1 //===-- CSKYMCTargetDesc.cpp - CSKY Target Descriptions -------------------===//
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 /// This file provides CSKY specific target descriptions.
10 ///
11 //===----------------------------------------------------------------------===//
12
13 #include "CSKYMCTargetDesc.h"
14 #include "CSKYAsmBackend.h"
15 #include "CSKYELFStreamer.h"
16 #include "CSKYInstPrinter.h"
17 #include "CSKYMCAsmInfo.h"
18 #include "CSKYTargetStreamer.h"
19 #include "TargetInfo/CSKYTargetInfo.h"
20 #include "llvm/MC/MCAssembler.h"
21 #include "llvm/MC/MCInstrAnalysis.h"
22 #include "llvm/MC/MCInstrInfo.h"
23 #include "llvm/MC/MCRegisterInfo.h"
24 #include "llvm/MC/MCSubtargetInfo.h"
25 #include "llvm/MC/TargetRegistry.h"
26
27 #define GET_INSTRINFO_MC_DESC
28 #define ENABLE_INSTR_PREDICATE_VERIFIER
29 #include "CSKYGenInstrInfo.inc"
30
31 #define GET_REGINFO_MC_DESC
32 #include "CSKYGenRegisterInfo.inc"
33
34 #define GET_SUBTARGETINFO_MC_DESC
35 #include "CSKYGenSubtargetInfo.inc"
36
37 using namespace llvm;
38
createCSKYMCAsmInfo(const MCRegisterInfo & MRI,const Triple & TT,const MCTargetOptions & Options)39 static MCAsmInfo *createCSKYMCAsmInfo(const MCRegisterInfo &MRI,
40 const Triple &TT,
41 const MCTargetOptions &Options) {
42 MCAsmInfo *MAI = new CSKYMCAsmInfo(TT);
43
44 // Initial state of the frame pointer is SP.
45 unsigned Reg = MRI.getDwarfRegNum(CSKY::R14, true);
46 MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, Reg, 0);
47 MAI->addInitialFrameState(Inst);
48 return MAI;
49 }
50
createCSKYMCInstrInfo()51 static MCInstrInfo *createCSKYMCInstrInfo() {
52 MCInstrInfo *Info = new MCInstrInfo();
53 InitCSKYMCInstrInfo(Info);
54 return Info;
55 }
56
createCSKYMCInstPrinter(const Triple & T,unsigned SyntaxVariant,const MCAsmInfo & MAI,const MCInstrInfo & MII,const MCRegisterInfo & MRI)57 static MCInstPrinter *createCSKYMCInstPrinter(const Triple &T,
58 unsigned SyntaxVariant,
59 const MCAsmInfo &MAI,
60 const MCInstrInfo &MII,
61 const MCRegisterInfo &MRI) {
62 return new CSKYInstPrinter(MAI, MII, MRI);
63 }
64
createCSKYMCRegisterInfo(const Triple & TT)65 static MCRegisterInfo *createCSKYMCRegisterInfo(const Triple &TT) {
66 MCRegisterInfo *Info = new MCRegisterInfo();
67 InitCSKYMCRegisterInfo(Info, CSKY::R15);
68 return Info;
69 }
70
createCSKYMCSubtargetInfo(const Triple & TT,StringRef CPU,StringRef FS)71 static MCSubtargetInfo *createCSKYMCSubtargetInfo(const Triple &TT,
72 StringRef CPU, StringRef FS) {
73 std::string CPUName = std::string(CPU);
74 if (CPUName.empty())
75 CPUName = "generic";
76 return createCSKYMCSubtargetInfoImpl(TT, CPUName, /*TuneCPU=*/CPUName, FS);
77 }
78
79 static MCTargetStreamer *
createCSKYObjectTargetStreamer(MCStreamer & S,const MCSubtargetInfo & STI)80 createCSKYObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) {
81 const Triple &TT = STI.getTargetTriple();
82 if (TT.isOSBinFormatELF())
83 return new CSKYTargetELFStreamer(S, STI);
84 return nullptr;
85 }
86
createELFStreamer(const Triple & T,MCContext & Ctx,std::unique_ptr<MCAsmBackend> && MAB,std::unique_ptr<MCObjectWriter> && OW,std::unique_ptr<MCCodeEmitter> && Emitter)87 static MCStreamer *createELFStreamer(const Triple &T, MCContext &Ctx,
88 std::unique_ptr<MCAsmBackend> &&MAB,
89 std::unique_ptr<MCObjectWriter> &&OW,
90 std::unique_ptr<MCCodeEmitter> &&Emitter) {
91 CSKYELFStreamer *S = new CSKYELFStreamer(Ctx, std::move(MAB), std::move(OW),
92 std::move(Emitter));
93
94 return S;
95 }
96
97 static MCTargetStreamer *
createCSKYAsmTargetStreamer(MCStreamer & S,formatted_raw_ostream & OS,MCInstPrinter * InstPrinter)98 createCSKYAsmTargetStreamer(MCStreamer &S, formatted_raw_ostream &OS,
99 MCInstPrinter *InstPrinter) {
100 return new CSKYTargetAsmStreamer(S, OS);
101 }
102
createCSKYNullTargetStreamer(MCStreamer & S)103 static MCTargetStreamer *createCSKYNullTargetStreamer(MCStreamer &S) {
104 return new CSKYTargetStreamer(S);
105 }
106
107 namespace {
108
109 class CSKYMCInstrAnalysis : public MCInstrAnalysis {
110 public:
CSKYMCInstrAnalysis(const MCInstrInfo * Info)111 explicit CSKYMCInstrAnalysis(const MCInstrInfo *Info)
112 : MCInstrAnalysis(Info) {}
113
evaluateBranch(const MCInst & Inst,uint64_t Addr,uint64_t Size,uint64_t & Target) const114 bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
115 uint64_t &Target) const override {
116 if (isConditionalBranch(Inst) || isUnconditionalBranch(Inst)) {
117 int64_t Imm;
118 Imm = Inst.getOperand(Inst.getNumOperands() - 1).getImm();
119 Target = Addr + Imm;
120 return true;
121 }
122
123 if (Inst.getOpcode() == CSKY::BSR32) {
124 Target = Addr + Inst.getOperand(0).getImm();
125 return true;
126 }
127
128 switch (Inst.getOpcode()) {
129 default:
130 return false;
131 case CSKY::LRW16:
132 case CSKY::LRW32:
133 case CSKY::JSRI32:
134 case CSKY::JMPI32:
135 int64_t Imm = Inst.getOperand(Inst.getNumOperands() - 1).getImm();
136 Target = ((Addr + Imm) & 0xFFFFFFFC);
137 return true;
138 }
139
140 return false;
141 }
142 };
143
144 } // end anonymous namespace
145
createCSKYInstrAnalysis(const MCInstrInfo * Info)146 static MCInstrAnalysis *createCSKYInstrAnalysis(const MCInstrInfo *Info) {
147 return new CSKYMCInstrAnalysis(Info);
148 }
149
LLVMInitializeCSKYTargetMC()150 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeCSKYTargetMC() {
151 auto &CSKYTarget = getTheCSKYTarget();
152 TargetRegistry::RegisterMCAsmBackend(CSKYTarget, createCSKYAsmBackend);
153 TargetRegistry::RegisterMCAsmInfo(CSKYTarget, createCSKYMCAsmInfo);
154 TargetRegistry::RegisterMCInstrInfo(CSKYTarget, createCSKYMCInstrInfo);
155 TargetRegistry::RegisterMCRegInfo(CSKYTarget, createCSKYMCRegisterInfo);
156 TargetRegistry::RegisterMCCodeEmitter(CSKYTarget, createCSKYMCCodeEmitter);
157 TargetRegistry::RegisterMCInstPrinter(CSKYTarget, createCSKYMCInstPrinter);
158 TargetRegistry::RegisterMCSubtargetInfo(CSKYTarget,
159 createCSKYMCSubtargetInfo);
160 TargetRegistry::RegisterELFStreamer(CSKYTarget, createELFStreamer);
161 TargetRegistry::RegisterObjectTargetStreamer(CSKYTarget,
162 createCSKYObjectTargetStreamer);
163 TargetRegistry::RegisterAsmTargetStreamer(CSKYTarget,
164 createCSKYAsmTargetStreamer);
165 // Register the null target streamer.
166 TargetRegistry::RegisterNullTargetStreamer(CSKYTarget,
167 createCSKYNullTargetStreamer);
168 TargetRegistry::RegisterMCInstrAnalysis(CSKYTarget, createCSKYInstrAnalysis);
169 }
170