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/MC/TargetRegistry.h" 27 #include "llvm/Support/CommandLine.h" 28 #include "llvm/Support/ErrorHandling.h" 29 #include "llvm/Support/FormattedStream.h" 30 31 using namespace llvm; 32 33 #define GET_INSTRINFO_MC_DESC 34 #define ENABLE_INSTR_PREDICATE_VERIFIER 35 #include "M68kGenInstrInfo.inc" 36 37 #define GET_SUBTARGETINFO_MC_DESC 38 #include "M68kGenSubtargetInfo.inc" 39 40 #define GET_REGINFO_MC_DESC 41 #include "M68kGenRegisterInfo.inc" 42 43 // TODO Implement feature set parsing logics 44 static std::string ParseM68kTriple(const Triple &TT, StringRef CPU) { 45 return ""; 46 } 47 48 static MCInstrInfo *createM68kMCInstrInfo() { 49 MCInstrInfo *X = new MCInstrInfo(); 50 InitM68kMCInstrInfo(X); // defined in M68kGenInstrInfo.inc 51 return X; 52 } 53 54 static MCRegisterInfo *createM68kMCRegisterInfo(const Triple &TT) { 55 MCRegisterInfo *X = new MCRegisterInfo(); 56 InitM68kMCRegisterInfo(X, llvm::M68k::A0, 0, 0, llvm::M68k::PC); 57 return X; 58 } 59 60 static MCSubtargetInfo *createM68kMCSubtargetInfo(const Triple &TT, 61 StringRef CPU, StringRef FS) { 62 std::string ArchFS = ParseM68kTriple(TT, CPU); 63 if (!FS.empty()) { 64 if (!ArchFS.empty()) { 65 ArchFS = (ArchFS + "," + FS).str(); 66 } else { 67 ArchFS = FS.str(); 68 } 69 } 70 return createM68kMCSubtargetInfoImpl(TT, CPU, /*TuneCPU=*/CPU, ArchFS); 71 } 72 73 static MCAsmInfo *createM68kMCAsmInfo(const MCRegisterInfo &MRI, 74 const Triple &TT, 75 const MCTargetOptions &TO) { 76 MCAsmInfo *MAI = new M68kELFMCAsmInfo(TT); 77 78 // Initialize initial frame state. 79 // Calculate amount of bytes used for return address storing 80 int StackGrowth = -4; 81 82 // Initial state of the frame pointer is SP+StackGrowth. 83 // TODO: Add tests for `cfi_*` directives 84 MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa( 85 nullptr, MRI.getDwarfRegNum(llvm::M68k::SP, true), -StackGrowth); 86 MAI->addInitialFrameState(Inst); 87 88 // Add return address to move list 89 Inst = MCCFIInstruction::createOffset( 90 nullptr, MRI.getDwarfRegNum(M68k::PC, true), StackGrowth); 91 MAI->addInitialFrameState(Inst); 92 93 return MAI; 94 } 95 96 static MCRelocationInfo *createM68kMCRelocationInfo(const Triple &TheTriple, 97 MCContext &Ctx) { 98 // Default to the stock relocation info. 99 return llvm::createMCRelocationInfo(TheTriple, Ctx); 100 } 101 102 static MCInstPrinter *createM68kMCInstPrinter(const Triple &T, 103 unsigned SyntaxVariant, 104 const MCAsmInfo &MAI, 105 const MCInstrInfo &MII, 106 const MCRegisterInfo &MRI) { 107 return new M68kInstPrinter(MAI, MII, MRI); 108 } 109 110 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeM68kTargetMC() { 111 Target &T = getTheM68kTarget(); 112 113 // Register the MC asm info. 114 RegisterMCAsmInfoFn X(T, createM68kMCAsmInfo); 115 116 // Register the MC instruction info. 117 TargetRegistry::RegisterMCInstrInfo(T, createM68kMCInstrInfo); 118 119 // Register the MC register info. 120 TargetRegistry::RegisterMCRegInfo(T, createM68kMCRegisterInfo); 121 122 // Register the MC subtarget info. 123 TargetRegistry::RegisterMCSubtargetInfo(T, createM68kMCSubtargetInfo); 124 125 // Register the code emitter. 126 TargetRegistry::RegisterMCCodeEmitter(T, createM68kMCCodeEmitter); 127 128 // Register the MCInstPrinter. 129 TargetRegistry::RegisterMCInstPrinter(T, createM68kMCInstPrinter); 130 131 // Register the MC relocation info. 132 TargetRegistry::RegisterMCRelocationInfo(T, createM68kMCRelocationInfo); 133 134 // Register the asm backend. 135 TargetRegistry::RegisterMCAsmBackend(T, createM68kAsmBackend); 136 } 137