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 #include "MCTargetDesc/AVRMCTargetDesc.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 42 const AVRInstrInfo *getInstrInfo() const override { return &InstrInfo; } 43 const TargetFrameLowering *getFrameLowering() const override { 44 return &FrameLowering; 45 } 46 const AVRTargetLowering *getTargetLowering() const override { 47 return &TLInfo; 48 } 49 const AVRSelectionDAGInfo *getSelectionDAGInfo() const override { 50 return &TSInfo; 51 } 52 const AVRRegisterInfo *getRegisterInfo() const override { 53 return &InstrInfo.getRegisterInfo(); 54 } 55 56 /// Parses a subtarget feature string, setting appropriate options. 57 /// \note Definition of function is auto generated by `tblgen`. 58 void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS); 59 60 AVRSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS, 61 const TargetMachine &TM); 62 63 // Subtarget feature getters. 64 // See AVR.td for details. 65 bool hasSRAM() const { return m_hasSRAM; } 66 bool hasJMPCALL() const { return m_hasJMPCALL; } 67 bool hasIJMPCALL() const { return m_hasIJMPCALL; } 68 bool hasEIJMPCALL() const { return m_hasEIJMPCALL; } 69 bool hasADDSUBIW() const { return m_hasADDSUBIW; } 70 bool hasSmallStack() const { return m_hasSmallStack; } 71 bool hasMOVW() const { return m_hasMOVW; } 72 bool hasLPM() const { return m_hasLPM; } 73 bool hasLPMX() const { return m_hasLPMX; } 74 bool hasELPM() const { return m_hasELPM; } 75 bool hasELPMX() const { return m_hasELPMX; } 76 bool hasPROGMEM() const { return m_hasPROGMEM; } 77 bool hasSPM() const { return m_hasSPM; } 78 bool hasSPMX() const { return m_hasSPMX; } 79 bool hasDES() const { return m_hasDES; } 80 bool supportsRMW() const { return m_supportsRMW; } 81 bool supportsMultiplication() const { return m_supportsMultiplication; } 82 bool hasBREAK() const { return m_hasBREAK; } 83 bool hasTinyEncoding() const { return m_hasTinyEncoding; } 84 bool hasMemMappedGPR() const { return m_hasMemMappedGPR; } 85 86 uint8_t getIORegisterOffset() const { return hasMemMappedGPR() ? 0x20 : 0x0; } 87 88 /// Gets the ELF architecture for the e_flags field 89 /// of an ELF object file. 90 unsigned getELFArch() const { 91 assert(ELFArch != 0 && 92 "every device must have an associate ELF architecture"); 93 return ELFArch; 94 } 95 96 /// Get I/O register addresses. 97 int getIORegRAMPZ() const { return hasELPM() ? 0x3b : -1; } 98 int getIORegEIND() const { return hasEIJMPCALL() ? 0x3c : -1; } 99 int getIORegSPL() const { return 0x3d; } 100 int getIORegSPH() const { return hasSmallStack() ? -1 : 0x3e; } 101 int getIORegSREG() const { return 0x3f; } 102 103 /// Get GPR aliases. 104 int getRegTmpIndex() const { return hasTinyEncoding() ? 16 : 0; } 105 int getRegZeroIndex() const { return hasTinyEncoding() ? 17 : 1; } 106 107 Register getTmpRegister() const { 108 return hasTinyEncoding() ? AVR::R16 : AVR::R0; 109 } 110 Register getZeroRegister() const { 111 return hasTinyEncoding() ? AVR::R17 : AVR::R1; 112 } 113 114 private: 115 /// The ELF e_flags architecture. 116 unsigned ELFArch = 0; 117 118 // Subtarget feature settings 119 // See AVR.td for details. 120 bool m_hasSRAM = false; 121 bool m_hasJMPCALL = false; 122 bool m_hasIJMPCALL = false; 123 bool m_hasEIJMPCALL = false; 124 bool m_hasADDSUBIW = false; 125 bool m_hasSmallStack = false; 126 bool m_hasMOVW = false; 127 bool m_hasLPM = false; 128 bool m_hasLPMX = false; 129 bool m_hasELPM = false; 130 bool m_hasELPMX = false; 131 bool m_hasPROGMEM = false; 132 bool m_hasSPM = false; 133 bool m_hasSPMX = false; 134 bool m_hasDES = false; 135 bool m_supportsRMW = false; 136 bool m_supportsMultiplication = false; 137 bool m_hasBREAK = false; 138 bool m_hasTinyEncoding = false; 139 bool m_hasMemMappedGPR = false; 140 141 // Dummy member, used by FeatureSet's. We cannot have a SubtargetFeature with 142 // no variable, so we instead bind pseudo features to this variable. 143 bool m_FeatureSetDummy = false; 144 145 AVRInstrInfo InstrInfo; 146 AVRFrameLowering FrameLowering; 147 AVRTargetLowering TLInfo; 148 AVRSelectionDAGInfo TSInfo; 149 }; 150 151 } // end namespace llvm 152 153 #endif // LLVM_AVR_SUBTARGET_H 154