RandomWOW/src/VirtualMachine.cpp

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/*
Copyright (c) 2018 tevador
This file is part of RandomX.
RandomX is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
RandomX is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with RandomX. If not, see<http://www.gnu.org/licenses/>.
*/
#include "VirtualMachine.hpp"
#include "common.hpp"
#include "hashAes1Rx4.hpp"
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#include "blake2/blake2.h"
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#include <cstring>
#include <iomanip>
#include "intrinPortable.h"
std::ostream& operator<<(std::ostream& os, const RandomX::RegisterFile& rf) {
for (int i = 0; i < RandomX::RegistersCount; ++i)
os << std::hex << "r" << i << " = " << rf.r[i] << std::endl << std::dec;
for (int i = 0; i < 4; ++i)
os << std::hex << "f" << i << " = " << *(uint64_t*)&rf.f[i].hi << " (" << rf.f[i].hi << ")" << std::endl
<< " = " << *(uint64_t*)&rf.f[i].lo << " (" << rf.f[i].lo << ")" << std::endl << std::dec;
for (int i = 0; i < 4; ++i)
os << std::hex << "e" << i << " = " << *(uint64_t*)&rf.e[i].hi << " (" << rf.e[i].hi << ")" << std::endl
<< " = " << *(uint64_t*)&rf.e[i].lo << " (" << rf.e[i].lo << ")" << std::endl << std::dec;
for (int i = 0; i < 4; ++i)
os << std::hex << "a" << i << " = " << *(uint64_t*)&rf.a[i].hi << " (" << rf.a[i].hi << ")" << std::endl
<< " = " << *(uint64_t*)&rf.a[i].lo << " (" << rf.a[i].lo << ")" << std::endl << std::dec;
return os;
}
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namespace RandomX {
constexpr int mantissaSize = 52;
constexpr int exponentSize = 11;
constexpr uint64_t mantissaMask = (1ULL << mantissaSize) - 1;
constexpr uint64_t exponentMask = (1ULL << exponentSize) - 1;
constexpr int exponentBias = 1023;
static inline uint64_t getSmallPositiveFloatBits(uint64_t entropy) {
auto exponent = entropy >> 59; //0..31
auto mantissa = entropy & mantissaMask;
exponent += exponentBias;
exponent &= exponentMask;
exponent <<= mantissaSize;
return exponent | mantissa;
}
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VirtualMachine::VirtualMachine() {
mem.ds.dataset.memory = nullptr;
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}
void VirtualMachine::resetRoundingMode() {
initFpu();
}
void VirtualMachine::initialize() {
store64(&reg.a[0].lo, getSmallPositiveFloatBits(program.getEntropy(0)));
store64(&reg.a[0].hi, getSmallPositiveFloatBits(program.getEntropy(1)));
store64(&reg.a[1].lo, getSmallPositiveFloatBits(program.getEntropy(2)));
store64(&reg.a[1].hi, getSmallPositiveFloatBits(program.getEntropy(3)));
store64(&reg.a[2].lo, getSmallPositiveFloatBits(program.getEntropy(4)));
store64(&reg.a[2].hi, getSmallPositiveFloatBits(program.getEntropy(5)));
store64(&reg.a[3].lo, getSmallPositiveFloatBits(program.getEntropy(6)));
store64(&reg.a[3].hi, getSmallPositiveFloatBits(program.getEntropy(7)));
mem.ma = program.getEntropy(8) & CacheLineAlignMask;
mem.mx = program.getEntropy(10);
auto addressRegisters = program.getEntropy(12);
readReg0 = 0 + (addressRegisters & 1);
addressRegisters >>= 1;
readReg1 = 2 + (addressRegisters & 1);
addressRegisters >>= 1;
readReg2 = 4 + (addressRegisters & 1);
addressRegisters >>= 1;
readReg3 = 6 + (addressRegisters & 1);
datasetBase = program.getEntropy(14) % datasetRange;
}
template<bool softAes>
void VirtualMachine::getResult(void* scratchpad, size_t scratchpadSize, void* outHash) {
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if (scratchpadSize > 0) {
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hashAes1Rx4<softAes>(scratchpad, scratchpadSize, &reg.a);
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}
blake2b(outHash, ResultSize, &reg, sizeof(RegisterFile), nullptr, 0);
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}
template void VirtualMachine::getResult<false>(void* scratchpad, size_t scratchpadSize, void* outHash);
template void VirtualMachine::getResult<true>(void* scratchpad, size_t scratchpadSize, void* outHash);
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}