Patent
1996-01-11
1998-07-07
Treat, William M.
395391, 395392, 39580023, G06F 938
Patent
active
057782105
ABSTRACT:
A method and apparatus for recovering the state of a speculatively scheduled operation in a processor which cannot be executed at the speculated time allows components within the processor to begin the steps of dispatch and execution of operations based on the speculated return of data for the operations at a predetermined time. After these steps have begun for an operation, a signal is received by one or more of these components if the operation cannot be completed at the speculated time. If the operation cannot be completed at the speculated time then the operation is canceled, recovering the state of the operation prior to the beginning of the steps of dispatch and execution.
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Johnson, Mike, "Superscaler Microprocessor Design", Prentice-Hall, Inc., Englewood Cliffs, N.J., 1991, pp. i -xxiv & pp. 103-126 (Chapter 6).
Popescu, Val, Merle Schultz, John Spracklen, Gary Gibson, Bruce Lightner and David Isaman, "The Metaflow Architecture", IEEE Micro, Jun. 1991, pp. 10-13 and 63-73.
Henstrom Alexander P.
Martell Robert W.
Intel Corporation
Treat William M.
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