PROCESSOR AND METHOD FOR EXECUTING TASKS, MULTITASK COMPUTER PROCESSOR, CIRCUIT FOR ASSIGNING EACH RESOURCE TO TASK, METHOD FOR SHARING RESOURSCES, PROCESSOR FOR INSTRUCTION EXECUTION, MULTITASK PROCESSOR, METHOD FOR EXECUTING COMPUTER INSTRUCTION, AND MULTITASKING METHOD

摘要

PROBLEM TO BE SOLVED: To obtain an efficient pipeline processor, a multitask processor and a resource access technology by allowing an execution unit to execute the instructions of another task when the task can be executed after N pieces of instructions. ;SOLUTION: In addition to protocol conversion (e.g. ATM/Ethernet conversion), a port interface(PIF) 110 performs IP routing, layer-2 switching, or other processes determined by software executed by a PIF microcontroller 160. In this case, a processor execution unit normally starts up max. N pieces of instructions from an arbitrary given task without starting even any interposing instruction from another arbitrary task and then starts executing the instructions of another task when the task can be used for the execution after the N pieces of instructions.;COPYRIGHT: (C)1999,JPO