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57 lines
961 B
C++
57 lines
961 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 30/12/20.
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// Copyright © 2020 Thomas Harte. All rights reserved.
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//
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#ifndef InstructionSets_PowerPC_Decoder_hpp
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#define InstructionSets_PowerPC_Decoder_hpp
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#include "Instruction.hpp"
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namespace InstructionSet {
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namespace PowerPC {
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enum class Model {
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/// i.e. 32-bit, with POWER carry-over instructions.
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MPC601,
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/// i.e. 32-bit, no POWER instructions.
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MPC603,
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/// i.e. 64-bit.
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MPC620,
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};
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/*!
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Implements PowerPC instruction decoding.
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This is an experimental implementation; it has not yet undergone significant testing.
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*/
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struct Decoder {
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public:
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Decoder(Model model);
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Instruction decode(uint32_t opcode);
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private:
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Model model_;
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bool is64bit() const {
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return model_ == Model::MPC620;
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}
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bool is32bit() const {
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return !is64bit();
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}
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bool is601() const {
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return model_ == Model::MPC601;
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}
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};
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}
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}
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#endif /* InstructionSets_PowerPC_Decoder_hpp */
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