1 //===- PPCInstrInfo.h - PowerPC Instruction Information ---------*- 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 //===----------------------------------------------------------------------===//
10 // This file contains the PowerPC implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #ifndef POWERPC32_INSTRUCTIONINFO_H
15 #define POWERPC32_INSTRUCTIONINFO_H
18 #include "llvm/Target/TargetInstrInfo.h"
19 #include "PPCRegisterInfo.h"
21 #define GET_INSTRINFO_HEADER
22 #include "PPCGenInstrInfo.inc"
26 /// PPCII - This namespace holds all of the PowerPC target-specific
27 /// per-instruction flags. These must match the corresponding definitions in
28 /// PPC.td and PPCInstrFormats.td.
31 // PPC970 Instruction Flags. These flags describe the characteristics of the
32 // PowerPC 970 (aka G5) dispatch groups and how they are formed out of
33 // raw machine instructions.
35 /// PPC970_First - This instruction starts a new dispatch group, so it will
36 /// always be the first one in the group.
39 /// PPC970_Single - This instruction starts a new dispatch group and
40 /// terminates it, so it will be the sole instruction in the group.
43 /// PPC970_Cracked - This instruction is cracked into two pieces, requiring
44 /// two dispatch pipes to be available to issue.
47 /// PPC970_Mask/Shift - This is a bitmask that selects the pipeline type that
48 /// an instruction is issued to.
50 PPC970_Mask = 0x07 << PPC970_Shift
53 /// These are the various PPC970 execution unit pipelines. Each instruction
55 PPC970_Pseudo = 0 << PPC970_Shift, // Pseudo instruction
56 PPC970_FXU = 1 << PPC970_Shift, // Fixed Point (aka Integer/ALU) Unit
57 PPC970_LSU = 2 << PPC970_Shift, // Load Store Unit
58 PPC970_FPU = 3 << PPC970_Shift, // Floating Point Unit
59 PPC970_CRU = 4 << PPC970_Shift, // Control Register Unit
60 PPC970_VALU = 5 << PPC970_Shift, // Vector ALU
61 PPC970_VPERM = 6 << PPC970_Shift, // Vector Permute Unit
62 PPC970_BRU = 7 << PPC970_Shift // Branch Unit
64 } // end namespace PPCII
67 class PPCInstrInfo : public PPCGenInstrInfo {
69 const PPCRegisterInfo RI;
71 bool StoreRegToStackSlot(MachineFunction &MF,
72 unsigned SrcReg, bool isKill, int FrameIdx,
73 const TargetRegisterClass *RC,
74 SmallVectorImpl<MachineInstr*> &NewMIs) const;
75 void LoadRegFromStackSlot(MachineFunction &MF, DebugLoc DL,
76 unsigned DestReg, int FrameIdx,
77 const TargetRegisterClass *RC,
78 SmallVectorImpl<MachineInstr*> &NewMIs) const;
80 explicit PPCInstrInfo(PPCTargetMachine &TM);
82 /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As
83 /// such, whenever a client has an instance of instruction info, it should
84 /// always be able to get register info as well (through this method).
86 virtual const PPCRegisterInfo &getRegisterInfo() const { return RI; }
88 ScheduleHazardRecognizer *
89 CreateTargetHazardRecognizer(const TargetMachine *TM,
90 const ScheduleDAG *DAG) const;
92 unsigned isLoadFromStackSlot(const MachineInstr *MI,
93 int &FrameIndex) const;
94 unsigned isStoreToStackSlot(const MachineInstr *MI,
95 int &FrameIndex) const;
97 // commuteInstruction - We can commute rlwimi instructions, but only if the
98 // rotate amt is zero. We also have to munge the immediates a bit.
99 virtual MachineInstr *commuteInstruction(MachineInstr *MI, bool NewMI) const;
101 virtual void insertNoop(MachineBasicBlock &MBB,
102 MachineBasicBlock::iterator MI) const;
106 virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
107 MachineBasicBlock *&FBB,
108 SmallVectorImpl<MachineOperand> &Cond,
109 bool AllowModify) const;
110 virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const;
111 virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
112 MachineBasicBlock *FBB,
113 const SmallVectorImpl<MachineOperand> &Cond,
115 virtual void copyPhysReg(MachineBasicBlock &MBB,
116 MachineBasicBlock::iterator I, DebugLoc DL,
117 unsigned DestReg, unsigned SrcReg,
120 virtual void storeRegToStackSlot(MachineBasicBlock &MBB,
121 MachineBasicBlock::iterator MBBI,
122 unsigned SrcReg, bool isKill, int FrameIndex,
123 const TargetRegisterClass *RC,
124 const TargetRegisterInfo *TRI) const;
126 virtual void loadRegFromStackSlot(MachineBasicBlock &MBB,
127 MachineBasicBlock::iterator MBBI,
128 unsigned DestReg, int FrameIndex,
129 const TargetRegisterClass *RC,
130 const TargetRegisterInfo *TRI) const;
132 virtual MachineInstr *emitFrameIndexDebugValue(MachineFunction &MF,
139 bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const;
141 /// GetInstSize - Return the number of bytes of code the specified
142 /// instruction may be. This returns the maximum number of bytes.
144 virtual unsigned GetInstSizeInBytes(const MachineInstr *MI) const;