1 //===-- MBlazeAsmLexer.cpp - Tokenize MBlaze 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/MBlazeBaseInfo.h"
12 #include "llvm/ADT/OwningPtr.h"
13 #include "llvm/ADT/SmallVector.h"
14 #include "llvm/ADT/StringExtras.h"
16 #include "llvm/MC/MCAsmInfo.h"
17 #include "llvm/MC/MCParser/MCAsmLexer.h"
18 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
19 #include "llvm/MC/MCRegisterInfo.h"
20 #include "llvm/MC/MCTargetAsmLexer.h"
22 #include "llvm/Target/TargetRegistry.h"
31 class MBlazeBaseAsmLexer : public MCTargetAsmLexer {
32 const MCAsmInfo &AsmInfo;
34 const AsmToken &lexDefinite() {
35 return getLexer()->Lex();
38 AsmToken LexTokenUAL();
40 typedef std::map <std::string, unsigned> rmap_ty;
44 void InitRegisterMap(const MCRegisterInfo *info) {
45 unsigned numRegs = info->getNumRegs();
47 for (unsigned i = 0; i < numRegs; ++i) {
48 const char *regName = info->getName(i);
50 RegisterMap[regName] = i;
54 unsigned MatchRegisterName(StringRef Name) {
55 rmap_ty::iterator iter = RegisterMap.find(Name.str());
56 if (iter != RegisterMap.end())
64 SetError(SMLoc(), "No MCAsmLexer installed");
65 return AsmToken(AsmToken::Error, "", 0);
68 switch (AsmInfo.getAssemblerDialect()) {
70 SetError(SMLoc(), "Unhandled dialect");
71 return AsmToken(AsmToken::Error, "", 0);
77 MBlazeBaseAsmLexer(const Target &T, const MCAsmInfo &MAI)
78 : MCTargetAsmLexer(T), AsmInfo(MAI) {
82 class MBlazeAsmLexer : public MBlazeBaseAsmLexer {
84 MBlazeAsmLexer(const Target &T, const MCRegisterInfo &MRI,
86 : MBlazeBaseAsmLexer(T, MAI) {
87 InitRegisterMap(&MRI);
92 AsmToken MBlazeBaseAsmLexer::LexTokenUAL() {
93 const AsmToken &lexedToken = lexDefinite();
95 switch (lexedToken.getKind()) {
97 return AsmToken(lexedToken);
99 SetError(Lexer->getErrLoc(), Lexer->getErr());
100 return AsmToken(lexedToken);
101 case AsmToken::Identifier:
103 std::string upperCase = lexedToken.getString().str();
104 std::string lowerCase = LowercaseString(upperCase);
105 StringRef lowerRef(lowerCase);
107 unsigned regID = MatchRegisterName(lowerRef);
110 return AsmToken(AsmToken::Register,
111 lexedToken.getString(),
112 static_cast<int64_t>(regID));
114 return AsmToken(lexedToken);
120 extern "C" void LLVMInitializeMBlazeAsmLexer() {
121 RegisterMCAsmLexer<MBlazeAsmLexer> X(TheMBlazeTarget);