1 //===-- R600InstrInfo.h - R600 Instruction Info Interface -------*- 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 /// \file 10 /// Interface definition for R600InstrInfo 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_AMDGPU_R600INSTRINFO_H 15 #define LLVM_LIB_TARGET_AMDGPU_R600INSTRINFO_H 16 17 #include "R600RegisterInfo.h" 18 #include "llvm/CodeGen/TargetInstrInfo.h" 19 20 #define GET_INSTRINFO_HEADER 21 #include "R600GenInstrInfo.inc" 22 23 namespace llvm { 24 25 namespace R600InstrFlags { 26 enum : uint64_t { 27 REGISTER_STORE = UINT64_C(1) << 62, 28 REGISTER_LOAD = UINT64_C(1) << 63 29 }; 30 } 31 32 class DFAPacketizer; 33 class MachineFunction; 34 class MachineInstr; 35 class MachineInstrBuilder; 36 class R600Subtarget; 37 38 class R600InstrInfo final : public R600GenInstrInfo { 39 private: 40 const R600RegisterInfo RI; 41 const R600Subtarget &ST; 42 43 std::vector<std::pair<int, unsigned>> 44 ExtractSrcs(MachineInstr &MI, const DenseMap<unsigned, unsigned> &PV, 45 unsigned &ConstCount) const; 46 47 MachineInstrBuilder buildIndirectRead(MachineBasicBlock *MBB, 48 MachineBasicBlock::iterator I, 49 unsigned ValueReg, unsigned Address, 50 unsigned OffsetReg, 51 unsigned AddrChan) const; 52 53 MachineInstrBuilder buildIndirectWrite(MachineBasicBlock *MBB, 54 MachineBasicBlock::iterator I, 55 unsigned ValueReg, unsigned Address, 56 unsigned OffsetReg, 57 unsigned AddrChan) const; 58 public: 59 enum BankSwizzle { 60 ALU_VEC_012_SCL_210 = 0, 61 ALU_VEC_021_SCL_122, 62 ALU_VEC_120_SCL_212, 63 ALU_VEC_102_SCL_221, 64 ALU_VEC_201, 65 ALU_VEC_210 66 }; 67 68 explicit R600InstrInfo(const R600Subtarget &); 69 70 const R600RegisterInfo &getRegisterInfo() const { 71 return RI; 72 } 73 74 void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, 75 const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg, 76 bool KillSrc) const override; 77 bool isLegalToSplitMBBAt(MachineBasicBlock &MBB, 78 MachineBasicBlock::iterator MBBI) const override; 79 80 bool isReductionOp(unsigned opcode) const; 81 bool isCubeOp(unsigned opcode) const; 82 83 /// \returns true if this \p Opcode represents an ALU instruction. 84 bool isALUInstr(unsigned Opcode) const; 85 bool hasInstrModifiers(unsigned Opcode) const; 86 bool isLDSInstr(unsigned Opcode) const; 87 bool isLDSRetInstr(unsigned Opcode) const; 88 89 /// \returns true if this \p Opcode represents an ALU instruction or an 90 /// instruction that will be lowered in ExpandSpecialInstrs Pass. 91 bool canBeConsideredALU(const MachineInstr &MI) const; 92 93 bool isTransOnly(unsigned Opcode) const; 94 bool isTransOnly(const MachineInstr &MI) const; 95 bool isVectorOnly(unsigned Opcode) const; 96 bool isVectorOnly(const MachineInstr &MI) const; 97 bool isExport(unsigned Opcode) const; 98 99 bool usesVertexCache(unsigned Opcode) const; 100 bool usesVertexCache(const MachineInstr &MI) const; 101 bool usesTextureCache(unsigned Opcode) const; 102 bool usesTextureCache(const MachineInstr &MI) const; 103 104 bool mustBeLastInClause(unsigned Opcode) const; 105 bool usesAddressRegister(MachineInstr &MI) const; 106 bool definesAddressRegister(MachineInstr &MI) const; 107 bool readsLDSSrcReg(const MachineInstr &MI) const; 108 109 /// \returns The operand Index for the Sel operand given an index to one 110 /// of the instruction's src operands. 111 int getSelIdx(unsigned Opcode, unsigned SrcIdx) const; 112 113 /// \returns a pair for each src of an ALU instructions. 114 /// The first member of a pair is the register id. 115 /// If register is ALU_CONST, second member is SEL. 116 /// If register is ALU_LITERAL, second member is IMM. 117 /// Otherwise, second member value is undefined. 118 SmallVector<std::pair<MachineOperand *, int64_t>, 3> 119 getSrcs(MachineInstr &MI) const; 120 121 unsigned isLegalUpTo( 122 const std::vector<std::vector<std::pair<int, unsigned> > > &IGSrcs, 123 const std::vector<R600InstrInfo::BankSwizzle> &Swz, 124 const std::vector<std::pair<int, unsigned> > &TransSrcs, 125 R600InstrInfo::BankSwizzle TransSwz) const; 126 127 bool FindSwizzleForVectorSlot( 128 const std::vector<std::vector<std::pair<int, unsigned> > > &IGSrcs, 129 std::vector<R600InstrInfo::BankSwizzle> &SwzCandidate, 130 const std::vector<std::pair<int, unsigned> > &TransSrcs, 131 R600InstrInfo::BankSwizzle TransSwz) const; 132 133 /// Given the order VEC_012 < VEC_021 < VEC_120 < VEC_102 < VEC_201 < VEC_210 134 /// returns true and the first (in lexical order) BankSwizzle affectation 135 /// starting from the one already provided in the Instruction Group MIs that 136 /// fits Read Port limitations in BS if available. Otherwise returns false 137 /// and undefined content in BS. 138 /// isLastAluTrans should be set if the last Alu of MIs will be executed on 139 /// Trans ALU. In this case, ValidTSwizzle returns the BankSwizzle value to 140 /// apply to the last instruction. 141 /// PV holds GPR to PV registers in the Instruction Group MIs. 142 bool fitsReadPortLimitations(const std::vector<MachineInstr *> &MIs, 143 const DenseMap<unsigned, unsigned> &PV, 144 std::vector<BankSwizzle> &BS, 145 bool isLastAluTrans) const; 146 147 /// An instruction group can only access 2 channel pair (either [XY] or [ZW]) 148 /// from KCache bank on R700+. This function check if MI set in input meet 149 /// this limitations 150 bool fitsConstReadLimitations(const std::vector<MachineInstr *> &) const; 151 /// Same but using const index set instead of MI set. 152 bool fitsConstReadLimitations(const std::vector<unsigned>&) const; 153 154 /// Vector instructions are instructions that must fill all 155 /// instruction slots within an instruction group. 156 bool isVector(const MachineInstr &MI) const; 157 158 bool isMov(unsigned Opcode) const; 159 160 DFAPacketizer * 161 CreateTargetScheduleState(const TargetSubtargetInfo &) const override; 162 163 bool reverseBranchCondition( 164 SmallVectorImpl<MachineOperand> &Cond) const override; 165 166 bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, 167 MachineBasicBlock *&FBB, 168 SmallVectorImpl<MachineOperand> &Cond, 169 bool AllowModify) const override; 170 171 unsigned insertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, 172 MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond, 173 const DebugLoc &DL, 174 int *BytesAdded = nullptr) const override; 175 176 unsigned removeBranch(MachineBasicBlock &MBB, 177 int *BytesRemoved = nullptr) const override; 178 179 bool isPredicated(const MachineInstr &MI) const override; 180 181 bool isPredicable(const MachineInstr &MI) const override; 182 183 bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles, 184 BranchProbability Probability) const override; 185 186 bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCycles, 187 unsigned ExtraPredCycles, 188 BranchProbability Probability) const override ; 189 190 bool isProfitableToIfCvt(MachineBasicBlock &TMBB, 191 unsigned NumTCycles, unsigned ExtraTCycles, 192 MachineBasicBlock &FMBB, 193 unsigned NumFCycles, unsigned ExtraFCycles, 194 BranchProbability Probability) const override; 195 196 bool ClobbersPredicate(MachineInstr &MI, std::vector<MachineOperand> &Pred, 197 bool SkipDead) const override; 198 199 bool isProfitableToUnpredicate(MachineBasicBlock &TMBB, 200 MachineBasicBlock &FMBB) const override; 201 202 bool PredicateInstruction(MachineInstr &MI, 203 ArrayRef<MachineOperand> Pred) const override; 204 205 unsigned int getPredicationCost(const MachineInstr &) const override; 206 207 unsigned int getInstrLatency(const InstrItineraryData *ItinData, 208 const MachineInstr &MI, 209 unsigned *PredCost = nullptr) const override; 210 211 bool expandPostRAPseudo(MachineInstr &MI) const override; 212 213 /// Reserve the registers that may be accessed using indirect addressing. 214 void reserveIndirectRegisters(BitVector &Reserved, 215 const MachineFunction &MF, 216 const R600RegisterInfo &TRI) const; 217 218 /// Calculate the "Indirect Address" for the given \p RegIndex and 219 /// \p Channel 220 /// 221 /// We model indirect addressing using a virtual address space that can be 222 /// accessed with loads and stores. The "Indirect Address" is the memory 223 /// address in this virtual address space that maps to the given \p RegIndex 224 /// and \p Channel. 225 unsigned calculateIndirectAddress(unsigned RegIndex, unsigned Channel) const; 226 227 228 /// \returns The register class to be used for loading and storing values 229 /// from an "Indirect Address" . 230 const TargetRegisterClass *getIndirectAddrRegClass() const; 231 232 /// \returns the smallest register index that will be accessed by an indirect 233 /// read or write or -1 if indirect addressing is not used by this program. 234 int getIndirectIndexBegin(const MachineFunction &MF) const; 235 236 /// \returns the largest register index that will be accessed by an indirect 237 /// read or write or -1 if indirect addressing is not used by this program. 238 int getIndirectIndexEnd(const MachineFunction &MF) const; 239 240 /// Build instruction(s) for an indirect register write. 241 /// 242 /// \returns The instruction that performs the indirect register write 243 MachineInstrBuilder buildIndirectWrite(MachineBasicBlock *MBB, 244 MachineBasicBlock::iterator I, 245 unsigned ValueReg, unsigned Address, 246 unsigned OffsetReg) const; 247 248 /// Build instruction(s) for an indirect register read. 249 /// 250 /// \returns The instruction that performs the indirect register read 251 MachineInstrBuilder buildIndirectRead(MachineBasicBlock *MBB, 252 MachineBasicBlock::iterator I, 253 unsigned ValueReg, unsigned Address, 254 unsigned OffsetReg) const; 255 256 unsigned getMaxAlusPerClause() const; 257 258 /// buildDefaultInstruction - This function returns a MachineInstr with all 259 /// the instruction modifiers initialized to their default values. You can 260 /// use this function to avoid manually specifying each instruction modifier 261 /// operand when building a new instruction. 262 /// 263 /// \returns a MachineInstr with all the instruction modifiers initialized 264 /// to their default values. 265 MachineInstrBuilder buildDefaultInstruction(MachineBasicBlock &MBB, 266 MachineBasicBlock::iterator I, 267 unsigned Opcode, 268 unsigned DstReg, 269 unsigned Src0Reg, 270 unsigned Src1Reg = 0) const; 271 272 MachineInstr *buildSlotOfVectorInstruction(MachineBasicBlock &MBB, 273 MachineInstr *MI, 274 unsigned Slot, 275 unsigned DstReg) const; 276 277 MachineInstr *buildMovImm(MachineBasicBlock &BB, 278 MachineBasicBlock::iterator I, 279 unsigned DstReg, 280 uint64_t Imm) const; 281 282 MachineInstr *buildMovInstr(MachineBasicBlock *MBB, 283 MachineBasicBlock::iterator I, 284 unsigned DstReg, unsigned SrcReg) const; 285 286 /// Get the index of Op in the MachineInstr. 287 /// 288 /// \returns -1 if the Instruction does not contain the specified \p Op. 289 int getOperandIdx(const MachineInstr &MI, unsigned Op) const; 290 291 /// Get the index of \p Op for the given Opcode. 292 /// 293 /// \returns -1 if the Instruction does not contain the specified \p Op. 294 int getOperandIdx(unsigned Opcode, unsigned Op) const; 295 296 /// Helper function for setting instruction flag values. 297 void setImmOperand(MachineInstr &MI, unsigned Op, int64_t Imm) const; 298 299 ///Add one of the MO_FLAG* flags to the specified \p Operand. 300 void addFlag(MachineInstr &MI, unsigned Operand, unsigned Flag) const; 301 302 ///Determine if the specified \p Flag is set on this \p Operand. 303 bool isFlagSet(const MachineInstr &MI, unsigned Operand, unsigned Flag) const; 304 305 /// \param SrcIdx The register source to set the flag on (e.g src0, src1, src2) 306 /// \param Flag The flag being set. 307 /// 308 /// \returns the operand containing the flags for this instruction. 309 MachineOperand &getFlagOp(MachineInstr &MI, unsigned SrcIdx = 0, 310 unsigned Flag = 0) const; 311 312 /// Clear the specified flag on the instruction. 313 void clearFlag(MachineInstr &MI, unsigned Operand, unsigned Flag) const; 314 315 // Helper functions that check the opcode for status information 316 bool isRegisterStore(const MachineInstr &MI) const { 317 return get(MI.getOpcode()).TSFlags & R600InstrFlags::REGISTER_STORE; 318 } 319 320 bool isRegisterLoad(const MachineInstr &MI) const { 321 return get(MI.getOpcode()).TSFlags & R600InstrFlags::REGISTER_LOAD; 322 } 323 }; 324 325 namespace R600 { 326 327 int getLDSNoRetOp(uint16_t Opcode); 328 329 } //End namespace AMDGPU 330 331 } // End llvm namespace 332 333 #endif 334