mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-02 11:30:10 +00:00
a simple mapping of register names to IDs to identify register tokens. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100685 91177308-0d34-0410-b5e6-96231b3b80d8
141 lines
3.7 KiB
C++
141 lines
3.7 KiB
C++
//===-- ARMAsmLexer.cpp - Tokenize ARM 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 "ARM.h"
|
|
#include "ARMTargetMachine.h"
|
|
|
|
#include "llvm/ADT/OwningPtr.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/MC/MCParser/MCAsmLexer.h"
|
|
#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
|
|
|
|
#include "llvm/Target/TargetAsmLexer.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/TargetRegistry.h"
|
|
|
|
#include <string>
|
|
#include <map>
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
class ARMBaseAsmLexer : public TargetAsmLexer {
|
|
const MCAsmInfo &AsmInfo;
|
|
|
|
const AsmToken &lexDefinite() {
|
|
return getLexer()->Lex();
|
|
}
|
|
|
|
AsmToken LexTokenUAL();
|
|
protected:
|
|
typedef std::map <std::string, unsigned> rmap_ty;
|
|
|
|
rmap_ty RegisterMap;
|
|
|
|
void InitRegisterMap(const TargetRegisterInfo *info) {
|
|
unsigned numRegs = info->getNumRegs();
|
|
|
|
for (unsigned i = 0; i < numRegs; ++i) {
|
|
const char *regName = info->getName(i);
|
|
if (regName)
|
|
RegisterMap[regName] = i;
|
|
}
|
|
}
|
|
|
|
unsigned MatchRegisterName(StringRef Name) {
|
|
rmap_ty::iterator iter = RegisterMap.find(Name.str());
|
|
if (iter != RegisterMap.end())
|
|
return iter->second;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
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 LexTokenUAL();
|
|
}
|
|
}
|
|
public:
|
|
ARMBaseAsmLexer(const Target &T, const MCAsmInfo &MAI)
|
|
: TargetAsmLexer(T), AsmInfo(MAI) {
|
|
}
|
|
};
|
|
|
|
class ARMAsmLexer : public ARMBaseAsmLexer {
|
|
public:
|
|
ARMAsmLexer(const Target &T, const MCAsmInfo &MAI)
|
|
: ARMBaseAsmLexer(T, MAI) {
|
|
std::string tripleString("arm-unknown-unknown");
|
|
std::string featureString;
|
|
OwningPtr<const TargetMachine>
|
|
targetMachine(T.createTargetMachine(tripleString, featureString));
|
|
InitRegisterMap(targetMachine->getRegisterInfo());
|
|
}
|
|
};
|
|
|
|
class ThumbAsmLexer : public ARMBaseAsmLexer {
|
|
public:
|
|
ThumbAsmLexer(const Target &T, const MCAsmInfo &MAI)
|
|
: ARMBaseAsmLexer(T, MAI) {
|
|
std::string tripleString("thumb-unknown-unknown");
|
|
std::string featureString;
|
|
OwningPtr<const TargetMachine>
|
|
targetMachine(T.createTargetMachine(tripleString, featureString));
|
|
InitRegisterMap(targetMachine->getRegisterInfo());
|
|
}
|
|
};
|
|
}
|
|
|
|
AsmToken ARMBaseAsmLexer::LexTokenUAL() {
|
|
const AsmToken &lexedToken = lexDefinite();
|
|
|
|
switch (lexedToken.getKind()) {
|
|
default:
|
|
return AsmToken(lexedToken);
|
|
case AsmToken::Error:
|
|
SetError(Lexer->getErrLoc(), Lexer->getErr());
|
|
return AsmToken(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));
|
|
} else {
|
|
return AsmToken(lexedToken);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
extern "C" void LLVMInitializeARMAsmLexer() {
|
|
RegisterAsmLexer<ARMAsmLexer> X(TheARMTarget);
|
|
RegisterAsmLexer<ThumbAsmLexer> Y(TheThumbTarget);
|
|
}
|
|
|