MipsMCTargetDesc.cpp revision b21ab43cfc3fa0dacf5c95f04e58b6d804b59a16 
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 "MipsTargetStreamer.h"
18#include "llvm/MC/MCCodeGenInfo.h"
19#include "llvm/MC/MCELF.h"
20#include "llvm/MC/MCELFStreamer.h"
21#include "llvm/MC/MCInstrInfo.h"
22#include "llvm/MC/MCRegisterInfo.h"
23#include "llvm/MC/MCSubtargetInfo.h"
24#include "llvm/MC/MCSymbol.h"
25#include "llvm/MC/MachineLocation.h"
26#include "llvm/Support/CommandLine.h"
27#include "llvm/Support/ErrorHandling.h"
28#include "llvm/Support/FormattedStream.h"
29#include "llvm/Support/TargetRegistry.h"
30
31#define GET_INSTRINFO_MC_DESC
32#include "MipsGenInstrInfo.inc"
33
34#define GET_SUBTARGETINFO_MC_DESC
35#include "MipsGenSubtargetInfo.inc"
36
37#define GET_REGINFO_MC_DESC
38#include "MipsGenRegisterInfo.inc"
39
40using namespace llvm;
41
42static cl::opt<bool> PrintHackDirectives("print-hack-directives",
43                                         cl::init(false), cl::Hidden);
44
45static std::string ParseMipsTriple(StringRef TT, StringRef CPU) {
46  std::string MipsArchFeature;
47  size_t DashPosition = 0;
48  StringRef TheTriple;
49
50  // Let's see if there is a dash, like mips-unknown-linux.
51  DashPosition = TT.find('-');
52
53  if (DashPosition == StringRef::npos) {
54    // No dash, we check the string size.
55    TheTriple = TT.substr(0);
56  } else {
57    // We are only interested in substring before dash.
58    TheTriple = TT.substr(0,DashPosition);
59  }
60
61  if (TheTriple == "mips" || TheTriple == "mipsel") {
62    if (CPU.empty() || CPU == "mips32") {
63      MipsArchFeature = "+mips32";
64    } else if (CPU == "mips32r2") {
65      MipsArchFeature = "+mips32r2";
66    }
67  } else {
68      if (CPU.empty() || CPU == "mips64") {
69        MipsArchFeature = "+mips64";
70      } else if (CPU == "mips64r2") {
71        MipsArchFeature = "+mips64r2";
72      }
73  }
74  return MipsArchFeature;
75}
76
77static MCInstrInfo *createMipsMCInstrInfo() {
78  MCInstrInfo *X = new MCInstrInfo();
79  InitMipsMCInstrInfo(X);
80  return X;
81}
82
83static MCRegisterInfo *createMipsMCRegisterInfo(StringRef TT) {
84  MCRegisterInfo *X = new MCRegisterInfo();
85  InitMipsMCRegisterInfo(X, Mips::RA);
86  return X;
87}
88
89static MCSubtargetInfo *createMipsMCSubtargetInfo(StringRef TT, StringRef CPU,
90                                                  StringRef FS) {
91  std::string ArchFS = ParseMipsTriple(TT,CPU);
92  if (!FS.empty()) {
93    if (!ArchFS.empty())
94      ArchFS = ArchFS + "," + FS.str();
95    else
96      ArchFS = FS;
97  }
98  MCSubtargetInfo *X = new MCSubtargetInfo();
99  InitMipsMCSubtargetInfo(X, TT, CPU, ArchFS);
100  return X;
101}
102
103static MCAsmInfo *createMipsMCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) {
104  MCAsmInfo *MAI = new MipsMCAsmInfo(TT);
105
106  unsigned SP = MRI.getDwarfRegNum(Mips::SP, true);
107  MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(0, SP, 0);
108  MAI->addInitialFrameState(Inst);
109
110  return MAI;
111}
112
113static MCCodeGenInfo *createMipsMCCodeGenInfo(StringRef TT, Reloc::Model RM,
114                                              CodeModel::Model CM,
115                                              CodeGenOpt::Level OL) {
116  MCCodeGenInfo *X = new MCCodeGenInfo();
117  if (CM == CodeModel::JITDefault)
118    RM = Reloc::Static;
119  else if (RM == Reloc::Default)
120    RM = Reloc::PIC_;
121  X->InitMCCodeGenInfo(RM, CM, OL);
122  return X;
123}
124
125static MCInstPrinter *createMipsMCInstPrinter(const Target &T,
126                                              unsigned SyntaxVariant,
127                                              const MCAsmInfo &MAI,
128                                              const MCInstrInfo &MII,
129                                              const MCRegisterInfo &MRI,
130                                              const MCSubtargetInfo &STI) {
131  return new MipsInstPrinter(MAI, MII, MRI);
132}
133
134namespace {
135class MipsTargetAsmStreamer : public MipsTargetStreamer {
136  formatted_raw_ostream &OS;
137
138public:
139  MipsTargetAsmStreamer(formatted_raw_ostream &OS);
140  virtual void emitMipsHackELFFlags(unsigned Flags);
141  virtual void emitMipsHackSTOCG(MCSymbol *Sym, unsigned Val);
142};
143
144MipsTargetAsmStreamer::MipsTargetAsmStreamer(formatted_raw_ostream &OS)
145    : OS(OS) {}
146
147void MipsTargetAsmStreamer::emitMipsHackELFFlags(unsigned Flags) {
148  if (!PrintHackDirectives)
149    return;
150
151  OS << "\t.mips_hack_elf_flags 0x";
152  OS.write_hex(Flags);
153  OS << '\n';
154}
155void MipsTargetAsmStreamer::emitMipsHackSTOCG(MCSymbol *Sym, unsigned Val) {
156  if (!PrintHackDirectives)
157    return;
158
159  OS << "\t.mips_hack_stocg ";
160  OS << Sym->getName();
161  OS << ", ";
162  OS << Val;
163  OS << '\n';
164}
165
166class MipsTargetELFStreamer : public MipsTargetStreamer {
167public:
168  MCELFStreamer &getStreamer();
169  MipsTargetELFStreamer();
170  virtual void emitMipsHackELFFlags(unsigned Flags);
171  virtual void emitMipsHackSTOCG(MCSymbol *Sym, unsigned Val);
172};
173
174MipsTargetELFStreamer::MipsTargetELFStreamer() {}
175
176MCELFStreamer &MipsTargetELFStreamer::getStreamer() {
177  return static_cast<MCELFStreamer &>(*Streamer);
178}
179
180void MipsTargetELFStreamer::emitMipsHackELFFlags(unsigned Flags) {
181  MCAssembler &MCA = getStreamer().getAssembler();
182  MCA.setELFHeaderEFlags(Flags);
183}
184
185// Set a symbol's STO flags
186void MipsTargetELFStreamer::emitMipsHackSTOCG(MCSymbol *Sym, unsigned Val) {
187  MCSymbolData &Data = getStreamer().getOrCreateSymbolData(Sym);
188  // The "other" values are stored in the last 6 bits of the second byte
189  // The traditional defines for STO values assume the full byte and thus
190  // the shift to pack it.
191  MCELF::setOther(Data, Val >> 2);
192}
193}
194
195static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
196                                    MCContext &Context, MCAsmBackend &MAB,
197                                    raw_ostream &OS, MCCodeEmitter *Emitter,
198                                    bool RelaxAll, bool NoExecStack) {
199  MipsTargetELFStreamer *S = new MipsTargetELFStreamer();
200  return createELFStreamer(Context, S, MAB, OS, Emitter, RelaxAll, NoExecStack);
201}
202
203static MCStreamer *
204createMCAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
205                    bool isVerboseAsm, bool useLoc, bool useCFI,
206                    bool useDwarfDirectory, MCInstPrinter *InstPrint,
207                    MCCodeEmitter *CE, MCAsmBackend *TAB, bool ShowInst) {
208  MipsTargetAsmStreamer *S = new MipsTargetAsmStreamer(OS);
209
210  return llvm::createAsmStreamer(Ctx, S, OS, isVerboseAsm, useLoc, useCFI,
211                                 useDwarfDirectory, InstPrint, CE, TAB,
212                                 ShowInst);
213}
214
215extern "C" void LLVMInitializeMipsTargetMC() {
216  // Register the MC asm info.
217  RegisterMCAsmInfoFn X(TheMipsTarget, createMipsMCAsmInfo);
218  RegisterMCAsmInfoFn Y(TheMipselTarget, createMipsMCAsmInfo);
219  RegisterMCAsmInfoFn A(TheMips64Target, createMipsMCAsmInfo);
220  RegisterMCAsmInfoFn B(TheMips64elTarget, createMipsMCAsmInfo);
221
222  // Register the MC codegen info.
223  TargetRegistry::RegisterMCCodeGenInfo(TheMipsTarget,
224                                        createMipsMCCodeGenInfo);
225  TargetRegistry::RegisterMCCodeGenInfo(TheMipselTarget,
226                                        createMipsMCCodeGenInfo);
227  TargetRegistry::RegisterMCCodeGenInfo(TheMips64Target,
228                                        createMipsMCCodeGenInfo);
229  TargetRegistry::RegisterMCCodeGenInfo(TheMips64elTarget,
230                                        createMipsMCCodeGenInfo);
231
232  // Register the MC instruction info.
233  TargetRegistry::RegisterMCInstrInfo(TheMipsTarget, createMipsMCInstrInfo);
234  TargetRegistry::RegisterMCInstrInfo(TheMipselTarget, createMipsMCInstrInfo);
235  TargetRegistry::RegisterMCInstrInfo(TheMips64Target, createMipsMCInstrInfo);
236  TargetRegistry::RegisterMCInstrInfo(TheMips64elTarget,
237                                      createMipsMCInstrInfo);
238
239  // Register the MC register info.
240  TargetRegistry::RegisterMCRegInfo(TheMipsTarget, createMipsMCRegisterInfo);
241  TargetRegistry::RegisterMCRegInfo(TheMipselTarget, createMipsMCRegisterInfo);
242  TargetRegistry::RegisterMCRegInfo(TheMips64Target, createMipsMCRegisterInfo);
243  TargetRegistry::RegisterMCRegInfo(TheMips64elTarget,
244                                    createMipsMCRegisterInfo);
245
246  // Register the MC Code Emitter
247  TargetRegistry::RegisterMCCodeEmitter(TheMipsTarget,
248                                        createMipsMCCodeEmitterEB);
249  TargetRegistry::RegisterMCCodeEmitter(TheMipselTarget,
250                                        createMipsMCCodeEmitterEL);
251  TargetRegistry::RegisterMCCodeEmitter(TheMips64Target,
252                                        createMipsMCCodeEmitterEB);
253  TargetRegistry::RegisterMCCodeEmitter(TheMips64elTarget,
254                                        createMipsMCCodeEmitterEL);
255
256  // Register the object streamer.
257  TargetRegistry::RegisterMCObjectStreamer(TheMipsTarget, createMCStreamer);
258  TargetRegistry::RegisterMCObjectStreamer(TheMipselTarget, createMCStreamer);
259  TargetRegistry::RegisterMCObjectStreamer(TheMips64Target, createMCStreamer);
260  TargetRegistry::RegisterMCObjectStreamer(TheMips64elTarget,
261                                           createMCStreamer);
262
263  // Register the asm streamer.
264  TargetRegistry::RegisterAsmStreamer(TheMipsTarget, createMCAsmStreamer);
265  TargetRegistry::RegisterAsmStreamer(TheMipselTarget, createMCAsmStreamer);
266  TargetRegistry::RegisterAsmStreamer(TheMips64Target, createMCAsmStreamer);
267  TargetRegistry::RegisterAsmStreamer(TheMips64elTarget, createMCAsmStreamer);
268
269  // Register the asm backend.
270  TargetRegistry::RegisterMCAsmBackend(TheMipsTarget,
271                                       createMipsAsmBackendEB32);
272  TargetRegistry::RegisterMCAsmBackend(TheMipselTarget,
273                                       createMipsAsmBackendEL32);
274  TargetRegistry::RegisterMCAsmBackend(TheMips64Target,
275                                       createMipsAsmBackendEB64);
276  TargetRegistry::RegisterMCAsmBackend(TheMips64elTarget,
277                                       createMipsAsmBackendEL64);
278
279  // Register the MC subtarget info.
280  TargetRegistry::RegisterMCSubtargetInfo(TheMipsTarget,
281                                          createMipsMCSubtargetInfo);
282  TargetRegistry::RegisterMCSubtargetInfo(TheMipselTarget,
283                                          createMipsMCSubtargetInfo);
284  TargetRegistry::RegisterMCSubtargetInfo(TheMips64Target,
285                                          createMipsMCSubtargetInfo);
286  TargetRegistry::RegisterMCSubtargetInfo(TheMips64elTarget,
287                                          createMipsMCSubtargetInfo);
288
289  // Register the MCInstPrinter.
290  TargetRegistry::RegisterMCInstPrinter(TheMipsTarget,
291                                        createMipsMCInstPrinter);
292  TargetRegistry::RegisterMCInstPrinter(TheMipselTarget,
293                                        createMipsMCInstPrinter);
294  TargetRegistry::RegisterMCInstPrinter(TheMips64Target,
295                                        createMipsMCInstPrinter);
296  TargetRegistry::RegisterMCInstPrinter(TheMips64elTarget,
297                                        createMipsMCInstPrinter);
298}
299