Microprocessor NOP Slide Detector Hardware State Machine
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Solution Overview
Problem
Microprocessor designers face challenges in achieving optimal performance across various software applications due to the need for configuration settings that often prioritize one application over others, leading to suboptimal performance for other applications.
Innovation Solution
A microprocessor with an instruction cache and a hardware state machine that detects continuous sequences of N no-operation (NOP) instructions, suspending instruction fetching and execution in response, allowing for dynamic reconfiguration to optimize performance based on running applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If configuration settings are optimized for one software application, then performance for that application is improved, but performance for other applications deteriorates
Solution Approach 1:
The patent implements dynamic reconfiguration of microprocessor characteristics through a hardware state machine that can switch between different configuration modes at runtime. The microprocessor transitions from static configuration to dynamic configuration based on detected instruction patterns, allowing optimal performance for different software applications without requiring manual reconfiguration or compromising adaptability.
Solution Approach 2:
The patent changes physical or operational parameters of the microprocessor by detecting specific instruction patterns (such as NOP sequences) and dynamically adjusting configuration settings. This allows the microprocessor to modify its operational characteristics in response to different workload requirements, achieving both high performance and broad adaptability across multiple software applications.
2Productivity
If a hardware state machine is added to detect NOP sequences, then performance optimization capability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the NOP detection function as a separate, dedicated hardware state machine component within the microprocessor. This specialized detection unit operates independently to identify specific instruction patterns and triggers configuration changes without requiring complex general-purpose control logic, thereby achieving performance optimization with minimal added complexity.
Solution Approach 2:
The hardware state machine automatically detects NOP sequences and triggers reconfiguration events without requiring external intervention or complex software management. The microprocessor self-manages its configuration optimization by having the state machine monitor instruction streams and initiate parameter changes autonomously, reducing the overall system complexity while maintaining advanced optimization capabilities.
Data Source
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AI summary
A microprocessor includes an instruction cache and a hardware state machine configured to detect a continuous sequence ofN no operation (NOP) instructions within a stream of instruction bytes fetched from the instruction cache, wherein N is greater than zero. The microprocessor is configured to suspend fetching and executing instructions from the instruction cache in response to detecting the continuous sequence of N NOP instructions.