2019-04-11 18:46:35 +00:00
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/*
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Copyright (c) 2019 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 <iostream>
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#include <cstdint>
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#include <vector>
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#include <unordered_set>
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2019-04-20 22:50:57 +00:00
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#include "../superscalar.hpp"
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#include "../common.hpp"
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2019-04-11 18:46:35 +00:00
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const uint8_t seed[32] = { 191, 182, 222, 175, 249, 89, 134, 104, 241, 68, 191, 62, 162, 166, 61, 64, 123, 191, 227, 193, 118, 60, 188, 53, 223, 133, 175, 24, 123, 230, 55, 74 };
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int main() {
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std::cout << "THIS PROGRAM REQUIRES MORE THAN 10 GB OF RAM TO COMPLETE" << std::endl;
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std::vector<uint64_t> dummy;
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constexpr uint64_t superscalarMul0 = 6364136223846793005ULL;
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constexpr uint64_t superscalarAdd1 = 9298410992540426748ULL; //9298410992540426048ULL
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constexpr uint64_t superscalarAdd2 = 12065312585734608966ULL;
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constexpr uint64_t superscalarAdd3 = 9306329213124610396ULL;
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constexpr uint64_t superscalarAdd4 = 5281919268842080866ULL;
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constexpr uint64_t superscalarAdd5 = 10536153434571861004ULL;
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constexpr uint64_t superscalarAdd6 = 3398623926847679864ULL;
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constexpr uint64_t superscalarAdd7 = 9549104520008361294ULL;
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2019-04-20 22:50:57 +00:00
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constexpr uint32_t totalBlocks = RANDOMX_DATASET_SIZE / randomx::CacheLineSize;
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2019-04-11 18:46:35 +00:00
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std::unordered_set<uint64_t> registerValues;
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registerValues.reserve(totalBlocks);
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registerValues.rehash(totalBlocks);
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int collisionCount[9] = { 0 };
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for (uint32_t blockNumber = 0; blockNumber < totalBlocks; ++blockNumber) {
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uint64_t rl[8];
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rl[0] = (blockNumber + 1) * superscalarMul0;
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rl[1] = rl[0] ^ superscalarAdd1;
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rl[2] = rl[0] ^ superscalarAdd2;
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rl[3] = rl[0] ^ superscalarAdd3;
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rl[4] = rl[0] ^ superscalarAdd4;
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rl[5] = rl[0] ^ superscalarAdd5;
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rl[6] = rl[0] ^ superscalarAdd6;
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rl[7] = rl[0] ^ superscalarAdd7;
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int blockCollisions = 0;
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for (int i = 0; i < 8; ++i) {
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uint64_t reducedValue = rl[i] & 0x3FFFFFFFFFFFF8; //bits 3-53 only
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if (registerValues.find(reducedValue) != registerValues.end()) {
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blockCollisions++;
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std::cout << "Block " << blockNumber << ": collision of register r" << i << std::endl;
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}
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else {
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registerValues.insert(reducedValue);
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}
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}
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collisionCount[blockCollisions]++;
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if ((blockNumber % (320 * 1024)) == 0)
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std::cout << "Block " << blockNumber << " processed" << std::endl;
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}
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for (int i = 0; i < 9; ++i) {
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std::cout << i << " register(s) collide in " << collisionCount[i] << " blocks" << std::endl;
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}
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return 0;
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}
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