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45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
//
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// Perform.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 28/04/2022.
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// Copyright © 2022 Thomas Harte. All rights reserved.
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//
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#ifndef InstructionSets_M68k_Perform_h
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#define InstructionSets_M68k_Perform_h
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#include "Model.hpp"
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#include "Instruction.hpp"
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#include "Status.hpp"
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#include "../../Numeric/RegisterSizes.hpp"
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namespace InstructionSet {
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namespace M68k {
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struct NullFlowController {
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void raise_exception(int) {}
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void consume_cycles(int) {}
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};
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/// Performs @c instruction using @c source and @c dest (which mmay be ignored as per the semantics of the operation).
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/// And change in processor status will be applied to @c status. If this operation raises an exception, causes a
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/// branch, or consumes additional cycles due to the particular value of the operands (on the 68000, think DIV or MUL),
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/// that'll be notified to the @c flow_controller.
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///
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/// If the template parameter @c operation is not @c Operation::Undefined then that operation will be performed, ignoring
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/// whatever is specifed in @c instruction. This allows selection either at compile time or at run time; per Godbolt all modern
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/// compilers seem to be smart enough fully to optimise the compile-time case.
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template <
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Model model,
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typename FlowController,
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Operation operation = Operation::Undefined
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> void perform(Preinstruction instruction, CPU::RegisterPair32 &source, CPU::RegisterPair32 &dest, Status &status, FlowController &flow_controller);
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}
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}
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#include "Implementation/PerformImplementation.hpp"
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#endif /* InstructionSets_M68k_Perform_h */
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