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 //===----------------------------------------------------------------------===//
11 #include "ARMSubtarget.h"
12 #include "llvm/MC/MCParser/MCAsmLexer.h"
13 #include "llvm/MC/MCParser/MCAsmParser.h"
14 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
15 #include "llvm/MC/MCStreamer.h"
16 #include "llvm/MC/MCExpr.h"
17 #include "llvm/MC/MCInst.h"
18 #include "llvm/Target/TargetRegistry.h"
19 #include "llvm/Target/TargetAsmParser.h"
20 #include "llvm/Support/Compiler.h"
21 #include "llvm/Support/SourceMgr.h"
22 #include "llvm/Support/raw_ostream.h"
23 #include "llvm/ADT/OwningPtr.h"
24 #include "llvm/ADT/SmallVector.h"
25 #include "llvm/ADT/StringSwitch.h"
26 #include "llvm/ADT/Twine.h"
32 // The shift types for register controlled shifts in arm memory addressing
41 class ARMAsmParser : public TargetAsmParser {
46 MCAsmParser &getParser() const { return Parser; }
48 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
50 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
52 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
54 bool MaybeParseRegister(OwningPtr<ARMOperand> &Op, bool ParseWriteBack);
56 bool ParseRegisterList(OwningPtr<ARMOperand> &Op);
58 bool ParseMemory(OwningPtr<ARMOperand> &Op);
60 bool ParseMemoryOffsetReg(bool &Negative,
61 bool &OffsetRegShifted,
62 enum ShiftType &ShiftType,
63 const MCExpr *&ShiftAmount,
64 const MCExpr *&Offset,
69 bool ParseShift(enum ShiftType &St, const MCExpr *&ShiftAmount, SMLoc &E);
71 bool ParseOperand(OwningPtr<ARMOperand> &Op);
73 bool ParseDirectiveWord(unsigned Size, SMLoc L);
75 bool ParseDirectiveThumb(SMLoc L);
77 bool ParseDirectiveThumbFunc(SMLoc L);
79 bool ParseDirectiveCode(SMLoc L);
81 bool ParseDirectiveSyntax(SMLoc L);
83 /// @name Auto-generated Match Functions
86 unsigned ComputeAvailableFeatures(const ARMSubtarget *Subtarget) const;
88 bool MatchInstruction(const SmallVectorImpl<MCParsedAsmOperand*> &Operands,
95 ARMAsmParser(const Target &T, MCAsmParser &_Parser, TargetMachine &_TM)
96 : TargetAsmParser(T), Parser(_Parser), TM(_TM) {}
98 virtual bool ParseInstruction(StringRef Name, SMLoc NameLoc,
99 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
101 virtual bool ParseDirective(AsmToken DirectiveID);
104 /// ARMOperand - Instances of this class represent a parsed ARM machine
106 struct ARMOperand : public MCParsedAsmOperand {
118 SMLoc StartLoc, EndLoc;
122 ARMCC::CondCodes Val;
139 // This is for all forms of ARM address expressions
142 unsigned OffsetRegNum; // used when OffsetIsReg is true
143 const MCExpr *Offset; // used when OffsetIsReg is false
144 const MCExpr *ShiftAmount; // used when OffsetRegShifted is true
145 enum ShiftType ShiftType; // used when OffsetRegShifted is true
147 OffsetRegShifted : 1, // only used when OffsetIsReg is true
151 Negative : 1, // only used when OffsetIsReg is true
157 ARMOperand(KindTy K, SMLoc S, SMLoc E)
158 : Kind(K), StartLoc(S), EndLoc(E) {}
160 ARMOperand(const ARMOperand &o) : MCParsedAsmOperand() {
162 StartLoc = o.StartLoc;
183 /// getStartLoc - Get the location of the first token of this operand.
184 SMLoc getStartLoc() const { return StartLoc; }
185 /// getEndLoc - Get the location of the last token of this operand.
186 SMLoc getEndLoc() const { return EndLoc; }
188 ARMCC::CondCodes getCondCode() const {
189 assert(Kind == CondCode && "Invalid access!");
193 StringRef getToken() const {
194 assert(Kind == Token && "Invalid access!");
195 return StringRef(Tok.Data, Tok.Length);
198 unsigned getReg() const {
199 assert(Kind == Register && "Invalid access!");
203 const MCExpr *getImm() const {
204 assert(Kind == Immediate && "Invalid access!");
208 bool isCondCode() const { return Kind == CondCode; }
210 bool isImm() const { return Kind == Immediate; }
212 bool isReg() const { return Kind == Register; }
214 bool isToken() const {return Kind == Token; }
216 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
217 // Add as immediates when possible.
218 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
219 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
221 Inst.addOperand(MCOperand::CreateExpr(Expr));
224 void addCondCodeOperands(MCInst &Inst, unsigned N) const {
225 assert(N == 2 && "Invalid number of operands!");
226 Inst.addOperand(MCOperand::CreateImm(unsigned(getCondCode())));
227 // FIXME: What belongs here?
228 Inst.addOperand(MCOperand::CreateReg(0));
231 void addRegOperands(MCInst &Inst, unsigned N) const {
232 assert(N == 1 && "Invalid number of operands!");
233 Inst.addOperand(MCOperand::CreateReg(getReg()));
236 void addImmOperands(MCInst &Inst, unsigned N) const {
237 assert(N == 1 && "Invalid number of operands!");
238 addExpr(Inst, getImm());
241 virtual void dump(raw_ostream &OS) const;
243 static void CreateCondCode(OwningPtr<ARMOperand> &Op, ARMCC::CondCodes CC,
245 Op.reset(new ARMOperand);
252 static void CreateToken(OwningPtr<ARMOperand> &Op, StringRef Str,
254 Op.reset(new ARMOperand);
256 Op->Tok.Data = Str.data();
257 Op->Tok.Length = Str.size();
262 static void CreateReg(OwningPtr<ARMOperand> &Op, unsigned RegNum,
263 bool Writeback, SMLoc S, SMLoc E) {
264 Op.reset(new ARMOperand);
266 Op->Reg.RegNum = RegNum;
267 Op->Reg.Writeback = Writeback;
273 static void CreateImm(OwningPtr<ARMOperand> &Op, const MCExpr *Val,
275 Op.reset(new ARMOperand);
276 Op->Kind = Immediate;
283 static void CreateMem(OwningPtr<ARMOperand> &Op,
284 unsigned BaseRegNum, bool OffsetIsReg,
285 const MCExpr *Offset, unsigned OffsetRegNum,
286 bool OffsetRegShifted, enum ShiftType ShiftType,
287 const MCExpr *ShiftAmount, bool Preindexed,
288 bool Postindexed, bool Negative, bool Writeback,
290 Op.reset(new ARMOperand);
292 Op->Mem.BaseRegNum = BaseRegNum;
293 Op->Mem.OffsetIsReg = OffsetIsReg;
294 Op->Mem.Offset = Offset;
295 Op->Mem.OffsetRegNum = OffsetRegNum;
296 Op->Mem.OffsetRegShifted = OffsetRegShifted;
297 Op->Mem.ShiftType = ShiftType;
298 Op->Mem.ShiftAmount = ShiftAmount;
299 Op->Mem.Preindexed = Preindexed;
300 Op->Mem.Postindexed = Postindexed;
301 Op->Mem.Negative = Negative;
302 Op->Mem.Writeback = Writeback;
309 } // end anonymous namespace.
311 void ARMOperand::dump(raw_ostream &OS) const {
314 OS << ARMCondCodeToString(getCondCode());
323 OS << "<register " << getReg() << ">";
326 OS << "'" << getToken() << "'";
331 /// @name Auto-generated Match Functions
334 static unsigned MatchRegisterName(StringRef Name);
338 /// Try to parse a register name. The token must be an Identifier when called,
339 /// and if it is a register name a Reg operand is created, the token is eaten
340 /// and false is returned. Else true is returned and no token is eaten.
341 /// TODO this is likely to change to allow different register types and or to
342 /// parse for a specific register type.
343 bool ARMAsmParser::MaybeParseRegister
344 (OwningPtr<ARMOperand> &Op, bool ParseWriteBack) {
346 const AsmToken &Tok = Parser.getTok();
347 assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier");
349 // FIXME: Validate register for the current architecture; we have to do
350 // validation later, so maybe there is no need for this here.
353 RegNum = MatchRegisterName(Tok.getString());
359 Parser.Lex(); // Eat identifier token.
361 E = Parser.getTok().getLoc();
363 bool Writeback = false;
364 if (ParseWriteBack) {
365 const AsmToken &ExclaimTok = Parser.getTok();
366 if (ExclaimTok.is(AsmToken::Exclaim)) {
367 E = ExclaimTok.getLoc();
369 Parser.Lex(); // Eat exclaim token
373 ARMOperand::CreateReg(Op, RegNum, Writeback, S, E);
378 /// Parse a register list, return false if successful else return true or an
379 /// error. The first token must be a '{' when called.
380 bool ARMAsmParser::ParseRegisterList(OwningPtr<ARMOperand> &Op) {
382 assert(Parser.getTok().is(AsmToken::LCurly) &&
383 "Token is not an Left Curly Brace");
384 S = Parser.getTok().getLoc();
385 Parser.Lex(); // Eat left curly brace token.
387 const AsmToken &RegTok = Parser.getTok();
388 SMLoc RegLoc = RegTok.getLoc();
389 if (RegTok.isNot(AsmToken::Identifier))
390 return Error(RegLoc, "register expected");
391 int RegNum = MatchRegisterName(RegTok.getString());
393 return Error(RegLoc, "register expected");
394 Parser.Lex(); // Eat identifier token.
395 unsigned RegList = 1 << RegNum;
397 int HighRegNum = RegNum;
398 // TODO ranges like "{Rn-Rm}"
399 while (Parser.getTok().is(AsmToken::Comma)) {
400 Parser.Lex(); // Eat comma token.
402 const AsmToken &RegTok = Parser.getTok();
403 SMLoc RegLoc = RegTok.getLoc();
404 if (RegTok.isNot(AsmToken::Identifier))
405 return Error(RegLoc, "register expected");
406 int RegNum = MatchRegisterName(RegTok.getString());
408 return Error(RegLoc, "register expected");
410 if (RegList & (1 << RegNum))
411 Warning(RegLoc, "register duplicated in register list");
412 else if (RegNum <= HighRegNum)
413 Warning(RegLoc, "register not in ascending order in register list");
414 RegList |= 1 << RegNum;
417 Parser.Lex(); // Eat identifier token.
419 const AsmToken &RCurlyTok = Parser.getTok();
420 if (RCurlyTok.isNot(AsmToken::RCurly))
421 return Error(RCurlyTok.getLoc(), "'}' expected");
422 E = RCurlyTok.getLoc();
423 Parser.Lex(); // Eat left curly brace token.
428 /// Parse an arm memory expression, return false if successful else return true
429 /// or an error. The first token must be a '[' when called.
430 /// TODO Only preindexing and postindexing addressing are started, unindexed
431 /// with option, etc are still to do.
432 bool ARMAsmParser::ParseMemory(OwningPtr<ARMOperand> &Op) {
434 assert(Parser.getTok().is(AsmToken::LBrac) &&
435 "Token is not an Left Bracket");
436 S = Parser.getTok().getLoc();
437 Parser.Lex(); // Eat left bracket token.
439 const AsmToken &BaseRegTok = Parser.getTok();
440 if (BaseRegTok.isNot(AsmToken::Identifier))
441 return Error(BaseRegTok.getLoc(), "register expected");
442 if (MaybeParseRegister(Op, false))
443 return Error(BaseRegTok.getLoc(), "register expected");
444 int BaseRegNum = Op->getReg();
446 bool Preindexed = false;
447 bool Postindexed = false;
448 bool OffsetIsReg = false;
449 bool Negative = false;
450 bool Writeback = false;
452 // First look for preindexed address forms, that is after the "[Rn" we now
453 // have to see if the next token is a comma.
454 const AsmToken &Tok = Parser.getTok();
455 if (Tok.is(AsmToken::Comma)) {
457 Parser.Lex(); // Eat comma token.
459 bool OffsetRegShifted;
460 enum ShiftType ShiftType;
461 const MCExpr *ShiftAmount;
462 const MCExpr *Offset;
463 if(ParseMemoryOffsetReg(Negative, OffsetRegShifted, ShiftType, ShiftAmount,
464 Offset, OffsetIsReg, OffsetRegNum, E))
466 const AsmToken &RBracTok = Parser.getTok();
467 if (RBracTok.isNot(AsmToken::RBrac))
468 return Error(RBracTok.getLoc(), "']' expected");
469 E = RBracTok.getLoc();
470 Parser.Lex(); // Eat right bracket token.
472 const AsmToken &ExclaimTok = Parser.getTok();
473 if (ExclaimTok.is(AsmToken::Exclaim)) {
474 E = ExclaimTok.getLoc();
476 Parser.Lex(); // Eat exclaim token
478 ARMOperand::CreateMem(Op, BaseRegNum, OffsetIsReg, Offset, OffsetRegNum,
479 OffsetRegShifted, ShiftType, ShiftAmount,
480 Preindexed, Postindexed, Negative, Writeback, S, E);
483 // The "[Rn" we have so far was not followed by a comma.
484 else if (Tok.is(AsmToken::RBrac)) {
485 // This is a post indexing addressing forms, that is a ']' follows after
490 Parser.Lex(); // Eat right bracket token.
492 int OffsetRegNum = 0;
493 bool OffsetRegShifted = false;
494 enum ShiftType ShiftType;
495 const MCExpr *ShiftAmount;
496 const MCExpr *Offset;
498 const AsmToken &NextTok = Parser.getTok();
499 if (NextTok.isNot(AsmToken::EndOfStatement)) {
500 if (NextTok.isNot(AsmToken::Comma))
501 return Error(NextTok.getLoc(), "',' expected");
502 Parser.Lex(); // Eat comma token.
503 if(ParseMemoryOffsetReg(Negative, OffsetRegShifted, ShiftType,
504 ShiftAmount, Offset, OffsetIsReg, OffsetRegNum,
509 ARMOperand::CreateMem(Op, BaseRegNum, OffsetIsReg, Offset, OffsetRegNum,
510 OffsetRegShifted, ShiftType, ShiftAmount,
511 Preindexed, Postindexed, Negative, Writeback, S, E);
518 /// Parse the offset of a memory operand after we have seen "[Rn," or "[Rn],"
519 /// we will parse the following (were +/- means that a plus or minus is
524 /// we return false on success or an error otherwise.
525 bool ARMAsmParser::ParseMemoryOffsetReg(bool &Negative,
526 bool &OffsetRegShifted,
527 enum ShiftType &ShiftType,
528 const MCExpr *&ShiftAmount,
529 const MCExpr *&Offset,
533 OwningPtr<ARMOperand> Op;
535 OffsetRegShifted = false;
538 const AsmToken &NextTok = Parser.getTok();
539 E = NextTok.getLoc();
540 if (NextTok.is(AsmToken::Plus))
541 Parser.Lex(); // Eat plus token.
542 else if (NextTok.is(AsmToken::Minus)) {
544 Parser.Lex(); // Eat minus token
546 // See if there is a register following the "[Rn," or "[Rn]," we have so far.
547 const AsmToken &OffsetRegTok = Parser.getTok();
548 if (OffsetRegTok.is(AsmToken::Identifier)) {
549 OffsetIsReg = !MaybeParseRegister(Op, false);
552 OffsetRegNum = Op->getReg();
555 // If we parsed a register as the offset then their can be a shift after that
556 if (OffsetRegNum != -1) {
557 // Look for a comma then a shift
558 const AsmToken &Tok = Parser.getTok();
559 if (Tok.is(AsmToken::Comma)) {
560 Parser.Lex(); // Eat comma token.
562 const AsmToken &Tok = Parser.getTok();
563 if (ParseShift(ShiftType, ShiftAmount, E))
564 return Error(Tok.getLoc(), "shift expected");
565 OffsetRegShifted = true;
568 else { // the "[Rn," or "[Rn,]" we have so far was not followed by "Rm"
569 // Look for #offset following the "[Rn," or "[Rn],"
570 const AsmToken &HashTok = Parser.getTok();
571 if (HashTok.isNot(AsmToken::Hash))
572 return Error(HashTok.getLoc(), "'#' expected");
574 Parser.Lex(); // Eat hash token.
576 if (getParser().ParseExpression(Offset))
578 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
583 /// ParseShift as one of these two:
584 /// ( lsl | lsr | asr | ror ) , # shift_amount
586 /// and returns true if it parses a shift otherwise it returns false.
587 bool ARMAsmParser::ParseShift(ShiftType &St,
588 const MCExpr *&ShiftAmount,
590 const AsmToken &Tok = Parser.getTok();
591 if (Tok.isNot(AsmToken::Identifier))
593 StringRef ShiftName = Tok.getString();
594 if (ShiftName == "lsl" || ShiftName == "LSL")
596 else if (ShiftName == "lsr" || ShiftName == "LSR")
598 else if (ShiftName == "asr" || ShiftName == "ASR")
600 else if (ShiftName == "ror" || ShiftName == "ROR")
602 else if (ShiftName == "rrx" || ShiftName == "RRX")
606 Parser.Lex(); // Eat shift type token.
612 // Otherwise, there must be a '#' and a shift amount.
613 const AsmToken &HashTok = Parser.getTok();
614 if (HashTok.isNot(AsmToken::Hash))
615 return Error(HashTok.getLoc(), "'#' expected");
616 Parser.Lex(); // Eat hash token.
618 if (getParser().ParseExpression(ShiftAmount))
624 /// Parse a arm instruction operand. For now this parses the operand regardless
626 bool ARMAsmParser::ParseOperand(OwningPtr<ARMOperand> &Op) {
629 switch (getLexer().getKind()) {
630 case AsmToken::Identifier:
631 if (!MaybeParseRegister(Op, true))
633 // This was not a register so parse other operands that start with an
634 // identifier (like labels) as expressions and create them as immediates.
636 S = Parser.getTok().getLoc();
637 if (getParser().ParseExpression(IdVal))
639 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
640 ARMOperand::CreateImm(Op, IdVal, S, E);
642 case AsmToken::LBrac:
643 return ParseMemory(Op);
644 case AsmToken::LCurly:
645 return ParseRegisterList(Op);
648 // TODO: ":lower16:" and ":upper16:" modifiers after # before immediate
649 S = Parser.getTok().getLoc();
651 const MCExpr *ImmVal;
652 if (getParser().ParseExpression(ImmVal))
654 E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
655 ARMOperand::CreateImm(Op, ImmVal, S, E);
658 return Error(Parser.getTok().getLoc(), "unexpected token in operand");
662 /// Parse an arm instruction mnemonic followed by its operands.
663 bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
664 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
665 OwningPtr<ARMOperand> Op;
667 // Create the leading tokens for the mnemonic, split by '.' characters.
668 size_t Start = 0, Next = Name.find('.');
669 StringRef Head = Name.slice(Start, Next);
671 // Determine the predicate, if any.
673 // FIXME: We need a way to check whether a prefix supports predication,
674 // otherwise we will end up with an ambiguity for instructions that happen to
675 // end with a predicate name.
676 unsigned CC = StringSwitch<unsigned>(Head.substr(Head.size()-2))
677 .Case("eq", ARMCC::EQ)
678 .Case("ne", ARMCC::NE)
679 .Case("hs", ARMCC::HS)
680 .Case("lo", ARMCC::LO)
681 .Case("mi", ARMCC::MI)
682 .Case("pl", ARMCC::PL)
683 .Case("vs", ARMCC::VS)
684 .Case("vc", ARMCC::VC)
685 .Case("hi", ARMCC::HI)
686 .Case("ls", ARMCC::LS)
687 .Case("ge", ARMCC::GE)
688 .Case("lt", ARMCC::LT)
689 .Case("gt", ARMCC::GT)
690 .Case("le", ARMCC::LE)
691 .Case("al", ARMCC::AL)
694 Head = Head.slice(0, Head.size() - 2);
698 ARMOperand::CreateToken(Op, Head, NameLoc);
699 Operands.push_back(Op.take());
701 ARMOperand::CreateCondCode(Op, ARMCC::CondCodes(CC), NameLoc);
702 Operands.push_back(Op.take());
704 // Add the remaining tokens in the mnemonic.
705 while (Next != StringRef::npos) {
707 Next = Name.find('.', Start + 1);
708 Head = Name.slice(Start, Next);
710 ARMOperand::CreateToken(Op, Head, NameLoc);
711 Operands.push_back(Op.take());
714 // Read the remaining operands.
715 if (getLexer().isNot(AsmToken::EndOfStatement)) {
716 // Read the first operand.
717 OwningPtr<ARMOperand> Op;
718 if (ParseOperand(Op)) return true;
719 Operands.push_back(Op.take());
721 while (getLexer().is(AsmToken::Comma)) {
722 Parser.Lex(); // Eat the comma.
724 // Parse and remember the operand.
725 if (ParseOperand(Op)) return true;
726 Operands.push_back(Op.take());
732 /// ParseDirective parses the arm specific directives
733 bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
734 StringRef IDVal = DirectiveID.getIdentifier();
735 if (IDVal == ".word")
736 return ParseDirectiveWord(4, DirectiveID.getLoc());
737 else if (IDVal == ".thumb")
738 return ParseDirectiveThumb(DirectiveID.getLoc());
739 else if (IDVal == ".thumb_func")
740 return ParseDirectiveThumbFunc(DirectiveID.getLoc());
741 else if (IDVal == ".code")
742 return ParseDirectiveCode(DirectiveID.getLoc());
743 else if (IDVal == ".syntax")
744 return ParseDirectiveSyntax(DirectiveID.getLoc());
748 /// ParseDirectiveWord
749 /// ::= .word [ expression (, expression)* ]
750 bool ARMAsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
751 if (getLexer().isNot(AsmToken::EndOfStatement)) {
754 if (getParser().ParseExpression(Value))
757 getParser().getStreamer().EmitValue(Value, Size, 0/*addrspace*/);
759 if (getLexer().is(AsmToken::EndOfStatement))
762 // FIXME: Improve diagnostic.
763 if (getLexer().isNot(AsmToken::Comma))
764 return Error(L, "unexpected token in directive");
773 /// ParseDirectiveThumb
775 bool ARMAsmParser::ParseDirectiveThumb(SMLoc L) {
776 if (getLexer().isNot(AsmToken::EndOfStatement))
777 return Error(L, "unexpected token in directive");
780 // TODO: set thumb mode
781 // TODO: tell the MC streamer the mode
782 // getParser().getStreamer().Emit???();
786 /// ParseDirectiveThumbFunc
787 /// ::= .thumbfunc symbol_name
788 bool ARMAsmParser::ParseDirectiveThumbFunc(SMLoc L) {
789 const AsmToken &Tok = Parser.getTok();
790 if (Tok.isNot(AsmToken::Identifier) && Tok.isNot(AsmToken::String))
791 return Error(L, "unexpected token in .syntax directive");
792 StringRef ATTRIBUTE_UNUSED SymbolName = Parser.getTok().getIdentifier();
793 Parser.Lex(); // Consume the identifier token.
795 if (getLexer().isNot(AsmToken::EndOfStatement))
796 return Error(L, "unexpected token in directive");
799 // TODO: mark symbol as a thumb symbol
800 // getParser().getStreamer().Emit???();
804 /// ParseDirectiveSyntax
805 /// ::= .syntax unified | divided
806 bool ARMAsmParser::ParseDirectiveSyntax(SMLoc L) {
807 const AsmToken &Tok = Parser.getTok();
808 if (Tok.isNot(AsmToken::Identifier))
809 return Error(L, "unexpected token in .syntax directive");
810 StringRef Mode = Tok.getString();
811 if (Mode == "unified" || Mode == "UNIFIED")
813 else if (Mode == "divided" || Mode == "DIVIDED")
816 return Error(L, "unrecognized syntax mode in .syntax directive");
818 if (getLexer().isNot(AsmToken::EndOfStatement))
819 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
822 // TODO tell the MC streamer the mode
823 // getParser().getStreamer().Emit???();
827 /// ParseDirectiveCode
828 /// ::= .code 16 | 32
829 bool ARMAsmParser::ParseDirectiveCode(SMLoc L) {
830 const AsmToken &Tok = Parser.getTok();
831 if (Tok.isNot(AsmToken::Integer))
832 return Error(L, "unexpected token in .code directive");
833 int64_t Val = Parser.getTok().getIntVal();
839 return Error(L, "invalid operand to .code directive");
841 if (getLexer().isNot(AsmToken::EndOfStatement))
842 return Error(Parser.getTok().getLoc(), "unexpected token in directive");
845 // TODO tell the MC streamer the mode
846 // getParser().getStreamer().Emit???();
850 extern "C" void LLVMInitializeARMAsmLexer();
852 /// Force static initialization.
853 extern "C" void LLVMInitializeARMAsmParser() {
854 RegisterAsmParser<ARMAsmParser> X(TheARMTarget);
855 RegisterAsmParser<ARMAsmParser> Y(TheThumbTarget);
856 LLVMInitializeARMAsmLexer();
859 #include "ARMGenAsmMatcher.inc"