Hybrid Register File Layout for Mixed Scalar and Vector Access

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Solution Overview

Problem

Existing register files struggle to efficiently accommodate different data path widths, requiring multiple files and leading to inefficiencies in data processing systems.

Innovation Solution

The solution involves overlapping scalar and vector registers within the same register file structure, distinguishing between globally accessible and locally accessible registers, and implementing a hybrid register file architecture that includes global and local registers, allowing for efficient data access and processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple register files are used to accommodate different data path widths, then data processing capability is improved, but device complexity and area utilization deteriorate

Engineering Contradiction:

Improvedata processing capabilityVSAvoidnumber of register files

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent merges scalar and vector registers into a single unified register file structure, eliminating the need for separate register files for different data path widths. This consolidation reduces device complexity while maintaining the ability to handle both scalar and vector operations efficiently through a common register architecture.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The unified register file is designed to serve multiple functions by accommodating both scalar and vector data paths within the same structure. The register file can dynamically support different data widths and access modes, making it a universal component that replaces multiple specialized register files.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If multiple register files are used for different data path widths, then data processing capability is improved, but area utilization deteriorates

Engineering Contradiction:

Improvedata processing capabilityVSAvoidarea utilization

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

By combining scalar and vector registers into a single register file, the patent eliminates redundant register structures that would occupy separate areas. This merging approach optimizes area utilization by using a single consolidated register file instead of multiple separate files, while preserving full data processing capability for both scalar and vector operations.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If scalar and vector registers are separated into different files, then data path width requirements are met, but register pressure and access efficiency deteriorate

Engineering Contradiction:

Improvedata path width accommodationVSAvoidprocessing efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent merges scalar and vector registers into a unified structure that can accommodate different data path widths through a single register file. This eliminates the need for separate register files while maintaining adaptability to different data widths, thereby improving processing efficiency by reducing register pressure and optimizing access patterns.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The unified register file employs dynamic access mechanisms that can adapt to different data path width requirements in real-time. The register file can dynamically switch between scalar and vector access modes, allowing the system to accommodate varying data path widths without requiring separate static register files for each mode.

Inventive Principle:

Principle #15Dynamics

4Adaptability or versatility

If globally accessible registers are implemented, then flexibility and versatility are improved, but access control complexity and performance deteriorate

Engineering Contradiction:

Improveregister accessibilityVSAvoidaccess performance

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent implements local registers with restricted access rights that can only be read by their owning processing unit, while global registers are accessible to all units. This differentiation of access qualities allows the system to maintain flexibility and versatility through global registers while optimizing access performance by restricting local registers to their dedicated owners, preventing performance degradation from unrestricted access.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12498925B2Register file structures combining vector and scalar data with global and local accesses

Publication Date: 2025.12.16 TEXAS INSTRUMENTS INC

AI summary

The number of registers required is reduced by overlapping scalar and vector registers. This allows increased compiler flexibility when mixing scalar and vector instructions. Local register read ports are reduced by restricting read access. Dedicated predicate registers reduce requirements for general registers, and allows reduction of critical timing paths by allowing the predicate registers to be placed next to the predicate unit.