Methods and apparatus for proactive branch target address...

Details Methods and apparatus for proactive branch target address... Methods and apparatus for proactive branch target address...

G - Physics

06

F

G06F 9/38 (2006.01)

Patent

CA 2654231

A multiple stage branch prediction system including a branch target address cache (BTAC) and a branch predictor circuit is disclosed. The BTAC is configured to store a BTAC entry. The branch predictor circuit is configured to store state information. The branch predictor circuit utilizes the state information to predict the direction of a branch instruction and to manage the BTAC entry based on the stored state information in response to actual resolution of the branch instruction.

La présente invention décrit un système de prédiction de branchement à plusieurs étapes incluant une mémoire cache d'adresse cible de branchement (BTAC) et un circuit de prédiction de branchement. La BTAC est configurée pour stocker une entrée BTAC. Le circuit de prédiction de branchement est configuré pour stocker des informations d'état. Le circuit de prédiction de branchement utilise les informations d'état pour prédire la direction d'une instruction de branchement et pour gérer l'entrée BTAC en se basant sur les informations d'état stockées en réponse à la résolution réelle de l'instruction de branchement.

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