program.hpp

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/*
Copyright (c) 2018-2019, tevador <tevador@gmail.com>
 
All rights reserved.
 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the copyright holder nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.
 
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
 
#pragma once
 
#include <cstdint>
#include <ostream>
#include "common.hpp"
#include "instruction.hpp"
#include "blake2/endian.h"
 
namespace randomx {
 
    struct ProgramConfiguration {
        uint64_t eMask[2];
        uint32_t readReg0, readReg1, readReg2, readReg3;
    };
 
    class Program {
    public:
        Instruction& operator()(int pc) {
            return programBuffer[pc];
        }
        friend std::ostream& operator<<(std::ostream& os, const Program& p) {
            p.print(os);
            return os;
        }
        uint64_t getEntropy(int i) {
            return load64(&entropyBuffer[i]);
        }
        uint32_t getSize() {
            return RANDOMX_PROGRAM_SIZE;
        }
    private:
        void print(std::ostream& os) const {
            for (int i = 0; i < RANDOMX_PROGRAM_SIZE; ++i) {
                auto instr = programBuffer[i];
                os << instr;
            }
        }
        uint64_t entropyBuffer[16];
        Instruction programBuffer[RANDOMX_PROGRAM_SIZE];
    };
 
    static_assert(sizeof(Program) % 64 == 0, "Invalid size of class randomx::Program");
}