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//===- PPCInstrInfo.h - PowerPC Instruction Information ---------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the PowerPC implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef POWERPC32_INSTRUCTIONINFO_H
#define POWERPC32_INSTRUCTIONINFO_H
#include "PPC.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "PPCRegisterInfo.h"
namespace llvm {
/// PPCII - This namespace holds all of the PowerPC target-specific
/// per-instruction flags. These must match the corresponding definitions in
/// PPC.td and PPCInstrFormats.td.
namespace PPCII {
enum {
// PPC970 Instruction Flags. These flags describe the characteristics of the
// PowerPC 970 (aka G5) dispatch groups and how they are formed out of
// raw machine instructions.
/// PPC970_First - This instruction starts a new dispatch group, so it will
/// always be the first one in the group.
PPC970_First = 0x1,
/// PPC970_Single - This instruction starts a new dispatch group and
/// terminates it, so it will be the sole instruction in the group.
PPC970_Single = 0x2,
/// PPC970_Cracked - This instruction is cracked into two pieces, requiring
/// two dispatch pipes to be available to issue.
PPC970_Cracked = 0x4,
/// PPC970_Mask/Shift - This is a bitmask that selects the pipeline type that
/// an instruction is issued to.
PPC970_Shift = 3,
PPC970_Mask = 0x07 << PPC970_Shift
};
enum PPC970_Unit {
/// These are the various PPC970 execution unit pipelines. Each instruction
/// is one of these.
PPC970_Pseudo = 0 << PPC970_Shift, // Pseudo instruction
PPC970_FXU = 1 << PPC970_Shift, // Fixed Point (aka Integer/ALU) Unit
PPC970_LSU = 2 << PPC970_Shift, // Load Store Unit
PPC970_FPU = 3 << PPC970_Shift, // Floating Point Unit
PPC970_CRU = 4 << PPC970_Shift, // Control Register Unit
PPC970_VALU = 5 << PPC970_Shift, // Vector ALU
PPC970_VPERM = 6 << PPC970_Shift, // Vector Permute Unit
PPC970_BRU = 7 << PPC970_Shift // Branch Unit
};
}
class PPCInstrInfo : public TargetInstrInfo {
PPCTargetMachine &TM;
const PPCRegisterInfo RI;
public:
PPCInstrInfo(PPCTargetMachine &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 MRegisterInfo &getRegisterInfo() const { return RI; }
/// getPointerRegClass - Return the register class to use to hold pointers.
/// This is used for addressing modes.
virtual const TargetRegisterClass *getPointerRegClass() const;
// Return true if the instruction is a register to register move and
// leave the source and dest operands in the passed parameters.
//
virtual bool isMoveInstr(const MachineInstr& MI,
unsigned& sourceReg,
unsigned& destReg) const;
unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
// commuteInstruction - We can commute rlwimi instructions, but only if the
// rotate amt is zero. We also have to munge the immediates a bit.
virtual MachineInstr *commuteInstruction(MachineInstr *MI) const;
virtual void insertNoop(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI) const;
static unsigned invertPPCBranchOpcode(unsigned Opcode) {
switch (Opcode) {
default: assert(0 && "Unknown PPC branch opcode!");
case PPC::BEQ: return PPC::BNE;
case PPC::BNE: return PPC::BEQ;
case PPC::BLT: return PPC::BGE;
case PPC::BGE: return PPC::BLT;
case PPC::BGT: return PPC::BLE;
case PPC::BLE: return PPC::BGT;
case PPC::BNU: return PPC::BUN;
case PPC::BUN: return PPC::BNU;
}
}
};
}
#endif
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