55 lines
2.1 KiB
C++
55 lines
2.1 KiB
C++
#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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#include "../superscalar.hpp"
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#include "../common.hpp"
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int main() {
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std::cout << "THIS PROGRAM REQUIRES MORE THAN 16 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 = 0x810A978A59F5A1FC; //9298410992540426748ULL; //9298410992540426048ULL
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constexpr uint64_t superscalarAdd2 = 12065312585734608966ULL;
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constexpr uint64_t superscalarAdd3 = 0x8126B91CBF22495C; //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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constexpr uint32_t totalItems = randomx::DatasetSize / randomx::CacheLineSize;
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std::unordered_set<uint64_t> registerValues;
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registerValues.reserve(totalItems);
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registerValues.rehash(totalItems);
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int collisionCount[9] = { 0 };
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for (uint32_t itemNumber = 0; itemNumber < totalItems; ++itemNumber) {
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uint64_t rl[8];
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rl[0] = (itemNumber + 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 << "Item " << itemNumber << ": 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 ((itemNumber % (320 * 1024)) == 0)
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std::cout << "Item " << itemNumber << " 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] << " items" << std::endl;
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}
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return 0;
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} |