Method and apparatus for predicting conditional branch instruction outcome based on branch condition test type
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 8, 2001
Grant Date -
N/A
app pub date -
Dec 2, 1998
filing date -
Dec 2, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus and method for improving the execution of conditional branch instructions is provided. A static branch predictor makes predictions about the outcomes of branch instructions based upon a combination of the test type (such as jump on overflow, jump if negative, jump if zero, jump on carry, etc.) and the sign of the displacement of the branch instruction. If the test type of the branch instruction is one of a subset of test types from which the branch outcome can accurately be predicted solely from the test type, then the predictor makes such a prediction. Otherwise, the predictor makes a prediction based upon the sign of the displacement used to calculate the branch target address. In this case, backward jumps are predicted taken and forward jumps are predicted not taken.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully