1 //===---- MipsABIInfo.cpp - Information about MIPS ABI's ------------------===// 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 #include "MipsABIInfo.h" 11 #include "MipsRegisterInfo.h" 12 #include "llvm/ADT/StringRef.h" 13 #include "llvm/ADT/StringSwitch.h" 14 #include "llvm/MC/MCTargetOptions.h" 15 16 using namespace llvm; 17 18 namespace { 19 static const MCPhysReg O32IntRegs[4] = {Mips::A0, Mips::A1, Mips::A2, Mips::A3}; 20 21 static const MCPhysReg Mips64IntRegs[8] = { 22 Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64, 23 Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64}; 24 } 25 26 ArrayRef<MCPhysReg> MipsABIInfo::GetByValArgRegs() const { 27 if (IsO32()) 28 return makeArrayRef(O32IntRegs); 29 if (IsN32() || IsN64()) 30 return makeArrayRef(Mips64IntRegs); 31 llvm_unreachable("Unhandled ABI"); 32 } 33 34 ArrayRef<MCPhysReg> MipsABIInfo::GetVarArgRegs() const { 35 if (IsO32()) 36 return makeArrayRef(O32IntRegs); 37 if (IsN32() || IsN64()) 38 return makeArrayRef(Mips64IntRegs); 39 llvm_unreachable("Unhandled ABI"); 40 } 41 42 unsigned MipsABIInfo::GetCalleeAllocdArgSizeInBytes(CallingConv::ID CC) const { 43 if (IsO32()) 44 return CC != CallingConv::Fast ? 16 : 0; 45 if (IsN32() || IsN64()) 46 return 0; 47 llvm_unreachable("Unhandled ABI"); 48 } 49 50 MipsABIInfo MipsABIInfo::computeTargetABI(const Triple &TT, StringRef CPU, 51 const MCTargetOptions &Options) { 52 if (Options.getABIName().startswith("o32")) 53 return MipsABIInfo::O32(); 54 else if (Options.getABIName().startswith("n32")) 55 return MipsABIInfo::N32(); 56 else if (Options.getABIName().startswith("n64")) 57 return MipsABIInfo::N64(); 58 else if (!Options.getABIName().empty()) 59 llvm_unreachable("Unknown ABI option for MIPS"); 60 61 if (TT.getArch() == Triple::mips64 || TT.getArch() == Triple::mips64el) 62 return MipsABIInfo::N64(); 63 return MipsABIInfo::O32(); 64 } 65 66 unsigned MipsABIInfo::GetStackPtr() const { 67 return ArePtrs64bit() ? Mips::SP_64 : Mips::SP; 68 } 69 70 unsigned MipsABIInfo::GetFramePtr() const { 71 return ArePtrs64bit() ? Mips::FP_64 : Mips::FP; 72 } 73 74 unsigned MipsABIInfo::GetBasePtr() const { 75 return ArePtrs64bit() ? Mips::S7_64 : Mips::S7; 76 } 77 78 unsigned MipsABIInfo::GetGlobalPtr() const { 79 return ArePtrs64bit() ? Mips::GP_64 : Mips::GP; 80 } 81 82 unsigned MipsABIInfo::GetNullPtr() const { 83 return ArePtrs64bit() ? Mips::ZERO_64 : Mips::ZERO; 84 } 85 86 unsigned MipsABIInfo::GetZeroReg() const { 87 return AreGprs64bit() ? Mips::ZERO_64 : Mips::ZERO; 88 } 89 90 unsigned MipsABIInfo::GetPtrAdduOp() const { 91 return ArePtrs64bit() ? Mips::DADDu : Mips::ADDu; 92 } 93 94 unsigned MipsABIInfo::GetPtrAddiuOp() const { 95 return ArePtrs64bit() ? Mips::DADDiu : Mips::ADDiu; 96 } 97 98 unsigned MipsABIInfo::GetPtrSubuOp() const { 99 return ArePtrs64bit() ? Mips::DSUBu : Mips::SUBu; 100 } 101 102 unsigned MipsABIInfo::GetPtrAndOp() const { 103 return ArePtrs64bit() ? Mips::AND64 : Mips::AND; 104 } 105 106 unsigned MipsABIInfo::GetGPRMoveOp() const { 107 return ArePtrs64bit() ? Mips::OR64 : Mips::OR; 108 } 109 110 unsigned MipsABIInfo::GetEhDataReg(unsigned I) const { 111 static const unsigned EhDataReg[] = { 112 Mips::A0, Mips::A1, Mips::A2, Mips::A3 113 }; 114 static const unsigned EhDataReg64[] = { 115 Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64 116 }; 117 118 return IsN64() ? EhDataReg64[I] : EhDataReg[I]; 119 } 120 121
