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55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
//
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// Executor.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 29/04/2022.
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// Copyright © 2022 Thomas Harte. All rights reserved.
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//
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#ifndef InstructionSets_M68k_Executor_hpp
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#define InstructionSets_M68k_Executor_hpp
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#include "Decoder.hpp"
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#include "Instruction.hpp"
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#include "Model.hpp"
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#include "Perform.hpp"
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#include "Sequence.hpp"
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#include "Status.hpp"
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namespace InstructionSet {
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namespace M68k {
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struct BusHandler {
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template <typename IntT> void write(uint32_t address, IntT value);
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template <typename IntT> IntT read(uint32_t address);
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};
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/// Ties together the decoder, sequencer and performer to provide an executor for 680x0 instruction streams.
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/// As is standard for these executors, no bus- or cache-level fidelity to any real 680x0 is attempted. This is
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/// simply an executor of 680x0 code.
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template <Model model, typename BusHandler> class Executor {
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public:
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Executor(BusHandler &);
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/// Executes the number of instructions specified;
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/// other events — such as initial reset or branching
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/// to exceptions — may be zero costed, and interrupts
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/// will not necessarily take effect immediately when signalled.
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void run_for_instructions(int);
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private:
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BusHandler &bus_handler_;
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Predecoder<model> decoder_;
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void reset();
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// Processor state.
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Status status_;
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CPU::SlicedInt32 program_counter_;
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};
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}
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}
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#endif /* InstructionSets_M68k_Executor_hpp */
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