R600/SI: Sub-optimial fix for 64-bit immediates with SALU ops.
[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   unsigned buildExtractSubReg(MachineBasicBlock::iterator MI,
29                               MachineRegisterInfo &MRI,
30                               MachineOperand &SuperReg,
31                               const TargetRegisterClass *SuperRC,
32                               unsigned SubIdx,
33                               const TargetRegisterClass *SubRC) const;
34   MachineOperand buildExtractSubRegOrImm(MachineBasicBlock::iterator MI,
35                                          MachineRegisterInfo &MRI,
36                                          MachineOperand &SuperReg,
37                                          const TargetRegisterClass *SuperRC,
38                                          unsigned SubIdx,
39                                          const TargetRegisterClass *SubRC) const;
40
41   unsigned split64BitImm(SmallVectorImpl<MachineInstr *> &Worklist,
42                          MachineBasicBlock::iterator MI,
43                          MachineRegisterInfo &MRI,
44                          const TargetRegisterClass *RC,
45                          const MachineOperand &Op) const;
46
47   void splitScalar64BitOp(SmallVectorImpl<MachineInstr *> & Worklist,
48                           MachineInstr *Inst, unsigned Opcode) const;
49
50
51 public:
52   explicit SIInstrInfo(AMDGPUTargetMachine &tm);
53
54   const SIRegisterInfo &getRegisterInfo() const {
55     return RI;
56   }
57
58   virtual void copyPhysReg(MachineBasicBlock &MBB,
59                            MachineBasicBlock::iterator MI, DebugLoc DL,
60                            unsigned DestReg, unsigned SrcReg,
61                            bool KillSrc) const;
62
63   void storeRegToStackSlot(MachineBasicBlock &MBB,
64                            MachineBasicBlock::iterator MI,
65                            unsigned SrcReg, bool isKill, int FrameIndex,
66                            const TargetRegisterClass *RC,
67                            const TargetRegisterInfo *TRI) const;
68
69   void loadRegFromStackSlot(MachineBasicBlock &MBB,
70                             MachineBasicBlock::iterator MI,
71                             unsigned DestReg, int FrameIndex,
72                             const TargetRegisterClass *RC,
73                             const TargetRegisterInfo *TRI) const;
74
75   unsigned commuteOpcode(unsigned Opcode) const;
76
77   virtual MachineInstr *commuteInstruction(MachineInstr *MI,
78                                            bool NewMI=false) const;
79
80   virtual unsigned getIEQOpcode() const {
81     llvm_unreachable("Unimplemented");
82   }
83
84   MachineInstr *buildMovInstr(MachineBasicBlock *MBB,
85                               MachineBasicBlock::iterator I,
86                               unsigned DstReg, unsigned SrcReg) const;
87   virtual bool isMov(unsigned Opcode) const;
88
89   virtual bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const;
90   bool isDS(uint16_t Opcode) const;
91   int isMIMG(uint16_t Opcode) const;
92   int isSMRD(uint16_t Opcode) const;
93   bool isVOP1(uint16_t Opcode) const;
94   bool isVOP2(uint16_t Opcode) const;
95   bool isVOP3(uint16_t Opcode) const;
96   bool isVOPC(uint16_t Opcode) const;
97   bool isInlineConstant(const MachineOperand &MO) const;
98   bool isLiteralConstant(const MachineOperand &MO) const;
99
100   virtual bool verifyInstruction(const MachineInstr *MI,
101                                  StringRef &ErrInfo) const;
102
103   bool isSALUInstr(const MachineInstr &MI) const;
104   static unsigned getVALUOp(const MachineInstr &MI);
105
106   bool isSALUOpSupportedOnVALU(const MachineInstr &MI) const;
107
108   /// \brief Return the correct register class for \p OpNo.  For target-specific
109   /// instructions, this will return the register class that has been defined
110   /// in tablegen.  For generic instructions, like REG_SEQUENCE it will return
111   /// the register class of its machine operand.
112   /// to infer the correct register class base on the other operands.
113   const TargetRegisterClass *getOpRegClass(const MachineInstr &MI,
114                                            unsigned OpNo) const;\
115
116   /// \returns true if it is legal for the operand at index \p OpNo
117   /// to read a VGPR.
118   bool canReadVGPR(const MachineInstr &MI, unsigned OpNo) const;
119
120   /// \brief Legalize the \p OpIndex operand of this instruction by inserting
121   /// a MOV.  For example:
122   /// ADD_I32_e32 VGPR0, 15
123   /// to
124   /// MOV VGPR1, 15
125   /// ADD_I32_e32 VGPR0, VGPR1
126   ///
127   /// If the operand being legalized is a register, then a COPY will be used
128   /// instead of MOV.
129   void legalizeOpWithMove(MachineInstr *MI, unsigned OpIdx) const;
130
131   /// \brief Legalize all operands in this instruction.  This function may
132   /// create new instruction and insert them before \p MI.
133   void legalizeOperands(MachineInstr *MI) const;
134
135   /// \brief Replace this instruction's opcode with the equivalent VALU
136   /// opcode.  This function will also move the users of \p MI to the
137   /// VALU if necessary.
138   void moveToVALU(MachineInstr &MI) const;
139
140   virtual unsigned calculateIndirectAddress(unsigned RegIndex,
141                                             unsigned Channel) const;
142
143   virtual const TargetRegisterClass *getIndirectAddrRegClass() const;
144
145   virtual MachineInstrBuilder buildIndirectWrite(MachineBasicBlock *MBB,
146                                                  MachineBasicBlock::iterator I,
147                                                  unsigned ValueReg,
148                                                  unsigned Address,
149                                                  unsigned OffsetReg) const;
150
151   virtual MachineInstrBuilder buildIndirectRead(MachineBasicBlock *MBB,
152                                                 MachineBasicBlock::iterator I,
153                                                 unsigned ValueReg,
154                                                 unsigned Address,
155                                                 unsigned OffsetReg) const;
156   void reserveIndirectRegisters(BitVector &Reserved,
157                                 const MachineFunction &MF) const;
158
159   void LoadM0(MachineInstr *MoveRel, MachineBasicBlock::iterator I,
160               unsigned SavReg, unsigned IndexReg) const;
161 };
162
163 namespace AMDGPU {
164
165   int getVOPe64(uint16_t Opcode);
166   int getCommuteRev(uint16_t Opcode);
167   int getCommuteOrig(uint16_t Opcode);
168
169   const uint64_t RSRC_DATA_FORMAT = 0xf00000000000LL;
170
171
172 } // End namespace AMDGPU
173
174 } // End namespace llvm
175
176 namespace SIInstrFlags {
177   enum Flags {
178     // First 4 bits are the instruction encoding
179     VM_CNT = 1 << 0,
180     EXP_CNT = 1 << 1,
181     LGKM_CNT = 1 << 2
182   };
183 }
184
185 #endif //SIINSTRINFO_H