PPCInstrInfo.h revision e44b2d16ee088c44ebbe6f21a2af8b5321b68e48
1//===- PPCInstrInfo.h - PowerPC32 Instruction Information -------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file was developed by the LLVM research group and is distributed under 6// the University of Illinois Open Source License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file contains the PowerPC implementation of the TargetInstrInfo class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef POWERPC32_INSTRUCTIONINFO_H 15#define POWERPC32_INSTRUCTIONINFO_H 16 17#include "PPC.h" 18#include "llvm/Target/TargetInstrInfo.h" 19#include "PPCRegisterInfo.h" 20 21namespace llvm { 22 23class PPCInstrInfo : public TargetInstrInfo { 24 const PPCRegisterInfo RI; 25public: 26 PPCInstrInfo(); 27 28 /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As 29 /// such, whenever a client has an instance of instruction info, it should 30 /// always be able to get register info as well (through this method). 31 /// 32 virtual const MRegisterInfo &getRegisterInfo() const { return RI; } 33 34 // 35 // Return true if the instruction is a register to register move and 36 // leave the source and dest operands in the passed parameters. 37 // 38 virtual bool isMoveInstr(const MachineInstr& MI, 39 unsigned& sourceReg, 40 unsigned& destReg) const; 41 42 // commuteInstruction - We can commute rlwimi instructions, but only if the 43 // rotate amt is zero. We also have to munge the immediates a bit. 44 virtual MachineInstr *commuteInstruction(MachineInstr *MI) const; 45 46 static unsigned invertPPCBranchOpcode(unsigned Opcode) { 47 switch (Opcode) { 48 default: assert(0 && "Unknown PPC branch opcode!"); 49 case PPC::BEQ: return PPC::BNE; 50 case PPC::BNE: return PPC::BEQ; 51 case PPC::BLT: return PPC::BGE; 52 case PPC::BGE: return PPC::BLT; 53 case PPC::BGT: return PPC::BLE; 54 case PPC::BLE: return PPC::BGT; 55 case PPC::BNU: return PPC::BUN; 56 case PPC::BUN: return PPC::BNU; 57 } 58 } 59}; 60 61} 62 63#endif 64