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Diffstat (limited to 'contrib/llvm/lib/Target/MBlaze/MBlazeInstrInfo.h')
| -rw-r--r-- | contrib/llvm/lib/Target/MBlaze/MBlazeInstrInfo.h | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/MBlaze/MBlazeInstrInfo.h b/contrib/llvm/lib/Target/MBlaze/MBlazeInstrInfo.h new file mode 100644 index 0000000..b3dba0e --- /dev/null +++ b/contrib/llvm/lib/Target/MBlaze/MBlazeInstrInfo.h @@ -0,0 +1,226 @@ +//===- MBlazeInstrInfo.h - MBlaze Instruction Information -------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains the MBlaze implementation of the TargetInstrInfo class. +// +//===----------------------------------------------------------------------===// + +#ifndef MBLAZEINSTRUCTIONINFO_H +#define MBLAZEINSTRUCTIONINFO_H + +#include "MBlaze.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Target/TargetInstrInfo.h" +#include "MBlazeRegisterInfo.h" + +namespace llvm { + +namespace MBlaze { + + // MBlaze Branch Codes + enum FPBranchCode { + BRANCH_F, + BRANCH_T, + BRANCH_FL, + BRANCH_TL, + BRANCH_INVALID + }; + + // MBlaze Condition Codes + enum CondCode { + // To be used with float branch True + FCOND_F, + FCOND_UN, + FCOND_EQ, + FCOND_UEQ, + FCOND_OLT, + FCOND_ULT, + FCOND_OLE, + FCOND_ULE, + FCOND_SF, + FCOND_NGLE, + FCOND_SEQ, + FCOND_NGL, + FCOND_LT, + FCOND_NGE, + FCOND_LE, + FCOND_NGT, + + // To be used with float branch False + // This conditions have the same mnemonic as the + // above ones, but are used with a branch False; + FCOND_T, + FCOND_OR, + FCOND_NEQ, + FCOND_OGL, + FCOND_UGE, + FCOND_OGE, + FCOND_UGT, + FCOND_OGT, + FCOND_ST, + FCOND_GLE, + FCOND_SNE, + FCOND_GL, + FCOND_NLT, + FCOND_GE, + FCOND_NLE, + FCOND_GT, + + // Only integer conditions + COND_E, + COND_GZ, + COND_GEZ, + COND_LZ, + COND_LEZ, + COND_NE, + COND_INVALID + }; + + // Turn condition code into conditional branch opcode. + unsigned GetCondBranchFromCond(CondCode CC); + + /// GetOppositeBranchCondition - Return the inverse of the specified cond, + /// e.g. turning COND_E to COND_NE. + CondCode GetOppositeBranchCondition(MBlaze::CondCode CC); + + /// MBlazeCCToString - Map each FP condition code to its string + inline static const char *MBlazeFCCToString(MBlaze::CondCode CC) + { + switch (CC) { + default: llvm_unreachable("Unknown condition code"); + case FCOND_F: + case FCOND_T: return "f"; + case FCOND_UN: + case FCOND_OR: return "un"; + case FCOND_EQ: + case FCOND_NEQ: return "eq"; + case FCOND_UEQ: + case FCOND_OGL: return "ueq"; + case FCOND_OLT: + case FCOND_UGE: return "olt"; + case FCOND_ULT: + case FCOND_OGE: return "ult"; + case FCOND_OLE: + case FCOND_UGT: return "ole"; + case FCOND_ULE: + case FCOND_OGT: return "ule"; + case FCOND_SF: + case FCOND_ST: return "sf"; + case FCOND_NGLE: + case FCOND_GLE: return "ngle"; + case FCOND_SEQ: + case FCOND_SNE: return "seq"; + case FCOND_NGL: + case FCOND_GL: return "ngl"; + case FCOND_LT: + case FCOND_NLT: return "lt"; + case FCOND_NGE: + case FCOND_GE: return "ge"; + case FCOND_LE: + case FCOND_NLE: return "nle"; + case FCOND_NGT: + case FCOND_GT: return "gt"; + } + } +} + +/// MBlazeII - This namespace holds all of the target specific flags that +/// instruction info tracks. +/// +namespace MBlazeII { + /// Target Operand Flag enum. + enum TOF { + //===------------------------------------------------------------------===// + // MBlaze Specific MachineOperand flags. + MO_NO_FLAG, + + /// MO_GOT - Represents the offset into the global offset table at which + /// the address the relocation entry symbol resides during execution. + MO_GOT, + + /// MO_GOT_CALL - Represents the offset into the global offset table at + /// which the address of a call site relocation entry symbol resides + /// during execution. This is different from the above since this flag + /// can only be present in call instructions. + MO_GOT_CALL, + + /// MO_GPREL - Represents the offset from the current gp value to be used + /// for the relocatable object file being produced. + MO_GPREL, + + /// MO_ABS_HILO - Represents the hi or low part of an absolute symbol + /// address. + MO_ABS_HILO + + }; +} + +class MBlazeInstrInfo : public TargetInstrInfoImpl { + MBlazeTargetMachine &TM; + const MBlazeRegisterInfo RI; +public: + explicit MBlazeInstrInfo(MBlazeTargetMachine &TM); + + /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As + /// such, whenever a client has an instance of instruction info, it should + /// always be able to get register info as well (through this method). + /// + virtual const MBlazeRegisterInfo &getRegisterInfo() const { return RI; } + + /// isLoadFromStackSlot - If the specified machine instruction is a direct + /// load from a stack slot, return the virtual or physical register number of + /// the destination along with the FrameIndex of the loaded stack slot. If + /// not, return 0. This predicate must return 0 if the instruction has + /// any side effects other than loading from the stack slot. + virtual unsigned isLoadFromStackSlot(const MachineInstr *MI, + int &FrameIndex) const; + + /// isStoreToStackSlot - If the specified machine instruction is a direct + /// store to a stack slot, return the virtual or physical register number of + /// the source reg along with the FrameIndex of the loaded stack slot. If + /// not, return 0. This predicate must return 0 if the instruction has + /// any side effects other than storing to the stack slot. + virtual unsigned isStoreToStackSlot(const MachineInstr *MI, + int &FrameIndex) const; + + /// Branch Analysis + virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, + MachineBasicBlock *FBB, + const SmallVectorImpl<MachineOperand> &Cond, + DebugLoc DL) const; + virtual void copyPhysReg(MachineBasicBlock &MBB, + MachineBasicBlock::iterator I, DebugLoc DL, + unsigned DestReg, unsigned SrcReg, + bool KillSrc) const; + virtual void storeRegToStackSlot(MachineBasicBlock &MBB, + MachineBasicBlock::iterator MBBI, + unsigned SrcReg, bool isKill, int FrameIndex, + const TargetRegisterClass *RC, + const TargetRegisterInfo *TRI) const; + + virtual void loadRegFromStackSlot(MachineBasicBlock &MBB, + MachineBasicBlock::iterator MBBI, + unsigned DestReg, int FrameIndex, + const TargetRegisterClass *RC, + const TargetRegisterInfo *TRI) const; + + /// Insert nop instruction when hazard condition is found + virtual void insertNoop(MachineBasicBlock &MBB, + MachineBasicBlock::iterator MI) const; + + /// getGlobalBaseReg - Return a virtual register initialized with the + /// the global base register value. Output instructions required to + /// initialize the register in the function entry block, if necessary. + /// + unsigned getGlobalBaseReg(MachineFunction *MF) const; +}; + +} + +#endif |
