BPFMCTargetDesc.cpp revision 321369 
1//===-- BPFMCTargetDesc.cpp - BPF Target Descriptions ---------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file provides BPF specific target descriptions.
11//
12//===----------------------------------------------------------------------===//
13
14#include "MCTargetDesc/BPFMCTargetDesc.h"
15#include "BPF.h"
16#include "InstPrinter/BPFInstPrinter.h"
17#include "MCTargetDesc/BPFMCAsmInfo.h"
18#include "llvm/MC/MCInstrInfo.h"
19#include "llvm/MC/MCRegisterInfo.h"
20#include "llvm/MC/MCSubtargetInfo.h"
21#include "llvm/Support/Host.h"
22#include "llvm/Support/TargetRegistry.h"
23
24#define GET_INSTRINFO_MC_DESC
25#include "BPFGenInstrInfo.inc"
26
27#define GET_SUBTARGETINFO_MC_DESC
28#include "BPFGenSubtargetInfo.inc"
29
30#define GET_REGINFO_MC_DESC
31#include "BPFGenRegisterInfo.inc"
32
33using namespace llvm;
34
35static MCInstrInfo *createBPFMCInstrInfo() {
36  MCInstrInfo *X = new MCInstrInfo();
37  InitBPFMCInstrInfo(X);
38  return X;
39}
40
41static MCRegisterInfo *createBPFMCRegisterInfo(const Triple &TT) {
42  MCRegisterInfo *X = new MCRegisterInfo();
43  InitBPFMCRegisterInfo(X, BPF::R11 /* RAReg doesn't exist */);
44  return X;
45}
46
47static MCSubtargetInfo *createBPFMCSubtargetInfo(const Triple &TT,
48                                                 StringRef CPU, StringRef FS) {
49  return createBPFMCSubtargetInfoImpl(TT, CPU, FS);
50}
51
52static MCStreamer *createBPFMCStreamer(const Triple &T,
53                                       MCContext &Ctx, MCAsmBackend &MAB,
54                                       raw_pwrite_stream &OS, MCCodeEmitter *Emitter,
55                                       bool RelaxAll) {
56  return createELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll);
57}
58
59static MCInstPrinter *createBPFMCInstPrinter(const Triple &T,
60                                             unsigned SyntaxVariant,
61                                             const MCAsmInfo &MAI,
62                                             const MCInstrInfo &MII,
63                                             const MCRegisterInfo &MRI) {
64  if (SyntaxVariant == 0)
65    return new BPFInstPrinter(MAI, MII, MRI);
66  return nullptr;
67}
68
69extern "C" void LLVMInitializeBPFTargetMC() {
70  for (Target *T :
71       {&getTheBPFleTarget(), &getTheBPFbeTarget(), &getTheBPFTarget()}) {
72    // Register the MC asm info.
73    RegisterMCAsmInfo<BPFMCAsmInfo> X(*T);
74
75    // Register the MC instruction info.
76    TargetRegistry::RegisterMCInstrInfo(*T, createBPFMCInstrInfo);
77
78    // Register the MC register info.
79    TargetRegistry::RegisterMCRegInfo(*T, createBPFMCRegisterInfo);
80
81    // Register the MC subtarget info.
82    TargetRegistry::RegisterMCSubtargetInfo(*T,
83                                            createBPFMCSubtargetInfo);
84
85    // Register the object streamer
86    TargetRegistry::RegisterELFStreamer(*T, createBPFMCStreamer);
87
88    // Register the MCInstPrinter.
89    TargetRegistry::RegisterMCInstPrinter(*T, createBPFMCInstPrinter);
90  }
91
92  // Register the MC code emitter
93  TargetRegistry::RegisterMCCodeEmitter(getTheBPFleTarget(),
94                                        createBPFMCCodeEmitter);
95  TargetRegistry::RegisterMCCodeEmitter(getTheBPFbeTarget(),
96                                        createBPFbeMCCodeEmitter);
97
98  // Register the ASM Backend
99  TargetRegistry::RegisterMCAsmBackend(getTheBPFleTarget(),
100                                       createBPFAsmBackend);
101  TargetRegistry::RegisterMCAsmBackend(getTheBPFbeTarget(),
102                                       createBPFbeAsmBackend);
103
104  if (sys::IsLittleEndianHost) {
105    TargetRegistry::RegisterMCCodeEmitter(getTheBPFTarget(),
106                                          createBPFMCCodeEmitter);
107    TargetRegistry::RegisterMCAsmBackend(getTheBPFTarget(),
108                                         createBPFAsmBackend);
109  } else {
110    TargetRegistry::RegisterMCCodeEmitter(getTheBPFTarget(),
111                                          createBPFbeMCCodeEmitter);
112    TargetRegistry::RegisterMCAsmBackend(getTheBPFTarget(),
113                                         createBPFbeAsmBackend);
114  }
115}
116