Electrical computers and digital processing systems: processing – Processing control – Arithmetic operation instruction processing
Reexamination Certificate
2007-09-11
2007-09-11
Chan, Eddie (Department: 2183)
Electrical computers and digital processing systems: processing
Processing control
Arithmetic operation instruction processing
Reexamination Certificate
active
10835484
ABSTRACT:
A method, apparatus, and computer instructions in a processor for performing arithmetic operations. A data type associated with a particular memory location is used to determine if an operation about to be performed on the data in that location is legal. If the operation requires the data to have a required data type, a determination is made as to whether the operation is a legal operation based on the identified data type and the required data type. If the operation is not legal on the identified type, a determination is made as to whether data can be cast to change the identified data type to the required data type. The data is cast to the required data type if the data can be cast to form modified data, and the arithmetic operation is performed on the modified data. If the data cannot be cast to the Required type, an exception or interrupt is generated.
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Alexander, III William Preston
Dimpsey Robert Tod
Levine Frank Eliot
Urquhart Robert John
Chan Eddie
International Business Machines - Corporation
Lammes Francis
Petranek Jacob
Rodriguez Herman
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