Completeness check
JP2025520568A5Pending Publication Date: 2026-06-03ARM LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- ARM LTD
- Filing Date
- 2023-06-01
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
Existing methods for detecting intermittent failures in processing circuits, such as wayward cores, are either costly in terms of execution overhead or require expensive replicated calculation logic, making them inefficient and power-intensive.
Method used
Incorporating an approximation circuit within the processing circuit to calculate an approximate result of a computation, which is then compared with the exact result to detect errors using a deviation threshold, thereby reducing the need for redundant execution or replicated cores.
Benefits of technology
This approach provides a quick and efficient method to detect errors in processing circuits by comparing approximate and exact results, reducing power and area requirements while maintaining performance.
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Smart Images
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Abstract
The apparatus has a processing circuit for executing instructions. The processing circuit has a computing circuit that calculates a result of a computation in response to one or more instructions that require the computation to be executed, and an approximation circuit that, in response to the one or more instructions and independently of the computing circuit, calculates an approximate result of the computation. The processing circuit also has a completeness check circuit that performs a completeness check by comparing the result of the computation executed by the computing circuit with the approximate result of the computation executed by the approximation circuit. The completeness check circuit detects an error in the processing circuit when it is determined that the difference between the result of the computation and the approximate result of the computation is greater than a deviation threshold.
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