Invention Grant
- Patent Title: Loop exit predictor
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Application No.: US16200491Application Date: 2018-11-26
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Publication No.: US11216279B2Publication Date: 2022-01-04
- Inventor: Anthony Jarvis , Thomas Clouqueur
- Applicant: ADVANCED MICRO DEVICES, INC.
- Applicant Address: US CA Santa Clara
- Assignee: ADVANCED MICRO DEVICES, INC.
- Current Assignee: ADVANCED MICRO DEVICES, INC.
- Current Assignee Address: US CA Santa Clara
- Main IPC: G06F9/38
- IPC: G06F9/38 ; G06F9/30 ; G06F9/32

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.
Public/Granted literature
- US20200167164A1 LOOP EXIT PREDICTOR Public/Granted day:2020-05-28
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