/*
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 "utility.hpp"
#include "../common.hpp"
#include "../assembly_generator_x86.hpp"
#include "../superscalar.hpp"
#include "../aes_hash.hpp"
#include "../blake2/blake2.h"
#include "../program.hpp"

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 };

const uint8_t blockTemplate_[] = {
		0x07, 0x07, 0xf7, 0xa4, 0xf0, 0xd6, 0x05, 0xb3, 0x03, 0x26, 0x08, 0x16, 0xba, 0x3f, 0x10, 0x90, 0x2e, 0x1a, 0x14,
		0x5a, 0xc5, 0xfa, 0xd3, 0xaa, 0x3a, 0xf6, 0xea, 0x44, 0xc1, 0x18, 0x69, 0xdc, 0x4f, 0x85, 0x3f, 0x00, 0x2b, 0x2e,
		0xea, 0x00, 0x00, 0x00, 0x00, 0x77, 0xb2, 0x06, 0xa0, 0x2c, 0xa5, 0xb1, 0xd4, 0xce, 0x6b, 0xbf, 0xdf, 0x0a, 0xca,
		0xc3, 0x8b, 0xde, 0xd3, 0x4d, 0x2d, 0xcd, 0xee, 0xf9, 0x5c, 0xd2, 0x0c, 0xef, 0xc1, 0x2f, 0x61, 0xd5, 0x61, 0x09
};

template<bool softAes>
void generateAsm(uint32_t nonce) {
	alignas(16) uint64_t hash[8];
	uint8_t blockTemplate[sizeof(blockTemplate_)];
	memcpy(blockTemplate, blockTemplate_, sizeof(blockTemplate));
	store32(blockTemplate + 39, nonce);
	blake2b(hash, sizeof(hash), blockTemplate, sizeof(blockTemplate), nullptr, 0);
	uint8_t scratchpad[randomx::ScratchpadSize];
	fillAes1Rx4<softAes>((void*)hash, randomx::ScratchpadSize, scratchpad);
	randomx::AssemblyGeneratorX86 asmX86;
	randomx::Program p;
	fillAes1Rx4<softAes>(hash, sizeof(p), &p);
	asmX86.generateProgram(p);
	asmX86.printCode(std::cout);
}

template<bool softAes>
void generateNative(uint32_t nonce) {
	alignas(16) uint64_t hash[8];
	uint8_t blockTemplate[sizeof(blockTemplate_)];
	memcpy(blockTemplate, blockTemplate_, sizeof(blockTemplate));
	store32(blockTemplate + 39, nonce);
	blake2b(hash, sizeof(hash), blockTemplate, sizeof(blockTemplate), nullptr, 0);
	uint8_t scratchpad[randomx::ScratchpadSize];
	fillAes1Rx4<softAes>((void*)hash, randomx::ScratchpadSize, scratchpad);
	alignas(16) randomx::Program prog;
	fillAes1Rx4<softAes>((void*)hash, sizeof(prog), &prog);
	for (int i = 0; i < RANDOMX_PROGRAM_SIZE; ++i) {
		prog(i).dst %= 8;
		prog(i).src %= 8;
	}
	std::cout << prog << std::endl;
}

void printUsage(const char* executable) {
	std::cout << "Usage: " << executable << " [OPTIONS]" << std::endl;
	std::cout << "Supported options:" << std::endl;
	std::cout << "  --softAes         use software AES (default: x86 AES-NI)" << std::endl;
	std::cout << "  --nonce  N        seed nonce (default: 1000)" << std::endl;
	std::cout << "  --genAsm          generate x86-64 asm code for nonce N" << std::endl;
	std::cout << "  --genNative       generate RandomX code for nonce N" << std::endl;
	std::cout << "  --genSuperscalar  generate superscalar program for nonce N" << std::endl;
}

int main(int argc, char** argv) {
	bool softAes, genAsm, genNative, genSuperscalar;
	int nonce;

	readOption("--softAes", argc, argv, softAes);
	readOption("--genAsm", argc, argv, genAsm);
	readIntOption("--nonce", argc, argv, nonce, 1000);
	readOption("--genNative", argc, argv, genNative);
	readOption("--genSuperscalar", argc, argv, genSuperscalar);

	if (genSuperscalar) {
		randomx::SuperscalarProgram p;
		randomx::Blake2Generator gen(seed, nonce);
		randomx::generateSuperscalar(p, gen);
		randomx::AssemblyGeneratorX86 asmX86;
		asmX86.generateAsm(p);
		asmX86.printCode(std::cout);
		return 0;
	}

	if (genAsm) {
		if (softAes)
			generateAsm<true>(nonce);
		else
			generateAsm<false>(nonce);
		return 0;
	}

	if (genNative) {
		if (softAes)
			generateNative<true>(nonce);
		else
			generateNative<false>(nonce);
		return 0;
	}

	printUsage(argv[0]);
	return 0;
}