A very long instruction word (VLIW) architecture describes a processor comprising multiple functional units operating in parallel. A very long instruction word contains a plurality of fields or issue slots for specifying which operations are to be performed by the functional units. Execution of an operation...http://www.google.de/patents/US5974537?utm_source=gb-gplus-sharePatent US5974537 - Guard bits in a VLIW instruction control routing of operations to functional units allowing two issue slots to specify the same functional unit
