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