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/MCELFStreamer.h"
20 #include "llvm/MC/MCInstrInfo.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/MC/MCSubtargetInfo.h"
23 #include "llvm/MC/MCSymbol.h"
24 #include "llvm/MC/MachineLocation.h"
25 #include "llvm/Support/CommandLine.h"
26 #include "llvm/Support/ErrorHandling.h"
27 #include "llvm/Support/FormattedStream.h"
28 #include "llvm/Support/TargetRegistry.h"
29 
30 #define GET_INSTRINFO_MC_DESC
31 #include "MipsGenInstrInfo.inc"
32 
33 #define GET_SUBTARGETINFO_MC_DESC
34 #include "MipsGenSubtargetInfo.inc"
35 
36 #define GET_REGINFO_MC_DESC
37 #include "MipsGenRegisterInfo.inc"
38 
39 using namespace llvm;
40 
41 static std::string ParseMipsTriple(StringRef TT, StringRef CPU) {
42   std::string MipsArchFeature;
43   size_t DashPosition = 0;
44   StringRef TheTriple;
45 
46   // Let's see if there is a dash, like mips-unknown-linux.
47   DashPosition = TT.find('-');
48 
49   if (DashPosition == StringRef::npos) {
50     // No dash, we check the string size.
51     TheTriple = TT.substr(0);
52   } else {
53     // We are only interested in substring before dash.
54     TheTriple = TT.substr(0,DashPosition);
55   }
56 
57   if (TheTriple == "mips" || TheTriple == "mipsel") {
58     if (CPU.empty() || CPU == "mips32") {
59       MipsArchFeature = "+mips32";
60     } else if (CPU == "mips32r2") {
61       MipsArchFeature = "+mips32r2";
62     }
63   } else {
64       if (CPU.empty() || CPU == "mips64") {
65         MipsArchFeature = "+mips64";
66       } else if (CPU == "mips64r2") {
67         MipsArchFeature = "+mips64r2";
68       }
69   }
70   return MipsArchFeature;
71 }
72 
73 static MCInstrInfo *createMipsMCInstrInfo() {
74   MCInstrInfo *X = new MCInstrInfo();
75   InitMipsMCInstrInfo(X);
76   return X;
77 }
78 
79 static MCRegisterInfo *createMipsMCRegisterInfo(StringRef TT) {
80   MCRegisterInfo *X = new MCRegisterInfo();
81   InitMipsMCRegisterInfo(X, Mips::RA);
82   return X;
83 }
84 
85 static MCSubtargetInfo *createMipsMCSubtargetInfo(StringRef TT, StringRef CPU,
86                                                   StringRef FS) {
87   std::string ArchFS = ParseMipsTriple(TT,CPU);
88   if (!FS.empty()) {
89     if (!ArchFS.empty())
90       ArchFS = ArchFS + "," + FS.str();
91     else
92       ArchFS = FS;
93   }
94   MCSubtargetInfo *X = new MCSubtargetInfo();
95   InitMipsMCSubtargetInfo(X, TT, CPU, ArchFS);
96   return X;
97 }
98 
99 static MCAsmInfo *createMipsMCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) {
100   MCAsmInfo *MAI = new MipsMCAsmInfo(TT);
101 
102   unsigned SP = MRI.getDwarfRegNum(Mips::SP, true);
103   MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(0, SP, 0);
104   MAI->addInitialFrameState(Inst);
105 
106   return MAI;
107 }
108 
109 static MCCodeGenInfo *createMipsMCCodeGenInfo(StringRef TT, Reloc::Model RM,
110                                               CodeModel::Model CM,
111                                               CodeGenOpt::Level OL) {
112   MCCodeGenInfo *X = new MCCodeGenInfo();
113   if (CM == CodeModel::JITDefault)
114     RM = Reloc::Static;
115   else if (RM == Reloc::Default)
116     RM = Reloc::PIC_;
117   X->InitMCCodeGenInfo(RM, CM, OL);
118   return X;
119 }
120 
121 static MCInstPrinter *createMipsMCInstPrinter(const Target &T,
122                                               unsigned SyntaxVariant,
123                                               const MCAsmInfo &MAI,
124                                               const MCInstrInfo &MII,
125                                               const MCRegisterInfo &MRI,
126                                               const MCSubtargetInfo &STI) {
127   return new MipsInstPrinter(MAI, MII, MRI);
128 }
129 
130 static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
131                                     MCContext &Context, MCAsmBackend &MAB,
132                                     raw_ostream &OS, MCCodeEmitter *Emitter,
133                                     const MCSubtargetInfo &STI,
134                                     bool RelaxAll, bool NoExecStack) {
135   MCStreamer *S =
136       createELFStreamer(Context, MAB, OS, Emitter, RelaxAll, NoExecStack);
137   new MipsTargetELFStreamer(*S, STI);
138   return S;
139 }
140 
141 static MCStreamer *
142 createMCAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
143                     bool isVerboseAsm, bool useCFI, bool useDwarfDirectory,
144                     MCInstPrinter *InstPrint, MCCodeEmitter *CE,
145                     MCAsmBackend *TAB, bool ShowInst) {
146   MCStreamer *S =
147       llvm::createAsmStreamer(Ctx, OS, isVerboseAsm, useCFI, useDwarfDirectory,
148                               InstPrint, CE, TAB, ShowInst);
149   new MipsTargetAsmStreamer(*S, OS);
150   return S;
151 }
152 
153 extern "C" void LLVMInitializeMipsTargetMC() {
154   // Register the MC asm info.
155   RegisterMCAsmInfoFn X(TheMipsTarget, createMipsMCAsmInfo);
156   RegisterMCAsmInfoFn Y(TheMipselTarget, createMipsMCAsmInfo);
157   RegisterMCAsmInfoFn A(TheMips64Target, createMipsMCAsmInfo);
158   RegisterMCAsmInfoFn B(TheMips64elTarget, createMipsMCAsmInfo);
159 
160   // Register the MC codegen info.
161   TargetRegistry::RegisterMCCodeGenInfo(TheMipsTarget,
162                                         createMipsMCCodeGenInfo);
163   TargetRegistry::RegisterMCCodeGenInfo(TheMipselTarget,
164                                         createMipsMCCodeGenInfo);
165   TargetRegistry::RegisterMCCodeGenInfo(TheMips64Target,
166                                         createMipsMCCodeGenInfo);
167   TargetRegistry::RegisterMCCodeGenInfo(TheMips64elTarget,
168                                         createMipsMCCodeGenInfo);
169 
170   // Register the MC instruction info.
171   TargetRegistry::RegisterMCInstrInfo(TheMipsTarget, createMipsMCInstrInfo);
172   TargetRegistry::RegisterMCInstrInfo(TheMipselTarget, createMipsMCInstrInfo);
173   TargetRegistry::RegisterMCInstrInfo(TheMips64Target, createMipsMCInstrInfo);
174   TargetRegistry::RegisterMCInstrInfo(TheMips64elTarget,
175                                       createMipsMCInstrInfo);
176 
177   // Register the MC register info.
178   TargetRegistry::RegisterMCRegInfo(TheMipsTarget, createMipsMCRegisterInfo);
179   TargetRegistry::RegisterMCRegInfo(TheMipselTarget, createMipsMCRegisterInfo);
180   TargetRegistry::RegisterMCRegInfo(TheMips64Target, createMipsMCRegisterInfo);
181   TargetRegistry::RegisterMCRegInfo(TheMips64elTarget,
182                                     createMipsMCRegisterInfo);
183 
184   // Register the MC Code Emitter
185   TargetRegistry::RegisterMCCodeEmitter(TheMipsTarget,
186                                         createMipsMCCodeEmitterEB);
187   TargetRegistry::RegisterMCCodeEmitter(TheMipselTarget,
188                                         createMipsMCCodeEmitterEL);
189   TargetRegistry::RegisterMCCodeEmitter(TheMips64Target,
190                                         createMipsMCCodeEmitterEB);
191   TargetRegistry::RegisterMCCodeEmitter(TheMips64elTarget,
192                                         createMipsMCCodeEmitterEL);
193 
194   // Register the object streamer.
195   TargetRegistry::RegisterMCObjectStreamer(TheMipsTarget, createMCStreamer);
196   TargetRegistry::RegisterMCObjectStreamer(TheMipselTarget, createMCStreamer);
197   TargetRegistry::RegisterMCObjectStreamer(TheMips64Target, createMCStreamer);
198   TargetRegistry::RegisterMCObjectStreamer(TheMips64elTarget,
199                                            createMCStreamer);
200 
201   // Register the asm streamer.
202   TargetRegistry::RegisterAsmStreamer(TheMipsTarget, createMCAsmStreamer);
203   TargetRegistry::RegisterAsmStreamer(TheMipselTarget, createMCAsmStreamer);
204   TargetRegistry::RegisterAsmStreamer(TheMips64Target, createMCAsmStreamer);
205   TargetRegistry::RegisterAsmStreamer(TheMips64elTarget, createMCAsmStreamer);
206 
207   // Register the asm backend.
208   TargetRegistry::RegisterMCAsmBackend(TheMipsTarget,
209                                        createMipsAsmBackendEB32);
210   TargetRegistry::RegisterMCAsmBackend(TheMipselTarget,
211                                        createMipsAsmBackendEL32);
212   TargetRegistry::RegisterMCAsmBackend(TheMips64Target,
213                                        createMipsAsmBackendEB64);
214   TargetRegistry::RegisterMCAsmBackend(TheMips64elTarget,
215                                        createMipsAsmBackendEL64);
216 
217   // Register the MC subtarget info.
218   TargetRegistry::RegisterMCSubtargetInfo(TheMipsTarget,
219                                           createMipsMCSubtargetInfo);
220   TargetRegistry::RegisterMCSubtargetInfo(TheMipselTarget,
221                                           createMipsMCSubtargetInfo);
222   TargetRegistry::RegisterMCSubtargetInfo(TheMips64Target,
223                                           createMipsMCSubtargetInfo);
224   TargetRegistry::RegisterMCSubtargetInfo(TheMips64elTarget,
225                                           createMipsMCSubtargetInfo);
226 
227   // Register the MCInstPrinter.
228   TargetRegistry::RegisterMCInstPrinter(TheMipsTarget,
229                                         createMipsMCInstPrinter);
230   TargetRegistry::RegisterMCInstPrinter(TheMipselTarget,
231                                         createMipsMCInstPrinter);
232   TargetRegistry::RegisterMCInstPrinter(TheMips64Target,
233                                         createMipsMCInstPrinter);
234   TargetRegistry::RegisterMCInstPrinter(TheMips64elTarget,
235                                         createMipsMCInstPrinter);
236 }
237