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RandomX/src/tests/superscalar-avalanche.cpp

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/*
Copyright (c) 2019 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 <iostream>
#include <cstdint>
#include <vector>
#include "../superscalar.hpp"
#include "../intrin_portable.h"
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 };
int main() {
int insensitiveProgCount[64] = { 0 };
std::vector<uint64_t> dummy;
for (int bit = 0; bit < 64; ++bit) {
for (int i = 0; i < 10000; ++i) {
uint64_t ra[8] = {
6364136223846793005ULL,
9298410992540426748ULL,
12065312585734608966ULL,
9306329213124610396ULL,
5281919268842080866ULL,
10536153434571861004ULL,
3398623926847679864ULL,
9549104520008361294ULL,
};
uint64_t rb[8];
memcpy(rb, ra, sizeof rb);
rb[0] ^= (1ULL << bit);
randomx::SuperscalarProgram p;
randomx::Blake2Generator gen(seed, sizeof seed, i);
randomx::generateSuperscalar(p, gen);
randomx::executeSuperscalar(ra, p, nullptr);
randomx::executeSuperscalar(rb, p, nullptr);
uint64_t diff = 0;
for (int j = 0; j < 8; ++j) {
diff += __popcnt64(ra[j] ^ rb[j]);
}
if (diff < 192 || diff > 320) {
std::cout << "Seed: " << i << " diff = " << diff << std::endl;
insensitiveProgCount[bit]++;
}
}
}
for (int bit = 0; bit < 64; ++bit) {
std::cout << bit << " " << insensitiveProgCount[bit] << std::endl;
}
return 0;
}