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/*
* Copyright (c) 2007 MIPS Technologies, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Korey Sewell
*
*/
#ifndef CPU_INORDER_REG_DEP_MAP_HH
#define CPU_INORDER_REG_DEP_MAP_HH
#include <list>
#include <vector>
#include <string>
#include "arch/isa_traits.hh"
#include "config/the_isa.hh"
#include "cpu/inorder/pipeline_traits.hh"
class RegDepMap
{
public:
typedef ThePipeline::DynInstPtr DynInstPtr;
typedef TheISA::RegIndex RegIndex;
typedef uint8_t RegType;
RegDepMap(int size = TheISA::TotalNumRegs);
~RegDepMap();
static std::string mapNames[];
std::string name();
void setCPU(InOrderCPU *_cpu);
/** Clear the Entire Map */
void clear();
/** Insert all of a instruction's destination registers into map*/
void insert(DynInstPtr inst);
/** Remove all of a instruction's destination registers into map*/
void remove(DynInstPtr inst);
/** Remove Front instruction from a destination register */
void removeFront(uint8_t reg_type, RegIndex idx, DynInstPtr inst);
/** Is the current instruction able to read from this
* destination register?
*/
bool canRead(uint8_t reg_type, RegIndex idx, DynInstPtr inst);
/** Is the current instruction able to get a forwarded value from
* another instruction for this destination register?
*/
DynInstPtr canForward(uint8_t reg_type, unsigned reg_idx,
DynInstPtr inst, unsigned clean_idx);
/** find an instruction to forward/bypass a value from */
DynInstPtr findBypassInst(RegIndex idx);
/** Is the current instruction able to write to this
* destination register?
*/
bool canWrite(uint8_t reg_type, RegIndex idx, DynInstPtr inst);
/** Size of Dependency of Map */
int depSize(RegIndex idx);
void dump();
private:
/** Insert an instruction into a specific destination register index
* onto map. This must be called w/the unflattened registered index
*/
void insert(RegIndex idx, DynInstPtr inst);
/** Remove a specific instruction and dest. register index from map
* This must be called w/the unflattened registered index
*/
void remove(RegIndex idx, DynInstPtr inst);
typedef std::vector<std::list<DynInstPtr> > DepMap;
std::vector<DepMap> regMap;
InOrderCPU *cpu;
};
#endif
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