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/*
* Copyright (c) 2013 ARM Limited
* Copyright (c) 2014-2015 Sven Karlsson
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2016-2017 The University of Virginia
* 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: Andreas Hansson
* Sven Karlsson
* Alec Roelke
*/
#ifndef __ARCH_RISCV_UTILITY_HH__
#define __ARCH_RISCV_UTILITY_HH__
#include <cmath>
#include <cstdint>
#include <sstream>
#include <string>
#include "arch/riscv/registers.hh"
#include "base/types.hh"
#include "cpu/reg_class.hh"
#include "cpu/static_inst.hh"
#include "cpu/thread_context.hh"
namespace RiscvISA
{
template<typename T> inline bool
isquietnan(T val)
{
return false;
}
template<> inline bool
isquietnan<float>(float val)
{
return std::isnan(val)
&& (reinterpret_cast<uint32_t&>(val)&0x00400000);
}
template<> inline bool
isquietnan<double>(double val)
{
return std::isnan(val)
&& (reinterpret_cast<uint64_t&>(val)&0x0008000000000000ULL);
}
template<typename T> inline bool
issignalingnan(T val)
{
return false;
}
template<> inline bool
issignalingnan<float>(float val)
{
return std::isnan(val)
&& (reinterpret_cast<uint32_t&>(val)&0x00200000);
}
template<> inline bool
issignalingnan<double>(double val)
{
return std::isnan(val)
&& (reinterpret_cast<uint64_t&>(val)&0x0004000000000000ULL);
}
inline PCState
buildRetPC(const PCState &curPC, const PCState &callPC)
{
PCState retPC = callPC;
retPC.advance();
retPC.pc(curPC.npc());
return retPC;
}
inline uint64_t
getArgument(ThreadContext *tc, int &number, uint16_t size, bool fp)
{
return 0;
}
inline void startupCPU(ThreadContext *tc, int cpuId)
{
}
inline void
copyRegs(ThreadContext *src, ThreadContext *dest)
{
// First loop through the integer registers.
for (int i = 0; i < NumIntRegs; ++i)
dest->setIntReg(i, src->readIntReg(i));
// Lastly copy PC/NPC
dest->pcState(src->pcState());
}
inline std::string
registerName(RegId reg)
{
if (reg.isIntReg()) {
if (reg.index() >= NumIntArchRegs) {
/*
* This should only happen if a instruction is being speculatively
* executed along a not-taken branch, and if that instruction's
* width was incorrectly predecoded (i.e., it was predecoded as a
* full instruction rather than a compressed one or vice versa).
* It also should only happen if a debug flag is on that prints
* disassembly information, so rather than panic the incorrect
* value is printed for debugging help.
*/
std::stringstream str;
str << "?? (x" << reg.index() << ')';
return str.str();
}
return IntRegNames[reg.index()];
} else {
if (reg.index() >= NumFloatRegs) {
std::stringstream str;
str << "?? (f" << reg.index() << ')';
return str.str();
}
return FloatRegNames[reg.index()];
}
}
inline void
skipFunction(ThreadContext *tc)
{
panic("Not Implemented for Riscv");
}
inline void
advancePC(PCState &pc, const StaticInstPtr &inst)
{
inst->advancePC(pc);
}
static inline bool
inUserMode(ThreadContext *tc)
{
return true;
}
inline uint64_t
getExecutingAsid(ThreadContext *tc)
{
return 0;
}
inline void
initCPU(ThreadContext *, int cpuId)
{
panic("initCPU not implemented for Riscv.\n");
}
} // namespace RiscvISA
#endif // __ARCH_RISCV_UTILITY_HH__
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