The disclosure describes means for allowing the sequencing of operand fetches to deviate from the conceptual sequence specified in the program. Allowing fetch sequencing deviations may improve system performance, while not causing any deviation in program execution results. Out-of-sequence (OOS) fetching...http://www.google.de/patents/US5185871?utm_source=gb-gplus-sharePatent US5185871 - Coordination of out-of-sequence fetching between multiple processors using re-execution of instructions