Electrical computers and digital processing systems: processing – Processing control – Branching
Reexamination Certificate
2007-04-03
2007-04-03
Treat, William M. (Department: 2181)
Electrical computers and digital processing systems: processing
Processing control
Branching
C712S228000
Reexamination Certificate
active
11055193
ABSTRACT:
A method for creating precise exceptions including checkpointing an exception causing instruction. The checkpointing results in a current checkpointed state. The current checkpointed state is locked. It is determined if any of a plurality of registers require restoration to the current checkpointed state. One or more of the registers are restored to the current checkpointed state in response to the results of the determining indicating that the one or more registers require the restoring. The execution unit is restarted at the exception handler or the next sequential instruction dependent on whether traps are enabled for the exception.
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Busaba Fadi Y.
Mack Michael J.
Rell, Jr. John G.
Schwarz Eric M.
Shum Chung-Lung K.
Cantor & Colburn LLP
Treat William M.
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