175 lines
6.1 KiB
C++
175 lines
6.1 KiB
C++
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/*
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* Copyright (c) 2003-2005 The Regents of The University of Michigan
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* All rights reserved.
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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
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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* Ali Saidi
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*/
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#include "arch/sparc/floatregfile.hh"
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#include "base/trace.hh"
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#include "sim/byteswap.hh"
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#include "sim/serialize.hh"
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using namespace SparcISA;
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using namespace std;
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class Checkpoint;
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string SparcISA::getFloatRegName(RegIndex index)
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{
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static std::string floatRegName[NumFloatRegs] =
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{"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
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"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
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"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
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"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
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"f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
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"f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
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"f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
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"f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63"};
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return floatRegName[index];
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}
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void FloatRegFile::clear()
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{
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bzero(regSpace, sizeof(regSpace));
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}
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FloatReg FloatRegFile::readReg(int floatReg, int width)
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{
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//In each of these cases, we have to copy the value into a temporary
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//variable. This is because we may otherwise try to access an
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//unaligned portion of memory.
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switch(width)
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{
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case SingleWidth:
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float32_t result32;
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memcpy(&result32, regSpace + 4 * floatReg, sizeof(result32));
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return htog(result32);
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case DoubleWidth:
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float64_t result64;
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memcpy(&result64, regSpace + 4 * floatReg, sizeof(result64));
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return htog(result64);
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case QuadWidth:
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float128_t result128;
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memcpy(&result128, regSpace + 4 * floatReg, sizeof(result128));
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return htog(result128);
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default:
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panic("Attempted to read a %d bit floating point register!", width);
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}
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}
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FloatRegBits FloatRegFile::readRegBits(int floatReg, int width)
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{
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//In each of these cases, we have to copy the value into a temporary
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//variable. This is because we may otherwise try to access an
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//unaligned portion of memory.
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switch(width)
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{
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case SingleWidth:
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uint32_t result32;
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memcpy(&result32, regSpace + 4 * floatReg, sizeof(result32));
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return htog(result32);
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case DoubleWidth:
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uint64_t result64;
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memcpy(&result64, regSpace + 4 * floatReg, sizeof(result64));
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return htog(result64);
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case QuadWidth:
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uint64_t result128;
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memcpy(&result128, regSpace + 4 * floatReg, sizeof(result128));
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return htog(result128);
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default:
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panic("Attempted to read a %d bit floating point register!", width);
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}
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}
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Fault FloatRegFile::setReg(int floatReg, const FloatReg &val, int width)
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{
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//In each of these cases, we have to copy the value into a temporary
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//variable. This is because we may otherwise try to access an
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//unaligned portion of memory.
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uint32_t result32;
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uint64_t result64;
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DPRINTF(Sparc, "Setting floating point register %d\n", floatReg);
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switch(width)
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{
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case SingleWidth:
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result32 = gtoh((uint32_t)val);
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memcpy(regSpace + 4 * floatReg, &result32, sizeof(result32));
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break;
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case DoubleWidth:
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result64 = gtoh((uint64_t)val);
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memcpy(regSpace + 4 * floatReg, &result64, sizeof(result64));
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break;
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case QuadWidth:
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panic("Quad width FP not implemented.");
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break;
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default:
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panic("Attempted to read a %d bit floating point register!", width);
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}
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return NoFault;
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}
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Fault FloatRegFile::setRegBits(int floatReg, const FloatRegBits &val, int width)
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{
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//In each of these cases, we have to copy the value into a temporary
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//variable. This is because we may otherwise try to access an
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//unaligned portion of memory.
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uint32_t result32;
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uint64_t result64;
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switch(width)
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{
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case SingleWidth:
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result32 = gtoh((uint32_t)val);
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memcpy(regSpace + 4 * floatReg, &result32, sizeof(result32));
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break;
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case DoubleWidth:
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result64 = gtoh((uint64_t)val);
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memcpy(regSpace + 4 * floatReg, &result64, sizeof(result64));
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break;
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case QuadWidth:
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panic("Quad width FP not implemented.");
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break;
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default:
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panic("Attempted to read a %d bit floating point register!", width);
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}
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return NoFault;
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}
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void FloatRegFile::serialize(std::ostream &os)
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{
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SERIALIZE_ARRAY((unsigned char *)regSpace,
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SingleWidth / 8 * NumFloatRegs);
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}
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void FloatRegFile::unserialize(Checkpoint *cp, const std::string §ion)
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{
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UNSERIALIZE_ARRAY((unsigned char *)regSpace,
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SingleWidth / 8 * NumFloatRegs);
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}
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