137 lines
4.5 KiB
C++
137 lines
4.5 KiB
C++
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//===-- M68kMCTargetDesc.cpp - M68k Target Descriptions ---------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file provides M68k target specific descriptions.
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///
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//===----------------------------------------------------------------------===//
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#include "M68kMCTargetDesc.h"
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#include "M68kInstPrinter.h"
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#include "M68kMCAsmInfo.h"
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#include "TargetInfo/M68kTargetInfo.h"
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#include "llvm/MC/MCELFStreamer.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MachineLocation.h"
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#include "llvm/MC/TargetRegistry.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FormattedStream.h"
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using namespace llvm;
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#define GET_INSTRINFO_MC_DESC
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#define ENABLE_INSTR_PREDICATE_VERIFIER
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#include "M68kGenInstrInfo.inc"
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#define GET_SUBTARGETINFO_MC_DESC
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#include "M68kGenSubtargetInfo.inc"
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#define GET_REGINFO_MC_DESC
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#include "M68kGenRegisterInfo.inc"
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// TODO Implement feature set parsing logics
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static std::string ParseM68kTriple(const Triple &TT, StringRef CPU) {
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return "";
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}
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static MCInstrInfo *createM68kMCInstrInfo() {
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MCInstrInfo *X = new MCInstrInfo();
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InitM68kMCInstrInfo(X); // defined in M68kGenInstrInfo.inc
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return X;
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}
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static MCRegisterInfo *createM68kMCRegisterInfo(const Triple &TT) {
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MCRegisterInfo *X = new MCRegisterInfo();
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InitM68kMCRegisterInfo(X, llvm::M68k::A0, 0, 0, llvm::M68k::PC);
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return X;
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}
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static MCSubtargetInfo *createM68kMCSubtargetInfo(const Triple &TT,
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StringRef CPU, StringRef FS) {
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std::string ArchFS = ParseM68kTriple(TT, CPU);
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if (!FS.empty()) {
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if (!ArchFS.empty()) {
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ArchFS = (ArchFS + "," + FS).str();
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} else {
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ArchFS = FS.str();
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}
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}
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return createM68kMCSubtargetInfoImpl(TT, CPU, /*TuneCPU=*/CPU, ArchFS);
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}
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static MCAsmInfo *createM68kMCAsmInfo(const MCRegisterInfo &MRI,
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const Triple &TT,
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const MCTargetOptions &TO) {
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MCAsmInfo *MAI = new M68kELFMCAsmInfo(TT);
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// Initialize initial frame state.
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// Calculate amount of bytes used for return address storing
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int StackGrowth = -4;
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// Initial state of the frame pointer is SP+StackGrowth.
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// TODO: Add tests for `cfi_*` directives
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MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(
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nullptr, MRI.getDwarfRegNum(llvm::M68k::SP, true), -StackGrowth);
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MAI->addInitialFrameState(Inst);
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// Add return address to move list
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Inst = MCCFIInstruction::createOffset(
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nullptr, MRI.getDwarfRegNum(M68k::PC, true), StackGrowth);
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MAI->addInitialFrameState(Inst);
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return MAI;
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}
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static MCRelocationInfo *createM68kMCRelocationInfo(const Triple &TheTriple,
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MCContext &Ctx) {
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// Default to the stock relocation info.
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return llvm::createMCRelocationInfo(TheTriple, Ctx);
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}
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static MCInstPrinter *createM68kMCInstPrinter(const Triple &T,
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unsigned SyntaxVariant,
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const MCAsmInfo &MAI,
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const MCInstrInfo &MII,
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const MCRegisterInfo &MRI) {
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return new M68kInstPrinter(MAI, MII, MRI);
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}
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extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeM68kTargetMC() {
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Target &T = getTheM68kTarget();
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// Register the MC asm info.
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RegisterMCAsmInfoFn X(T, createM68kMCAsmInfo);
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// Register the MC instruction info.
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TargetRegistry::RegisterMCInstrInfo(T, createM68kMCInstrInfo);
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// Register the MC register info.
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TargetRegistry::RegisterMCRegInfo(T, createM68kMCRegisterInfo);
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// Register the MC subtarget info.
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TargetRegistry::RegisterMCSubtargetInfo(T, createM68kMCSubtargetInfo);
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// Register the code emitter.
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TargetRegistry::RegisterMCCodeEmitter(T, createM68kMCCodeEmitter);
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// Register the MCInstPrinter.
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TargetRegistry::RegisterMCInstPrinter(T, createM68kMCInstPrinter);
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// Register the MC relocation info.
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TargetRegistry::RegisterMCRelocationInfo(T, createM68kMCRelocationInfo);
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// Register the asm backend.
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TargetRegistry::RegisterMCAsmBackend(T, createM68kAsmBackend);
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}
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