1 //===-- LoongArchMCTargetDesc.cpp - LoongArch 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 LoongArch specific target descriptions.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "LoongArchMCTargetDesc.h"
14 #include "LoongArchBaseInfo.h"
15 #include "LoongArchInstPrinter.h"
16 #include "LoongArchMCAsmInfo.h"
17 #include "TargetInfo/LoongArchTargetInfo.h"
18 #include "llvm/MC/MCAsmInfo.h"
19 #include "llvm/MC/MCDwarf.h"
20 #include "llvm/MC/MCInstrAnalysis.h"
21 #include "llvm/MC/MCInstrInfo.h"
22 #include "llvm/MC/MCRegisterInfo.h"
23 #include "llvm/MC/MCSubtargetInfo.h"
24 #include "llvm/MC/TargetRegistry.h"
25 #include "llvm/Support/Compiler.h"
26 
27 #define GET_INSTRINFO_MC_DESC
28 #define ENABLE_INSTR_PREDICATE_VERIFIER
29 #include "LoongArchGenInstrInfo.inc"
30 
31 #define GET_REGINFO_MC_DESC
32 #include "LoongArchGenRegisterInfo.inc"
33 
34 #define GET_SUBTARGETINFO_MC_DESC
35 #include "LoongArchGenSubtargetInfo.inc"
36 
37 using namespace llvm;
38 
39 static MCRegisterInfo *createLoongArchMCRegisterInfo(const Triple &TT) {
40   MCRegisterInfo *X = new MCRegisterInfo();
41   InitLoongArchMCRegisterInfo(X, LoongArch::R1);
42   return X;
43 }
44 
45 static MCInstrInfo *createLoongArchMCInstrInfo() {
46   MCInstrInfo *X = new MCInstrInfo();
47   InitLoongArchMCInstrInfo(X);
48   return X;
49 }
50 
51 static MCSubtargetInfo *
52 createLoongArchMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
53   if (CPU.empty())
54     CPU = TT.isArch64Bit() ? "la464" : "generic-la32";
55   return createLoongArchMCSubtargetInfoImpl(TT, CPU, /*TuneCPU*/ CPU, FS);
56 }
57 
58 static MCAsmInfo *createLoongArchMCAsmInfo(const MCRegisterInfo &MRI,
59                                            const Triple &TT,
60                                            const MCTargetOptions &Options) {
61   MCAsmInfo *MAI = new LoongArchMCAsmInfo(TT);
62 
63   // Initial state of the frame pointer is sp(r3).
64   MCRegister SP = MRI.getDwarfRegNum(LoongArch::R3, true);
65   MCCFIInstruction Inst = MCCFIInstruction::cfiDefCfa(nullptr, SP, 0);
66   MAI->addInitialFrameState(Inst);
67 
68   return MAI;
69 }
70 
71 static MCInstPrinter *createLoongArchMCInstPrinter(const Triple &T,
72                                                    unsigned SyntaxVariant,
73                                                    const MCAsmInfo &MAI,
74                                                    const MCInstrInfo &MII,
75                                                    const MCRegisterInfo &MRI) {
76   return new LoongArchInstPrinter(MAI, MII, MRI);
77 }
78 
79 namespace {
80 
81 class LoongArchMCInstrAnalysis : public MCInstrAnalysis {
82 public:
83   explicit LoongArchMCInstrAnalysis(const MCInstrInfo *Info)
84       : MCInstrAnalysis(Info) {}
85 
86   bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
87                       uint64_t &Target) const override {
88     unsigned NumOps = Inst.getNumOperands();
89     if (isBranch(Inst) || Inst.getOpcode() == LoongArch::BL) {
90       Target = Addr + Inst.getOperand(NumOps - 1).getImm();
91       return true;
92     }
93 
94     return false;
95   }
96 };
97 
98 } // end namespace
99 
100 static MCInstrAnalysis *createLoongArchInstrAnalysis(const MCInstrInfo *Info) {
101   return new LoongArchMCInstrAnalysis(Info);
102 }
103 
104 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeLoongArchTargetMC() {
105   for (Target *T : {&getTheLoongArch32Target(), &getTheLoongArch64Target()}) {
106     TargetRegistry::RegisterMCRegInfo(*T, createLoongArchMCRegisterInfo);
107     TargetRegistry::RegisterMCInstrInfo(*T, createLoongArchMCInstrInfo);
108     TargetRegistry::RegisterMCSubtargetInfo(*T, createLoongArchMCSubtargetInfo);
109     TargetRegistry::RegisterMCAsmInfo(*T, createLoongArchMCAsmInfo);
110     TargetRegistry::RegisterMCCodeEmitter(*T, createLoongArchMCCodeEmitter);
111     TargetRegistry::RegisterMCAsmBackend(*T, createLoongArchAsmBackend);
112     TargetRegistry::RegisterMCInstPrinter(*T, createLoongArchMCInstPrinter);
113     TargetRegistry::RegisterMCInstrAnalysis(*T, createLoongArchInstrAnalysis);
114   }
115 }
116