Processor Register Renaming Circuit Move Instruction Optimization
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Solution Overview
Problem
Conventional processors face inefficiencies in resource utilization and computational time due to the limited number of physical registers, particularly during move instructions that require data migration between registers.
Innovation Solution
A processor with a renaming circuit that optimizes the assignment of physical registers for move instructions by assigning a first physical register to both the source and destination logical registers, thereby skipping unnecessary data migration operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the processor assigns two different physical registers for source and destination logical registers in move instructions, then data migration can be performed, but processor resource consumption and computational time increase
Solution Approach 1:
The patent merges the assignment of physical registers for source and destination logical registers in move instructions. By assigning the same physical register to both source and destination, the system eliminates unnecessary data migration operations while maintaining correctness, thereby improving processor execution efficiency and reducing resource consumption
Solution Approach 2:
The renaming circuit automatically detects move instructions and applies self-optimization by assigning the same physical register to both source and destination logical registers. This self-service mechanism eliminates redundant data migration operations without requiring external intervention, improving overall processor productivity
2Ease of operation
If the processor performs data migration for every move instruction, then data can be transferred between registers, but computational time and processor resources are consumed
Solution Approach 1:
The patent extracts the essential functionality of move instructions by detecting when source and destination logical registers map to the same physical register. In such cases, the data migration operation is extracted and eliminated, as no actual data transfer is needed, thereby reducing computational time while preserving move instruction functionality
Solution Approach 2:
The system changes the parameter of physical register assignment based on the move instruction characteristics. When the source and destination logical registers correspond to the same physical register, the system changes the assignment parameter to use the same physical register for both, eliminating unnecessary data migration and reducing computational time
3Device complexity
If the processor uses a limited number of physical registers, then hardware complexity is reduced, but register allocation becomes more challenging
Solution Approach 1:
The renaming circuit performs preliminary action by analyzing move instructions before execution and pre-determining the physical register assignment. By detecting move instructions and assigning the same physical register to both source and destination in advance, the system optimizes register allocation efficiency without requiring a large number of physical registers
Data Source
AI summary
A processor and an operating method thereof for renaming a destination logical register of a move instruction are provided. The processor comprises a plurality of physical registers and a renaming circuit. The renaming circuit is coupled to the plurality of physical registers and is configured to receive an instruction sequence and check the instruction sequence. When a current instruction of the instruction sequence comprises the move instruction, the renaming circuit assigns a first physical register, which is assigned to a source logical register of the current instruction previously, to the destination logical register of the current instruction. The first physical register is one of the plurality of physical registers.