1 //===-- X86AsmLexer.cpp - Tokenize X86 assembly to AsmTokens --------------===//
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 "llvm/ADT/SmallVector.h"
11 #include "llvm/Target/TargetAsmLexer.h"
12 #include "llvm/Target/TargetRegistry.h"
13 #include "llvm/MC/MCAsmInfo.h"
14 #include "llvm/MC/MCParser/MCAsmLexer.h"
15 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
22 class X86AsmLexer : public TargetAsmLexer {
23 const MCAsmInfo &AsmInfo;
26 bool tentativeIsValid;
27 AsmToken tentativeToken;
29 const AsmToken &lexTentative() {
30 tentativeToken = Lexer->Lex();
31 tentativeIsValid = true;
32 return tentativeToken;
35 const AsmToken &lexDefinite() {
36 if(tentativeIsValid) {
37 tentativeIsValid = false;
38 return tentativeToken;
45 AsmToken LexTokenATT();
46 AsmToken LexTokenIntel();
50 SetError(SMLoc(), "No MCAsmLexer installed");
51 return AsmToken(AsmToken::Error, "", 0);
54 switch (AsmInfo.getAssemblerDialect()) {
56 SetError(SMLoc(), "Unhandled dialect");
57 return AsmToken(AsmToken::Error, "", 0);
61 return LexTokenIntel();
65 X86AsmLexer(const Target &T, const MCAsmInfo &MAI)
66 : TargetAsmLexer(T), AsmInfo(MAI), Lexer(NULL), tentativeIsValid(false) {
69 void InstallLexer(MCAsmLexer &L) {
76 static unsigned MatchRegisterName(const StringRef &Name);
78 AsmToken X86AsmLexer::LexTokenATT() {
79 const AsmToken &lexedToken = lexDefinite();
81 switch (lexedToken.getKind()) {
83 return AsmToken(lexedToken);
85 SetError(Lexer->getErrLoc(), Lexer->getErr());
86 return AsmToken(lexedToken);
87 case AsmToken::Percent:
89 const AsmToken &nextToken = lexTentative();
90 if (nextToken.getKind() == AsmToken::Identifier) {
91 unsigned regID = MatchRegisterName(nextToken.getString());
96 StringRef regStr(lexedToken.getString().data(),
97 lexedToken.getString().size() +
98 nextToken.getString().size());
100 return AsmToken(AsmToken::Register,
102 static_cast<int64_t>(regID));
105 return AsmToken(lexedToken);
109 return AsmToken(lexedToken);
115 AsmToken X86AsmLexer::LexTokenIntel() {
116 return AsmToken(AsmToken::Error, "", 0);
119 extern "C" void LLVMInitializeX86AsmLexer() {
120 RegisterAsmLexer<X86AsmLexer> X(TheX86_32Target);
121 RegisterAsmLexer<X86AsmLexer> Y(TheX86_64Target);
124 #define REGISTERS_ONLY
125 #include "../X86GenAsmMatcher.inc"
126 #undef REGISTERS_ONLY