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"
11 #include "llvm/ADT/StringSwitch.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"
17 #include "llvm/Support/TargetRegistry.h"
25 class ARMBaseAsmLexer : public MCTargetAsmLexer {
26 const MCAsmInfo &AsmInfo;
28 const AsmToken &lexDefinite() {
29 return getLexer()->Lex();
32 AsmToken LexTokenUAL();
34 typedef std::map <std::string, unsigned> rmap_ty;
38 void InitRegisterMap(const MCRegisterInfo *info) {
39 unsigned numRegs = info->getNumRegs();
41 for (unsigned i = 0; i < numRegs; ++i) {
42 const char *regName = info->getName(i);
44 RegisterMap[regName] = i;
48 unsigned MatchRegisterName(StringRef Name) {
49 rmap_ty::iterator iter = RegisterMap.find(Name.str());
50 if (iter != RegisterMap.end())
58 SetError(SMLoc(), "No MCAsmLexer installed");
59 return AsmToken(AsmToken::Error, "", 0);
62 switch (AsmInfo.getAssemblerDialect()) {
64 SetError(SMLoc(), "Unhandled dialect");
65 return AsmToken(AsmToken::Error, "", 0);
71 ARMBaseAsmLexer(const Target &T, const MCAsmInfo &MAI)
72 : MCTargetAsmLexer(T), AsmInfo(MAI) {
76 class ARMAsmLexer : public ARMBaseAsmLexer {
78 ARMAsmLexer(const Target &T, const MCRegisterInfo &MRI, const MCAsmInfo &MAI)
79 : ARMBaseAsmLexer(T, MAI) {
80 InitRegisterMap(&MRI);
84 class ThumbAsmLexer : public ARMBaseAsmLexer {
86 ThumbAsmLexer(const Target &T, const MCRegisterInfo &MRI,const MCAsmInfo &MAI)
87 : ARMBaseAsmLexer(T, MAI) {
88 InitRegisterMap(&MRI);
92 } // end anonymous namespace
94 AsmToken ARMBaseAsmLexer::LexTokenUAL() {
95 const AsmToken &lexedToken = lexDefinite();
97 switch (lexedToken.getKind()) {
100 SetError(Lexer->getErrLoc(), Lexer->getErr());
102 case AsmToken::Identifier: {
103 std::string lowerCase = lexedToken.getString().lower();
105 unsigned regID = MatchRegisterName(lowerCase);
106 // Check for register aliases.
111 // FIXME: Some assemblers support lots of others. Do we want them all?
113 regID = StringSwitch<unsigned>(lowerCase)
114 .Case("r13", ARM::SP)
115 .Case("r14", ARM::LR)
116 .Case("r15", ARM::PC)
117 .Case("ip", ARM::R12)
122 return AsmToken(AsmToken::Register,
123 lexedToken.getString(),
124 static_cast<int64_t>(regID));
128 return AsmToken(lexedToken);
131 extern "C" void LLVMInitializeARMAsmLexer() {
132 RegisterMCAsmLexer<ARMAsmLexer> X(TheARMTarget);
133 RegisterMCAsmLexer<ThumbAsmLexer> Y(TheThumbTarget);