139 lines
4.1 KiB
C++
139 lines
4.1 KiB
C++
/*
|
|
* 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_MULT_DIV_UNIT_HH__
|
|
#define __CPU_INORDER_MULT_DIV_UNIT_HH__
|
|
|
|
#include <vector>
|
|
#include <list>
|
|
#include <string>
|
|
|
|
#include "cpu/func_unit.hh"
|
|
#include "cpu/op_class.hh"
|
|
#include "cpu/inorder/first_stage.hh"
|
|
#include "cpu/inorder/resource.hh"
|
|
#include "cpu/inorder/inorder_dyn_inst.hh"
|
|
|
|
class MDUEvent;
|
|
|
|
class MultDivUnit : public Resource {
|
|
public:
|
|
typedef ThePipeline::DynInstPtr DynInstPtr;
|
|
|
|
enum Command {
|
|
StartMultDiv,
|
|
EndMultDiv,
|
|
MultDiv
|
|
};
|
|
|
|
public:
|
|
MultDivUnit(std::string res_name, int res_id, int res_width,
|
|
int res_latency, InOrderCPU *_cpu, ThePipeline::Params *params);
|
|
virtual ~MultDivUnit() {}
|
|
|
|
public:
|
|
/** Override default Resource getSlot(). Will only getSlot if
|
|
* valid mult/div sequence is being maintained
|
|
*/
|
|
virtual int getSlot(DynInstPtr inst);
|
|
|
|
virtual int findSlot(DynInstPtr inst);
|
|
|
|
virtual void freeSlot(int slot_idx);
|
|
|
|
virtual void init();
|
|
|
|
/** Get Operand Size For A Division Operation */
|
|
int getDivOpSize(DynInstPtr inst);
|
|
|
|
/** Override default Resource execute */
|
|
virtual void execute(int slot_num);
|
|
|
|
void exeMulDiv(int slot_num);
|
|
|
|
/** Register extra resource stats */
|
|
virtual void regStats();
|
|
|
|
protected:
|
|
/** Latency & Repeat Rate for Multiply Insts */
|
|
unsigned multRepeatRate;
|
|
unsigned multLatency;
|
|
|
|
/** Latency & Repeat Rate for 8-bit Divide Insts */
|
|
unsigned div8RepeatRate;
|
|
unsigned div8Latency;
|
|
|
|
/** Latency & Repeat Rate for 16-bit Divide Insts */
|
|
unsigned div16RepeatRate;
|
|
unsigned div16Latency;
|
|
|
|
/** Latency & Repeat Rate for 24-bit Divide Insts */
|
|
unsigned div24RepeatRate;
|
|
unsigned div24Latency;
|
|
|
|
/** Latency & Repeat Rate for 32-bit Divide Insts */
|
|
unsigned div32RepeatRate;
|
|
unsigned div32Latency;
|
|
|
|
/** Last cycle that MDU was used */
|
|
Tick lastMDUCycle;
|
|
|
|
/** Last type of instruction MDU started processing */
|
|
OpClass lastOpType;
|
|
|
|
/** Last Division Operand of instruction MDU was processing */
|
|
uint32_t lastDivSize;
|
|
|
|
/** Last instruction name the MDU used */
|
|
std::string lastInstName;
|
|
|
|
/** Number of Instruction Requests the Resource Processes */
|
|
Stats::Scalar multInstReqsProcessed;
|
|
|
|
/** Number of Instruction Requests the Resource Processes */
|
|
Stats::Scalar divInstReqsProcessed;
|
|
|
|
MDUEvent *mduEvent;
|
|
};
|
|
|
|
class MDUEvent : public ResourceEvent
|
|
{
|
|
public:
|
|
MDUEvent();
|
|
virtual ~MDUEvent() { }
|
|
|
|
|
|
virtual void process();
|
|
};
|
|
|
|
|
|
#endif //__CPU_INORDER_MULT_DIV_UNIT_HH__
|