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/Support/TargetRegistry.h"
20 #include "llvm/ADT/StringSwitch.h"
29 class ARMBaseAsmLexer : public MCTargetAsmLexer {
30 const MCAsmInfo &AsmInfo;
32 const AsmToken &lexDefinite() {
33 return getLexer()->Lex();
36 AsmToken LexTokenUAL();
38 typedef std::map <std::string, unsigned> rmap_ty;
42 void InitRegisterMap(const MCRegisterInfo *info) {
43 unsigned numRegs = info->getNumRegs();
45 for (unsigned i = 0; i < numRegs; ++i) {
46 const char *regName = info->getName(i);
48 RegisterMap[regName] = i;
52 unsigned MatchRegisterName(StringRef Name) {
53 rmap_ty::iterator iter = RegisterMap.find(Name.str());
54 if (iter != RegisterMap.end())
62 SetError(SMLoc(), "No MCAsmLexer installed");
63 return AsmToken(AsmToken::Error, "", 0);
66 switch (AsmInfo.getAssemblerDialect()) {
68 SetError(SMLoc(), "Unhandled dialect");
69 return AsmToken(AsmToken::Error, "", 0);
75 ARMBaseAsmLexer(const Target &T, const MCAsmInfo &MAI)
76 : MCTargetAsmLexer(T), AsmInfo(MAI) {
80 class ARMAsmLexer : public ARMBaseAsmLexer {
82 ARMAsmLexer(const Target &T, const MCRegisterInfo &MRI, const MCAsmInfo &MAI)
83 : ARMBaseAsmLexer(T, MAI) {
84 InitRegisterMap(&MRI);
88 class ThumbAsmLexer : public ARMBaseAsmLexer {
90 ThumbAsmLexer(const Target &T, const MCRegisterInfo &MRI,const MCAsmInfo &MAI)
91 : ARMBaseAsmLexer(T, MAI) {
92 InitRegisterMap(&MRI);
96 } // end anonymous namespace
98 AsmToken ARMBaseAsmLexer::LexTokenUAL() {
99 const AsmToken &lexedToken = lexDefinite();
101 switch (lexedToken.getKind()) {
103 case AsmToken::Error:
104 SetError(Lexer->getErrLoc(), Lexer->getErr());
106 case AsmToken::Identifier: {
107 std::string lowerCase = lexedToken.getString().lower();
109 unsigned regID = MatchRegisterName(lowerCase);
110 // Check for register aliases.
115 // FIXME: Some assemblers support lots of others. Do we want them all?
117 regID = StringSwitch<unsigned>(lowerCase)
118 .Case("r13", ARM::SP)
119 .Case("r14", ARM::LR)
120 .Case("r15", ARM::PC)
121 .Case("ip", ARM::R12)
126 return AsmToken(AsmToken::Register,
127 lexedToken.getString(),
128 static_cast<int64_t>(regID));
132 return AsmToken(lexedToken);
135 extern "C" void LLVMInitializeARMAsmLexer() {
136 RegisterMCAsmLexer<ARMAsmLexer> X(TheARMTarget);
137 RegisterMCAsmLexer<ThumbAsmLexer> Y(TheThumbTarget);