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136 lines
5.1 KiB
136 lines
5.1 KiB
/*
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Copyright (c) 2018 tevador
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This file is part of RandomX.
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RandomX is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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RandomX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with RandomX. If not, see<http://www.gnu.org/licenses/>.
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*/
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#include <cstring>
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#include <iomanip>
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#include <stdexcept>
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#include "virtual_machine.hpp"
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#include "common.hpp"
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#include "aes_hash.hpp"
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#include "blake2/blake2.h"
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#include "intrin_portable.h"
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#include "allocator.hpp"
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randomx_vm::~randomx_vm() {
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}
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void randomx_vm::resetRoundingMode() {
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initFpu();
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}
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constexpr int mantissaSize = 52;
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constexpr int exponentSize = 11;
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constexpr uint64_t mantissaMask = (1ULL << mantissaSize) - 1;
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constexpr uint64_t exponentMask = (1ULL << exponentSize) - 1;
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constexpr int exponentBias = 1023;
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static inline uint64_t getSmallPositiveFloatBits(uint64_t entropy) {
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auto exponent = entropy >> 59; //0..31
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auto mantissa = entropy & mantissaMask;
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exponent += exponentBias;
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exponent &= exponentMask;
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exponent <<= mantissaSize;
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return exponent | mantissa;
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}
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void randomx_vm::initialize() {
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store64(®.a[0].lo, getSmallPositiveFloatBits(program.getEntropy(0)));
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store64(®.a[0].hi, getSmallPositiveFloatBits(program.getEntropy(1)));
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store64(®.a[1].lo, getSmallPositiveFloatBits(program.getEntropy(2)));
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store64(®.a[1].hi, getSmallPositiveFloatBits(program.getEntropy(3)));
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store64(®.a[2].lo, getSmallPositiveFloatBits(program.getEntropy(4)));
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store64(®.a[2].hi, getSmallPositiveFloatBits(program.getEntropy(5)));
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store64(®.a[3].lo, getSmallPositiveFloatBits(program.getEntropy(6)));
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store64(®.a[3].hi, getSmallPositiveFloatBits(program.getEntropy(7)));
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mem.ma = program.getEntropy(8) & randomx::CacheLineAlignMask;
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mem.mx = program.getEntropy(10);
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auto addressRegisters = program.getEntropy(12);
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config.readReg0 = 0 + (addressRegisters & 1);
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addressRegisters >>= 1;
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config.readReg1 = 2 + (addressRegisters & 1);
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addressRegisters >>= 1;
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config.readReg2 = 4 + (addressRegisters & 1);
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addressRegisters >>= 1;
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config.readReg3 = 6 + (addressRegisters & 1);
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//datasetBase = program.getEntropy(13) % datasetRange;
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constexpr uint64_t mask22bit = (1ULL << 22) - 1;
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constexpr uint64_t maskExp240 = ieee_get_exponent_mask<-240>();
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store64(&config.eMask[0], (program.getEntropy(14) & mask22bit) | maskExp240);
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store64(&config.eMask[1], (program.getEntropy(15) & mask22bit) | maskExp240);
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}
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//TODO
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std::ostream& operator<<(std::ostream& os, const randomx::RegisterFile& rf) {
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for (int i = 0; i < randomx::RegistersCount; ++i)
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os << std::hex << "r" << i << " = " << rf.r[i] << std::endl << std::dec;
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for (int i = 0; i < 4; ++i)
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os << std::hex << "f" << i << " = " << *(uint64_t*)&rf.f[i].hi << " (" << rf.f[i].hi << ")" << std::endl
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<< " = " << *(uint64_t*)&rf.f[i].lo << " (" << rf.f[i].lo << ")" << std::endl << std::dec;
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for (int i = 0; i < 4; ++i)
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os << std::hex << "e" << i << " = " << *(uint64_t*)&rf.e[i].hi << " (" << rf.e[i].hi << ")" << std::endl
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<< " = " << *(uint64_t*)&rf.e[i].lo << " (" << rf.e[i].lo << ")" << std::endl << std::dec;
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for (int i = 0; i < 4; ++i)
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os << std::hex << "a" << i << " = " << *(uint64_t*)&rf.a[i].hi << " (" << rf.a[i].hi << ")" << std::endl
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<< " = " << *(uint64_t*)&rf.a[i].lo << " (" << rf.a[i].lo << ")" << std::endl << std::dec;
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return os;
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}
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namespace randomx {
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alignas(16) volatile static __m128i aesDummy;
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template<class Allocator, bool softAes>
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VmBase<Allocator, softAes>::~VmBase() {
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Allocator::freeMemory(scratchpad, ScratchpadSize);
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}
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template<class Allocator, bool softAes>
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void VmBase<Allocator, softAes>::allocate() {
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if (mem.memory == nullptr)
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throw std::invalid_argument("Cache/Dataset not set");
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if (!softAes) { //if hardware AES is not supported, it's better to fail now than to return a ticking bomb
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__m128i tmp = _mm_load_si128((const __m128i*)&aesDummy);
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tmp = _mm_aesenc_si128(tmp, tmp);
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_mm_store_si128((__m128i*)&aesDummy, tmp);
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}
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scratchpad = (uint8_t*)Allocator::allocMemory(ScratchpadSize);
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}
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template<class Allocator, bool softAes>
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void VmBase<Allocator, softAes>::getFinalResult(void* out, size_t outSize) {
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hashAes1Rx4<softAes>(scratchpad, ScratchpadSize, ®.a);
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blake2b(out, outSize, ®, sizeof(RegisterFile), nullptr, 0);
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}
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template<class Allocator, bool softAes>
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void VmBase<Allocator, softAes>::initScratchpad(void* seed) {
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fillAes1Rx4<softAes>(seed, ScratchpadSize, scratchpad);
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}
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template<class Allocator, bool softAes>
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void VmBase<Allocator, softAes>::generateProgram(void* seed) {
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fillAes1Rx4<softAes>(seed, sizeof(program), &program);
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}
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template class VmBase<AlignedAllocator<CacheLineSize>, false>;
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template class VmBase<AlignedAllocator<CacheLineSize>, true>;
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template class VmBase<LargePageAllocator, false>;
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template class VmBase<LargePageAllocator, true>;
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} |