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      1 //===-- AVRSubtarget.h - Define Subtarget for the AVR -----------*- 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 declares the AVR specific subclass of TargetSubtargetInfo.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #ifndef LLVM_AVR_SUBTARGET_H
     15 #define LLVM_AVR_SUBTARGET_H
     16 
     17 #include "llvm/Target/TargetSubtargetInfo.h"
     18 #include "llvm/IR/DataLayout.h"
     19 #include "llvm/IR/DataLayout.h"
     20 #include "llvm/Target/TargetMachine.h"
     21 
     22 #include "AVRFrameLowering.h"
     23 #include "AVRISelLowering.h"
     24 #include "AVRInstrInfo.h"
     25 #include "AVRSelectionDAGInfo.h"
     26 
     27 #define GET_SUBTARGETINFO_HEADER
     28 #include "AVRGenSubtargetInfo.inc"
     29 
     30 namespace llvm {
     31 
     32 /// A specific AVR target MCU.
     33 class AVRSubtarget : public AVRGenSubtargetInfo {
     34 public:
     35   //! Creates an AVR subtarget.
     36   //! \param TT  The target triple.
     37   //! \param CPU The CPU to target.
     38   //! \param FS  The feature string.
     39   //! \param TM  The target machine.
     40   AVRSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS,
     41                AVRTargetMachine &TM);
     42 
     43   const AVRInstrInfo *getInstrInfo() const override { return &InstrInfo; }
     44   const TargetFrameLowering *getFrameLowering() const override { return &FrameLowering; }
     45   const AVRTargetLowering *getTargetLowering() const override { return &TLInfo; }
     46   const AVRSelectionDAGInfo *getSelectionDAGInfo() const override { return &TSInfo; }
     47   const AVRRegisterInfo *getRegisterInfo() const override { return &InstrInfo.getRegisterInfo(); }
     48 
     49   /// Parses a subtarget feature string, setting appropriate options.
     50   /// \note Definition of function is auto generated by `tblgen`.
     51   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
     52 
     53   // Subtarget feature getters.
     54   // See AVR.td for details.
     55   bool hasSRAM() const { return m_hasSRAM; }
     56   bool hasJMPCALL() const { return m_hasJMPCALL; }
     57   bool hasIJMPCALL() const { return m_hasIJMPCALL; }
     58   bool hasEIJMPCALL() const { return m_hasEIJMPCALL; }
     59   bool hasADDSUBIW() const { return m_hasADDSUBIW; }
     60   bool hasSmallStack() const { return m_hasSmallStack; }
     61   bool hasMOVW() const { return m_hasMOVW; }
     62   bool hasLPM() const { return m_hasLPM; }
     63   bool hasLPMX() const { return m_hasLPMX; }
     64   bool hasELPM() const { return m_hasELPM; }
     65   bool hasELPMX() const { return m_hasELPMX; }
     66   bool hasSPM() const { return m_hasSPM; }
     67   bool hasSPMX() const { return m_hasSPMX; }
     68   bool hasDES() const { return m_hasDES; }
     69   bool supportsRMW() const { return m_supportsRMW; }
     70   bool supportsMultiplication() const { return m_supportsMultiplication; }
     71   bool hasBREAK() const { return m_hasBREAK; }
     72   bool hasTinyEncoding() const { return m_hasTinyEncoding; }
     73 
     74   /// Gets the ELF architecture for the e_flags field
     75   /// of an ELF object file.
     76   unsigned getELFArch() const {
     77     assert(ELFArch != 0 &&
     78            "every device must have an associate ELF architecture");
     79     return ELFArch;
     80   }
     81 
     82 private:
     83   AVRInstrInfo InstrInfo;
     84   AVRFrameLowering FrameLowering;
     85   AVRTargetLowering TLInfo;
     86   AVRSelectionDAGInfo TSInfo;
     87 
     88   // Subtarget feature settings
     89   // See AVR.td for details.
     90   bool m_hasSRAM;
     91   bool m_hasJMPCALL;
     92   bool m_hasIJMPCALL;
     93   bool m_hasEIJMPCALL;
     94   bool m_hasADDSUBIW;
     95   bool m_hasSmallStack;
     96   bool m_hasMOVW;
     97   bool m_hasLPM;
     98   bool m_hasLPMX;
     99   bool m_hasELPM;
    100   bool m_hasELPMX;
    101   bool m_hasSPM;
    102   bool m_hasSPMX;
    103   bool m_hasDES;
    104   bool m_supportsRMW;
    105   bool m_supportsMultiplication;
    106   bool m_hasBREAK;
    107   bool m_hasTinyEncoding;
    108 
    109   /// The ELF e_flags architecture.
    110   unsigned ELFArch;
    111 
    112   // Dummy member, used by FeatureSet's. We cannot have a SubtargetFeature with
    113   // no variable, so we instead bind pseudo features to this variable.
    114   bool m_FeatureSetDummy;
    115 };
    116 
    117 } // end namespace llvm
    118 
    119 #endif // LLVM_AVR_SUBTARGET_H
    120