Per-instruction overflow interrupt indicator for processor performance
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Solution Overview
Problem
Existing computing environments face inefficiencies in handling overflow conditions during computations, as they often require extensive interrupt handling that consumes hundreds of cycles, leading to performance bottlenecks and increased complexity in user code.
Innovation Solution
A per-instruction overflow interrupt indicator is introduced, allowing user code to determine when to perform interrupt processing, enabling flexibility and the option to bypass interrupt processing, thereby reducing complexity and improving performance by suppressing machine exceptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interrupt processing is performed for every overflow condition, then reliability is improved, but productivity deteriorates due to hundreds of cycles consumed per interrupt
Solution Approach 1:
The patent applies local quality by making the interrupt indicator specific to each individual instruction rather than global. Each instruction can have its own overflow interrupt indicator that independently controls whether overflow conditions trigger interrupts, allowing fine-grained control at the instruction level while maintaining system-wide productivity improvements.
Solution Approach 2:
The patent implements dynamics by allowing the overflow interrupt behavior to change dynamically on a per-instruction basis. The indicator can be set to different values for different instructions, enabling the system to adapt interrupt handling behavior according to specific computational needs rather than using a fixed global setting.
2Reliability
If global overflow interrupt handling is implemented, then reliability is improved, but device complexity increases due to interrupt management overhead
Solution Approach 1:
The patent applies segmentation by dividing the global interrupt management into individual per-instruction indicators. Instead of one global overflow interrupt control mechanism, each instruction has its own indicator bit, segmenting the control responsibility and eliminating the need for complex global interrupt management logic.
Solution Approach 2:
The patent implements self-service by embedding the interrupt control capability directly within each instruction's metadata. Each instruction carries its own overflow interrupt indicator, making the interrupt decision self-determined at the instruction level without requiring external interrupt management complexity.
3Productivity
If per-instruction overflow interrupt indicators are used, then productivity is improved by bypassing interrupts, but ease of operation deteriorates due to indicator management
Solution Approach 1:
The patent applies merging by combining the overflow interrupt indicator with the instruction encoding itself. The indicator is integrated into the instruction format or associated metadata, so that a single instruction object contains both the operational data and the interrupt control information, eliminating the need for separate indicator management structures.
Data Source
AI summary
Instruction interrupt suppression for an overflow condition. An instruction is executed, and a determination is made that an overflow condition occurred. Based on a per-instruction overflow interrupt indicator being set to a defined value, interrupt processing for the overflow condition is performed, and based on the per-instruction overflow interrupt indicator being set to another defined value, the interrupt processing for the overflow condition is bypassed.