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/CodeGen/TargetSubtargetInfo.h"
18 #include "llvm/IR/DataLayout.h"
19 #include "llvm/Target/TargetMachine.h"
20 
21 #include "AVRFrameLowering.h"
22 #include "AVRISelLowering.h"
23 #include "AVRInstrInfo.h"
24 #include "AVRSelectionDAGInfo.h"
25 
26 #define GET_SUBTARGETINFO_HEADER
27 #include "AVRGenSubtargetInfo.inc"
28 
29 namespace llvm {
30 
31 /// A specific AVR target MCU.
32 class AVRSubtarget : public AVRGenSubtargetInfo {
33 public:
34   //! Creates an AVR subtarget.
35   //! \param TT  The target triple.
36   //! \param CPU The CPU to target.
37   //! \param FS  The feature string.
38   //! \param TM  The target machine.
39   AVRSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS,
40                const AVRTargetMachine &TM);
41 
getInstrInfo()42   const AVRInstrInfo *getInstrInfo() const override { return &InstrInfo; }
getFrameLowering()43   const TargetFrameLowering *getFrameLowering() const override { return &FrameLowering; }
getTargetLowering()44   const AVRTargetLowering *getTargetLowering() const override { return &TLInfo; }
getSelectionDAGInfo()45   const AVRSelectionDAGInfo *getSelectionDAGInfo() const override { return &TSInfo; }
getRegisterInfo()46   const AVRRegisterInfo *getRegisterInfo() const override { return &InstrInfo.getRegisterInfo(); }
47 
48   /// Parses a subtarget feature string, setting appropriate options.
49   /// \note Definition of function is auto generated by `tblgen`.
50   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
51 
52   AVRSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS,
53                                                 const TargetMachine &TM);
54 
55   // Subtarget feature getters.
56   // See AVR.td for details.
hasSRAM()57   bool hasSRAM() const { return m_hasSRAM; }
hasJMPCALL()58   bool hasJMPCALL() const { return m_hasJMPCALL; }
hasIJMPCALL()59   bool hasIJMPCALL() const { return m_hasIJMPCALL; }
hasEIJMPCALL()60   bool hasEIJMPCALL() const { return m_hasEIJMPCALL; }
hasADDSUBIW()61   bool hasADDSUBIW() const { return m_hasADDSUBIW; }
hasSmallStack()62   bool hasSmallStack() const { return m_hasSmallStack; }
hasMOVW()63   bool hasMOVW() const { return m_hasMOVW; }
hasLPM()64   bool hasLPM() const { return m_hasLPM; }
hasLPMX()65   bool hasLPMX() const { return m_hasLPMX; }
hasELPM()66   bool hasELPM() const { return m_hasELPM; }
hasELPMX()67   bool hasELPMX() const { return m_hasELPMX; }
hasSPM()68   bool hasSPM() const { return m_hasSPM; }
hasSPMX()69   bool hasSPMX() const { return m_hasSPMX; }
hasDES()70   bool hasDES() const { return m_hasDES; }
supportsRMW()71   bool supportsRMW() const { return m_supportsRMW; }
supportsMultiplication()72   bool supportsMultiplication() const { return m_supportsMultiplication; }
hasBREAK()73   bool hasBREAK() const { return m_hasBREAK; }
hasTinyEncoding()74   bool hasTinyEncoding() const { return m_hasTinyEncoding; }
75 
76   /// Gets the ELF architecture for the e_flags field
77   /// of an ELF object file.
getELFArch()78   unsigned getELFArch() const {
79     assert(ELFArch != 0 &&
80            "every device must have an associate ELF architecture");
81     return ELFArch;
82   }
83 
84 private:
85   AVRInstrInfo InstrInfo;
86   AVRFrameLowering FrameLowering;
87   AVRTargetLowering TLInfo;
88   AVRSelectionDAGInfo TSInfo;
89 
90   // Subtarget feature settings
91   // See AVR.td for details.
92   bool m_hasSRAM;
93   bool m_hasJMPCALL;
94   bool m_hasIJMPCALL;
95   bool m_hasEIJMPCALL;
96   bool m_hasADDSUBIW;
97   bool m_hasSmallStack;
98   bool m_hasMOVW;
99   bool m_hasLPM;
100   bool m_hasLPMX;
101   bool m_hasELPM;
102   bool m_hasELPMX;
103   bool m_hasSPM;
104   bool m_hasSPMX;
105   bool m_hasDES;
106   bool m_supportsRMW;
107   bool m_supportsMultiplication;
108   bool m_hasBREAK;
109   bool m_hasTinyEncoding;
110 
111   /// The ELF e_flags architecture.
112   unsigned ELFArch;
113 
114   // Dummy member, used by FeatureSet's. We cannot have a SubtargetFeature with
115   // no variable, so we instead bind pseudo features to this variable.
116   bool m_FeatureSetDummy;
117 };
118 
119 } // end namespace llvm
120 
121 #endif // LLVM_AVR_SUBTARGET_H
122