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/*
* Copyright (c) 2006-2007 The Regents of The University of Michigan
* 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: Gabe Black
* Steve Reinhardt
*/
#ifndef __ARCH_SPARC_INSTS_BRANCH_HH__
#define __ARCH_SPARC_INSTS_BRANCH_HH__
#include "arch/sparc/insts/static_inst.hh"
////////////////////////////////////////////////////////////////////
//
// Branch instructions
//
namespace SparcISA
{
/**
* Base class for branch operations.
*/
class Branch : public SparcStaticInst
{
protected:
using SparcStaticInst::SparcStaticInst;
std::string generateDisassembly(
Addr pc, const SymbolTable *symtab) const override;
};
/**
* Base class for branch operations with an immediate displacement.
*/
class BranchDisp : public Branch
{
protected:
BranchDisp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
int32_t _disp) :
Branch(mnem, _machInst, __opClass), disp(_disp)
{}
std::string generateDisassembly(
Addr pc, const SymbolTable *symtab) const override;
int32_t disp;
};
/**
* Base class for branches with n bit displacements.
*/
template<int bits>
class BranchNBits : public BranchDisp
{
protected:
// Constructor
BranchNBits(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
BranchDisp(mnem, _machInst, __opClass,
sext<bits + 2>((_machInst & mask(bits)) << 2))
{}
};
/**
* Base class for 16bit split displacements.
*/
class BranchSplit : public BranchDisp
{
protected:
// Constructor
BranchSplit(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
BranchDisp(mnem, _machInst, __opClass,
sext<18>((bits(_machInst, 21, 20) << 16) |
(bits(_machInst, 13, 0) << 2)))
{}
};
/**
* Base class for branches that use an immediate and a register to
* compute their displacements.
*/
class BranchImm13 : public Branch
{
protected:
// Constructor
BranchImm13(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
Branch(mnem, _machInst, __opClass),
imm(sext<13>(bits(_machInst, 12, 0)))
{}
std::string generateDisassembly(
Addr pc, const SymbolTable *symtab) const override;
int32_t imm;
};
}
#endif // __ARCH_SPARC_INSTS_BRANCH_HH__
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