79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
/*
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* Copyright (c) 2014-2015 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* For use for simulation and test purposes only
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Author: Anthony Gutierrez, Sooraj Puthoor
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*/
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#ifndef __FETCH_STAGE_HH__
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#define __FETCH_STAGE_HH__
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#include <string>
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#include <vector>
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#include "gpu-compute/fetch_unit.hh"
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// Instruction fetch stage.
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// All dispatched wavefronts for all SIMDS are analyzed for the
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// need to fetch instructions. From the fetch eligible waves,
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// one wave is selected from each SIMD and fetch is initiated
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// for the selected waves.
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class ComputeUnit;
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class Wavefront;
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class FetchStage
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{
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public:
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FetchStage(const ComputeUnitParams* params);
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~FetchStage();
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void init(ComputeUnit *cu);
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void exec();
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void processFetchReturn(PacketPtr pkt);
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void fetch(PacketPtr pkt, Wavefront *wave);
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// Stats related variables and methods
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std::string name() { return _name; }
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void regStats();
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Stats::Distribution instFetchInstReturned;
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private:
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uint32_t numSIMDs;
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ComputeUnit *computeUnit;
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// List of fetch units. A fetch unit is
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// instantiated per SIMD
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std::vector<FetchUnit> fetchUnit;
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std::string _name;
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};
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#endif // __FETCH_STAGE_HH__
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