The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 2000
Filed:
Sep. 17, 1998
Chiaki Takahashi, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Information Technology Co., Ltd., Kanagawa-ken, JP;
Abstract
An interrupt processing system and method for an information processing system of pipeline control type are disclosed. The occurrence of an exception is detected for each plurality of instructions to be processed in parallel. The occurrences of exceptions, when detected for a plurality of the instructions to be processed in parallel, are reported collectively according to each cause of the exceptions. In the case where the occurrences of exceptions are reported for a plurality of the instructions to be processed in parallel by an exception reporting unit, an interrupt request is issued. In response to the interrupt request, the pipeline processing is restored by an instruction control unit to the state before execution of the leading one of the plurality of the instructions to be processed in parallel for which the occurrences of exceptions are detected, and the instructions are reexecuted one by one sequentially from the leading one of the plurality of instructions through the instruction control unit. Thus, an interrupt is accurately processed upon occurrence of an exception.