mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-20 09:30:43 +00:00
4da992aeba
mostly based on the ARM AsmParser at this time and is not particularly
functional.
Changed the MBlaze data layout from:
"E-p:32:32-i8:8:8-i16:16:16-i64:32:32-f64:32:32-v64:32:32-v128:32:32-n32"
to:
"E-p:32:32:32-i8:8:8-i16:16:16"
because the MicroBlaze doesn't have i64, f64, v64, or v128 data types.
Cleaned up the MBlaze source code:
1. The floating point register class has been removed. The
MicroBlaze does not have floating point registers. Floating
point values are simply stored in integer registers.
2. Renaming the CPURegs register class to GPR to reflect the
standard naming.
3. Removing a lot of stale code from AsmPrinter after
the conversion to InstPrinter.
4. Simplified sign extended loads by marking them as
expanded in ISelLowering.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117054 91177308-0d34-0410-b5e6-96231b3b80d8
128 lines
3.3 KiB
C++
128 lines
3.3 KiB
C++
//===-- MBlazeAsmLexer.cpp - Tokenize MBlaze assembly to AsmTokens --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "MBlaze.h"
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#include "MBlazeTargetMachine.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCParser/MCAsmLexer.h"
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#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
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#include "llvm/Target/TargetAsmLexer.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetRegistry.h"
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#include <string>
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#include <map>
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using namespace llvm;
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namespace {
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class MBlazeBaseAsmLexer : public TargetAsmLexer {
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const MCAsmInfo &AsmInfo;
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const AsmToken &lexDefinite() {
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return getLexer()->Lex();
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}
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AsmToken LexTokenUAL();
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protected:
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typedef std::map <std::string, unsigned> rmap_ty;
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rmap_ty RegisterMap;
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void InitRegisterMap(const TargetRegisterInfo *info) {
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unsigned numRegs = info->getNumRegs();
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for (unsigned i = 0; i < numRegs; ++i) {
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const char *regName = info->getName(i);
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if (regName)
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RegisterMap[regName] = i;
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}
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}
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unsigned MatchRegisterName(StringRef Name) {
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rmap_ty::iterator iter = RegisterMap.find(Name.str());
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if (iter != RegisterMap.end())
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return iter->second;
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else
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return 0;
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}
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AsmToken LexToken() {
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if (!Lexer) {
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SetError(SMLoc(), "No MCAsmLexer installed");
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return AsmToken(AsmToken::Error, "", 0);
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}
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switch (AsmInfo.getAssemblerDialect()) {
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default:
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SetError(SMLoc(), "Unhandled dialect");
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return AsmToken(AsmToken::Error, "", 0);
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case 0:
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return LexTokenUAL();
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}
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}
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public:
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MBlazeBaseAsmLexer(const Target &T, const MCAsmInfo &MAI)
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: TargetAsmLexer(T), AsmInfo(MAI) {
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}
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};
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class MBlazeAsmLexer : public MBlazeBaseAsmLexer {
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public:
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MBlazeAsmLexer(const Target &T, const MCAsmInfo &MAI)
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: MBlazeBaseAsmLexer(T, MAI) {
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std::string tripleString("mblaze-unknown-unknown");
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std::string featureString;
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OwningPtr<const TargetMachine>
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targetMachine(T.createTargetMachine(tripleString, featureString));
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InitRegisterMap(targetMachine->getRegisterInfo());
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}
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};
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}
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AsmToken MBlazeBaseAsmLexer::LexTokenUAL() {
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const AsmToken &lexedToken = lexDefinite();
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switch (lexedToken.getKind()) {
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default:
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return AsmToken(lexedToken);
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case AsmToken::Error:
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SetError(Lexer->getErrLoc(), Lexer->getErr());
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return AsmToken(lexedToken);
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case AsmToken::Identifier:
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{
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std::string upperCase = lexedToken.getString().str();
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std::string lowerCase = LowercaseString(upperCase);
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StringRef lowerRef(lowerCase);
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unsigned regID = MatchRegisterName(lowerRef);
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if (regID) {
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return AsmToken(AsmToken::Register,
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lexedToken.getString(),
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static_cast<int64_t>(regID));
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} else {
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return AsmToken(lexedToken);
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}
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}
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}
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}
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extern "C" void LLVMInitializeMBlazeAsmLexer() {
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RegisterAsmLexer<MBlazeAsmLexer> X(TheMBlazeTarget);
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}
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