Processor having plurality of functional units for orderly retiring outstanding operations based upon its associated tags
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 6, 1993
Issued Date -
N/A
app pub date -
Feb 21, 1990
filing date -
Feb 24, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pipeline control system is distributed over the functional units (15, 17, 20, 25) in a processor (10). Decoder logic (12) issues operations, each with an associated tag, to the functional units, with up to n operations allowed to be outstanding. The units execute the operations and report termination information back to the decoder logic, but do not irrevocably change the state of the machine. Based on the termination information, the decoder logic retires normally terminated operations in order. If an operation terminates abnormally, the decoder logic instructs the units to back out of those operations that include and are later than the operation that terminated abnormally.
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