Analysing value substitution and confidence estimation for value prediction



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Piñuel Moreno, Luis and Moreno-Vozmediano, Rafael and Tirado Fernández, Francisco (2001) Analysing value substitution and confidence estimation for value prediction. Journal of systems architecture, 47 (5). pp. 459-475. ISSN 1383-7621

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Value Prediction is one of the newest techniques used to break down ILP limits. Despite being under continuous study during the last few years, a few aspects related to this emerging technique remain unanalysed in depth. Exhaustively investigated in the context of control speculation, confidence estimation has usually played a secondary role on value prediction and speculation. Closely linked to confidence estimation, value substitution also represents a relegated subject of research. This paper is focussed on analysing, in an isolated way, the respective impact on predictor performance of both confidence estimation and value substitution mechanisms. By using detailed pipeline-level simulations, we prove that improvements in these mechanisms are as important as reducing the predictor aliasing or even improving the prediction model.

Item Type:Article
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(C) 2001 Elsevier Science B.V.

Uncontrolled Keywords:Value prediction; Control speculation; Confidence estimation.
Subjects:Sciences > Computer science
Sciences > Computer science > Computer programming
ID Code:29975
Deposited On:21 May 2015 08:32
Last Modified:31 Jul 2017 11:23

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