Exception handling for applications with prefix instructions
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United States of America Patent
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Aug 27, 2019
Grant Date -
Mar 30, 2017
app pub date -
Nov 14, 2015
filing date -
Sep 30, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Managing exception handling. A plurality of instruction units of an instruction stream are selected to be decoded in parallel by a plurality of instruction decode units of a processor. The plurality of instruction units includes a prefix instruction and a prefixed instruction. The prefixed instruction is an instruction to be modified by the prefix instruction. An exception condition associated with the prefixed instruction is determined. Exception handling is performed for the prefixed instruction, in which the performing includes determining an address at which to restart execution of the instruction stream. The determining the address includes adjusting the address at which to restart execution based on the prefix instruction to be separately decoded by an instruction decode unit.
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