1 //===---- MipsABIInfo.h - Information about MIPS ABI's --------------------===// 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 #ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H 10 #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSABIINFO_H 11 12 #include "llvm/ADT/Triple.h" 13 #include "llvm/IR/CallingConv.h" 14 #include "llvm/MC/MCRegisterInfo.h" 15 16 namespace llvm { 17 18 template <typename T> class ArrayRef; 19 class MCTargetOptions; 20 class StringRef; 21 class TargetRegisterClass; 22 23 class MipsABIInfo { 24 public: 25 enum class ABI { Unknown, O32, N32, N64 }; 26 27 protected: 28 ABI ThisABI; 29 30 public: MipsABIInfo(ABI ThisABI)31 MipsABIInfo(ABI ThisABI) : ThisABI(ThisABI) {} 32 Unknown()33 static MipsABIInfo Unknown() { return MipsABIInfo(ABI::Unknown); } O32()34 static MipsABIInfo O32() { return MipsABIInfo(ABI::O32); } N32()35 static MipsABIInfo N32() { return MipsABIInfo(ABI::N32); } N64()36 static MipsABIInfo N64() { return MipsABIInfo(ABI::N64); } 37 static MipsABIInfo computeTargetABI(const Triple &TT, StringRef CPU, 38 const MCTargetOptions &Options); 39 IsKnown()40 bool IsKnown() const { return ThisABI != ABI::Unknown; } IsO32()41 bool IsO32() const { return ThisABI == ABI::O32; } IsN32()42 bool IsN32() const { return ThisABI == ABI::N32; } IsN64()43 bool IsN64() const { return ThisABI == ABI::N64; } GetEnumValue()44 ABI GetEnumValue() const { return ThisABI; } 45 46 /// The registers to use for byval arguments. 47 ArrayRef<MCPhysReg> GetByValArgRegs() const; 48 49 /// The registers to use for the variable argument list. 50 ArrayRef<MCPhysReg> GetVarArgRegs() const; 51 52 /// Obtain the size of the area allocated by the callee for arguments. 53 /// CallingConv::FastCall affects the value for O32. 54 unsigned GetCalleeAllocdArgSizeInBytes(CallingConv::ID CC) const; 55 56 /// Ordering of ABI's 57 /// MipsGenSubtargetInfo.inc will use this to resolve conflicts when given 58 /// multiple ABI options. 59 bool operator<(const MipsABIInfo Other) const { 60 return ThisABI < Other.GetEnumValue(); 61 } 62 63 unsigned GetStackPtr() const; 64 unsigned GetFramePtr() const; 65 unsigned GetBasePtr() const; 66 unsigned GetGlobalPtr() const; 67 unsigned GetNullPtr() const; 68 unsigned GetZeroReg() const; 69 unsigned GetPtrAdduOp() const; 70 unsigned GetPtrAddiuOp() const; 71 unsigned GetPtrSubuOp() const; 72 unsigned GetPtrAndOp() const; 73 unsigned GetGPRMoveOp() const; ArePtrs64bit()74 inline bool ArePtrs64bit() const { return IsN64(); } AreGprs64bit()75 inline bool AreGprs64bit() const { return IsN32() || IsN64(); } 76 77 unsigned GetEhDataReg(unsigned I) const; 78 }; 79 } 80 81 #endif 82