I guess this is what a perform looks like.

InstructionSets/x86/Perform.hpp

@@ -0,0 +1,43 @@
+//
+//  Perform.hpp
+//  Clock Signal
+//
+//  Created by Thomas Harte on 05/10/2023.
+//  Copyright © 2023 Thomas Harte. All rights reserved.
+//
+
+#ifndef Perform_h
+#define Perform_h
+
+#include "Instruction.hpp"
+
+namespace InstructionSet::x86 {
+
+/// Performs @c instruction using @c resolver to obtain to query @c registers and/or @c memory as required, using @c io for port input/output,
+/// and providing any flow control effects to @c flow_controller.
+///
+/// Any change in processor status will be applied to @c status.
+///
+/// If the template parameter @c operation is not @c Operation::Undefined then that operation will be performed, ignoring
+/// whatever is specifed in @c instruction.
+template <
+	Model model,
+	typename FlowControllerT,
+	typename DataPointerResolverT,
+	typename RegistersT,
+	typename MemoryT,
+	typename IOT,
+	Operation operation = Operation::Undefined
+> void perform(
+	const Instruction &instruction,
+	Status &status,
+	FlowControllerT &flow_controller,
+	DataPointerResolverT &resolver,
+	RegistersT &registers,
+	MemoryT &memory,
+	IOT &io
+);
+
+}
+
+#endif /* Perform_h */