Patent
1996-10-15
1999-01-12
Eng, David Y.
G06I 946
Patent
active
058600140
ABSTRACT:
A method and apparatus for maintaining content of registers of a processor which uses the registers for processing instructions. Entries are stored in a buffer for restoring register content in response to an interruption by an interruptible instruction. Entries include information for reducing the number of entries selected for the restoring. A set of the buffer entries is selected, in response to the interruption and the information, for restoring register content. The set includes only entries which are necessary for restoring the content in response to the interruption so that the content of the processor registers may be restored in a single processor cycle, even if multiple entries are stored for a first one of the registers and multiple entries are stored for a second one of the registers.
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Cheong Hoichi
Le Hung Qui
Muhich John Stephen
White Steven Wayne
Eng David Y.
England Anthony V. S.
International Business Machines - Corporation
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