MipsMCTargetDesc.cpp revision 5e195a4c8d8cd4498ab7e0aa16a3b6f273daf457 
1//===-- MipsMCTargetDesc.cpp - Mips 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 Mips specific target descriptions.
11//
12//===----------------------------------------------------------------------===//
13
14#include "MipsMCTargetDesc.h"
15#include "InstPrinter/MipsInstPrinter.h"
16#include "MipsMCAsmInfo.h"
17#include "llvm/MC/MCCodeGenInfo.h"
18#include "llvm/MC/MCELFStreamer.h"
19#include "llvm/MC/MCInstrInfo.h"
20#include "llvm/MC/MCRegisterInfo.h"
21#include "llvm/MC/MCSubtargetInfo.h"
22#include "llvm/MC/MachineLocation.h"
23#include "llvm/Support/ErrorHandling.h"
24#include "llvm/Support/TargetRegistry.h"
25
26#define GET_INSTRINFO_MC_DESC
27#include "MipsGenInstrInfo.inc"
28
29#define GET_SUBTARGETINFO_MC_DESC
30#include "MipsGenSubtargetInfo.inc"
31
32#define GET_REGINFO_MC_DESC
33#include "MipsGenRegisterInfo.inc"
34
35using namespace llvm;
36
37static std::string ParseMipsTriple(StringRef TT, StringRef CPU) {
38  std::string MipsArchFeature;
39  size_t DashPosition = 0;
40  StringRef TheTriple;
41
42  // Let's see if there is a dash, like mips-unknown-linux.
43  DashPosition = TT.find('-');
44
45  if (DashPosition == StringRef::npos) {
46    // No dash, we check the string size.
47    TheTriple = TT.substr(0);
48  } else {
49    // We are only interested in substring before dash.
50    TheTriple = TT.substr(0,DashPosition);
51  }
52
53  if (TheTriple == "mips" || TheTriple == "mipsel") {
54    if (CPU.empty() || CPU == "mips32") {
55      MipsArchFeature = "+mips32";
56    } else if (CPU == "mips32r2") {
57      MipsArchFeature = "+mips32r2";
58    }
59  } else {
60      if (CPU.empty() || CPU == "mips64") {
61        MipsArchFeature = "+mips64";
62      } else if (CPU == "mips64r2") {
63        MipsArchFeature = "+mips64r2";
64      }
65  }
66  return MipsArchFeature;
67}
68
69static MCInstrInfo *createMipsMCInstrInfo() {
70  MCInstrInfo *X = new MCInstrInfo();
71  InitMipsMCInstrInfo(X);
72  return X;
73}
74
75static MCRegisterInfo *createMipsMCRegisterInfo(StringRef TT) {
76  MCRegisterInfo *X = new MCRegisterInfo();
77  InitMipsMCRegisterInfo(X, Mips::RA);
78  return X;
79}
80
81static MCSubtargetInfo *createMipsMCSubtargetInfo(StringRef TT, StringRef CPU,
82                                                  StringRef FS) {
83  std::string ArchFS = ParseMipsTriple(TT,CPU);
84  if (!FS.empty()) {
85    if (!ArchFS.empty())
86      ArchFS = ArchFS + "," + FS.str();
87    else
88      ArchFS = FS;
89  }
90  MCSubtargetInfo *X = new MCSubtargetInfo();
91  InitMipsMCSubtargetInfo(X, TT, CPU, ArchFS);
92  return X;
93}
94
95static MCAsmInfo *createMipsMCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) {
96  MCAsmInfo *MAI = new MipsMCAsmInfo(TT);
97
98  unsigned SP = MRI.getDwarfRegNum(Mips::SP, true);
99  MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(0, SP, 0);
100  MAI->addInitialFrameState(Inst);
101
102  return MAI;
103}
104
105static MCCodeGenInfo *createMipsMCCodeGenInfo(StringRef TT, Reloc::Model RM,
106                                              CodeModel::Model CM,
107                                              CodeGenOpt::Level OL) {
108  MCCodeGenInfo *X = new MCCodeGenInfo();
109  if (CM == CodeModel::JITDefault)
110    RM = Reloc::Static;
111  else if (RM == Reloc::Default)
112    RM = Reloc::PIC_;
113  X->InitMCCodeGenInfo(RM, CM, OL);
114  return X;
115}
116
117static MCInstPrinter *createMipsMCInstPrinter(const Target &T,
118                                              unsigned SyntaxVariant,
119                                              const MCAsmInfo &MAI,
120                                              const MCInstrInfo &MII,
121                                              const MCRegisterInfo &MRI,
122                                              const MCSubtargetInfo &STI) {
123  return new MipsInstPrinter(MAI, MII, MRI);
124}
125
126static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
127                                    MCContext &Ctx, MCAsmBackend &MAB,
128                                    raw_ostream &_OS,
129                                    MCCodeEmitter *_Emitter,
130                                    bool RelaxAll,
131                                    bool NoExecStack) {
132  Triple TheTriple(TT);
133
134  return createMipsELFStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll, NoExecStack);
135}
136
137extern "C" void LLVMInitializeMipsTargetMC() {
138  // Register the MC asm info.
139  RegisterMCAsmInfoFn X(TheMipsTarget, createMipsMCAsmInfo);
140  RegisterMCAsmInfoFn Y(TheMipselTarget, createMipsMCAsmInfo);
141  RegisterMCAsmInfoFn A(TheMips64Target, createMipsMCAsmInfo);
142  RegisterMCAsmInfoFn B(TheMips64elTarget, createMipsMCAsmInfo);
143
144  // Register the MC codegen info.
145  TargetRegistry::RegisterMCCodeGenInfo(TheMipsTarget,
146                                        createMipsMCCodeGenInfo);
147  TargetRegistry::RegisterMCCodeGenInfo(TheMipselTarget,
148                                        createMipsMCCodeGenInfo);
149  TargetRegistry::RegisterMCCodeGenInfo(TheMips64Target,
150                                        createMipsMCCodeGenInfo);
151  TargetRegistry::RegisterMCCodeGenInfo(TheMips64elTarget,
152                                        createMipsMCCodeGenInfo);
153
154  // Register the MC instruction info.
155  TargetRegistry::RegisterMCInstrInfo(TheMipsTarget, createMipsMCInstrInfo);
156  TargetRegistry::RegisterMCInstrInfo(TheMipselTarget, createMipsMCInstrInfo);
157  TargetRegistry::RegisterMCInstrInfo(TheMips64Target, createMipsMCInstrInfo);
158  TargetRegistry::RegisterMCInstrInfo(TheMips64elTarget,
159                                      createMipsMCInstrInfo);
160
161  // Register the MC register info.
162  TargetRegistry::RegisterMCRegInfo(TheMipsTarget, createMipsMCRegisterInfo);
163  TargetRegistry::RegisterMCRegInfo(TheMipselTarget, createMipsMCRegisterInfo);
164  TargetRegistry::RegisterMCRegInfo(TheMips64Target, createMipsMCRegisterInfo);
165  TargetRegistry::RegisterMCRegInfo(TheMips64elTarget,
166                                    createMipsMCRegisterInfo);
167
168  // Register the MC Code Emitter
169  TargetRegistry::RegisterMCCodeEmitter(TheMipsTarget,
170                                        createMipsMCCodeEmitterEB);
171  TargetRegistry::RegisterMCCodeEmitter(TheMipselTarget,
172                                        createMipsMCCodeEmitterEL);
173  TargetRegistry::RegisterMCCodeEmitter(TheMips64Target,
174                                        createMipsMCCodeEmitterEB);
175  TargetRegistry::RegisterMCCodeEmitter(TheMips64elTarget,
176                                        createMipsMCCodeEmitterEL);
177
178  // Register the object streamer.
179  TargetRegistry::RegisterMCObjectStreamer(TheMipsTarget, createMCStreamer);
180  TargetRegistry::RegisterMCObjectStreamer(TheMipselTarget, createMCStreamer);
181  TargetRegistry::RegisterMCObjectStreamer(TheMips64Target, createMCStreamer);
182  TargetRegistry::RegisterMCObjectStreamer(TheMips64elTarget,
183                                           createMCStreamer);
184
185  // Register the asm backend.
186  TargetRegistry::RegisterMCAsmBackend(TheMipsTarget,
187                                       createMipsAsmBackendEB32);
188  TargetRegistry::RegisterMCAsmBackend(TheMipselTarget,
189                                       createMipsAsmBackendEL32);
190  TargetRegistry::RegisterMCAsmBackend(TheMips64Target,
191                                       createMipsAsmBackendEB64);
192  TargetRegistry::RegisterMCAsmBackend(TheMips64elTarget,
193                                       createMipsAsmBackendEL64);
194
195  // Register the MC subtarget info.
196  TargetRegistry::RegisterMCSubtargetInfo(TheMipsTarget,
197                                          createMipsMCSubtargetInfo);
198  TargetRegistry::RegisterMCSubtargetInfo(TheMipselTarget,
199                                          createMipsMCSubtargetInfo);
200  TargetRegistry::RegisterMCSubtargetInfo(TheMips64Target,
201                                          createMipsMCSubtargetInfo);
202  TargetRegistry::RegisterMCSubtargetInfo(TheMips64elTarget,
203                                          createMipsMCSubtargetInfo);
204
205  // Register the MCInstPrinter.
206  TargetRegistry::RegisterMCInstPrinter(TheMipsTarget,
207                                        createMipsMCInstPrinter);
208  TargetRegistry::RegisterMCInstPrinter(TheMipselTarget,
209                                        createMipsMCInstPrinter);
210  TargetRegistry::RegisterMCInstPrinter(TheMips64Target,
211                                        createMipsMCInstPrinter);
212  TargetRegistry::RegisterMCInstPrinter(TheMips64elTarget,
213                                        createMipsMCInstPrinter);
214}
215