1 //===-- ARMAsmParser.cpp - Parse ARM assembly to MCInst instructions ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/ARMBaseInfo.h"
11 #include "MCTargetDesc/ARMAddressingModes.h"
12 #include "MCTargetDesc/ARMMCExpr.h"
13 #include "llvm/MC/MCParser/MCAsmLexer.h"
14 #include "llvm/MC/MCParser/MCAsmParser.h"
15 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
16 #include "llvm/MC/MCAsmInfo.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCStreamer.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/MC/MCTargetAsmParser.h"
24 #include "llvm/Target/TargetRegistry.h"
25 #include "llvm/Support/SourceMgr.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include "llvm/ADT/OwningPtr.h"
28 #include "llvm/ADT/STLExtras.h"
29 #include "llvm/ADT/SmallVector.h"
30 #include "llvm/ADT/StringExtras.h"
31 #include "llvm/ADT/StringSwitch.h"
32 #include "llvm/ADT/Twine.h"
40 class ARMAsmParser : public MCTargetAsmParser {
44 MCAsmParser &getParser() const { return Parser; }
45 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
47 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
48 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
50 int tryParseRegister();
51 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
52 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
53 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
54 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
55 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
56 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
57 const MCExpr *applyPrefixToExpr(const MCExpr *E,
58 MCSymbolRefExpr::VariantKind Variant);
61 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
62 unsigned &ShiftAmount);
63 bool parseDirectiveWord(unsigned Size, SMLoc L);
64 bool parseDirectiveThumb(SMLoc L);
65 bool parseDirectiveThumbFunc(SMLoc L);
66 bool parseDirectiveCode(SMLoc L);
67 bool parseDirectiveSyntax(SMLoc L);
69 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
70 bool &CarrySetting, unsigned &ProcessorIMod);
71 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
72 bool &CanAcceptPredicationCode);
74 bool isThumb() const {
75 // FIXME: Can tablegen auto-generate this?
76 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
78 bool isThumbOne() const {
79 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
82 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
83 setAvailableFeatures(FB);
86 /// @name Auto-generated Match Functions
89 #define GET_ASSEMBLER_HEADER
90 #include "ARMGenAsmMatcher.inc"
94 OperandMatchResultTy parseCoprocNumOperand(
95 SmallVectorImpl<MCParsedAsmOperand*>&);
96 OperandMatchResultTy parseCoprocRegOperand(
97 SmallVectorImpl<MCParsedAsmOperand*>&);
98 OperandMatchResultTy parseMemBarrierOptOperand(
99 SmallVectorImpl<MCParsedAsmOperand*>&);
100 OperandMatchResultTy parseProcIFlagsOperand(
101 SmallVectorImpl<MCParsedAsmOperand*>&);
102 OperandMatchResultTy parseMSRMaskOperand(
103 SmallVectorImpl<MCParsedAsmOperand*>&);
104 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
105 StringRef Op, int Low, int High);
106 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
107 return parsePKHImm(O, "lsl", 0, 31);
109 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
110 return parsePKHImm(O, "asr", 1, 32);
112 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
113 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
114 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
115 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
116 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
117 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
119 // Asm Match Converter Methods
120 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
121 const SmallVectorImpl<MCParsedAsmOperand*> &);
122 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
123 const SmallVectorImpl<MCParsedAsmOperand*> &);
124 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
125 const SmallVectorImpl<MCParsedAsmOperand*> &);
126 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
127 const SmallVectorImpl<MCParsedAsmOperand*> &);
128 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
129 const SmallVectorImpl<MCParsedAsmOperand*> &);
130 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
131 const SmallVectorImpl<MCParsedAsmOperand*> &);
132 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
133 const SmallVectorImpl<MCParsedAsmOperand*> &);
134 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
135 const SmallVectorImpl<MCParsedAsmOperand*> &);
137 bool validateInstruction(MCInst &Inst,
138 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
139 void processInstruction(MCInst &Inst,
140 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
143 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
144 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
145 MCAsmParserExtension::Initialize(_Parser);
147 // Initialize the set of available features.
148 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
151 // Implementation of the MCTargetAsmParser interface:
152 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
153 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
154 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
155 bool ParseDirective(AsmToken DirectiveID);
157 bool MatchAndEmitInstruction(SMLoc IDLoc,
158 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
161 } // end anonymous namespace
165 /// ARMOperand - Instances of this class represent a parsed ARM machine
167 class ARMOperand : public MCParsedAsmOperand {
191 SMLoc StartLoc, EndLoc;
192 SmallVector<unsigned, 8> Registers;
196 ARMCC::CondCodes Val;
208 ARM_PROC::IFlags Val;
228 /// Combined record for all forms of ARM address expressions.
231 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
233 const MCConstantExpr *OffsetImm; // Offset immediate value
234 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
235 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
236 unsigned ShiftImm; // shift for OffsetReg.
237 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
243 ARM_AM::ShiftOpc ShiftTy;
252 ARM_AM::ShiftOpc ShiftTy;
258 ARM_AM::ShiftOpc ShiftTy;
271 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
273 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
275 StartLoc = o.StartLoc;
289 case DPRRegisterList:
290 case SPRRegisterList:
291 Registers = o.Registers;
306 case PostIndexRegister:
307 PostIdxReg = o.PostIdxReg;
315 case ShifterImmediate:
316 ShifterImm = o.ShifterImm;
318 case ShiftedRegister:
319 RegShiftedReg = o.RegShiftedReg;
321 case ShiftedImmediate:
322 RegShiftedImm = o.RegShiftedImm;
324 case RotateImmediate:
327 case BitfieldDescriptor:
328 Bitfield = o.Bitfield;
333 /// getStartLoc - Get the location of the first token of this operand.
334 SMLoc getStartLoc() const { return StartLoc; }
335 /// getEndLoc - Get the location of the last token of this operand.
336 SMLoc getEndLoc() const { return EndLoc; }
338 ARMCC::CondCodes getCondCode() const {
339 assert(Kind == CondCode && "Invalid access!");
343 unsigned getCoproc() const {
344 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
348 StringRef getToken() const {
349 assert(Kind == Token && "Invalid access!");
350 return StringRef(Tok.Data, Tok.Length);
353 unsigned getReg() const {
354 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
358 const SmallVectorImpl<unsigned> &getRegList() const {
359 assert((Kind == RegisterList || Kind == DPRRegisterList ||
360 Kind == SPRRegisterList) && "Invalid access!");
364 const MCExpr *getImm() const {
365 assert(Kind == Immediate && "Invalid access!");
369 ARM_MB::MemBOpt getMemBarrierOpt() const {
370 assert(Kind == MemBarrierOpt && "Invalid access!");
374 ARM_PROC::IFlags getProcIFlags() const {
375 assert(Kind == ProcIFlags && "Invalid access!");
379 unsigned getMSRMask() const {
380 assert(Kind == MSRMask && "Invalid access!");
384 bool isCoprocNum() const { return Kind == CoprocNum; }
385 bool isCoprocReg() const { return Kind == CoprocReg; }
386 bool isCondCode() const { return Kind == CondCode; }
387 bool isCCOut() const { return Kind == CCOut; }
388 bool isImm() const { return Kind == Immediate; }
389 bool isImm0_255() const {
390 if (Kind != Immediate)
392 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
393 if (!CE) return false;
394 int64_t Value = CE->getValue();
395 return Value >= 0 && Value < 256;
397 bool isImm0_7() const {
398 if (Kind != Immediate)
400 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
401 if (!CE) return false;
402 int64_t Value = CE->getValue();
403 return Value >= 0 && Value < 8;
405 bool isImm0_15() const {
406 if (Kind != Immediate)
408 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
409 if (!CE) return false;
410 int64_t Value = CE->getValue();
411 return Value >= 0 && Value < 16;
413 bool isImm0_31() const {
414 if (Kind != Immediate)
416 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
417 if (!CE) return false;
418 int64_t Value = CE->getValue();
419 return Value >= 0 && Value < 32;
421 bool isImm1_16() const {
422 if (Kind != Immediate)
424 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
425 if (!CE) return false;
426 int64_t Value = CE->getValue();
427 return Value > 0 && Value < 17;
429 bool isImm1_32() const {
430 if (Kind != Immediate)
432 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
433 if (!CE) return false;
434 int64_t Value = CE->getValue();
435 return Value > 0 && Value < 33;
437 bool isImm0_65535() const {
438 if (Kind != Immediate)
440 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
441 if (!CE) return false;
442 int64_t Value = CE->getValue();
443 return Value >= 0 && Value < 65536;
445 bool isImm0_65535Expr() const {
446 if (Kind != Immediate)
448 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
449 // If it's not a constant expression, it'll generate a fixup and be
451 if (!CE) return true;
452 int64_t Value = CE->getValue();
453 return Value >= 0 && Value < 65536;
455 bool isImm24bit() const {
456 if (Kind != Immediate)
458 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
459 if (!CE) return false;
460 int64_t Value = CE->getValue();
461 return Value >= 0 && Value <= 0xffffff;
463 bool isPKHLSLImm() const {
464 if (Kind != Immediate)
466 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
467 if (!CE) return false;
468 int64_t Value = CE->getValue();
469 return Value >= 0 && Value < 32;
471 bool isPKHASRImm() const {
472 if (Kind != Immediate)
474 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
475 if (!CE) return false;
476 int64_t Value = CE->getValue();
477 return Value > 0 && Value <= 32;
479 bool isARMSOImm() const {
480 if (Kind != Immediate)
482 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
483 if (!CE) return false;
484 int64_t Value = CE->getValue();
485 return ARM_AM::getSOImmVal(Value) != -1;
487 bool isT2SOImm() const {
488 if (Kind != Immediate)
490 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
491 if (!CE) return false;
492 int64_t Value = CE->getValue();
493 return ARM_AM::getT2SOImmVal(Value) != -1;
495 bool isSetEndImm() const {
496 if (Kind != Immediate)
498 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
499 if (!CE) return false;
500 int64_t Value = CE->getValue();
501 return Value == 1 || Value == 0;
503 bool isReg() const { return Kind == Register; }
504 bool isRegList() const { return Kind == RegisterList; }
505 bool isDPRRegList() const { return Kind == DPRRegisterList; }
506 bool isSPRRegList() const { return Kind == SPRRegisterList; }
507 bool isToken() const { return Kind == Token; }
508 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
509 bool isMemory() const { return Kind == Memory; }
510 bool isShifterImm() const { return Kind == ShifterImmediate; }
511 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
512 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
513 bool isRotImm() const { return Kind == RotateImmediate; }
514 bool isBitfield() const { return Kind == BitfieldDescriptor; }
515 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
516 bool isPostIdxReg() const {
517 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
519 bool isMemNoOffset() const {
522 // No offset of any kind.
523 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
525 bool isAddrMode2() const {
528 // Check for register offset.
529 if (Mem.OffsetRegNum) return true;
530 // Immediate offset in range [-4095, 4095].
531 if (!Mem.OffsetImm) return true;
532 int64_t Val = Mem.OffsetImm->getValue();
533 return Val > -4096 && Val < 4096;
535 bool isAM2OffsetImm() const {
536 if (Kind != Immediate)
538 // Immediate offset in range [-4095, 4095].
539 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
540 if (!CE) return false;
541 int64_t Val = CE->getValue();
542 return Val > -4096 && Val < 4096;
544 bool isAddrMode3() const {
547 // No shifts are legal for AM3.
548 if (Mem.ShiftType != ARM_AM::no_shift) return false;
549 // Check for register offset.
550 if (Mem.OffsetRegNum) return true;
551 // Immediate offset in range [-255, 255].
552 if (!Mem.OffsetImm) return true;
553 int64_t Val = Mem.OffsetImm->getValue();
554 return Val > -256 && Val < 256;
556 bool isAM3Offset() const {
557 if (Kind != Immediate && Kind != PostIndexRegister)
559 if (Kind == PostIndexRegister)
560 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
561 // Immediate offset in range [-255, 255].
562 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
563 if (!CE) return false;
564 int64_t Val = CE->getValue();
565 // Special case, #-0 is INT32_MIN.
566 return (Val > -256 && Val < 256) || Val == INT32_MIN;
568 bool isAddrMode5() const {
571 // Check for register offset.
572 if (Mem.OffsetRegNum) return false;
573 // Immediate offset in range [-1020, 1020] and a multiple of 4.
574 if (!Mem.OffsetImm) return true;
575 int64_t Val = Mem.OffsetImm->getValue();
576 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
578 bool isMemRegOffset() const {
579 if (Kind != Memory || !Mem.OffsetRegNum)
583 bool isMemThumbRR() const {
584 // Thumb reg+reg addressing is simple. Just two registers, a base and
585 // an offset. No shifts, negations or any other complicating factors.
586 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
587 Mem.ShiftType != ARM_AM::no_shift)
591 bool isMemImm8Offset() const {
592 if (Kind != Memory || Mem.OffsetRegNum != 0)
594 // Immediate offset in range [-255, 255].
595 if (!Mem.OffsetImm) return true;
596 int64_t Val = Mem.OffsetImm->getValue();
597 return Val > -256 && Val < 256;
599 bool isMemImm12Offset() const {
600 // If we have an immediate that's not a constant, treat it as a label
601 // reference needing a fixup. If it is a constant, it's something else
603 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
606 if (Kind != Memory || Mem.OffsetRegNum != 0)
608 // Immediate offset in range [-4095, 4095].
609 if (!Mem.OffsetImm) return true;
610 int64_t Val = Mem.OffsetImm->getValue();
611 return Val > -4096 && Val < 4096;
613 bool isPostIdxImm8() const {
614 if (Kind != Immediate)
616 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
617 if (!CE) return false;
618 int64_t Val = CE->getValue();
619 return Val > -256 && Val < 256;
622 bool isMSRMask() const { return Kind == MSRMask; }
623 bool isProcIFlags() const { return Kind == ProcIFlags; }
625 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
626 // Add as immediates when possible. Null MCExpr = 0.
628 Inst.addOperand(MCOperand::CreateImm(0));
629 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
630 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
632 Inst.addOperand(MCOperand::CreateExpr(Expr));
635 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
636 assert(N == 2 && "Invalid number of operands!");
637 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
638 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
639 Inst.addOperand(MCOperand::CreateReg(RegNum));
642 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
643 assert(N == 1 && "Invalid number of operands!");
644 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
647 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
648 assert(N == 1 && "Invalid number of operands!");
649 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
652 void addCCOutOperands(MCInst &Inst, unsigned N) const {
653 assert(N == 1 && "Invalid number of operands!");
654 Inst.addOperand(MCOperand::CreateReg(getReg()));
657 void addRegOperands(MCInst &Inst, unsigned N) const {
658 assert(N == 1 && "Invalid number of operands!");
659 Inst.addOperand(MCOperand::CreateReg(getReg()));
662 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
663 assert(N == 3 && "Invalid number of operands!");
664 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
665 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
666 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
667 Inst.addOperand(MCOperand::CreateImm(
668 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
671 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
672 assert(N == 2 && "Invalid number of operands!");
673 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
674 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
675 Inst.addOperand(MCOperand::CreateImm(
676 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
680 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
681 assert(N == 1 && "Invalid number of operands!");
682 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
686 void addRegListOperands(MCInst &Inst, unsigned N) const {
687 assert(N == 1 && "Invalid number of operands!");
688 const SmallVectorImpl<unsigned> &RegList = getRegList();
689 for (SmallVectorImpl<unsigned>::const_iterator
690 I = RegList.begin(), E = RegList.end(); I != E; ++I)
691 Inst.addOperand(MCOperand::CreateReg(*I));
694 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
695 addRegListOperands(Inst, N);
698 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
699 addRegListOperands(Inst, N);
702 void addRotImmOperands(MCInst &Inst, unsigned N) const {
703 assert(N == 1 && "Invalid number of operands!");
704 // Encoded as val>>3. The printer handles display as 8, 16, 24.
705 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
708 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
709 assert(N == 1 && "Invalid number of operands!");
710 // Munge the lsb/width into a bitfield mask.
711 unsigned lsb = Bitfield.LSB;
712 unsigned width = Bitfield.Width;
713 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
714 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
715 (32 - (lsb + width)));
716 Inst.addOperand(MCOperand::CreateImm(Mask));
719 void addImmOperands(MCInst &Inst, unsigned N) const {
720 assert(N == 1 && "Invalid number of operands!");
721 addExpr(Inst, getImm());
724 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
725 assert(N == 1 && "Invalid number of operands!");
726 addExpr(Inst, getImm());
729 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
730 assert(N == 1 && "Invalid number of operands!");
731 addExpr(Inst, getImm());
734 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
735 assert(N == 1 && "Invalid number of operands!");
736 addExpr(Inst, getImm());
739 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
740 assert(N == 1 && "Invalid number of operands!");
741 addExpr(Inst, getImm());
744 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
745 assert(N == 1 && "Invalid number of operands!");
746 // The constant encodes as the immediate-1, and we store in the instruction
747 // the bits as encoded, so subtract off one here.
748 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
749 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
752 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
753 assert(N == 1 && "Invalid number of operands!");
754 // The constant encodes as the immediate-1, and we store in the instruction
755 // the bits as encoded, so subtract off one here.
756 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
757 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
760 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
761 assert(N == 1 && "Invalid number of operands!");
762 addExpr(Inst, getImm());
765 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
766 assert(N == 1 && "Invalid number of operands!");
767 addExpr(Inst, getImm());
770 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
771 assert(N == 1 && "Invalid number of operands!");
772 addExpr(Inst, getImm());
775 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
776 assert(N == 1 && "Invalid number of operands!");
777 addExpr(Inst, getImm());
780 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
781 assert(N == 1 && "Invalid number of operands!");
782 // An ASR value of 32 encodes as 0, so that's how we want to add it to
783 // the instruction as well.
784 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
785 int Val = CE->getValue();
786 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
789 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
790 assert(N == 1 && "Invalid number of operands!");
791 addExpr(Inst, getImm());
794 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
795 assert(N == 1 && "Invalid number of operands!");
796 addExpr(Inst, getImm());
799 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
800 assert(N == 1 && "Invalid number of operands!");
801 addExpr(Inst, getImm());
804 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
805 assert(N == 1 && "Invalid number of operands!");
806 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
809 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
810 assert(N == 1 && "Invalid number of operands!");
811 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
814 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
815 assert(N == 3 && "Invalid number of operands!");
816 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
817 if (!Mem.OffsetRegNum) {
818 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
819 // Special case for #-0
820 if (Val == INT32_MIN) Val = 0;
821 if (Val < 0) Val = -Val;
822 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
824 // For register offset, we encode the shift type and negation flag
826 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
829 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
830 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
831 Inst.addOperand(MCOperand::CreateImm(Val));
834 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
835 assert(N == 2 && "Invalid number of operands!");
836 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
837 assert(CE && "non-constant AM2OffsetImm operand!");
838 int32_t Val = CE->getValue();
839 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
840 // Special case for #-0
841 if (Val == INT32_MIN) Val = 0;
842 if (Val < 0) Val = -Val;
843 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
844 Inst.addOperand(MCOperand::CreateReg(0));
845 Inst.addOperand(MCOperand::CreateImm(Val));
848 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
849 assert(N == 3 && "Invalid number of operands!");
850 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
851 if (!Mem.OffsetRegNum) {
852 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
853 // Special case for #-0
854 if (Val == INT32_MIN) Val = 0;
855 if (Val < 0) Val = -Val;
856 Val = ARM_AM::getAM3Opc(AddSub, Val);
858 // For register offset, we encode the shift type and negation flag
860 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
862 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
863 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
864 Inst.addOperand(MCOperand::CreateImm(Val));
867 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
868 assert(N == 2 && "Invalid number of operands!");
869 if (Kind == PostIndexRegister) {
871 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
872 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
873 Inst.addOperand(MCOperand::CreateImm(Val));
878 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
879 int32_t Val = CE->getValue();
880 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
881 // Special case for #-0
882 if (Val == INT32_MIN) Val = 0;
883 if (Val < 0) Val = -Val;
884 Val = ARM_AM::getAM3Opc(AddSub, Val);
885 Inst.addOperand(MCOperand::CreateReg(0));
886 Inst.addOperand(MCOperand::CreateImm(Val));
889 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
890 assert(N == 2 && "Invalid number of operands!");
891 // The lower two bits are always zero and as such are not encoded.
892 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
893 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
894 // Special case for #-0
895 if (Val == INT32_MIN) Val = 0;
896 if (Val < 0) Val = -Val;
897 Val = ARM_AM::getAM5Opc(AddSub, Val);
898 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
899 Inst.addOperand(MCOperand::CreateImm(Val));
902 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
903 assert(N == 2 && "Invalid number of operands!");
904 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
905 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
906 Inst.addOperand(MCOperand::CreateImm(Val));
909 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
910 assert(N == 2 && "Invalid number of operands!");
911 // If this is an immediate, it's a label reference.
912 if (Kind == Immediate) {
913 addExpr(Inst, getImm());
914 Inst.addOperand(MCOperand::CreateImm(0));
918 // Otherwise, it's a normal memory reg+offset.
919 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
920 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
921 Inst.addOperand(MCOperand::CreateImm(Val));
924 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
925 assert(N == 3 && "Invalid number of operands!");
926 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
927 Mem.ShiftImm, Mem.ShiftType);
928 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
929 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
930 Inst.addOperand(MCOperand::CreateImm(Val));
933 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
934 assert(N == 2 && "Invalid number of operands!");
935 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
936 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
939 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
940 assert(N == 1 && "Invalid number of operands!");
941 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
942 assert(CE && "non-constant post-idx-imm8 operand!");
943 int Imm = CE->getValue();
944 bool isAdd = Imm >= 0;
945 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
946 Inst.addOperand(MCOperand::CreateImm(Imm));
949 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
950 assert(N == 2 && "Invalid number of operands!");
951 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
952 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
955 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
956 assert(N == 2 && "Invalid number of operands!");
957 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
958 // The sign, shift type, and shift amount are encoded in a single operand
959 // using the AM2 encoding helpers.
960 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
961 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
963 Inst.addOperand(MCOperand::CreateImm(Imm));
966 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
967 assert(N == 1 && "Invalid number of operands!");
968 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
971 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
972 assert(N == 1 && "Invalid number of operands!");
973 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
976 virtual void print(raw_ostream &OS) const;
978 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
979 ARMOperand *Op = new ARMOperand(CondCode);
986 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
987 ARMOperand *Op = new ARMOperand(CoprocNum);
988 Op->Cop.Val = CopVal;
994 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
995 ARMOperand *Op = new ARMOperand(CoprocReg);
996 Op->Cop.Val = CopVal;
1002 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1003 ARMOperand *Op = new ARMOperand(CCOut);
1004 Op->Reg.RegNum = RegNum;
1010 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1011 ARMOperand *Op = new ARMOperand(Token);
1012 Op->Tok.Data = Str.data();
1013 Op->Tok.Length = Str.size();
1019 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1020 ARMOperand *Op = new ARMOperand(Register);
1021 Op->Reg.RegNum = RegNum;
1027 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1032 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1033 Op->RegShiftedReg.ShiftTy = ShTy;
1034 Op->RegShiftedReg.SrcReg = SrcReg;
1035 Op->RegShiftedReg.ShiftReg = ShiftReg;
1036 Op->RegShiftedReg.ShiftImm = ShiftImm;
1042 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1046 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1047 Op->RegShiftedImm.ShiftTy = ShTy;
1048 Op->RegShiftedImm.SrcReg = SrcReg;
1049 Op->RegShiftedImm.ShiftImm = ShiftImm;
1055 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1057 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1058 Op->ShifterImm.isASR = isASR;
1059 Op->ShifterImm.Imm = Imm;
1065 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1066 ARMOperand *Op = new ARMOperand(RotateImmediate);
1067 Op->RotImm.Imm = Imm;
1073 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1075 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1076 Op->Bitfield.LSB = LSB;
1077 Op->Bitfield.Width = Width;
1084 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1085 SMLoc StartLoc, SMLoc EndLoc) {
1086 KindTy Kind = RegisterList;
1088 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1089 contains(Regs.front().first))
1090 Kind = DPRRegisterList;
1091 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1092 contains(Regs.front().first))
1093 Kind = SPRRegisterList;
1095 ARMOperand *Op = new ARMOperand(Kind);
1096 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1097 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1098 Op->Registers.push_back(I->first);
1099 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1100 Op->StartLoc = StartLoc;
1101 Op->EndLoc = EndLoc;
1105 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1106 ARMOperand *Op = new ARMOperand(Immediate);
1113 static ARMOperand *CreateMem(unsigned BaseRegNum,
1114 const MCConstantExpr *OffsetImm,
1115 unsigned OffsetRegNum,
1116 ARM_AM::ShiftOpc ShiftType,
1120 ARMOperand *Op = new ARMOperand(Memory);
1121 Op->Mem.BaseRegNum = BaseRegNum;
1122 Op->Mem.OffsetImm = OffsetImm;
1123 Op->Mem.OffsetRegNum = OffsetRegNum;
1124 Op->Mem.ShiftType = ShiftType;
1125 Op->Mem.ShiftImm = ShiftImm;
1126 Op->Mem.isNegative = isNegative;
1132 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1133 ARM_AM::ShiftOpc ShiftTy,
1136 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1137 Op->PostIdxReg.RegNum = RegNum;
1138 Op->PostIdxReg.isAdd = isAdd;
1139 Op->PostIdxReg.ShiftTy = ShiftTy;
1140 Op->PostIdxReg.ShiftImm = ShiftImm;
1146 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1147 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1148 Op->MBOpt.Val = Opt;
1154 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1155 ARMOperand *Op = new ARMOperand(ProcIFlags);
1156 Op->IFlags.Val = IFlags;
1162 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1163 ARMOperand *Op = new ARMOperand(MSRMask);
1164 Op->MMask.Val = MMask;
1171 } // end anonymous namespace.
1173 void ARMOperand::print(raw_ostream &OS) const {
1176 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1179 OS << "<ccout " << getReg() << ">";
1182 OS << "<coprocessor number: " << getCoproc() << ">";
1185 OS << "<coprocessor register: " << getCoproc() << ">";
1188 OS << "<mask: " << getMSRMask() << ">";
1191 getImm()->print(OS);
1194 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1198 << " base:" << Mem.BaseRegNum;
1201 case PostIndexRegister:
1202 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1203 << PostIdxReg.RegNum;
1204 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1205 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1206 << PostIdxReg.ShiftImm;
1210 OS << "<ARM_PROC::";
1211 unsigned IFlags = getProcIFlags();
1212 for (int i=2; i >= 0; --i)
1213 if (IFlags & (1 << i))
1214 OS << ARM_PROC::IFlagsToString(1 << i);
1219 OS << "<register " << getReg() << ">";
1221 case ShifterImmediate:
1222 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1223 << " #" << ShifterImm.Imm << ">";
1225 case ShiftedRegister:
1226 OS << "<so_reg_reg "
1227 << RegShiftedReg.SrcReg
1228 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1229 << ", " << RegShiftedReg.ShiftReg << ", "
1230 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1233 case ShiftedImmediate:
1234 OS << "<so_reg_imm "
1235 << RegShiftedImm.SrcReg
1236 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1237 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1240 case RotateImmediate:
1241 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1243 case BitfieldDescriptor:
1244 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1245 << ", width: " << Bitfield.Width << ">";
1248 case DPRRegisterList:
1249 case SPRRegisterList: {
1250 OS << "<register_list ";
1252 const SmallVectorImpl<unsigned> &RegList = getRegList();
1253 for (SmallVectorImpl<unsigned>::const_iterator
1254 I = RegList.begin(), E = RegList.end(); I != E; ) {
1256 if (++I < E) OS << ", ";
1263 OS << "'" << getToken() << "'";
1268 /// @name Auto-generated Match Functions
1271 static unsigned MatchRegisterName(StringRef Name);
1275 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1276 SMLoc &StartLoc, SMLoc &EndLoc) {
1277 RegNo = tryParseRegister();
1279 return (RegNo == (unsigned)-1);
1282 /// Try to parse a register name. The token must be an Identifier when called,
1283 /// and if it is a register name the token is eaten and the register number is
1284 /// returned. Otherwise return -1.
1286 int ARMAsmParser::tryParseRegister() {
1287 const AsmToken &Tok = Parser.getTok();
1288 if (Tok.isNot(AsmToken::Identifier)) return -1;
1290 // FIXME: Validate register for the current architecture; we have to do
1291 // validation later, so maybe there is no need for this here.
1292 std::string upperCase = Tok.getString().str();
1293 std::string lowerCase = LowercaseString(upperCase);
1294 unsigned RegNum = MatchRegisterName(lowerCase);
1296 RegNum = StringSwitch<unsigned>(lowerCase)
1297 .Case("r13", ARM::SP)
1298 .Case("r14", ARM::LR)
1299 .Case("r15", ARM::PC)
1300 .Case("ip", ARM::R12)
1303 if (!RegNum) return -1;
1305 Parser.Lex(); // Eat identifier token.
1309 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1310 // If a recoverable error occurs, return 1. If an irrecoverable error
1311 // occurs, return -1. An irrecoverable error is one where tokens have been
1312 // consumed in the process of trying to parse the shifter (i.e., when it is
1313 // indeed a shifter operand, but malformed).
1314 int ARMAsmParser::tryParseShiftRegister(
1315 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1316 SMLoc S = Parser.getTok().getLoc();
1317 const AsmToken &Tok = Parser.getTok();
1318 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1320 std::string upperCase = Tok.getString().str();
1321 std::string lowerCase = LowercaseString(upperCase);
1322 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1323 .Case("lsl", ARM_AM::lsl)
1324 .Case("lsr", ARM_AM::lsr)
1325 .Case("asr", ARM_AM::asr)
1326 .Case("ror", ARM_AM::ror)
1327 .Case("rrx", ARM_AM::rrx)
1328 .Default(ARM_AM::no_shift);
1330 if (ShiftTy == ARM_AM::no_shift)
1333 Parser.Lex(); // Eat the operator.
1335 // The source register for the shift has already been added to the
1336 // operand list, so we need to pop it off and combine it into the shifted
1337 // register operand instead.
1338 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1339 if (!PrevOp->isReg())
1340 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1341 int SrcReg = PrevOp->getReg();
1344 if (ShiftTy == ARM_AM::rrx) {
1345 // RRX Doesn't have an explicit shift amount. The encoder expects
1346 // the shift register to be the same as the source register. Seems odd,
1350 // Figure out if this is shifted by a constant or a register (for non-RRX).
1351 if (Parser.getTok().is(AsmToken::Hash)) {
1352 Parser.Lex(); // Eat hash.
1353 SMLoc ImmLoc = Parser.getTok().getLoc();
1354 const MCExpr *ShiftExpr = 0;
1355 if (getParser().ParseExpression(ShiftExpr)) {
1356 Error(ImmLoc, "invalid immediate shift value");
1359 // The expression must be evaluatable as an immediate.
1360 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1362 Error(ImmLoc, "invalid immediate shift value");
1365 // Range check the immediate.
1366 // lsl, ror: 0 <= imm <= 31
1367 // lsr, asr: 0 <= imm <= 32
1368 Imm = CE->getValue();
1370 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1371 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1372 Error(ImmLoc, "immediate shift value out of range");
1375 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1376 ShiftReg = tryParseRegister();
1377 SMLoc L = Parser.getTok().getLoc();
1378 if (ShiftReg == -1) {
1379 Error (L, "expected immediate or register in shift operand");
1383 Error (Parser.getTok().getLoc(),
1384 "expected immediate or register in shift operand");
1389 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1390 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1392 S, Parser.getTok().getLoc()));
1394 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1395 S, Parser.getTok().getLoc()));
1401 /// Try to parse a register name. The token must be an Identifier when called.
1402 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1403 /// if there is a "writeback". 'true' if it's not a register.
1405 /// TODO this is likely to change to allow different register types and or to
1406 /// parse for a specific register type.
1408 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1409 SMLoc S = Parser.getTok().getLoc();
1410 int RegNo = tryParseRegister();
1414 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1416 const AsmToken &ExclaimTok = Parser.getTok();
1417 if (ExclaimTok.is(AsmToken::Exclaim)) {
1418 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1419 ExclaimTok.getLoc()));
1420 Parser.Lex(); // Eat exclaim token
1426 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1427 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1429 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1430 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1432 switch (Name.size()) {
1435 if (Name[0] != CoprocOp)
1452 if (Name[0] != CoprocOp || Name[1] != '1')
1456 case '0': return 10;
1457 case '1': return 11;
1458 case '2': return 12;
1459 case '3': return 13;
1460 case '4': return 14;
1461 case '5': return 15;
1469 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1470 /// token must be an Identifier when called, and if it is a coprocessor
1471 /// number, the token is eaten and the operand is added to the operand list.
1472 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1473 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1474 SMLoc S = Parser.getTok().getLoc();
1475 const AsmToken &Tok = Parser.getTok();
1476 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1478 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1480 return MatchOperand_NoMatch;
1482 Parser.Lex(); // Eat identifier token.
1483 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1484 return MatchOperand_Success;
1487 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1488 /// token must be an Identifier when called, and if it is a coprocessor
1489 /// number, the token is eaten and the operand is added to the operand list.
1490 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1491 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1492 SMLoc S = Parser.getTok().getLoc();
1493 const AsmToken &Tok = Parser.getTok();
1494 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1496 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1498 return MatchOperand_NoMatch;
1500 Parser.Lex(); // Eat identifier token.
1501 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1502 return MatchOperand_Success;
1505 /// Parse a register list, return it if successful else return null. The first
1506 /// token must be a '{' when called.
1508 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1509 assert(Parser.getTok().is(AsmToken::LCurly) &&
1510 "Token is not a Left Curly Brace");
1511 SMLoc S = Parser.getTok().getLoc();
1513 // Read the rest of the registers in the list.
1514 unsigned PrevRegNum = 0;
1515 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1518 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1519 Parser.Lex(); // Eat non-identifier token.
1521 const AsmToken &RegTok = Parser.getTok();
1522 SMLoc RegLoc = RegTok.getLoc();
1523 if (RegTok.isNot(AsmToken::Identifier)) {
1524 Error(RegLoc, "register expected");
1528 int RegNum = tryParseRegister();
1530 Error(RegLoc, "register expected");
1535 int Reg = PrevRegNum;
1538 Registers.push_back(std::make_pair(Reg, RegLoc));
1539 } while (Reg != RegNum);
1541 Registers.push_back(std::make_pair(RegNum, RegLoc));
1544 PrevRegNum = RegNum;
1545 } while (Parser.getTok().is(AsmToken::Comma) ||
1546 Parser.getTok().is(AsmToken::Minus));
1548 // Process the right curly brace of the list.
1549 const AsmToken &RCurlyTok = Parser.getTok();
1550 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1551 Error(RCurlyTok.getLoc(), "'}' expected");
1555 SMLoc E = RCurlyTok.getLoc();
1556 Parser.Lex(); // Eat right curly brace token.
1558 // Verify the register list.
1559 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1560 RI = Registers.begin(), RE = Registers.end();
1562 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1563 bool EmittedWarning = false;
1565 DenseMap<unsigned, bool> RegMap;
1566 RegMap[HighRegNum] = true;
1568 for (++RI; RI != RE; ++RI) {
1569 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1570 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1573 Error(RegInfo.second, "register duplicated in register list");
1577 if (!EmittedWarning && Reg < HighRegNum)
1578 Warning(RegInfo.second,
1579 "register not in ascending order in register list");
1582 HighRegNum = std::max(Reg, HighRegNum);
1585 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1589 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1590 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1591 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1592 SMLoc S = Parser.getTok().getLoc();
1593 const AsmToken &Tok = Parser.getTok();
1594 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1595 StringRef OptStr = Tok.getString();
1597 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1598 .Case("sy", ARM_MB::SY)
1599 .Case("st", ARM_MB::ST)
1600 .Case("sh", ARM_MB::ISH)
1601 .Case("ish", ARM_MB::ISH)
1602 .Case("shst", ARM_MB::ISHST)
1603 .Case("ishst", ARM_MB::ISHST)
1604 .Case("nsh", ARM_MB::NSH)
1605 .Case("un", ARM_MB::NSH)
1606 .Case("nshst", ARM_MB::NSHST)
1607 .Case("unst", ARM_MB::NSHST)
1608 .Case("osh", ARM_MB::OSH)
1609 .Case("oshst", ARM_MB::OSHST)
1613 return MatchOperand_NoMatch;
1615 Parser.Lex(); // Eat identifier token.
1616 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1617 return MatchOperand_Success;
1620 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1621 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1622 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1623 SMLoc S = Parser.getTok().getLoc();
1624 const AsmToken &Tok = Parser.getTok();
1625 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1626 StringRef IFlagsStr = Tok.getString();
1628 unsigned IFlags = 0;
1629 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1630 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1631 .Case("a", ARM_PROC::A)
1632 .Case("i", ARM_PROC::I)
1633 .Case("f", ARM_PROC::F)
1636 // If some specific iflag is already set, it means that some letter is
1637 // present more than once, this is not acceptable.
1638 if (Flag == ~0U || (IFlags & Flag))
1639 return MatchOperand_NoMatch;
1644 Parser.Lex(); // Eat identifier token.
1645 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1646 return MatchOperand_Success;
1649 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1650 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1651 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1652 SMLoc S = Parser.getTok().getLoc();
1653 const AsmToken &Tok = Parser.getTok();
1654 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1655 StringRef Mask = Tok.getString();
1657 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1658 size_t Start = 0, Next = Mask.find('_');
1659 StringRef Flags = "";
1660 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1661 if (Next != StringRef::npos)
1662 Flags = Mask.slice(Next+1, Mask.size());
1664 // FlagsVal contains the complete mask:
1666 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1667 unsigned FlagsVal = 0;
1669 if (SpecReg == "apsr") {
1670 FlagsVal = StringSwitch<unsigned>(Flags)
1671 .Case("nzcvq", 0x8) // same as CPSR_f
1672 .Case("g", 0x4) // same as CPSR_s
1673 .Case("nzcvqg", 0xc) // same as CPSR_fs
1676 if (FlagsVal == ~0U) {
1678 return MatchOperand_NoMatch;
1680 FlagsVal = 0; // No flag
1682 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1683 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1685 for (int i = 0, e = Flags.size(); i != e; ++i) {
1686 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1693 // If some specific flag is already set, it means that some letter is
1694 // present more than once, this is not acceptable.
1695 if (FlagsVal == ~0U || (FlagsVal & Flag))
1696 return MatchOperand_NoMatch;
1699 } else // No match for special register.
1700 return MatchOperand_NoMatch;
1702 // Special register without flags are equivalent to "fc" flags.
1706 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1707 if (SpecReg == "spsr")
1710 Parser.Lex(); // Eat identifier token.
1711 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1712 return MatchOperand_Success;
1715 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1716 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1717 int Low, int High) {
1718 const AsmToken &Tok = Parser.getTok();
1719 if (Tok.isNot(AsmToken::Identifier)) {
1720 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1721 return MatchOperand_ParseFail;
1723 StringRef ShiftName = Tok.getString();
1724 std::string LowerOp = LowercaseString(Op);
1725 std::string UpperOp = UppercaseString(Op);
1726 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1727 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1728 return MatchOperand_ParseFail;
1730 Parser.Lex(); // Eat shift type token.
1732 // There must be a '#' and a shift amount.
1733 if (Parser.getTok().isNot(AsmToken::Hash)) {
1734 Error(Parser.getTok().getLoc(), "'#' expected");
1735 return MatchOperand_ParseFail;
1737 Parser.Lex(); // Eat hash token.
1739 const MCExpr *ShiftAmount;
1740 SMLoc Loc = Parser.getTok().getLoc();
1741 if (getParser().ParseExpression(ShiftAmount)) {
1742 Error(Loc, "illegal expression");
1743 return MatchOperand_ParseFail;
1745 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1747 Error(Loc, "constant expression expected");
1748 return MatchOperand_ParseFail;
1750 int Val = CE->getValue();
1751 if (Val < Low || Val > High) {
1752 Error(Loc, "immediate value out of range");
1753 return MatchOperand_ParseFail;
1756 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1758 return MatchOperand_Success;
1761 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1762 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1763 const AsmToken &Tok = Parser.getTok();
1764 SMLoc S = Tok.getLoc();
1765 if (Tok.isNot(AsmToken::Identifier)) {
1766 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1767 return MatchOperand_ParseFail;
1769 int Val = StringSwitch<int>(Tok.getString())
1773 Parser.Lex(); // Eat the token.
1776 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1777 return MatchOperand_ParseFail;
1779 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1781 S, Parser.getTok().getLoc()));
1782 return MatchOperand_Success;
1785 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1786 /// instructions. Legal values are:
1787 /// lsl #n 'n' in [0,31]
1788 /// asr #n 'n' in [1,32]
1789 /// n == 32 encoded as n == 0.
1790 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1791 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1792 const AsmToken &Tok = Parser.getTok();
1793 SMLoc S = Tok.getLoc();
1794 if (Tok.isNot(AsmToken::Identifier)) {
1795 Error(S, "shift operator 'asr' or 'lsl' expected");
1796 return MatchOperand_ParseFail;
1798 StringRef ShiftName = Tok.getString();
1800 if (ShiftName == "lsl" || ShiftName == "LSL")
1802 else if (ShiftName == "asr" || ShiftName == "ASR")
1805 Error(S, "shift operator 'asr' or 'lsl' expected");
1806 return MatchOperand_ParseFail;
1808 Parser.Lex(); // Eat the operator.
1810 // A '#' and a shift amount.
1811 if (Parser.getTok().isNot(AsmToken::Hash)) {
1812 Error(Parser.getTok().getLoc(), "'#' expected");
1813 return MatchOperand_ParseFail;
1815 Parser.Lex(); // Eat hash token.
1817 const MCExpr *ShiftAmount;
1818 SMLoc E = Parser.getTok().getLoc();
1819 if (getParser().ParseExpression(ShiftAmount)) {
1820 Error(E, "malformed shift expression");
1821 return MatchOperand_ParseFail;
1823 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1825 Error(E, "shift amount must be an immediate");
1826 return MatchOperand_ParseFail;
1829 int64_t Val = CE->getValue();
1831 // Shift amount must be in [1,32]
1832 if (Val < 1 || Val > 32) {
1833 Error(E, "'asr' shift amount must be in range [1,32]");
1834 return MatchOperand_ParseFail;
1836 // asr #32 encoded as asr #0.
1837 if (Val == 32) Val = 0;
1839 // Shift amount must be in [1,32]
1840 if (Val < 0 || Val > 31) {
1841 Error(E, "'lsr' shift amount must be in range [0,31]");
1842 return MatchOperand_ParseFail;
1846 E = Parser.getTok().getLoc();
1847 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1849 return MatchOperand_Success;
1852 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1853 /// of instructions. Legal values are:
1854 /// ror #n 'n' in {0, 8, 16, 24}
1855 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1856 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1857 const AsmToken &Tok = Parser.getTok();
1858 SMLoc S = Tok.getLoc();
1859 if (Tok.isNot(AsmToken::Identifier)) {
1860 Error(S, "rotate operator 'ror' expected");
1861 return MatchOperand_ParseFail;
1863 StringRef ShiftName = Tok.getString();
1864 if (ShiftName != "ror" && ShiftName != "ROR") {
1865 Error(S, "rotate operator 'ror' expected");
1866 return MatchOperand_ParseFail;
1868 Parser.Lex(); // Eat the operator.
1870 // A '#' and a rotate amount.
1871 if (Parser.getTok().isNot(AsmToken::Hash)) {
1872 Error(Parser.getTok().getLoc(), "'#' expected");
1873 return MatchOperand_ParseFail;
1875 Parser.Lex(); // Eat hash token.
1877 const MCExpr *ShiftAmount;
1878 SMLoc E = Parser.getTok().getLoc();
1879 if (getParser().ParseExpression(ShiftAmount)) {
1880 Error(E, "malformed rotate expression");
1881 return MatchOperand_ParseFail;
1883 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1885 Error(E, "rotate amount must be an immediate");
1886 return MatchOperand_ParseFail;
1889 int64_t Val = CE->getValue();
1890 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1891 // normally, zero is represented in asm by omitting the rotate operand
1893 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1894 Error(E, "'ror' rotate amount must be 8, 16, or 24");
1895 return MatchOperand_ParseFail;
1898 E = Parser.getTok().getLoc();
1899 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
1901 return MatchOperand_Success;
1904 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1905 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1906 SMLoc S = Parser.getTok().getLoc();
1907 // The bitfield descriptor is really two operands, the LSB and the width.
1908 if (Parser.getTok().isNot(AsmToken::Hash)) {
1909 Error(Parser.getTok().getLoc(), "'#' expected");
1910 return MatchOperand_ParseFail;
1912 Parser.Lex(); // Eat hash token.
1914 const MCExpr *LSBExpr;
1915 SMLoc E = Parser.getTok().getLoc();
1916 if (getParser().ParseExpression(LSBExpr)) {
1917 Error(E, "malformed immediate expression");
1918 return MatchOperand_ParseFail;
1920 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
1922 Error(E, "'lsb' operand must be an immediate");
1923 return MatchOperand_ParseFail;
1926 int64_t LSB = CE->getValue();
1927 // The LSB must be in the range [0,31]
1928 if (LSB < 0 || LSB > 31) {
1929 Error(E, "'lsb' operand must be in the range [0,31]");
1930 return MatchOperand_ParseFail;
1932 E = Parser.getTok().getLoc();
1934 // Expect another immediate operand.
1935 if (Parser.getTok().isNot(AsmToken::Comma)) {
1936 Error(Parser.getTok().getLoc(), "too few operands");
1937 return MatchOperand_ParseFail;
1939 Parser.Lex(); // Eat hash token.
1940 if (Parser.getTok().isNot(AsmToken::Hash)) {
1941 Error(Parser.getTok().getLoc(), "'#' expected");
1942 return MatchOperand_ParseFail;
1944 Parser.Lex(); // Eat hash token.
1946 const MCExpr *WidthExpr;
1947 if (getParser().ParseExpression(WidthExpr)) {
1948 Error(E, "malformed immediate expression");
1949 return MatchOperand_ParseFail;
1951 CE = dyn_cast<MCConstantExpr>(WidthExpr);
1953 Error(E, "'width' operand must be an immediate");
1954 return MatchOperand_ParseFail;
1957 int64_t Width = CE->getValue();
1958 // The LSB must be in the range [1,32-lsb]
1959 if (Width < 1 || Width > 32 - LSB) {
1960 Error(E, "'width' operand must be in the range [1,32-lsb]");
1961 return MatchOperand_ParseFail;
1963 E = Parser.getTok().getLoc();
1965 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
1967 return MatchOperand_Success;
1970 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1971 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1972 // Check for a post-index addressing register operand. Specifically:
1973 // postidx_reg := '+' register {, shift}
1974 // | '-' register {, shift}
1975 // | register {, shift}
1977 // This method must return MatchOperand_NoMatch without consuming any tokens
1978 // in the case where there is no match, as other alternatives take other
1980 AsmToken Tok = Parser.getTok();
1981 SMLoc S = Tok.getLoc();
1982 bool haveEaten = false;
1985 if (Tok.is(AsmToken::Plus)) {
1986 Parser.Lex(); // Eat the '+' token.
1988 } else if (Tok.is(AsmToken::Minus)) {
1989 Parser.Lex(); // Eat the '-' token.
1993 if (Parser.getTok().is(AsmToken::Identifier))
1994 Reg = tryParseRegister();
1997 return MatchOperand_NoMatch;
1998 Error(Parser.getTok().getLoc(), "register expected");
1999 return MatchOperand_ParseFail;
2001 SMLoc E = Parser.getTok().getLoc();
2003 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2004 unsigned ShiftImm = 0;
2005 if (Parser.getTok().is(AsmToken::Comma)) {
2006 Parser.Lex(); // Eat the ','.
2007 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2008 return MatchOperand_ParseFail;
2011 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2014 return MatchOperand_Success;
2017 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2018 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2019 // Check for a post-index addressing register operand. Specifically:
2020 // am3offset := '+' register
2027 // This method must return MatchOperand_NoMatch without consuming any tokens
2028 // in the case where there is no match, as other alternatives take other
2030 AsmToken Tok = Parser.getTok();
2031 SMLoc S = Tok.getLoc();
2033 // Do immediates first, as we always parse those if we have a '#'.
2034 if (Parser.getTok().is(AsmToken::Hash)) {
2035 Parser.Lex(); // Eat the '#'.
2036 // Explicitly look for a '-', as we need to encode negative zero
2038 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2039 const MCExpr *Offset;
2040 if (getParser().ParseExpression(Offset))
2041 return MatchOperand_ParseFail;
2042 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2044 Error(S, "constant expression expected");
2045 return MatchOperand_ParseFail;
2047 SMLoc E = Tok.getLoc();
2048 // Negative zero is encoded as the flag value INT32_MIN.
2049 int32_t Val = CE->getValue();
2050 if (isNegative && Val == 0)
2054 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2056 return MatchOperand_Success;
2060 bool haveEaten = false;
2063 if (Tok.is(AsmToken::Plus)) {
2064 Parser.Lex(); // Eat the '+' token.
2066 } else if (Tok.is(AsmToken::Minus)) {
2067 Parser.Lex(); // Eat the '-' token.
2071 if (Parser.getTok().is(AsmToken::Identifier))
2072 Reg = tryParseRegister();
2075 return MatchOperand_NoMatch;
2076 Error(Parser.getTok().getLoc(), "register expected");
2077 return MatchOperand_ParseFail;
2079 SMLoc E = Parser.getTok().getLoc();
2081 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2084 return MatchOperand_Success;
2087 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2088 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2089 /// when they refer multiple MIOperands inside a single one.
2091 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2092 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2093 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2095 // Create a writeback register dummy placeholder.
2096 Inst.addOperand(MCOperand::CreateImm(0));
2098 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2099 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2103 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2104 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2105 /// when they refer multiple MIOperands inside a single one.
2107 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2108 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2109 // Create a writeback register dummy placeholder.
2110 Inst.addOperand(MCOperand::CreateImm(0));
2111 assert(0 && "cvtStWriteBackRegAddrMode2 not implemented yet!");
2115 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2116 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2117 /// when they refer multiple MIOperands inside a single one.
2119 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2120 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2122 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2123 // Create a writeback register dummy placeholder.
2124 Inst.addOperand(MCOperand::CreateImm(0));
2126 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2128 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2130 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2134 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2135 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2136 /// when they refer multiple MIOperands inside a single one.
2138 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2139 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2141 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2142 // Create a writeback register dummy placeholder.
2143 Inst.addOperand(MCOperand::CreateImm(0));
2145 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2147 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2149 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2153 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2154 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2155 /// when they refer multiple MIOperands inside a single one.
2157 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2158 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2159 // Create a writeback register dummy placeholder.
2160 Inst.addOperand(MCOperand::CreateImm(0));
2162 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2164 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2166 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2168 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2172 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2173 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2174 /// when they refer multiple MIOperands inside a single one.
2176 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2177 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2178 // Create a writeback register dummy placeholder.
2179 Inst.addOperand(MCOperand::CreateImm(0));
2181 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2183 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2185 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2187 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2191 /// cvtLdrdPre - Convert parsed operands to MCInst.
2192 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2193 /// when they refer multiple MIOperands inside a single one.
2195 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2196 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2198 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2199 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2200 // Create a writeback register dummy placeholder.
2201 Inst.addOperand(MCOperand::CreateImm(0));
2203 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2205 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2209 /// cvtLdWriteBackRegAddrMode3 - 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 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2214 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2215 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2216 // Create a writeback register dummy placeholder.
2217 Inst.addOperand(MCOperand::CreateImm(0));
2218 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2219 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2224 /// Parse an ARM memory expression, return false if successful else return true
2225 /// or an error. The first token must be a '[' when called.
2227 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2229 assert(Parser.getTok().is(AsmToken::LBrac) &&
2230 "Token is not a Left Bracket");
2231 S = Parser.getTok().getLoc();
2232 Parser.Lex(); // Eat left bracket token.
2234 const AsmToken &BaseRegTok = Parser.getTok();
2235 int BaseRegNum = tryParseRegister();
2236 if (BaseRegNum == -1)
2237 return Error(BaseRegTok.getLoc(), "register expected");
2239 // The next token must either be a comma or a closing bracket.
2240 const AsmToken &Tok = Parser.getTok();
2241 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2242 return Error(Tok.getLoc(), "malformed memory operand");
2244 if (Tok.is(AsmToken::RBrac)) {
2246 Parser.Lex(); // Eat right bracket token.
2248 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2254 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2255 Parser.Lex(); // Eat the comma.
2257 // If we have a '#' it's an immediate offset, else assume it's a register
2259 if (Parser.getTok().is(AsmToken::Hash)) {
2260 Parser.Lex(); // Eat the '#'.
2261 E = Parser.getTok().getLoc();
2263 // FIXME: Special case #-0 so we can correctly set the U bit.
2265 const MCExpr *Offset;
2266 if (getParser().ParseExpression(Offset))
2269 // The expression has to be a constant. Memory references with relocations
2270 // don't come through here, as they use the <label> forms of the relevant
2272 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2274 return Error (E, "constant expression expected");
2276 // Now we should have the closing ']'
2277 E = Parser.getTok().getLoc();
2278 if (Parser.getTok().isNot(AsmToken::RBrac))
2279 return Error(E, "']' expected");
2280 Parser.Lex(); // Eat right bracket token.
2282 // Don't worry about range checking the value here. That's handled by
2283 // the is*() predicates.
2284 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2285 ARM_AM::no_shift, 0, false, S,E));
2287 // If there's a pre-indexing writeback marker, '!', just add it as a token
2289 if (Parser.getTok().is(AsmToken::Exclaim)) {
2290 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2291 Parser.Lex(); // Eat the '!'.
2297 // The register offset is optionally preceded by a '+' or '-'
2298 bool isNegative = false;
2299 if (Parser.getTok().is(AsmToken::Minus)) {
2301 Parser.Lex(); // Eat the '-'.
2302 } else if (Parser.getTok().is(AsmToken::Plus)) {
2304 Parser.Lex(); // Eat the '+'.
2307 E = Parser.getTok().getLoc();
2308 int OffsetRegNum = tryParseRegister();
2309 if (OffsetRegNum == -1)
2310 return Error(E, "register expected");
2312 // If there's a shift operator, handle it.
2313 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2314 unsigned ShiftImm = 0;
2315 if (Parser.getTok().is(AsmToken::Comma)) {
2316 Parser.Lex(); // Eat the ','.
2317 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2321 // Now we should have the closing ']'
2322 E = Parser.getTok().getLoc();
2323 if (Parser.getTok().isNot(AsmToken::RBrac))
2324 return Error(E, "']' expected");
2325 Parser.Lex(); // Eat right bracket token.
2327 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2328 ShiftType, ShiftImm, isNegative,
2331 // If there's a pre-indexing writeback marker, '!', just add it as a token
2333 if (Parser.getTok().is(AsmToken::Exclaim)) {
2334 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2335 Parser.Lex(); // Eat the '!'.
2341 /// parseMemRegOffsetShift - one of these two:
2342 /// ( lsl | lsr | asr | ror ) , # shift_amount
2344 /// return true if it parses a shift otherwise it returns false.
2345 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2347 SMLoc Loc = Parser.getTok().getLoc();
2348 const AsmToken &Tok = Parser.getTok();
2349 if (Tok.isNot(AsmToken::Identifier))
2351 StringRef ShiftName = Tok.getString();
2352 if (ShiftName == "lsl" || ShiftName == "LSL")
2354 else if (ShiftName == "lsr" || ShiftName == "LSR")
2356 else if (ShiftName == "asr" || ShiftName == "ASR")
2358 else if (ShiftName == "ror" || ShiftName == "ROR")
2360 else if (ShiftName == "rrx" || ShiftName == "RRX")
2363 return Error(Loc, "illegal shift operator");
2364 Parser.Lex(); // Eat shift type token.
2366 // rrx stands alone.
2368 if (St != ARM_AM::rrx) {
2369 Loc = Parser.getTok().getLoc();
2370 // A '#' and a shift amount.
2371 const AsmToken &HashTok = Parser.getTok();
2372 if (HashTok.isNot(AsmToken::Hash))
2373 return Error(HashTok.getLoc(), "'#' expected");
2374 Parser.Lex(); // Eat hash token.
2377 if (getParser().ParseExpression(Expr))
2379 // Range check the immediate.
2380 // lsl, ror: 0 <= imm <= 31
2381 // lsr, asr: 0 <= imm <= 32
2382 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2384 return Error(Loc, "shift amount must be an immediate");
2385 int64_t Imm = CE->getValue();
2387 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2388 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2389 return Error(Loc, "immediate shift value out of range");
2396 /// Parse a arm instruction operand. For now this parses the operand regardless
2397 /// of the mnemonic.
2398 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2399 StringRef Mnemonic) {
2402 // Check if the current operand has a custom associated parser, if so, try to
2403 // custom parse the operand, or fallback to the general approach.
2404 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2405 if (ResTy == MatchOperand_Success)
2407 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2408 // there was a match, but an error occurred, in which case, just return that
2409 // the operand parsing failed.
2410 if (ResTy == MatchOperand_ParseFail)
2413 switch (getLexer().getKind()) {
2415 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2417 case AsmToken::Identifier: {
2418 if (!tryParseRegisterWithWriteBack(Operands))
2420 int Res = tryParseShiftRegister(Operands);
2421 if (Res == 0) // success
2423 else if (Res == -1) // irrecoverable error
2426 // Fall though for the Identifier case that is not a register or a
2429 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2430 case AsmToken::Dot: { // . as a branch target
2431 // This was not a register so parse other operands that start with an
2432 // identifier (like labels) as expressions and create them as immediates.
2433 const MCExpr *IdVal;
2434 S = Parser.getTok().getLoc();
2435 if (getParser().ParseExpression(IdVal))
2437 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2438 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2441 case AsmToken::LBrac:
2442 return parseMemory(Operands);
2443 case AsmToken::LCurly:
2444 return parseRegisterList(Operands);
2445 case AsmToken::Hash:
2446 // #42 -> immediate.
2447 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2448 S = Parser.getTok().getLoc();
2450 const MCExpr *ImmVal;
2451 if (getParser().ParseExpression(ImmVal))
2453 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2454 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2456 case AsmToken::Colon: {
2457 // ":lower16:" and ":upper16:" expression prefixes
2458 // FIXME: Check it's an expression prefix,
2459 // e.g. (FOO - :lower16:BAR) isn't legal.
2460 ARMMCExpr::VariantKind RefKind;
2461 if (parsePrefix(RefKind))
2464 const MCExpr *SubExprVal;
2465 if (getParser().ParseExpression(SubExprVal))
2468 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2470 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2471 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2477 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2478 // :lower16: and :upper16:.
2479 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2480 RefKind = ARMMCExpr::VK_ARM_None;
2482 // :lower16: and :upper16: modifiers
2483 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2484 Parser.Lex(); // Eat ':'
2486 if (getLexer().isNot(AsmToken::Identifier)) {
2487 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2491 StringRef IDVal = Parser.getTok().getIdentifier();
2492 if (IDVal == "lower16") {
2493 RefKind = ARMMCExpr::VK_ARM_LO16;
2494 } else if (IDVal == "upper16") {
2495 RefKind = ARMMCExpr::VK_ARM_HI16;
2497 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2502 if (getLexer().isNot(AsmToken::Colon)) {
2503 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2506 Parser.Lex(); // Eat the last ':'
2511 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2512 MCSymbolRefExpr::VariantKind Variant) {
2513 // Recurse over the given expression, rebuilding it to apply the given variant
2514 // to the leftmost symbol.
2515 if (Variant == MCSymbolRefExpr::VK_None)
2518 switch (E->getKind()) {
2519 case MCExpr::Target:
2520 llvm_unreachable("Can't handle target expr yet");
2521 case MCExpr::Constant:
2522 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2524 case MCExpr::SymbolRef: {
2525 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2527 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2530 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2534 llvm_unreachable("Can't handle unary expressions yet");
2536 case MCExpr::Binary: {
2537 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2538 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2539 const MCExpr *RHS = BE->getRHS();
2543 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2547 assert(0 && "Invalid expression kind!");
2551 /// \brief Given a mnemonic, split out possible predication code and carry
2552 /// setting letters to form a canonical mnemonic and flags.
2554 // FIXME: Would be nice to autogen this.
2555 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2556 unsigned &PredicationCode,
2558 unsigned &ProcessorIMod) {
2559 PredicationCode = ARMCC::AL;
2560 CarrySetting = false;
2563 // Ignore some mnemonics we know aren't predicated forms.
2565 // FIXME: Would be nice to autogen this.
2566 if ((Mnemonic == "movs" && isThumb()) ||
2567 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2568 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2569 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2570 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2571 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2572 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2573 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2576 // First, split out any predication code. Ignore mnemonics we know aren't
2577 // predicated but do have a carry-set and so weren't caught above.
2578 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2579 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2580 Mnemonic != "umlals" && Mnemonic != "umulls") {
2581 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2582 .Case("eq", ARMCC::EQ)
2583 .Case("ne", ARMCC::NE)
2584 .Case("hs", ARMCC::HS)
2585 .Case("cs", ARMCC::HS)
2586 .Case("lo", ARMCC::LO)
2587 .Case("cc", ARMCC::LO)
2588 .Case("mi", ARMCC::MI)
2589 .Case("pl", ARMCC::PL)
2590 .Case("vs", ARMCC::VS)
2591 .Case("vc", ARMCC::VC)
2592 .Case("hi", ARMCC::HI)
2593 .Case("ls", ARMCC::LS)
2594 .Case("ge", ARMCC::GE)
2595 .Case("lt", ARMCC::LT)
2596 .Case("gt", ARMCC::GT)
2597 .Case("le", ARMCC::LE)
2598 .Case("al", ARMCC::AL)
2601 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2602 PredicationCode = CC;
2606 // Next, determine if we have a carry setting bit. We explicitly ignore all
2607 // the instructions we know end in 's'.
2608 if (Mnemonic.endswith("s") &&
2609 !(Mnemonic == "asrs" || Mnemonic == "cps" || Mnemonic == "mls" ||
2610 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2611 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2612 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2613 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2614 (Mnemonic == "movs" && isThumb()))) {
2615 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2616 CarrySetting = true;
2619 // The "cps" instruction can have a interrupt mode operand which is glued into
2620 // the mnemonic. Check if this is the case, split it and parse the imod op
2621 if (Mnemonic.startswith("cps")) {
2622 // Split out any imod code.
2624 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2625 .Case("ie", ARM_PROC::IE)
2626 .Case("id", ARM_PROC::ID)
2629 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2630 ProcessorIMod = IMod;
2637 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2638 /// inclusion of carry set or predication code operands.
2640 // FIXME: It would be nice to autogen this.
2642 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2643 bool &CanAcceptPredicationCode) {
2644 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2645 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2646 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2647 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2648 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2649 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2650 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2651 Mnemonic == "eor" || Mnemonic == "smlal" ||
2652 (Mnemonic == "mov" && !isThumbOne())) {
2653 CanAcceptCarrySet = true;
2655 CanAcceptCarrySet = false;
2658 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2659 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2660 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2661 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2662 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2663 Mnemonic == "setend" ||
2664 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2665 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2667 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2668 CanAcceptPredicationCode = false;
2670 CanAcceptPredicationCode = true;
2674 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2675 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2676 CanAcceptPredicationCode = false;
2679 /// Parse an arm instruction mnemonic followed by its operands.
2680 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2681 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2682 // Create the leading tokens for the mnemonic, split by '.' characters.
2683 size_t Start = 0, Next = Name.find('.');
2684 StringRef Mnemonic = Name.slice(Start, Next);
2686 // Split out the predication code and carry setting flag from the mnemonic.
2687 unsigned PredicationCode;
2688 unsigned ProcessorIMod;
2690 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2693 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2695 // FIXME: This is all a pretty gross hack. We should automatically handle
2696 // optional operands like this via tblgen.
2698 // Next, add the CCOut and ConditionCode operands, if needed.
2700 // For mnemonics which can ever incorporate a carry setting bit or predication
2701 // code, our matching model involves us always generating CCOut and
2702 // ConditionCode operands to match the mnemonic "as written" and then we let
2703 // the matcher deal with finding the right instruction or generating an
2704 // appropriate error.
2705 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2706 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2708 // If we had a carry-set on an instruction that can't do that, issue an
2710 if (!CanAcceptCarrySet && CarrySetting) {
2711 Parser.EatToEndOfStatement();
2712 return Error(NameLoc, "instruction '" + Mnemonic +
2713 "' can not set flags, but 's' suffix specified");
2715 // If we had a predication code on an instruction that can't do that, issue an
2717 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2718 Parser.EatToEndOfStatement();
2719 return Error(NameLoc, "instruction '" + Mnemonic +
2720 "' is not predicable, but condition code specified");
2723 // Add the carry setting operand, if necessary.
2725 // FIXME: It would be awesome if we could somehow invent a location such that
2726 // match errors on this operand would print a nice diagnostic about how the
2727 // 's' character in the mnemonic resulted in a CCOut operand.
2728 if (CanAcceptCarrySet)
2729 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2732 // Add the predication code operand, if necessary.
2733 if (CanAcceptPredicationCode) {
2734 Operands.push_back(ARMOperand::CreateCondCode(
2735 ARMCC::CondCodes(PredicationCode), NameLoc));
2738 // Add the processor imod operand, if necessary.
2739 if (ProcessorIMod) {
2740 Operands.push_back(ARMOperand::CreateImm(
2741 MCConstantExpr::Create(ProcessorIMod, getContext()),
2744 // This mnemonic can't ever accept a imod, but the user wrote
2745 // one (or misspelled another mnemonic).
2747 // FIXME: Issue a nice error.
2750 // Add the remaining tokens in the mnemonic.
2751 while (Next != StringRef::npos) {
2753 Next = Name.find('.', Start + 1);
2754 StringRef ExtraToken = Name.slice(Start, Next);
2756 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2759 // Read the remaining operands.
2760 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2761 // Read the first operand.
2762 if (parseOperand(Operands, Mnemonic)) {
2763 Parser.EatToEndOfStatement();
2767 while (getLexer().is(AsmToken::Comma)) {
2768 Parser.Lex(); // Eat the comma.
2770 // Parse and remember the operand.
2771 if (parseOperand(Operands, Mnemonic)) {
2772 Parser.EatToEndOfStatement();
2778 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2779 Parser.EatToEndOfStatement();
2780 return TokError("unexpected token in argument list");
2783 Parser.Lex(); // Consume the EndOfStatement
2786 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2787 // another does not. Specifically, the MOVW instruction does not. So we
2788 // special case it here and remove the defaulted (non-setting) cc_out
2789 // operand if that's the instruction we're trying to match.
2791 // We do this post-processing of the explicit operands rather than just
2792 // conditionally adding the cc_out in the first place because we need
2793 // to check the type of the parsed immediate operand.
2794 if (Mnemonic == "mov" && Operands.size() > 4 &&
2795 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2796 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2797 static_cast<ARMOperand*>(Operands[1])->getReg() == 0) {
2798 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2799 Operands.erase(Operands.begin() + 1);
2803 // ARM mode 'blx' need special handling, as the register operand version
2804 // is predicable, but the label operand version is not. So, we can't rely
2805 // on the Mnemonic based checking to correctly figure out when to put
2806 // a CondCode operand in the list. If we're trying to match the label
2807 // version, remove the CondCode operand here.
2808 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
2809 static_cast<ARMOperand*>(Operands[2])->isImm()) {
2810 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
2811 Operands.erase(Operands.begin() + 1);
2817 // Validate context-sensitive operand constraints.
2818 // FIXME: We would really like to be able to tablegen'erate this.
2820 validateInstruction(MCInst &Inst,
2821 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2822 switch (Inst.getOpcode()) {
2825 case ARM::LDRD_POST:
2827 // Rt2 must be Rt + 1.
2828 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
2829 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2831 return Error(Operands[3]->getStartLoc(),
2832 "destination operands must be sequential");
2837 case ARM::STRD_POST:
2839 // Rt2 must be Rt + 1.
2840 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
2841 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
2843 return Error(Operands[4]->getStartLoc(),
2844 "source operands must be sequential");
2849 // width must be in range [1, 32-lsb]
2850 unsigned lsb = Inst.getOperand(2).getImm();
2851 unsigned widthm1 = Inst.getOperand(3).getImm();
2852 if (widthm1 >= 32 - lsb)
2853 return Error(Operands[5]->getStartLoc(),
2854 "bitfield width must be in range [1,32-lsb]");
2862 processInstruction(MCInst &Inst,
2863 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2864 switch (Inst.getOpcode()) {
2865 case ARM::LDMIA_UPD:
2866 // If this is a load of a single register via a 'pop', then we should use
2867 // a post-indexed LDR instruction instead, per the ARM ARM.
2868 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
2869 Inst.getNumOperands() == 5) {
2871 TmpInst.setOpcode(ARM::LDR_POST_IMM);
2872 TmpInst.addOperand(Inst.getOperand(4)); // Rt
2873 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
2874 TmpInst.addOperand(Inst.getOperand(1)); // Rn
2875 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
2876 TmpInst.addOperand(MCOperand::CreateImm(4));
2877 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
2878 TmpInst.addOperand(Inst.getOperand(3));
2882 case ARM::STMDB_UPD:
2883 // If this is a store of a single register via a 'push', then we should use
2884 // a pre-indexed STR instruction instead, per the ARM ARM.
2885 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
2886 Inst.getNumOperands() == 5) {
2888 TmpInst.setOpcode(ARM::STR_PRE_IMM);
2889 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
2890 TmpInst.addOperand(Inst.getOperand(4)); // Rt
2891 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
2892 TmpInst.addOperand(MCOperand::CreateImm(-4));
2893 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
2894 TmpInst.addOperand(Inst.getOperand(3));
2902 MatchAndEmitInstruction(SMLoc IDLoc,
2903 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2907 MatchResultTy MatchResult;
2908 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
2909 switch (MatchResult) {
2911 // Context sensitive operand constraints aren't handled by the matcher,
2912 // so check them here.
2913 if (validateInstruction(Inst, Operands))
2916 // Some instructions need post-processing to, for example, tweak which
2917 // encoding is selected.
2918 processInstruction(Inst, Operands);
2920 Out.EmitInstruction(Inst);
2922 case Match_MissingFeature:
2923 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
2925 case Match_InvalidOperand: {
2926 SMLoc ErrorLoc = IDLoc;
2927 if (ErrorInfo != ~0U) {
2928 if (ErrorInfo >= Operands.size())
2929 return Error(IDLoc, "too few operands for instruction");
2931 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
2932 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
2935 return Error(ErrorLoc, "invalid operand for instruction");
2937 case Match_MnemonicFail:
2938 return Error(IDLoc, "unrecognized instruction mnemonic");
2939 case Match_ConversionFail:
2940 return Error(IDLoc, "unable to convert operands to instruction");
2943 llvm_unreachable("Implement any new match types added!");
2947 /// parseDirective parses the arm specific directives
2948 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
2949 StringRef IDVal = DirectiveID.getIdentifier();
2950 if (IDVal == ".word")
2951 return parseDirectiveWord(4, DirectiveID.getLoc());
2952 else if (IDVal == ".thumb")
2953 return parseDirectiveThumb(DirectiveID.getLoc());
2954 else if (IDVal == ".thumb_func")
2955 return parseDirectiveThumbFunc(DirectiveID.getLoc());
2956 else if (IDVal == ".code")
2957 return parseDirectiveCode(DirectiveID.getLoc());
2958 else if (IDVal == ".syntax")
2959 return parseDirectiveSyntax(DirectiveID.getLoc());
2963 /// parseDirectiveWord
2964 /// ::= .word [ expression (, expression)* ]
2965 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
2966 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2968 const MCExpr *Value;
2969 if (getParser().ParseExpression(Value))
2972 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
2974 if (getLexer().is(AsmToken::EndOfStatement))
2977 // FIXME: Improve diagnostic.
2978 if (getLexer().isNot(AsmToken::Comma))
2979 return Error(L, "unexpected token in directive");
2988 /// parseDirectiveThumb
2990 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
2991 if (getLexer().isNot(AsmToken::EndOfStatement))
2992 return Error(L, "unexpected token in directive");
2995 // TODO: set thumb mode
2996 // TODO: tell the MC streamer the mode
2997 // getParser().getStreamer().Emit???();
3001 /// parseDirectiveThumbFunc
3002 /// ::= .thumbfunc symbol_name
3003 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3004 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3005 bool isMachO = MAI.hasSubsectionsViaSymbols();
3008 // Darwin asm has function name after .thumb_func direction
3011 const AsmToken &Tok = Parser.getTok();
3012 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3013 return Error(L, "unexpected token in .thumb_func directive");
3014 Name = Tok.getString();
3015 Parser.Lex(); // Consume the identifier token.
3018 if (getLexer().isNot(AsmToken::EndOfStatement))
3019 return Error(L, "unexpected token in directive");
3022 // FIXME: assuming function name will be the line following .thumb_func
3024 Name = Parser.getTok().getString();
3027 // Mark symbol as a thumb symbol.
3028 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3029 getParser().getStreamer().EmitThumbFunc(Func);
3033 /// parseDirectiveSyntax
3034 /// ::= .syntax unified | divided
3035 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3036 const AsmToken &Tok = Parser.getTok();
3037 if (Tok.isNot(AsmToken::Identifier))
3038 return Error(L, "unexpected token in .syntax directive");
3039 StringRef Mode = Tok.getString();
3040 if (Mode == "unified" || Mode == "UNIFIED")
3042 else if (Mode == "divided" || Mode == "DIVIDED")
3043 return Error(L, "'.syntax divided' arm asssembly not supported");
3045 return Error(L, "unrecognized syntax mode in .syntax directive");
3047 if (getLexer().isNot(AsmToken::EndOfStatement))
3048 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3051 // TODO tell the MC streamer the mode
3052 // getParser().getStreamer().Emit???();
3056 /// parseDirectiveCode
3057 /// ::= .code 16 | 32
3058 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3059 const AsmToken &Tok = Parser.getTok();
3060 if (Tok.isNot(AsmToken::Integer))
3061 return Error(L, "unexpected token in .code directive");
3062 int64_t Val = Parser.getTok().getIntVal();
3068 return Error(L, "invalid operand to .code directive");
3070 if (getLexer().isNot(AsmToken::EndOfStatement))
3071 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3077 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3082 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3089 extern "C" void LLVMInitializeARMAsmLexer();
3091 /// Force static initialization.
3092 extern "C" void LLVMInitializeARMAsmParser() {
3093 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3094 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3095 LLVMInitializeARMAsmLexer();
3098 #define GET_REGISTER_MATCHER
3099 #define GET_MATCHER_IMPLEMENTATION
3100 #include "ARMGenAsmMatcher.inc"