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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
*/
#include "arch/power/insts/branch.hh"
#include "base/loader/symtab.hh"
#include "cpu/thread_context.hh"
using namespace PowerISA;
const std::string &
PCDependentDisassembly::disassemble(Addr pc, const SymbolTable *symtab) const
{
if (!cachedDisassembly ||
pc != cachedPC || symtab != cachedSymtab)
{
if (cachedDisassembly)
delete cachedDisassembly;
cachedDisassembly =
new std::string(generateDisassembly(pc, symtab));
cachedPC = pc;
cachedSymtab = symtab;
}
return *cachedDisassembly;
}
PowerISA::PCState
BranchPCRel::branchTarget(const PowerISA::PCState &pc) const
{
return (uint32_t)(pc.pc() + disp);
}
std::string
BranchPCRel::generateDisassembly(Addr pc, const SymbolTable *symtab) const
{
std::stringstream ss;
ccprintf(ss, "%-10s ", mnemonic);
Addr target = pc + disp;
std::string str;
if (symtab && symtab->findSymbol(target, str))
ss << str;
else
ccprintf(ss, "0x%x", target);
return ss.str();
}
PowerISA::PCState
BranchNonPCRel::branchTarget(const PowerISA::PCState &pc) const
{
return targetAddr;
}
std::string
BranchNonPCRel::generateDisassembly(Addr pc, const SymbolTable *symtab) const
{
std::stringstream ss;
ccprintf(ss, "%-10s ", mnemonic);
std::string str;
if (symtab && symtab->findSymbol(targetAddr, str))
ss << str;
else
ccprintf(ss, "0x%x", targetAddr);
return ss.str();
}
PowerISA::PCState
BranchPCRelCond::branchTarget(const PowerISA::PCState &pc) const
{
return (uint32_t)(pc.pc() + disp);
}
std::string
BranchPCRelCond::generateDisassembly(Addr pc, const SymbolTable *symtab) const
{
std::stringstream ss;
ccprintf(ss, "%-10s ", mnemonic);
ss << bo << ", " << bi << ", ";
Addr target = pc + disp;
std::string str;
if (symtab && symtab->findSymbol(target, str))
ss << str;
else
ccprintf(ss, "0x%x", target);
return ss.str();
}
PowerISA::PCState
BranchNonPCRelCond::branchTarget(const PowerISA::PCState &pc) const
{
return targetAddr;
}
std::string
BranchNonPCRelCond::generateDisassembly(Addr pc,
const SymbolTable *symtab) const
{
std::stringstream ss;
ccprintf(ss, "%-10s ", mnemonic);
ss << bo << ", " << bi << ", ";
std::string str;
if (symtab && symtab->findSymbol(targetAddr, str))
ss << str;
else
ccprintf(ss, "0x%x", targetAddr);
return ss.str();
}
PowerISA::PCState
BranchRegCond::branchTarget(ThreadContext *tc) const
{
uint32_t regVal = tc->readIntReg(_srcRegIdx[_numSrcRegs - 1]);
return regVal & 0xfffffffc;
}
std::string
BranchRegCond::generateDisassembly(Addr pc,
const SymbolTable *symtab) const
{
std::stringstream ss;
ccprintf(ss, "%-10s ", mnemonic);
ss << bo << ", " << bi << ", ";
return ss.str();
}
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