Architecture

The following topics illustrate the features of programmable pixel shaders.

• Pixel Shader ALU

Contains a flow diagram showing what happens to register data as it is processed by the pixel shader processor.

• Pixel Shader Texture Addressing

Contains block diagrams to help visualize how texture data is used by the pixel shader processor.

• Counting Instructions

Details the limits on the number of instructions that can be used in a programmable shader.

• Instruction Flow

Highlights the order of the different types of instructions in pixel shaders.

• Instruction Pairing

Describes how some instructions can be paired to minimize execution time.

• Order of Operations

Shows the order or operations for instructions that use source register modifiers, instruction modifiers, source register selectors, and destination register write masks.