| /* |
| * 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_USE_DEF_UNIT_HH__ |
| #define __CPU_INORDER_USE_DEF_UNIT_HH__ |
| |
| #include <list> |
| #include <string> |
| #include <vector> |
| |
| #include "cpu/inorder/first_stage.hh" |
| #include "cpu/inorder/inorder_dyn_inst.hh" |
| #include "cpu/inorder/pipeline_traits.hh" |
| #include "cpu/inorder/reg_dep_map.hh" |
| #include "cpu/inorder/resource.hh" |
| #include "cpu/func_unit.hh" |
| |
| class UseDefUnit : public Resource { |
| public: |
| typedef ThePipeline::DynInstPtr DynInstPtr; |
| typedef TheISA::RegIndex RegIndex; |
| |
| enum Command { |
| ReadSrcReg, |
| WriteDestReg, |
| MarkDestRegs |
| }; |
| |
| public: |
| UseDefUnit(std::string res_name, int res_id, int res_width, |
| Cycles res_latency, InOrderCPU *_cpu, |
| ThePipeline::Params *params); |
| |
| void init(); |
| |
| ResourceRequest* getRequest(DynInstPtr _inst, int stage_num, |
| int res_idx, int slot_num, |
| unsigned cmd); |
| |
| ResReqPtr findRequest(DynInstPtr inst); |
| |
| void execute(int slot_num); |
| |
| void updateAfterContextSwitch(DynInstPtr inst, ThreadID tid); |
| |
| void regStats(); |
| |
| protected: |
| RegDepMap *regDepMap[ThePipeline::MaxThreads]; |
| |
| bool *nonSpecInstActive[ThePipeline::MaxThreads]; |
| InstSeqNum *nonSpecSeqNum[ThePipeline::MaxThreads]; |
| |
| bool serializeOnNextInst[ThePipeline::MaxThreads]; |
| InstSeqNum serializeAfterSeqNum[ThePipeline::MaxThreads]; |
| |
| Stats::Average uniqueRegsPerSwitch; |
| std::map<RegIndex, bool> uniqueIntRegMap; |
| std::map<RegIndex, bool> uniqueFloatRegMap; |
| std::map<RegIndex, bool> uniqueMiscRegMap; |
| |
| public: |
| class UseDefRequest : public ResourceRequest { |
| public: |
| typedef ThePipeline::DynInstPtr DynInstPtr; |
| |
| public: |
| UseDefRequest(UseDefUnit *res) |
| : ResourceRequest(res) |
| { } |
| |
| int useDefIdx; |
| |
| void setRequest(DynInstPtr _inst, int stage_num, int res_idx, |
| int slot_num, unsigned _cmd, int idx) |
| { |
| useDefIdx = idx; |
| |
| ResourceRequest::setRequest(_inst, stage_num, res_idx, slot_num, |
| _cmd); |
| } |
| }; |
| |
| protected: |
| /** Int. Register File Reads */ |
| Stats::Scalar intRegFileReads; |
| |
| /** Int. Register File Writes */ |
| Stats::Scalar intRegFileWrites; |
| |
| /** Int. Register File Total Accesses (Read+Write) */ |
| Stats::Formula intRegFileAccs; |
| |
| /** Float Register File Reads */ |
| Stats::Scalar floatRegFileReads; |
| |
| /** Float Register File Writes */ |
| Stats::Scalar floatRegFileWrites; |
| |
| /** Float Register File Total Accesses (Read+Write) */ |
| Stats::Formula floatRegFileAccs; |
| |
| /** Source Register Forwarding */ |
| Stats::Scalar regForwards; |
| }; |
| |
| #endif //__CPU_INORDER_USE_DEF_UNIT_HH__ |