To provide a new operation verification method for an information processing flow, a central processing unit capable of building a plurality of virtual cores on a physical core includes: an element or part for executing, on an own virtual core, or causing another virtual core on the same physical core to execute, a reference instruction of directly referring to a current register value used by an arbitrary virtual core from the another virtual core without influence on an execution context of the arbitrary virtual core; and an element or part for switching a permission or authorization for executing the reference instruction of referring to the register value among the plurality of virtual cores.
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