Method and system for branch prediction
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United States of America Patent
Stats
-
May 15, 2001
Grant Date -
N/A
app pub date -
Aug 9, 1999
filing date -
Feb 12, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a computer a system for branch prediction is arranged. The branch prediction system uses a scanning mechanism (303) for scanning the program memory for conditional branch instructions during the running of the program. When finding such an instruction the system records during a preset time interval (311) the statistics for that specific conditional branch instruction and sets a branch prediction but in the instruction accordingly (321). The system then starts to scan for the next conditional branch instruction in the program memory. The system can also be used for updating a BHT during the running of a program. The use of the system is particularly useful in applications when a program is run for a relatively long time such as a program used in a telephone switch. The use of the system also allows for changing branch predictions during the run of a program.
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