1 //===-- MipsBaseInfo.h - Top level definitions for MIPS MC ------*- 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 contains small standalone helper functions and enum definitions for 11 // the Mips target useful for the compiler back-end and the MC libraries. 12 // 13 //===----------------------------------------------------------------------===// 14 #ifndef MIPSBASEINFO_H 15 #define MIPSBASEINFO_H 16 17 #include "MipsFixupKinds.h" 18 #include "MipsMCTargetDesc.h" 19 #include "llvm/MC/MCExpr.h" 20 #include "llvm/Support/DataTypes.h" 21 #include "llvm/Support/ErrorHandling.h" 22 23 namespace llvm { 24 25 /// MipsII - This namespace holds all of the target specific flags that 26 /// instruction info tracks. 27 /// 28 namespace MipsII { 29 /// Target Operand Flag enum. 30 enum TOF { 31 //===------------------------------------------------------------------===// 32 // Mips Specific MachineOperand flags. 33 34 MO_NO_FLAG, 35 36 /// MO_GOT16 - Represents the offset into the global offset table at which 37 /// the address the relocation entry symbol resides during execution. 38 MO_GOT16, 39 MO_GOT, 40 41 /// MO_GOT_CALL - Represents the offset into the global offset table at 42 /// which the address of a call site relocation entry symbol resides 43 /// during execution. This is different from the above since this flag 44 /// can only be present in call instructions. 45 MO_GOT_CALL, 46 47 /// MO_GPREL - Represents the offset from the current gp value to be used 48 /// for the relocatable object file being produced. 49 MO_GPREL, 50 51 /// MO_ABS_HI/LO - Represents the hi or low part of an absolute symbol 52 /// address. 53 MO_ABS_HI, 54 MO_ABS_LO, 55 56 /// MO_TLSGD - Represents the offset into the global offset table at which 57 // the module ID and TSL block offset reside during execution (General 58 // Dynamic TLS). 59 MO_TLSGD, 60 61 /// MO_TLSLDM - Represents the offset into the global offset table at which 62 // the module ID and TSL block offset reside during execution (Local 63 // Dynamic TLS). 64 MO_TLSLDM, 65 MO_DTPREL_HI, 66 MO_DTPREL_LO, 67 68 /// MO_GOTTPREL - Represents the offset from the thread pointer (Initial 69 // Exec TLS). 70 MO_GOTTPREL, 71 72 /// MO_TPREL_HI/LO - Represents the hi and low part of the offset from 73 // the thread pointer (Local Exec TLS). 74 MO_TPREL_HI, 75 MO_TPREL_LO, 76 77 // N32/64 Flags. 78 MO_GPOFF_HI, 79 MO_GPOFF_LO, 80 MO_GOT_DISP, 81 MO_GOT_PAGE, 82 MO_GOT_OFST 83 }; 84 85 enum { 86 //===------------------------------------------------------------------===// 87 // Instruction encodings. These are the standard/most common forms for 88 // Mips instructions. 89 // 90 91 // Pseudo - This represents an instruction that is a pseudo instruction 92 // or one that has not been implemented yet. It is illegal to code generate 93 // it, but tolerated for intermediate implementation stages. 94 Pseudo = 0, 95 96 /// FrmR - This form is for instructions of the format R. 97 FrmR = 1, 98 /// FrmI - This form is for instructions of the format I. 99 FrmI = 2, 100 /// FrmJ - This form is for instructions of the format J. 101 FrmJ = 3, 102 /// FrmFR - This form is for instructions of the format FR. 103 FrmFR = 4, 104 /// FrmFI - This form is for instructions of the format FI. 105 FrmFI = 5, 106 /// FrmOther - This form is for instructions that have no specific format. 107 FrmOther = 6, 108 109 FormMask = 15 110 }; 111 } 112 113 114 /// getMipsRegisterNumbering - Given the enum value for some register, 115 /// return the number that it corresponds to. 116 inline static unsigned getMipsRegisterNumbering(unsigned RegEnum) 117 { 118 switch (RegEnum) { 119 case Mips::ZERO: case Mips::ZERO_64: case Mips::F0: case Mips::D0_64: 120 case Mips::D0: 121 return 0; 122 case Mips::AT: case Mips::AT_64: case Mips::F1: case Mips::D1_64: 123 return 1; 124 case Mips::V0: case Mips::V0_64: case Mips::F2: case Mips::D2_64: 125 case Mips::D1: 126 return 2; 127 case Mips::V1: case Mips::V1_64: case Mips::F3: case Mips::D3_64: 128 return 3; 129 case Mips::A0: case Mips::A0_64: case Mips::F4: case Mips::D4_64: 130 case Mips::D2: 131 return 4; 132 case Mips::A1: case Mips::A1_64: case Mips::F5: case Mips::D5_64: 133 return 5; 134 case Mips::A2: case Mips::A2_64: case Mips::F6: case Mips::D6_64: 135 case Mips::D3: 136 return 6; 137 case Mips::A3: case Mips::A3_64: case Mips::F7: case Mips::D7_64: 138 return 7; 139 case Mips::T0: case Mips::T0_64: case Mips::F8: case Mips::D8_64: 140 case Mips::D4: 141 return 8; 142 case Mips::T1: case Mips::T1_64: case Mips::F9: case Mips::D9_64: 143 return 9; 144 case Mips::T2: case Mips::T2_64: case Mips::F10: case Mips::D10_64: 145 case Mips::D5: 146 return 10; 147 case Mips::T3: case Mips::T3_64: case Mips::F11: case Mips::D11_64: 148 return 11; 149 case Mips::T4: case Mips::T4_64: case Mips::F12: case Mips::D12_64: 150 case Mips::D6: 151 return 12; 152 case Mips::T5: case Mips::T5_64: case Mips::F13: case Mips::D13_64: 153 return 13; 154 case Mips::T6: case Mips::T6_64: case Mips::F14: case Mips::D14_64: 155 case Mips::D7: 156 return 14; 157 case Mips::T7: case Mips::T7_64: case Mips::F15: case Mips::D15_64: 158 return 15; 159 case Mips::S0: case Mips::S0_64: case Mips::F16: case Mips::D16_64: 160 case Mips::D8: 161 return 16; 162 case Mips::S1: case Mips::S1_64: case Mips::F17: case Mips::D17_64: 163 return 17; 164 case Mips::S2: case Mips::S2_64: case Mips::F18: case Mips::D18_64: 165 case Mips::D9: 166 return 18; 167 case Mips::S3: case Mips::S3_64: case Mips::F19: case Mips::D19_64: 168 return 19; 169 case Mips::S4: case Mips::S4_64: case Mips::F20: case Mips::D20_64: 170 case Mips::D10: 171 return 20; 172 case Mips::S5: case Mips::S5_64: case Mips::F21: case Mips::D21_64: 173 return 21; 174 case Mips::S6: case Mips::S6_64: case Mips::F22: case Mips::D22_64: 175 case Mips::D11: 176 return 22; 177 case Mips::S7: case Mips::S7_64: case Mips::F23: case Mips::D23_64: 178 return 23; 179 case Mips::T8: case Mips::T8_64: case Mips::F24: case Mips::D24_64: 180 case Mips::D12: 181 return 24; 182 case Mips::T9: case Mips::T9_64: case Mips::F25: case Mips::D25_64: 183 return 25; 184 case Mips::K0: case Mips::K0_64: case Mips::F26: case Mips::D26_64: 185 case Mips::D13: 186 return 26; 187 case Mips::K1: case Mips::K1_64: case Mips::F27: case Mips::D27_64: 188 return 27; 189 case Mips::GP: case Mips::GP_64: case Mips::F28: case Mips::D28_64: 190 case Mips::D14: 191 return 28; 192 case Mips::SP: case Mips::SP_64: case Mips::F29: case Mips::D29_64: 193 case Mips::HWR29: 194 return 29; 195 case Mips::FP: case Mips::FP_64: case Mips::F30: case Mips::D30_64: 196 case Mips::D15: 197 return 30; 198 case Mips::RA: case Mips::RA_64: case Mips::F31: case Mips::D31_64: 199 return 31; 200 default: llvm_unreachable("Unknown register number!"); 201 } 202 } 203 204 inline static std::pair<const MCSymbolRefExpr*, int64_t> 205 MipsGetSymAndOffset(const MCFixup &Fixup) { 206 MCFixupKind FixupKind = Fixup.getKind(); 207 208 if ((FixupKind < FirstTargetFixupKind) || 209 (FixupKind >= MCFixupKind(Mips::LastTargetFixupKind))) 210 return std::make_pair((const MCSymbolRefExpr*)0, (int64_t)0); 211 212 const MCExpr *Expr = Fixup.getValue(); 213 MCExpr::ExprKind Kind = Expr->getKind(); 214 215 if (Kind == MCExpr::Binary) { 216 const MCBinaryExpr *BE = static_cast<const MCBinaryExpr*>(Expr); 217 const MCExpr *LHS = BE->getLHS(); 218 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS()); 219 220 if ((LHS->getKind() != MCExpr::SymbolRef) || !CE) 221 return std::make_pair((const MCSymbolRefExpr*)0, (int64_t)0); 222 223 return std::make_pair(cast<MCSymbolRefExpr>(LHS), CE->getValue()); 224 } 225 226 if (Kind != MCExpr::SymbolRef) 227 return std::make_pair((const MCSymbolRefExpr*)0, (int64_t)0); 228 229 return std::make_pair(cast<MCSymbolRefExpr>(Expr), 0); 230 } 231 } 232 233 #endif 234
