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/*
* Copyright 2020 Google, Inc.
*
* 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.
*/
#ifndef __ARCH_GENERIC_DECODER_HH__
#define __ARCH_GENERIC_DECODER_HH__
#include "base/bitfield.hh"
#include "base/intmath.hh"
#include "base/types.hh"
#include "cpu/static_inst_fwd.hh"
class InstDecoder
{
protected:
void *_moreBytesPtr;
size_t _moreBytesSize;
Addr _pcMask;
public:
template <typename MoreBytesType>
InstDecoder(MoreBytesType *mb_buf) :
_moreBytesPtr(mb_buf), _moreBytesSize(sizeof(MoreBytesType)),
_pcMask(~mask(floorLog2(_moreBytesSize)))
{}
virtual StaticInstPtr fetchRomMicroop(
MicroPC micropc, StaticInstPtr curMacroop);
void *moreBytesPtr() const { return _moreBytesPtr; }
size_t moreBytesSize() const { return _moreBytesSize; }
Addr pcMask() const { return _pcMask; }
};
#endif // __ARCH_DECODER_GENERIC_HH__