BPFMCTargetDesc.cpp revision 309124 
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 "BPF.h"
15#include "BPFMCTargetDesc.h"
16#include "BPFMCAsmInfo.h"
17#include "InstPrinter/BPFInstPrinter.h"
18#include "llvm/MC/MCInstrInfo.h"
19#include "llvm/MC/MCRegisterInfo.h"
20#include "llvm/MC/MCStreamer.h"
21#include "llvm/MC/MCSubtargetInfo.h"
22#include "llvm/Support/ErrorHandling.h"
23#include "llvm/Support/TargetRegistry.h"
24
25#define GET_INSTRINFO_MC_DESC
26#include "BPFGenInstrInfo.inc"
27
28#define GET_SUBTARGETINFO_MC_DESC
29#include "BPFGenSubtargetInfo.inc"
30
31#define GET_REGINFO_MC_DESC
32#include "BPFGenRegisterInfo.inc"
33
34using namespace llvm;
35
36static MCInstrInfo *createBPFMCInstrInfo() {
37  MCInstrInfo *X = new MCInstrInfo();
38  InitBPFMCInstrInfo(X);
39  return X;
40}
41
42static MCRegisterInfo *createBPFMCRegisterInfo(const Triple &TT) {
43  MCRegisterInfo *X = new MCRegisterInfo();
44  InitBPFMCRegisterInfo(X, BPF::R11 /* RAReg doesn't exist */);
45  return X;
46}
47
48static MCSubtargetInfo *createBPFMCSubtargetInfo(const Triple &TT,
49                                                 StringRef CPU, StringRef FS) {
50  return createBPFMCSubtargetInfoImpl(TT, CPU, FS);
51}
52
53static MCStreamer *createBPFMCStreamer(const Triple &T,
54                                       MCContext &Ctx, MCAsmBackend &MAB,
55                                       raw_pwrite_stream &OS, MCCodeEmitter *Emitter,
56                                       bool RelaxAll) {
57  return createELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll);
58}
59
60static MCInstPrinter *createBPFMCInstPrinter(const Triple &T,
61                                             unsigned SyntaxVariant,
62                                             const MCAsmInfo &MAI,
63                                             const MCInstrInfo &MII,
64                                             const MCRegisterInfo &MRI) {
65  if (SyntaxVariant == 0)
66    return new BPFInstPrinter(MAI, MII, MRI);
67  return 0;
68}
69
70extern "C" void LLVMInitializeBPFTargetMC() {
71  for (Target *T : {&TheBPFleTarget, &TheBPFbeTarget, &TheBPFTarget}) {
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(TheBPFleTarget, createBPFMCCodeEmitter);
94  TargetRegistry::RegisterMCCodeEmitter(TheBPFbeTarget, createBPFbeMCCodeEmitter);
95
96  // Register the ASM Backend
97  TargetRegistry::RegisterMCAsmBackend(TheBPFleTarget, createBPFAsmBackend);
98  TargetRegistry::RegisterMCAsmBackend(TheBPFbeTarget, createBPFbeAsmBackend);
99
100  if (sys::IsLittleEndianHost) {
101    TargetRegistry::RegisterMCCodeEmitter(TheBPFTarget, createBPFMCCodeEmitter);
102    TargetRegistry::RegisterMCAsmBackend(TheBPFTarget, createBPFAsmBackend);
103  } else {
104    TargetRegistry::RegisterMCCodeEmitter(TheBPFTarget, createBPFbeMCCodeEmitter);
105    TargetRegistry::RegisterMCAsmBackend(TheBPFTarget, createBPFbeAsmBackend);
106  }
107}
108