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;
35 const AMDGPUSubtarget &ST;
37 int getBranchInstr(const MachineOperand &op) const;
38 std::vector<std::pair<int, unsigned> >
39 ExtractSrcs(MachineInstr *MI, const DenseMap<unsigned, unsigned> &PV) const;
51 explicit R600InstrInfo(AMDGPUTargetMachine &tm);
53 const R600RegisterInfo &getRegisterInfo() const;
54 virtual void copyPhysReg(MachineBasicBlock &MBB,
55 MachineBasicBlock::iterator MI, DebugLoc DL,
56 unsigned DestReg, unsigned SrcReg,
59 bool isTrig(const MachineInstr &MI) const;
60 bool isPlaceHolderOpcode(unsigned opcode) const;
61 bool isReductionOp(unsigned opcode) const;
62 bool isCubeOp(unsigned opcode) const;
64 /// \returns true if this \p Opcode represents an ALU instruction.
65 bool isALUInstr(unsigned Opcode) const;
67 bool isTransOnly(unsigned Opcode) const;
68 bool isTransOnly(const MachineInstr *MI) const;
70 bool usesVertexCache(unsigned Opcode) const;
71 bool usesVertexCache(const MachineInstr *MI) const;
72 bool usesTextureCache(unsigned Opcode) const;
73 bool usesTextureCache(const MachineInstr *MI) const;
75 bool mustBeLastInClause(unsigned Opcode) const;
77 /// \returns a pair for each src of an ALU instructions.
78 /// The first member of a pair is the register id.
79 /// If register is ALU_CONST, second member is SEL.
80 /// If register is ALU_LITERAL, second member is IMM.
81 /// Otherwise, second member value is undefined.
82 SmallVector<std::pair<MachineOperand *, int64_t>, 3>
83 getSrcs(MachineInstr *MI) const;
85 /// Given the order VEC_012 < VEC_021 < VEC_120 < VEC_102 < VEC_201 < VEC_210
86 /// returns true and the first (in lexical order) BankSwizzle affectation
87 /// starting from the one already provided in the Instruction Group MIs that
88 /// fits Read Port limitations in BS if available. Otherwise returns false
89 /// and undefined content in BS.
90 /// PV holds GPR to PV registers in the Instruction Group MIs.
91 bool fitsReadPortLimitations(const std::vector<MachineInstr *> &MIs,
92 const DenseMap<unsigned, unsigned> &PV,
93 std::vector<BankSwizzle> &BS) const;
94 bool fitsConstReadLimitations(const std::vector<unsigned>&) const;
95 bool canBundle(const std::vector<MachineInstr *> &) const;
97 /// \breif Vector instructions are instructions that must fill all
98 /// instruction slots within an instruction group.
99 bool isVector(const MachineInstr &MI) const;
101 virtual MachineInstr * getMovImmInstr(MachineFunction *MF, unsigned DstReg,
104 virtual unsigned getIEQOpcode() const;
105 virtual bool isMov(unsigned Opcode) const;
107 DFAPacketizer *CreateTargetScheduleState(const TargetMachine *TM,
108 const ScheduleDAG *DAG) const;
110 bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const;
112 bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, MachineBasicBlock *&FBB,
113 SmallVectorImpl<MachineOperand> &Cond, bool AllowModify) const;
115 unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, MachineBasicBlock *FBB, const SmallVectorImpl<MachineOperand> &Cond, DebugLoc DL) const;
117 unsigned RemoveBranch(MachineBasicBlock &MBB) const;
119 bool isPredicated(const MachineInstr *MI) const;
121 bool isPredicable(MachineInstr *MI) const;
124 isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCyles,
125 const BranchProbability &Probability) const;
127 bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCyles,
128 unsigned ExtraPredCycles,
129 const BranchProbability &Probability) const ;
132 isProfitableToIfCvt(MachineBasicBlock &TMBB,
133 unsigned NumTCycles, unsigned ExtraTCycles,
134 MachineBasicBlock &FMBB,
135 unsigned NumFCycles, unsigned ExtraFCycles,
136 const BranchProbability &Probability) const;
138 bool DefinesPredicate(MachineInstr *MI,
139 std::vector<MachineOperand> &Pred) const;
141 bool SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1,
142 const SmallVectorImpl<MachineOperand> &Pred2) const;
144 bool isProfitableToUnpredicate(MachineBasicBlock &TMBB,
145 MachineBasicBlock &FMBB) const;
147 bool PredicateInstruction(MachineInstr *MI,
148 const SmallVectorImpl<MachineOperand> &Pred) const;
150 unsigned int getInstrLatency(const InstrItineraryData *ItinData,
151 const MachineInstr *MI,
152 unsigned *PredCost = 0) const;
154 virtual int getInstrLatency(const InstrItineraryData *ItinData,
155 SDNode *Node) const { return 1;}
157 /// \returns a list of all the registers that may be accesed using indirect
159 std::vector<unsigned> getIndirectReservedRegs(const MachineFunction &MF) const;
161 virtual int getIndirectIndexBegin(const MachineFunction &MF) const;
163 virtual int getIndirectIndexEnd(const MachineFunction &MF) const;
166 virtual unsigned calculateIndirectAddress(unsigned RegIndex,
167 unsigned Channel) const;
169 virtual const TargetRegisterClass *getIndirectAddrStoreRegClass(
170 unsigned SourceReg) const;
172 virtual const TargetRegisterClass *getIndirectAddrLoadRegClass() const;
174 virtual MachineInstrBuilder buildIndirectWrite(MachineBasicBlock *MBB,
175 MachineBasicBlock::iterator I,
176 unsigned ValueReg, unsigned Address,
177 unsigned OffsetReg) const;
179 virtual MachineInstrBuilder buildIndirectRead(MachineBasicBlock *MBB,
180 MachineBasicBlock::iterator I,
181 unsigned ValueReg, unsigned Address,
182 unsigned OffsetReg) const;
184 virtual const TargetRegisterClass *getSuperIndirectRegClass() const;
186 unsigned getMaxAlusPerClause() const;
188 ///buildDefaultInstruction - This function returns a MachineInstr with
189 /// all the instruction modifiers initialized to their default values.
190 /// You can use this function to avoid manually specifying each instruction
191 /// modifier operand when building a new instruction.
193 /// \returns a MachineInstr with all the instruction modifiers initialized
194 /// to their default values.
195 MachineInstrBuilder buildDefaultInstruction(MachineBasicBlock &MBB,
196 MachineBasicBlock::iterator I,
200 unsigned Src1Reg = 0) const;
202 MachineInstr *buildSlotOfVectorInstruction(MachineBasicBlock &MBB,
205 unsigned DstReg) const;
207 MachineInstr *buildMovImm(MachineBasicBlock &BB,
208 MachineBasicBlock::iterator I,
212 /// \brief Get the index of Op in the MachineInstr.
214 /// \returns -1 if the Instruction does not contain the specified \p Op.
215 int getOperandIdx(const MachineInstr &MI, unsigned Op) const;
217 /// \brief Get the index of \p Op for the given Opcode.
219 /// \returns -1 if the Instruction does not contain the specified \p Op.
220 int getOperandIdx(unsigned Opcode, unsigned Op) const;
222 /// \brief Helper function for setting instruction flag values.
223 void setImmOperand(MachineInstr *MI, unsigned Op, int64_t Imm) const;
225 /// \returns true if this instruction has an operand for storing target flags.
226 bool hasFlagOperand(const MachineInstr &MI) const;
228 ///\brief Add one of the MO_FLAG* flags to the specified \p Operand.
229 void addFlag(MachineInstr *MI, unsigned Operand, unsigned Flag) const;
231 ///\brief Determine if the specified \p Flag is set on this \p Operand.
232 bool isFlagSet(const MachineInstr &MI, unsigned Operand, unsigned Flag) const;
234 /// \param SrcIdx The register source to set the flag on (e.g src0, src1, src2)
235 /// \param Flag The flag being set.
237 /// \returns the operand containing the flags for this instruction.
238 MachineOperand &getFlagOp(MachineInstr *MI, unsigned SrcIdx = 0,
239 unsigned Flag = 0) const;
241 /// \brief Clear the specified flag on the instruction.
242 void clearFlag(MachineInstr *MI, unsigned Operand, unsigned Flag) const;
245 } // End llvm namespace
247 #endif // R600INSTRINFO_H_