1 //===-- PPCMCTargetDesc.cpp - PowerPC 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 PowerPC specific target descriptions.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "PPCMCTargetDesc.h"
15 #include "InstPrinter/PPCInstPrinter.h"
16 #include "PPCMCAsmInfo.h"
17 #include "llvm/MC/MCCodeGenInfo.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/MC/MachineLocation.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/TargetRegistry.h"
25 
26 #define GET_INSTRINFO_MC_DESC
27 #include "PPCGenInstrInfo.inc"
28 
29 #define GET_SUBTARGETINFO_MC_DESC
30 #include "PPCGenSubtargetInfo.inc"
31 
32 #define GET_REGINFO_MC_DESC
33 #include "PPCGenRegisterInfo.inc"
34 
35 using namespace llvm;
36 
37 static MCInstrInfo *createPPCMCInstrInfo() {
38   MCInstrInfo *X = new MCInstrInfo();
39   InitPPCMCInstrInfo(X);
40   return X;
41 }
42 
43 static MCRegisterInfo *createPPCMCRegisterInfo(StringRef TT) {
44   Triple TheTriple(TT);
45   bool isPPC64 = (TheTriple.getArch() == Triple::ppc64);
46   unsigned Flavour = isPPC64 ? 0 : 1;
47   unsigned RA = isPPC64 ? PPC::LR8 : PPC::LR;
48 
49   MCRegisterInfo *X = new MCRegisterInfo();
50   InitPPCMCRegisterInfo(X, RA, Flavour, Flavour);
51   return X;
52 }
53 
54 static MCSubtargetInfo *createPPCMCSubtargetInfo(StringRef TT, StringRef CPU,
55                                                  StringRef FS) {
56   MCSubtargetInfo *X = new MCSubtargetInfo();
57   InitPPCMCSubtargetInfo(X, TT, CPU, FS);
58   return X;
59 }
60 
61 static MCAsmInfo *createPPCMCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) {
62   Triple TheTriple(TT);
63   bool isPPC64 = TheTriple.getArch() == Triple::ppc64;
64 
65   MCAsmInfo *MAI;
66   if (TheTriple.isOSDarwin())
67     MAI = new PPCMCAsmInfoDarwin(isPPC64);
68   else
69     MAI = new PPCLinuxMCAsmInfo(isPPC64);
70 
71   // Initial state of the frame pointer is R1.
72   unsigned Reg = isPPC64 ? PPC::X1 : PPC::R1;
73   MCCFIInstruction Inst =
74       MCCFIInstruction::createDefCfa(0, MRI.getDwarfRegNum(Reg, true), 0);
75   MAI->addInitialFrameState(Inst);
76 
77   return MAI;
78 }
79 
80 static MCCodeGenInfo *createPPCMCCodeGenInfo(StringRef TT, Reloc::Model RM,
81                                              CodeModel::Model CM,
82                                              CodeGenOpt::Level OL) {
83   MCCodeGenInfo *X = new MCCodeGenInfo();
84 
85   if (RM == Reloc::Default) {
86     Triple T(TT);
87     if (T.isOSDarwin())
88       RM = Reloc::DynamicNoPIC;
89     else
90       RM = Reloc::Static;
91   }
92   if (CM == CodeModel::Default) {
93     Triple T(TT);
94     if (!T.isOSDarwin() && T.getArch() == Triple::ppc64)
95       CM = CodeModel::Medium;
96   }
97   X->InitMCCodeGenInfo(RM, CM, OL);
98   return X;
99 }
100 
101 // This is duplicated code. Refactor this.
102 static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
103                                     MCContext &Ctx, MCAsmBackend &MAB,
104                                     raw_ostream &OS,
105                                     MCCodeEmitter *Emitter,
106                                     bool RelaxAll,
107                                     bool NoExecStack) {
108   if (Triple(TT).isOSDarwin())
109     return createMachOStreamer(Ctx, MAB, OS, Emitter, RelaxAll);
110 
111   return createELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll, NoExecStack);
112 }
113 
114 static MCInstPrinter *createPPCMCInstPrinter(const Target &T,
115                                              unsigned SyntaxVariant,
116                                              const MCAsmInfo &MAI,
117                                              const MCInstrInfo &MII,
118                                              const MCRegisterInfo &MRI,
119                                              const MCSubtargetInfo &STI) {
120   bool isDarwin = Triple(STI.getTargetTriple()).isOSDarwin();
121   return new PPCInstPrinter(MAI, MII, MRI, isDarwin);
122 }
123 
124 extern "C" void LLVMInitializePowerPCTargetMC() {
125   // Register the MC asm info.
126   RegisterMCAsmInfoFn C(ThePPC32Target, createPPCMCAsmInfo);
127   RegisterMCAsmInfoFn D(ThePPC64Target, createPPCMCAsmInfo);
128 
129   // Register the MC codegen info.
130   TargetRegistry::RegisterMCCodeGenInfo(ThePPC32Target, createPPCMCCodeGenInfo);
131   TargetRegistry::RegisterMCCodeGenInfo(ThePPC64Target, createPPCMCCodeGenInfo);
132 
133   // Register the MC instruction info.
134   TargetRegistry::RegisterMCInstrInfo(ThePPC32Target, createPPCMCInstrInfo);
135   TargetRegistry::RegisterMCInstrInfo(ThePPC64Target, createPPCMCInstrInfo);
136 
137   // Register the MC register info.
138   TargetRegistry::RegisterMCRegInfo(ThePPC32Target, createPPCMCRegisterInfo);
139   TargetRegistry::RegisterMCRegInfo(ThePPC64Target, createPPCMCRegisterInfo);
140 
141   // Register the MC subtarget info.
142   TargetRegistry::RegisterMCSubtargetInfo(ThePPC32Target,
143                                           createPPCMCSubtargetInfo);
144   TargetRegistry::RegisterMCSubtargetInfo(ThePPC64Target,
145                                           createPPCMCSubtargetInfo);
146 
147   // Register the MC Code Emitter
148   TargetRegistry::RegisterMCCodeEmitter(ThePPC32Target, createPPCMCCodeEmitter);
149   TargetRegistry::RegisterMCCodeEmitter(ThePPC64Target, createPPCMCCodeEmitter);
150 
151     // Register the asm backend.
152   TargetRegistry::RegisterMCAsmBackend(ThePPC32Target, createPPCAsmBackend);
153   TargetRegistry::RegisterMCAsmBackend(ThePPC64Target, createPPCAsmBackend);
154 
155   // Register the object streamer.
156   TargetRegistry::RegisterMCObjectStreamer(ThePPC32Target, createMCStreamer);
157   TargetRegistry::RegisterMCObjectStreamer(ThePPC64Target, createMCStreamer);
158 
159   // Register the MCInstPrinter.
160   TargetRegistry::RegisterMCInstPrinter(ThePPC32Target, createPPCMCInstPrinter);
161   TargetRegistry::RegisterMCInstPrinter(ThePPC64Target, createPPCMCInstPrinter);
162 }
163