Data processing system and method for completing out-of-order instructions
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United States of America Patent
Stats
-
Feb 23, 1999
Grant Date -
N/A
app pub date -
Apr 25, 1997
filing date -
Apr 25, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
During operation of a pipelined data processing system, an interruptible instruction table is used to store target identifiers associated with instructions which may result in speculative execution. During operation of the interruptible instruction table, a pointer, referred to as a completing instruction buffer entry pointer, points to a bottom of the interruptible instruction table if that table includes any instruction. An entry at the bottom of the interruptible instruction table is a next instruction to complete. This entry includes a target identifier, referred to as a non-speculative-non-interruptible TID, may be used to release resources held for all prior executed instructions. The data processing system determines the value of the non-speculative-non-interruptible TID to ensure that order determination is preserved and provides a true speculative execution point.
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