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EOLE: Paving the Way for an Effective Implementation of Value Prediction
Arthur Perais & André Seznec
EMETTEUR 00 MOIS 2011 6/10/2014 Arthur Perais & André Seznec - ISCA 2014
6/10/2014 Arthur Perais & André Seznec - ISCA 2014
EOLE: Paving the Way for an Effective Implementation of Value - - PowerPoint PPT Presentation
EOLE: Paving the Way for an Effective Implementation of Value - - PowerPoint PPT Presentation
EOLE: Paving the Way for an Effective Implementation of Value Prediction Arthur Perais & Andr Seznec EMETTEUR Arthur Perais & Andr Seznec - ISCA 2014 00 MOIS 2011 6/10/2014 Value Prediction (VP) [Lipasti96][Mendelson97] Sequential
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SLIDE 3
6/10/2014 Arthur Perais & André Seznec - ISCA 2014
Fetch VPredict PC n-issue Out-of-order Engine ROB IQ PRF Validation + Squashing @commit FUs
State-of-the-art Value Prediction: HPCA’14
Validation + Selective Replay @execute Remove validation and a potentially complex recovery mechanism from the OoO engine
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6/10/2014 Arthur Perais & André Seznec - ISCA 2014
Fetch VPredict PC n-issue Out-of-order Engine ROB IQ PRF Validation + Squashing @commit FUs
State-of-the-art VP and the Physical Register File
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6/10/2014 Arthur Perais & André Seznec - ISCA 2014
Fetch VPredict PC Less than n-issue Out-of-order Engine ROB IQ Bank 0 Validation + Squashing @commit FUs Rename Early Exec Late Execution Predictions Bank 1 Bank 2 Bank 3
{Early | OoO | Late} Execute to Relieve Pressure
As many ports as the baseline, but with VP!
- Offload Execution from OoO.
- Reduce issue-width.
- Bank the PRF.