1 //===-- AVRSubtarget.h - Define Subtarget for the AVR -----------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file declares the AVR specific subclass of TargetSubtargetInfo.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_AVR_SUBTARGET_H
14 #define LLVM_AVR_SUBTARGET_H
15 
16 #include "llvm/CodeGen/TargetSubtargetInfo.h"
17 #include "llvm/IR/DataLayout.h"
18 #include "llvm/Target/TargetMachine.h"
19 
20 #include "AVRFrameLowering.h"
21 #include "AVRISelLowering.h"
22 #include "AVRInstrInfo.h"
23 #include "AVRSelectionDAGInfo.h"
24 
25 #define GET_SUBTARGETINFO_HEADER
26 #include "AVRGenSubtargetInfo.inc"
27 
28 namespace llvm {
29 
30 /// A specific AVR target MCU.
31 class AVRSubtarget : public AVRGenSubtargetInfo {
32 public:
33   //! Creates an AVR subtarget.
34   //! \param TT  The target triple.
35   //! \param CPU The CPU to target.
36   //! \param FS  The feature string.
37   //! \param TM  The target machine.
38   AVRSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS,
39                const AVRTargetMachine &TM);
40 
41   const AVRInstrInfo *getInstrInfo() const override { return &InstrInfo; }
42   const TargetFrameLowering *getFrameLowering() const override { return &FrameLowering; }
43   const AVRTargetLowering *getTargetLowering() const override { return &TLInfo; }
44   const AVRSelectionDAGInfo *getSelectionDAGInfo() const override { return &TSInfo; }
45   const AVRRegisterInfo *getRegisterInfo() const override { return &InstrInfo.getRegisterInfo(); }
46 
47   /// Parses a subtarget feature string, setting appropriate options.
48   /// \note Definition of function is auto generated by `tblgen`.
49   void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS);
50 
51   AVRSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS,
52                                                 const TargetMachine &TM);
53 
54   // Subtarget feature getters.
55   // See AVR.td for details.
56   bool hasSRAM() const { return m_hasSRAM; }
57   bool hasJMPCALL() const { return m_hasJMPCALL; }
58   bool hasIJMPCALL() const { return m_hasIJMPCALL; }
59   bool hasEIJMPCALL() const { return m_hasEIJMPCALL; }
60   bool hasADDSUBIW() const { return m_hasADDSUBIW; }
61   bool hasSmallStack() const { return m_hasSmallStack; }
62   bool hasMOVW() const { return m_hasMOVW; }
63   bool hasLPM() const { return m_hasLPM; }
64   bool hasLPMX() const { return m_hasLPMX; }
65   bool hasELPM() const { return m_hasELPM; }
66   bool hasELPMX() const { return m_hasELPMX; }
67   bool hasSPM() const { return m_hasSPM; }
68   bool hasSPMX() const { return m_hasSPMX; }
69   bool hasDES() const { return m_hasDES; }
70   bool supportsRMW() const { return m_supportsRMW; }
71   bool supportsMultiplication() const { return m_supportsMultiplication; }
72   bool hasBREAK() const { return m_hasBREAK; }
73   bool hasTinyEncoding() const { return m_hasTinyEncoding; }
74   bool hasMemMappedGPR() const { return m_hasMemMappedGPR; }
75 
76   uint8_t getIORegisterOffset() const { return hasMemMappedGPR() ? 0x20 : 0x0; }
77 
78   /// Gets the ELF architecture for the e_flags field
79   /// of an ELF object file.
80   unsigned getELFArch() const {
81     assert(ELFArch != 0 &&
82            "every device must have an associate ELF architecture");
83     return ELFArch;
84   }
85 
86 private:
87 
88   /// The ELF e_flags architecture.
89   unsigned ELFArch;
90 
91   // Subtarget feature settings
92   // See AVR.td for details.
93   bool m_hasSRAM;
94   bool m_hasJMPCALL;
95   bool m_hasIJMPCALL;
96   bool m_hasEIJMPCALL;
97   bool m_hasADDSUBIW;
98   bool m_hasSmallStack;
99   bool m_hasMOVW;
100   bool m_hasLPM;
101   bool m_hasLPMX;
102   bool m_hasELPM;
103   bool m_hasELPMX;
104   bool m_hasSPM;
105   bool m_hasSPMX;
106   bool m_hasDES;
107   bool m_supportsRMW;
108   bool m_supportsMultiplication;
109   bool m_hasBREAK;
110   bool m_hasTinyEncoding;
111   bool m_hasMemMappedGPR;
112 
113   // Dummy member, used by FeatureSet's. We cannot have a SubtargetFeature with
114   // no variable, so we instead bind pseudo features to this variable.
115   bool m_FeatureSetDummy;
116 
117   AVRInstrInfo InstrInfo;
118   AVRFrameLowering FrameLowering;
119   AVRTargetLowering TLInfo;
120   AVRSelectionDAGInfo TSInfo;
121 };
122 
123 } // end namespace llvm
124 
125 #endif // LLVM_AVR_SUBTARGET_H
126