1 //===-- R600InstrInfo.h - R600 Instruction Info Interface -------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief Interface definition for R600InstrInfo
13 //===----------------------------------------------------------------------===//
15 #ifndef R600INSTRUCTIONINFO_H_
16 #define R600INSTRUCTIONINFO_H_
18 #include "AMDGPUInstrInfo.h"
19 #include "R600Defines.h"
20 #include "R600RegisterInfo.h"
25 class AMDGPUTargetMachine;
28 class MachineFunction;
30 class MachineInstrBuilder;
32 class R600InstrInfo : public AMDGPUInstrInfo {
34 const R600RegisterInfo RI;
36 int getBranchInstr(const MachineOperand &op) const;
37 std::vector<std::pair<int, unsigned> >
38 ExtractSrcs(MachineInstr *MI, const DenseMap<unsigned, unsigned> &PV, unsigned &ConstCount) const;
42 ALU_VEC_012_SCL_210 = 0,
50 explicit R600InstrInfo(const AMDGPUSubtarget &st);
52 const R600RegisterInfo &getRegisterInfo() const override;
53 void copyPhysReg(MachineBasicBlock &MBB,
54 MachineBasicBlock::iterator MI, DebugLoc DL,
55 unsigned DestReg, unsigned SrcReg,
56 bool KillSrc) const override;
57 bool isLegalToSplitMBBAt(MachineBasicBlock &MBB,
58 MachineBasicBlock::iterator MBBI) const override;
60 bool isTrig(const MachineInstr &MI) const;
61 bool isPlaceHolderOpcode(unsigned opcode) const;
62 bool isReductionOp(unsigned opcode) const;
63 bool isCubeOp(unsigned opcode) const;
65 /// \returns true if this \p Opcode represents an ALU instruction.
66 bool isALUInstr(unsigned Opcode) const;
67 bool hasInstrModifiers(unsigned Opcode) const;
68 bool isLDSInstr(unsigned Opcode) const;
69 bool isLDSNoRetInstr(unsigned Opcode) const;
70 bool isLDSRetInstr(unsigned Opcode) const;
72 /// \returns true if this \p Opcode represents an ALU instruction or an
73 /// instruction that will be lowered in ExpandSpecialInstrs Pass.
74 bool canBeConsideredALU(const MachineInstr *MI) const;
76 bool isTransOnly(unsigned Opcode) const;
77 bool isTransOnly(const MachineInstr *MI) const;
78 bool isVectorOnly(unsigned Opcode) const;
79 bool isVectorOnly(const MachineInstr *MI) const;
80 bool isExport(unsigned Opcode) const;
82 bool usesVertexCache(unsigned Opcode) const;
83 bool usesVertexCache(const MachineInstr *MI) const;
84 bool usesTextureCache(unsigned Opcode) const;
85 bool usesTextureCache(const MachineInstr *MI) const;
87 bool mustBeLastInClause(unsigned Opcode) const;
88 bool usesAddressRegister(MachineInstr *MI) const;
89 bool definesAddressRegister(MachineInstr *MI) const;
90 bool readsLDSSrcReg(const MachineInstr *MI) const;
92 /// \returns The operand index for the given source number. Legal values
93 /// for SrcNum are 0, 1, and 2.
94 int getSrcIdx(unsigned Opcode, unsigned SrcNum) const;
95 /// \returns The operand Index for the Sel operand given an index to one
96 /// of the instruction's src operands.
97 int getSelIdx(unsigned Opcode, unsigned SrcIdx) const;
99 /// \returns a pair for each src of an ALU instructions.
100 /// The first member of a pair is the register id.
101 /// If register is ALU_CONST, second member is SEL.
102 /// If register is ALU_LITERAL, second member is IMM.
103 /// Otherwise, second member value is undefined.
104 SmallVector<std::pair<MachineOperand *, int64_t>, 3>
105 getSrcs(MachineInstr *MI) const;
107 unsigned isLegalUpTo(
108 const std::vector<std::vector<std::pair<int, unsigned> > > &IGSrcs,
109 const std::vector<R600InstrInfo::BankSwizzle> &Swz,
110 const std::vector<std::pair<int, unsigned> > &TransSrcs,
111 R600InstrInfo::BankSwizzle TransSwz) const;
113 bool FindSwizzleForVectorSlot(
114 const std::vector<std::vector<std::pair<int, unsigned> > > &IGSrcs,
115 std::vector<R600InstrInfo::BankSwizzle> &SwzCandidate,
116 const std::vector<std::pair<int, unsigned> > &TransSrcs,
117 R600InstrInfo::BankSwizzle TransSwz) const;
119 /// Given the order VEC_012 < VEC_021 < VEC_120 < VEC_102 < VEC_201 < VEC_210
120 /// returns true and the first (in lexical order) BankSwizzle affectation
121 /// starting from the one already provided in the Instruction Group MIs that
122 /// fits Read Port limitations in BS if available. Otherwise returns false
123 /// and undefined content in BS.
124 /// isLastAluTrans should be set if the last Alu of MIs will be executed on
125 /// Trans ALU. In this case, ValidTSwizzle returns the BankSwizzle value to
126 /// apply to the last instruction.
127 /// PV holds GPR to PV registers in the Instruction Group MIs.
128 bool fitsReadPortLimitations(const std::vector<MachineInstr *> &MIs,
129 const DenseMap<unsigned, unsigned> &PV,
130 std::vector<BankSwizzle> &BS,
131 bool isLastAluTrans) const;
133 /// An instruction group can only access 2 channel pair (either [XY] or [ZW])
134 /// from KCache bank on R700+. This function check if MI set in input meet
136 bool fitsConstReadLimitations(const std::vector<MachineInstr *> &) const;
137 /// Same but using const index set instead of MI set.
138 bool fitsConstReadLimitations(const std::vector<unsigned>&) const;
140 /// \brief Vector instructions are instructions that must fill all
141 /// instruction slots within an instruction group.
142 bool isVector(const MachineInstr &MI) const;
144 unsigned getIEQOpcode() const override;
145 bool isMov(unsigned Opcode) const override;
147 DFAPacketizer *CreateTargetScheduleState(const TargetMachine *TM,
148 const ScheduleDAG *DAG) const override;
150 bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
152 bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, MachineBasicBlock *&FBB,
153 SmallVectorImpl<MachineOperand> &Cond, bool AllowModify) const override;
155 unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, MachineBasicBlock *FBB, const SmallVectorImpl<MachineOperand> &Cond, DebugLoc DL) const override;
157 unsigned RemoveBranch(MachineBasicBlock &MBB) const override;
159 bool isPredicated(const MachineInstr *MI) const override;
161 bool isPredicable(MachineInstr *MI) const override;
164 isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCyles,
165 const BranchProbability &Probability) const override;
167 bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCyles,
168 unsigned ExtraPredCycles,
169 const BranchProbability &Probability) const override ;
172 isProfitableToIfCvt(MachineBasicBlock &TMBB,
173 unsigned NumTCycles, unsigned ExtraTCycles,
174 MachineBasicBlock &FMBB,
175 unsigned NumFCycles, unsigned ExtraFCycles,
176 const BranchProbability &Probability) const override;
178 bool DefinesPredicate(MachineInstr *MI,
179 std::vector<MachineOperand> &Pred) const override;
181 bool SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1,
182 const SmallVectorImpl<MachineOperand> &Pred2) const override;
184 bool isProfitableToUnpredicate(MachineBasicBlock &TMBB,
185 MachineBasicBlock &FMBB) const override;
187 bool PredicateInstruction(MachineInstr *MI,
188 const SmallVectorImpl<MachineOperand> &Pred) const override;
190 unsigned int getPredicationCost(const MachineInstr *) const override;
192 unsigned int getInstrLatency(const InstrItineraryData *ItinData,
193 const MachineInstr *MI,
194 unsigned *PredCost = nullptr) const override;
196 int getInstrLatency(const InstrItineraryData *ItinData,
197 SDNode *Node) const override { return 1;}
199 /// \brief Reserve the registers that may be accesed using indirect addressing.
200 void reserveIndirectRegisters(BitVector &Reserved,
201 const MachineFunction &MF) const;
203 unsigned calculateIndirectAddress(unsigned RegIndex,
204 unsigned Channel) const override;
206 const TargetRegisterClass *getIndirectAddrRegClass() const override;
208 MachineInstrBuilder buildIndirectWrite(MachineBasicBlock *MBB,
209 MachineBasicBlock::iterator I,
210 unsigned ValueReg, unsigned Address,
211 unsigned OffsetReg) const override;
213 MachineInstrBuilder buildIndirectRead(MachineBasicBlock *MBB,
214 MachineBasicBlock::iterator I,
215 unsigned ValueReg, unsigned Address,
216 unsigned OffsetReg) const override;
218 unsigned getMaxAlusPerClause() const;
220 ///buildDefaultInstruction - This function returns a MachineInstr with
221 /// all the instruction modifiers initialized to their default values.
222 /// You can use this function to avoid manually specifying each instruction
223 /// modifier operand when building a new instruction.
225 /// \returns a MachineInstr with all the instruction modifiers initialized
226 /// to their default values.
227 MachineInstrBuilder buildDefaultInstruction(MachineBasicBlock &MBB,
228 MachineBasicBlock::iterator I,
232 unsigned Src1Reg = 0) const;
234 MachineInstr *buildSlotOfVectorInstruction(MachineBasicBlock &MBB,
237 unsigned DstReg) const;
239 MachineInstr *buildMovImm(MachineBasicBlock &BB,
240 MachineBasicBlock::iterator I,
244 MachineInstr *buildMovInstr(MachineBasicBlock *MBB,
245 MachineBasicBlock::iterator I,
246 unsigned DstReg, unsigned SrcReg) const override;
248 /// \brief Get the index of Op in the MachineInstr.
250 /// \returns -1 if the Instruction does not contain the specified \p Op.
251 int getOperandIdx(const MachineInstr &MI, unsigned Op) const;
253 /// \brief Get the index of \p Op for the given Opcode.
255 /// \returns -1 if the Instruction does not contain the specified \p Op.
256 int getOperandIdx(unsigned Opcode, unsigned Op) const;
258 /// \brief Helper function for setting instruction flag values.
259 void setImmOperand(MachineInstr *MI, unsigned Op, int64_t Imm) const;
261 /// \returns true if this instruction has an operand for storing target flags.
262 bool hasFlagOperand(const MachineInstr &MI) const;
264 ///\brief Add one of the MO_FLAG* flags to the specified \p Operand.
265 void addFlag(MachineInstr *MI, unsigned Operand, unsigned Flag) const;
267 ///\brief Determine if the specified \p Flag is set on this \p Operand.
268 bool isFlagSet(const MachineInstr &MI, unsigned Operand, unsigned Flag) const;
270 /// \param SrcIdx The register source to set the flag on (e.g src0, src1, src2)
271 /// \param Flag The flag being set.
273 /// \returns the operand containing the flags for this instruction.
274 MachineOperand &getFlagOp(MachineInstr *MI, unsigned SrcIdx = 0,
275 unsigned Flag = 0) const;
277 /// \brief Clear the specified flag on the instruction.
278 void clearFlag(MachineInstr *MI, unsigned Operand, unsigned Flag) const;
283 int getLDSNoRetOp(uint16_t Opcode);
285 } //End namespace AMDGPU
287 } // End llvm namespace
289 #endif // R600INSTRINFO_H_