1 //===-- M68kMCTargetDesc.cpp - M68k Target Descriptions -----*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// 9 /// \file 10 /// This file provides M68k target specific descriptions. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #include "M68kMCTargetDesc.h" 15 #include "M68kInstPrinter.h" 16 #include "M68kMCAsmInfo.h" 17 #include "TargetInfo/M68kTargetInfo.h" 18 19 #include "llvm/MC/MCELFStreamer.h" 20 #include "llvm/MC/MCInstPrinter.h" 21 #include "llvm/MC/MCInstrInfo.h" 22 #include "llvm/MC/MCRegisterInfo.h" 23 #include "llvm/MC/MCSubtargetInfo.h" 24 #include "llvm/MC/MCSymbol.h" 25 #include "llvm/MC/MachineLocation.h" 26 #include "llvm/Support/CommandLine.h" 27 #include "llvm/Support/ErrorHandling.h" 28 #include "llvm/Support/FormattedStream.h" 29 #include "llvm/Support/TargetRegistry.h" 30 31 using namespace llvm; 32 33 #define GET_INSTRINFO_MC_DESC 34 #include "M68kGenInstrInfo.inc" 35 36 #define GET_SUBTARGETINFO_MC_DESC 37 #include "M68kGenSubtargetInfo.inc" 38 39 #define GET_REGINFO_MC_DESC 40 #include "M68kGenRegisterInfo.inc" 41 42 // TODO Implement feature set parsing logics 43 static std::string ParseM68kTriple(const Triple &TT, StringRef CPU) { 44 return ""; 45 } 46 47 static MCInstrInfo *createM68kMCInstrInfo() { 48 MCInstrInfo *X = new MCInstrInfo(); 49 InitM68kMCInstrInfo(X); // defined in M68kGenInstrInfo.inc 50 return X; 51 } 52 53 static MCRegisterInfo *createM68kMCRegisterInfo(const Triple &TT) { 54 MCRegisterInfo *X = new MCRegisterInfo(); 55 InitM68kMCRegisterInfo(X, llvm::M68k::A0, 0, 0, llvm::M68k::PC); 56 return X; 57 } 58 59 static MCSubtargetInfo *createM68kMCSubtargetInfo(const Triple &TT, 60 StringRef CPU, StringRef FS) { 61 std::string ArchFS = ParseM68kTriple(TT, CPU); 62 if (!FS.empty()) { 63 if (!ArchFS.empty()) { 64 ArchFS = (ArchFS + "," + FS).str(); 65 } else { 66 ArchFS = FS.str(); 67 } 68 } 69 return createM68kMCSubtargetInfoImpl(TT, CPU, /*TuneCPU=*/CPU, ArchFS); 70 } 71 72 static MCAsmInfo *createM68kMCAsmInfo(const MCRegisterInfo &MRI, 73 const Triple &TT, 74 const MCTargetOptions &TO) { 75 MCAsmInfo *MAI = new M68kELFMCAsmInfo(TT); 76 77 // Initialize initial frame state. 78 // Calculate amount of bytes used for return address storing 79 int StackGrowth = -4; 80 81 // Initial state of the frame pointer is SP+StackGrowth. 82 // TODO: Add tests for `cfi_*` directives 83 MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa( 84 nullptr, MRI.getDwarfRegNum(llvm::M68k::SP, true), -StackGrowth); 85 MAI->addInitialFrameState(Inst); 86 87 // Add return address to move list 88 Inst = MCCFIInstruction::createOffset( 89 nullptr, MRI.getDwarfRegNum(M68k::PC, true), StackGrowth); 90 MAI->addInitialFrameState(Inst); 91 92 return MAI; 93 } 94 95 static MCRelocationInfo *createM68kMCRelocationInfo(const Triple &TheTriple, 96 MCContext &Ctx) { 97 // Default to the stock relocation info. 98 return llvm::createMCRelocationInfo(TheTriple, Ctx); 99 } 100 101 static MCInstPrinter *createM68kMCInstPrinter(const Triple &T, 102 unsigned SyntaxVariant, 103 const MCAsmInfo &MAI, 104 const MCInstrInfo &MII, 105 const MCRegisterInfo &MRI) { 106 return new M68kInstPrinter(MAI, MII, MRI); 107 } 108 109 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeM68kTargetMC() { 110 Target &T = getTheM68kTarget(); 111 112 // Register the MC asm info. 113 RegisterMCAsmInfoFn X(T, createM68kMCAsmInfo); 114 115 // Register the MC instruction info. 116 TargetRegistry::RegisterMCInstrInfo(T, createM68kMCInstrInfo); 117 118 // Register the MC register info. 119 TargetRegistry::RegisterMCRegInfo(T, createM68kMCRegisterInfo); 120 121 // Register the MC subtarget info. 122 TargetRegistry::RegisterMCSubtargetInfo(T, createM68kMCSubtargetInfo); 123 124 // Register the code emitter. 125 TargetRegistry::RegisterMCCodeEmitter(T, createM68kMCCodeEmitter); 126 127 // Register the MCInstPrinter. 128 TargetRegistry::RegisterMCInstPrinter(T, createM68kMCInstPrinter); 129 130 // Register the MC relocation info. 131 TargetRegistry::RegisterMCRelocationInfo(T, createM68kMCRelocationInfo); 132 133 // Register the asm backend. 134 TargetRegistry::RegisterMCAsmBackend(T, createM68kAsmBackend); 135 } 136