G - Physics – 06 – F
Patent
G - Physics
06
F
354/230, 354/67
G06F 15/76 (2006.01) G06F 9/46 (2006.01)
Patent
CA 1317027
ABSTRACT OF THE DISCLOSURE The invention relates to a method and apparatus to minimize the time a data processing system spends on saving and restoring vector processor state data during a context switch. A context switch occurs when execution of an old process is suspended and execution of a current process is begun. The vector state data associated with the old process remains in the vector processor until the current process attempts to execute a vector instruc- tion. When this occurs, the vector state data associated with the old process is saved and vector state data associated with the current process is restored, if the old process is not the same as the current process. If the old process is the same as the current process, there is no need to save and restore any vector state data.
594165
Bhandarkar Dileep P.
Cardoza Wayne
Cutler David N.
Orbits David A.
Witek Rich
Digital Equipment Corporation
Smart & Biggar
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