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1 //===-- LanaiMCTargetDesc.cpp - Lanai Target Descriptions -----------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file provides Lanai specific target descriptions.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #include "LanaiMCTargetDesc.h"
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15
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16 #include "InstPrinter/LanaiInstPrinter.h"
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17 #include "LanaiMCAsmInfo.h"
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18 #include "llvm/MC/MCInstrAnalysis.h"
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19 #include "llvm/MC/MCInstrInfo.h"
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20 #include "llvm/MC/MCStreamer.h"
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21 #include "llvm/MC/MCSubtargetInfo.h"
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22 #include "llvm/Support/ErrorHandling.h"
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23 #include "llvm/Support/TargetRegistry.h"
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24
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25 #define GET_INSTRINFO_MC_DESC
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26 #include "LanaiGenInstrInfo.inc"
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27
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28 #define GET_SUBTARGETINFO_MC_DESC
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29 #include "LanaiGenSubtargetInfo.inc"
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30
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31 #define GET_REGINFO_MC_DESC
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32 #include "LanaiGenRegisterInfo.inc"
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33
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34 using namespace llvm;
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35
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36 static MCInstrInfo *createLanaiMCInstrInfo() {
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37 MCInstrInfo *X = new MCInstrInfo();
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38 InitLanaiMCInstrInfo(X);
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39 return X;
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40 }
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41
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42 static MCRegisterInfo *createLanaiMCRegisterInfo(const Triple & /*TT*/) {
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43 MCRegisterInfo *X = new MCRegisterInfo();
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44 InitLanaiMCRegisterInfo(X, Lanai::RCA, 0, 0, Lanai::PC);
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45 return X;
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46 }
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47
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48 static MCSubtargetInfo *
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49 createLanaiMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
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50 std::string CPUName = CPU;
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51 if (CPUName.empty())
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52 CPUName = "generic";
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53
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54 return createLanaiMCSubtargetInfoImpl(TT, CPUName, FS);
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55 }
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56
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57 static MCStreamer *createMCStreamer(const Triple &T, MCContext &Context,
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58 MCAsmBackend &MAB, raw_pwrite_stream &OS,
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59 MCCodeEmitter *Emitter, bool RelaxAll) {
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60 if (!T.isOSBinFormatELF())
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61 llvm_unreachable("OS not supported");
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62
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63 return createELFStreamer(Context, MAB, OS, Emitter, RelaxAll);
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64 }
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65
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66 static MCInstPrinter *createLanaiMCInstPrinter(const Triple & /*T*/,
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67 unsigned SyntaxVariant,
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68 const MCAsmInfo &MAI,
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69 const MCInstrInfo &MII,
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70 const MCRegisterInfo &MRI) {
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71 if (SyntaxVariant == 0)
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72 return new LanaiInstPrinter(MAI, MII, MRI);
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73 return 0;
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74 }
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75
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76 static MCRelocationInfo *createLanaiElfRelocation(const Triple &TheTriple,
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77 MCContext &Ctx) {
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78 return createMCRelocationInfo(TheTriple, Ctx);
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79 }
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80
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81 namespace {
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82 class LanaiMCInstrAnalysis : public MCInstrAnalysis {
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83 public:
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84 explicit LanaiMCInstrAnalysis(const MCInstrInfo *Info)
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85 : MCInstrAnalysis(Info) {}
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86
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87 bool evaluateBranch(const MCInst &Inst, uint64_t Addr, uint64_t Size,
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88 uint64_t &Target) const override {
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89 if (Inst.getNumOperands() == 0)
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90 return false;
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91
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92 if (Info->get(Inst.getOpcode()).OpInfo[0].OperandType ==
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93 MCOI::OPERAND_PCREL) {
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94 int64_t Imm = Inst.getOperand(0).getImm();
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95 Target = Addr + Size + Imm;
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96 return true;
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97 } else {
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98 int64_t Imm = Inst.getOperand(0).getImm();
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99
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100 // Skip case where immediate is 0 as that occurs in file that isn't linked
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101 // and the branch target inferred would be wrong.
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102 if (Imm == 0)
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103 return false;
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104
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105 Target = Imm;
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106 return true;
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107 }
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108 }
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109 };
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110 } // end anonymous namespace
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111
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112 static MCInstrAnalysis *createLanaiInstrAnalysis(const MCInstrInfo *Info) {
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113 return new LanaiMCInstrAnalysis(Info);
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114 }
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115
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116 extern "C" void LLVMInitializeLanaiTargetMC() {
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117 // Register the MC asm info.
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118 RegisterMCAsmInfo<LanaiMCAsmInfo> X(getTheLanaiTarget());
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119
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120 // Register the MC instruction info.
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121 TargetRegistry::RegisterMCInstrInfo(getTheLanaiTarget(),
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122 createLanaiMCInstrInfo);
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123
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124 // Register the MC register info.
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125 TargetRegistry::RegisterMCRegInfo(getTheLanaiTarget(),
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126 createLanaiMCRegisterInfo);
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127
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128 // Register the MC subtarget info.
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129 TargetRegistry::RegisterMCSubtargetInfo(getTheLanaiTarget(),
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130 createLanaiMCSubtargetInfo);
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131
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132 // Register the MC code emitter
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133 TargetRegistry::RegisterMCCodeEmitter(getTheLanaiTarget(),
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134 llvm::createLanaiMCCodeEmitter);
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135
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136 // Register the ASM Backend
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137 TargetRegistry::RegisterMCAsmBackend(getTheLanaiTarget(),
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138 createLanaiAsmBackend);
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139
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140 // Register the MCInstPrinter.
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141 TargetRegistry::RegisterMCInstPrinter(getTheLanaiTarget(),
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142 createLanaiMCInstPrinter);
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143
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144 // Register the ELF streamer.
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145 TargetRegistry::RegisterELFStreamer(getTheLanaiTarget(), createMCStreamer);
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146
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147 // Register the MC relocation info.
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148 TargetRegistry::RegisterMCRelocationInfo(getTheLanaiTarget(),
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149 createLanaiElfRelocation);
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150
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151 // Register the MC instruction analyzer.
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152 TargetRegistry::RegisterMCInstrAnalysis(getTheLanaiTarget(),
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153 createLanaiInstrAnalysis);
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154 }
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