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CLK/InstructionSets/PowerPC/Decoder.hpp
Thomas Harte 5f413a38df Switches all American-style dates.
I'd failed to configure my new computer appropriately, it seems.
2021-01-16 22:09:19 -05:00

57 lines
961 B
C++

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