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
31using 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
44static std::string ParseM68kTriple(const Triple &TT, StringRef CPU) {
45 return "";
46}
47
48static MCInstrInfo *createM68kMCInstrInfo() {
49 MCInstrInfo *X = new MCInstrInfo();
50 InitM68kMCInstrInfo(X); // defined in M68kGenInstrInfo.inc
51 return X;
52}
53
54static 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
60static 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
73static 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 L: nullptr, Register: MRI.getDwarfRegNum(llvm::M68k::RegNum: SP, isEH: true), Offset: -StackGrowth);
86 MAI->addInitialFrameState(Inst);
87
88 // Add return address to move list
89 Inst = MCCFIInstruction::createOffset(
90 L: nullptr, Register: MRI.getDwarfRegNum(RegNum: M68k::PC, isEH: true), Offset: StackGrowth);
91 MAI->addInitialFrameState(Inst);
92
93 return MAI;
94}
95
96static MCRelocationInfo *createM68kMCRelocationInfo(const Triple &TheTriple,
97 MCContext &Ctx) {
98 // Default to the stock relocation info.
99 return llvm::createMCRelocationInfo(TT: TheTriple, Ctx);
100}
101
102static 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
110extern "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, Fn: createM68kMCInstrInfo);
118
119 // Register the MC register info.
120 TargetRegistry::RegisterMCRegInfo(T, Fn: createM68kMCRegisterInfo);
121
122 // Register the MC subtarget info.
123 TargetRegistry::RegisterMCSubtargetInfo(T, Fn: createM68kMCSubtargetInfo);
124
125 // Register the code emitter.
126 TargetRegistry::RegisterMCCodeEmitter(T, Fn: createM68kMCCodeEmitter);
127
128 // Register the MCInstPrinter.
129 TargetRegistry::RegisterMCInstPrinter(T, Fn: createM68kMCInstPrinter);
130
131 // Register the MC relocation info.
132 TargetRegistry::RegisterMCRelocationInfo(T, Fn: createM68kMCRelocationInfo);
133
134 // Register the asm backend.
135 TargetRegistry::RegisterMCAsmBackend(T, Fn: createM68kAsmBackend);
136}
137

source code of llvm/lib/Target/M68k/MCTargetDesc/M68kMCTargetDesc.cpp