152 lines
4.3 KiB
C++
152 lines
4.3 KiB
C++
/*
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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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* Korey Sewell
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*/
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#include "arch/mips/regfile/float_regfile.hh"
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#include "sim/serialize.hh"
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using namespace MipsISA;
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using namespace std;
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void
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FloatRegFile::clear()
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{
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bzero(®s, sizeof(regs));
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}
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double
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FloatRegFile::readReg(int floatReg, int width, ThreadID tid)
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{
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switch(width)
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{
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case SingleWidth:
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{
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void *float_ptr = ®s[floatReg];
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return *(float *) float_ptr;
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}
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case DoubleWidth:
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{
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uint64_t double_val = (FloatReg64)regs[floatReg + 1] << 32 | regs[floatReg];
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void *double_ptr = &double_val;
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return *(double *) double_ptr;
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}
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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
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FloatRegFile::readRegBits(int floatReg, int width, ThreadID tid)
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{
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if (floatReg < NumFloatArchRegs - 1) {
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switch(width)
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{
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case SingleWidth:
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return regs[floatReg];
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case DoubleWidth:
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return (FloatReg64)regs[floatReg + 1] << 32 | regs[floatReg];
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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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} else {
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if (width > SingleWidth)
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assert("Control Regs are only 32 bits wide");
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return regs[floatReg];
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}
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}
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Fault
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FloatRegFile::setReg(int floatReg, const FloatRegVal &val, int width,
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ThreadID tid)
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{
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switch(width)
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{
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case SingleWidth:
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{
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float temp = val;
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void *float_ptr = &temp;
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regs[floatReg] = *(FloatReg32 *) float_ptr;
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break;
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}
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case DoubleWidth:
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{
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const void *double_ptr = &val;
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FloatReg64 temp_double = *(FloatReg64 *) double_ptr;
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regs[floatReg + 1] = bits(temp_double, 63, 32);
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regs[floatReg] = bits(temp_double, 31, 0);
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break;
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}
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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
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FloatRegFile::setRegBits(int floatReg, const FloatRegBits &val, int width,
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ThreadID tid)
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{
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switch(width)
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{
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case SingleWidth:
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regs[floatReg] = val;
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break;
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case DoubleWidth:
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regs[floatReg + 1] = bits(val, 63, 32);
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regs[floatReg] = bits(val, 31, 0);
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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
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FloatRegFile::serialize(std::ostream &os)
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{
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SERIALIZE_ARRAY(regs, NumFloatRegs);
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}
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void
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FloatRegFile::unserialize(Checkpoint *cp, const std::string §ion)
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{
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UNSERIALIZE_ARRAY(regs, NumFloatRegs);
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}
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