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/*
* Copyright (c) 2002-2006 The Regents of The University of Michigan
* 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: Steve Raasch
*/
#include "cpu/func_unit.hh"
#include <sstream>
#include "base/logging.hh"
using namespace std;
////////////////////////////////////////////////////////////////////////////
//
// The funciton unit
//
FuncUnit::FuncUnit()
{
opLatencies.fill(0);
pipelined.fill(false);
capabilityList.reset();
}
// Copy constructor
FuncUnit::FuncUnit(const FuncUnit &fu)
{
for (int i = 0; i < Num_OpClasses; ++i) {
opLatencies[i] = fu.opLatencies[i];
pipelined[i] = fu.pipelined[i];
}
capabilityList = fu.capabilityList;
}
void
FuncUnit::addCapability(OpClass cap, unsigned oplat, bool pipeline)
{
if (oplat == 0)
panic("FuncUnit: you don't really want a zero-cycle latency do you?");
capabilityList.set(cap);
opLatencies[cap] = oplat;
pipelined[cap] = pipeline;
}
bool
FuncUnit::provides(OpClass capability)
{
return capabilityList[capability];
}
bitset<Num_OpClasses>
FuncUnit::capabilities()
{
return capabilityList;
}
unsigned &
FuncUnit::opLatency(OpClass cap)
{
return opLatencies[cap];
}
bool
FuncUnit::isPipelined(OpClass capability)
{
return pipelined[capability];
}
////////////////////////////////////////////////////////////////////////////
//
// The SimObjects we use to get the FU information into the simulator
//
////////////////////////////////////////////////////////////////////////////
//
// We use 2 objects to specify this data in the INI file:
// (1) OpDesc - Describes the operation class & latencies
// (multiple OpDesc objects can refer to the same
// operation classes)
// (2) FUDesc - Describes the operations available in the unit &
// the number of these units
//
//
//
// The operation-class description object
//
OpDesc *
OpDescParams::create()
{
return new OpDesc(this);
}
//
// The FuDesc object
//
FUDesc *
FUDescParams::create()
{
return new FUDesc(this);
}
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