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 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
123 const SmallVectorImpl<MCParsedAsmOperand*> &);
124 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
125 const SmallVectorImpl<MCParsedAsmOperand*> &);
126 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
127 const SmallVectorImpl<MCParsedAsmOperand*> &);
128 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
129 const SmallVectorImpl<MCParsedAsmOperand*> &);
130 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
131 const SmallVectorImpl<MCParsedAsmOperand*> &);
132 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
133 const SmallVectorImpl<MCParsedAsmOperand*> &);
134 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
135 const SmallVectorImpl<MCParsedAsmOperand*> &);
136 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
137 const SmallVectorImpl<MCParsedAsmOperand*> &);
139 bool validateInstruction(MCInst &Inst,
140 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
141 void processInstruction(MCInst &Inst,
142 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
145 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
146 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
147 MCAsmParserExtension::Initialize(_Parser);
149 // Initialize the set of available features.
150 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
153 // Implementation of the MCTargetAsmParser interface:
154 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
155 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
156 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
157 bool ParseDirective(AsmToken DirectiveID);
159 bool MatchAndEmitInstruction(SMLoc IDLoc,
160 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
163 } // end anonymous namespace
167 /// ARMOperand - Instances of this class represent a parsed ARM machine
169 class ARMOperand : public MCParsedAsmOperand {
193 SMLoc StartLoc, EndLoc;
194 SmallVector<unsigned, 8> Registers;
198 ARMCC::CondCodes Val;
210 ARM_PROC::IFlags Val;
230 /// Combined record for all forms of ARM address expressions.
233 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
235 const MCConstantExpr *OffsetImm; // Offset immediate value
236 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
237 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
238 unsigned ShiftImm; // shift for OffsetReg.
239 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
245 ARM_AM::ShiftOpc ShiftTy;
254 ARM_AM::ShiftOpc ShiftTy;
260 ARM_AM::ShiftOpc ShiftTy;
273 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
275 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
277 StartLoc = o.StartLoc;
291 case DPRRegisterList:
292 case SPRRegisterList:
293 Registers = o.Registers;
308 case PostIndexRegister:
309 PostIdxReg = o.PostIdxReg;
317 case ShifterImmediate:
318 ShifterImm = o.ShifterImm;
320 case ShiftedRegister:
321 RegShiftedReg = o.RegShiftedReg;
323 case ShiftedImmediate:
324 RegShiftedImm = o.RegShiftedImm;
326 case RotateImmediate:
329 case BitfieldDescriptor:
330 Bitfield = o.Bitfield;
335 /// getStartLoc - Get the location of the first token of this operand.
336 SMLoc getStartLoc() const { return StartLoc; }
337 /// getEndLoc - Get the location of the last token of this operand.
338 SMLoc getEndLoc() const { return EndLoc; }
340 ARMCC::CondCodes getCondCode() const {
341 assert(Kind == CondCode && "Invalid access!");
345 unsigned getCoproc() const {
346 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
350 StringRef getToken() const {
351 assert(Kind == Token && "Invalid access!");
352 return StringRef(Tok.Data, Tok.Length);
355 unsigned getReg() const {
356 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
360 const SmallVectorImpl<unsigned> &getRegList() const {
361 assert((Kind == RegisterList || Kind == DPRRegisterList ||
362 Kind == SPRRegisterList) && "Invalid access!");
366 const MCExpr *getImm() const {
367 assert(Kind == Immediate && "Invalid access!");
371 ARM_MB::MemBOpt getMemBarrierOpt() const {
372 assert(Kind == MemBarrierOpt && "Invalid access!");
376 ARM_PROC::IFlags getProcIFlags() const {
377 assert(Kind == ProcIFlags && "Invalid access!");
381 unsigned getMSRMask() const {
382 assert(Kind == MSRMask && "Invalid access!");
386 bool isCoprocNum() const { return Kind == CoprocNum; }
387 bool isCoprocReg() const { return Kind == CoprocReg; }
388 bool isCondCode() const { return Kind == CondCode; }
389 bool isCCOut() const { return Kind == CCOut; }
390 bool isImm() const { return Kind == Immediate; }
391 bool isImm0_255() const {
392 if (Kind != Immediate)
394 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
395 if (!CE) return false;
396 int64_t Value = CE->getValue();
397 return Value >= 0 && Value < 256;
399 bool isImm0_7() const {
400 if (Kind != Immediate)
402 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
403 if (!CE) return false;
404 int64_t Value = CE->getValue();
405 return Value >= 0 && Value < 8;
407 bool isImm0_15() const {
408 if (Kind != Immediate)
410 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
411 if (!CE) return false;
412 int64_t Value = CE->getValue();
413 return Value >= 0 && Value < 16;
415 bool isImm0_31() const {
416 if (Kind != Immediate)
418 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
419 if (!CE) return false;
420 int64_t Value = CE->getValue();
421 return Value >= 0 && Value < 32;
423 bool isImm1_16() const {
424 if (Kind != Immediate)
426 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
427 if (!CE) return false;
428 int64_t Value = CE->getValue();
429 return Value > 0 && Value < 17;
431 bool isImm1_32() const {
432 if (Kind != Immediate)
434 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
435 if (!CE) return false;
436 int64_t Value = CE->getValue();
437 return Value > 0 && Value < 33;
439 bool isImm0_65535() const {
440 if (Kind != Immediate)
442 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
443 if (!CE) return false;
444 int64_t Value = CE->getValue();
445 return Value >= 0 && Value < 65536;
447 bool isImm0_65535Expr() const {
448 if (Kind != Immediate)
450 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
451 // If it's not a constant expression, it'll generate a fixup and be
453 if (!CE) return true;
454 int64_t Value = CE->getValue();
455 return Value >= 0 && Value < 65536;
457 bool isImm24bit() const {
458 if (Kind != Immediate)
460 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
461 if (!CE) return false;
462 int64_t Value = CE->getValue();
463 return Value >= 0 && Value <= 0xffffff;
465 bool isPKHLSLImm() const {
466 if (Kind != Immediate)
468 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
469 if (!CE) return false;
470 int64_t Value = CE->getValue();
471 return Value >= 0 && Value < 32;
473 bool isPKHASRImm() const {
474 if (Kind != Immediate)
476 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
477 if (!CE) return false;
478 int64_t Value = CE->getValue();
479 return Value > 0 && Value <= 32;
481 bool isARMSOImm() const {
482 if (Kind != Immediate)
484 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
485 if (!CE) return false;
486 int64_t Value = CE->getValue();
487 return ARM_AM::getSOImmVal(Value) != -1;
489 bool isT2SOImm() const {
490 if (Kind != Immediate)
492 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
493 if (!CE) return false;
494 int64_t Value = CE->getValue();
495 return ARM_AM::getT2SOImmVal(Value) != -1;
497 bool isSetEndImm() const {
498 if (Kind != Immediate)
500 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
501 if (!CE) return false;
502 int64_t Value = CE->getValue();
503 return Value == 1 || Value == 0;
505 bool isReg() const { return Kind == Register; }
506 bool isRegList() const { return Kind == RegisterList; }
507 bool isDPRRegList() const { return Kind == DPRRegisterList; }
508 bool isSPRRegList() const { return Kind == SPRRegisterList; }
509 bool isToken() const { return Kind == Token; }
510 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
511 bool isMemory() const { return Kind == Memory; }
512 bool isShifterImm() const { return Kind == ShifterImmediate; }
513 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
514 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
515 bool isRotImm() const { return Kind == RotateImmediate; }
516 bool isBitfield() const { return Kind == BitfieldDescriptor; }
517 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
518 bool isPostIdxReg() const {
519 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
521 bool isMemNoOffset() const {
524 // No offset of any kind.
525 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
527 bool isAddrMode2() const {
530 // Check for register offset.
531 if (Mem.OffsetRegNum) return true;
532 // Immediate offset in range [-4095, 4095].
533 if (!Mem.OffsetImm) return true;
534 int64_t Val = Mem.OffsetImm->getValue();
535 return Val > -4096 && Val < 4096;
537 bool isAM2OffsetImm() const {
538 if (Kind != Immediate)
540 // Immediate offset in range [-4095, 4095].
541 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
542 if (!CE) return false;
543 int64_t Val = CE->getValue();
544 return Val > -4096 && Val < 4096;
546 bool isAddrMode3() const {
549 // No shifts are legal for AM3.
550 if (Mem.ShiftType != ARM_AM::no_shift) return false;
551 // Check for register offset.
552 if (Mem.OffsetRegNum) return true;
553 // Immediate offset in range [-255, 255].
554 if (!Mem.OffsetImm) return true;
555 int64_t Val = Mem.OffsetImm->getValue();
556 return Val > -256 && Val < 256;
558 bool isAM3Offset() const {
559 if (Kind != Immediate && Kind != PostIndexRegister)
561 if (Kind == PostIndexRegister)
562 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
563 // Immediate offset in range [-255, 255].
564 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
565 if (!CE) return false;
566 int64_t Val = CE->getValue();
567 // Special case, #-0 is INT32_MIN.
568 return (Val > -256 && Val < 256) || Val == INT32_MIN;
570 bool isAddrMode5() const {
573 // Check for register offset.
574 if (Mem.OffsetRegNum) return false;
575 // Immediate offset in range [-1020, 1020] and a multiple of 4.
576 if (!Mem.OffsetImm) return true;
577 int64_t Val = Mem.OffsetImm->getValue();
578 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
580 bool isMemRegOffset() const {
581 if (Kind != Memory || !Mem.OffsetRegNum)
585 bool isMemThumbRR() const {
586 // Thumb reg+reg addressing is simple. Just two registers, a base and
587 // an offset. No shifts, negations or any other complicating factors.
588 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
589 Mem.ShiftType != ARM_AM::no_shift)
593 bool isMemImm8Offset() const {
594 if (Kind != Memory || Mem.OffsetRegNum != 0)
596 // Immediate offset in range [-255, 255].
597 if (!Mem.OffsetImm) return true;
598 int64_t Val = Mem.OffsetImm->getValue();
599 return Val > -256 && Val < 256;
601 bool isMemImm12Offset() const {
602 // If we have an immediate that's not a constant, treat it as a label
603 // reference needing a fixup. If it is a constant, it's something else
605 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
608 if (Kind != Memory || Mem.OffsetRegNum != 0)
610 // Immediate offset in range [-4095, 4095].
611 if (!Mem.OffsetImm) return true;
612 int64_t Val = Mem.OffsetImm->getValue();
613 return Val > -4096 && Val < 4096;
615 bool isPostIdxImm8() const {
616 if (Kind != Immediate)
618 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
619 if (!CE) return false;
620 int64_t Val = CE->getValue();
621 return Val > -256 && Val < 256;
624 bool isMSRMask() const { return Kind == MSRMask; }
625 bool isProcIFlags() const { return Kind == ProcIFlags; }
627 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
628 // Add as immediates when possible. Null MCExpr = 0.
630 Inst.addOperand(MCOperand::CreateImm(0));
631 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
632 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
634 Inst.addOperand(MCOperand::CreateExpr(Expr));
637 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
638 assert(N == 2 && "Invalid number of operands!");
639 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
640 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
641 Inst.addOperand(MCOperand::CreateReg(RegNum));
644 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
645 assert(N == 1 && "Invalid number of operands!");
646 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
649 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
650 assert(N == 1 && "Invalid number of operands!");
651 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
654 void addCCOutOperands(MCInst &Inst, unsigned N) const {
655 assert(N == 1 && "Invalid number of operands!");
656 Inst.addOperand(MCOperand::CreateReg(getReg()));
659 void addRegOperands(MCInst &Inst, unsigned N) const {
660 assert(N == 1 && "Invalid number of operands!");
661 Inst.addOperand(MCOperand::CreateReg(getReg()));
664 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
665 assert(N == 3 && "Invalid number of operands!");
666 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
667 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
668 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
669 Inst.addOperand(MCOperand::CreateImm(
670 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
673 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
674 assert(N == 2 && "Invalid number of operands!");
675 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
676 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
677 Inst.addOperand(MCOperand::CreateImm(
678 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
682 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
683 assert(N == 1 && "Invalid number of operands!");
684 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
688 void addRegListOperands(MCInst &Inst, unsigned N) const {
689 assert(N == 1 && "Invalid number of operands!");
690 const SmallVectorImpl<unsigned> &RegList = getRegList();
691 for (SmallVectorImpl<unsigned>::const_iterator
692 I = RegList.begin(), E = RegList.end(); I != E; ++I)
693 Inst.addOperand(MCOperand::CreateReg(*I));
696 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
697 addRegListOperands(Inst, N);
700 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
701 addRegListOperands(Inst, N);
704 void addRotImmOperands(MCInst &Inst, unsigned N) const {
705 assert(N == 1 && "Invalid number of operands!");
706 // Encoded as val>>3. The printer handles display as 8, 16, 24.
707 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
710 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
711 assert(N == 1 && "Invalid number of operands!");
712 // Munge the lsb/width into a bitfield mask.
713 unsigned lsb = Bitfield.LSB;
714 unsigned width = Bitfield.Width;
715 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
716 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
717 (32 - (lsb + width)));
718 Inst.addOperand(MCOperand::CreateImm(Mask));
721 void addImmOperands(MCInst &Inst, unsigned N) const {
722 assert(N == 1 && "Invalid number of operands!");
723 addExpr(Inst, getImm());
726 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
727 assert(N == 1 && "Invalid number of operands!");
728 addExpr(Inst, getImm());
731 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
732 assert(N == 1 && "Invalid number of operands!");
733 addExpr(Inst, getImm());
736 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
737 assert(N == 1 && "Invalid number of operands!");
738 addExpr(Inst, getImm());
741 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
742 assert(N == 1 && "Invalid number of operands!");
743 addExpr(Inst, getImm());
746 void addImm1_16Operands(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 addImm1_32Operands(MCInst &Inst, unsigned N) const {
755 assert(N == 1 && "Invalid number of operands!");
756 // The constant encodes as the immediate-1, and we store in the instruction
757 // the bits as encoded, so subtract off one here.
758 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
759 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
762 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
763 assert(N == 1 && "Invalid number of operands!");
764 addExpr(Inst, getImm());
767 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
768 assert(N == 1 && "Invalid number of operands!");
769 addExpr(Inst, getImm());
772 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
773 assert(N == 1 && "Invalid number of operands!");
774 addExpr(Inst, getImm());
777 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
778 assert(N == 1 && "Invalid number of operands!");
779 addExpr(Inst, getImm());
782 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
783 assert(N == 1 && "Invalid number of operands!");
784 // An ASR value of 32 encodes as 0, so that's how we want to add it to
785 // the instruction as well.
786 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
787 int Val = CE->getValue();
788 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
791 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
792 assert(N == 1 && "Invalid number of operands!");
793 addExpr(Inst, getImm());
796 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
797 assert(N == 1 && "Invalid number of operands!");
798 addExpr(Inst, getImm());
801 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
802 assert(N == 1 && "Invalid number of operands!");
803 addExpr(Inst, getImm());
806 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
807 assert(N == 1 && "Invalid number of operands!");
808 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
811 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
812 assert(N == 1 && "Invalid number of operands!");
813 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
816 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
817 assert(N == 3 && "Invalid number of operands!");
818 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
819 if (!Mem.OffsetRegNum) {
820 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
821 // Special case for #-0
822 if (Val == INT32_MIN) Val = 0;
823 if (Val < 0) Val = -Val;
824 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
826 // For register offset, we encode the shift type and negation flag
828 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
831 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
832 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
833 Inst.addOperand(MCOperand::CreateImm(Val));
836 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
837 assert(N == 2 && "Invalid number of operands!");
838 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
839 assert(CE && "non-constant AM2OffsetImm operand!");
840 int32_t Val = CE->getValue();
841 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
842 // Special case for #-0
843 if (Val == INT32_MIN) Val = 0;
844 if (Val < 0) Val = -Val;
845 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
846 Inst.addOperand(MCOperand::CreateReg(0));
847 Inst.addOperand(MCOperand::CreateImm(Val));
850 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
851 assert(N == 3 && "Invalid number of operands!");
852 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
853 if (!Mem.OffsetRegNum) {
854 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
855 // Special case for #-0
856 if (Val == INT32_MIN) Val = 0;
857 if (Val < 0) Val = -Val;
858 Val = ARM_AM::getAM3Opc(AddSub, Val);
860 // For register offset, we encode the shift type and negation flag
862 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
864 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
865 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
866 Inst.addOperand(MCOperand::CreateImm(Val));
869 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
870 assert(N == 2 && "Invalid number of operands!");
871 if (Kind == PostIndexRegister) {
873 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
874 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
875 Inst.addOperand(MCOperand::CreateImm(Val));
880 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
881 int32_t Val = CE->getValue();
882 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
883 // Special case for #-0
884 if (Val == INT32_MIN) Val = 0;
885 if (Val < 0) Val = -Val;
886 Val = ARM_AM::getAM3Opc(AddSub, Val);
887 Inst.addOperand(MCOperand::CreateReg(0));
888 Inst.addOperand(MCOperand::CreateImm(Val));
891 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
892 assert(N == 2 && "Invalid number of operands!");
893 // The lower two bits are always zero and as such are not encoded.
894 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
895 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
896 // Special case for #-0
897 if (Val == INT32_MIN) Val = 0;
898 if (Val < 0) Val = -Val;
899 Val = ARM_AM::getAM5Opc(AddSub, Val);
900 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
901 Inst.addOperand(MCOperand::CreateImm(Val));
904 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
905 assert(N == 2 && "Invalid number of operands!");
906 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
907 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
908 Inst.addOperand(MCOperand::CreateImm(Val));
911 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
912 assert(N == 2 && "Invalid number of operands!");
913 // If this is an immediate, it's a label reference.
914 if (Kind == Immediate) {
915 addExpr(Inst, getImm());
916 Inst.addOperand(MCOperand::CreateImm(0));
920 // Otherwise, it's a normal memory reg+offset.
921 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
922 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
923 Inst.addOperand(MCOperand::CreateImm(Val));
926 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
927 assert(N == 3 && "Invalid number of operands!");
928 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
929 Mem.ShiftImm, Mem.ShiftType);
930 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
931 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
932 Inst.addOperand(MCOperand::CreateImm(Val));
935 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
936 assert(N == 2 && "Invalid number of operands!");
937 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
938 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
941 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
942 assert(N == 1 && "Invalid number of operands!");
943 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
944 assert(CE && "non-constant post-idx-imm8 operand!");
945 int Imm = CE->getValue();
946 bool isAdd = Imm >= 0;
947 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
948 Inst.addOperand(MCOperand::CreateImm(Imm));
951 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
952 assert(N == 2 && "Invalid number of operands!");
953 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
954 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
957 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
958 assert(N == 2 && "Invalid number of operands!");
959 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
960 // The sign, shift type, and shift amount are encoded in a single operand
961 // using the AM2 encoding helpers.
962 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
963 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
965 Inst.addOperand(MCOperand::CreateImm(Imm));
968 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
969 assert(N == 1 && "Invalid number of operands!");
970 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
973 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
974 assert(N == 1 && "Invalid number of operands!");
975 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
978 virtual void print(raw_ostream &OS) const;
980 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
981 ARMOperand *Op = new ARMOperand(CondCode);
988 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
989 ARMOperand *Op = new ARMOperand(CoprocNum);
990 Op->Cop.Val = CopVal;
996 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
997 ARMOperand *Op = new ARMOperand(CoprocReg);
998 Op->Cop.Val = CopVal;
1004 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1005 ARMOperand *Op = new ARMOperand(CCOut);
1006 Op->Reg.RegNum = RegNum;
1012 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1013 ARMOperand *Op = new ARMOperand(Token);
1014 Op->Tok.Data = Str.data();
1015 Op->Tok.Length = Str.size();
1021 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1022 ARMOperand *Op = new ARMOperand(Register);
1023 Op->Reg.RegNum = RegNum;
1029 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1034 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1035 Op->RegShiftedReg.ShiftTy = ShTy;
1036 Op->RegShiftedReg.SrcReg = SrcReg;
1037 Op->RegShiftedReg.ShiftReg = ShiftReg;
1038 Op->RegShiftedReg.ShiftImm = ShiftImm;
1044 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1048 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1049 Op->RegShiftedImm.ShiftTy = ShTy;
1050 Op->RegShiftedImm.SrcReg = SrcReg;
1051 Op->RegShiftedImm.ShiftImm = ShiftImm;
1057 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1059 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1060 Op->ShifterImm.isASR = isASR;
1061 Op->ShifterImm.Imm = Imm;
1067 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1068 ARMOperand *Op = new ARMOperand(RotateImmediate);
1069 Op->RotImm.Imm = Imm;
1075 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1077 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1078 Op->Bitfield.LSB = LSB;
1079 Op->Bitfield.Width = Width;
1086 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1087 SMLoc StartLoc, SMLoc EndLoc) {
1088 KindTy Kind = RegisterList;
1090 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1091 contains(Regs.front().first))
1092 Kind = DPRRegisterList;
1093 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1094 contains(Regs.front().first))
1095 Kind = SPRRegisterList;
1097 ARMOperand *Op = new ARMOperand(Kind);
1098 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1099 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1100 Op->Registers.push_back(I->first);
1101 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1102 Op->StartLoc = StartLoc;
1103 Op->EndLoc = EndLoc;
1107 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1108 ARMOperand *Op = new ARMOperand(Immediate);
1115 static ARMOperand *CreateMem(unsigned BaseRegNum,
1116 const MCConstantExpr *OffsetImm,
1117 unsigned OffsetRegNum,
1118 ARM_AM::ShiftOpc ShiftType,
1122 ARMOperand *Op = new ARMOperand(Memory);
1123 Op->Mem.BaseRegNum = BaseRegNum;
1124 Op->Mem.OffsetImm = OffsetImm;
1125 Op->Mem.OffsetRegNum = OffsetRegNum;
1126 Op->Mem.ShiftType = ShiftType;
1127 Op->Mem.ShiftImm = ShiftImm;
1128 Op->Mem.isNegative = isNegative;
1134 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1135 ARM_AM::ShiftOpc ShiftTy,
1138 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1139 Op->PostIdxReg.RegNum = RegNum;
1140 Op->PostIdxReg.isAdd = isAdd;
1141 Op->PostIdxReg.ShiftTy = ShiftTy;
1142 Op->PostIdxReg.ShiftImm = ShiftImm;
1148 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1149 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1150 Op->MBOpt.Val = Opt;
1156 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1157 ARMOperand *Op = new ARMOperand(ProcIFlags);
1158 Op->IFlags.Val = IFlags;
1164 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1165 ARMOperand *Op = new ARMOperand(MSRMask);
1166 Op->MMask.Val = MMask;
1173 } // end anonymous namespace.
1175 void ARMOperand::print(raw_ostream &OS) const {
1178 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1181 OS << "<ccout " << getReg() << ">";
1184 OS << "<coprocessor number: " << getCoproc() << ">";
1187 OS << "<coprocessor register: " << getCoproc() << ">";
1190 OS << "<mask: " << getMSRMask() << ">";
1193 getImm()->print(OS);
1196 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1200 << " base:" << Mem.BaseRegNum;
1203 case PostIndexRegister:
1204 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1205 << PostIdxReg.RegNum;
1206 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1207 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1208 << PostIdxReg.ShiftImm;
1212 OS << "<ARM_PROC::";
1213 unsigned IFlags = getProcIFlags();
1214 for (int i=2; i >= 0; --i)
1215 if (IFlags & (1 << i))
1216 OS << ARM_PROC::IFlagsToString(1 << i);
1221 OS << "<register " << getReg() << ">";
1223 case ShifterImmediate:
1224 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1225 << " #" << ShifterImm.Imm << ">";
1227 case ShiftedRegister:
1228 OS << "<so_reg_reg "
1229 << RegShiftedReg.SrcReg
1230 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1231 << ", " << RegShiftedReg.ShiftReg << ", "
1232 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1235 case ShiftedImmediate:
1236 OS << "<so_reg_imm "
1237 << RegShiftedImm.SrcReg
1238 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1239 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1242 case RotateImmediate:
1243 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1245 case BitfieldDescriptor:
1246 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1247 << ", width: " << Bitfield.Width << ">";
1250 case DPRRegisterList:
1251 case SPRRegisterList: {
1252 OS << "<register_list ";
1254 const SmallVectorImpl<unsigned> &RegList = getRegList();
1255 for (SmallVectorImpl<unsigned>::const_iterator
1256 I = RegList.begin(), E = RegList.end(); I != E; ) {
1258 if (++I < E) OS << ", ";
1265 OS << "'" << getToken() << "'";
1270 /// @name Auto-generated Match Functions
1273 static unsigned MatchRegisterName(StringRef Name);
1277 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1278 SMLoc &StartLoc, SMLoc &EndLoc) {
1279 RegNo = tryParseRegister();
1281 return (RegNo == (unsigned)-1);
1284 /// Try to parse a register name. The token must be an Identifier when called,
1285 /// and if it is a register name the token is eaten and the register number is
1286 /// returned. Otherwise return -1.
1288 int ARMAsmParser::tryParseRegister() {
1289 const AsmToken &Tok = Parser.getTok();
1290 if (Tok.isNot(AsmToken::Identifier)) return -1;
1292 // FIXME: Validate register for the current architecture; we have to do
1293 // validation later, so maybe there is no need for this here.
1294 std::string upperCase = Tok.getString().str();
1295 std::string lowerCase = LowercaseString(upperCase);
1296 unsigned RegNum = MatchRegisterName(lowerCase);
1298 RegNum = StringSwitch<unsigned>(lowerCase)
1299 .Case("r13", ARM::SP)
1300 .Case("r14", ARM::LR)
1301 .Case("r15", ARM::PC)
1302 .Case("ip", ARM::R12)
1305 if (!RegNum) return -1;
1307 Parser.Lex(); // Eat identifier token.
1311 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1312 // If a recoverable error occurs, return 1. If an irrecoverable error
1313 // occurs, return -1. An irrecoverable error is one where tokens have been
1314 // consumed in the process of trying to parse the shifter (i.e., when it is
1315 // indeed a shifter operand, but malformed).
1316 int ARMAsmParser::tryParseShiftRegister(
1317 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1318 SMLoc S = Parser.getTok().getLoc();
1319 const AsmToken &Tok = Parser.getTok();
1320 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1322 std::string upperCase = Tok.getString().str();
1323 std::string lowerCase = LowercaseString(upperCase);
1324 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1325 .Case("lsl", ARM_AM::lsl)
1326 .Case("lsr", ARM_AM::lsr)
1327 .Case("asr", ARM_AM::asr)
1328 .Case("ror", ARM_AM::ror)
1329 .Case("rrx", ARM_AM::rrx)
1330 .Default(ARM_AM::no_shift);
1332 if (ShiftTy == ARM_AM::no_shift)
1335 Parser.Lex(); // Eat the operator.
1337 // The source register for the shift has already been added to the
1338 // operand list, so we need to pop it off and combine it into the shifted
1339 // register operand instead.
1340 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1341 if (!PrevOp->isReg())
1342 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1343 int SrcReg = PrevOp->getReg();
1346 if (ShiftTy == ARM_AM::rrx) {
1347 // RRX Doesn't have an explicit shift amount. The encoder expects
1348 // the shift register to be the same as the source register. Seems odd,
1352 // Figure out if this is shifted by a constant or a register (for non-RRX).
1353 if (Parser.getTok().is(AsmToken::Hash)) {
1354 Parser.Lex(); // Eat hash.
1355 SMLoc ImmLoc = Parser.getTok().getLoc();
1356 const MCExpr *ShiftExpr = 0;
1357 if (getParser().ParseExpression(ShiftExpr)) {
1358 Error(ImmLoc, "invalid immediate shift value");
1361 // The expression must be evaluatable as an immediate.
1362 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1364 Error(ImmLoc, "invalid immediate shift value");
1367 // Range check the immediate.
1368 // lsl, ror: 0 <= imm <= 31
1369 // lsr, asr: 0 <= imm <= 32
1370 Imm = CE->getValue();
1372 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1373 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1374 Error(ImmLoc, "immediate shift value out of range");
1377 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1378 ShiftReg = tryParseRegister();
1379 SMLoc L = Parser.getTok().getLoc();
1380 if (ShiftReg == -1) {
1381 Error (L, "expected immediate or register in shift operand");
1385 Error (Parser.getTok().getLoc(),
1386 "expected immediate or register in shift operand");
1391 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1392 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1394 S, Parser.getTok().getLoc()));
1396 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1397 S, Parser.getTok().getLoc()));
1403 /// Try to parse a register name. The token must be an Identifier when called.
1404 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1405 /// if there is a "writeback". 'true' if it's not a register.
1407 /// TODO this is likely to change to allow different register types and or to
1408 /// parse for a specific register type.
1410 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1411 SMLoc S = Parser.getTok().getLoc();
1412 int RegNo = tryParseRegister();
1416 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1418 const AsmToken &ExclaimTok = Parser.getTok();
1419 if (ExclaimTok.is(AsmToken::Exclaim)) {
1420 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1421 ExclaimTok.getLoc()));
1422 Parser.Lex(); // Eat exclaim token
1428 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1429 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1431 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1432 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1434 switch (Name.size()) {
1437 if (Name[0] != CoprocOp)
1454 if (Name[0] != CoprocOp || Name[1] != '1')
1458 case '0': return 10;
1459 case '1': return 11;
1460 case '2': return 12;
1461 case '3': return 13;
1462 case '4': return 14;
1463 case '5': return 15;
1471 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1472 /// token must be an Identifier when called, and if it is a coprocessor
1473 /// number, the token is eaten and the operand is added to the operand list.
1474 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1475 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1476 SMLoc S = Parser.getTok().getLoc();
1477 const AsmToken &Tok = Parser.getTok();
1478 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1480 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1482 return MatchOperand_NoMatch;
1484 Parser.Lex(); // Eat identifier token.
1485 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1486 return MatchOperand_Success;
1489 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1490 /// token must be an Identifier when called, and if it is a coprocessor
1491 /// number, the token is eaten and the operand is added to the operand list.
1492 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1493 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1494 SMLoc S = Parser.getTok().getLoc();
1495 const AsmToken &Tok = Parser.getTok();
1496 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1498 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1500 return MatchOperand_NoMatch;
1502 Parser.Lex(); // Eat identifier token.
1503 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1504 return MatchOperand_Success;
1507 /// Parse a register list, return it if successful else return null. The first
1508 /// token must be a '{' when called.
1510 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1511 assert(Parser.getTok().is(AsmToken::LCurly) &&
1512 "Token is not a Left Curly Brace");
1513 SMLoc S = Parser.getTok().getLoc();
1515 // Read the rest of the registers in the list.
1516 unsigned PrevRegNum = 0;
1517 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1520 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1521 Parser.Lex(); // Eat non-identifier token.
1523 const AsmToken &RegTok = Parser.getTok();
1524 SMLoc RegLoc = RegTok.getLoc();
1525 if (RegTok.isNot(AsmToken::Identifier)) {
1526 Error(RegLoc, "register expected");
1530 int RegNum = tryParseRegister();
1532 Error(RegLoc, "register expected");
1537 int Reg = PrevRegNum;
1540 Registers.push_back(std::make_pair(Reg, RegLoc));
1541 } while (Reg != RegNum);
1543 Registers.push_back(std::make_pair(RegNum, RegLoc));
1546 PrevRegNum = RegNum;
1547 } while (Parser.getTok().is(AsmToken::Comma) ||
1548 Parser.getTok().is(AsmToken::Minus));
1550 // Process the right curly brace of the list.
1551 const AsmToken &RCurlyTok = Parser.getTok();
1552 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1553 Error(RCurlyTok.getLoc(), "'}' expected");
1557 SMLoc E = RCurlyTok.getLoc();
1558 Parser.Lex(); // Eat right curly brace token.
1560 // Verify the register list.
1561 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1562 RI = Registers.begin(), RE = Registers.end();
1564 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1565 bool EmittedWarning = false;
1567 DenseMap<unsigned, bool> RegMap;
1568 RegMap[HighRegNum] = true;
1570 for (++RI; RI != RE; ++RI) {
1571 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1572 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1575 Error(RegInfo.second, "register duplicated in register list");
1579 if (!EmittedWarning && Reg < HighRegNum)
1580 Warning(RegInfo.second,
1581 "register not in ascending order in register list");
1584 HighRegNum = std::max(Reg, HighRegNum);
1587 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1591 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1592 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1593 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1594 SMLoc S = Parser.getTok().getLoc();
1595 const AsmToken &Tok = Parser.getTok();
1596 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1597 StringRef OptStr = Tok.getString();
1599 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1600 .Case("sy", ARM_MB::SY)
1601 .Case("st", ARM_MB::ST)
1602 .Case("sh", ARM_MB::ISH)
1603 .Case("ish", ARM_MB::ISH)
1604 .Case("shst", ARM_MB::ISHST)
1605 .Case("ishst", ARM_MB::ISHST)
1606 .Case("nsh", ARM_MB::NSH)
1607 .Case("un", ARM_MB::NSH)
1608 .Case("nshst", ARM_MB::NSHST)
1609 .Case("unst", ARM_MB::NSHST)
1610 .Case("osh", ARM_MB::OSH)
1611 .Case("oshst", ARM_MB::OSHST)
1615 return MatchOperand_NoMatch;
1617 Parser.Lex(); // Eat identifier token.
1618 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1619 return MatchOperand_Success;
1622 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1623 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1624 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1625 SMLoc S = Parser.getTok().getLoc();
1626 const AsmToken &Tok = Parser.getTok();
1627 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1628 StringRef IFlagsStr = Tok.getString();
1630 unsigned IFlags = 0;
1631 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1632 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1633 .Case("a", ARM_PROC::A)
1634 .Case("i", ARM_PROC::I)
1635 .Case("f", ARM_PROC::F)
1638 // If some specific iflag is already set, it means that some letter is
1639 // present more than once, this is not acceptable.
1640 if (Flag == ~0U || (IFlags & Flag))
1641 return MatchOperand_NoMatch;
1646 Parser.Lex(); // Eat identifier token.
1647 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1648 return MatchOperand_Success;
1651 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1652 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1653 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1654 SMLoc S = Parser.getTok().getLoc();
1655 const AsmToken &Tok = Parser.getTok();
1656 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1657 StringRef Mask = Tok.getString();
1659 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1660 size_t Start = 0, Next = Mask.find('_');
1661 StringRef Flags = "";
1662 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1663 if (Next != StringRef::npos)
1664 Flags = Mask.slice(Next+1, Mask.size());
1666 // FlagsVal contains the complete mask:
1668 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1669 unsigned FlagsVal = 0;
1671 if (SpecReg == "apsr") {
1672 FlagsVal = StringSwitch<unsigned>(Flags)
1673 .Case("nzcvq", 0x8) // same as CPSR_f
1674 .Case("g", 0x4) // same as CPSR_s
1675 .Case("nzcvqg", 0xc) // same as CPSR_fs
1678 if (FlagsVal == ~0U) {
1680 return MatchOperand_NoMatch;
1682 FlagsVal = 0; // No flag
1684 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1685 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1687 for (int i = 0, e = Flags.size(); i != e; ++i) {
1688 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1695 // If some specific flag is already set, it means that some letter is
1696 // present more than once, this is not acceptable.
1697 if (FlagsVal == ~0U || (FlagsVal & Flag))
1698 return MatchOperand_NoMatch;
1701 } else // No match for special register.
1702 return MatchOperand_NoMatch;
1704 // Special register without flags are equivalent to "fc" flags.
1708 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1709 if (SpecReg == "spsr")
1712 Parser.Lex(); // Eat identifier token.
1713 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1714 return MatchOperand_Success;
1717 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1718 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1719 int Low, int High) {
1720 const AsmToken &Tok = Parser.getTok();
1721 if (Tok.isNot(AsmToken::Identifier)) {
1722 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1723 return MatchOperand_ParseFail;
1725 StringRef ShiftName = Tok.getString();
1726 std::string LowerOp = LowercaseString(Op);
1727 std::string UpperOp = UppercaseString(Op);
1728 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1729 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1730 return MatchOperand_ParseFail;
1732 Parser.Lex(); // Eat shift type token.
1734 // There must be a '#' and a shift amount.
1735 if (Parser.getTok().isNot(AsmToken::Hash)) {
1736 Error(Parser.getTok().getLoc(), "'#' expected");
1737 return MatchOperand_ParseFail;
1739 Parser.Lex(); // Eat hash token.
1741 const MCExpr *ShiftAmount;
1742 SMLoc Loc = Parser.getTok().getLoc();
1743 if (getParser().ParseExpression(ShiftAmount)) {
1744 Error(Loc, "illegal expression");
1745 return MatchOperand_ParseFail;
1747 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1749 Error(Loc, "constant expression expected");
1750 return MatchOperand_ParseFail;
1752 int Val = CE->getValue();
1753 if (Val < Low || Val > High) {
1754 Error(Loc, "immediate value out of range");
1755 return MatchOperand_ParseFail;
1758 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1760 return MatchOperand_Success;
1763 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1764 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1765 const AsmToken &Tok = Parser.getTok();
1766 SMLoc S = Tok.getLoc();
1767 if (Tok.isNot(AsmToken::Identifier)) {
1768 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1769 return MatchOperand_ParseFail;
1771 int Val = StringSwitch<int>(Tok.getString())
1775 Parser.Lex(); // Eat the token.
1778 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1779 return MatchOperand_ParseFail;
1781 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1783 S, Parser.getTok().getLoc()));
1784 return MatchOperand_Success;
1787 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1788 /// instructions. Legal values are:
1789 /// lsl #n 'n' in [0,31]
1790 /// asr #n 'n' in [1,32]
1791 /// n == 32 encoded as n == 0.
1792 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1793 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1794 const AsmToken &Tok = Parser.getTok();
1795 SMLoc S = Tok.getLoc();
1796 if (Tok.isNot(AsmToken::Identifier)) {
1797 Error(S, "shift operator 'asr' or 'lsl' expected");
1798 return MatchOperand_ParseFail;
1800 StringRef ShiftName = Tok.getString();
1802 if (ShiftName == "lsl" || ShiftName == "LSL")
1804 else if (ShiftName == "asr" || ShiftName == "ASR")
1807 Error(S, "shift operator 'asr' or 'lsl' expected");
1808 return MatchOperand_ParseFail;
1810 Parser.Lex(); // Eat the operator.
1812 // A '#' and a shift amount.
1813 if (Parser.getTok().isNot(AsmToken::Hash)) {
1814 Error(Parser.getTok().getLoc(), "'#' expected");
1815 return MatchOperand_ParseFail;
1817 Parser.Lex(); // Eat hash token.
1819 const MCExpr *ShiftAmount;
1820 SMLoc E = Parser.getTok().getLoc();
1821 if (getParser().ParseExpression(ShiftAmount)) {
1822 Error(E, "malformed shift expression");
1823 return MatchOperand_ParseFail;
1825 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1827 Error(E, "shift amount must be an immediate");
1828 return MatchOperand_ParseFail;
1831 int64_t Val = CE->getValue();
1833 // Shift amount must be in [1,32]
1834 if (Val < 1 || Val > 32) {
1835 Error(E, "'asr' shift amount must be in range [1,32]");
1836 return MatchOperand_ParseFail;
1838 // asr #32 encoded as asr #0.
1839 if (Val == 32) Val = 0;
1841 // Shift amount must be in [1,32]
1842 if (Val < 0 || Val > 31) {
1843 Error(E, "'lsr' shift amount must be in range [0,31]");
1844 return MatchOperand_ParseFail;
1848 E = Parser.getTok().getLoc();
1849 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1851 return MatchOperand_Success;
1854 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1855 /// of instructions. Legal values are:
1856 /// ror #n 'n' in {0, 8, 16, 24}
1857 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1858 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1859 const AsmToken &Tok = Parser.getTok();
1860 SMLoc S = Tok.getLoc();
1861 if (Tok.isNot(AsmToken::Identifier)) {
1862 Error(S, "rotate operator 'ror' expected");
1863 return MatchOperand_ParseFail;
1865 StringRef ShiftName = Tok.getString();
1866 if (ShiftName != "ror" && ShiftName != "ROR") {
1867 Error(S, "rotate operator 'ror' expected");
1868 return MatchOperand_ParseFail;
1870 Parser.Lex(); // Eat the operator.
1872 // A '#' and a rotate amount.
1873 if (Parser.getTok().isNot(AsmToken::Hash)) {
1874 Error(Parser.getTok().getLoc(), "'#' expected");
1875 return MatchOperand_ParseFail;
1877 Parser.Lex(); // Eat hash token.
1879 const MCExpr *ShiftAmount;
1880 SMLoc E = Parser.getTok().getLoc();
1881 if (getParser().ParseExpression(ShiftAmount)) {
1882 Error(E, "malformed rotate expression");
1883 return MatchOperand_ParseFail;
1885 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1887 Error(E, "rotate amount must be an immediate");
1888 return MatchOperand_ParseFail;
1891 int64_t Val = CE->getValue();
1892 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1893 // normally, zero is represented in asm by omitting the rotate operand
1895 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1896 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1897 return MatchOperand_ParseFail;
1900 E = Parser.getTok().getLoc();
1901 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1903 return MatchOperand_Success;
1906 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1907 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1908 SMLoc S = Parser.getTok().getLoc();
1909 // The bitfield descriptor is really two operands, the LSB and the width.
1910 if (Parser.getTok().isNot(AsmToken::Hash)) {
1911 Error(Parser.getTok().getLoc(), "'#' expected");
1912 return MatchOperand_ParseFail;
1914 Parser.Lex(); // Eat hash token.
1916 const MCExpr *LSBExpr;
1917 SMLoc E = Parser.getTok().getLoc();
1918 if (getParser().ParseExpression(LSBExpr)) {
1919 Error(E, "malformed immediate expression");
1920 return MatchOperand_ParseFail;
1922 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
1924 Error(E, "'lsb' operand must be an immediate");
1925 return MatchOperand_ParseFail;
1928 int64_t LSB = CE->getValue();
1929 // The LSB must be in the range [0,31]
1930 if (LSB < 0 || LSB > 31) {
1931 Error(E, "'lsb' operand must be in the range [0,31]");
1932 return MatchOperand_ParseFail;
1934 E = Parser.getTok().getLoc();
1936 // Expect another immediate operand.
1937 if (Parser.getTok().isNot(AsmToken::Comma)) {
1938 Error(Parser.getTok().getLoc(), "too few operands");
1939 return MatchOperand_ParseFail;
1941 Parser.Lex(); // Eat hash token.
1942 if (Parser.getTok().isNot(AsmToken::Hash)) {
1943 Error(Parser.getTok().getLoc(), "'#' expected");
1944 return MatchOperand_ParseFail;
1946 Parser.Lex(); // Eat hash token.
1948 const MCExpr *WidthExpr;
1949 if (getParser().ParseExpression(WidthExpr)) {
1950 Error(E, "malformed immediate expression");
1951 return MatchOperand_ParseFail;
1953 CE = dyn_cast<MCConstantExpr>(WidthExpr);
1955 Error(E, "'width' operand must be an immediate");
1956 return MatchOperand_ParseFail;
1959 int64_t Width = CE->getValue();
1960 // The LSB must be in the range [1,32-lsb]
1961 if (Width < 1 || Width > 32 - LSB) {
1962 Error(E, "'width' operand must be in the range [1,32-lsb]");
1963 return MatchOperand_ParseFail;
1965 E = Parser.getTok().getLoc();
1967 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
1969 return MatchOperand_Success;
1972 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1973 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1974 // Check for a post-index addressing register operand. Specifically:
1975 // postidx_reg := '+' register {, shift}
1976 // | '-' register {, shift}
1977 // | register {, shift}
1979 // This method must return MatchOperand_NoMatch without consuming any tokens
1980 // in the case where there is no match, as other alternatives take other
1982 AsmToken Tok = Parser.getTok();
1983 SMLoc S = Tok.getLoc();
1984 bool haveEaten = false;
1987 if (Tok.is(AsmToken::Plus)) {
1988 Parser.Lex(); // Eat the '+' token.
1990 } else if (Tok.is(AsmToken::Minus)) {
1991 Parser.Lex(); // Eat the '-' token.
1995 if (Parser.getTok().is(AsmToken::Identifier))
1996 Reg = tryParseRegister();
1999 return MatchOperand_NoMatch;
2000 Error(Parser.getTok().getLoc(), "register expected");
2001 return MatchOperand_ParseFail;
2003 SMLoc E = Parser.getTok().getLoc();
2005 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2006 unsigned ShiftImm = 0;
2007 if (Parser.getTok().is(AsmToken::Comma)) {
2008 Parser.Lex(); // Eat the ','.
2009 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2010 return MatchOperand_ParseFail;
2013 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2016 return MatchOperand_Success;
2019 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2020 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2021 // Check for a post-index addressing register operand. Specifically:
2022 // am3offset := '+' register
2029 // This method must return MatchOperand_NoMatch without consuming any tokens
2030 // in the case where there is no match, as other alternatives take other
2032 AsmToken Tok = Parser.getTok();
2033 SMLoc S = Tok.getLoc();
2035 // Do immediates first, as we always parse those if we have a '#'.
2036 if (Parser.getTok().is(AsmToken::Hash)) {
2037 Parser.Lex(); // Eat the '#'.
2038 // Explicitly look for a '-', as we need to encode negative zero
2040 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2041 const MCExpr *Offset;
2042 if (getParser().ParseExpression(Offset))
2043 return MatchOperand_ParseFail;
2044 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2046 Error(S, "constant expression expected");
2047 return MatchOperand_ParseFail;
2049 SMLoc E = Tok.getLoc();
2050 // Negative zero is encoded as the flag value INT32_MIN.
2051 int32_t Val = CE->getValue();
2052 if (isNegative && Val == 0)
2056 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2058 return MatchOperand_Success;
2062 bool haveEaten = false;
2065 if (Tok.is(AsmToken::Plus)) {
2066 Parser.Lex(); // Eat the '+' token.
2068 } else if (Tok.is(AsmToken::Minus)) {
2069 Parser.Lex(); // Eat the '-' token.
2073 if (Parser.getTok().is(AsmToken::Identifier))
2074 Reg = tryParseRegister();
2077 return MatchOperand_NoMatch;
2078 Error(Parser.getTok().getLoc(), "register expected");
2079 return MatchOperand_ParseFail;
2081 SMLoc E = Parser.getTok().getLoc();
2083 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2086 return MatchOperand_Success;
2089 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2090 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2091 /// when they refer multiple MIOperands inside a single one.
2093 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2094 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2095 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2097 // Create a writeback register dummy placeholder.
2098 Inst.addOperand(MCOperand::CreateImm(0));
2100 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2101 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2105 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2106 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2107 /// when they refer multiple MIOperands inside a single one.
2109 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2110 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2111 // Create a writeback register dummy placeholder.
2112 Inst.addOperand(MCOperand::CreateImm(0));
2113 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2114 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2115 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2119 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2120 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2121 /// when they refer multiple MIOperands inside a single one.
2123 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2124 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2125 // Create a writeback register dummy placeholder.
2126 Inst.addOperand(MCOperand::CreateImm(0));
2127 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2128 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2129 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2133 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2134 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2135 /// when they refer multiple MIOperands inside a single one.
2137 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2138 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2140 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2141 // Create a writeback register dummy placeholder.
2142 Inst.addOperand(MCOperand::CreateImm(0));
2144 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2146 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2148 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2152 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2153 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2154 /// when they refer multiple MIOperands inside a single one.
2156 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2157 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2159 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2160 // Create a writeback register dummy placeholder.
2161 Inst.addOperand(MCOperand::CreateImm(0));
2163 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2165 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2167 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2171 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2172 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2173 /// when they refer multiple MIOperands inside a single one.
2175 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2176 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2177 // Create a writeback register dummy placeholder.
2178 Inst.addOperand(MCOperand::CreateImm(0));
2180 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2182 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2184 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2186 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2190 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2191 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2192 /// when they refer multiple MIOperands inside a single one.
2194 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2195 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2196 // Create a writeback register dummy placeholder.
2197 Inst.addOperand(MCOperand::CreateImm(0));
2199 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2201 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2203 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2205 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2209 /// cvtLdrdPre - Convert parsed operands to MCInst.
2210 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2211 /// when they refer multiple MIOperands inside a single one.
2213 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2214 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2216 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2217 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2218 // Create a writeback register dummy placeholder.
2219 Inst.addOperand(MCOperand::CreateImm(0));
2221 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2223 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2227 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2228 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2229 /// when they refer multiple MIOperands inside a single one.
2231 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2232 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2233 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2234 // Create a writeback register dummy placeholder.
2235 Inst.addOperand(MCOperand::CreateImm(0));
2236 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2237 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2242 /// Parse an ARM memory expression, return false if successful else return true
2243 /// or an error. The first token must be a '[' when called.
2245 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2247 assert(Parser.getTok().is(AsmToken::LBrac) &&
2248 "Token is not a Left Bracket");
2249 S = Parser.getTok().getLoc();
2250 Parser.Lex(); // Eat left bracket token.
2252 const AsmToken &BaseRegTok = Parser.getTok();
2253 int BaseRegNum = tryParseRegister();
2254 if (BaseRegNum == -1)
2255 return Error(BaseRegTok.getLoc(), "register expected");
2257 // The next token must either be a comma or a closing bracket.
2258 const AsmToken &Tok = Parser.getTok();
2259 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2260 return Error(Tok.getLoc(), "malformed memory operand");
2262 if (Tok.is(AsmToken::RBrac)) {
2264 Parser.Lex(); // Eat right bracket token.
2266 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2272 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2273 Parser.Lex(); // Eat the comma.
2275 // If we have a '#' it's an immediate offset, else assume it's a register
2277 if (Parser.getTok().is(AsmToken::Hash)) {
2278 Parser.Lex(); // Eat the '#'.
2279 E = Parser.getTok().getLoc();
2281 // FIXME: Special case #-0 so we can correctly set the U bit.
2283 const MCExpr *Offset;
2284 if (getParser().ParseExpression(Offset))
2287 // The expression has to be a constant. Memory references with relocations
2288 // don't come through here, as they use the <label> forms of the relevant
2290 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2292 return Error (E, "constant expression expected");
2294 // Now we should have the closing ']'
2295 E = Parser.getTok().getLoc();
2296 if (Parser.getTok().isNot(AsmToken::RBrac))
2297 return Error(E, "']' expected");
2298 Parser.Lex(); // Eat right bracket token.
2300 // Don't worry about range checking the value here. That's handled by
2301 // the is*() predicates.
2302 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2303 ARM_AM::no_shift, 0, false, S,E));
2305 // If there's a pre-indexing writeback marker, '!', just add it as a token
2307 if (Parser.getTok().is(AsmToken::Exclaim)) {
2308 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2309 Parser.Lex(); // Eat the '!'.
2315 // The register offset is optionally preceded by a '+' or '-'
2316 bool isNegative = false;
2317 if (Parser.getTok().is(AsmToken::Minus)) {
2319 Parser.Lex(); // Eat the '-'.
2320 } else if (Parser.getTok().is(AsmToken::Plus)) {
2322 Parser.Lex(); // Eat the '+'.
2325 E = Parser.getTok().getLoc();
2326 int OffsetRegNum = tryParseRegister();
2327 if (OffsetRegNum == -1)
2328 return Error(E, "register expected");
2330 // If there's a shift operator, handle it.
2331 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2332 unsigned ShiftImm = 0;
2333 if (Parser.getTok().is(AsmToken::Comma)) {
2334 Parser.Lex(); // Eat the ','.
2335 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2339 // Now we should have the closing ']'
2340 E = Parser.getTok().getLoc();
2341 if (Parser.getTok().isNot(AsmToken::RBrac))
2342 return Error(E, "']' expected");
2343 Parser.Lex(); // Eat right bracket token.
2345 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2346 ShiftType, ShiftImm, isNegative,
2349 // If there's a pre-indexing writeback marker, '!', just add it as a token
2351 if (Parser.getTok().is(AsmToken::Exclaim)) {
2352 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2353 Parser.Lex(); // Eat the '!'.
2359 /// parseMemRegOffsetShift - one of these two:
2360 /// ( lsl | lsr | asr | ror ) , # shift_amount
2362 /// return true if it parses a shift otherwise it returns false.
2363 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2365 SMLoc Loc = Parser.getTok().getLoc();
2366 const AsmToken &Tok = Parser.getTok();
2367 if (Tok.isNot(AsmToken::Identifier))
2369 StringRef ShiftName = Tok.getString();
2370 if (ShiftName == "lsl" || ShiftName == "LSL")
2372 else if (ShiftName == "lsr" || ShiftName == "LSR")
2374 else if (ShiftName == "asr" || ShiftName == "ASR")
2376 else if (ShiftName == "ror" || ShiftName == "ROR")
2378 else if (ShiftName == "rrx" || ShiftName == "RRX")
2381 return Error(Loc, "illegal shift operator");
2382 Parser.Lex(); // Eat shift type token.
2384 // rrx stands alone.
2386 if (St != ARM_AM::rrx) {
2387 Loc = Parser.getTok().getLoc();
2388 // A '#' and a shift amount.
2389 const AsmToken &HashTok = Parser.getTok();
2390 if (HashTok.isNot(AsmToken::Hash))
2391 return Error(HashTok.getLoc(), "'#' expected");
2392 Parser.Lex(); // Eat hash token.
2395 if (getParser().ParseExpression(Expr))
2397 // Range check the immediate.
2398 // lsl, ror: 0 <= imm <= 31
2399 // lsr, asr: 0 <= imm <= 32
2400 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2402 return Error(Loc, "shift amount must be an immediate");
2403 int64_t Imm = CE->getValue();
2405 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2406 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2407 return Error(Loc, "immediate shift value out of range");
2414 /// Parse a arm instruction operand. For now this parses the operand regardless
2415 /// of the mnemonic.
2416 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2417 StringRef Mnemonic) {
2420 // Check if the current operand has a custom associated parser, if so, try to
2421 // custom parse the operand, or fallback to the general approach.
2422 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2423 if (ResTy == MatchOperand_Success)
2425 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2426 // there was a match, but an error occurred, in which case, just return that
2427 // the operand parsing failed.
2428 if (ResTy == MatchOperand_ParseFail)
2431 switch (getLexer().getKind()) {
2433 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2435 case AsmToken::Identifier: {
2436 if (!tryParseRegisterWithWriteBack(Operands))
2438 int Res = tryParseShiftRegister(Operands);
2439 if (Res == 0) // success
2441 else if (Res == -1) // irrecoverable error
2444 // Fall though for the Identifier case that is not a register or a
2447 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2448 case AsmToken::Dot: { // . as a branch target
2449 // This was not a register so parse other operands that start with an
2450 // identifier (like labels) as expressions and create them as immediates.
2451 const MCExpr *IdVal;
2452 S = Parser.getTok().getLoc();
2453 if (getParser().ParseExpression(IdVal))
2455 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2456 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2459 case AsmToken::LBrac:
2460 return parseMemory(Operands);
2461 case AsmToken::LCurly:
2462 return parseRegisterList(Operands);
2463 case AsmToken::Hash:
2464 // #42 -> immediate.
2465 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2466 S = Parser.getTok().getLoc();
2468 const MCExpr *ImmVal;
2469 if (getParser().ParseExpression(ImmVal))
2471 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2472 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2474 case AsmToken::Colon: {
2475 // ":lower16:" and ":upper16:" expression prefixes
2476 // FIXME: Check it's an expression prefix,
2477 // e.g. (FOO - :lower16:BAR) isn't legal.
2478 ARMMCExpr::VariantKind RefKind;
2479 if (parsePrefix(RefKind))
2482 const MCExpr *SubExprVal;
2483 if (getParser().ParseExpression(SubExprVal))
2486 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2488 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2489 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2495 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2496 // :lower16: and :upper16:.
2497 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2498 RefKind = ARMMCExpr::VK_ARM_None;
2500 // :lower16: and :upper16: modifiers
2501 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2502 Parser.Lex(); // Eat ':'
2504 if (getLexer().isNot(AsmToken::Identifier)) {
2505 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2509 StringRef IDVal = Parser.getTok().getIdentifier();
2510 if (IDVal == "lower16") {
2511 RefKind = ARMMCExpr::VK_ARM_LO16;
2512 } else if (IDVal == "upper16") {
2513 RefKind = ARMMCExpr::VK_ARM_HI16;
2515 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2520 if (getLexer().isNot(AsmToken::Colon)) {
2521 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2524 Parser.Lex(); // Eat the last ':'
2529 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2530 MCSymbolRefExpr::VariantKind Variant) {
2531 // Recurse over the given expression, rebuilding it to apply the given variant
2532 // to the leftmost symbol.
2533 if (Variant == MCSymbolRefExpr::VK_None)
2536 switch (E->getKind()) {
2537 case MCExpr::Target:
2538 llvm_unreachable("Can't handle target expr yet");
2539 case MCExpr::Constant:
2540 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2542 case MCExpr::SymbolRef: {
2543 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2545 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2548 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2552 llvm_unreachable("Can't handle unary expressions yet");
2554 case MCExpr::Binary: {
2555 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2556 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2557 const MCExpr *RHS = BE->getRHS();
2561 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2565 assert(0 && "Invalid expression kind!");
2569 /// \brief Given a mnemonic, split out possible predication code and carry
2570 /// setting letters to form a canonical mnemonic and flags.
2572 // FIXME: Would be nice to autogen this.
2573 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2574 unsigned &PredicationCode,
2576 unsigned &ProcessorIMod) {
2577 PredicationCode = ARMCC::AL;
2578 CarrySetting = false;
2581 // Ignore some mnemonics we know aren't predicated forms.
2583 // FIXME: Would be nice to autogen this.
2584 if ((Mnemonic == "movs" && isThumb()) ||
2585 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2586 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2587 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2588 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2589 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2590 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2591 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2594 // First, split out any predication code. Ignore mnemonics we know aren't
2595 // predicated but do have a carry-set and so weren't caught above.
2596 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2597 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2598 Mnemonic != "umlals" && Mnemonic != "umulls") {
2599 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2600 .Case("eq", ARMCC::EQ)
2601 .Case("ne", ARMCC::NE)
2602 .Case("hs", ARMCC::HS)
2603 .Case("cs", ARMCC::HS)
2604 .Case("lo", ARMCC::LO)
2605 .Case("cc", ARMCC::LO)
2606 .Case("mi", ARMCC::MI)
2607 .Case("pl", ARMCC::PL)
2608 .Case("vs", ARMCC::VS)
2609 .Case("vc", ARMCC::VC)
2610 .Case("hi", ARMCC::HI)
2611 .Case("ls", ARMCC::LS)
2612 .Case("ge", ARMCC::GE)
2613 .Case("lt", ARMCC::LT)
2614 .Case("gt", ARMCC::GT)
2615 .Case("le", ARMCC::LE)
2616 .Case("al", ARMCC::AL)
2619 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2620 PredicationCode = CC;
2624 // Next, determine if we have a carry setting bit. We explicitly ignore all
2625 // the instructions we know end in 's'.
2626 if (Mnemonic.endswith("s") &&
2627 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
2628 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2629 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2630 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2631 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2632 (Mnemonic == "movs" && isThumb()))) {
2633 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2634 CarrySetting = true;
2637 // The "cps" instruction can have a interrupt mode operand which is glued into
2638 // the mnemonic. Check if this is the case, split it and parse the imod op
2639 if (Mnemonic.startswith("cps")) {
2640 // Split out any imod code.
2642 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2643 .Case("ie", ARM_PROC::IE)
2644 .Case("id", ARM_PROC::ID)
2647 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2648 ProcessorIMod = IMod;
2655 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2656 /// inclusion of carry set or predication code operands.
2658 // FIXME: It would be nice to autogen this.
2660 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2661 bool &CanAcceptPredicationCode) {
2662 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2663 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2664 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2665 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2666 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2667 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2668 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2669 Mnemonic == "eor" || Mnemonic == "smlal" ||
2670 (Mnemonic == "mov" && !isThumbOne())) {
2671 CanAcceptCarrySet = true;
2673 CanAcceptCarrySet = false;
2676 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2677 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2678 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2679 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2680 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2681 Mnemonic == "setend" ||
2682 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2683 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2685 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2686 CanAcceptPredicationCode = false;
2688 CanAcceptPredicationCode = true;
2692 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2693 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2694 CanAcceptPredicationCode = false;
2697 /// Parse an arm instruction mnemonic followed by its operands.
2698 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2699 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2700 // Create the leading tokens for the mnemonic, split by '.' characters.
2701 size_t Start = 0, Next = Name.find('.');
2702 StringRef Mnemonic = Name.slice(Start, Next);
2704 // Split out the predication code and carry setting flag from the mnemonic.
2705 unsigned PredicationCode;
2706 unsigned ProcessorIMod;
2708 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2711 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2713 // FIXME: This is all a pretty gross hack. We should automatically handle
2714 // optional operands like this via tblgen.
2716 // Next, add the CCOut and ConditionCode operands, if needed.
2718 // For mnemonics which can ever incorporate a carry setting bit or predication
2719 // code, our matching model involves us always generating CCOut and
2720 // ConditionCode operands to match the mnemonic "as written" and then we let
2721 // the matcher deal with finding the right instruction or generating an
2722 // appropriate error.
2723 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2724 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2726 // If we had a carry-set on an instruction that can't do that, issue an
2728 if (!CanAcceptCarrySet && CarrySetting) {
2729 Parser.EatToEndOfStatement();
2730 return Error(NameLoc, "instruction '" + Mnemonic +
2731 "' can not set flags, but 's' suffix specified");
2733 // If we had a predication code on an instruction that can't do that, issue an
2735 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2736 Parser.EatToEndOfStatement();
2737 return Error(NameLoc, "instruction '" + Mnemonic +
2738 "' is not predicable, but condition code specified");
2741 // Add the carry setting operand, if necessary.
2743 // FIXME: It would be awesome if we could somehow invent a location such that
2744 // match errors on this operand would print a nice diagnostic about how the
2745 // 's' character in the mnemonic resulted in a CCOut operand.
2746 if (CanAcceptCarrySet)
2747 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2750 // Add the predication code operand, if necessary.
2751 if (CanAcceptPredicationCode) {
2752 Operands.push_back(ARMOperand::CreateCondCode(
2753 ARMCC::CondCodes(PredicationCode), NameLoc));
2756 // Add the processor imod operand, if necessary.
2757 if (ProcessorIMod) {
2758 Operands.push_back(ARMOperand::CreateImm(
2759 MCConstantExpr::Create(ProcessorIMod, getContext()),
2762 // This mnemonic can't ever accept a imod, but the user wrote
2763 // one (or misspelled another mnemonic).
2765 // FIXME: Issue a nice error.
2768 // Add the remaining tokens in the mnemonic.
2769 while (Next != StringRef::npos) {
2771 Next = Name.find('.', Start + 1);
2772 StringRef ExtraToken = Name.slice(Start, Next);
2774 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2777 // Read the remaining operands.
2778 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2779 // Read the first operand.
2780 if (parseOperand(Operands, Mnemonic)) {
2781 Parser.EatToEndOfStatement();
2785 while (getLexer().is(AsmToken::Comma)) {
2786 Parser.Lex(); // Eat the comma.
2788 // Parse and remember the operand.
2789 if (parseOperand(Operands, Mnemonic)) {
2790 Parser.EatToEndOfStatement();
2796 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2797 Parser.EatToEndOfStatement();
2798 return TokError("unexpected token in argument list");
2801 Parser.Lex(); // Consume the EndOfStatement
2804 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2805 // another does not. Specifically, the MOVW instruction does not. So we
2806 // special case it here and remove the defaulted (non-setting) cc_out
2807 // operand if that's the instruction we're trying to match.
2809 // We do this post-processing of the explicit operands rather than just
2810 // conditionally adding the cc_out in the first place because we need
2811 // to check the type of the parsed immediate operand.
2812 if (Mnemonic == "mov" && Operands.size() > 4 &&
2813 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2814 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2815 static_cast<ARMOperand*>(Operands[1])->getReg() == 0) {
2816 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2817 Operands.erase(Operands.begin() + 1);
2821 // ARM mode 'blx' need special handling, as the register operand version
2822 // is predicable, but the label operand version is not. So, we can't rely
2823 // on the Mnemonic based checking to correctly figure out when to put
2824 // a CondCode operand in the list. If we're trying to match the label
2825 // version, remove the CondCode operand here.
2826 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2827 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2828 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2829 Operands.erase(Operands.begin() + 1);
2835 // Validate context-sensitive operand constraints.
2836 // FIXME: We would really like to be able to tablegen'erate this.
2838 validateInstruction(MCInst &Inst,
2839 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2840 switch (Inst.getOpcode()) {
2843 case ARM::LDRD_POST:
2845 // Rt2 must be Rt + 1.
2846 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2847 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2849 return Error(Operands[3]->getStartLoc(),
2850 "destination operands must be sequential");
2855 case ARM::STRD_POST:
2857 // Rt2 must be Rt + 1.
2858 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2859 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
2861 return Error(Operands[4]->getStartLoc(),
2862 "source operands must be sequential");
2867 // width must be in range [1, 32-lsb]
2868 unsigned lsb = Inst.getOperand(2).getImm();
2869 unsigned widthm1 = Inst.getOperand(3).getImm();
2870 if (widthm1 >= 32 - lsb)
2871 return Error(Operands[5]->getStartLoc(),
2872 "bitfield width must be in range [1,32-lsb]");
2880 processInstruction(MCInst &Inst,
2881 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2882 switch (Inst.getOpcode()) {
2883 case ARM::LDMIA_UPD:
2884 // If this is a load of a single register via a 'pop', then we should use
2885 // a post-indexed LDR instruction instead, per the ARM ARM.
2886 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
2887 Inst.getNumOperands() == 5) {
2889 TmpInst.setOpcode(ARM::LDR_POST_IMM);
2890 TmpInst.addOperand(Inst.getOperand(4)); // Rt
2891 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
2892 TmpInst.addOperand(Inst.getOperand(1)); // Rn
2893 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
2894 TmpInst.addOperand(MCOperand::CreateImm(4));
2895 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
2896 TmpInst.addOperand(Inst.getOperand(3));
2900 case ARM::STMDB_UPD:
2901 // If this is a store of a single register via a 'push', then we should use
2902 // a pre-indexed STR instruction instead, per the ARM ARM.
2903 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
2904 Inst.getNumOperands() == 5) {
2906 TmpInst.setOpcode(ARM::STR_PRE_IMM);
2907 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
2908 TmpInst.addOperand(Inst.getOperand(4)); // Rt
2909 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
2910 TmpInst.addOperand(MCOperand::CreateImm(-4));
2911 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
2912 TmpInst.addOperand(Inst.getOperand(3));
2920 MatchAndEmitInstruction(SMLoc IDLoc,
2921 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2925 MatchResultTy MatchResult;
2926 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2927 switch (MatchResult) {
2929 // Context sensitive operand constraints aren't handled by the matcher,
2930 // so check them here.
2931 if (validateInstruction(Inst, Operands))
2934 // Some instructions need post-processing to, for example, tweak which
2935 // encoding is selected.
2936 processInstruction(Inst, Operands);
2938 Out.EmitInstruction(Inst);
2940 case Match_MissingFeature:
2941 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2943 case Match_InvalidOperand: {
2944 SMLoc ErrorLoc = IDLoc;
2945 if (ErrorInfo != ~0U) {
2946 if (ErrorInfo >= Operands.size())
2947 return Error(IDLoc, "too few operands for instruction");
2949 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2950 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2953 return Error(ErrorLoc, "invalid operand for instruction");
2955 case Match_MnemonicFail:
2956 return Error(IDLoc, "unrecognized instruction mnemonic");
2957 case Match_ConversionFail:
2958 return Error(IDLoc, "unable to convert operands to instruction");
2961 llvm_unreachable("Implement any new match types added!");
2965 /// parseDirective parses the arm specific directives
2966 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2967 StringRef IDVal = DirectiveID.getIdentifier();
2968 if (IDVal == ".word")
2969 return parseDirectiveWord(4, DirectiveID.getLoc());
2970 else if (IDVal == ".thumb")
2971 return parseDirectiveThumb(DirectiveID.getLoc());
2972 else if (IDVal == ".thumb_func")
2973 return parseDirectiveThumbFunc(DirectiveID.getLoc());
2974 else if (IDVal == ".code")
2975 return parseDirectiveCode(DirectiveID.getLoc());
2976 else if (IDVal == ".syntax")
2977 return parseDirectiveSyntax(DirectiveID.getLoc());
2981 /// parseDirectiveWord
2982 /// ::= .word [ expression (, expression)* ]
2983 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
2984 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2986 const MCExpr *Value;
2987 if (getParser().ParseExpression(Value))
2990 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2992 if (getLexer().is(AsmToken::EndOfStatement))
2995 // FIXME: Improve diagnostic.
2996 if (getLexer().isNot(AsmToken::Comma))
2997 return Error(L, "unexpected token in directive");
3006 /// parseDirectiveThumb
3008 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3009 if (getLexer().isNot(AsmToken::EndOfStatement))
3010 return Error(L, "unexpected token in directive");
3013 // TODO: set thumb mode
3014 // TODO: tell the MC streamer the mode
3015 // getParser().getStreamer().Emit???();
3019 /// parseDirectiveThumbFunc
3020 /// ::= .thumbfunc symbol_name
3021 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3022 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3023 bool isMachO = MAI.hasSubsectionsViaSymbols();
3026 // Darwin asm has function name after .thumb_func direction
3029 const AsmToken &Tok = Parser.getTok();
3030 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3031 return Error(L, "unexpected token in .thumb_func directive");
3032 Name = Tok.getString();
3033 Parser.Lex(); // Consume the identifier token.
3036 if (getLexer().isNot(AsmToken::EndOfStatement))
3037 return Error(L, "unexpected token in directive");
3040 // FIXME: assuming function name will be the line following .thumb_func
3042 Name = Parser.getTok().getString();
3045 // Mark symbol as a thumb symbol.
3046 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3047 getParser().getStreamer().EmitThumbFunc(Func);
3051 /// parseDirectiveSyntax
3052 /// ::= .syntax unified | divided
3053 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3054 const AsmToken &Tok = Parser.getTok();
3055 if (Tok.isNot(AsmToken::Identifier))
3056 return Error(L, "unexpected token in .syntax directive");
3057 StringRef Mode = Tok.getString();
3058 if (Mode == "unified" || Mode == "UNIFIED")
3060 else if (Mode == "divided" || Mode == "DIVIDED")
3061 return Error(L, "'.syntax divided' arm asssembly not supported");
3063 return Error(L, "unrecognized syntax mode in .syntax directive");
3065 if (getLexer().isNot(AsmToken::EndOfStatement))
3066 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3069 // TODO tell the MC streamer the mode
3070 // getParser().getStreamer().Emit???();
3074 /// parseDirectiveCode
3075 /// ::= .code 16 | 32
3076 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3077 const AsmToken &Tok = Parser.getTok();
3078 if (Tok.isNot(AsmToken::Integer))
3079 return Error(L, "unexpected token in .code directive");
3080 int64_t Val = Parser.getTok().getIntVal();
3086 return Error(L, "invalid operand to .code directive");
3088 if (getLexer().isNot(AsmToken::EndOfStatement))
3089 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3095 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3100 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3107 extern "C" void LLVMInitializeARMAsmLexer();
3109 /// Force static initialization.
3110 extern "C" void LLVMInitializeARMAsmParser() {
3111 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3112 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3113 LLVMInitializeARMAsmLexer();
3116 #define GET_REGISTER_MATCHER
3117 #define GET_MATCHER_IMPLEMENTATION
3118 #include "ARMGenAsmMatcher.inc"