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40 lines
757 B
C++
40 lines
757 B
C++
//
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// Decoder.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 15/01/21.
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// Copyright © 2021 Thomas Harte. All rights reserved.
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//
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#ifndef InstructionSets_M50740_Decoder_hpp
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#define InstructionSets_M50740_Decoder_hpp
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#include "Instruction.hpp"
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#include <cstddef>
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#include <utility>
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namespace InstructionSet {
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namespace M50740 {
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class Decoder {
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public:
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std::pair<int, Instruction> decode(const uint8_t *source, size_t length);
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Instruction instrucion_for_opcode(uint8_t opcode);
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private:
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enum class Phase {
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Instruction,
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AwaitingOperand,
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ReadyToPost
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} phase_ = Phase::Instruction;
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int operand_size_ = 0, operand_bytes_ = 0;
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int consumed_ = 0;
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Instruction instr_;
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};
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}
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}
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#endif /* InstructionSets_M50740_Decoder_hpp */
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