Managing instruction execution in order to accommodate a physical clock value in a clock representation

摘要

A physical clock is expanded to enhance its precision. Existing instructions are capable of using the enhanced physical clock. Execution of an instruction begins, which places a value of the expanded physical clock in a physical clock field of a clock representation. The physical clock field is, however, unable to accommodate the value provided by the expanded physical clock. Thus, that value encroaches upon another predefined field of the clock representation. Completion of the instruction is therefore delayed such that the value provided by the expanded physical clock can be accommodated in the clock representation and a correct value for the another predefined field can be provided.