Added RandomX code here

RandomX/src/tests/scratchpad-entropy.cpp

@@ -0,0 +1,50 @@
+#include <string>
+#include <iostream>
+#include "utility.hpp"
+#include "../randomx.h"
+#include "../virtual_machine.hpp"
+#include "../blake2/endian.h"
+
+/*
+	Writes final scratchpads to disk as files with .spad extension, each file is 2048 KiB.
+	Command line parameters:
+		--count N         number of files to generate (default = 1)
+		--seed S          different seed will give different outputs (default = 0)
+
+	Entropy can be estimated by compressing the files using 7zip in Ultra mode:
+
+	    7z.exe a -t7z -m0=lzma2 -mx=9 scratchpads.7z *.spad
+*/
+
+int main(int argc, char** argv) {
+	int count, seedValue;
+
+	readIntOption("--count", argc, argv, count, 1);
+	readIntOption("--seed", argc, argv, seedValue, 0);
+
+	std::cout << "Generating " << count << " scratchpad(s) using seed " << seedValue << " ..." << std::endl;
+
+	char seed[4];
+	char input[4];
+	char hash[RANDOMX_HASH_SIZE];
+
+	store32(&seed, seedValue);
+
+	randomx_cache *cache = randomx_alloc_cache(RANDOMX_FLAG_DEFAULT);
+	randomx_init_cache(cache, &seed, sizeof seed);
+	randomx_vm *vm = randomx_create_vm(RANDOMX_FLAG_DEFAULT, cache, NULL);
+
+	for (int i = 0; i < count; ++i) {
+		store32(&input, i);
+		randomx_calculate_hash(vm, &input, sizeof input, hash);
+		std::string filename("test-");
+		filename += std::to_string(i);
+		filename += ".spad";
+		dump((const char*)vm->getScratchpad(), randomx::ScratchpadSize, filename.c_str());
+	}
+
+	randomx_destroy_vm(vm);
+	randomx_release_cache(cache);
+
+	return 0;
+}