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      1 //===-- XCoreMCTargetDesc.cpp - XCore 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 XCore specific target descriptions.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #include "XCoreMCTargetDesc.h"
     15 #include "InstPrinter/XCoreInstPrinter.h"
     16 #include "XCoreMCAsmInfo.h"
     17 #include "XCoreTargetStreamer.h"
     18 #include "llvm/MC/MCCodeGenInfo.h"
     19 #include "llvm/MC/MCInstrInfo.h"
     20 #include "llvm/MC/MCRegisterInfo.h"
     21 #include "llvm/MC/MCSubtargetInfo.h"
     22 #include "llvm/Support/ErrorHandling.h"
     23 #include "llvm/Support/FormattedStream.h"
     24 #include "llvm/Support/TargetRegistry.h"
     25 
     26 using namespace llvm;
     27 
     28 #define GET_INSTRINFO_MC_DESC
     29 #include "XCoreGenInstrInfo.inc"
     30 
     31 #define GET_SUBTARGETINFO_MC_DESC
     32 #include "XCoreGenSubtargetInfo.inc"
     33 
     34 #define GET_REGINFO_MC_DESC
     35 #include "XCoreGenRegisterInfo.inc"
     36 
     37 static MCInstrInfo *createXCoreMCInstrInfo() {
     38   MCInstrInfo *X = new MCInstrInfo();
     39   InitXCoreMCInstrInfo(X);
     40   return X;
     41 }
     42 
     43 static MCRegisterInfo *createXCoreMCRegisterInfo(StringRef TT) {
     44   MCRegisterInfo *X = new MCRegisterInfo();
     45   InitXCoreMCRegisterInfo(X, XCore::LR);
     46   return X;
     47 }
     48 
     49 static MCSubtargetInfo *createXCoreMCSubtargetInfo(StringRef TT, StringRef CPU,
     50                                                    StringRef FS) {
     51   MCSubtargetInfo *X = new MCSubtargetInfo();
     52   InitXCoreMCSubtargetInfo(X, TT, CPU, FS);
     53   return X;
     54 }
     55 
     56 static MCAsmInfo *createXCoreMCAsmInfo(const MCRegisterInfo &MRI,
     57                                        StringRef TT) {
     58   MCAsmInfo *MAI = new XCoreMCAsmInfo(TT);
     59 
     60   // Initial state of the frame pointer is SP.
     61   MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(nullptr, XCore::SP, 0);
     62   MAI->addInitialFrameState(Inst);
     63 
     64   return MAI;
     65 }
     66 
     67 static MCCodeGenInfo *createXCoreMCCodeGenInfo(StringRef TT, Reloc::Model RM,
     68                                                CodeModel::Model CM,
     69                                                CodeGenOpt::Level OL) {
     70   MCCodeGenInfo *X = new MCCodeGenInfo();
     71   if (RM == Reloc::Default) {
     72     RM = Reloc::Static;
     73   }
     74   if (CM == CodeModel::Default) {
     75     CM = CodeModel::Small;
     76   }
     77   if (CM != CodeModel::Small && CM != CodeModel::Large)
     78     report_fatal_error("Target only supports CodeModel Small or Large");
     79 
     80   X->InitMCCodeGenInfo(RM, CM, OL);
     81   return X;
     82 }
     83 
     84 static MCInstPrinter *createXCoreMCInstPrinter(const Target &T,
     85                                                unsigned SyntaxVariant,
     86                                                const MCAsmInfo &MAI,
     87                                                const MCInstrInfo &MII,
     88                                                const MCRegisterInfo &MRI,
     89                                                const MCSubtargetInfo &STI) {
     90   return new XCoreInstPrinter(MAI, MII, MRI);
     91 }
     92 
     93 XCoreTargetStreamer::XCoreTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
     94 XCoreTargetStreamer::~XCoreTargetStreamer() {}
     95 
     96 namespace {
     97 
     98 class XCoreTargetAsmStreamer : public XCoreTargetStreamer {
     99   formatted_raw_ostream &OS;
    100 public:
    101   XCoreTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS);
    102   virtual void emitCCTopData(StringRef Name) override;
    103   virtual void emitCCTopFunction(StringRef Name) override;
    104   virtual void emitCCBottomData(StringRef Name) override;
    105   virtual void emitCCBottomFunction(StringRef Name) override;
    106 };
    107 
    108 XCoreTargetAsmStreamer::XCoreTargetAsmStreamer(MCStreamer &S,
    109                                                formatted_raw_ostream &OS)
    110     : XCoreTargetStreamer(S), OS(OS) {}
    111 
    112 void XCoreTargetAsmStreamer::emitCCTopData(StringRef Name) {
    113   OS << "\t.cc_top " << Name << ".data," << Name << '\n';
    114 }
    115 
    116 void XCoreTargetAsmStreamer::emitCCTopFunction(StringRef Name) {
    117   OS << "\t.cc_top " << Name << ".function," << Name << '\n';
    118 }
    119 
    120 void XCoreTargetAsmStreamer::emitCCBottomData(StringRef Name) {
    121   OS << "\t.cc_bottom " << Name << ".data\n";
    122 }
    123 
    124 void XCoreTargetAsmStreamer::emitCCBottomFunction(StringRef Name) {
    125   OS << "\t.cc_bottom " << Name << ".function\n";
    126 }
    127 }
    128 
    129 static MCStreamer *
    130 createXCoreMCAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
    131                          bool isVerboseAsm, bool useDwarfDirectory,
    132                          MCInstPrinter *InstPrint, MCCodeEmitter *CE,
    133                          MCAsmBackend *TAB, bool ShowInst) {
    134   MCStreamer *S = llvm::createAsmStreamer(
    135       Ctx, OS, isVerboseAsm, useDwarfDirectory, InstPrint, CE, TAB, ShowInst);
    136   new XCoreTargetAsmStreamer(*S, OS);
    137   return S;
    138 }
    139 
    140 // Force static initialization.
    141 extern "C" void LLVMInitializeXCoreTargetMC() {
    142   // Register the MC asm info.
    143   RegisterMCAsmInfoFn X(TheXCoreTarget, createXCoreMCAsmInfo);
    144 
    145   // Register the MC codegen info.
    146   TargetRegistry::RegisterMCCodeGenInfo(TheXCoreTarget,
    147                                         createXCoreMCCodeGenInfo);
    148 
    149   // Register the MC instruction info.
    150   TargetRegistry::RegisterMCInstrInfo(TheXCoreTarget, createXCoreMCInstrInfo);
    151 
    152   // Register the MC register info.
    153   TargetRegistry::RegisterMCRegInfo(TheXCoreTarget, createXCoreMCRegisterInfo);
    154 
    155   // Register the MC subtarget info.
    156   TargetRegistry::RegisterMCSubtargetInfo(TheXCoreTarget,
    157                                           createXCoreMCSubtargetInfo);
    158 
    159   // Register the MCInstPrinter
    160   TargetRegistry::RegisterMCInstPrinter(TheXCoreTarget,
    161                                         createXCoreMCInstPrinter);
    162 
    163   TargetRegistry::RegisterAsmStreamer(TheXCoreTarget, createXCoreMCAsmStreamer);
    164 }
    165