Automated RTL Case-Splitting Detection for Timing Violations
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Solution Overview
Problem
Current semiconductor design technologies face challenges in detecting and implementing case-splitting opportunities at the Register Transfer Level (RTL), which are crucial for optimizing hardware designs without causing timing violations, due to the expertise required for manual detection and implementation.
Innovation Solution
An automated technique is introduced to detect case-splitting opportunities in RTL, integrating this method into hardware design tools to facilitate the generation of designs that avoid timing issues, enabling efficient optimization of critical paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual detection and implementation of case-splitting opportunities is performed, then design expertise can identify optimization possibilities, but the process requires significant expert knowledge and time investment
Solution Approach 1:
The system performs automated detection of case-splitting opportunities using synthesis tools and analysis circuits that independently identify optimization possibilities in the RTL design, eliminating the need for manual expert intervention while maintaining high detection accuracy
Solution Approach 2:
Manual expert analysis is replaced with automated electronic analysis circuits and software tools that systematically examine the RTL design to detect case-splitting opportunities, converting a manual intellectual process into an automated computational system
2Speed
If case-splitting is implemented to optimize critical paths, then timing constraints can be improved, but the design complexity increases due to multiple disjoint paths
Solution Approach 1:
The critical path is divided into multiple disjoint paths with different branch thresholds, allowing each segment to be optimized independently for timing while maintaining overall system functionality through selective activation of paths
Solution Approach 2:
The system dynamically selects which disjoint path to activate based on input conditions and timing requirements, enabling flexible optimization where the active path changes according to operational context rather than using a fixed complex structure
3Productivity
If automated detection tools are integrated into hardware design tools, then productivity is improved, but the complexity of the design tool increases
Solution Approach 1:
The synthesis tool is enhanced with multiple functions including case-splitting detection, timing analysis, and optimization recommendation capabilities, allowing a single tool to perform various design analysis tasks rather than requiring separate specialized tools for each function
Solution Approach 2:
The case-splitting detection functionality is merged with existing synthesis and analysis tools, integrating the detection process into the normal design flow rather than requiring a separate standalone tool, thereby improving productivity while managing tool complexity through unified architecture
Data Source
AI summary
Described herein is a technique for automated detection of case-splitting opportunities in RTL. The techniques described herein facilitate the integration of case-splitting into a hardware design tool flow, allowing the generation of hardware designs that do not suffer from timing violations. One embodiment provides a method comprising analyzing a first hardware description in a hardware description language to identify a critical path in a circuit represented by the hardware description, automatically detecting a case-splitting opportunity within the critical path, generating hardware description language for a case split having determined operator domain restrictions, and outputting a second hardware description including the hardware description language for the case split, wherein the second hardware description has a reduced operator hardware cost for the critical path relative to the first hardware description.