1 //===- AArch64RegisterBankInfo -----------------------------------*- 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 declares the targeting of the RegisterBankInfo class for AArch64.
11 /// \todo This should be generated by TableGen.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64REGISTERBANKINFO_H
15 #define LLVM_LIB_TARGET_AARCH64_AARCH64REGISTERBANKINFO_H
17 #include "llvm/CodeGen/GlobalISel/RegisterBankInfo.h"
19 #define GET_REGBANK_DECLARATIONS
20 #include "AArch64GenRegisterBank.inc"
24 class TargetRegisterInfo;
26 class AArch64GenRegisterBankInfo : public RegisterBankInfo {
29 enum PartialMappingIdx {
38 PMI_FirstGPR = PMI_GPR32,
39 PMI_LastGPR = PMI_GPR64,
40 PMI_FirstFPR = PMI_FPR32,
41 PMI_LastFPR = PMI_FPR512,
42 PMI_Min = PMI_FirstFPR,
45 static RegisterBankInfo::PartialMapping PartMappings[];
46 static RegisterBankInfo::ValueMapping ValMappings[];
47 static PartialMappingIdx BankIDToCopyMapIdx[];
49 enum ValueMappingIdx {
53 DistanceBetweenRegBanks = 3,
54 FirstCrossRegCpyIdx = 22,
55 LastCrossRegCpyIdx = 34,
56 DistanceBetweenCrossRegCpy = 2
59 static bool checkPartialMap(unsigned Idx, unsigned ValStartIdx,
60 unsigned ValLength, const RegisterBank &RB);
61 static bool checkValueMapImpl(unsigned Idx, unsigned FirstInBank,
62 unsigned Size, unsigned Offset);
63 static bool checkPartialMappingIdx(PartialMappingIdx FirstAlias,
64 PartialMappingIdx LastAlias,
65 ArrayRef<PartialMappingIdx> Order);
67 static unsigned getRegBankBaseIdxOffset(unsigned RBIdx, unsigned Size);
69 /// Get the pointer to the ValueMapping representing the RegisterBank
70 /// at \p RBIdx with a size of \p Size.
72 /// The returned mapping works for instructions with the same kind of
73 /// operands for up to 3 operands.
75 /// \pre \p RBIdx != PartialMappingIdx::None
76 static const RegisterBankInfo::ValueMapping *
77 getValueMapping(PartialMappingIdx RBIdx, unsigned Size);
79 /// Get the pointer to the ValueMapping of the operands of a copy
80 /// instruction from the \p SrcBankID register bank to the \p DstBankID
81 /// register bank with a size of \p Size.
82 static const RegisterBankInfo::ValueMapping *
83 getCopyMapping(unsigned DstBankID, unsigned SrcBankID, unsigned Size);
85 #define GET_TARGET_REGBANK_CLASS
86 #include "AArch64GenRegisterBank.inc"
89 /// This class provides the information for the target register banks.
90 class AArch64RegisterBankInfo final : public AArch64GenRegisterBankInfo {
91 /// See RegisterBankInfo::applyMapping.
92 void applyMappingImpl(const OperandsMapper &OpdMapper) const override;
94 /// Get an instruction mapping where all the operands map to
95 /// the same register bank and have similar size.
97 /// \pre MI.getNumOperands() <= 3
99 /// \return An InstructionMappings with a statically allocated
101 static InstructionMapping
102 getSameKindOfOperandsMapping(const MachineInstr &MI);
105 AArch64RegisterBankInfo(const TargetRegisterInfo &TRI);
107 unsigned copyCost(const RegisterBank &A, const RegisterBank &B,
108 unsigned Size) const override;
111 getRegBankFromRegClass(const TargetRegisterClass &RC) const override;
114 getInstrAlternativeMappings(const MachineInstr &MI) const override;
116 InstructionMapping getInstrMapping(const MachineInstr &MI) const override;
118 } // End llvm namespace.