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 //===----------------------------------------------------------------------===//
11 #include "MBlazeTargetMachine.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 MBlazeBaseAsmLexer : 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 MBlazeBaseAsmLexer(const Target &T, const MCAsmInfo &MAI)
79 : TargetAsmLexer(T), AsmInfo(MAI) {
83 class MBlazeAsmLexer : public MBlazeBaseAsmLexer {
85 MBlazeAsmLexer(const Target &T, const MCAsmInfo &MAI)
86 : MBlazeBaseAsmLexer(T, MAI) {
87 std::string tripleString("mblaze-unknown-unknown");
88 std::string featureString;
90 OwningPtr<const TargetMachine>
91 targetMachine(T.createTargetMachine(tripleString, CPU, featureString));
92 InitRegisterMap(targetMachine->getRegisterInfo());
97 AsmToken MBlazeBaseAsmLexer::LexTokenUAL() {
98 const AsmToken &lexedToken = lexDefinite();
100 switch (lexedToken.getKind()) {
102 return AsmToken(lexedToken);
103 case AsmToken::Error:
104 SetError(Lexer->getErrLoc(), Lexer->getErr());
105 return AsmToken(lexedToken);
106 case AsmToken::Identifier:
108 std::string upperCase = lexedToken.getString().str();
109 std::string lowerCase = LowercaseString(upperCase);
110 StringRef lowerRef(lowerCase);
112 unsigned regID = MatchRegisterName(lowerRef);
115 return AsmToken(AsmToken::Register,
116 lexedToken.getString(),
117 static_cast<int64_t>(regID));
119 return AsmToken(lexedToken);
125 extern "C" void LLVMInitializeMBlazeAsmLexer() {
126 RegisterAsmLexer<MBlazeAsmLexer> X(TheMBlazeTarget);