1 //===-- ARMAsmParser.cpp - Parse ARM assembly to MCInst instructions ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/ARMBaseInfo.h"
11 #include "MCTargetDesc/ARMAddressingModes.h"
12 #include "MCTargetDesc/ARMMCExpr.h"
13 #include "llvm/MC/MCParser/MCAsmLexer.h"
14 #include "llvm/MC/MCParser/MCAsmParser.h"
15 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
16 #include "llvm/MC/MCAsmInfo.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCStreamer.h"
19 #include "llvm/MC/MCExpr.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/MC/MCTargetAsmParser.h"
24 #include "llvm/Target/TargetRegistry.h"
25 #include "llvm/Support/SourceMgr.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include "llvm/ADT/OwningPtr.h"
28 #include "llvm/ADT/STLExtras.h"
29 #include "llvm/ADT/SmallVector.h"
30 #include "llvm/ADT/StringExtras.h"
31 #include "llvm/ADT/StringSwitch.h"
32 #include "llvm/ADT/Twine.h"
40 class ARMAsmParser : public MCTargetAsmParser {
44 MCAsmParser &getParser() const { return Parser; }
45 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
47 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
48 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
50 int tryParseRegister();
51 bool tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &);
52 int tryParseShiftRegister(SmallVectorImpl<MCParsedAsmOperand*> &);
53 bool parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &);
54 bool parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &);
55 bool parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &, StringRef Mnemonic);
56 bool parsePrefix(ARMMCExpr::VariantKind &RefKind);
57 const MCExpr *applyPrefixToExpr(const MCExpr *E,
58 MCSymbolRefExpr::VariantKind Variant);
61 bool parseMemRegOffsetShift(ARM_AM::ShiftOpc &ShiftType,
62 unsigned &ShiftAmount);
63 bool parseDirectiveWord(unsigned Size, SMLoc L);
64 bool parseDirectiveThumb(SMLoc L);
65 bool parseDirectiveThumbFunc(SMLoc L);
66 bool parseDirectiveCode(SMLoc L);
67 bool parseDirectiveSyntax(SMLoc L);
69 StringRef splitMnemonic(StringRef Mnemonic, unsigned &PredicationCode,
70 bool &CarrySetting, unsigned &ProcessorIMod);
71 void getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
72 bool &CanAcceptPredicationCode);
74 bool isThumb() const {
75 // FIXME: Can tablegen auto-generate this?
76 return (STI.getFeatureBits() & ARM::ModeThumb) != 0;
78 bool isThumbOne() const {
79 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2) == 0;
81 bool isThumbTwo() const {
82 return isThumb() && (STI.getFeatureBits() & ARM::FeatureThumb2);
84 bool hasV6Ops() const {
85 return STI.getFeatureBits() & ARM::HasV6Ops;
88 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(ARM::ModeThumb));
89 setAvailableFeatures(FB);
92 /// @name Auto-generated Match Functions
95 #define GET_ASSEMBLER_HEADER
96 #include "ARMGenAsmMatcher.inc"
100 OperandMatchResultTy parseCoprocNumOperand(
101 SmallVectorImpl<MCParsedAsmOperand*>&);
102 OperandMatchResultTy parseCoprocRegOperand(
103 SmallVectorImpl<MCParsedAsmOperand*>&);
104 OperandMatchResultTy parseMemBarrierOptOperand(
105 SmallVectorImpl<MCParsedAsmOperand*>&);
106 OperandMatchResultTy parseProcIFlagsOperand(
107 SmallVectorImpl<MCParsedAsmOperand*>&);
108 OperandMatchResultTy parseMSRMaskOperand(
109 SmallVectorImpl<MCParsedAsmOperand*>&);
110 OperandMatchResultTy parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &O,
111 StringRef Op, int Low, int High);
112 OperandMatchResultTy parsePKHLSLImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
113 return parsePKHImm(O, "lsl", 0, 31);
115 OperandMatchResultTy parsePKHASRImm(SmallVectorImpl<MCParsedAsmOperand*> &O) {
116 return parsePKHImm(O, "asr", 1, 32);
118 OperandMatchResultTy parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*>&);
119 OperandMatchResultTy parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*>&);
120 OperandMatchResultTy parseRotImm(SmallVectorImpl<MCParsedAsmOperand*>&);
121 OperandMatchResultTy parseBitfield(SmallVectorImpl<MCParsedAsmOperand*>&);
122 OperandMatchResultTy parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*>&);
123 OperandMatchResultTy parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*>&);
125 // Asm Match Converter Methods
126 bool cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
127 const SmallVectorImpl<MCParsedAsmOperand*> &);
128 bool cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
129 const SmallVectorImpl<MCParsedAsmOperand*> &);
130 bool cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
131 const SmallVectorImpl<MCParsedAsmOperand*> &);
132 bool cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
133 const SmallVectorImpl<MCParsedAsmOperand*> &);
134 bool cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
135 const SmallVectorImpl<MCParsedAsmOperand*> &);
136 bool cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
137 const SmallVectorImpl<MCParsedAsmOperand*> &);
138 bool cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
139 const SmallVectorImpl<MCParsedAsmOperand*> &);
140 bool cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
141 const SmallVectorImpl<MCParsedAsmOperand*> &);
142 bool cvtLdrdPre(MCInst &Inst, unsigned Opcode,
143 const SmallVectorImpl<MCParsedAsmOperand*> &);
144 bool cvtStrdPre(MCInst &Inst, unsigned Opcode,
145 const SmallVectorImpl<MCParsedAsmOperand*> &);
146 bool cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
147 const SmallVectorImpl<MCParsedAsmOperand*> &);
148 bool cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
149 const SmallVectorImpl<MCParsedAsmOperand*> &);
151 bool validateInstruction(MCInst &Inst,
152 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
153 void processInstruction(MCInst &Inst,
154 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
155 bool shouldOmitCCOutOperand(StringRef Mnemonic,
156 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
159 enum ARMMatchResultTy {
160 Match_RequiresITBlock = FIRST_TARGET_MATCH_RESULT_TY,
165 ARMAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
166 : MCTargetAsmParser(), STI(_STI), Parser(_Parser) {
167 MCAsmParserExtension::Initialize(_Parser);
169 // Initialize the set of available features.
170 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
173 // Implementation of the MCTargetAsmParser interface:
174 bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
175 bool ParseInstruction(StringRef Name, SMLoc NameLoc,
176 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
177 bool ParseDirective(AsmToken DirectiveID);
179 unsigned checkTargetMatchPredicate(MCInst &Inst);
181 bool MatchAndEmitInstruction(SMLoc IDLoc,
182 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
185 } // end anonymous namespace
189 /// ARMOperand - Instances of this class represent a parsed ARM machine
191 class ARMOperand : public MCParsedAsmOperand {
215 SMLoc StartLoc, EndLoc;
216 SmallVector<unsigned, 8> Registers;
220 ARMCC::CondCodes Val;
232 ARM_PROC::IFlags Val;
252 /// Combined record for all forms of ARM address expressions.
255 // Offset is in OffsetReg or OffsetImm. If both are zero, no offset
257 const MCConstantExpr *OffsetImm; // Offset immediate value
258 unsigned OffsetRegNum; // Offset register num, when OffsetImm == NULL
259 ARM_AM::ShiftOpc ShiftType; // Shift type for OffsetReg
260 unsigned ShiftImm; // shift for OffsetReg.
261 unsigned isNegative : 1; // Negated OffsetReg? (~'U' bit)
267 ARM_AM::ShiftOpc ShiftTy;
276 ARM_AM::ShiftOpc ShiftTy;
282 ARM_AM::ShiftOpc ShiftTy;
295 ARMOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
297 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
299 StartLoc = o.StartLoc;
313 case DPRRegisterList:
314 case SPRRegisterList:
315 Registers = o.Registers;
330 case PostIndexRegister:
331 PostIdxReg = o.PostIdxReg;
339 case ShifterImmediate:
340 ShifterImm = o.ShifterImm;
342 case ShiftedRegister:
343 RegShiftedReg = o.RegShiftedReg;
345 case ShiftedImmediate:
346 RegShiftedImm = o.RegShiftedImm;
348 case RotateImmediate:
351 case BitfieldDescriptor:
352 Bitfield = o.Bitfield;
357 /// getStartLoc - Get the location of the first token of this operand.
358 SMLoc getStartLoc() const { return StartLoc; }
359 /// getEndLoc - Get the location of the last token of this operand.
360 SMLoc getEndLoc() const { return EndLoc; }
362 ARMCC::CondCodes getCondCode() const {
363 assert(Kind == CondCode && "Invalid access!");
367 unsigned getCoproc() const {
368 assert((Kind == CoprocNum || Kind == CoprocReg) && "Invalid access!");
372 StringRef getToken() const {
373 assert(Kind == Token && "Invalid access!");
374 return StringRef(Tok.Data, Tok.Length);
377 unsigned getReg() const {
378 assert((Kind == Register || Kind == CCOut) && "Invalid access!");
382 const SmallVectorImpl<unsigned> &getRegList() const {
383 assert((Kind == RegisterList || Kind == DPRRegisterList ||
384 Kind == SPRRegisterList) && "Invalid access!");
388 const MCExpr *getImm() const {
389 assert(Kind == Immediate && "Invalid access!");
393 ARM_MB::MemBOpt getMemBarrierOpt() const {
394 assert(Kind == MemBarrierOpt && "Invalid access!");
398 ARM_PROC::IFlags getProcIFlags() const {
399 assert(Kind == ProcIFlags && "Invalid access!");
403 unsigned getMSRMask() const {
404 assert(Kind == MSRMask && "Invalid access!");
408 bool isCoprocNum() const { return Kind == CoprocNum; }
409 bool isCoprocReg() const { return Kind == CoprocReg; }
410 bool isCondCode() const { return Kind == CondCode; }
411 bool isCCOut() const { return Kind == CCOut; }
412 bool isImm() const { return Kind == Immediate; }
413 bool isImm0_255() 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 < 256;
421 bool isImm0_7() 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 < 8;
429 bool isImm0_15() 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 < 16;
437 bool isImm0_31() 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 < 32;
445 bool isImm1_16() const {
446 if (Kind != Immediate)
448 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
449 if (!CE) return false;
450 int64_t Value = CE->getValue();
451 return Value > 0 && Value < 17;
453 bool isImm1_32() const {
454 if (Kind != Immediate)
456 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
457 if (!CE) return false;
458 int64_t Value = CE->getValue();
459 return Value > 0 && Value < 33;
461 bool isImm0_65535() const {
462 if (Kind != Immediate)
464 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
465 if (!CE) return false;
466 int64_t Value = CE->getValue();
467 return Value >= 0 && Value < 65536;
469 bool isImm0_65535Expr() const {
470 if (Kind != Immediate)
472 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
473 // If it's not a constant expression, it'll generate a fixup and be
475 if (!CE) return true;
476 int64_t Value = CE->getValue();
477 return Value >= 0 && Value < 65536;
479 bool isImm24bit() 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 Value >= 0 && Value <= 0xffffff;
487 bool isImmThumbSR() 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 Value > 0 && Value < 33;
495 bool isPKHLSLImm() 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 >= 0 && Value < 32;
503 bool isPKHASRImm() const {
504 if (Kind != Immediate)
506 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
507 if (!CE) return false;
508 int64_t Value = CE->getValue();
509 return Value > 0 && Value <= 32;
511 bool isARMSOImm() const {
512 if (Kind != Immediate)
514 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
515 if (!CE) return false;
516 int64_t Value = CE->getValue();
517 return ARM_AM::getSOImmVal(Value) != -1;
519 bool isT2SOImm() const {
520 if (Kind != Immediate)
522 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
523 if (!CE) return false;
524 int64_t Value = CE->getValue();
525 return ARM_AM::getT2SOImmVal(Value) != -1;
527 bool isSetEndImm() const {
528 if (Kind != Immediate)
530 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
531 if (!CE) return false;
532 int64_t Value = CE->getValue();
533 return Value == 1 || Value == 0;
535 bool isReg() const { return Kind == Register; }
536 bool isRegList() const { return Kind == RegisterList; }
537 bool isDPRRegList() const { return Kind == DPRRegisterList; }
538 bool isSPRRegList() const { return Kind == SPRRegisterList; }
539 bool isToken() const { return Kind == Token; }
540 bool isMemBarrierOpt() const { return Kind == MemBarrierOpt; }
541 bool isMemory() const { return Kind == Memory; }
542 bool isShifterImm() const { return Kind == ShifterImmediate; }
543 bool isRegShiftedReg() const { return Kind == ShiftedRegister; }
544 bool isRegShiftedImm() const { return Kind == ShiftedImmediate; }
545 bool isRotImm() const { return Kind == RotateImmediate; }
546 bool isBitfield() const { return Kind == BitfieldDescriptor; }
547 bool isPostIdxRegShifted() const { return Kind == PostIndexRegister; }
548 bool isPostIdxReg() const {
549 return Kind == PostIndexRegister && PostIdxReg.ShiftTy == ARM_AM::no_shift;
551 bool isMemNoOffset() const {
554 // No offset of any kind.
555 return Mem.OffsetRegNum == 0 && Mem.OffsetImm == 0;
557 bool isAddrMode2() const {
560 // Check for register offset.
561 if (Mem.OffsetRegNum) return true;
562 // Immediate offset in range [-4095, 4095].
563 if (!Mem.OffsetImm) return true;
564 int64_t Val = Mem.OffsetImm->getValue();
565 return Val > -4096 && Val < 4096;
567 bool isAM2OffsetImm() const {
568 if (Kind != Immediate)
570 // Immediate offset in range [-4095, 4095].
571 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
572 if (!CE) return false;
573 int64_t Val = CE->getValue();
574 return Val > -4096 && Val < 4096;
576 bool isAddrMode3() const {
579 // No shifts are legal for AM3.
580 if (Mem.ShiftType != ARM_AM::no_shift) return false;
581 // Check for register offset.
582 if (Mem.OffsetRegNum) return true;
583 // Immediate offset in range [-255, 255].
584 if (!Mem.OffsetImm) return true;
585 int64_t Val = Mem.OffsetImm->getValue();
586 return Val > -256 && Val < 256;
588 bool isAM3Offset() const {
589 if (Kind != Immediate && Kind != PostIndexRegister)
591 if (Kind == PostIndexRegister)
592 return PostIdxReg.ShiftTy == ARM_AM::no_shift;
593 // Immediate offset in range [-255, 255].
594 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
595 if (!CE) return false;
596 int64_t Val = CE->getValue();
597 // Special case, #-0 is INT32_MIN.
598 return (Val > -256 && Val < 256) || Val == INT32_MIN;
600 bool isAddrMode5() const {
603 // Check for register offset.
604 if (Mem.OffsetRegNum) return false;
605 // Immediate offset in range [-1020, 1020] and a multiple of 4.
606 if (!Mem.OffsetImm) return true;
607 int64_t Val = Mem.OffsetImm->getValue();
608 return Val >= -1020 && Val <= 1020 && ((Val & 3) == 0);
610 bool isMemRegOffset() const {
611 if (Kind != Memory || !Mem.OffsetRegNum)
615 bool isMemThumbRR() const {
616 // Thumb reg+reg addressing is simple. Just two registers, a base and
617 // an offset. No shifts, negations or any other complicating factors.
618 if (Kind != Memory || !Mem.OffsetRegNum || Mem.isNegative ||
619 Mem.ShiftType != ARM_AM::no_shift)
621 return isARMLowRegister(Mem.BaseRegNum) &&
622 (!Mem.OffsetRegNum || isARMLowRegister(Mem.OffsetRegNum));
624 bool isMemThumbRIs4() const {
625 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
626 !isARMLowRegister(Mem.BaseRegNum))
628 // Immediate offset, multiple of 4 in range [0, 124].
629 if (!Mem.OffsetImm) return true;
630 int64_t Val = Mem.OffsetImm->getValue();
631 return Val >= 0 && Val <= 124 && (Val % 4) == 0;
633 bool isMemThumbRIs2() const {
634 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
635 !isARMLowRegister(Mem.BaseRegNum))
637 // Immediate offset, multiple of 4 in range [0, 62].
638 if (!Mem.OffsetImm) return true;
639 int64_t Val = Mem.OffsetImm->getValue();
640 return Val >= 0 && Val <= 62 && (Val % 2) == 0;
642 bool isMemThumbRIs1() const {
643 if (Kind != Memory || Mem.OffsetRegNum != 0 ||
644 !isARMLowRegister(Mem.BaseRegNum))
646 // Immediate offset in range [0, 31].
647 if (!Mem.OffsetImm) return true;
648 int64_t Val = Mem.OffsetImm->getValue();
649 return Val >= 0 && Val <= 31;
651 bool isMemThumbSPI() const {
652 if (Kind != Memory || Mem.OffsetRegNum != 0 || Mem.BaseRegNum != ARM::SP)
654 // Immediate offset, multiple of 4 in range [0, 1020].
655 if (!Mem.OffsetImm) return true;
656 int64_t Val = Mem.OffsetImm->getValue();
657 return Val >= 0 && Val <= 1020 && (Val % 4) == 0;
659 bool isMemImm8Offset() const {
660 if (Kind != Memory || Mem.OffsetRegNum != 0)
662 // Immediate offset in range [-255, 255].
663 if (!Mem.OffsetImm) return true;
664 int64_t Val = Mem.OffsetImm->getValue();
665 return Val > -256 && Val < 256;
667 bool isMemImm12Offset() const {
668 // If we have an immediate that's not a constant, treat it as a label
669 // reference needing a fixup. If it is a constant, it's something else
671 if (Kind == Immediate && !isa<MCConstantExpr>(getImm()))
674 if (Kind != Memory || Mem.OffsetRegNum != 0)
676 // Immediate offset in range [-4095, 4095].
677 if (!Mem.OffsetImm) return true;
678 int64_t Val = Mem.OffsetImm->getValue();
679 return Val > -4096 && Val < 4096;
681 bool isPostIdxImm8() const {
682 if (Kind != Immediate)
684 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
685 if (!CE) return false;
686 int64_t Val = CE->getValue();
687 return Val > -256 && Val < 256;
690 bool isMSRMask() const { return Kind == MSRMask; }
691 bool isProcIFlags() const { return Kind == ProcIFlags; }
693 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
694 // Add as immediates when possible. Null MCExpr = 0.
696 Inst.addOperand(MCOperand::CreateImm(0));
697 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
698 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
700 Inst.addOperand(MCOperand::CreateExpr(Expr));
703 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
704 assert(N == 2 && "Invalid number of operands!");
705 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
706 unsigned RegNum = getCondCode() == ARMCC::AL ? 0: ARM::CPSR;
707 Inst.addOperand(MCOperand::CreateReg(RegNum));
710 void addCoprocNumOperands(MCInst &Inst, unsigned N) const {
711 assert(N == 1 && "Invalid number of operands!");
712 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
715 void addCoprocRegOperands(MCInst &Inst, unsigned N) const {
716 assert(N == 1 && "Invalid number of operands!");
717 Inst.addOperand(MCOperand::CreateImm(getCoproc()));
720 void addCCOutOperands(MCInst &Inst, unsigned N) const {
721 assert(N == 1 && "Invalid number of operands!");
722 Inst.addOperand(MCOperand::CreateReg(getReg()));
725 void addRegOperands(MCInst &Inst, unsigned N) const {
726 assert(N == 1 && "Invalid number of operands!");
727 Inst.addOperand(MCOperand::CreateReg(getReg()));
730 void addRegShiftedRegOperands(MCInst &Inst, unsigned N) const {
731 assert(N == 3 && "Invalid number of operands!");
732 assert(isRegShiftedReg() && "addRegShiftedRegOperands() on non RegShiftedReg!");
733 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.SrcReg));
734 Inst.addOperand(MCOperand::CreateReg(RegShiftedReg.ShiftReg));
735 Inst.addOperand(MCOperand::CreateImm(
736 ARM_AM::getSORegOpc(RegShiftedReg.ShiftTy, RegShiftedReg.ShiftImm)));
739 void addRegShiftedImmOperands(MCInst &Inst, unsigned N) const {
740 assert(N == 2 && "Invalid number of operands!");
741 assert(isRegShiftedImm() && "addRegShiftedImmOperands() on non RegShiftedImm!");
742 Inst.addOperand(MCOperand::CreateReg(RegShiftedImm.SrcReg));
743 Inst.addOperand(MCOperand::CreateImm(
744 ARM_AM::getSORegOpc(RegShiftedImm.ShiftTy, RegShiftedImm.ShiftImm)));
748 void addShifterImmOperands(MCInst &Inst, unsigned N) const {
749 assert(N == 1 && "Invalid number of operands!");
750 Inst.addOperand(MCOperand::CreateImm((ShifterImm.isASR << 5) |
754 void addRegListOperands(MCInst &Inst, unsigned N) const {
755 assert(N == 1 && "Invalid number of operands!");
756 const SmallVectorImpl<unsigned> &RegList = getRegList();
757 for (SmallVectorImpl<unsigned>::const_iterator
758 I = RegList.begin(), E = RegList.end(); I != E; ++I)
759 Inst.addOperand(MCOperand::CreateReg(*I));
762 void addDPRRegListOperands(MCInst &Inst, unsigned N) const {
763 addRegListOperands(Inst, N);
766 void addSPRRegListOperands(MCInst &Inst, unsigned N) const {
767 addRegListOperands(Inst, N);
770 void addRotImmOperands(MCInst &Inst, unsigned N) const {
771 assert(N == 1 && "Invalid number of operands!");
772 // Encoded as val>>3. The printer handles display as 8, 16, 24.
773 Inst.addOperand(MCOperand::CreateImm(RotImm.Imm >> 3));
776 void addBitfieldOperands(MCInst &Inst, unsigned N) const {
777 assert(N == 1 && "Invalid number of operands!");
778 // Munge the lsb/width into a bitfield mask.
779 unsigned lsb = Bitfield.LSB;
780 unsigned width = Bitfield.Width;
781 // Make a 32-bit mask w/ the referenced bits clear and all other bits set.
782 uint32_t Mask = ~(((uint32_t)0xffffffff >> lsb) << (32 - width) >>
783 (32 - (lsb + width)));
784 Inst.addOperand(MCOperand::CreateImm(Mask));
787 void addImmOperands(MCInst &Inst, unsigned N) const {
788 assert(N == 1 && "Invalid number of operands!");
789 addExpr(Inst, getImm());
792 void addImm0_255Operands(MCInst &Inst, unsigned N) const {
793 assert(N == 1 && "Invalid number of operands!");
794 addExpr(Inst, getImm());
797 void addImm0_7Operands(MCInst &Inst, unsigned N) const {
798 assert(N == 1 && "Invalid number of operands!");
799 addExpr(Inst, getImm());
802 void addImm0_15Operands(MCInst &Inst, unsigned N) const {
803 assert(N == 1 && "Invalid number of operands!");
804 addExpr(Inst, getImm());
807 void addImm0_31Operands(MCInst &Inst, unsigned N) const {
808 assert(N == 1 && "Invalid number of operands!");
809 addExpr(Inst, getImm());
812 void addImm1_16Operands(MCInst &Inst, unsigned N) const {
813 assert(N == 1 && "Invalid number of operands!");
814 // The constant encodes as the immediate-1, and we store in the instruction
815 // the bits as encoded, so subtract off one here.
816 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
817 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
820 void addImm1_32Operands(MCInst &Inst, unsigned N) const {
821 assert(N == 1 && "Invalid number of operands!");
822 // The constant encodes as the immediate-1, and we store in the instruction
823 // the bits as encoded, so subtract off one here.
824 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
825 Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
828 void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
829 assert(N == 1 && "Invalid number of operands!");
830 addExpr(Inst, getImm());
833 void addImm0_65535ExprOperands(MCInst &Inst, unsigned N) const {
834 assert(N == 1 && "Invalid number of operands!");
835 addExpr(Inst, getImm());
838 void addImm24bitOperands(MCInst &Inst, unsigned N) const {
839 assert(N == 1 && "Invalid number of operands!");
840 addExpr(Inst, getImm());
843 void addImmThumbSROperands(MCInst &Inst, unsigned N) const {
844 assert(N == 1 && "Invalid number of operands!");
845 // The constant encodes as the immediate, except for 32, which encodes as
847 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
848 unsigned Imm = CE->getValue();
849 Inst.addOperand(MCOperand::CreateImm((Imm == 32 ? 0 : Imm)));
852 void addPKHLSLImmOperands(MCInst &Inst, unsigned N) const {
853 assert(N == 1 && "Invalid number of operands!");
854 addExpr(Inst, getImm());
857 void addPKHASRImmOperands(MCInst &Inst, unsigned N) const {
858 assert(N == 1 && "Invalid number of operands!");
859 // An ASR value of 32 encodes as 0, so that's how we want to add it to
860 // the instruction as well.
861 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
862 int Val = CE->getValue();
863 Inst.addOperand(MCOperand::CreateImm(Val == 32 ? 0 : Val));
866 void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
867 assert(N == 1 && "Invalid number of operands!");
868 addExpr(Inst, getImm());
871 void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
872 assert(N == 1 && "Invalid number of operands!");
873 addExpr(Inst, getImm());
876 void addSetEndImmOperands(MCInst &Inst, unsigned N) const {
877 assert(N == 1 && "Invalid number of operands!");
878 addExpr(Inst, getImm());
881 void addMemBarrierOptOperands(MCInst &Inst, unsigned N) const {
882 assert(N == 1 && "Invalid number of operands!");
883 Inst.addOperand(MCOperand::CreateImm(unsigned(getMemBarrierOpt())));
886 void addMemNoOffsetOperands(MCInst &Inst, unsigned N) const {
887 assert(N == 1 && "Invalid number of operands!");
888 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
891 void addAddrMode2Operands(MCInst &Inst, unsigned N) const {
892 assert(N == 3 && "Invalid number of operands!");
893 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
894 if (!Mem.OffsetRegNum) {
895 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
896 // Special case for #-0
897 if (Val == INT32_MIN) Val = 0;
898 if (Val < 0) Val = -Val;
899 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
901 // For register offset, we encode the shift type and negation flag
903 Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
904 Mem.ShiftImm, Mem.ShiftType);
906 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
907 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
908 Inst.addOperand(MCOperand::CreateImm(Val));
911 void addAM2OffsetImmOperands(MCInst &Inst, unsigned N) const {
912 assert(N == 2 && "Invalid number of operands!");
913 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
914 assert(CE && "non-constant AM2OffsetImm operand!");
915 int32_t Val = CE->getValue();
916 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
917 // Special case for #-0
918 if (Val == INT32_MIN) Val = 0;
919 if (Val < 0) Val = -Val;
920 Val = ARM_AM::getAM2Opc(AddSub, Val, ARM_AM::no_shift);
921 Inst.addOperand(MCOperand::CreateReg(0));
922 Inst.addOperand(MCOperand::CreateImm(Val));
925 void addAddrMode3Operands(MCInst &Inst, unsigned N) const {
926 assert(N == 3 && "Invalid number of operands!");
927 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
928 if (!Mem.OffsetRegNum) {
929 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
930 // Special case for #-0
931 if (Val == INT32_MIN) Val = 0;
932 if (Val < 0) Val = -Val;
933 Val = ARM_AM::getAM3Opc(AddSub, Val);
935 // For register offset, we encode the shift type and negation flag
937 Val = ARM_AM::getAM3Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add, 0);
939 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
940 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
941 Inst.addOperand(MCOperand::CreateImm(Val));
944 void addAM3OffsetOperands(MCInst &Inst, unsigned N) const {
945 assert(N == 2 && "Invalid number of operands!");
946 if (Kind == PostIndexRegister) {
948 ARM_AM::getAM3Opc(PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub, 0);
949 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
950 Inst.addOperand(MCOperand::CreateImm(Val));
955 const MCConstantExpr *CE = static_cast<const MCConstantExpr*>(getImm());
956 int32_t Val = CE->getValue();
957 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
958 // Special case for #-0
959 if (Val == INT32_MIN) Val = 0;
960 if (Val < 0) Val = -Val;
961 Val = ARM_AM::getAM3Opc(AddSub, Val);
962 Inst.addOperand(MCOperand::CreateReg(0));
963 Inst.addOperand(MCOperand::CreateImm(Val));
966 void addAddrMode5Operands(MCInst &Inst, unsigned N) const {
967 assert(N == 2 && "Invalid number of operands!");
968 // The lower two bits are always zero and as such are not encoded.
969 int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0;
970 ARM_AM::AddrOpc AddSub = Val < 0 ? ARM_AM::sub : ARM_AM::add;
971 // Special case for #-0
972 if (Val == INT32_MIN) Val = 0;
973 if (Val < 0) Val = -Val;
974 Val = ARM_AM::getAM5Opc(AddSub, Val);
975 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
976 Inst.addOperand(MCOperand::CreateImm(Val));
979 void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const {
980 assert(N == 2 && "Invalid number of operands!");
981 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
982 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
983 Inst.addOperand(MCOperand::CreateImm(Val));
986 void addMemImm12OffsetOperands(MCInst &Inst, unsigned N) const {
987 assert(N == 2 && "Invalid number of operands!");
988 // If this is an immediate, it's a label reference.
989 if (Kind == Immediate) {
990 addExpr(Inst, getImm());
991 Inst.addOperand(MCOperand::CreateImm(0));
995 // Otherwise, it's a normal memory reg+offset.
996 int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0;
997 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
998 Inst.addOperand(MCOperand::CreateImm(Val));
1001 void addMemRegOffsetOperands(MCInst &Inst, unsigned N) const {
1002 assert(N == 3 && "Invalid number of operands!");
1003 unsigned Val = ARM_AM::getAM2Opc(Mem.isNegative ? ARM_AM::sub : ARM_AM::add,
1004 Mem.ShiftImm, Mem.ShiftType);
1005 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1006 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1007 Inst.addOperand(MCOperand::CreateImm(Val));
1010 void addMemThumbRROperands(MCInst &Inst, unsigned N) const {
1011 assert(N == 2 && "Invalid number of operands!");
1012 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1013 Inst.addOperand(MCOperand::CreateReg(Mem.OffsetRegNum));
1016 void addMemThumbRIs4Operands(MCInst &Inst, unsigned N) const {
1017 assert(N == 2 && "Invalid number of operands!");
1018 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1019 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1020 Inst.addOperand(MCOperand::CreateImm(Val));
1023 void addMemThumbRIs2Operands(MCInst &Inst, unsigned N) const {
1024 assert(N == 2 && "Invalid number of operands!");
1025 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 2) : 0;
1026 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1027 Inst.addOperand(MCOperand::CreateImm(Val));
1030 void addMemThumbRIs1Operands(MCInst &Inst, unsigned N) const {
1031 assert(N == 2 && "Invalid number of operands!");
1032 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue()) : 0;
1033 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1034 Inst.addOperand(MCOperand::CreateImm(Val));
1037 void addMemThumbSPIOperands(MCInst &Inst, unsigned N) const {
1038 assert(N == 2 && "Invalid number of operands!");
1039 int64_t Val = Mem.OffsetImm ? (Mem.OffsetImm->getValue() / 4) : 0;
1040 Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum));
1041 Inst.addOperand(MCOperand::CreateImm(Val));
1044 void addPostIdxImm8Operands(MCInst &Inst, unsigned N) const {
1045 assert(N == 1 && "Invalid number of operands!");
1046 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
1047 assert(CE && "non-constant post-idx-imm8 operand!");
1048 int Imm = CE->getValue();
1049 bool isAdd = Imm >= 0;
1050 Imm = (Imm < 0 ? -Imm : Imm) | (int)isAdd << 8;
1051 Inst.addOperand(MCOperand::CreateImm(Imm));
1054 void addPostIdxRegOperands(MCInst &Inst, unsigned N) const {
1055 assert(N == 2 && "Invalid number of operands!");
1056 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1057 Inst.addOperand(MCOperand::CreateImm(PostIdxReg.isAdd));
1060 void addPostIdxRegShiftedOperands(MCInst &Inst, unsigned N) const {
1061 assert(N == 2 && "Invalid number of operands!");
1062 Inst.addOperand(MCOperand::CreateReg(PostIdxReg.RegNum));
1063 // The sign, shift type, and shift amount are encoded in a single operand
1064 // using the AM2 encoding helpers.
1065 ARM_AM::AddrOpc opc = PostIdxReg.isAdd ? ARM_AM::add : ARM_AM::sub;
1066 unsigned Imm = ARM_AM::getAM2Opc(opc, PostIdxReg.ShiftImm,
1067 PostIdxReg.ShiftTy);
1068 Inst.addOperand(MCOperand::CreateImm(Imm));
1071 void addMSRMaskOperands(MCInst &Inst, unsigned N) const {
1072 assert(N == 1 && "Invalid number of operands!");
1073 Inst.addOperand(MCOperand::CreateImm(unsigned(getMSRMask())));
1076 void addProcIFlagsOperands(MCInst &Inst, unsigned N) const {
1077 assert(N == 1 && "Invalid number of operands!");
1078 Inst.addOperand(MCOperand::CreateImm(unsigned(getProcIFlags())));
1081 virtual void print(raw_ostream &OS) const;
1083 static ARMOperand *CreateCondCode(ARMCC::CondCodes CC, SMLoc S) {
1084 ARMOperand *Op = new ARMOperand(CondCode);
1091 static ARMOperand *CreateCoprocNum(unsigned CopVal, SMLoc S) {
1092 ARMOperand *Op = new ARMOperand(CoprocNum);
1093 Op->Cop.Val = CopVal;
1099 static ARMOperand *CreateCoprocReg(unsigned CopVal, SMLoc S) {
1100 ARMOperand *Op = new ARMOperand(CoprocReg);
1101 Op->Cop.Val = CopVal;
1107 static ARMOperand *CreateCCOut(unsigned RegNum, SMLoc S) {
1108 ARMOperand *Op = new ARMOperand(CCOut);
1109 Op->Reg.RegNum = RegNum;
1115 static ARMOperand *CreateToken(StringRef Str, SMLoc S) {
1116 ARMOperand *Op = new ARMOperand(Token);
1117 Op->Tok.Data = Str.data();
1118 Op->Tok.Length = Str.size();
1124 static ARMOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
1125 ARMOperand *Op = new ARMOperand(Register);
1126 Op->Reg.RegNum = RegNum;
1132 static ARMOperand *CreateShiftedRegister(ARM_AM::ShiftOpc ShTy,
1137 ARMOperand *Op = new ARMOperand(ShiftedRegister);
1138 Op->RegShiftedReg.ShiftTy = ShTy;
1139 Op->RegShiftedReg.SrcReg = SrcReg;
1140 Op->RegShiftedReg.ShiftReg = ShiftReg;
1141 Op->RegShiftedReg.ShiftImm = ShiftImm;
1147 static ARMOperand *CreateShiftedImmediate(ARM_AM::ShiftOpc ShTy,
1151 ARMOperand *Op = new ARMOperand(ShiftedImmediate);
1152 Op->RegShiftedImm.ShiftTy = ShTy;
1153 Op->RegShiftedImm.SrcReg = SrcReg;
1154 Op->RegShiftedImm.ShiftImm = ShiftImm;
1160 static ARMOperand *CreateShifterImm(bool isASR, unsigned Imm,
1162 ARMOperand *Op = new ARMOperand(ShifterImmediate);
1163 Op->ShifterImm.isASR = isASR;
1164 Op->ShifterImm.Imm = Imm;
1170 static ARMOperand *CreateRotImm(unsigned Imm, SMLoc S, SMLoc E) {
1171 ARMOperand *Op = new ARMOperand(RotateImmediate);
1172 Op->RotImm.Imm = Imm;
1178 static ARMOperand *CreateBitfield(unsigned LSB, unsigned Width,
1180 ARMOperand *Op = new ARMOperand(BitfieldDescriptor);
1181 Op->Bitfield.LSB = LSB;
1182 Op->Bitfield.Width = Width;
1189 CreateRegList(const SmallVectorImpl<std::pair<unsigned, SMLoc> > &Regs,
1190 SMLoc StartLoc, SMLoc EndLoc) {
1191 KindTy Kind = RegisterList;
1193 if (llvm::ARMMCRegisterClasses[ARM::DPRRegClassID].
1194 contains(Regs.front().first))
1195 Kind = DPRRegisterList;
1196 else if (llvm::ARMMCRegisterClasses[ARM::SPRRegClassID].
1197 contains(Regs.front().first))
1198 Kind = SPRRegisterList;
1200 ARMOperand *Op = new ARMOperand(Kind);
1201 for (SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1202 I = Regs.begin(), E = Regs.end(); I != E; ++I)
1203 Op->Registers.push_back(I->first);
1204 array_pod_sort(Op->Registers.begin(), Op->Registers.end());
1205 Op->StartLoc = StartLoc;
1206 Op->EndLoc = EndLoc;
1210 static ARMOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
1211 ARMOperand *Op = new ARMOperand(Immediate);
1218 static ARMOperand *CreateMem(unsigned BaseRegNum,
1219 const MCConstantExpr *OffsetImm,
1220 unsigned OffsetRegNum,
1221 ARM_AM::ShiftOpc ShiftType,
1225 ARMOperand *Op = new ARMOperand(Memory);
1226 Op->Mem.BaseRegNum = BaseRegNum;
1227 Op->Mem.OffsetImm = OffsetImm;
1228 Op->Mem.OffsetRegNum = OffsetRegNum;
1229 Op->Mem.ShiftType = ShiftType;
1230 Op->Mem.ShiftImm = ShiftImm;
1231 Op->Mem.isNegative = isNegative;
1237 static ARMOperand *CreatePostIdxReg(unsigned RegNum, bool isAdd,
1238 ARM_AM::ShiftOpc ShiftTy,
1241 ARMOperand *Op = new ARMOperand(PostIndexRegister);
1242 Op->PostIdxReg.RegNum = RegNum;
1243 Op->PostIdxReg.isAdd = isAdd;
1244 Op->PostIdxReg.ShiftTy = ShiftTy;
1245 Op->PostIdxReg.ShiftImm = ShiftImm;
1251 static ARMOperand *CreateMemBarrierOpt(ARM_MB::MemBOpt Opt, SMLoc S) {
1252 ARMOperand *Op = new ARMOperand(MemBarrierOpt);
1253 Op->MBOpt.Val = Opt;
1259 static ARMOperand *CreateProcIFlags(ARM_PROC::IFlags IFlags, SMLoc S) {
1260 ARMOperand *Op = new ARMOperand(ProcIFlags);
1261 Op->IFlags.Val = IFlags;
1267 static ARMOperand *CreateMSRMask(unsigned MMask, SMLoc S) {
1268 ARMOperand *Op = new ARMOperand(MSRMask);
1269 Op->MMask.Val = MMask;
1276 } // end anonymous namespace.
1278 void ARMOperand::print(raw_ostream &OS) const {
1281 OS << "<ARMCC::" << ARMCondCodeToString(getCondCode()) << ">";
1284 OS << "<ccout " << getReg() << ">";
1287 OS << "<coprocessor number: " << getCoproc() << ">";
1290 OS << "<coprocessor register: " << getCoproc() << ">";
1293 OS << "<mask: " << getMSRMask() << ">";
1296 getImm()->print(OS);
1299 OS << "<ARM_MB::" << MemBOptToString(getMemBarrierOpt()) << ">";
1303 << " base:" << Mem.BaseRegNum;
1306 case PostIndexRegister:
1307 OS << "post-idx register " << (PostIdxReg.isAdd ? "" : "-")
1308 << PostIdxReg.RegNum;
1309 if (PostIdxReg.ShiftTy != ARM_AM::no_shift)
1310 OS << ARM_AM::getShiftOpcStr(PostIdxReg.ShiftTy) << " "
1311 << PostIdxReg.ShiftImm;
1315 OS << "<ARM_PROC::";
1316 unsigned IFlags = getProcIFlags();
1317 for (int i=2; i >= 0; --i)
1318 if (IFlags & (1 << i))
1319 OS << ARM_PROC::IFlagsToString(1 << i);
1324 OS << "<register " << getReg() << ">";
1326 case ShifterImmediate:
1327 OS << "<shift " << (ShifterImm.isASR ? "asr" : "lsl")
1328 << " #" << ShifterImm.Imm << ">";
1330 case ShiftedRegister:
1331 OS << "<so_reg_reg "
1332 << RegShiftedReg.SrcReg
1333 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedReg.ShiftImm))
1334 << ", " << RegShiftedReg.ShiftReg << ", "
1335 << ARM_AM::getSORegOffset(RegShiftedReg.ShiftImm)
1338 case ShiftedImmediate:
1339 OS << "<so_reg_imm "
1340 << RegShiftedImm.SrcReg
1341 << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(RegShiftedImm.ShiftImm))
1342 << ", " << ARM_AM::getSORegOffset(RegShiftedImm.ShiftImm)
1345 case RotateImmediate:
1346 OS << "<ror " << " #" << (RotImm.Imm * 8) << ">";
1348 case BitfieldDescriptor:
1349 OS << "<bitfield " << "lsb: " << Bitfield.LSB
1350 << ", width: " << Bitfield.Width << ">";
1353 case DPRRegisterList:
1354 case SPRRegisterList: {
1355 OS << "<register_list ";
1357 const SmallVectorImpl<unsigned> &RegList = getRegList();
1358 for (SmallVectorImpl<unsigned>::const_iterator
1359 I = RegList.begin(), E = RegList.end(); I != E; ) {
1361 if (++I < E) OS << ", ";
1368 OS << "'" << getToken() << "'";
1373 /// @name Auto-generated Match Functions
1376 static unsigned MatchRegisterName(StringRef Name);
1380 bool ARMAsmParser::ParseRegister(unsigned &RegNo,
1381 SMLoc &StartLoc, SMLoc &EndLoc) {
1382 RegNo = tryParseRegister();
1384 return (RegNo == (unsigned)-1);
1387 /// Try to parse a register name. The token must be an Identifier when called,
1388 /// and if it is a register name the token is eaten and the register number is
1389 /// returned. Otherwise return -1.
1391 int ARMAsmParser::tryParseRegister() {
1392 const AsmToken &Tok = Parser.getTok();
1393 if (Tok.isNot(AsmToken::Identifier)) return -1;
1395 // FIXME: Validate register for the current architecture; we have to do
1396 // validation later, so maybe there is no need for this here.
1397 std::string upperCase = Tok.getString().str();
1398 std::string lowerCase = LowercaseString(upperCase);
1399 unsigned RegNum = MatchRegisterName(lowerCase);
1401 RegNum = StringSwitch<unsigned>(lowerCase)
1402 .Case("r13", ARM::SP)
1403 .Case("r14", ARM::LR)
1404 .Case("r15", ARM::PC)
1405 .Case("ip", ARM::R12)
1408 if (!RegNum) return -1;
1410 Parser.Lex(); // Eat identifier token.
1414 // Try to parse a shifter (e.g., "lsl <amt>"). On success, return 0.
1415 // If a recoverable error occurs, return 1. If an irrecoverable error
1416 // occurs, return -1. An irrecoverable error is one where tokens have been
1417 // consumed in the process of trying to parse the shifter (i.e., when it is
1418 // indeed a shifter operand, but malformed).
1419 int ARMAsmParser::tryParseShiftRegister(
1420 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1421 SMLoc S = Parser.getTok().getLoc();
1422 const AsmToken &Tok = Parser.getTok();
1423 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1425 std::string upperCase = Tok.getString().str();
1426 std::string lowerCase = LowercaseString(upperCase);
1427 ARM_AM::ShiftOpc ShiftTy = StringSwitch<ARM_AM::ShiftOpc>(lowerCase)
1428 .Case("lsl", ARM_AM::lsl)
1429 .Case("lsr", ARM_AM::lsr)
1430 .Case("asr", ARM_AM::asr)
1431 .Case("ror", ARM_AM::ror)
1432 .Case("rrx", ARM_AM::rrx)
1433 .Default(ARM_AM::no_shift);
1435 if (ShiftTy == ARM_AM::no_shift)
1438 Parser.Lex(); // Eat the operator.
1440 // The source register for the shift has already been added to the
1441 // operand list, so we need to pop it off and combine it into the shifted
1442 // register operand instead.
1443 OwningPtr<ARMOperand> PrevOp((ARMOperand*)Operands.pop_back_val());
1444 if (!PrevOp->isReg())
1445 return Error(PrevOp->getStartLoc(), "shift must be of a register");
1446 int SrcReg = PrevOp->getReg();
1449 if (ShiftTy == ARM_AM::rrx) {
1450 // RRX Doesn't have an explicit shift amount. The encoder expects
1451 // the shift register to be the same as the source register. Seems odd,
1455 // Figure out if this is shifted by a constant or a register (for non-RRX).
1456 if (Parser.getTok().is(AsmToken::Hash)) {
1457 Parser.Lex(); // Eat hash.
1458 SMLoc ImmLoc = Parser.getTok().getLoc();
1459 const MCExpr *ShiftExpr = 0;
1460 if (getParser().ParseExpression(ShiftExpr)) {
1461 Error(ImmLoc, "invalid immediate shift value");
1464 // The expression must be evaluatable as an immediate.
1465 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftExpr);
1467 Error(ImmLoc, "invalid immediate shift value");
1470 // Range check the immediate.
1471 // lsl, ror: 0 <= imm <= 31
1472 // lsr, asr: 0 <= imm <= 32
1473 Imm = CE->getValue();
1475 ((ShiftTy == ARM_AM::lsl || ShiftTy == ARM_AM::ror) && Imm > 31) ||
1476 ((ShiftTy == ARM_AM::lsr || ShiftTy == ARM_AM::asr) && Imm > 32)) {
1477 Error(ImmLoc, "immediate shift value out of range");
1480 } else if (Parser.getTok().is(AsmToken::Identifier)) {
1481 ShiftReg = tryParseRegister();
1482 SMLoc L = Parser.getTok().getLoc();
1483 if (ShiftReg == -1) {
1484 Error (L, "expected immediate or register in shift operand");
1488 Error (Parser.getTok().getLoc(),
1489 "expected immediate or register in shift operand");
1494 if (ShiftReg && ShiftTy != ARM_AM::rrx)
1495 Operands.push_back(ARMOperand::CreateShiftedRegister(ShiftTy, SrcReg,
1497 S, Parser.getTok().getLoc()));
1499 Operands.push_back(ARMOperand::CreateShiftedImmediate(ShiftTy, SrcReg, Imm,
1500 S, Parser.getTok().getLoc()));
1506 /// Try to parse a register name. The token must be an Identifier when called.
1507 /// If it's a register, an AsmOperand is created. Another AsmOperand is created
1508 /// if there is a "writeback". 'true' if it's not a register.
1510 /// TODO this is likely to change to allow different register types and or to
1511 /// parse for a specific register type.
1513 tryParseRegisterWithWriteBack(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1514 SMLoc S = Parser.getTok().getLoc();
1515 int RegNo = tryParseRegister();
1519 Operands.push_back(ARMOperand::CreateReg(RegNo, S, Parser.getTok().getLoc()));
1521 const AsmToken &ExclaimTok = Parser.getTok();
1522 if (ExclaimTok.is(AsmToken::Exclaim)) {
1523 Operands.push_back(ARMOperand::CreateToken(ExclaimTok.getString(),
1524 ExclaimTok.getLoc()));
1525 Parser.Lex(); // Eat exclaim token
1531 /// MatchCoprocessorOperandName - Try to parse an coprocessor related
1532 /// instruction with a symbolic operand name. Example: "p1", "p7", "c3",
1534 static int MatchCoprocessorOperandName(StringRef Name, char CoprocOp) {
1535 // Use the same layout as the tablegen'erated register name matcher. Ugly,
1537 switch (Name.size()) {
1540 if (Name[0] != CoprocOp)
1557 if (Name[0] != CoprocOp || Name[1] != '1')
1561 case '0': return 10;
1562 case '1': return 11;
1563 case '2': return 12;
1564 case '3': return 13;
1565 case '4': return 14;
1566 case '5': return 15;
1574 /// parseCoprocNumOperand - Try to parse an coprocessor number operand. The
1575 /// token must be an Identifier when called, and if it is a coprocessor
1576 /// number, the token is eaten and the operand is added to the operand list.
1577 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1578 parseCoprocNumOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1579 SMLoc S = Parser.getTok().getLoc();
1580 const AsmToken &Tok = Parser.getTok();
1581 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1583 int Num = MatchCoprocessorOperandName(Tok.getString(), 'p');
1585 return MatchOperand_NoMatch;
1587 Parser.Lex(); // Eat identifier token.
1588 Operands.push_back(ARMOperand::CreateCoprocNum(Num, S));
1589 return MatchOperand_Success;
1592 /// parseCoprocRegOperand - Try to parse an coprocessor register operand. The
1593 /// token must be an Identifier when called, and if it is a coprocessor
1594 /// number, the token is eaten and the operand is added to the operand list.
1595 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1596 parseCoprocRegOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1597 SMLoc S = Parser.getTok().getLoc();
1598 const AsmToken &Tok = Parser.getTok();
1599 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1601 int Reg = MatchCoprocessorOperandName(Tok.getString(), 'c');
1603 return MatchOperand_NoMatch;
1605 Parser.Lex(); // Eat identifier token.
1606 Operands.push_back(ARMOperand::CreateCoprocReg(Reg, S));
1607 return MatchOperand_Success;
1610 /// Parse a register list, return it if successful else return null. The first
1611 /// token must be a '{' when called.
1613 parseRegisterList(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1614 assert(Parser.getTok().is(AsmToken::LCurly) &&
1615 "Token is not a Left Curly Brace");
1616 SMLoc S = Parser.getTok().getLoc();
1618 // Read the rest of the registers in the list.
1619 unsigned PrevRegNum = 0;
1620 SmallVector<std::pair<unsigned, SMLoc>, 32> Registers;
1623 bool IsRange = Parser.getTok().is(AsmToken::Minus);
1624 Parser.Lex(); // Eat non-identifier token.
1626 const AsmToken &RegTok = Parser.getTok();
1627 SMLoc RegLoc = RegTok.getLoc();
1628 if (RegTok.isNot(AsmToken::Identifier)) {
1629 Error(RegLoc, "register expected");
1633 int RegNum = tryParseRegister();
1635 Error(RegLoc, "register expected");
1640 int Reg = PrevRegNum;
1643 Registers.push_back(std::make_pair(Reg, RegLoc));
1644 } while (Reg != RegNum);
1646 Registers.push_back(std::make_pair(RegNum, RegLoc));
1649 PrevRegNum = RegNum;
1650 } while (Parser.getTok().is(AsmToken::Comma) ||
1651 Parser.getTok().is(AsmToken::Minus));
1653 // Process the right curly brace of the list.
1654 const AsmToken &RCurlyTok = Parser.getTok();
1655 if (RCurlyTok.isNot(AsmToken::RCurly)) {
1656 Error(RCurlyTok.getLoc(), "'}' expected");
1660 SMLoc E = RCurlyTok.getLoc();
1661 Parser.Lex(); // Eat right curly brace token.
1663 // Verify the register list.
1664 SmallVectorImpl<std::pair<unsigned, SMLoc> >::const_iterator
1665 RI = Registers.begin(), RE = Registers.end();
1667 unsigned HighRegNum = getARMRegisterNumbering(RI->first);
1668 bool EmittedWarning = false;
1670 DenseMap<unsigned, bool> RegMap;
1671 RegMap[HighRegNum] = true;
1673 for (++RI; RI != RE; ++RI) {
1674 const std::pair<unsigned, SMLoc> &RegInfo = *RI;
1675 unsigned Reg = getARMRegisterNumbering(RegInfo.first);
1678 Error(RegInfo.second, "register duplicated in register list");
1682 if (!EmittedWarning && Reg < HighRegNum)
1683 Warning(RegInfo.second,
1684 "register not in ascending order in register list");
1687 HighRegNum = std::max(Reg, HighRegNum);
1690 Operands.push_back(ARMOperand::CreateRegList(Registers, S, E));
1694 /// parseMemBarrierOptOperand - Try to parse DSB/DMB data barrier options.
1695 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1696 parseMemBarrierOptOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1697 SMLoc S = Parser.getTok().getLoc();
1698 const AsmToken &Tok = Parser.getTok();
1699 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1700 StringRef OptStr = Tok.getString();
1702 unsigned Opt = StringSwitch<unsigned>(OptStr.slice(0, OptStr.size()))
1703 .Case("sy", ARM_MB::SY)
1704 .Case("st", ARM_MB::ST)
1705 .Case("sh", ARM_MB::ISH)
1706 .Case("ish", ARM_MB::ISH)
1707 .Case("shst", ARM_MB::ISHST)
1708 .Case("ishst", ARM_MB::ISHST)
1709 .Case("nsh", ARM_MB::NSH)
1710 .Case("un", ARM_MB::NSH)
1711 .Case("nshst", ARM_MB::NSHST)
1712 .Case("unst", ARM_MB::NSHST)
1713 .Case("osh", ARM_MB::OSH)
1714 .Case("oshst", ARM_MB::OSHST)
1718 return MatchOperand_NoMatch;
1720 Parser.Lex(); // Eat identifier token.
1721 Operands.push_back(ARMOperand::CreateMemBarrierOpt((ARM_MB::MemBOpt)Opt, S));
1722 return MatchOperand_Success;
1725 /// parseProcIFlagsOperand - Try to parse iflags from CPS instruction.
1726 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1727 parseProcIFlagsOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1728 SMLoc S = Parser.getTok().getLoc();
1729 const AsmToken &Tok = Parser.getTok();
1730 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1731 StringRef IFlagsStr = Tok.getString();
1733 unsigned IFlags = 0;
1734 for (int i = 0, e = IFlagsStr.size(); i != e; ++i) {
1735 unsigned Flag = StringSwitch<unsigned>(IFlagsStr.substr(i, 1))
1736 .Case("a", ARM_PROC::A)
1737 .Case("i", ARM_PROC::I)
1738 .Case("f", ARM_PROC::F)
1741 // If some specific iflag is already set, it means that some letter is
1742 // present more than once, this is not acceptable.
1743 if (Flag == ~0U || (IFlags & Flag))
1744 return MatchOperand_NoMatch;
1749 Parser.Lex(); // Eat identifier token.
1750 Operands.push_back(ARMOperand::CreateProcIFlags((ARM_PROC::IFlags)IFlags, S));
1751 return MatchOperand_Success;
1754 /// parseMSRMaskOperand - Try to parse mask flags from MSR instruction.
1755 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1756 parseMSRMaskOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1757 SMLoc S = Parser.getTok().getLoc();
1758 const AsmToken &Tok = Parser.getTok();
1759 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
1760 StringRef Mask = Tok.getString();
1762 // Split spec_reg from flag, example: CPSR_sxf => "CPSR" and "sxf"
1763 size_t Start = 0, Next = Mask.find('_');
1764 StringRef Flags = "";
1765 std::string SpecReg = LowercaseString(Mask.slice(Start, Next));
1766 if (Next != StringRef::npos)
1767 Flags = Mask.slice(Next+1, Mask.size());
1769 // FlagsVal contains the complete mask:
1771 // 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1772 unsigned FlagsVal = 0;
1774 if (SpecReg == "apsr") {
1775 FlagsVal = StringSwitch<unsigned>(Flags)
1776 .Case("nzcvq", 0x8) // same as CPSR_f
1777 .Case("g", 0x4) // same as CPSR_s
1778 .Case("nzcvqg", 0xc) // same as CPSR_fs
1781 if (FlagsVal == ~0U) {
1783 return MatchOperand_NoMatch;
1785 FlagsVal = 0; // No flag
1787 } else if (SpecReg == "cpsr" || SpecReg == "spsr") {
1788 if (Flags == "all") // cpsr_all is an alias for cpsr_fc
1790 for (int i = 0, e = Flags.size(); i != e; ++i) {
1791 unsigned Flag = StringSwitch<unsigned>(Flags.substr(i, 1))
1798 // If some specific flag is already set, it means that some letter is
1799 // present more than once, this is not acceptable.
1800 if (FlagsVal == ~0U || (FlagsVal & Flag))
1801 return MatchOperand_NoMatch;
1804 } else // No match for special register.
1805 return MatchOperand_NoMatch;
1807 // Special register without flags are equivalent to "fc" flags.
1811 // Bit 4: Special Reg (cpsr, apsr => 0; spsr => 1)
1812 if (SpecReg == "spsr")
1815 Parser.Lex(); // Eat identifier token.
1816 Operands.push_back(ARMOperand::CreateMSRMask(FlagsVal, S));
1817 return MatchOperand_Success;
1820 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1821 parsePKHImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands, StringRef Op,
1822 int Low, int High) {
1823 const AsmToken &Tok = Parser.getTok();
1824 if (Tok.isNot(AsmToken::Identifier)) {
1825 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1826 return MatchOperand_ParseFail;
1828 StringRef ShiftName = Tok.getString();
1829 std::string LowerOp = LowercaseString(Op);
1830 std::string UpperOp = UppercaseString(Op);
1831 if (ShiftName != LowerOp && ShiftName != UpperOp) {
1832 Error(Parser.getTok().getLoc(), Op + " operand expected.");
1833 return MatchOperand_ParseFail;
1835 Parser.Lex(); // Eat shift type token.
1837 // There must be a '#' and a shift amount.
1838 if (Parser.getTok().isNot(AsmToken::Hash)) {
1839 Error(Parser.getTok().getLoc(), "'#' expected");
1840 return MatchOperand_ParseFail;
1842 Parser.Lex(); // Eat hash token.
1844 const MCExpr *ShiftAmount;
1845 SMLoc Loc = Parser.getTok().getLoc();
1846 if (getParser().ParseExpression(ShiftAmount)) {
1847 Error(Loc, "illegal expression");
1848 return MatchOperand_ParseFail;
1850 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1852 Error(Loc, "constant expression expected");
1853 return MatchOperand_ParseFail;
1855 int Val = CE->getValue();
1856 if (Val < Low || Val > High) {
1857 Error(Loc, "immediate value out of range");
1858 return MatchOperand_ParseFail;
1861 Operands.push_back(ARMOperand::CreateImm(CE, Loc, Parser.getTok().getLoc()));
1863 return MatchOperand_Success;
1866 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1867 parseSetEndImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1868 const AsmToken &Tok = Parser.getTok();
1869 SMLoc S = Tok.getLoc();
1870 if (Tok.isNot(AsmToken::Identifier)) {
1871 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1872 return MatchOperand_ParseFail;
1874 int Val = StringSwitch<int>(Tok.getString())
1878 Parser.Lex(); // Eat the token.
1881 Error(Tok.getLoc(), "'be' or 'le' operand expected");
1882 return MatchOperand_ParseFail;
1884 Operands.push_back(ARMOperand::CreateImm(MCConstantExpr::Create(Val,
1886 S, Parser.getTok().getLoc()));
1887 return MatchOperand_Success;
1890 /// parseShifterImm - Parse the shifter immediate operand for SSAT/USAT
1891 /// instructions. Legal values are:
1892 /// lsl #n 'n' in [0,31]
1893 /// asr #n 'n' in [1,32]
1894 /// n == 32 encoded as n == 0.
1895 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1896 parseShifterImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1897 const AsmToken &Tok = Parser.getTok();
1898 SMLoc S = Tok.getLoc();
1899 if (Tok.isNot(AsmToken::Identifier)) {
1900 Error(S, "shift operator 'asr' or 'lsl' expected");
1901 return MatchOperand_ParseFail;
1903 StringRef ShiftName = Tok.getString();
1905 if (ShiftName == "lsl" || ShiftName == "LSL")
1907 else if (ShiftName == "asr" || ShiftName == "ASR")
1910 Error(S, "shift operator 'asr' or 'lsl' expected");
1911 return MatchOperand_ParseFail;
1913 Parser.Lex(); // Eat the operator.
1915 // A '#' and a shift amount.
1916 if (Parser.getTok().isNot(AsmToken::Hash)) {
1917 Error(Parser.getTok().getLoc(), "'#' expected");
1918 return MatchOperand_ParseFail;
1920 Parser.Lex(); // Eat hash token.
1922 const MCExpr *ShiftAmount;
1923 SMLoc E = Parser.getTok().getLoc();
1924 if (getParser().ParseExpression(ShiftAmount)) {
1925 Error(E, "malformed shift expression");
1926 return MatchOperand_ParseFail;
1928 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1930 Error(E, "shift amount must be an immediate");
1931 return MatchOperand_ParseFail;
1934 int64_t Val = CE->getValue();
1936 // Shift amount must be in [1,32]
1937 if (Val < 1 || Val > 32) {
1938 Error(E, "'asr' shift amount must be in range [1,32]");
1939 return MatchOperand_ParseFail;
1941 // asr #32 encoded as asr #0.
1942 if (Val == 32) Val = 0;
1944 // Shift amount must be in [1,32]
1945 if (Val < 0 || Val > 31) {
1946 Error(E, "'lsr' shift amount must be in range [0,31]");
1947 return MatchOperand_ParseFail;
1951 E = Parser.getTok().getLoc();
1952 Operands.push_back(ARMOperand::CreateShifterImm(isASR, Val, S, E));
1954 return MatchOperand_Success;
1957 /// parseRotImm - Parse the shifter immediate operand for SXTB/UXTB family
1958 /// of instructions. Legal values are:
1959 /// ror #n 'n' in {0, 8, 16, 24}
1960 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
1961 parseRotImm(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1962 const AsmToken &Tok = Parser.getTok();
1963 SMLoc S = Tok.getLoc();
1964 if (Tok.isNot(AsmToken::Identifier)) {
1965 Error(S, "rotate operator 'ror' expected");
1966 return MatchOperand_ParseFail;
1968 StringRef ShiftName = Tok.getString();
1969 if (ShiftName != "ror" && ShiftName != "ROR") {
1970 Error(S, "rotate operator 'ror' expected");
1971 return MatchOperand_ParseFail;
1973 Parser.Lex(); // Eat the operator.
1975 // A '#' and a rotate amount.
1976 if (Parser.getTok().isNot(AsmToken::Hash)) {
1977 Error(Parser.getTok().getLoc(), "'#' expected");
1978 return MatchOperand_ParseFail;
1980 Parser.Lex(); // Eat hash token.
1982 const MCExpr *ShiftAmount;
1983 SMLoc E = Parser.getTok().getLoc();
1984 if (getParser().ParseExpression(ShiftAmount)) {
1985 Error(E, "malformed rotate expression");
1986 return MatchOperand_ParseFail;
1988 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(ShiftAmount);
1990 Error(E, "rotate amount must be an immediate");
1991 return MatchOperand_ParseFail;
1994 int64_t Val = CE->getValue();
1995 // Shift amount must be in {0, 8, 16, 24} (0 is undocumented extension)
1996 // normally, zero is represented in asm by omitting the rotate operand
1998 if (Val != 8 && Val != 16 && Val != 24 && Val != 0) {
1999 Error(E, "'ror' rotate amount must be 8, 16, or 24");
2000 return MatchOperand_ParseFail;
2003 E = Parser.getTok().getLoc();
2004 Operands.push_back(ARMOperand::CreateRotImm(Val, S, E));
2006 return MatchOperand_Success;
2009 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2010 parseBitfield(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2011 SMLoc S = Parser.getTok().getLoc();
2012 // The bitfield descriptor is really two operands, the LSB and the width.
2013 if (Parser.getTok().isNot(AsmToken::Hash)) {
2014 Error(Parser.getTok().getLoc(), "'#' expected");
2015 return MatchOperand_ParseFail;
2017 Parser.Lex(); // Eat hash token.
2019 const MCExpr *LSBExpr;
2020 SMLoc E = Parser.getTok().getLoc();
2021 if (getParser().ParseExpression(LSBExpr)) {
2022 Error(E, "malformed immediate expression");
2023 return MatchOperand_ParseFail;
2025 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(LSBExpr);
2027 Error(E, "'lsb' operand must be an immediate");
2028 return MatchOperand_ParseFail;
2031 int64_t LSB = CE->getValue();
2032 // The LSB must be in the range [0,31]
2033 if (LSB < 0 || LSB > 31) {
2034 Error(E, "'lsb' operand must be in the range [0,31]");
2035 return MatchOperand_ParseFail;
2037 E = Parser.getTok().getLoc();
2039 // Expect another immediate operand.
2040 if (Parser.getTok().isNot(AsmToken::Comma)) {
2041 Error(Parser.getTok().getLoc(), "too few operands");
2042 return MatchOperand_ParseFail;
2044 Parser.Lex(); // Eat hash token.
2045 if (Parser.getTok().isNot(AsmToken::Hash)) {
2046 Error(Parser.getTok().getLoc(), "'#' expected");
2047 return MatchOperand_ParseFail;
2049 Parser.Lex(); // Eat hash token.
2051 const MCExpr *WidthExpr;
2052 if (getParser().ParseExpression(WidthExpr)) {
2053 Error(E, "malformed immediate expression");
2054 return MatchOperand_ParseFail;
2056 CE = dyn_cast<MCConstantExpr>(WidthExpr);
2058 Error(E, "'width' operand must be an immediate");
2059 return MatchOperand_ParseFail;
2062 int64_t Width = CE->getValue();
2063 // The LSB must be in the range [1,32-lsb]
2064 if (Width < 1 || Width > 32 - LSB) {
2065 Error(E, "'width' operand must be in the range [1,32-lsb]");
2066 return MatchOperand_ParseFail;
2068 E = Parser.getTok().getLoc();
2070 Operands.push_back(ARMOperand::CreateBitfield(LSB, Width, S, E));
2072 return MatchOperand_Success;
2075 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2076 parsePostIdxReg(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2077 // Check for a post-index addressing register operand. Specifically:
2078 // postidx_reg := '+' register {, shift}
2079 // | '-' register {, shift}
2080 // | register {, shift}
2082 // This method must return MatchOperand_NoMatch without consuming any tokens
2083 // in the case where there is no match, as other alternatives take other
2085 AsmToken Tok = Parser.getTok();
2086 SMLoc S = Tok.getLoc();
2087 bool haveEaten = false;
2090 if (Tok.is(AsmToken::Plus)) {
2091 Parser.Lex(); // Eat the '+' token.
2093 } else if (Tok.is(AsmToken::Minus)) {
2094 Parser.Lex(); // Eat the '-' token.
2098 if (Parser.getTok().is(AsmToken::Identifier))
2099 Reg = tryParseRegister();
2102 return MatchOperand_NoMatch;
2103 Error(Parser.getTok().getLoc(), "register expected");
2104 return MatchOperand_ParseFail;
2106 SMLoc E = Parser.getTok().getLoc();
2108 ARM_AM::ShiftOpc ShiftTy = ARM_AM::no_shift;
2109 unsigned ShiftImm = 0;
2110 if (Parser.getTok().is(AsmToken::Comma)) {
2111 Parser.Lex(); // Eat the ','.
2112 if (parseMemRegOffsetShift(ShiftTy, ShiftImm))
2113 return MatchOperand_ParseFail;
2116 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ShiftTy,
2119 return MatchOperand_Success;
2122 ARMAsmParser::OperandMatchResultTy ARMAsmParser::
2123 parseAM3Offset(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2124 // Check for a post-index addressing register operand. Specifically:
2125 // am3offset := '+' register
2132 // This method must return MatchOperand_NoMatch without consuming any tokens
2133 // in the case where there is no match, as other alternatives take other
2135 AsmToken Tok = Parser.getTok();
2136 SMLoc S = Tok.getLoc();
2138 // Do immediates first, as we always parse those if we have a '#'.
2139 if (Parser.getTok().is(AsmToken::Hash)) {
2140 Parser.Lex(); // Eat the '#'.
2141 // Explicitly look for a '-', as we need to encode negative zero
2143 bool isNegative = Parser.getTok().is(AsmToken::Minus);
2144 const MCExpr *Offset;
2145 if (getParser().ParseExpression(Offset))
2146 return MatchOperand_ParseFail;
2147 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2149 Error(S, "constant expression expected");
2150 return MatchOperand_ParseFail;
2152 SMLoc E = Tok.getLoc();
2153 // Negative zero is encoded as the flag value INT32_MIN.
2154 int32_t Val = CE->getValue();
2155 if (isNegative && Val == 0)
2159 ARMOperand::CreateImm(MCConstantExpr::Create(Val, getContext()), S, E));
2161 return MatchOperand_Success;
2165 bool haveEaten = false;
2168 if (Tok.is(AsmToken::Plus)) {
2169 Parser.Lex(); // Eat the '+' token.
2171 } else if (Tok.is(AsmToken::Minus)) {
2172 Parser.Lex(); // Eat the '-' token.
2176 if (Parser.getTok().is(AsmToken::Identifier))
2177 Reg = tryParseRegister();
2180 return MatchOperand_NoMatch;
2181 Error(Parser.getTok().getLoc(), "register expected");
2182 return MatchOperand_ParseFail;
2184 SMLoc E = Parser.getTok().getLoc();
2186 Operands.push_back(ARMOperand::CreatePostIdxReg(Reg, isAdd, ARM_AM::no_shift,
2189 return MatchOperand_Success;
2192 /// cvtLdWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2193 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2194 /// when they refer multiple MIOperands inside a single one.
2196 cvtLdWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2197 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2198 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2200 // Create a writeback register dummy placeholder.
2201 Inst.addOperand(MCOperand::CreateImm(0));
2203 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2204 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2208 /// cvtStWriteBackRegAddrModeImm12 - Convert parsed operands to MCInst.
2209 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2210 /// when they refer multiple MIOperands inside a single one.
2212 cvtStWriteBackRegAddrModeImm12(MCInst &Inst, unsigned Opcode,
2213 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2214 // Create a writeback register dummy placeholder.
2215 Inst.addOperand(MCOperand::CreateImm(0));
2216 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2217 ((ARMOperand*)Operands[3])->addMemImm12OffsetOperands(Inst, 2);
2218 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2222 /// cvtStWriteBackRegAddrMode2 - Convert parsed operands to MCInst.
2223 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2224 /// when they refer multiple MIOperands inside a single one.
2226 cvtStWriteBackRegAddrMode2(MCInst &Inst, unsigned Opcode,
2227 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2228 // Create a writeback register dummy placeholder.
2229 Inst.addOperand(MCOperand::CreateImm(0));
2230 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2231 ((ARMOperand*)Operands[3])->addAddrMode2Operands(Inst, 3);
2232 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2236 /// cvtStWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2237 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2238 /// when they refer multiple MIOperands inside a single one.
2240 cvtStWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2241 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2242 // Create a writeback register dummy placeholder.
2243 Inst.addOperand(MCOperand::CreateImm(0));
2244 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2245 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2246 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2250 /// cvtLdExtTWriteBackImm - Convert parsed operands to MCInst.
2251 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2252 /// when they refer multiple MIOperands inside a single one.
2254 cvtLdExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2255 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2257 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2258 // Create a writeback register dummy placeholder.
2259 Inst.addOperand(MCOperand::CreateImm(0));
2261 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2263 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2265 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2269 /// cvtLdExtTWriteBackReg - Convert parsed operands to MCInst.
2270 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2271 /// when they refer multiple MIOperands inside a single one.
2273 cvtLdExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2274 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2276 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2277 // Create a writeback register dummy placeholder.
2278 Inst.addOperand(MCOperand::CreateImm(0));
2280 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2282 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2284 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2288 /// cvtStExtTWriteBackImm - Convert parsed operands to MCInst.
2289 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2290 /// when they refer multiple MIOperands inside a single one.
2292 cvtStExtTWriteBackImm(MCInst &Inst, unsigned Opcode,
2293 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2294 // Create a writeback register dummy placeholder.
2295 Inst.addOperand(MCOperand::CreateImm(0));
2297 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2299 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2301 ((ARMOperand*)Operands[4])->addPostIdxImm8Operands(Inst, 1);
2303 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2307 /// cvtStExtTWriteBackReg - Convert parsed operands to MCInst.
2308 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2309 /// when they refer multiple MIOperands inside a single one.
2311 cvtStExtTWriteBackReg(MCInst &Inst, unsigned Opcode,
2312 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2313 // Create a writeback register dummy placeholder.
2314 Inst.addOperand(MCOperand::CreateImm(0));
2316 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2318 ((ARMOperand*)Operands[3])->addMemNoOffsetOperands(Inst, 1);
2320 ((ARMOperand*)Operands[4])->addPostIdxRegOperands(Inst, 2);
2322 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2326 /// cvtLdrdPre - Convert parsed operands to MCInst.
2327 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2328 /// when they refer multiple MIOperands inside a single one.
2330 cvtLdrdPre(MCInst &Inst, unsigned Opcode,
2331 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2333 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2334 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2335 // Create a writeback register dummy placeholder.
2336 Inst.addOperand(MCOperand::CreateImm(0));
2338 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2340 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2344 /// cvtStrdPre - Convert parsed operands to MCInst.
2345 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2346 /// when they refer multiple MIOperands inside a single one.
2348 cvtStrdPre(MCInst &Inst, unsigned Opcode,
2349 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2350 // Create a writeback register dummy placeholder.
2351 Inst.addOperand(MCOperand::CreateImm(0));
2353 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2354 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2356 ((ARMOperand*)Operands[4])->addAddrMode3Operands(Inst, 3);
2358 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2362 /// cvtLdWriteBackRegAddrMode3 - Convert parsed operands to MCInst.
2363 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2364 /// when they refer multiple MIOperands inside a single one.
2366 cvtLdWriteBackRegAddrMode3(MCInst &Inst, unsigned Opcode,
2367 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2368 ((ARMOperand*)Operands[2])->addRegOperands(Inst, 1);
2369 // Create a writeback register dummy placeholder.
2370 Inst.addOperand(MCOperand::CreateImm(0));
2371 ((ARMOperand*)Operands[3])->addAddrMode3Operands(Inst, 3);
2372 ((ARMOperand*)Operands[1])->addCondCodeOperands(Inst, 2);
2376 /// cvtThumbMultiple- Convert parsed operands to MCInst.
2377 /// Needed here because the Asm Gen Matcher can't handle properly tied operands
2378 /// when they refer multiple MIOperands inside a single one.
2380 cvtThumbMultiply(MCInst &Inst, unsigned Opcode,
2381 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2382 // The second source operand must be the same register as the destination
2384 if (Operands.size() == 6 &&
2385 (((ARMOperand*)Operands[3])->getReg() !=
2386 ((ARMOperand*)Operands[5])->getReg()) &&
2387 (((ARMOperand*)Operands[3])->getReg() !=
2388 ((ARMOperand*)Operands[4])->getReg())) {
2389 Error(Operands[3]->getStartLoc(),
2390 "destination register must match source register");
2393 ((ARMOperand*)Operands[3])->addRegOperands(Inst, 1);
2394 ((ARMOperand*)Operands[1])->addCCOutOperands(Inst, 1);
2395 ((ARMOperand*)Operands[4])->addRegOperands(Inst, 1);
2396 // If we have a three-operand form, use that, else the second source operand
2397 // is just the destination operand again.
2398 if (Operands.size() == 6)
2399 ((ARMOperand*)Operands[5])->addRegOperands(Inst, 1);
2401 Inst.addOperand(Inst.getOperand(0));
2402 ((ARMOperand*)Operands[2])->addCondCodeOperands(Inst, 2);
2407 /// Parse an ARM memory expression, return false if successful else return true
2408 /// or an error. The first token must be a '[' when called.
2410 parseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2412 assert(Parser.getTok().is(AsmToken::LBrac) &&
2413 "Token is not a Left Bracket");
2414 S = Parser.getTok().getLoc();
2415 Parser.Lex(); // Eat left bracket token.
2417 const AsmToken &BaseRegTok = Parser.getTok();
2418 int BaseRegNum = tryParseRegister();
2419 if (BaseRegNum == -1)
2420 return Error(BaseRegTok.getLoc(), "register expected");
2422 // The next token must either be a comma or a closing bracket.
2423 const AsmToken &Tok = Parser.getTok();
2424 if (!Tok.is(AsmToken::Comma) && !Tok.is(AsmToken::RBrac))
2425 return Error(Tok.getLoc(), "malformed memory operand");
2427 if (Tok.is(AsmToken::RBrac)) {
2429 Parser.Lex(); // Eat right bracket token.
2431 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, 0, ARM_AM::no_shift,
2437 assert(Tok.is(AsmToken::Comma) && "Lost comma in memory operand?!");
2438 Parser.Lex(); // Eat the comma.
2440 // If we have a '#' it's an immediate offset, else assume it's a register
2442 if (Parser.getTok().is(AsmToken::Hash)) {
2443 Parser.Lex(); // Eat the '#'.
2444 E = Parser.getTok().getLoc();
2446 // FIXME: Special case #-0 so we can correctly set the U bit.
2448 const MCExpr *Offset;
2449 if (getParser().ParseExpression(Offset))
2452 // The expression has to be a constant. Memory references with relocations
2453 // don't come through here, as they use the <label> forms of the relevant
2455 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Offset);
2457 return Error (E, "constant expression expected");
2459 // Now we should have the closing ']'
2460 E = Parser.getTok().getLoc();
2461 if (Parser.getTok().isNot(AsmToken::RBrac))
2462 return Error(E, "']' expected");
2463 Parser.Lex(); // Eat right bracket token.
2465 // Don't worry about range checking the value here. That's handled by
2466 // the is*() predicates.
2467 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, CE, 0,
2468 ARM_AM::no_shift, 0, false, S,E));
2470 // If there's a pre-indexing writeback marker, '!', just add it as a token
2472 if (Parser.getTok().is(AsmToken::Exclaim)) {
2473 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2474 Parser.Lex(); // Eat the '!'.
2480 // The register offset is optionally preceded by a '+' or '-'
2481 bool isNegative = false;
2482 if (Parser.getTok().is(AsmToken::Minus)) {
2484 Parser.Lex(); // Eat the '-'.
2485 } else if (Parser.getTok().is(AsmToken::Plus)) {
2487 Parser.Lex(); // Eat the '+'.
2490 E = Parser.getTok().getLoc();
2491 int OffsetRegNum = tryParseRegister();
2492 if (OffsetRegNum == -1)
2493 return Error(E, "register expected");
2495 // If there's a shift operator, handle it.
2496 ARM_AM::ShiftOpc ShiftType = ARM_AM::no_shift;
2497 unsigned ShiftImm = 0;
2498 if (Parser.getTok().is(AsmToken::Comma)) {
2499 Parser.Lex(); // Eat the ','.
2500 if (parseMemRegOffsetShift(ShiftType, ShiftImm))
2504 // Now we should have the closing ']'
2505 E = Parser.getTok().getLoc();
2506 if (Parser.getTok().isNot(AsmToken::RBrac))
2507 return Error(E, "']' expected");
2508 Parser.Lex(); // Eat right bracket token.
2510 Operands.push_back(ARMOperand::CreateMem(BaseRegNum, 0, OffsetRegNum,
2511 ShiftType, ShiftImm, isNegative,
2514 // If there's a pre-indexing writeback marker, '!', just add it as a token
2516 if (Parser.getTok().is(AsmToken::Exclaim)) {
2517 Operands.push_back(ARMOperand::CreateToken("!",Parser.getTok().getLoc()));
2518 Parser.Lex(); // Eat the '!'.
2524 /// parseMemRegOffsetShift - one of these two:
2525 /// ( lsl | lsr | asr | ror ) , # shift_amount
2527 /// return true if it parses a shift otherwise it returns false.
2528 bool ARMAsmParser::parseMemRegOffsetShift(ARM_AM::ShiftOpc &St,
2530 SMLoc Loc = Parser.getTok().getLoc();
2531 const AsmToken &Tok = Parser.getTok();
2532 if (Tok.isNot(AsmToken::Identifier))
2534 StringRef ShiftName = Tok.getString();
2535 if (ShiftName == "lsl" || ShiftName == "LSL")
2537 else if (ShiftName == "lsr" || ShiftName == "LSR")
2539 else if (ShiftName == "asr" || ShiftName == "ASR")
2541 else if (ShiftName == "ror" || ShiftName == "ROR")
2543 else if (ShiftName == "rrx" || ShiftName == "RRX")
2546 return Error(Loc, "illegal shift operator");
2547 Parser.Lex(); // Eat shift type token.
2549 // rrx stands alone.
2551 if (St != ARM_AM::rrx) {
2552 Loc = Parser.getTok().getLoc();
2553 // A '#' and a shift amount.
2554 const AsmToken &HashTok = Parser.getTok();
2555 if (HashTok.isNot(AsmToken::Hash))
2556 return Error(HashTok.getLoc(), "'#' expected");
2557 Parser.Lex(); // Eat hash token.
2560 if (getParser().ParseExpression(Expr))
2562 // Range check the immediate.
2563 // lsl, ror: 0 <= imm <= 31
2564 // lsr, asr: 0 <= imm <= 32
2565 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
2567 return Error(Loc, "shift amount must be an immediate");
2568 int64_t Imm = CE->getValue();
2570 ((St == ARM_AM::lsl || St == ARM_AM::ror) && Imm > 31) ||
2571 ((St == ARM_AM::lsr || St == ARM_AM::asr) && Imm > 32))
2572 return Error(Loc, "immediate shift value out of range");
2579 /// Parse a arm instruction operand. For now this parses the operand regardless
2580 /// of the mnemonic.
2581 bool ARMAsmParser::parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
2582 StringRef Mnemonic) {
2585 // Check if the current operand has a custom associated parser, if so, try to
2586 // custom parse the operand, or fallback to the general approach.
2587 OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
2588 if (ResTy == MatchOperand_Success)
2590 // If there wasn't a custom match, try the generic matcher below. Otherwise,
2591 // there was a match, but an error occurred, in which case, just return that
2592 // the operand parsing failed.
2593 if (ResTy == MatchOperand_ParseFail)
2596 switch (getLexer().getKind()) {
2598 Error(Parser.getTok().getLoc(), "unexpected token in operand");
2600 case AsmToken::Identifier: {
2601 if (!tryParseRegisterWithWriteBack(Operands))
2603 int Res = tryParseShiftRegister(Operands);
2604 if (Res == 0) // success
2606 else if (Res == -1) // irrecoverable error
2609 // Fall though for the Identifier case that is not a register or a
2612 case AsmToken::Integer: // things like 1f and 2b as a branch targets
2613 case AsmToken::Dot: { // . as a branch target
2614 // This was not a register so parse other operands that start with an
2615 // identifier (like labels) as expressions and create them as immediates.
2616 const MCExpr *IdVal;
2617 S = Parser.getTok().getLoc();
2618 if (getParser().ParseExpression(IdVal))
2620 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2621 Operands.push_back(ARMOperand::CreateImm(IdVal, S, E));
2624 case AsmToken::LBrac:
2625 return parseMemory(Operands);
2626 case AsmToken::LCurly:
2627 return parseRegisterList(Operands);
2628 case AsmToken::Hash:
2629 // #42 -> immediate.
2630 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
2631 S = Parser.getTok().getLoc();
2633 const MCExpr *ImmVal;
2634 if (getParser().ParseExpression(ImmVal))
2636 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2637 Operands.push_back(ARMOperand::CreateImm(ImmVal, S, E));
2639 case AsmToken::Colon: {
2640 // ":lower16:" and ":upper16:" expression prefixes
2641 // FIXME: Check it's an expression prefix,
2642 // e.g. (FOO - :lower16:BAR) isn't legal.
2643 ARMMCExpr::VariantKind RefKind;
2644 if (parsePrefix(RefKind))
2647 const MCExpr *SubExprVal;
2648 if (getParser().ParseExpression(SubExprVal))
2651 const MCExpr *ExprVal = ARMMCExpr::Create(RefKind, SubExprVal,
2653 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
2654 Operands.push_back(ARMOperand::CreateImm(ExprVal, S, E));
2660 // parsePrefix - Parse ARM 16-bit relocations expression prefix, i.e.
2661 // :lower16: and :upper16:.
2662 bool ARMAsmParser::parsePrefix(ARMMCExpr::VariantKind &RefKind) {
2663 RefKind = ARMMCExpr::VK_ARM_None;
2665 // :lower16: and :upper16: modifiers
2666 assert(getLexer().is(AsmToken::Colon) && "expected a :");
2667 Parser.Lex(); // Eat ':'
2669 if (getLexer().isNot(AsmToken::Identifier)) {
2670 Error(Parser.getTok().getLoc(), "expected prefix identifier in operand");
2674 StringRef IDVal = Parser.getTok().getIdentifier();
2675 if (IDVal == "lower16") {
2676 RefKind = ARMMCExpr::VK_ARM_LO16;
2677 } else if (IDVal == "upper16") {
2678 RefKind = ARMMCExpr::VK_ARM_HI16;
2680 Error(Parser.getTok().getLoc(), "unexpected prefix in operand");
2685 if (getLexer().isNot(AsmToken::Colon)) {
2686 Error(Parser.getTok().getLoc(), "unexpected token after prefix");
2689 Parser.Lex(); // Eat the last ':'
2694 ARMAsmParser::applyPrefixToExpr(const MCExpr *E,
2695 MCSymbolRefExpr::VariantKind Variant) {
2696 // Recurse over the given expression, rebuilding it to apply the given variant
2697 // to the leftmost symbol.
2698 if (Variant == MCSymbolRefExpr::VK_None)
2701 switch (E->getKind()) {
2702 case MCExpr::Target:
2703 llvm_unreachable("Can't handle target expr yet");
2704 case MCExpr::Constant:
2705 llvm_unreachable("Can't handle lower16/upper16 of constant yet");
2707 case MCExpr::SymbolRef: {
2708 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
2710 if (SRE->getKind() != MCSymbolRefExpr::VK_None)
2713 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
2717 llvm_unreachable("Can't handle unary expressions yet");
2719 case MCExpr::Binary: {
2720 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
2721 const MCExpr *LHS = applyPrefixToExpr(BE->getLHS(), Variant);
2722 const MCExpr *RHS = BE->getRHS();
2726 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
2730 assert(0 && "Invalid expression kind!");
2734 /// \brief Given a mnemonic, split out possible predication code and carry
2735 /// setting letters to form a canonical mnemonic and flags.
2737 // FIXME: Would be nice to autogen this.
2738 StringRef ARMAsmParser::splitMnemonic(StringRef Mnemonic,
2739 unsigned &PredicationCode,
2741 unsigned &ProcessorIMod) {
2742 PredicationCode = ARMCC::AL;
2743 CarrySetting = false;
2746 // Ignore some mnemonics we know aren't predicated forms.
2748 // FIXME: Would be nice to autogen this.
2749 if ((Mnemonic == "movs" && isThumb()) ||
2750 Mnemonic == "teq" || Mnemonic == "vceq" || Mnemonic == "svc" ||
2751 Mnemonic == "mls" || Mnemonic == "smmls" || Mnemonic == "vcls" ||
2752 Mnemonic == "vmls" || Mnemonic == "vnmls" || Mnemonic == "vacge" ||
2753 Mnemonic == "vcge" || Mnemonic == "vclt" || Mnemonic == "vacgt" ||
2754 Mnemonic == "vcgt" || Mnemonic == "vcle" || Mnemonic == "smlal" ||
2755 Mnemonic == "umaal" || Mnemonic == "umlal" || Mnemonic == "vabal" ||
2756 Mnemonic == "vmlal" || Mnemonic == "vpadal" || Mnemonic == "vqdmlal")
2759 // First, split out any predication code. Ignore mnemonics we know aren't
2760 // predicated but do have a carry-set and so weren't caught above.
2761 if (Mnemonic != "adcs" && Mnemonic != "bics" && Mnemonic != "movs" &&
2762 Mnemonic != "muls" && Mnemonic != "smlals" && Mnemonic != "smulls" &&
2763 Mnemonic != "umlals" && Mnemonic != "umulls" && Mnemonic != "lsls") {
2764 unsigned CC = StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2))
2765 .Case("eq", ARMCC::EQ)
2766 .Case("ne", ARMCC::NE)
2767 .Case("hs", ARMCC::HS)
2768 .Case("cs", ARMCC::HS)
2769 .Case("lo", ARMCC::LO)
2770 .Case("cc", ARMCC::LO)
2771 .Case("mi", ARMCC::MI)
2772 .Case("pl", ARMCC::PL)
2773 .Case("vs", ARMCC::VS)
2774 .Case("vc", ARMCC::VC)
2775 .Case("hi", ARMCC::HI)
2776 .Case("ls", ARMCC::LS)
2777 .Case("ge", ARMCC::GE)
2778 .Case("lt", ARMCC::LT)
2779 .Case("gt", ARMCC::GT)
2780 .Case("le", ARMCC::LE)
2781 .Case("al", ARMCC::AL)
2784 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 2);
2785 PredicationCode = CC;
2789 // Next, determine if we have a carry setting bit. We explicitly ignore all
2790 // the instructions we know end in 's'.
2791 if (Mnemonic.endswith("s") &&
2792 !(Mnemonic == "cps" || Mnemonic == "mls" ||
2793 Mnemonic == "mrs" || Mnemonic == "smmls" || Mnemonic == "vabs" ||
2794 Mnemonic == "vcls" || Mnemonic == "vmls" || Mnemonic == "vmrs" ||
2795 Mnemonic == "vnmls" || Mnemonic == "vqabs" || Mnemonic == "vrecps" ||
2796 Mnemonic == "vrsqrts" || Mnemonic == "srs" ||
2797 (Mnemonic == "movs" && isThumb()))) {
2798 Mnemonic = Mnemonic.slice(0, Mnemonic.size() - 1);
2799 CarrySetting = true;
2802 // The "cps" instruction can have a interrupt mode operand which is glued into
2803 // the mnemonic. Check if this is the case, split it and parse the imod op
2804 if (Mnemonic.startswith("cps")) {
2805 // Split out any imod code.
2807 StringSwitch<unsigned>(Mnemonic.substr(Mnemonic.size()-2, 2))
2808 .Case("ie", ARM_PROC::IE)
2809 .Case("id", ARM_PROC::ID)
2812 Mnemonic = Mnemonic.slice(0, Mnemonic.size()-2);
2813 ProcessorIMod = IMod;
2820 /// \brief Given a canonical mnemonic, determine if the instruction ever allows
2821 /// inclusion of carry set or predication code operands.
2823 // FIXME: It would be nice to autogen this.
2825 getMnemonicAcceptInfo(StringRef Mnemonic, bool &CanAcceptCarrySet,
2826 bool &CanAcceptPredicationCode) {
2827 if (Mnemonic == "and" || Mnemonic == "lsl" || Mnemonic == "lsr" ||
2828 Mnemonic == "rrx" || Mnemonic == "ror" || Mnemonic == "sub" ||
2829 Mnemonic == "smull" || Mnemonic == "add" || Mnemonic == "adc" ||
2830 Mnemonic == "mul" || Mnemonic == "bic" || Mnemonic == "asr" ||
2831 Mnemonic == "umlal" || Mnemonic == "orr" || Mnemonic == "mvn" ||
2832 Mnemonic == "rsb" || Mnemonic == "rsc" || Mnemonic == "orn" ||
2833 Mnemonic == "sbc" || Mnemonic == "mla" || Mnemonic == "umull" ||
2834 Mnemonic == "eor" || Mnemonic == "smlal" || Mnemonic == "neg" ||
2835 // FIXME: We need a better way. This really confused Thumb2
2836 // parsing for 'mov'.
2837 (Mnemonic == "mov" && !isThumbOne())) {
2838 CanAcceptCarrySet = true;
2840 CanAcceptCarrySet = false;
2843 if (Mnemonic == "cbnz" || Mnemonic == "setend" || Mnemonic == "dmb" ||
2844 Mnemonic == "cps" || Mnemonic == "mcr2" || Mnemonic == "it" ||
2845 Mnemonic == "mcrr2" || Mnemonic == "cbz" || Mnemonic == "cdp2" ||
2846 Mnemonic == "trap" || Mnemonic == "mrc2" || Mnemonic == "mrrc2" ||
2847 Mnemonic == "dsb" || Mnemonic == "isb" || Mnemonic == "clrex" ||
2848 Mnemonic == "setend" ||
2849 ((Mnemonic == "pld" || Mnemonic == "pli") && !isThumb()) ||
2850 ((Mnemonic.startswith("rfe") || Mnemonic.startswith("srs"))
2852 Mnemonic.startswith("cps") || (Mnemonic == "movs" && isThumb())) {
2853 CanAcceptPredicationCode = false;
2855 CanAcceptPredicationCode = true;
2859 if (Mnemonic == "bkpt" || Mnemonic == "mcr" || Mnemonic == "mcrr" ||
2860 Mnemonic == "mrc" || Mnemonic == "mrrc" || Mnemonic == "cdp")
2861 CanAcceptPredicationCode = false;
2864 bool ARMAsmParser::shouldOmitCCOutOperand(StringRef Mnemonic,
2865 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2867 // The 'mov' mnemonic is special. One variant has a cc_out operand, while
2868 // another does not. Specifically, the MOVW instruction does not. So we
2869 // special case it here and remove the defaulted (non-setting) cc_out
2870 // operand if that's the instruction we're trying to match.
2872 // We do this as post-processing of the explicit operands rather than just
2873 // conditionally adding the cc_out in the first place because we need
2874 // to check the type of the parsed immediate operand.
2875 if (Mnemonic == "mov" && Operands.size() > 4 &&
2876 !static_cast<ARMOperand*>(Operands[4])->isARMSOImm() &&
2877 static_cast<ARMOperand*>(Operands[4])->isImm0_65535Expr() &&
2878 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2881 // Register-register 'add' for thumb does not have a cc_out operand
2882 // when there are only two register operands.
2883 if (isThumb() && Mnemonic == "add" && Operands.size() == 5 &&
2884 static_cast<ARMOperand*>(Operands[3])->isReg() &&
2885 static_cast<ARMOperand*>(Operands[4])->isReg() &&
2886 static_cast<ARMOperand*>(Operands[1])->getReg() == 0)
2892 /// Parse an arm instruction mnemonic followed by its operands.
2893 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
2894 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
2895 // Create the leading tokens for the mnemonic, split by '.' characters.
2896 size_t Start = 0, Next = Name.find('.');
2897 StringRef Mnemonic = Name.slice(Start, Next);
2899 // Split out the predication code and carry setting flag from the mnemonic.
2900 unsigned PredicationCode;
2901 unsigned ProcessorIMod;
2903 Mnemonic = splitMnemonic(Mnemonic, PredicationCode, CarrySetting,
2906 Operands.push_back(ARMOperand::CreateToken(Mnemonic, NameLoc));
2908 // FIXME: This is all a pretty gross hack. We should automatically handle
2909 // optional operands like this via tblgen.
2911 // Next, add the CCOut and ConditionCode operands, if needed.
2913 // For mnemonics which can ever incorporate a carry setting bit or predication
2914 // code, our matching model involves us always generating CCOut and
2915 // ConditionCode operands to match the mnemonic "as written" and then we let
2916 // the matcher deal with finding the right instruction or generating an
2917 // appropriate error.
2918 bool CanAcceptCarrySet, CanAcceptPredicationCode;
2919 getMnemonicAcceptInfo(Mnemonic, CanAcceptCarrySet, CanAcceptPredicationCode);
2921 // If we had a carry-set on an instruction that can't do that, issue an
2923 if (!CanAcceptCarrySet && CarrySetting) {
2924 Parser.EatToEndOfStatement();
2925 return Error(NameLoc, "instruction '" + Mnemonic +
2926 "' can not set flags, but 's' suffix specified");
2928 // If we had a predication code on an instruction that can't do that, issue an
2930 if (!CanAcceptPredicationCode && PredicationCode != ARMCC::AL) {
2931 Parser.EatToEndOfStatement();
2932 return Error(NameLoc, "instruction '" + Mnemonic +
2933 "' is not predicable, but condition code specified");
2936 // Add the carry setting operand, if necessary.
2938 // FIXME: It would be awesome if we could somehow invent a location such that
2939 // match errors on this operand would print a nice diagnostic about how the
2940 // 's' character in the mnemonic resulted in a CCOut operand.
2941 if (CanAcceptCarrySet)
2942 Operands.push_back(ARMOperand::CreateCCOut(CarrySetting ? ARM::CPSR : 0,
2945 // Add the predication code operand, if necessary.
2946 if (CanAcceptPredicationCode) {
2947 Operands.push_back(ARMOperand::CreateCondCode(
2948 ARMCC::CondCodes(PredicationCode), NameLoc));
2951 // Add the processor imod operand, if necessary.
2952 if (ProcessorIMod) {
2953 Operands.push_back(ARMOperand::CreateImm(
2954 MCConstantExpr::Create(ProcessorIMod, getContext()),
2957 // This mnemonic can't ever accept a imod, but the user wrote
2958 // one (or misspelled another mnemonic).
2960 // FIXME: Issue a nice error.
2963 // Add the remaining tokens in the mnemonic.
2964 while (Next != StringRef::npos) {
2966 Next = Name.find('.', Start + 1);
2967 StringRef ExtraToken = Name.slice(Start, Next);
2969 Operands.push_back(ARMOperand::CreateToken(ExtraToken, NameLoc));
2972 // Read the remaining operands.
2973 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2974 // Read the first operand.
2975 if (parseOperand(Operands, Mnemonic)) {
2976 Parser.EatToEndOfStatement();
2980 while (getLexer().is(AsmToken::Comma)) {
2981 Parser.Lex(); // Eat the comma.
2983 // Parse and remember the operand.
2984 if (parseOperand(Operands, Mnemonic)) {
2985 Parser.EatToEndOfStatement();
2991 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2992 Parser.EatToEndOfStatement();
2993 return TokError("unexpected token in argument list");
2996 Parser.Lex(); // Consume the EndOfStatement
2998 // Some instructions, mostly Thumb, have forms for the same mnemonic that
2999 // do and don't have a cc_out optional-def operand. With some spot-checks
3000 // of the operand list, we can figure out which variant we're trying to
3001 // parse and adjust accordingly before actually matching. Reason number
3002 // #317 the table driven matcher doesn't fit well with the ARM instruction
3004 if (shouldOmitCCOutOperand(Mnemonic, Operands)) {
3005 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3006 Operands.erase(Operands.begin() + 1);
3010 // ARM mode 'blx' need special handling, as the register operand version
3011 // is predicable, but the label operand version is not. So, we can't rely
3012 // on the Mnemonic based checking to correctly figure out when to put
3013 // a CondCode operand in the list. If we're trying to match the label
3014 // version, remove the CondCode operand here.
3015 if (!isThumb() && Mnemonic == "blx" && Operands.size() == 3 &&
3016 static_cast<ARMOperand*>(Operands[2])->isImm()) {
3017 ARMOperand *Op = static_cast<ARMOperand*>(Operands[1]);
3018 Operands.erase(Operands.begin() + 1);
3022 // The vector-compare-to-zero instructions have a literal token "#0" at
3023 // the end that comes to here as an immediate operand. Convert it to a
3024 // token to play nicely with the matcher.
3025 if ((Mnemonic == "vceq" || Mnemonic == "vcge" || Mnemonic == "vcgt" ||
3026 Mnemonic == "vcle" || Mnemonic == "vclt") && Operands.size() == 6 &&
3027 static_cast<ARMOperand*>(Operands[5])->isImm()) {
3028 ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
3029 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
3030 if (CE && CE->getValue() == 0) {
3031 Operands.erase(Operands.begin() + 5);
3032 Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
3039 // Validate context-sensitive operand constraints.
3040 // FIXME: We would really like to be able to tablegen'erate this.
3042 validateInstruction(MCInst &Inst,
3043 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3044 switch (Inst.getOpcode()) {
3047 case ARM::LDRD_POST:
3049 // Rt2 must be Rt + 1.
3050 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3051 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3053 return Error(Operands[3]->getStartLoc(),
3054 "destination operands must be sequential");
3058 // Rt2 must be Rt + 1.
3059 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(0).getReg());
3060 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3062 return Error(Operands[3]->getStartLoc(),
3063 "source operands must be sequential");
3067 case ARM::STRD_POST:
3069 // Rt2 must be Rt + 1.
3070 unsigned Rt = getARMRegisterNumbering(Inst.getOperand(1).getReg());
3071 unsigned Rt2 = getARMRegisterNumbering(Inst.getOperand(2).getReg());
3073 return Error(Operands[3]->getStartLoc(),
3074 "source operands must be sequential");
3079 // width must be in range [1, 32-lsb]
3080 unsigned lsb = Inst.getOperand(2).getImm();
3081 unsigned widthm1 = Inst.getOperand(3).getImm();
3082 if (widthm1 >= 32 - lsb)
3083 return Error(Operands[5]->getStartLoc(),
3084 "bitfield width must be in range [1,32-lsb]");
3088 // Thumb LDM instructions are writeback iff the base register is not
3089 // in the register list.
3090 unsigned Rn = Inst.getOperand(0).getReg();
3091 bool doesWriteback = true;
3092 for (unsigned i = 3; i < Inst.getNumOperands(); ++i) {
3093 unsigned Reg = Inst.getOperand(i).getReg();
3095 doesWriteback = false;
3096 // Anything other than a low register isn't legal here.
3097 if (!isARMLowRegister(Reg))
3098 return Error(Operands[4]->getStartLoc(),
3099 "registers must be in range r0-r7");
3101 // If we should have writeback, then there should be a '!' token.
3102 if (doesWriteback &&
3103 (!static_cast<ARMOperand*>(Operands[3])->isToken() ||
3104 static_cast<ARMOperand*>(Operands[3])->getToken() != "!"))
3105 return Error(Operands[2]->getStartLoc(),
3106 "writeback operator '!' expected");
3116 processInstruction(MCInst &Inst,
3117 const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
3118 switch (Inst.getOpcode()) {
3119 case ARM::LDMIA_UPD:
3120 // If this is a load of a single register via a 'pop', then we should use
3121 // a post-indexed LDR instruction instead, per the ARM ARM.
3122 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "pop" &&
3123 Inst.getNumOperands() == 5) {
3125 TmpInst.setOpcode(ARM::LDR_POST_IMM);
3126 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3127 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3128 TmpInst.addOperand(Inst.getOperand(1)); // Rn
3129 TmpInst.addOperand(MCOperand::CreateReg(0)); // am2offset
3130 TmpInst.addOperand(MCOperand::CreateImm(4));
3131 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3132 TmpInst.addOperand(Inst.getOperand(3));
3136 case ARM::STMDB_UPD:
3137 // If this is a store of a single register via a 'push', then we should use
3138 // a pre-indexed STR instruction instead, per the ARM ARM.
3139 if (static_cast<ARMOperand*>(Operands[0])->getToken() == "push" &&
3140 Inst.getNumOperands() == 5) {
3142 TmpInst.setOpcode(ARM::STR_PRE_IMM);
3143 TmpInst.addOperand(Inst.getOperand(0)); // Rn_wb
3144 TmpInst.addOperand(Inst.getOperand(4)); // Rt
3145 TmpInst.addOperand(Inst.getOperand(1)); // addrmode_imm12
3146 TmpInst.addOperand(MCOperand::CreateImm(-4));
3147 TmpInst.addOperand(Inst.getOperand(2)); // CondCode
3148 TmpInst.addOperand(Inst.getOperand(3));
3153 // If the immediate is in the range 0-7, we really wanted tADDi3.
3154 if (Inst.getOperand(3).getImm() < 8)
3155 Inst.setOpcode(ARM::tADDi3);
3158 // If the conditional is AL, we really want tB.
3159 if (Inst.getOperand(1).getImm() == ARMCC::AL)
3160 Inst.setOpcode(ARM::tB);
3165 // FIXME: We would really prefer to have MCInstrInfo (the wrapper around
3166 // the ARMInsts array) instead. Getting that here requires awkward
3167 // API changes, though. Better way?
3169 extern MCInstrDesc ARMInsts[];
3171 static MCInstrDesc &getInstDesc(unsigned Opcode) {
3172 return ARMInsts[Opcode];
3175 unsigned ARMAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
3176 // 16-bit thumb arithmetic instructions either require or preclude the 'S'
3177 // suffix depending on whether they're in an IT block or not.
3178 unsigned Opc = Inst.getOpcode();
3179 MCInstrDesc &MCID = getInstDesc(Opc);
3180 if (MCID.TSFlags & ARMII::ThumbArithFlagSetting) {
3181 assert(MCID.hasOptionalDef() &&
3182 "optionally flag setting instruction missing optional def operand");
3183 assert(MCID.NumOperands == Inst.getNumOperands() &&
3184 "operand count mismatch!");
3185 // Find the optional-def operand (cc_out).
3188 !MCID.OpInfo[OpNo].isOptionalDef() && OpNo < MCID.NumOperands;
3191 // If we're parsing Thumb1, reject it completely.
3192 if (isThumbOne() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3193 return Match_MnemonicFail;
3194 // If we're parsing Thumb2, which form is legal depends on whether we're
3196 // FIXME: We don't yet do IT blocks, so just always consider it to be
3197 // that we aren't in one until we do.
3198 if (isThumbTwo() && Inst.getOperand(OpNo).getReg() != ARM::CPSR)
3199 return Match_RequiresITBlock;
3201 // Some high-register supporting Thumb1 encodings only allow both registers
3202 // to be from r0-r7 when in Thumb2.
3203 else if (Opc == ARM::tADDhirr && isThumbOne() &&
3204 isARMLowRegister(Inst.getOperand(1).getReg()) &&
3205 isARMLowRegister(Inst.getOperand(2).getReg()))
3206 return Match_RequiresThumb2;
3207 // Others only require ARMv6 or later.
3208 else if (Opc == ARM::tMOVr && isThumbOne() && !hasV6Ops() &&
3209 isARMLowRegister(Inst.getOperand(0).getReg()) &&
3210 isARMLowRegister(Inst.getOperand(1).getReg()))
3211 return Match_RequiresV6;
3212 return Match_Success;
3216 MatchAndEmitInstruction(SMLoc IDLoc,
3217 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
3221 unsigned MatchResult;
3222 MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo);
3223 switch (MatchResult) {
3226 // Context sensitive operand constraints aren't handled by the matcher,
3227 // so check them here.
3228 if (validateInstruction(Inst, Operands))
3231 // Some instructions need post-processing to, for example, tweak which
3232 // encoding is selected.
3233 processInstruction(Inst, Operands);
3235 Out.EmitInstruction(Inst);
3237 case Match_MissingFeature:
3238 Error(IDLoc, "instruction requires a CPU feature not currently enabled");
3240 case Match_InvalidOperand: {
3241 SMLoc ErrorLoc = IDLoc;
3242 if (ErrorInfo != ~0U) {
3243 if (ErrorInfo >= Operands.size())
3244 return Error(IDLoc, "too few operands for instruction");
3246 ErrorLoc = ((ARMOperand*)Operands[ErrorInfo])->getStartLoc();
3247 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
3250 return Error(ErrorLoc, "invalid operand for instruction");
3252 case Match_MnemonicFail:
3253 return Error(IDLoc, "invalid instruction");
3254 case Match_ConversionFail:
3255 // The converter function will have already emited a diagnostic.
3257 case Match_RequiresITBlock:
3258 return Error(IDLoc, "instruction only valid inside IT block");
3259 case Match_RequiresV6:
3260 return Error(IDLoc, "instruction variant requires ARMv6 or later");
3261 case Match_RequiresThumb2:
3262 return Error(IDLoc, "instruction variant requires Thumb2");
3265 llvm_unreachable("Implement any new match types added!");
3269 /// parseDirective parses the arm specific directives
3270 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
3271 StringRef IDVal = DirectiveID.getIdentifier();
3272 if (IDVal == ".word")
3273 return parseDirectiveWord(4, DirectiveID.getLoc());
3274 else if (IDVal == ".thumb")
3275 return parseDirectiveThumb(DirectiveID.getLoc());
3276 else if (IDVal == ".thumb_func")
3277 return parseDirectiveThumbFunc(DirectiveID.getLoc());
3278 else if (IDVal == ".code")
3279 return parseDirectiveCode(DirectiveID.getLoc());
3280 else if (IDVal == ".syntax")
3281 return parseDirectiveSyntax(DirectiveID.getLoc());
3285 /// parseDirectiveWord
3286 /// ::= .word [ expression (, expression)* ]
3287 bool ARMAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
3288 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3290 const MCExpr *Value;
3291 if (getParser().ParseExpression(Value))
3294 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
3296 if (getLexer().is(AsmToken::EndOfStatement))
3299 // FIXME: Improve diagnostic.
3300 if (getLexer().isNot(AsmToken::Comma))
3301 return Error(L, "unexpected token in directive");
3310 /// parseDirectiveThumb
3312 bool ARMAsmParser::parseDirectiveThumb(SMLoc L) {
3313 if (getLexer().isNot(AsmToken::EndOfStatement))
3314 return Error(L, "unexpected token in directive");
3317 // TODO: set thumb mode
3318 // TODO: tell the MC streamer the mode
3319 // getParser().getStreamer().Emit???();
3323 /// parseDirectiveThumbFunc
3324 /// ::= .thumbfunc symbol_name
3325 bool ARMAsmParser::parseDirectiveThumbFunc(SMLoc L) {
3326 const MCAsmInfo &MAI = getParser().getStreamer().getContext().getAsmInfo();
3327 bool isMachO = MAI.hasSubsectionsViaSymbols();
3330 // Darwin asm has function name after .thumb_func direction
3333 const AsmToken &Tok = Parser.getTok();
3334 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
3335 return Error(L, "unexpected token in .thumb_func directive");
3336 Name = Tok.getString();
3337 Parser.Lex(); // Consume the identifier token.
3340 if (getLexer().isNot(AsmToken::EndOfStatement))
3341 return Error(L, "unexpected token in directive");
3344 // FIXME: assuming function name will be the line following .thumb_func
3346 Name = Parser.getTok().getString();
3349 // Mark symbol as a thumb symbol.
3350 MCSymbol *Func = getParser().getContext().GetOrCreateSymbol(Name);
3351 getParser().getStreamer().EmitThumbFunc(Func);
3355 /// parseDirectiveSyntax
3356 /// ::= .syntax unified | divided
3357 bool ARMAsmParser::parseDirectiveSyntax(SMLoc L) {
3358 const AsmToken &Tok = Parser.getTok();
3359 if (Tok.isNot(AsmToken::Identifier))
3360 return Error(L, "unexpected token in .syntax directive");
3361 StringRef Mode = Tok.getString();
3362 if (Mode == "unified" || Mode == "UNIFIED")
3364 else if (Mode == "divided" || Mode == "DIVIDED")
3365 return Error(L, "'.syntax divided' arm asssembly not supported");
3367 return Error(L, "unrecognized syntax mode in .syntax directive");
3369 if (getLexer().isNot(AsmToken::EndOfStatement))
3370 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3373 // TODO tell the MC streamer the mode
3374 // getParser().getStreamer().Emit???();
3378 /// parseDirectiveCode
3379 /// ::= .code 16 | 32
3380 bool ARMAsmParser::parseDirectiveCode(SMLoc L) {
3381 const AsmToken &Tok = Parser.getTok();
3382 if (Tok.isNot(AsmToken::Integer))
3383 return Error(L, "unexpected token in .code directive");
3384 int64_t Val = Parser.getTok().getIntVal();
3390 return Error(L, "invalid operand to .code directive");
3392 if (getLexer().isNot(AsmToken::EndOfStatement))
3393 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
3399 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code16);
3404 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
3411 extern "C" void LLVMInitializeARMAsmLexer();
3413 /// Force static initialization.
3414 extern "C" void LLVMInitializeARMAsmParser() {
3415 RegisterMCAsmParser<ARMAsmParser> X(TheARMTarget);
3416 RegisterMCAsmParser<ARMAsmParser> Y(TheThumbTarget);
3417 LLVMInitializeARMAsmLexer();
3420 #define GET_REGISTER_MATCHER
3421 #define GET_MATCHER_IMPLEMENTATION
3422 #include "ARMGenAsmMatcher.inc"