DEVICE, METHOD AND SYSTEM TO PROVIDE A PREDICTED VALUE WITH A SEQUENCE OF MICRO-OPERATIONS

Techniques and mechanisms for efficiently making value prediction information available for use by in a processor. In an embodiment, the instruction execution is to include a loading of some data to a first location (e.g., a first register). A decoder of the processor accesses reference information...

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Hauptverfasser: Bandishte, Sumeet, Shtiegmann, Elad, Gaur, Jayesh, Rappoport, Lihu, Shwartsman, Stanislav, Sperber, Zeev
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creator Bandishte, Sumeet
Shtiegmann, Elad
Gaur, Jayesh
Rappoport, Lihu
Shwartsman, Stanislav
Sperber, Zeev
description Techniques and mechanisms for efficiently making value prediction information available for use by in a processor. In an embodiment, the instruction execution is to include a loading of some data to a first location (e.g., a first register). A decoder of the processor accesses reference information which indicates that the execution is to comprise multiple micro-operations (µops) including a LoadCheck µop and a Move µop. The LoadCheck µop loads a first value to the first location, and checks whether the loaded first value is the same as a previously-determined second value which represents a prediction of what the first value would be. The Move µop moves the second value to the first location. In another embodiment, the Move µop is scheduled for execution out-of-order with respect to the LoadCheck µοp, resulting in an early availability of the second value for access in a register file by another µop.
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subjects CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
title DEVICE, METHOD AND SYSTEM TO PROVIDE A PREDICTED VALUE WITH A SEQUENCE OF MICRO-OPERATIONS
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