!");
2901 /// parseDirective parses the arm specific directives
2902 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2903 StringRef IDVal = DirectiveID.getIdentifier();
2904 if (IDVal == ".word")
2905 return parseDirectiveWord(4, DirectiveID.getLoc());
2906 else if (IDVal == ".thumb")
2907 return parseDirectiveThumb(DirectiveID.getLoc());
2908 else if (IDVal == ".thumb_func")
2909 return parseDirectiveThumbFunc(DirectiveID.getLoc());
2910 else if (IDVal == ".code")
2911 return parseDirectiveCode(DirectiveID.getLoc());
2912 else if (IDVal == ".syntax")
2913 return parseDirectiveSyntax(DirectiveID.getLoc());
2917 /// parseDirectiveWord
2918 /// ::= .word [ expression (, expression)* ]
2919 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
2920 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2922 const MCExpr *Value;
2923 if (getParser().ParseExpression(Value))
2926 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2928 if (getLexer().is(AsmToken::EndOfStatement))
2931 // FIXME: Improve diagnostic.
2932 if (getLexer().isNot(AsmToken::Comma))
2933 return Error(L, "unexpected token in directive");
2942 /// parseDirectiveThumb
2944 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
2945 if (getLexer().isNot(AsmToken::EndOfStatement))
2946 return Error(L, "unexpected token in directive");
2949 // TODO: set thumb mode
2950 // TODO: tell the MC streamer the mode
2951 // getParser().getStreamer().Emit???();
2955 /// parseDirectiveThumbFunc
2956 /// ::= .thumbfunc symbol_name
2957 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
2958 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
2959 bool isMachO = MAI.hasSubsectionsViaSymbols();
2962 // Darwin asm has function name after .thumb_func direction
2965 const AsmToken &Tok = Parser.getTok();
2966 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
2967 return Error(L, "unexpected token in .thumb_func directive");
2968 Name = Tok.getString();
2969 Parser.Lex(); // Consume the identifier token.
2972 if (getLexer().isNot(AsmToken::EndOfStatement))
2973 return Error(L, "unexpected token in directive");
2976 // FIXME: assuming function name will be the line following .thumb_func
2978 Name = Parser.getTok().getString();
2981 // Mark symbol as a thumb symbol.
2982 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
2983 getParser().getStreamer().EmitThumbFunc(Func);
2987 /// parseDirectiveSyntax
2988 /// ::= .syntax unified | divided
2989 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
2990 const AsmToken &Tok = Parser.getTok();
2991 if (Tok.isNot(AsmToken::Identifier))
2992 return Error(L, "unexpected token in .syntax directive");
2993 StringRef Mode = Tok.getString();
2994 if (Mode == "unified" || Mode == "UNIFIED")
2996 else if (Mode == "divided" || Mode == "DIVIDED")
2997 return Error(L, "'.syntax divided' arm asssembly not supported");
2999 return Error(L, "unrecognized syntax mode in .syntax directive");
3001 if (getLexer().isNot(AsmToken::EndOfStatement))
3002 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3005 // TODO tell the MC streamer the mode
3006 // getParser().getStreamer().Emit???();
3010 /// parseDirectiveCode
3011 /// ::= .code 16 | 32
3012 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3013 const AsmToken &Tok = Parser.getTok();
3014 if (Tok.isNot(AsmToken::Integer))
3015 return Error(L, "unexpected token in .code directive");
3016 int64_t Val = Parser.getTok().getIntVal();
3022 return Error(L, "invalid operand to .code directive");
3024 if (getLexer().isNot(AsmToken::EndOfStatement))
3025 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3031 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3036 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3043 extern "C" void LLVMInitializeARMAsmLexer();
3045 /// Force static initialization.
3046 extern "C" void LLVMInitializeARMAsmParser() {
3047 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3048 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3049 LLVMInitializeARMAsmLexer();
3052 #define GET_REGISTER_MATCHER
3053 #define GET_MATCHER_IMPLEMENTATION
3054 #include "ARMGenAsmMatcher.inc"