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/*
* Copyright (c) 2003-2005 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: Gabe Black
* Ali Saidi
*/
#include "arch/sparc/intregfile.hh"
#include "base/trace.hh"
#include "base/misc.hh"
#include "sim/serialize.hh"
#include <string.h>
using namespace SparcISA;
using namespace std;
class Checkpoint;
string SparcISA::getIntRegName(RegIndex index)
{
static std::string intRegName[NumIntArchRegs] =
{"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
"o0", "o1", "o2", "o3", "o4", "o5", "o6", "o7",
"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
"i0", "i1", "i2", "i3", "i4", "i5", "i6", "i7"};
return intRegName[index];
}
int IntRegFile::flattenIndex(int reg)
{
int flatIndex = offset[reg >> FrameOffsetBits]
| (reg & FrameOffsetMask);
DPRINTF(Sparc, "Flattened index %d into %d.\n", reg, flatIndex);
return flatIndex;
}
void IntRegFile::clear()
{
int x;
for (x = 0; x < MaxGL; x++)
memset(regGlobals[x], 0, sizeof(IntReg) * RegsPerFrame);
for(int x = 0; x < 2 * NWindows; x++)
memset(regSegments[x], 0, sizeof(IntReg) * RegsPerFrame);
}
IntRegFile::IntRegFile()
{
offset[Globals] = 0;
regView[Globals] = regGlobals[0];
setCWP(0);
clear();
}
IntReg IntRegFile::readReg(int intReg)
{
IntReg val;
if(intReg < NumIntArchRegs)
val = regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask];
else if((intReg -= NumIntArchRegs) < NumMicroIntRegs)
val = microRegs[intReg];
else
panic("Tried to read non-existant integer register %d, %d\n",
NumIntArchRegs + NumMicroIntRegs + intReg, intReg);
DPRINTF(Sparc, "Read register %d = 0x%x\n", intReg, val);
return val;
}
void IntRegFile::setReg(int intReg, const IntReg &val)
{
if(intReg)
{
DPRINTF(Sparc, "Wrote register %d = 0x%x\n", intReg, val);
if(intReg < NumIntArchRegs)
regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask] = val;
else if((intReg -= NumIntArchRegs) < NumMicroIntRegs)
microRegs[intReg] = val;
else
panic("Tried to set non-existant integer register\n");
}
}
//This doesn't effect the actual CWP register.
//It's purpose is to adjust the view of the register file
//to what it would be if CWP = cwp.
void IntRegFile::setCWP(int cwp)
{
int index = ((NWindows - cwp) % NWindows) * 2;
if (index < 0)
panic("Index less than 0. cwp=%d nwin=%d\n", cwp, NWindows);
offset[Outputs] = FrameOffset + (index * RegsPerFrame);
offset[Locals] = FrameOffset + ((index+1) * RegsPerFrame);
offset[Inputs] = FrameOffset +
(((index+2) % (NWindows * 2)) * RegsPerFrame);
regView[Outputs] = regSegments[index];
regView[Locals] = regSegments[index+1];
regView[Inputs] = regSegments[(index+2) % (NWindows * 2)];
DPRINTF(Sparc, "Changed the CWP value to %d\n", cwp);
}
void IntRegFile::setGlobals(int gl)
{
DPRINTF(Sparc, "Now using %d globals\n", gl);
regView[Globals] = regGlobals[gl];
offset[Globals] = RegGlobalOffset + gl * RegsPerFrame;
if (regView[Globals] == regView[Inputs] ||
regView[Globals] == regView[Locals] ||
regView[Globals] == regView[Outputs] )
panic("Two register arrays set to the same thing!\n");
}
void IntRegFile::serialize(std::ostream &os)
{
unsigned int x;
for(x = 0; x < MaxGL; x++)
SERIALIZE_ARRAY(regGlobals[x], RegsPerFrame);
for(x = 0; x < 2 * NWindows; x++)
SERIALIZE_ARRAY(regSegments[x], RegsPerFrame);
SERIALIZE_ARRAY(microRegs, NumMicroIntRegs);
}
void IntRegFile::unserialize(Checkpoint *cp, const std::string §ion)
{
unsigned int x;
for(x = 0; x < MaxGL; x++)
UNSERIALIZE_ARRAY(regGlobals[x], RegsPerFrame);
for(unsigned int x = 0; x < 2 * NWindows; x++)
UNSERIALIZE_ARRAY(regSegments[x], RegsPerFrame);
UNSERIALIZE_ARRAY(microRegs, NumMicroIntRegs);
}
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