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/*
* Copyright (c) 2006 The Regents of The University of Michigan
* Copyright (c) 2007 MIPS Technologies, Inc.
* 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: Korey Sewell
*/
#ifndef __ARCH_MIPS_REGFILE_FLOAT_REGFILE_HH__
#define __ARCH_MIPS_REGFILE_FLOAT_REGFILE_HH__
#include "arch/mips/types.hh"
#include "arch/mips/isa_traits.hh"
#include "base/misc.hh"
#include "base/bitfield.hh"
#include "sim/faults.hh"
#include <string>
class Checkpoint;
namespace MipsISA
{
const uint32_t MIPS32_QNAN = 0x7fbfffff;
const uint64_t MIPS64_QNAN = ULL(0x7fbfffffffffffff);
enum FPControlRegNums {
FIR = NumFloatArchRegs,
FCCR,
FEXR,
FENR,
FCSR
};
enum FCSRBits {
Inexact = 1,
Underflow,
Overflow,
DivideByZero,
Invalid,
Unimplemented
};
enum FCSRFields {
Flag_Field = 1,
Enable_Field = 6,
Cause_Field = 11
};
const int SingleWidth = 32;
const int SingleBytes = SingleWidth / 4;
const int DoubleWidth = 64;
const int DoubleBytes = DoubleWidth / 4;
const int QuadWidth = 128;
const int QuadBytes = QuadWidth / 4;
class FloatRegFile
{
protected:
FloatReg32 regs[NumFloatRegs];
public:
static const int regWidth = SingleWidth;
void clear();
double readReg(int floatReg, int width, unsigned tid = 0);
FloatRegBits readRegBits(int floatReg, int width, unsigned tid = 0);
Fault setReg(int floatReg, const FloatRegVal &val, int width, unsigned tid = 0);
Fault setRegBits(int floatReg, const FloatRegBits &val, int width, unsigned tid = 0);
void serialize(std::ostream &os);
void unserialize(Checkpoint *cp, const std::string §ion);
};
} // namespace MipsISA
#endif
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