alu.h

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#pragma once
 
#include "contur/core/error.h"
#include "contur/core/types.h"
 
namespace contur {

    class ALU
    {
        public:
        ALU() = default;
        ~ALU() = default;
 
        // Copyable, movable (no state)
        ALU(const ALU &) = default;
        ALU &operator=(const ALU &) = default;
        ALU(ALU &&) noexcept = default;
        ALU &operator=(ALU &&) noexcept = default;
 
        // Arithmetic operations

        [[nodiscard]] Result<RegisterValue> add(RegisterValue a, RegisterValue b) const noexcept;

        [[nodiscard]] Result<RegisterValue> sub(RegisterValue a, RegisterValue b) const noexcept;

        [[nodiscard]] Result<RegisterValue> mul(RegisterValue a, RegisterValue b) const noexcept;

        [[nodiscard]] Result<RegisterValue> div(RegisterValue a, RegisterValue b) const noexcept;
 
        // Logic / bitwise operations

        [[nodiscard]] Result<RegisterValue> bitwiseAnd(RegisterValue a, RegisterValue b) const noexcept;

        [[nodiscard]] Result<RegisterValue> bitwiseOr(RegisterValue a, RegisterValue b) const noexcept;

        [[nodiscard]] Result<RegisterValue> bitwiseXor(RegisterValue a, RegisterValue b) const noexcept;

        [[nodiscard]] Result<RegisterValue> shiftLeft(RegisterValue a, RegisterValue b) const noexcept;

        [[nodiscard]] Result<RegisterValue> shiftRight(RegisterValue a, RegisterValue b) const noexcept;
 
        // Comparison

        [[nodiscard]] RegisterValue compare(RegisterValue a, RegisterValue b) const noexcept;
 
        // Flag constants
 
        static constexpr RegisterValue ZERO_FLAG = 1; 
        static constexpr RegisterValue SIGN_FLAG = 2; 
    };
 
} // namespace contur