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, unsigned &ConstCount) const;
43 ALU_VEC_012_SCL_210 = 0,
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;
66 bool hasInstrModifiers(unsigned Opcode) const;
67 bool isLDSInstr(unsigned Opcode) const;
69 bool isTransOnly(unsigned Opcode) const;
70 bool isTransOnly(const MachineInstr *MI) const;
72 bool usesVertexCache(unsigned Opcode) const;
73 bool usesVertexCache(const MachineInstr *MI) const;
74 bool usesTextureCache(unsigned Opcode) const;
75 bool usesTextureCache(const MachineInstr *MI) const;
77 bool mustBeLastInClause(unsigned Opcode) const;
79 /// \returns a pair for each src of an ALU instructions.
80 /// The first member of a pair is the register id.
81 /// If register is ALU_CONST, second member is SEL.
82 /// If register is ALU_LITERAL, second member is IMM.
83 /// Otherwise, second member value is undefined.
84 SmallVector<std::pair<MachineOperand *, int64_t>, 3>
85 getSrcs(MachineInstr *MI) const;
88 const std::vector<std::vector<std::pair<int, unsigned> > > &IGSrcs,
89 const std::vector<R600InstrInfo::BankSwizzle> &Swz,
90 unsigned CheckedSize) const;
91 bool recursiveFitsFPLimitation(
92 const std::vector<std::vector<std::pair<int, unsigned> > > &IGSrcs,
93 std::vector<R600InstrInfo::BankSwizzle> &SwzCandidate,
94 unsigned Depth = 0) const;
96 /// Given the order VEC_012 < VEC_021 < VEC_120 < VEC_102 < VEC_201 < VEC_210
97 /// returns true and the first (in lexical order) BankSwizzle affectation
98 /// starting from the one already provided in the Instruction Group MIs that
99 /// fits Read Port limitations in BS if available. Otherwise returns false
100 /// and undefined content in BS.
101 /// PV holds GPR to PV registers in the Instruction Group MIs.
102 bool fitsReadPortLimitations(const std::vector<MachineInstr *> &MIs,
103 const DenseMap<unsigned, unsigned> &PV,
104 std::vector<BankSwizzle> &BS) const;
105 bool fitsConstReadLimitations(const std::vector<unsigned>&) const;
106 bool canBundle(const std::vector<MachineInstr *> &) const;
108 /// \breif Vector instructions are instructions that must fill all
109 /// instruction slots within an instruction group.
110 bool isVector(const MachineInstr &MI) const;
112 virtual MachineInstr * getMovImmInstr(MachineFunction *MF, unsigned DstReg,
115 virtual unsigned getIEQOpcode() const;
116 virtual bool isMov(unsigned Opcode) const;
118 DFAPacketizer *CreateTargetScheduleState(const TargetMachine *TM,
119 const ScheduleDAG *DAG) const;
121 bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const;
123 bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, MachineBasicBlock *&FBB,
124 SmallVectorImpl<MachineOperand> &Cond, bool AllowModify) const;
126 unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, MachineBasicBlock *FBB, const SmallVectorImpl<MachineOperand> &Cond, DebugLoc DL) const;
128 unsigned RemoveBranch(MachineBasicBlock &MBB) const;
130 bool isPredicated(const MachineInstr *MI) const;
132 bool isPredicable(MachineInstr *MI) const;
135 isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCyles,
136 const BranchProbability &Probability) const;
138 bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCyles,
139 unsigned ExtraPredCycles,
140 const BranchProbability &Probability) const ;
143 isProfitableToIfCvt(MachineBasicBlock &TMBB,
144 unsigned NumTCycles, unsigned ExtraTCycles,
145 MachineBasicBlock &FMBB,
146 unsigned NumFCycles, unsigned ExtraFCycles,
147 const BranchProbability &Probability) const;
149 bool DefinesPredicate(MachineInstr *MI,
150 std::vector<MachineOperand> &Pred) const;
152 bool SubsumesPredicate(const SmallVectorImpl<MachineOperand> &Pred1,
153 const SmallVectorImpl<MachineOperand> &Pred2) const;
155 bool isProfitableToUnpredicate(MachineBasicBlock &TMBB,
156 MachineBasicBlock &FMBB) const;
158 bool PredicateInstruction(MachineInstr *MI,
159 const SmallVectorImpl<MachineOperand> &Pred) const;
161 unsigned int getInstrLatency(const InstrItineraryData *ItinData,
162 const MachineInstr *MI,
163 unsigned *PredCost = 0) const;
165 virtual int getInstrLatency(const InstrItineraryData *ItinData,
166 SDNode *Node) const { return 1;}
168 /// \returns a list of all the registers that may be accesed using indirect
170 std::vector<unsigned> getIndirectReservedRegs(const MachineFunction &MF) const;
172 virtual int getIndirectIndexBegin(const MachineFunction &MF) const;
174 virtual int getIndirectIndexEnd(const MachineFunction &MF) const;
177 virtual unsigned calculateIndirectAddress(unsigned RegIndex,
178 unsigned Channel) const;
180 virtual const TargetRegisterClass *getIndirectAddrStoreRegClass(
181 unsigned SourceReg) const;
183 virtual const TargetRegisterClass *getIndirectAddrLoadRegClass() const;
185 virtual MachineInstrBuilder buildIndirectWrite(MachineBasicBlock *MBB,
186 MachineBasicBlock::iterator I,
187 unsigned ValueReg, unsigned Address,
188 unsigned OffsetReg) const;
190 virtual MachineInstrBuilder buildIndirectRead(MachineBasicBlock *MBB,
191 MachineBasicBlock::iterator I,
192 unsigned ValueReg, unsigned Address,
193 unsigned OffsetReg) const;
195 virtual const TargetRegisterClass *getSuperIndirectRegClass() const;
197 unsigned getMaxAlusPerClause() const;
199 ///buildDefaultInstruction - This function returns a MachineInstr with
200 /// all the instruction modifiers initialized to their default values.
201 /// You can use this function to avoid manually specifying each instruction
202 /// modifier operand when building a new instruction.
204 /// \returns a MachineInstr with all the instruction modifiers initialized
205 /// to their default values.
206 MachineInstrBuilder buildDefaultInstruction(MachineBasicBlock &MBB,
207 MachineBasicBlock::iterator I,
211 unsigned Src1Reg = 0) const;
213 MachineInstr *buildSlotOfVectorInstruction(MachineBasicBlock &MBB,
216 unsigned DstReg) const;
218 MachineInstr *buildMovImm(MachineBasicBlock &BB,
219 MachineBasicBlock::iterator I,
223 /// \brief Get the index of Op in the MachineInstr.
225 /// \returns -1 if the Instruction does not contain the specified \p Op.
226 int getOperandIdx(const MachineInstr &MI, unsigned Op) const;
228 /// \brief Get the index of \p Op for the given Opcode.
230 /// \returns -1 if the Instruction does not contain the specified \p Op.
231 int getOperandIdx(unsigned Opcode, unsigned Op) const;
233 /// \brief Helper function for setting instruction flag values.
234 void setImmOperand(MachineInstr *MI, unsigned Op, int64_t Imm) const;
236 /// \returns true if this instruction has an operand for storing target flags.
237 bool hasFlagOperand(const MachineInstr &MI) const;
239 ///\brief Add one of the MO_FLAG* flags to the specified \p Operand.
240 void addFlag(MachineInstr *MI, unsigned Operand, unsigned Flag) const;
242 ///\brief Determine if the specified \p Flag is set on this \p Operand.
243 bool isFlagSet(const MachineInstr &MI, unsigned Operand, unsigned Flag) const;
245 /// \param SrcIdx The register source to set the flag on (e.g src0, src1, src2)
246 /// \param Flag The flag being set.
248 /// \returns the operand containing the flags for this instruction.
249 MachineOperand &getFlagOp(MachineInstr *MI, unsigned SrcIdx = 0,
250 unsigned Flag = 0) const;
252 /// \brief Clear the specified flag on the instruction.
253 void clearFlag(MachineInstr *MI, unsigned Operand, unsigned Flag) const;
256 } // End llvm namespace
258 #endif // R600INSTRINFO_H_