1 //===-- X86AsmParser.cpp - Parse X86 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/X86BaseInfo.h"
11 #include "llvm/ADT/APFloat.h"
12 #include "llvm/ADT/SmallString.h"
13 #include "llvm/ADT/SmallVector.h"
14 #include "llvm/ADT/StringSwitch.h"
15 #include "llvm/ADT/Twine.h"
16 #include "llvm/MC/MCExpr.h"
17 #include "llvm/MC/MCInst.h"
18 #include "llvm/MC/MCParser/MCAsmLexer.h"
19 #include "llvm/MC/MCParser/MCAsmParser.h"
20 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/MC/MCStreamer.h"
23 #include "llvm/MC/MCSubtargetInfo.h"
24 #include "llvm/MC/MCSymbol.h"
25 #include "llvm/MC/MCTargetAsmParser.h"
26 #include "llvm/Support/SourceMgr.h"
27 #include "llvm/Support/TargetRegistry.h"
28 #include "llvm/Support/raw_ostream.h"
35 class X86AsmParser : public MCTargetAsmParser {
38 ParseInstructionInfo *InstInfo;
40 MCAsmParser &getParser() const { return Parser; }
42 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
44 bool Error(SMLoc L, const Twine &Msg,
45 ArrayRef<SMRange> Ranges = ArrayRef<SMRange>(),
46 bool MatchingInlineAsm = false) {
47 if (MatchingInlineAsm) return true;
48 return Parser.Error(L, Msg, Ranges);
51 X86Operand *ErrorOperand(SMLoc Loc, StringRef Msg) {
56 X86Operand *ParseOperand();
57 X86Operand *ParseATTOperand();
58 X86Operand *ParseIntelOperand();
59 X86Operand *ParseIntelOffsetOfOperator(SMLoc StartLoc);
60 X86Operand *ParseIntelTypeOperator(SMLoc StartLoc);
61 X86Operand *ParseIntelMemOperand(unsigned SegReg, SMLoc StartLoc);
62 X86Operand *ParseIntelBracExpression(unsigned SegReg, unsigned Size);
63 X86Operand *ParseMemOperand(unsigned SegReg, SMLoc StartLoc);
65 bool ParseIntelDotOperator(const MCExpr *Disp, const MCExpr **NewDisp,
66 SmallString<64> &Err);
68 bool ParseDirectiveWord(unsigned Size, SMLoc L);
69 bool ParseDirectiveCode(StringRef IDVal, SMLoc L);
71 bool processInstruction(MCInst &Inst,
72 const SmallVectorImpl<MCParsedAsmOperand*> &Ops);
74 bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
75 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
76 MCStreamer &Out, unsigned &ErrorInfo,
77 bool MatchingInlineAsm);
79 /// isSrcOp - Returns true if operand is either (%rsi) or %ds:%(rsi)
80 /// in 64bit mode or (%esi) or %es:(%esi) in 32bit mode.
81 bool isSrcOp(X86Operand &Op);
83 /// isDstOp - Returns true if operand is either (%rdi) or %es:(%rdi)
84 /// in 64bit mode or (%edi) or %es:(%edi) in 32bit mode.
85 bool isDstOp(X86Operand &Op);
87 bool is64BitMode() const {
88 // FIXME: Can tablegen auto-generate this?
89 return (STI.getFeatureBits() & X86::Mode64Bit) != 0;
92 unsigned FB = ComputeAvailableFeatures(STI.ToggleFeature(X86::Mode64Bit));
93 setAvailableFeatures(FB);
96 /// @name Auto-generated Matcher Functions
99 #define GET_ASSEMBLER_HEADER
100 #include "X86GenAsmMatcher.inc"
105 X86AsmParser(MCSubtargetInfo &sti, MCAsmParser &parser)
106 : MCTargetAsmParser(), STI(sti), Parser(parser), InstInfo(0) {
108 // Initialize the set of available features.
109 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
111 virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
113 virtual bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
115 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
117 virtual bool ParseDirective(AsmToken DirectiveID);
119 bool isParsingIntelSyntax() {
120 return getParser().getAssemblerDialect();
123 } // end anonymous namespace
125 /// @name Auto-generated Match Functions
128 static unsigned MatchRegisterName(StringRef Name);
132 static bool isImmSExti16i8Value(uint64_t Value) {
133 return (( Value <= 0x000000000000007FULL)||
134 (0x000000000000FF80ULL <= Value && Value <= 0x000000000000FFFFULL)||
135 (0xFFFFFFFFFFFFFF80ULL <= Value && Value <= 0xFFFFFFFFFFFFFFFFULL));
138 static bool isImmSExti32i8Value(uint64_t Value) {
139 return (( Value <= 0x000000000000007FULL)||
140 (0x00000000FFFFFF80ULL <= Value && Value <= 0x00000000FFFFFFFFULL)||
141 (0xFFFFFFFFFFFFFF80ULL <= Value && Value <= 0xFFFFFFFFFFFFFFFFULL));
144 static bool isImmZExtu32u8Value(uint64_t Value) {
145 return (Value <= 0x00000000000000FFULL);
148 static bool isImmSExti64i8Value(uint64_t Value) {
149 return (( Value <= 0x000000000000007FULL)||
150 (0xFFFFFFFFFFFFFF80ULL <= Value && Value <= 0xFFFFFFFFFFFFFFFFULL));
153 static bool isImmSExti64i32Value(uint64_t Value) {
154 return (( Value <= 0x000000007FFFFFFFULL)||
155 (0xFFFFFFFF80000000ULL <= Value && Value <= 0xFFFFFFFFFFFFFFFFULL));
159 /// X86Operand - Instances of this class represent a parsed X86 machine
161 struct X86Operand : public MCParsedAsmOperand {
169 SMLoc StartLoc, EndLoc;
198 X86Operand(KindTy K, SMLoc Start, SMLoc End)
199 : Kind(K), StartLoc(Start), EndLoc(End) {}
201 /// getStartLoc - Get the location of the first token of this operand.
202 SMLoc getStartLoc() const { return StartLoc; }
203 /// getEndLoc - Get the location of the last token of this operand.
204 SMLoc getEndLoc() const { return EndLoc; }
205 /// getLocRange - Get the range between the first and last token of this
207 SMRange getLocRange() const { return SMRange(StartLoc, EndLoc); }
208 /// getOffsetOfLoc - Get the location of the offset operator.
209 SMLoc getOffsetOfLoc() const { return OffsetOfLoc; }
211 virtual void print(raw_ostream &OS) const {}
213 StringRef getToken() const {
214 assert(Kind == Token && "Invalid access!");
215 return StringRef(Tok.Data, Tok.Length);
217 void setTokenValue(StringRef Value) {
218 assert(Kind == Token && "Invalid access!");
219 Tok.Data = Value.data();
220 Tok.Length = Value.size();
223 unsigned getReg() const {
224 assert(Kind == Register && "Invalid access!");
228 const MCExpr *getImm() const {
229 assert(Kind == Immediate && "Invalid access!");
233 bool needAsmRewrite() const {
234 assert(Kind == Immediate && "Invalid access!");
235 return Imm.NeedAsmRewrite;
238 const MCExpr *getMemDisp() const {
239 assert(Kind == Memory && "Invalid access!");
242 unsigned getMemSegReg() const {
243 assert(Kind == Memory && "Invalid access!");
246 unsigned getMemBaseReg() const {
247 assert(Kind == Memory && "Invalid access!");
250 unsigned getMemIndexReg() const {
251 assert(Kind == Memory && "Invalid access!");
254 unsigned getMemScale() const {
255 assert(Kind == Memory && "Invalid access!");
259 bool isToken() const {return Kind == Token; }
261 bool isImm() const { return Kind == Immediate; }
263 bool isImmSExti16i8() const {
267 // If this isn't a constant expr, just assume it fits and let relaxation
269 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
273 // Otherwise, check the value is in a range that makes sense for this
275 return isImmSExti16i8Value(CE->getValue());
277 bool isImmSExti32i8() const {
281 // If this isn't a constant expr, just assume it fits and let relaxation
283 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
287 // Otherwise, check the value is in a range that makes sense for this
289 return isImmSExti32i8Value(CE->getValue());
291 bool isImmZExtu32u8() const {
295 // If this isn't a constant expr, just assume it fits and let relaxation
297 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
301 // Otherwise, check the value is in a range that makes sense for this
303 return isImmZExtu32u8Value(CE->getValue());
305 bool isImmSExti64i8() const {
309 // If this isn't a constant expr, just assume it fits and let relaxation
311 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
315 // Otherwise, check the value is in a range that makes sense for this
317 return isImmSExti64i8Value(CE->getValue());
319 bool isImmSExti64i32() const {
323 // If this isn't a constant expr, just assume it fits and let relaxation
325 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
329 // Otherwise, check the value is in a range that makes sense for this
331 return isImmSExti64i32Value(CE->getValue());
334 unsigned getMemSize() const {
335 assert(Kind == Memory && "Invalid access!");
339 bool isOffsetOf() const {
340 return OffsetOfLoc.getPointer();
343 bool needSizeDirective() const {
344 assert(Kind == Memory && "Invalid access!");
345 return Mem.NeedSizeDir;
348 bool isMem() const { return Kind == Memory; }
349 bool isMem8() const {
350 return Kind == Memory && (!Mem.Size || Mem.Size == 8);
352 bool isMem16() const {
353 return Kind == Memory && (!Mem.Size || Mem.Size == 16);
355 bool isMem32() const {
356 return Kind == Memory && (!Mem.Size || Mem.Size == 32);
358 bool isMem64() const {
359 return Kind == Memory && (!Mem.Size || Mem.Size == 64);
361 bool isMem80() const {
362 return Kind == Memory && (!Mem.Size || Mem.Size == 80);
364 bool isMem128() const {
365 return Kind == Memory && (!Mem.Size || Mem.Size == 128);
367 bool isMem256() const {
368 return Kind == Memory && (!Mem.Size || Mem.Size == 256);
371 bool isMemVX32() const {
372 return Kind == Memory && (!Mem.Size || Mem.Size == 32) &&
373 getMemIndexReg() >= X86::XMM0 && getMemIndexReg() <= X86::XMM15;
375 bool isMemVY32() const {
376 return Kind == Memory && (!Mem.Size || Mem.Size == 32) &&
377 getMemIndexReg() >= X86::YMM0 && getMemIndexReg() <= X86::YMM15;
379 bool isMemVX64() const {
380 return Kind == Memory && (!Mem.Size || Mem.Size == 64) &&
381 getMemIndexReg() >= X86::XMM0 && getMemIndexReg() <= X86::XMM15;
383 bool isMemVY64() const {
384 return Kind == Memory && (!Mem.Size || Mem.Size == 64) &&
385 getMemIndexReg() >= X86::YMM0 && getMemIndexReg() <= X86::YMM15;
388 bool isAbsMem() const {
389 return Kind == Memory && !getMemSegReg() && !getMemBaseReg() &&
390 !getMemIndexReg() && getMemScale() == 1;
393 bool isReg() const { return Kind == Register; }
395 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
396 // Add as immediates when possible.
397 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
398 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
400 Inst.addOperand(MCOperand::CreateExpr(Expr));
403 void addRegOperands(MCInst &Inst, unsigned N) const {
404 assert(N == 1 && "Invalid number of operands!");
405 Inst.addOperand(MCOperand::CreateReg(getReg()));
408 void addImmOperands(MCInst &Inst, unsigned N) const {
409 assert(N == 1 && "Invalid number of operands!");
410 addExpr(Inst, getImm());
413 void addMem8Operands(MCInst &Inst, unsigned N) const {
414 addMemOperands(Inst, N);
416 void addMem16Operands(MCInst &Inst, unsigned N) const {
417 addMemOperands(Inst, N);
419 void addMem32Operands(MCInst &Inst, unsigned N) const {
420 addMemOperands(Inst, N);
422 void addMem64Operands(MCInst &Inst, unsigned N) const {
423 addMemOperands(Inst, N);
425 void addMem80Operands(MCInst &Inst, unsigned N) const {
426 addMemOperands(Inst, N);
428 void addMem128Operands(MCInst &Inst, unsigned N) const {
429 addMemOperands(Inst, N);
431 void addMem256Operands(MCInst &Inst, unsigned N) const {
432 addMemOperands(Inst, N);
434 void addMemVX32Operands(MCInst &Inst, unsigned N) const {
435 addMemOperands(Inst, N);
437 void addMemVY32Operands(MCInst &Inst, unsigned N) const {
438 addMemOperands(Inst, N);
440 void addMemVX64Operands(MCInst &Inst, unsigned N) const {
441 addMemOperands(Inst, N);
443 void addMemVY64Operands(MCInst &Inst, unsigned N) const {
444 addMemOperands(Inst, N);
447 void addMemOperands(MCInst &Inst, unsigned N) const {
448 assert((N == 5) && "Invalid number of operands!");
449 Inst.addOperand(MCOperand::CreateReg(getMemBaseReg()));
450 Inst.addOperand(MCOperand::CreateImm(getMemScale()));
451 Inst.addOperand(MCOperand::CreateReg(getMemIndexReg()));
452 addExpr(Inst, getMemDisp());
453 Inst.addOperand(MCOperand::CreateReg(getMemSegReg()));
456 void addAbsMemOperands(MCInst &Inst, unsigned N) const {
457 assert((N == 1) && "Invalid number of operands!");
458 // Add as immediates when possible.
459 if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getMemDisp()))
460 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
462 Inst.addOperand(MCOperand::CreateExpr(getMemDisp()));
465 static X86Operand *CreateToken(StringRef Str, SMLoc Loc) {
466 SMLoc EndLoc = SMLoc::getFromPointer(Loc.getPointer() + Str.size());
467 X86Operand *Res = new X86Operand(Token, Loc, EndLoc);
468 Res->Tok.Data = Str.data();
469 Res->Tok.Length = Str.size();
473 static X86Operand *CreateReg(unsigned RegNo, SMLoc StartLoc, SMLoc EndLoc,
474 SMLoc OffsetOfLoc = SMLoc()) {
475 X86Operand *Res = new X86Operand(Register, StartLoc, EndLoc);
476 Res->Reg.RegNo = RegNo;
477 Res->OffsetOfLoc = OffsetOfLoc;
481 static X86Operand *CreateImm(const MCExpr *Val, SMLoc StartLoc, SMLoc EndLoc,
482 bool NeedRewrite = true){
483 X86Operand *Res = new X86Operand(Immediate, StartLoc, EndLoc);
485 Res->Imm.NeedAsmRewrite = NeedRewrite;
489 /// Create an absolute memory operand.
490 static X86Operand *CreateMem(const MCExpr *Disp, SMLoc StartLoc, SMLoc EndLoc,
491 unsigned Size = 0, bool NeedSizeDir = false){
492 X86Operand *Res = new X86Operand(Memory, StartLoc, EndLoc);
494 Res->Mem.Disp = Disp;
495 Res->Mem.BaseReg = 0;
496 Res->Mem.IndexReg = 0;
498 Res->Mem.Size = Size;
499 Res->Mem.NeedSizeDir = NeedSizeDir;
503 /// Create a generalized memory operand.
504 static X86Operand *CreateMem(unsigned SegReg, const MCExpr *Disp,
505 unsigned BaseReg, unsigned IndexReg,
506 unsigned Scale, SMLoc StartLoc, SMLoc EndLoc,
507 unsigned Size = 0, bool NeedSizeDir = false) {
508 // We should never just have a displacement, that should be parsed as an
509 // absolute memory operand.
510 assert((SegReg || BaseReg || IndexReg) && "Invalid memory operand!");
512 // The scale should always be one of {1,2,4,8}.
513 assert(((Scale == 1 || Scale == 2 || Scale == 4 || Scale == 8)) &&
515 X86Operand *Res = new X86Operand(Memory, StartLoc, EndLoc);
516 Res->Mem.SegReg = SegReg;
517 Res->Mem.Disp = Disp;
518 Res->Mem.BaseReg = BaseReg;
519 Res->Mem.IndexReg = IndexReg;
520 Res->Mem.Scale = Scale;
521 Res->Mem.Size = Size;
522 Res->Mem.NeedSizeDir = NeedSizeDir;
527 } // end anonymous namespace.
529 bool X86AsmParser::isSrcOp(X86Operand &Op) {
530 unsigned basereg = is64BitMode() ? X86::RSI : X86::ESI;
532 return (Op.isMem() &&
533 (Op.Mem.SegReg == 0 || Op.Mem.SegReg == X86::DS) &&
534 isa<MCConstantExpr>(Op.Mem.Disp) &&
535 cast<MCConstantExpr>(Op.Mem.Disp)->getValue() == 0 &&
536 Op.Mem.BaseReg == basereg && Op.Mem.IndexReg == 0);
539 bool X86AsmParser::isDstOp(X86Operand &Op) {
540 unsigned basereg = is64BitMode() ? X86::RDI : X86::EDI;
543 (Op.Mem.SegReg == 0 || Op.Mem.SegReg == X86::ES) &&
544 isa<MCConstantExpr>(Op.Mem.Disp) &&
545 cast<MCConstantExpr>(Op.Mem.Disp)->getValue() == 0 &&
546 Op.Mem.BaseReg == basereg && Op.Mem.IndexReg == 0;
549 bool X86AsmParser::ParseRegister(unsigned &RegNo,
550 SMLoc &StartLoc, SMLoc &EndLoc) {
552 const AsmToken &PercentTok = Parser.getTok();
553 StartLoc = PercentTok.getLoc();
555 // If we encounter a %, ignore it. This code handles registers with and
556 // without the prefix, unprefixed registers can occur in cfi directives.
557 if (!isParsingIntelSyntax() && PercentTok.is(AsmToken::Percent))
558 Parser.Lex(); // Eat percent token.
560 const AsmToken &Tok = Parser.getTok();
561 EndLoc = Tok.getEndLoc();
563 if (Tok.isNot(AsmToken::Identifier)) {
564 if (isParsingIntelSyntax()) return true;
565 return Error(StartLoc, "invalid register name",
566 SMRange(StartLoc, EndLoc));
569 RegNo = MatchRegisterName(Tok.getString());
571 // If the match failed, try the register name as lowercase.
573 RegNo = MatchRegisterName(Tok.getString().lower());
575 if (!is64BitMode()) {
576 // FIXME: This should be done using Requires<In32BitMode> and
577 // Requires<In64BitMode> so "eiz" usage in 64-bit instructions can be also
579 // FIXME: Check AH, CH, DH, BH cannot be used in an instruction requiring a
581 if (RegNo == X86::RIZ ||
582 X86MCRegisterClasses[X86::GR64RegClassID].contains(RegNo) ||
583 X86II::isX86_64NonExtLowByteReg(RegNo) ||
584 X86II::isX86_64ExtendedReg(RegNo))
585 return Error(StartLoc, "register %"
586 + Tok.getString() + " is only available in 64-bit mode",
587 SMRange(StartLoc, EndLoc));
590 // Parse "%st" as "%st(0)" and "%st(1)", which is multiple tokens.
591 if (RegNo == 0 && (Tok.getString() == "st" || Tok.getString() == "ST")) {
593 Parser.Lex(); // Eat 'st'
595 // Check to see if we have '(4)' after %st.
596 if (getLexer().isNot(AsmToken::LParen))
601 const AsmToken &IntTok = Parser.getTok();
602 if (IntTok.isNot(AsmToken::Integer))
603 return Error(IntTok.getLoc(), "expected stack index");
604 switch (IntTok.getIntVal()) {
605 case 0: RegNo = X86::ST0; break;
606 case 1: RegNo = X86::ST1; break;
607 case 2: RegNo = X86::ST2; break;
608 case 3: RegNo = X86::ST3; break;
609 case 4: RegNo = X86::ST4; break;
610 case 5: RegNo = X86::ST5; break;
611 case 6: RegNo = X86::ST6; break;
612 case 7: RegNo = X86::ST7; break;
613 default: return Error(IntTok.getLoc(), "invalid stack index");
616 if (getParser().Lex().isNot(AsmToken::RParen))
617 return Error(Parser.getTok().getLoc(), "expected ')'");
619 EndLoc = Parser.getTok().getEndLoc();
620 Parser.Lex(); // Eat ')'
624 EndLoc = Parser.getTok().getEndLoc();
626 // If this is "db[0-7]", match it as an alias
628 if (RegNo == 0 && Tok.getString().size() == 3 &&
629 Tok.getString().startswith("db")) {
630 switch (Tok.getString()[2]) {
631 case '0': RegNo = X86::DR0; break;
632 case '1': RegNo = X86::DR1; break;
633 case '2': RegNo = X86::DR2; break;
634 case '3': RegNo = X86::DR3; break;
635 case '4': RegNo = X86::DR4; break;
636 case '5': RegNo = X86::DR5; break;
637 case '6': RegNo = X86::DR6; break;
638 case '7': RegNo = X86::DR7; break;
642 EndLoc = Parser.getTok().getEndLoc();
643 Parser.Lex(); // Eat it.
649 if (isParsingIntelSyntax()) return true;
650 return Error(StartLoc, "invalid register name",
651 SMRange(StartLoc, EndLoc));
654 Parser.Lex(); // Eat identifier token.
658 X86Operand *X86AsmParser::ParseOperand() {
659 if (isParsingIntelSyntax())
660 return ParseIntelOperand();
661 return ParseATTOperand();
664 /// getIntelMemOperandSize - Return intel memory operand size.
665 static unsigned getIntelMemOperandSize(StringRef OpStr) {
666 unsigned Size = StringSwitch<unsigned>(OpStr)
667 .Cases("BYTE", "byte", 8)
668 .Cases("WORD", "word", 16)
669 .Cases("DWORD", "dword", 32)
670 .Cases("QWORD", "qword", 64)
671 .Cases("XWORD", "xword", 80)
672 .Cases("XMMWORD", "xmmword", 128)
673 .Cases("YMMWORD", "ymmword", 256)
678 X86Operand *X86AsmParser::ParseIntelBracExpression(unsigned SegReg,
680 unsigned BaseReg = 0, IndexReg = 0, Scale = 1;
681 const AsmToken &Tok = Parser.getTok();
682 SMLoc Start = Tok.getLoc(), End = Tok.getEndLoc();
684 const MCExpr *Disp = MCConstantExpr::Create(0, getContext());
685 // Parse [ BaseReg + Scale*IndexReg + Disp ] or [ symbol ]
688 if (getLexer().isNot(AsmToken::LBrac))
689 return ErrorOperand(Start, "Expected '[' token!");
692 if (getLexer().is(AsmToken::Identifier)) {
694 if (ParseRegister(BaseReg, Start, End)) {
695 // Handle '[' 'symbol' ']'
696 if (getParser().ParseExpression(Disp, End)) return 0;
697 if (getLexer().isNot(AsmToken::RBrac))
698 return ErrorOperand(Parser.getTok().getLoc(), "Expected ']' token!");
699 End = Parser.getTok().getEndLoc();
701 return X86Operand::CreateMem(Disp, Start, End, Size);
703 } else if (getLexer().is(AsmToken::Integer)) {
704 int64_t Val = Tok.getIntVal();
706 SMLoc Loc = Tok.getLoc();
707 if (getLexer().is(AsmToken::RBrac)) {
708 // Handle '[' number ']'
709 End = Parser.getTok().getEndLoc();
711 const MCExpr *Disp = MCConstantExpr::Create(Val, getContext());
713 return X86Operand::CreateMem(SegReg, Disp, 0, 0, Scale,
715 return X86Operand::CreateMem(Disp, Start, End, Size);
716 } else if (getLexer().is(AsmToken::Star)) {
717 // Handle '[' Scale*IndexReg ']'
719 SMLoc IdxRegLoc = Tok.getLoc();
720 if (ParseRegister(IndexReg, IdxRegLoc, End))
721 return ErrorOperand(IdxRegLoc, "Expected register");
724 return ErrorOperand(Loc, "Unexpected token");
727 // Parse ][ as a plus.
728 bool ExpectRBrac = true;
729 if (getLexer().is(AsmToken::RBrac)) {
731 End = Parser.getTok().getEndLoc();
735 if (getLexer().is(AsmToken::Plus) || getLexer().is(AsmToken::Minus) ||
736 getLexer().is(AsmToken::LBrac)) {
738 bool isPlus = getLexer().is(AsmToken::Plus) ||
739 getLexer().is(AsmToken::LBrac);
741 SMLoc PlusLoc = Tok.getLoc();
742 if (getLexer().is(AsmToken::Integer)) {
743 int64_t Val = Tok.getIntVal();
745 if (getLexer().is(AsmToken::Star)) {
747 SMLoc IdxRegLoc = Tok.getLoc();
748 if (ParseRegister(IndexReg, IdxRegLoc, End))
749 return ErrorOperand(IdxRegLoc, "Expected register");
751 } else if (getLexer().is(AsmToken::RBrac)) {
752 const MCExpr *ValExpr = MCConstantExpr::Create(Val, getContext());
753 Disp = isPlus ? ValExpr : MCConstantExpr::Create(0-Val, getContext());
755 return ErrorOperand(PlusLoc, "unexpected token after +");
756 } else if (getLexer().is(AsmToken::Identifier)) {
757 // This could be an index register or a displacement expression.
759 ParseRegister(IndexReg, Start, End);
760 else if (getParser().ParseExpression(Disp, End))
765 // Parse ][ as a plus.
766 if (getLexer().is(AsmToken::RBrac)) {
768 End = Parser.getTok().getEndLoc();
770 if (getLexer().is(AsmToken::LBrac)) {
773 if (getParser().ParseExpression(Disp, End))
776 } else if (ExpectRBrac) {
777 if (getParser().ParseExpression(Disp, End))
782 if (getLexer().isNot(AsmToken::RBrac))
783 return ErrorOperand(End, "expected ']' token!");
784 End = Parser.getTok().getEndLoc();
788 // Parse the dot operator (e.g., [ebx].foo.bar).
789 if (Tok.getString().startswith(".")) {
791 const MCExpr *NewDisp;
792 if (ParseIntelDotOperator(Disp, &NewDisp, Err))
793 return ErrorOperand(Tok.getLoc(), Err);
795 End = Parser.getTok().getEndLoc();
796 Parser.Lex(); // Eat the field.
801 if (!BaseReg && !IndexReg)
802 return X86Operand::CreateMem(Disp, Start, End, Size);
804 return X86Operand::CreateMem(SegReg, Disp, BaseReg, IndexReg, Scale,
808 /// ParseIntelMemOperand - Parse intel style memory operand.
809 X86Operand *X86AsmParser::ParseIntelMemOperand(unsigned SegReg, SMLoc Start) {
810 const AsmToken &Tok = Parser.getTok();
813 unsigned Size = getIntelMemOperandSize(Tok.getString());
816 assert ((Tok.getString() == "PTR" || Tok.getString() == "ptr") &&
817 "Unexpected token!");
821 if (getLexer().is(AsmToken::LBrac))
822 return ParseIntelBracExpression(SegReg, Size);
824 if (!ParseRegister(SegReg, Start, End)) {
825 // Handel SegReg : [ ... ]
826 if (getLexer().isNot(AsmToken::Colon))
827 return ErrorOperand(Start, "Expected ':' token!");
828 Parser.Lex(); // Eat :
829 if (getLexer().isNot(AsmToken::LBrac))
830 return ErrorOperand(Start, "Expected '[' token!");
831 return ParseIntelBracExpression(SegReg, Size);
834 const MCExpr *Disp = MCConstantExpr::Create(0, getParser().getContext());
835 if (getParser().ParseExpression(Disp, End))
838 bool NeedSizeDir = false;
839 if (!Size && isParsingInlineAsm()) {
840 if (const MCSymbolRefExpr *SymRef = dyn_cast<MCSymbolRefExpr>(Disp)) {
841 const MCSymbol &Sym = SymRef->getSymbol();
842 // FIXME: The SemaLookup will fail if the name is anything other then an
844 // FIXME: Pass a valid SMLoc.
845 SemaCallback->LookupInlineAsmIdentifier(Sym.getName(), NULL, Size);
846 NeedSizeDir = Size > 0;
849 if (!isParsingInlineAsm())
850 return X86Operand::CreateMem(Disp, Start, End, Size);
852 // When parsing inline assembly we set the base register to a non-zero value
853 // as we don't know the actual value at this time. This is necessary to
854 // get the matching correct in some cases.
855 return X86Operand::CreateMem(/*SegReg*/0, Disp, /*BaseReg*/1, /*IndexReg*/0,
856 /*Scale*/1, Start, End, Size, NeedSizeDir);
859 /// Parse the '.' operator.
860 bool X86AsmParser::ParseIntelDotOperator(const MCExpr *Disp,
861 const MCExpr **NewDisp,
862 SmallString<64> &Err) {
863 AsmToken Tok = *&Parser.getTok();
864 uint64_t OrigDispVal, DotDispVal;
866 // FIXME: Handle non-constant expressions.
867 if (const MCConstantExpr *OrigDisp = dyn_cast<MCConstantExpr>(Disp)) {
868 OrigDispVal = OrigDisp->getValue();
870 Err = "Non-constant offsets are not supported!";
875 StringRef DotDispStr = Tok.getString().drop_front(1);
877 // .Imm gets lexed as a real.
878 if (Tok.is(AsmToken::Real)) {
880 DotDispStr.getAsInteger(10, DotDisp);
881 DotDispVal = DotDisp.getZExtValue();
882 } else if (Tok.is(AsmToken::Identifier)) {
883 // We should only see an identifier when parsing the original inline asm.
884 // The front-end should rewrite this in terms of immediates.
885 assert (isParsingInlineAsm() && "Unexpected field name!");
888 std::pair<StringRef, StringRef> BaseMember = DotDispStr.split('.');
889 if (SemaCallback->LookupInlineAsmField(BaseMember.first, BaseMember.second,
891 Err = "Unable to lookup field reference!";
894 DotDispVal = DotDisp;
896 Err = "Unexpected token type!";
900 if (isParsingInlineAsm() && Tok.is(AsmToken::Identifier)) {
901 SMLoc Loc = SMLoc::getFromPointer(DotDispStr.data());
902 unsigned Len = DotDispStr.size();
903 unsigned Val = OrigDispVal + DotDispVal;
904 InstInfo->AsmRewrites->push_back(AsmRewrite(AOK_DotOperator, Loc, Len,
908 *NewDisp = MCConstantExpr::Create(OrigDispVal + DotDispVal, getContext());
912 /// Parse the 'offset' operator. This operator is used to specify the
913 /// location rather then the content of a variable.
914 X86Operand *X86AsmParser::ParseIntelOffsetOfOperator(SMLoc Start) {
915 SMLoc OffsetOfLoc = Start;
916 Parser.Lex(); // Eat offset.
917 Start = Parser.getTok().getLoc();
918 assert (Parser.getTok().is(AsmToken::Identifier) && "Expected an identifier");
922 if (getParser().ParseExpression(Val, End))
923 return ErrorOperand(Start, "Unable to parse expression!");
925 // Don't emit the offset operator.
926 InstInfo->AsmRewrites->push_back(AsmRewrite(AOK_Skip, OffsetOfLoc, 7));
928 // The offset operator will have an 'r' constraint, thus we need to create
929 // register operand to ensure proper matching. Just pick a GPR based on
930 // the size of a pointer.
931 unsigned RegNo = is64BitMode() ? X86::RBX : X86::EBX;
932 return X86Operand::CreateReg(RegNo, Start, End, OffsetOfLoc);
935 /// Parse the 'TYPE' operator. The TYPE operator returns the size of a C or
936 /// C++ type or variable. If the variable is an array, TYPE returns the size of
937 /// a single element of the array.
938 X86Operand *X86AsmParser::ParseIntelTypeOperator(SMLoc Start) {
939 SMLoc TypeLoc = Start;
940 Parser.Lex(); // Eat offset.
941 Start = Parser.getTok().getLoc();
942 assert (Parser.getTok().is(AsmToken::Identifier) && "Expected an identifier");
946 if (getParser().ParseExpression(Val, End))
950 if (const MCSymbolRefExpr *SymRef = dyn_cast<MCSymbolRefExpr>(Val)) {
951 const MCSymbol &Sym = SymRef->getSymbol();
952 // FIXME: The SemaLookup will fail if the name is anything other then an
954 // FIXME: Pass a valid SMLoc.
955 if (!SemaCallback->LookupInlineAsmIdentifier(Sym.getName(), NULL, Size))
956 return ErrorOperand(Start, "Unable to lookup TYPE of expr!");
958 Size /= 8; // Size is in terms of bits, but we want bytes in the context.
961 // Rewrite the type operator and the C or C++ type or variable in terms of an
962 // immediate. E.g. TYPE foo -> $$4
963 unsigned Len = End.getPointer() - TypeLoc.getPointer();
964 InstInfo->AsmRewrites->push_back(AsmRewrite(AOK_Imm, TypeLoc, Len, Size));
966 const MCExpr *Imm = MCConstantExpr::Create(Size, getContext());
967 return X86Operand::CreateImm(Imm, Start, End, /*NeedAsmRewrite*/false);
970 X86Operand *X86AsmParser::ParseIntelOperand() {
971 SMLoc Start = Parser.getTok().getLoc(), End;
974 StringRef AsmTokStr = Parser.getTok().getString();
975 if ((AsmTokStr == "offset" || AsmTokStr == "OFFSET") &&
976 isParsingInlineAsm())
977 return ParseIntelOffsetOfOperator(Start);
980 if ((AsmTokStr == "type" || AsmTokStr == "TYPE") &&
981 isParsingInlineAsm())
982 return ParseIntelTypeOperator(Start);
984 // Unsupported directives.
985 if (isParsingIntelSyntax() &&
986 (AsmTokStr == "size" || AsmTokStr == "SIZE" ||
987 AsmTokStr == "length" || AsmTokStr == "LENGTH"))
988 return ErrorOperand(Start, "Unsupported directive!");
991 if (getLexer().is(AsmToken::Integer) || getLexer().is(AsmToken::Real) ||
992 getLexer().is(AsmToken::Minus)) {
994 if (!getParser().ParseExpression(Val, End)) {
995 return X86Operand::CreateImm(Val, Start, End);
1001 if (!ParseRegister(RegNo, Start, End)) {
1002 // If this is a segment register followed by a ':', then this is the start
1003 // of a memory reference, otherwise this is a normal register reference.
1004 if (getLexer().isNot(AsmToken::Colon))
1005 return X86Operand::CreateReg(RegNo, Start, End);
1007 getParser().Lex(); // Eat the colon.
1008 return ParseIntelMemOperand(RegNo, Start);
1012 return ParseIntelMemOperand(0, Start);
1015 X86Operand *X86AsmParser::ParseATTOperand() {
1016 switch (getLexer().getKind()) {
1018 // Parse a memory operand with no segment register.
1019 return ParseMemOperand(0, Parser.getTok().getLoc());
1020 case AsmToken::Percent: {
1021 // Read the register.
1024 if (ParseRegister(RegNo, Start, End)) return 0;
1025 if (RegNo == X86::EIZ || RegNo == X86::RIZ) {
1026 Error(Start, "%eiz and %riz can only be used as index registers",
1027 SMRange(Start, End));
1031 // If this is a segment register followed by a ':', then this is the start
1032 // of a memory reference, otherwise this is a normal register reference.
1033 if (getLexer().isNot(AsmToken::Colon))
1034 return X86Operand::CreateReg(RegNo, Start, End);
1037 getParser().Lex(); // Eat the colon.
1038 return ParseMemOperand(RegNo, Start);
1040 case AsmToken::Dollar: {
1041 // $42 -> immediate.
1042 SMLoc Start = Parser.getTok().getLoc(), End;
1045 if (getParser().ParseExpression(Val, End))
1047 return X86Operand::CreateImm(Val, Start, End);
1052 /// ParseMemOperand: segment: disp(basereg, indexreg, scale). The '%ds:' prefix
1053 /// has already been parsed if present.
1054 X86Operand *X86AsmParser::ParseMemOperand(unsigned SegReg, SMLoc MemStart) {
1056 // We have to disambiguate a parenthesized expression "(4+5)" from the start
1057 // of a memory operand with a missing displacement "(%ebx)" or "(,%eax)". The
1058 // only way to do this without lookahead is to eat the '(' and see what is
1060 const MCExpr *Disp = MCConstantExpr::Create(0, getParser().getContext());
1061 if (getLexer().isNot(AsmToken::LParen)) {
1063 if (getParser().ParseExpression(Disp, ExprEnd)) return 0;
1065 // After parsing the base expression we could either have a parenthesized
1066 // memory address or not. If not, return now. If so, eat the (.
1067 if (getLexer().isNot(AsmToken::LParen)) {
1068 // Unless we have a segment register, treat this as an immediate.
1070 return X86Operand::CreateMem(Disp, MemStart, ExprEnd);
1071 return X86Operand::CreateMem(SegReg, Disp, 0, 0, 1, MemStart, ExprEnd);
1077 // Okay, we have a '('. We don't know if this is an expression or not, but
1078 // so we have to eat the ( to see beyond it.
1079 SMLoc LParenLoc = Parser.getTok().getLoc();
1080 Parser.Lex(); // Eat the '('.
1082 if (getLexer().is(AsmToken::Percent) || getLexer().is(AsmToken::Comma)) {
1083 // Nothing to do here, fall into the code below with the '(' part of the
1084 // memory operand consumed.
1088 // It must be an parenthesized expression, parse it now.
1089 if (getParser().ParseParenExpression(Disp, ExprEnd))
1092 // After parsing the base expression we could either have a parenthesized
1093 // memory address or not. If not, return now. If so, eat the (.
1094 if (getLexer().isNot(AsmToken::LParen)) {
1095 // Unless we have a segment register, treat this as an immediate.
1097 return X86Operand::CreateMem(Disp, LParenLoc, ExprEnd);
1098 return X86Operand::CreateMem(SegReg, Disp, 0, 0, 1, MemStart, ExprEnd);
1106 // If we reached here, then we just ate the ( of the memory operand. Process
1107 // the rest of the memory operand.
1108 unsigned BaseReg = 0, IndexReg = 0, Scale = 1;
1111 if (getLexer().is(AsmToken::Percent)) {
1112 SMLoc StartLoc, EndLoc;
1113 if (ParseRegister(BaseReg, StartLoc, EndLoc)) return 0;
1114 if (BaseReg == X86::EIZ || BaseReg == X86::RIZ) {
1115 Error(StartLoc, "eiz and riz can only be used as index registers",
1116 SMRange(StartLoc, EndLoc));
1121 if (getLexer().is(AsmToken::Comma)) {
1122 Parser.Lex(); // Eat the comma.
1123 IndexLoc = Parser.getTok().getLoc();
1125 // Following the comma we should have either an index register, or a scale
1126 // value. We don't support the later form, but we want to parse it
1129 // Not that even though it would be completely consistent to support syntax
1130 // like "1(%eax,,1)", the assembler doesn't. Use "eiz" or "riz" for this.
1131 if (getLexer().is(AsmToken::Percent)) {
1133 if (ParseRegister(IndexReg, L, L)) return 0;
1135 if (getLexer().isNot(AsmToken::RParen)) {
1136 // Parse the scale amount:
1137 // ::= ',' [scale-expression]
1138 if (getLexer().isNot(AsmToken::Comma)) {
1139 Error(Parser.getTok().getLoc(),
1140 "expected comma in scale expression");
1143 Parser.Lex(); // Eat the comma.
1145 if (getLexer().isNot(AsmToken::RParen)) {
1146 SMLoc Loc = Parser.getTok().getLoc();
1149 if (getParser().ParseAbsoluteExpression(ScaleVal)){
1150 Error(Loc, "expected scale expression");
1154 // Validate the scale amount.
1155 if (ScaleVal != 1 && ScaleVal != 2 && ScaleVal != 4 && ScaleVal != 8){
1156 Error(Loc, "scale factor in address must be 1, 2, 4 or 8");
1159 Scale = (unsigned)ScaleVal;
1162 } else if (getLexer().isNot(AsmToken::RParen)) {
1163 // A scale amount without an index is ignored.
1165 SMLoc Loc = Parser.getTok().getLoc();
1168 if (getParser().ParseAbsoluteExpression(Value))
1172 Warning(Loc, "scale factor without index register is ignored");
1177 // Ok, we've eaten the memory operand, verify we have a ')' and eat it too.
1178 if (getLexer().isNot(AsmToken::RParen)) {
1179 Error(Parser.getTok().getLoc(), "unexpected token in memory operand");
1182 SMLoc MemEnd = Parser.getTok().getEndLoc();
1183 Parser.Lex(); // Eat the ')'.
1185 // If we have both a base register and an index register make sure they are
1186 // both 64-bit or 32-bit registers.
1187 // To support VSIB, IndexReg can be 128-bit or 256-bit registers.
1188 if (BaseReg != 0 && IndexReg != 0) {
1189 if (X86MCRegisterClasses[X86::GR64RegClassID].contains(BaseReg) &&
1190 (X86MCRegisterClasses[X86::GR16RegClassID].contains(IndexReg) ||
1191 X86MCRegisterClasses[X86::GR32RegClassID].contains(IndexReg)) &&
1192 IndexReg != X86::RIZ) {
1193 Error(IndexLoc, "index register is 32-bit, but base register is 64-bit");
1196 if (X86MCRegisterClasses[X86::GR32RegClassID].contains(BaseReg) &&
1197 (X86MCRegisterClasses[X86::GR16RegClassID].contains(IndexReg) ||
1198 X86MCRegisterClasses[X86::GR64RegClassID].contains(IndexReg)) &&
1199 IndexReg != X86::EIZ){
1200 Error(IndexLoc, "index register is 64-bit, but base register is 32-bit");
1205 return X86Operand::CreateMem(SegReg, Disp, BaseReg, IndexReg, Scale,
1210 ParseInstruction(ParseInstructionInfo &Info, StringRef Name, SMLoc NameLoc,
1211 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
1213 StringRef PatchedName = Name;
1215 // FIXME: Hack to recognize setneb as setne.
1216 if (PatchedName.startswith("set") && PatchedName.endswith("b") &&
1217 PatchedName != "setb" && PatchedName != "setnb")
1218 PatchedName = PatchedName.substr(0, Name.size()-1);
1220 // FIXME: Hack to recognize cmp<comparison code>{ss,sd,ps,pd}.
1221 const MCExpr *ExtraImmOp = 0;
1222 if ((PatchedName.startswith("cmp") || PatchedName.startswith("vcmp")) &&
1223 (PatchedName.endswith("ss") || PatchedName.endswith("sd") ||
1224 PatchedName.endswith("ps") || PatchedName.endswith("pd"))) {
1225 bool IsVCMP = PatchedName[0] == 'v';
1226 unsigned SSECCIdx = IsVCMP ? 4 : 3;
1227 unsigned SSEComparisonCode = StringSwitch<unsigned>(
1228 PatchedName.slice(SSECCIdx, PatchedName.size() - 2))
1232 .Case("unord", 0x03)
1237 /* AVX only from here */
1238 .Case("eq_uq", 0x08)
1241 .Case("false", 0x0B)
1242 .Case("neq_oq", 0x0C)
1246 .Case("eq_os", 0x10)
1247 .Case("lt_oq", 0x11)
1248 .Case("le_oq", 0x12)
1249 .Case("unord_s", 0x13)
1250 .Case("neq_us", 0x14)
1251 .Case("nlt_uq", 0x15)
1252 .Case("nle_uq", 0x16)
1253 .Case("ord_s", 0x17)
1254 .Case("eq_us", 0x18)
1255 .Case("nge_uq", 0x19)
1256 .Case("ngt_uq", 0x1A)
1257 .Case("false_os", 0x1B)
1258 .Case("neq_os", 0x1C)
1259 .Case("ge_oq", 0x1D)
1260 .Case("gt_oq", 0x1E)
1261 .Case("true_us", 0x1F)
1263 if (SSEComparisonCode != ~0U && (IsVCMP || SSEComparisonCode < 8)) {
1264 ExtraImmOp = MCConstantExpr::Create(SSEComparisonCode,
1265 getParser().getContext());
1266 if (PatchedName.endswith("ss")) {
1267 PatchedName = IsVCMP ? "vcmpss" : "cmpss";
1268 } else if (PatchedName.endswith("sd")) {
1269 PatchedName = IsVCMP ? "vcmpsd" : "cmpsd";
1270 } else if (PatchedName.endswith("ps")) {
1271 PatchedName = IsVCMP ? "vcmpps" : "cmpps";
1273 assert(PatchedName.endswith("pd") && "Unexpected mnemonic!");
1274 PatchedName = IsVCMP ? "vcmppd" : "cmppd";
1279 Operands.push_back(X86Operand::CreateToken(PatchedName, NameLoc));
1281 if (ExtraImmOp && !isParsingIntelSyntax())
1282 Operands.push_back(X86Operand::CreateImm(ExtraImmOp, NameLoc, NameLoc));
1284 // Determine whether this is an instruction prefix.
1286 Name == "lock" || Name == "rep" ||
1287 Name == "repe" || Name == "repz" ||
1288 Name == "repne" || Name == "repnz" ||
1289 Name == "rex64" || Name == "data16";
1292 // This does the actual operand parsing. Don't parse any more if we have a
1293 // prefix juxtaposed with an operation like "lock incl 4(%rax)", because we
1294 // just want to parse the "lock" as the first instruction and the "incl" as
1296 if (getLexer().isNot(AsmToken::EndOfStatement) && !isPrefix) {
1298 // Parse '*' modifier.
1299 if (getLexer().is(AsmToken::Star)) {
1300 SMLoc Loc = Parser.getTok().getLoc();
1301 Operands.push_back(X86Operand::CreateToken("*", Loc));
1302 Parser.Lex(); // Eat the star.
1305 // Read the first operand.
1306 if (X86Operand *Op = ParseOperand())
1307 Operands.push_back(Op);
1309 Parser.EatToEndOfStatement();
1313 while (getLexer().is(AsmToken::Comma)) {
1314 Parser.Lex(); // Eat the comma.
1316 // Parse and remember the operand.
1317 if (X86Operand *Op = ParseOperand())
1318 Operands.push_back(Op);
1320 Parser.EatToEndOfStatement();
1325 if (getLexer().isNot(AsmToken::EndOfStatement)) {
1326 SMLoc Loc = getLexer().getLoc();
1327 Parser.EatToEndOfStatement();
1328 return Error(Loc, "unexpected token in argument list");
1332 if (getLexer().is(AsmToken::EndOfStatement))
1333 Parser.Lex(); // Consume the EndOfStatement
1334 else if (isPrefix && getLexer().is(AsmToken::Slash))
1335 Parser.Lex(); // Consume the prefix separator Slash
1337 if (ExtraImmOp && isParsingIntelSyntax())
1338 Operands.push_back(X86Operand::CreateImm(ExtraImmOp, NameLoc, NameLoc));
1340 // This is a terrible hack to handle "out[bwl]? %al, (%dx)" ->
1341 // "outb %al, %dx". Out doesn't take a memory form, but this is a widely
1342 // documented form in various unofficial manuals, so a lot of code uses it.
1343 if ((Name == "outb" || Name == "outw" || Name == "outl" || Name == "out") &&
1344 Operands.size() == 3) {
1345 X86Operand &Op = *(X86Operand*)Operands.back();
1346 if (Op.isMem() && Op.Mem.SegReg == 0 &&
1347 isa<MCConstantExpr>(Op.Mem.Disp) &&
1348 cast<MCConstantExpr>(Op.Mem.Disp)->getValue() == 0 &&
1349 Op.Mem.BaseReg == MatchRegisterName("dx") && Op.Mem.IndexReg == 0) {
1350 SMLoc Loc = Op.getEndLoc();
1351 Operands.back() = X86Operand::CreateReg(Op.Mem.BaseReg, Loc, Loc);
1355 // Same hack for "in[bwl]? (%dx), %al" -> "inb %dx, %al".
1356 if ((Name == "inb" || Name == "inw" || Name == "inl" || Name == "in") &&
1357 Operands.size() == 3) {
1358 X86Operand &Op = *(X86Operand*)Operands.begin()[1];
1359 if (Op.isMem() && Op.Mem.SegReg == 0 &&
1360 isa<MCConstantExpr>(Op.Mem.Disp) &&
1361 cast<MCConstantExpr>(Op.Mem.Disp)->getValue() == 0 &&
1362 Op.Mem.BaseReg == MatchRegisterName("dx") && Op.Mem.IndexReg == 0) {
1363 SMLoc Loc = Op.getEndLoc();
1364 Operands.begin()[1] = X86Operand::CreateReg(Op.Mem.BaseReg, Loc, Loc);
1368 // Transform "ins[bwl] %dx, %es:(%edi)" into "ins[bwl]"
1369 if (Name.startswith("ins") && Operands.size() == 3 &&
1370 (Name == "insb" || Name == "insw" || Name == "insl")) {
1371 X86Operand &Op = *(X86Operand*)Operands.begin()[1];
1372 X86Operand &Op2 = *(X86Operand*)Operands.begin()[2];
1373 if (Op.isReg() && Op.getReg() == X86::DX && isDstOp(Op2)) {
1374 Operands.pop_back();
1375 Operands.pop_back();
1381 // Transform "outs[bwl] %ds:(%esi), %dx" into "out[bwl]"
1382 if (Name.startswith("outs") && Operands.size() == 3 &&
1383 (Name == "outsb" || Name == "outsw" || Name == "outsl")) {
1384 X86Operand &Op = *(X86Operand*)Operands.begin()[1];
1385 X86Operand &Op2 = *(X86Operand*)Operands.begin()[2];
1386 if (isSrcOp(Op) && Op2.isReg() && Op2.getReg() == X86::DX) {
1387 Operands.pop_back();
1388 Operands.pop_back();
1394 // Transform "movs[bwl] %ds:(%esi), %es:(%edi)" into "movs[bwl]"
1395 if (Name.startswith("movs") && Operands.size() == 3 &&
1396 (Name == "movsb" || Name == "movsw" || Name == "movsl" ||
1397 (is64BitMode() && Name == "movsq"))) {
1398 X86Operand &Op = *(X86Operand*)Operands.begin()[1];
1399 X86Operand &Op2 = *(X86Operand*)Operands.begin()[2];
1400 if (isSrcOp(Op) && isDstOp(Op2)) {
1401 Operands.pop_back();
1402 Operands.pop_back();
1407 // Transform "lods[bwl] %ds:(%esi),{%al,%ax,%eax,%rax}" into "lods[bwl]"
1408 if (Name.startswith("lods") && Operands.size() == 3 &&
1409 (Name == "lods" || Name == "lodsb" || Name == "lodsw" ||
1410 Name == "lodsl" || (is64BitMode() && Name == "lodsq"))) {
1411 X86Operand *Op1 = static_cast<X86Operand*>(Operands[1]);
1412 X86Operand *Op2 = static_cast<X86Operand*>(Operands[2]);
1413 if (isSrcOp(*Op1) && Op2->isReg()) {
1415 unsigned reg = Op2->getReg();
1416 bool isLods = Name == "lods";
1417 if (reg == X86::AL && (isLods || Name == "lodsb"))
1419 else if (reg == X86::AX && (isLods || Name == "lodsw"))
1421 else if (reg == X86::EAX && (isLods || Name == "lodsl"))
1423 else if (reg == X86::RAX && (isLods || Name == "lodsq"))
1428 Operands.pop_back();
1429 Operands.pop_back();
1433 static_cast<X86Operand*>(Operands[0])->setTokenValue(ins);
1437 // Transform "stos[bwl] {%al,%ax,%eax,%rax},%es:(%edi)" into "stos[bwl]"
1438 if (Name.startswith("stos") && Operands.size() == 3 &&
1439 (Name == "stos" || Name == "stosb" || Name == "stosw" ||
1440 Name == "stosl" || (is64BitMode() && Name == "stosq"))) {
1441 X86Operand *Op1 = static_cast<X86Operand*>(Operands[1]);
1442 X86Operand *Op2 = static_cast<X86Operand*>(Operands[2]);
1443 if (isDstOp(*Op2) && Op1->isReg()) {
1445 unsigned reg = Op1->getReg();
1446 bool isStos = Name == "stos";
1447 if (reg == X86::AL && (isStos || Name == "stosb"))
1449 else if (reg == X86::AX && (isStos || Name == "stosw"))
1451 else if (reg == X86::EAX && (isStos || Name == "stosl"))
1453 else if (reg == X86::RAX && (isStos || Name == "stosq"))
1458 Operands.pop_back();
1459 Operands.pop_back();
1463 static_cast<X86Operand*>(Operands[0])->setTokenValue(ins);
1468 // FIXME: Hack to handle recognize s{hr,ar,hl} $1, <op>. Canonicalize to
1470 if ((Name.startswith("shr") || Name.startswith("sar") ||
1471 Name.startswith("shl") || Name.startswith("sal") ||
1472 Name.startswith("rcl") || Name.startswith("rcr") ||
1473 Name.startswith("rol") || Name.startswith("ror")) &&
1474 Operands.size() == 3) {
1475 if (isParsingIntelSyntax()) {
1477 X86Operand *Op1 = static_cast<X86Operand*>(Operands[2]);
1478 if (Op1->isImm() && isa<MCConstantExpr>(Op1->getImm()) &&
1479 cast<MCConstantExpr>(Op1->getImm())->getValue() == 1) {
1481 Operands.pop_back();
1484 X86Operand *Op1 = static_cast<X86Operand*>(Operands[1]);
1485 if (Op1->isImm() && isa<MCConstantExpr>(Op1->getImm()) &&
1486 cast<MCConstantExpr>(Op1->getImm())->getValue() == 1) {
1488 Operands.erase(Operands.begin() + 1);
1493 // Transforms "int $3" into "int3" as a size optimization. We can't write an
1494 // instalias with an immediate operand yet.
1495 if (Name == "int" && Operands.size() == 2) {
1496 X86Operand *Op1 = static_cast<X86Operand*>(Operands[1]);
1497 if (Op1->isImm() && isa<MCConstantExpr>(Op1->getImm()) &&
1498 cast<MCConstantExpr>(Op1->getImm())->getValue() == 3) {
1500 Operands.erase(Operands.begin() + 1);
1501 static_cast<X86Operand*>(Operands[0])->setTokenValue("int3");
1509 processInstruction(MCInst &Inst,
1510 const SmallVectorImpl<MCParsedAsmOperand*> &Ops) {
1511 switch (Inst.getOpcode()) {
1512 default: return false;
1513 case X86::AND16i16: {
1514 if (!Inst.getOperand(0).isImm() ||
1515 !isImmSExti16i8Value(Inst.getOperand(0).getImm()))
1519 TmpInst.setOpcode(X86::AND16ri8);
1520 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1521 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1522 TmpInst.addOperand(Inst.getOperand(0));
1526 case X86::AND32i32: {
1527 if (!Inst.getOperand(0).isImm() ||
1528 !isImmSExti32i8Value(Inst.getOperand(0).getImm()))
1532 TmpInst.setOpcode(X86::AND32ri8);
1533 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1534 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1535 TmpInst.addOperand(Inst.getOperand(0));
1539 case X86::AND64i32: {
1540 if (!Inst.getOperand(0).isImm() ||
1541 !isImmSExti64i8Value(Inst.getOperand(0).getImm()))
1545 TmpInst.setOpcode(X86::AND64ri8);
1546 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1547 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1548 TmpInst.addOperand(Inst.getOperand(0));
1552 case X86::XOR16i16: {
1553 if (!Inst.getOperand(0).isImm() ||
1554 !isImmSExti16i8Value(Inst.getOperand(0).getImm()))
1558 TmpInst.setOpcode(X86::XOR16ri8);
1559 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1560 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1561 TmpInst.addOperand(Inst.getOperand(0));
1565 case X86::XOR32i32: {
1566 if (!Inst.getOperand(0).isImm() ||
1567 !isImmSExti32i8Value(Inst.getOperand(0).getImm()))
1571 TmpInst.setOpcode(X86::XOR32ri8);
1572 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1573 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1574 TmpInst.addOperand(Inst.getOperand(0));
1578 case X86::XOR64i32: {
1579 if (!Inst.getOperand(0).isImm() ||
1580 !isImmSExti64i8Value(Inst.getOperand(0).getImm()))
1584 TmpInst.setOpcode(X86::XOR64ri8);
1585 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1586 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1587 TmpInst.addOperand(Inst.getOperand(0));
1591 case X86::OR16i16: {
1592 if (!Inst.getOperand(0).isImm() ||
1593 !isImmSExti16i8Value(Inst.getOperand(0).getImm()))
1597 TmpInst.setOpcode(X86::OR16ri8);
1598 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1599 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1600 TmpInst.addOperand(Inst.getOperand(0));
1604 case X86::OR32i32: {
1605 if (!Inst.getOperand(0).isImm() ||
1606 !isImmSExti32i8Value(Inst.getOperand(0).getImm()))
1610 TmpInst.setOpcode(X86::OR32ri8);
1611 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1612 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1613 TmpInst.addOperand(Inst.getOperand(0));
1617 case X86::OR64i32: {
1618 if (!Inst.getOperand(0).isImm() ||
1619 !isImmSExti64i8Value(Inst.getOperand(0).getImm()))
1623 TmpInst.setOpcode(X86::OR64ri8);
1624 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1625 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1626 TmpInst.addOperand(Inst.getOperand(0));
1630 case X86::CMP16i16: {
1631 if (!Inst.getOperand(0).isImm() ||
1632 !isImmSExti16i8Value(Inst.getOperand(0).getImm()))
1636 TmpInst.setOpcode(X86::CMP16ri8);
1637 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1638 TmpInst.addOperand(Inst.getOperand(0));
1642 case X86::CMP32i32: {
1643 if (!Inst.getOperand(0).isImm() ||
1644 !isImmSExti32i8Value(Inst.getOperand(0).getImm()))
1648 TmpInst.setOpcode(X86::CMP32ri8);
1649 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1650 TmpInst.addOperand(Inst.getOperand(0));
1654 case X86::CMP64i32: {
1655 if (!Inst.getOperand(0).isImm() ||
1656 !isImmSExti64i8Value(Inst.getOperand(0).getImm()))
1660 TmpInst.setOpcode(X86::CMP64ri8);
1661 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1662 TmpInst.addOperand(Inst.getOperand(0));
1666 case X86::ADD16i16: {
1667 if (!Inst.getOperand(0).isImm() ||
1668 !isImmSExti16i8Value(Inst.getOperand(0).getImm()))
1672 TmpInst.setOpcode(X86::ADD16ri8);
1673 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1674 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1675 TmpInst.addOperand(Inst.getOperand(0));
1679 case X86::ADD32i32: {
1680 if (!Inst.getOperand(0).isImm() ||
1681 !isImmSExti32i8Value(Inst.getOperand(0).getImm()))
1685 TmpInst.setOpcode(X86::ADD32ri8);
1686 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1687 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1688 TmpInst.addOperand(Inst.getOperand(0));
1692 case X86::ADD64i32: {
1693 if (!Inst.getOperand(0).isImm() ||
1694 !isImmSExti64i8Value(Inst.getOperand(0).getImm()))
1698 TmpInst.setOpcode(X86::ADD64ri8);
1699 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1700 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1701 TmpInst.addOperand(Inst.getOperand(0));
1705 case X86::SUB16i16: {
1706 if (!Inst.getOperand(0).isImm() ||
1707 !isImmSExti16i8Value(Inst.getOperand(0).getImm()))
1711 TmpInst.setOpcode(X86::SUB16ri8);
1712 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1713 TmpInst.addOperand(MCOperand::CreateReg(X86::AX));
1714 TmpInst.addOperand(Inst.getOperand(0));
1718 case X86::SUB32i32: {
1719 if (!Inst.getOperand(0).isImm() ||
1720 !isImmSExti32i8Value(Inst.getOperand(0).getImm()))
1724 TmpInst.setOpcode(X86::SUB32ri8);
1725 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1726 TmpInst.addOperand(MCOperand::CreateReg(X86::EAX));
1727 TmpInst.addOperand(Inst.getOperand(0));
1731 case X86::SUB64i32: {
1732 if (!Inst.getOperand(0).isImm() ||
1733 !isImmSExti64i8Value(Inst.getOperand(0).getImm()))
1737 TmpInst.setOpcode(X86::SUB64ri8);
1738 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1739 TmpInst.addOperand(MCOperand::CreateReg(X86::RAX));
1740 TmpInst.addOperand(Inst.getOperand(0));
1747 static const char *getSubtargetFeatureName(unsigned Val);
1749 MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
1750 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
1751 MCStreamer &Out, unsigned &ErrorInfo,
1752 bool MatchingInlineAsm) {
1753 assert(!Operands.empty() && "Unexpect empty operand list!");
1754 X86Operand *Op = static_cast<X86Operand*>(Operands[0]);
1755 assert(Op->isToken() && "Leading operand should always be a mnemonic!");
1756 ArrayRef<SMRange> EmptyRanges = ArrayRef<SMRange>();
1758 // First, handle aliases that expand to multiple instructions.
1759 // FIXME: This should be replaced with a real .td file alias mechanism.
1760 // Also, MatchInstructionImpl should actually *do* the EmitInstruction
1762 if (Op->getToken() == "fstsw" || Op->getToken() == "fstcw" ||
1763 Op->getToken() == "fstsww" || Op->getToken() == "fstcww" ||
1764 Op->getToken() == "finit" || Op->getToken() == "fsave" ||
1765 Op->getToken() == "fstenv" || Op->getToken() == "fclex") {
1767 Inst.setOpcode(X86::WAIT);
1769 if (!MatchingInlineAsm)
1770 Out.EmitInstruction(Inst);
1773 StringSwitch<const char*>(Op->getToken())
1774 .Case("finit", "fninit")
1775 .Case("fsave", "fnsave")
1776 .Case("fstcw", "fnstcw")
1777 .Case("fstcww", "fnstcw")
1778 .Case("fstenv", "fnstenv")
1779 .Case("fstsw", "fnstsw")
1780 .Case("fstsww", "fnstsw")
1781 .Case("fclex", "fnclex")
1783 assert(Repl && "Unknown wait-prefixed instruction");
1785 Operands[0] = X86Operand::CreateToken(Repl, IDLoc);
1788 bool WasOriginallyInvalidOperand = false;
1791 // First, try a direct match.
1792 switch (MatchInstructionImpl(Operands, Inst,
1793 ErrorInfo, MatchingInlineAsm,
1794 isParsingIntelSyntax())) {
1797 // Some instructions need post-processing to, for example, tweak which
1798 // encoding is selected. Loop on it while changes happen so the
1799 // individual transformations can chain off each other.
1800 if (!MatchingInlineAsm)
1801 while (processInstruction(Inst, Operands))
1805 if (!MatchingInlineAsm)
1806 Out.EmitInstruction(Inst);
1807 Opcode = Inst.getOpcode();
1809 case Match_MissingFeature: {
1810 assert(ErrorInfo && "Unknown missing feature!");
1811 // Special case the error message for the very common case where only
1812 // a single subtarget feature is missing.
1813 std::string Msg = "instruction requires:";
1815 for (unsigned i = 0; i < (sizeof(ErrorInfo)*8-1); ++i) {
1816 if (ErrorInfo & Mask) {
1818 Msg += getSubtargetFeatureName(ErrorInfo & Mask);
1822 return Error(IDLoc, Msg, EmptyRanges, MatchingInlineAsm);
1824 case Match_InvalidOperand:
1825 WasOriginallyInvalidOperand = true;
1827 case Match_MnemonicFail:
1831 // FIXME: Ideally, we would only attempt suffix matches for things which are
1832 // valid prefixes, and we could just infer the right unambiguous
1833 // type. However, that requires substantially more matcher support than the
1836 // Change the operand to point to a temporary token.
1837 StringRef Base = Op->getToken();
1838 SmallString<16> Tmp;
1841 Op->setTokenValue(Tmp.str());
1843 // If this instruction starts with an 'f', then it is a floating point stack
1844 // instruction. These come in up to three forms for 32-bit, 64-bit, and
1845 // 80-bit floating point, which use the suffixes s,l,t respectively.
1847 // Otherwise, we assume that this may be an integer instruction, which comes
1848 // in 8/16/32/64-bit forms using the b,w,l,q suffixes respectively.
1849 const char *Suffixes = Base[0] != 'f' ? "bwlq" : "slt\0";
1851 // Check for the various suffix matches.
1852 Tmp[Base.size()] = Suffixes[0];
1853 unsigned ErrorInfoIgnore;
1854 unsigned ErrorInfoMissingFeature;
1855 unsigned Match1, Match2, Match3, Match4;
1857 Match1 = MatchInstructionImpl(Operands, Inst, ErrorInfoIgnore,
1858 isParsingIntelSyntax());
1859 // If this returned as a missing feature failure, remember that.
1860 if (Match1 == Match_MissingFeature)
1861 ErrorInfoMissingFeature = ErrorInfoIgnore;
1862 Tmp[Base.size()] = Suffixes[1];
1863 Match2 = MatchInstructionImpl(Operands, Inst, ErrorInfoIgnore,
1864 isParsingIntelSyntax());
1865 // If this returned as a missing feature failure, remember that.
1866 if (Match2 == Match_MissingFeature)
1867 ErrorInfoMissingFeature = ErrorInfoIgnore;
1868 Tmp[Base.size()] = Suffixes[2];
1869 Match3 = MatchInstructionImpl(Operands, Inst, ErrorInfoIgnore,
1870 isParsingIntelSyntax());
1871 // If this returned as a missing feature failure, remember that.
1872 if (Match3 == Match_MissingFeature)
1873 ErrorInfoMissingFeature = ErrorInfoIgnore;
1874 Tmp[Base.size()] = Suffixes[3];
1875 Match4 = MatchInstructionImpl(Operands, Inst, ErrorInfoIgnore,
1876 isParsingIntelSyntax());
1877 // If this returned as a missing feature failure, remember that.
1878 if (Match4 == Match_MissingFeature)
1879 ErrorInfoMissingFeature = ErrorInfoIgnore;
1881 // Restore the old token.
1882 Op->setTokenValue(Base);
1884 // If exactly one matched, then we treat that as a successful match (and the
1885 // instruction will already have been filled in correctly, since the failing
1886 // matches won't have modified it).
1887 unsigned NumSuccessfulMatches =
1888 (Match1 == Match_Success) + (Match2 == Match_Success) +
1889 (Match3 == Match_Success) + (Match4 == Match_Success);
1890 if (NumSuccessfulMatches == 1) {
1892 if (!MatchingInlineAsm)
1893 Out.EmitInstruction(Inst);
1894 Opcode = Inst.getOpcode();
1898 // Otherwise, the match failed, try to produce a decent error message.
1900 // If we had multiple suffix matches, then identify this as an ambiguous
1902 if (NumSuccessfulMatches > 1) {
1904 unsigned NumMatches = 0;
1905 if (Match1 == Match_Success) MatchChars[NumMatches++] = Suffixes[0];
1906 if (Match2 == Match_Success) MatchChars[NumMatches++] = Suffixes[1];
1907 if (Match3 == Match_Success) MatchChars[NumMatches++] = Suffixes[2];
1908 if (Match4 == Match_Success) MatchChars[NumMatches++] = Suffixes[3];
1910 SmallString<126> Msg;
1911 raw_svector_ostream OS(Msg);
1912 OS << "ambiguous instructions require an explicit suffix (could be ";
1913 for (unsigned i = 0; i != NumMatches; ++i) {
1916 if (i + 1 == NumMatches)
1918 OS << "'" << Base << MatchChars[i] << "'";
1921 Error(IDLoc, OS.str(), EmptyRanges, MatchingInlineAsm);
1925 // Okay, we know that none of the variants matched successfully.
1927 // If all of the instructions reported an invalid mnemonic, then the original
1928 // mnemonic was invalid.
1929 if ((Match1 == Match_MnemonicFail) && (Match2 == Match_MnemonicFail) &&
1930 (Match3 == Match_MnemonicFail) && (Match4 == Match_MnemonicFail)) {
1931 if (!WasOriginallyInvalidOperand) {
1932 ArrayRef<SMRange> Ranges = MatchingInlineAsm ? EmptyRanges :
1934 return Error(IDLoc, "invalid instruction mnemonic '" + Base + "'",
1935 Ranges, MatchingInlineAsm);
1938 // Recover location info for the operand if we know which was the problem.
1939 if (ErrorInfo != ~0U) {
1940 if (ErrorInfo >= Operands.size())
1941 return Error(IDLoc, "too few operands for instruction",
1942 EmptyRanges, MatchingInlineAsm);
1944 X86Operand *Operand = (X86Operand*)Operands[ErrorInfo];
1945 if (Operand->getStartLoc().isValid()) {
1946 SMRange OperandRange = Operand->getLocRange();
1947 return Error(Operand->getStartLoc(), "invalid operand for instruction",
1948 OperandRange, MatchingInlineAsm);
1952 return Error(IDLoc, "invalid operand for instruction", EmptyRanges,
1956 // If one instruction matched with a missing feature, report this as a
1958 if ((Match1 == Match_MissingFeature) + (Match2 == Match_MissingFeature) +
1959 (Match3 == Match_MissingFeature) + (Match4 == Match_MissingFeature) == 1){
1960 std::string Msg = "instruction requires:";
1962 for (unsigned i = 0; i < (sizeof(ErrorInfoMissingFeature)*8-1); ++i) {
1963 if (ErrorInfoMissingFeature & Mask) {
1965 Msg += getSubtargetFeatureName(ErrorInfoMissingFeature & Mask);
1969 return Error(IDLoc, Msg, EmptyRanges, MatchingInlineAsm);
1972 // If one instruction matched with an invalid operand, report this as an
1974 if ((Match1 == Match_InvalidOperand) + (Match2 == Match_InvalidOperand) +
1975 (Match3 == Match_InvalidOperand) + (Match4 == Match_InvalidOperand) == 1){
1976 Error(IDLoc, "invalid operand for instruction", EmptyRanges,
1981 // If all of these were an outright failure, report it in a useless way.
1982 Error(IDLoc, "unknown use of instruction mnemonic without a size suffix",
1983 EmptyRanges, MatchingInlineAsm);
1988 bool X86AsmParser::ParseDirective(AsmToken DirectiveID) {
1989 StringRef IDVal = DirectiveID.getIdentifier();
1990 if (IDVal == ".word")
1991 return ParseDirectiveWord(2, DirectiveID.getLoc());
1992 else if (IDVal.startswith(".code"))
1993 return ParseDirectiveCode(IDVal, DirectiveID.getLoc());
1994 else if (IDVal.startswith(".att_syntax")) {
1995 getParser().setAssemblerDialect(0);
1997 } else if (IDVal.startswith(".intel_syntax")) {
1998 getParser().setAssemblerDialect(1);
1999 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2000 if(Parser.getTok().getString() == "noprefix") {
2001 // FIXME : Handle noprefix
2011 /// ParseDirectiveWord
2012 /// ::= .word [ expression (, expression)* ]
2013 bool X86AsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
2014 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2016 const MCExpr *Value;
2017 if (getParser().ParseExpression(Value))
2020 getParser().getStreamer().EmitValue(Value, Size, 0 /*addrspace*/);
2022 if (getLexer().is(AsmToken::EndOfStatement))
2025 // FIXME: Improve diagnostic.
2026 if (getLexer().isNot(AsmToken::Comma))
2027 return Error(L, "unexpected token in directive");
2036 /// ParseDirectiveCode
2037 /// ::= .code32 | .code64
2038 bool X86AsmParser::ParseDirectiveCode(StringRef IDVal, SMLoc L) {
2039 if (IDVal == ".code32") {
2041 if (is64BitMode()) {
2043 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code32);
2045 } else if (IDVal == ".code64") {
2047 if (!is64BitMode()) {
2049 getParser().getStreamer().EmitAssemblerFlag(MCAF_Code64);
2052 return Error(L, "unexpected directive " + IDVal);
2058 // Force static initialization.
2059 extern "C" void LLVMInitializeX86AsmParser() {
2060 RegisterMCAsmParser<X86AsmParser> X(TheX86_32Target);
2061 RegisterMCAsmParser<X86AsmParser> Y(TheX86_64Target);
2064 #define GET_REGISTER_MATCHER
2065 #define GET_MATCHER_IMPLEMENTATION
2066 #define GET_SUBTARGET_FEATURE_NAME
2067 #include "X86GenAsmMatcher.inc"