Method and apparatus for scheduling the dispatch of instructions

Details Method and apparatus for scheduling the dispatch of instructions Method and apparatus for scheduling the dispatch of instructions

1993-12-27

1996-05-21

Heckler, Thomas M.

Boots, shoes, and leggings

364DIG1, 3642818, G06F 906

Patent

active

055198643

ABSTRACT:
Entries in a reservation station are efficiently scanned to find data-ready instructions for dispatch. A pseudo-FIFO scheduling approach is implemented wherein, rather than scanning every entry in the reservation station, the reservation station is segmented into groups of entries with each entry being scanned to determine which has the oldest entry in it. It is from the group of entries having the oldest entry that a ready pointer is cycled to search for data-ready instructions for dispatch to waiting execution units.

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M. Johnson, Superscalar Microprocessor Design, Prentice Hall, Inc., Chapters 3 and 7, (1991).
Popescu, et al., "The Metaflow Architecture, " IEEE Micro, pp. 10-13 and 63-73, Jun. 1991.

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