1 //===-- Mips16InstrInfo.h - Mips16 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 Mips16 implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_MIPS_MIPS16INSTRINFO_H
15 #define LLVM_LIB_TARGET_MIPS_MIPS16INSTRINFO_H
17 #include "Mips16RegisterInfo.h"
18 #include "MipsInstrInfo.h"
22 class Mips16InstrInfo : public MipsInstrInfo {
23 const Mips16RegisterInfo RI;
26 explicit Mips16InstrInfo(const MipsSubtarget &STI);
28 const MipsRegisterInfo &getRegisterInfo() const override;
30 /// isLoadFromStackSlot - If the specified machine instruction is a direct
31 /// load from a stack slot, return the virtual or physical register number of
32 /// the destination along with the FrameIndex of the loaded stack slot. If
33 /// not, return 0. This predicate must return 0 if the instruction has
34 /// any side effects other than loading from the stack slot.
35 unsigned isLoadFromStackSlot(const MachineInstr *MI,
36 int &FrameIndex) const override;
38 /// isStoreToStackSlot - If the specified machine instruction is a direct
39 /// store to a stack slot, return the virtual or physical register number of
40 /// the source reg along with the FrameIndex of the loaded stack slot. If
41 /// not, return 0. This predicate must return 0 if the instruction has
42 /// any side effects other than storing to the stack slot.
43 unsigned isStoreToStackSlot(const MachineInstr *MI,
44 int &FrameIndex) const override;
46 void copyPhysReg(MachineBasicBlock &MBB,
47 MachineBasicBlock::iterator MI, DebugLoc DL,
48 unsigned DestReg, unsigned SrcReg,
49 bool KillSrc) const override;
51 void storeRegToStack(MachineBasicBlock &MBB,
52 MachineBasicBlock::iterator MBBI,
53 unsigned SrcReg, bool isKill, int FrameIndex,
54 const TargetRegisterClass *RC,
55 const TargetRegisterInfo *TRI,
56 int64_t Offset) const override;
58 void loadRegFromStack(MachineBasicBlock &MBB,
59 MachineBasicBlock::iterator MBBI,
60 unsigned DestReg, int FrameIndex,
61 const TargetRegisterClass *RC,
62 const TargetRegisterInfo *TRI,
63 int64_t Offset) const override;
65 bool expandPostRAPseudo(MachineBasicBlock::iterator MI) const override;
67 unsigned getOppositeBranchOpc(unsigned Opc) const override;
69 // Adjust SP by FrameSize bytes. Save RA, S0, S1
70 void makeFrame(unsigned SP, int64_t FrameSize, MachineBasicBlock &MBB,
71 MachineBasicBlock::iterator I) const;
73 // Adjust SP by FrameSize bytes. Restore RA, S0, S1
74 void restoreFrame(unsigned SP, int64_t FrameSize, MachineBasicBlock &MBB,
75 MachineBasicBlock::iterator I) const;
78 /// Adjust SP by Amount bytes.
79 void adjustStackPtr(unsigned SP, int64_t Amount, MachineBasicBlock &MBB,
80 MachineBasicBlock::iterator I) const;
82 /// Emit a series of instructions to load an immediate.
83 // This is to adjust some FrameReg. We return the new register to be used
84 // in place of FrameReg and the adjusted immediate field (&NewImm)
86 unsigned loadImmediate(unsigned FrameReg,
87 int64_t Imm, MachineBasicBlock &MBB,
88 MachineBasicBlock::iterator II, DebugLoc DL,
89 unsigned &NewImm) const;
91 static bool validImmediate(unsigned Opcode, unsigned Reg, int64_t Amount);
93 static bool validSpImm8(int offset) {
94 return ((offset & 7) == 0) && isInt<11>(offset);
98 // build the proper one based on the Imm field
101 const MCInstrDesc& AddiuSpImm(int64_t Imm) const;
104 (MachineBasicBlock &MBB, MachineBasicBlock::iterator I, int64_t Imm) const;
106 unsigned getInlineAsmLength(const char *Str,
107 const MCAsmInfo &MAI) const override;
109 unsigned getAnalyzableBrOpc(unsigned Opc) const override;
111 void ExpandRetRA16(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
114 // Adjust SP by Amount bytes where bytes can be up to 32bit number.
115 void adjustStackPtrBig(unsigned SP, int64_t Amount, MachineBasicBlock &MBB,
116 MachineBasicBlock::iterator I,
117 unsigned Reg1, unsigned Reg2) const;
119 // Adjust SP by Amount bytes where bytes can be up to 32bit number.
120 void adjustStackPtrBigUnrestricted(unsigned SP, int64_t Amount,
121 MachineBasicBlock &MBB,
122 MachineBasicBlock::iterator I) const;