Taking corrective action in computer programs during instruction processing
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United States of America Patent
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-
Jan 2, 2001
Grant Date -
N/A
app pub date -
Apr 13, 1998
filing date -
Aug 27, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A standardized test environment assists identifying problematic instances of instructions in computer programs that produce erroneous results. A standardized production environment takes corrective action for selected instructions by intercepting instruction processing during instruction fetch, instruction decode or instruction execution and modifying one or more values such that the instructions achieve correct results. In one embodiment of a test environment, a computer system collects diagnostic information for designated instructions such as subtraction operations that produce negative results. In one embodiment of a production environment, a computer system intercepts instruction processing for instructions at specified locations in a program and takes corrective action according to information obtained from a table of control information.
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