Method and apparatus for generating event handler vectors based on both operating mode and event type
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United States of America Patent
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Mar 30, 1999
Grant Date -
N/A
app pub date -
Jul 1, 1995
filing date -
Jul 1, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for handling events, such as those which occur in a processor. An event vector is formed by combining event type information indicating a type of event in the processor and mode information indicating an operating mode of the processor. A microcode event handler vector is generated therefrom, for example, by referencing a lookup table. The microcode event handler vector is then used for invoking a microcode event handler to handle occurrence of these events in the processor. By the formation of an event vector, and the microcode event handler vector, execution performance is increased due to avoiding conditional branching within the processor, such as modem high performance architectures, including those which execute instructions in and out-of-order.
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