Invention Grant
- Patent Title: Multiple stride prefetching
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Application No.: US16140625Application Date: 2018-09-25
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Publication No.: US10769070B2Publication Date: 2020-09-08
- Inventor: Joseph Michael Pusdesris , Miles Robert Dooley , Alexander Cole Shulyak , Krishnendra Nathella , Dam Sunwoo
- Applicant: Arm Limited
- Applicant Address: GB Cambridge
- Assignee: Arm Limited
- Current Assignee: Arm Limited
- Current Assignee Address: GB Cambridge
- Agency: Nixon & Vanderhye P.C.
- Main IPC: G06F12/0862
- IPC: G06F12/0862 ; G06F9/30 ; G06F5/06

Abstract:
Apparatuses and methods for prefetch generation are disclosed. Prefetching circuitry receives addresses specified by load instructions and can cause retrieval of a data value from an address before that address is received. Stride determination circuitry determines stride values as a difference between a current address and a previously received address. Plural stride values corresponding to a sequence of received addresses are determined. Multiple stride storage circuitry stores the plurality of stride values determined by the stride determination circuitry. New address comparison circuitry determines whether a current address corresponds to a matching stride value based on the plurality of stride values stored in the multiple stride storage circuitry. Prefetch initiation circuitry can causes a data value to be retrieved from a further address, wherein the further address is the current address modified by the matching stride value of the plurality of stride values. By the use of multiple stride values, more complex load address patterns can be prefetched.
Public/Granted literature
- US20200097411A1 MULTIPLE STRIDE PREFETCHING Public/Granted day:2020-03-26
Information query
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