Method and apparatus for predicting loop exit branches
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United States of America Patent
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Aug 20, 2002
Grant Date -
Jun 27, 2002
app pub date -
Oct 12, 1998
filing date -
Oct 12, 1998
priority date (Note) -
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Abstract
A loop branch prediction system is provided to predict a final iteration of a loop and resteer an associated fetch module to an appropriate target address. The loop prediction system includes a counter and an end of loop (EOL) module. In one mode, the counter tracks loop branches in process. When a termination condition is detected, the counter switches to a second mode to track the number of loop branches still to be issued. The EOL module compares the number of loop branches still to be issued with one or more threshold values and generates a resteer signal when a match is detected.
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