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 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/ARMBaseInfo.h"
12 #include "llvm/MC/MCAsmInfo.h"
13 #include "llvm/MC/MCParser/MCAsmLexer.h"
14 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
15 #include "llvm/MC/MCRegisterInfo.h"
16 #include "llvm/MC/MCTargetAsmLexer.h"
18 #include "llvm/Target/TargetRegistry.h"
20 #include "llvm/ADT/OwningPtr.h"
21 #include "llvm/ADT/SmallVector.h"
22 #include "llvm/ADT/StringExtras.h"
23 #include "llvm/ADT/StringSwitch.h"
32 class ARMBaseAsmLexer : public MCTargetAsmLexer {
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 MCRegisterInfo *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 : MCTargetAsmLexer(T), AsmInfo(MAI) {
83 class ARMAsmLexer : public ARMBaseAsmLexer {
85 ARMAsmLexer(const Target &T, const MCRegisterInfo &MRI, const MCAsmInfo &MAI)
86 : ARMBaseAsmLexer(T, MAI) {
87 InitRegisterMap(&MRI);
91 class ThumbAsmLexer : public ARMBaseAsmLexer {
93 ThumbAsmLexer(const Target &T, const MCRegisterInfo &MRI,const MCAsmInfo &MAI)
94 : ARMBaseAsmLexer(T, MAI) {
95 InitRegisterMap(&MRI);
99 } // end anonymous namespace
101 AsmToken ARMBaseAsmLexer::LexTokenUAL() {
102 const AsmToken &lexedToken = lexDefinite();
104 switch (lexedToken.getKind()) {
106 case AsmToken::Error:
107 SetError(Lexer->getErrLoc(), Lexer->getErr());
109 case AsmToken::Identifier: {
110 std::string upperCase = lexedToken.getString().str();
111 std::string lowerCase = LowercaseString(upperCase);
112 StringRef lowerRef(lowerCase);
114 unsigned regID = MatchRegisterName(lowerRef);
115 // Check for register aliases.
120 // FIXME: Some assemblers support lots of others. Do we want them all?
122 regID = StringSwitch<unsigned>(lowerCase)
123 .Case("r13", ARM::SP)
124 .Case("r14", ARM::LR)
125 .Case("r15", ARM::PC)
126 .Case("ip", ARM::R12)
131 return AsmToken(AsmToken::Register,
132 lexedToken.getString(),
133 static_cast<int64_t>(regID));
137 return AsmToken(lexedToken);
140 extern "C" void LLVMInitializeARMAsmLexer() {
141 RegisterMCAsmLexer<ARMAsmLexer> X(TheARMTarget);
142 RegisterMCAsmLexer<ThumbAsmLexer> Y(TheThumbTarget);