R600/SI: Initialize M0 and emit S_WQM_B64 whenever DS instructions are used
[oota-llvm.git] / lib / Target / R600 / SIInstrInfo.h
1 //===-- SIInstrInfo.h - SI Instruction Info Interface -----------*- 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 /// \file
11 /// \brief Interface definition for SIInstrInfo.
12 //
13 //===----------------------------------------------------------------------===//
14
15
16 #ifndef SIINSTRINFO_H
17 #define SIINSTRINFO_H
18
19 #include "AMDGPUInstrInfo.h"
20 #include "SIRegisterInfo.h"
21
22 namespace llvm {
23
24 class SIInstrInfo : public AMDGPUInstrInfo {
25 private:
26   const SIRegisterInfo RI;
27
28   MachineInstrBuilder buildIndirectIndexLoop(MachineBasicBlock &MBB,
29                                              MachineBasicBlock::iterator I,
30                                              unsigned OffsetVGPR,
31                                              unsigned MovRelOp,
32                                              unsigned Dst,
33                                              unsigned Src0) const;
34   // If you add or remove instructions from this function, you will
35
36 public:
37   explicit SIInstrInfo(AMDGPUTargetMachine &tm);
38
39   const SIRegisterInfo &getRegisterInfo() const;
40
41   virtual void copyPhysReg(MachineBasicBlock &MBB,
42                            MachineBasicBlock::iterator MI, DebugLoc DL,
43                            unsigned DestReg, unsigned SrcReg,
44                            bool KillSrc) const;
45
46   void storeRegToStackSlot(MachineBasicBlock &MBB,
47                            MachineBasicBlock::iterator MI,
48                            unsigned SrcReg, bool isKill, int FrameIndex,
49                            const TargetRegisterClass *RC,
50                            const TargetRegisterInfo *TRI) const;
51
52   void loadRegFromStackSlot(MachineBasicBlock &MBB,
53                             MachineBasicBlock::iterator MI,
54                             unsigned DestReg, int FrameIndex,
55                             const TargetRegisterClass *RC,
56                             const TargetRegisterInfo *TRI) const;
57
58   unsigned commuteOpcode(unsigned Opcode) const;
59
60   virtual MachineInstr *commuteInstruction(MachineInstr *MI,
61                                            bool NewMI=false) const;
62
63   virtual unsigned getIEQOpcode() const {
64     llvm_unreachable("Unimplemented");
65   }
66
67   MachineInstr *buildMovInstr(MachineBasicBlock *MBB,
68                               MachineBasicBlock::iterator I,
69                               unsigned DstReg, unsigned SrcReg) const;
70   virtual bool isMov(unsigned Opcode) const;
71
72   virtual bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const;
73   bool isDS(uint16_t Opcode) const;
74   int isMIMG(uint16_t Opcode) const;
75   int isSMRD(uint16_t Opcode) const;
76   bool isVOP1(uint16_t Opcode) const;
77   bool isVOP2(uint16_t Opcode) const;
78   bool isVOP3(uint16_t Opcode) const;
79   bool isVOPC(uint16_t Opcode) const;
80   bool isInlineConstant(const MachineOperand &MO) const;
81   bool isLiteralConstant(const MachineOperand &MO) const;
82
83   virtual bool verifyInstruction(const MachineInstr *MI,
84                                  StringRef &ErrInfo) const;
85
86   bool isSALUInstr(const MachineInstr &MI) const;
87   static unsigned getVALUOp(const MachineInstr &MI);
88   bool isSALUOpSupportedOnVALU(const MachineInstr &MI) const;
89
90   /// \brief Return the correct register class for \p OpNo.  For target-specific
91   /// instructions, this will return the register class that has been defined
92   /// in tablegen.  For generic instructions, like REG_SEQUENCE it will return
93   /// the register class of its machine operand.
94   /// to infer the correct register class base on the other operands.
95   const TargetRegisterClass *getOpRegClass(const MachineInstr &MI,
96                                            unsigned OpNo) const;\
97
98   /// \returns true if it is legal for the operand at index \p OpNo
99   /// to read a VGPR.
100   bool canReadVGPR(const MachineInstr &MI, unsigned OpNo) const;
101
102   /// \brief Legalize the \p OpIndex operand of this instruction by inserting
103   /// a MOV.  For example:
104   /// ADD_I32_e32 VGPR0, 15
105   /// to
106   /// MOV VGPR1, 15
107   /// ADD_I32_e32 VGPR0, VGPR1
108   ///
109   /// If the operand being legalized is a register, then a COPY will be used
110   /// instead of MOV.
111   void legalizeOpWithMove(MachineInstr *MI, unsigned OpIdx) const;
112
113   /// \brief Legalize all operands in this instruction.  This function may
114   /// create new instruction and insert them before \p MI.
115   void legalizeOperands(MachineInstr *MI) const;
116
117   /// \brief Replace this instruction's opcode with the equivalent VALU
118   /// opcode.  This function will also move the users of \p MI to the
119   /// VALU if necessary.
120   void moveToVALU(MachineInstr &MI) const;
121
122   virtual unsigned calculateIndirectAddress(unsigned RegIndex,
123                                             unsigned Channel) const;
124
125   virtual const TargetRegisterClass *getIndirectAddrRegClass() const;
126
127   virtual MachineInstrBuilder buildIndirectWrite(MachineBasicBlock *MBB,
128                                                  MachineBasicBlock::iterator I,
129                                                  unsigned ValueReg,
130                                                  unsigned Address,
131                                                  unsigned OffsetReg) const;
132
133   virtual MachineInstrBuilder buildIndirectRead(MachineBasicBlock *MBB,
134                                                 MachineBasicBlock::iterator I,
135                                                 unsigned ValueReg,
136                                                 unsigned Address,
137                                                 unsigned OffsetReg) const;
138   void reserveIndirectRegisters(BitVector &Reserved,
139                                 const MachineFunction &MF) const;
140
141   void LoadM0(MachineInstr *MoveRel, MachineBasicBlock::iterator I,
142               unsigned SavReg, unsigned IndexReg) const;
143 };
144
145 namespace AMDGPU {
146
147   int getVOPe64(uint16_t Opcode);
148   int getCommuteRev(uint16_t Opcode);
149   int getCommuteOrig(uint16_t Opcode);
150
151 } // End namespace AMDGPU
152
153 } // End namespace llvm
154
155 namespace SIInstrFlags {
156   enum Flags {
157     // First 4 bits are the instruction encoding
158     VM_CNT = 1 << 0,
159     EXP_CNT = 1 << 1,
160     LGKM_CNT = 1 << 2
161   };
162 }
163
164 #endif //SIINSTRINFO_H