1 files changed, 165 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/X86/AsmParser/X86AsmLexer.cpp b/contrib/llvm/lib/Target/X86/AsmParser/X86AsmLexer.cpp
new file mode 100644
index 0000000..1eaccff
--- /dev/null
+++ b/contrib/llvm/lib/Target/X86/AsmParser/X86AsmLexer.cpp
@@ -0,0 +1,165 @@
+//===-- X86AsmLexer.cpp - Tokenize X86 assembly to AsmTokens --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MCTargetDesc/X86BaseInfo.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
+#include "llvm/MC/MCTargetAsmLexer.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
+
+using namespace llvm;
+
+namespace {
+  
+class X86AsmLexer : public MCTargetAsmLexer {
+  const MCAsmInfo &AsmInfo;
+  
+  bool tentativeIsValid;
+  AsmToken tentativeToken;
+  
+  const AsmToken &lexTentative() {
+    tentativeToken = getLexer()->Lex();
+    tentativeIsValid = true;
+    return tentativeToken;
+  }
+  
+  const AsmToken &lexDefinite() {
+    if (tentativeIsValid) {
+      tentativeIsValid = false;
+      return tentativeToken;
+    }
+    return getLexer()->Lex();
+  }
+  
+  AsmToken LexTokenATT();
+  AsmToken LexTokenIntel();
+protected:
+  AsmToken LexToken() {
+    if (!Lexer) {
+      SetError(SMLoc(), "No MCAsmLexer installed");
+      return AsmToken(AsmToken::Error, "", 0);
+    }
+    
+    switch (AsmInfo.getAssemblerDialect()) {
+    default:
+      SetError(SMLoc(), "Unhandled dialect");
+      return AsmToken(AsmToken::Error, "", 0);
+    case 0:
+      return LexTokenATT();
+    case 1:
+      return LexTokenIntel();
+    }
+  }
+public:
+  X86AsmLexer(const Target &T, const MCRegisterInfo &MRI, const MCAsmInfo &MAI)
+    : MCTargetAsmLexer(T), AsmInfo(MAI), tentativeIsValid(false) {
+  }
+};
+
+} // end anonymous namespace
+
+#define GET_REGISTER_MATCHER
+#include "X86GenAsmMatcher.inc"
+
+AsmToken X86AsmLexer::LexTokenATT() {
+  AsmToken lexedToken = lexDefinite();
+  
+  switch (lexedToken.getKind()) {
+  default:
+    return lexedToken;
+  case AsmToken::Error:
+    SetError(Lexer->getErrLoc(), Lexer->getErr());
+    return lexedToken;
+      
+  case AsmToken::Percent: {
+    const AsmToken &nextToken = lexTentative();
+    if (nextToken.getKind() != AsmToken::Identifier)
+      return lexedToken;
+
+      
+    if (unsigned regID = MatchRegisterName(nextToken.getString())) {
+      lexDefinite();
+        
+      // FIXME: This is completely wrong when there is a space or other
+      // punctuation between the % and the register name.
+      StringRef regStr(lexedToken.getString().data(),
+                       lexedToken.getString().size() + 
+                       nextToken.getString().size());
+      
+      return AsmToken(AsmToken::Register, regStr, 
+                      static_cast<int64_t>(regID));
+    }
+    
+    // Match register name failed.  If this is "db[0-7]", match it as an alias
+    // for dr[0-7].
+    if (nextToken.getString().size() == 3 &&
+        nextToken.getString().startswith("db")) {
+      int RegNo = -1;
+      switch (nextToken.getString()[2]) {
+      case '0': RegNo = X86::DR0; break;
+      case '1': RegNo = X86::DR1; break;
+      case '2': RegNo = X86::DR2; break;
+      case '3': RegNo = X86::DR3; break;
+      case '4': RegNo = X86::DR4; break;
+      case '5': RegNo = X86::DR5; break;
+      case '6': RegNo = X86::DR6; break;
+      case '7': RegNo = X86::DR7; break;
+      }
+      
+      if (RegNo != -1) {
+        lexDefinite();
+
+        // FIXME: This is completely wrong when there is a space or other
+        // punctuation between the % and the register name.
+        StringRef regStr(lexedToken.getString().data(),
+                         lexedToken.getString().size() + 
+                         nextToken.getString().size());
+        return AsmToken(AsmToken::Register, regStr, 
+                        static_cast<int64_t>(RegNo));
+      }
+    }
+      
+   
+    return lexedToken;
+  }    
+  }
+}
+
+AsmToken X86AsmLexer::LexTokenIntel() {
+  const AsmToken &lexedToken = lexDefinite();
+  
+  switch(lexedToken.getKind()) {
+  default:
+    return lexedToken;
+  case AsmToken::Error:
+    SetError(Lexer->getErrLoc(), Lexer->getErr());
+    return lexedToken;
+  case AsmToken::Identifier: {
+    std::string upperCase = lexedToken.getString().str();
+    std::string lowerCase = LowercaseString(upperCase);
+    StringRef lowerRef(lowerCase);
+    
+    unsigned regID = MatchRegisterName(lowerRef);
+    
+    if (regID)
+      return AsmToken(AsmToken::Register,
+                      lexedToken.getString(),
+                      static_cast<int64_t>(regID));
+    return lexedToken;
+  }
+  }
+}
+
+extern "C" void LLVMInitializeX86AsmLexer() {
+  RegisterMCAsmLexer<X86AsmLexer> X(TheX86_32Target);
+  RegisterMCAsmLexer<X86AsmLexer> Y(TheX86_64Target);
+}