GPU Blending Unit Bypassing Multipliers for Zero or One Blend Factors

Solution Overview

Problem

Current graphics processing unit (GPU) blending technologies face inefficiencies in handling various blend factors and data formats, leading to increased area cost and power consumption, especially when dealing with less common blending operations.

Innovation Solution

The proposed solution involves a graphics processing unit with shared resources and staging structures that optimize blending operations by selectively bypassing multiplier operations for zero or one blend factors, and utilizing different data paths for various data formats, allowing for efficient blending across multiple render targets with reduced power and area costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a GPU implements comprehensive blending support for all blend factors and data formats, then versatility is improved, but area cost and power consumption increase

Engineering Contradiction:

Improveblending operation supportVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The blending unit dynamically reconfigures its data paths and operational modes based on the detected data format and blend factor values. The system switches between different operational modes (first mode for normalized integer format, second mode for floating point format) and selectively activates or bypasses multiplier operations based on whether blend factors are zero, one, or other values, optimizing power consumption for each specific blending scenario

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements specialized processing paths for different data formats and blend factor conditions within the blending unit. Different portions of the blending logic are optimized for specific conditions: one path handles normalized integer format with full precision, another handles floating point format, and multiplier operations are selectively applied only when blend factors require them, rather than uniformly applying the same processing to all cases

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If a GPU implements comprehensive blending support for all blend factors and data formats, then versatility is improved, but area cost increases

Engineering Contradiction:

Improveblending operation supportVSAvoidarea cost

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The blending unit is designed as a universal processing structure that can handle multiple data formats (normalized integer and floating point) and multiple blend factor conditions (zero, one, other values) using the same core hardware resources. The single blending unit with reconfigurable data paths replaces what would otherwise require multiple specialized blending units, reducing overall area cost while maintaining comprehensive blending support

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The blending unit dynamically reconfigures its data paths and operational modes based on the detected data format and blend factor values. The system switches between different operational modes (first mode for normalized integer format, second mode for floating point format) and selectively activates or bypasses multiplier operations based on whether blend factors are zero, one, or other values, optimizing power consumption for each specific blending scenario

Inventive Principle:

Principle #15Dynamics

3Productivity

If a GPU optimizes for common blending cases, then productivity is improved, but adaptability to less common operations deteriorates

Engineering Contradiction:

Improveblending throughputVSAvoidless common blending operations

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The blending unit dynamically reconfigures its data paths and operational modes based on the detected data format and blend factor values. The system switches between different operational modes (first mode for normalized integer format, second mode for floating point format) and selectively activates or bypasses multiplier operations based on whether blend factors are zero, one, or other values, optimizing power consumption for each specific blending scenario

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes operational parameters (data path configuration, precision settings, multiplier activation) based on the input data format and blend factor values. By detecting the specific conditions and adjusting parameters accordingly, the system achieves high throughput for common cases while maintaining full support for less common operations

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12020349B2Methods and apparatus for efficient blending in a graphics pipeline

Publication Date: 2024.06.25 SAMSUNG ELECTRONICS CO LTD

AI summary

A method for performing a blending operation in a graphics processing unit may include multiplying a first value and a first blend factor for a component of a render target with a first multiply operation of a multiplier, multiplying a second value and a second blend factor for the component of the render target with a second multiply operation of the multiplier, and adding a first result of the first multiply operation and a second result of the second multiply operation. The method may further include bypassing the multiplier for a first blend factor of substantially zero. The method may further include, for a blend factor of substantially one: bypassing the multiplier, and providing the first value of the component of the render target as a result of the first multiply operation.