Electrical computers and digital processing systems: processing – Dynamic instruction dependency checking – monitoring or... – Commitment control or register bypass
Reexamination Certificate
2007-08-01
2010-10-26
Coleman, Eric (Department: 2183)
Electrical computers and digital processing systems: processing
Dynamic instruction dependency checking, monitoring or...
Commitment control or register bypass
Reexamination Certificate
active
07822951
ABSTRACT:
A system and method for data forwarding from a store instruction to a load instruction during out-of-order execution, when the load instruction address matches against multiple older uncommitted store addresses or if the forwarding fails during the first pass due to any other reason. In a first pass, the youngest store instruction in program order of all store instructions older than a load instruction is found and an indication to the store buffer entry holding information of the youngest store instruction is recorded. In a second pass, the recorded indication is used to index the store buffer and the store bypass data is forwarded to the load instruction. Simultaneously, it is verified if no new store, younger than the previously identified store and older than the load has not been issued due to out-of-order execution.
REFERENCES:
patent: 5619662 (1997-04-01), Steely, Jr. et al.
patent: 5764946 (1998-06-01), Tran et al.
patent: 5781752 (1998-07-01), Moshovos et al.
patent: 6122727 (2000-09-01), Witt
patent: 6212622 (2001-04-01), Witt
patent: 6212623 (2001-04-01), Witt
patent: 6405305 (2002-06-01), Meier et al.
patent: 6694424 (2004-02-01), Keller et al.
patent: 6845442 (2005-01-01), Lepak et al.
patent: 6928534 (2005-08-01), Yeluri
patent: 7590825 (2009-09-01), Krimer et al.
patent: 2002/0188829 (2002-12-01), Senter et al.
patent: 2004/0044881 (2004-03-01), Maier et al.
Lauterbach Gary
Ramani Krishnan
Advanced Micro Devices , Inc.
Coleman Eric
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Rankin Rory D.
LandOfFree
System and method of load-store forwarding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method of load-store forwarding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method of load-store forwarding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4187855