Instruction swap for patching problematic instructions in a microprocessor

There is provided a method and system for replacing an instruction with another instruction. A match register stores an opcode that identifies an instruction to be replaced. A swap register stores an instruction that replaces the identified instruction. A multiplexer chooses the instruction stored i...

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Bibliographische Detailangaben
Hauptverfasser: DOING RICHARD W, TINGEN JAMES O, HALL RONALD, VENTON TODD A, MAGILL KEVIN N
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:There is provided a method and system for replacing an instruction with another instruction. A match register stores an opcode that identifies an instruction to be replaced. A swap register stores an instruction that replaces the identified instruction. A multiplexer chooses the instruction stored in the swap register over the identified instruction if predecode bits of the identified instruction are set.