Patent · US Active

Loop exit predictor

US11216279B2 · kind B2 · utility

0Cited by

2References

20Claims

0Family size

Assignee

Advanced Micro Devices, Inc. · US

Inventors

Anthony Jarvis · Acton, US
Thomas Clouqueur · Boxborough, US

Key dates

Filing date	Nov 26, 2018
Grant date	Jan 4, 2022
Priority date	—
Expiry date	Nov 26, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG06F9/325
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A processor includes a prediction engine coupled to a training engine. The prediction engine includes a loop exit predictor. The training engine includes a loop exit branch monitor coupled to a loop detector. Based on at least one of a plurality of call return levels, the loop detector of the processor takes a snapshot of a retired predicted block during a first retirement time, compares the snapshot to a subsequent retired predicted block at a second retirement time, and based on the comparison, identifies a loop and loop exit branches within the loop for use by the loop exit branch monitor and the loop exit predictor to determine whether to override a general purpose conditional prediction.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.