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/*
* Copyright (c) 2009 The University of Edinburgh
* 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: Timothy M. Jones
*/
#ifndef __ARCH_POWER_INSTS_INTEGER_HH__
#define __ARCH_POWER_INSTS_INTEGER_HH__
#include "arch/power/insts/static_inst.hh"
#include "base/cprintf.hh"
#include "base/bitfield.hh"
namespace PowerISA
{
/**
* We provide a base class for integer operations and then inherit for
* several other classes. These specialise for instructions using immediate
* values and also rotate instructions. We also need to have versions that
* consider the Rc and OE bits.
*/
/**
* Base class for integer operations.
*/
class IntOp : public PowerStaticInst
{
protected:
bool rcSet;
bool oeSet;
// Needed for srawi only
uint32_t sh;
/// Constructor
IntOp(const char *mnem, MachInst _machInst, OpClass __opClass)
: PowerStaticInst(mnem, _machInst, __opClass),
rcSet(false), oeSet(false)
{
}
/* Compute the CR (condition register) field using signed comparison */
inline uint32_t
makeCRField(int32_t a, int32_t b, uint32_t xerSO) const
{
uint32_t c = xerSO;
/* We've pre-shifted the immediate values here */
if (a < b) { c += 0x8; }
else if (a > b) { c += 0x4; }
else { c += 0x2; }
return c;
}
/* Compute the CR (condition register) field using unsigned comparison */
inline uint32_t
makeCRField(uint32_t a, uint32_t b, uint32_t xerSO) const
{
uint32_t c = xerSO;
/* We've pre-shifted the immediate values here */
if (a < b) { c += 0x8; }
else if (a > b) { c += 0x4; }
else { c += 0x2; }
return c;
}
std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
};
/**
* Class for integer immediate (signed and unsigned) operations.
*/
class IntImmOp : public IntOp
{
protected:
int32_t imm;
uint32_t uimm;
/// Constructor
IntImmOp(const char *mnem, MachInst _machInst, OpClass __opClass)
: IntOp(mnem, _machInst, __opClass),
imm(sext<16>(machInst.si)),
uimm(machInst.si)
{
}
std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
};
/**
* Class for integer operations with a shift.
*/
class IntShiftOp : public IntOp
{
protected:
uint32_t sh;
/// Constructor
IntShiftOp(const char *mnem, MachInst _machInst, OpClass __opClass)
: IntOp(mnem, _machInst, __opClass),
sh(machInst.sh)
{
}
std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
};
/**
* Class for integer rotate operations.
*/
class IntRotateOp : public IntShiftOp
{
protected:
uint32_t mb;
uint32_t me;
uint32_t fullMask;
/// Constructor
IntRotateOp(const char *mnem, MachInst _machInst, OpClass __opClass)
: IntShiftOp(mnem, _machInst, __opClass),
mb(machInst.mb),
me(machInst.me)
{
if (me >= mb) {
fullMask = mask(31 - mb, 31 - me);
} else {
fullMask = ~mask(31 - (me + 1), 31 - (mb - 1));
}
}
uint32_t
rotateValue(uint32_t rs, uint32_t shift) const
{
uint32_t n = shift & 31;
return (rs << n) | (rs >> (32 - n));
}
std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
};
} // PowerISA namespace
#endif //__ARCH_POWER_INSTS_INTEGER_HH__
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