Electrical computers and digital processing systems: processing – Processing control – Branching
Reexamination Certificate
2006-08-15
2006-08-15
Chan, Eddie (Department: 2183)
Electrical computers and digital processing systems: processing
Processing control
Branching
C712S244000, C712S240000
Reexamination Certificate
active
07093111
ABSTRACT:
A method and system for recovering a global history vector. In the event of a non-branch flush, a tag may be received by a queue configured to store information about branch instructions. The queue may read a copy of the global history vector from an entry indexed by the tag. This copy may be inserted in a global history vector mechanism (“GHV mechanism”) configured to manage the global history vector. If the flush operation is a flush to a group of instructions that contains no branch instructions and the tag does not equal the next-to-write pointer in the queue, then the queue may transmit a command to the GHV mechanism to enter a mode where the GHV mechanism does not update the global history vector until the next branch instruction is fetched.
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Frommer Scott B.
Sinharoy Balaram
Chan Eddie
Rizzuto Kevin P.
Salys Casimer K.
Voigt, Jr. Robert A.
Winstead Sechrest & Minick P.C.
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