1 //===-- ARMAsmLexer.cpp - Tokenize ARM 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 //===----------------------------------------------------------------------===//
11 #include "ARMTargetMachine.h"
13 #include "llvm/ADT/OwningPtr.h"
14 #include "llvm/ADT/SmallVector.h"
15 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/MC/MCAsmInfo.h"
18 #include "llvm/MC/MCParser/MCAsmLexer.h"
19 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
21 #include "llvm/Target/TargetAsmLexer.h"
22 #include "llvm/Target/TargetMachine.h"
23 #include "llvm/Target/TargetRegistry.h"
32 class ARMBaseAsmLexer : public TargetAsmLexer {
33 const MCAsmInfo &AsmInfo;
35 const AsmToken &lexDefinite() {
36 return getLexer()->Lex();
39 AsmToken LexTokenUAL();
41 typedef std::map <std::string, unsigned> rmap_ty;
45 void InitRegisterMap(const TargetRegisterInfo *info) {
46 unsigned numRegs = info->getNumRegs();
48 for (unsigned i = 0; i < numRegs; ++i) {
49 const char *regName = info->getName(i);
51 RegisterMap[regName] = i;
55 unsigned MatchRegisterName(StringRef Name) {
56 rmap_ty::iterator iter = RegisterMap.find(Name.str());
57 if (iter != RegisterMap.end())
65 SetError(SMLoc(), "No MCAsmLexer installed");
66 return AsmToken(AsmToken::Error, "", 0);
69 switch (AsmInfo.getAssemblerDialect()) {
71 SetError(SMLoc(), "Unhandled dialect");
72 return AsmToken(AsmToken::Error, "", 0);
78 ARMBaseAsmLexer(const Target &T, const MCAsmInfo &MAI)
79 : TargetAsmLexer(T), AsmInfo(MAI) {
83 class ARMAsmLexer : public ARMBaseAsmLexer {
85 ARMAsmLexer(const Target &T, const MCAsmInfo &MAI)
86 : ARMBaseAsmLexer(T, MAI) {
87 std::string tripleString("arm-unknown-unknown");
88 std::string featureString;
89 OwningPtr<const TargetMachine>
90 targetMachine(T.createTargetMachine(tripleString, featureString));
91 InitRegisterMap(targetMachine->getRegisterInfo());
95 class ThumbAsmLexer : public ARMBaseAsmLexer {
97 ThumbAsmLexer(const Target &T, const MCAsmInfo &MAI)
98 : ARMBaseAsmLexer(T, MAI) {
99 std::string tripleString("thumb-unknown-unknown");
100 std::string featureString;
101 OwningPtr<const TargetMachine>
102 targetMachine(T.createTargetMachine(tripleString, featureString));
103 InitRegisterMap(targetMachine->getRegisterInfo());
108 AsmToken ARMBaseAsmLexer::LexTokenUAL() {
109 const AsmToken &lexedToken = lexDefinite();
111 switch (lexedToken.getKind()) {
113 return AsmToken(lexedToken);
114 case AsmToken::Error:
115 SetError(Lexer->getErrLoc(), Lexer->getErr());
116 return AsmToken(lexedToken);
117 case AsmToken::Identifier:
119 std::string upperCase = lexedToken.getString().str();
120 std::string lowerCase = LowercaseString(upperCase);
121 StringRef lowerRef(lowerCase);
123 unsigned regID = MatchRegisterName(lowerRef);
126 return AsmToken(AsmToken::Register,
127 lexedToken.getString(),
128 static_cast<int64_t>(regID));
130 return AsmToken(lexedToken);
136 extern "C" void LLVMInitializeARMAsmLexer() {
137 RegisterAsmLexer<ARMAsmLexer> X(TheARMTarget);
138 RegisterAsmLexer<ThumbAsmLexer> Y(TheThumbTarget);