Intel Corporation

Brent A Schwartz

Subramaniam M Maiyuran

Guei-Yuan Lueh

Darin Starkey

Kaiyu Chen

Jorge E Parra

Supratim Pal

Chandra S Gurram

Ashutosh Garg

Jorge F Garcia Pabon

Shubh Shah

Konrad Trifunovic

Weiyu Chen

Buqi Cheng

Ashwin J Shivani

Pratik J Ashar

Dennis J Siefer

David J Mcnamara

Embodiments provide support for divergent control flow in heterogeneous compute operations on a fused execution unit. On embodiment provides for a processing apparatus comprising a fused execution unit including multiple graphics execution units having a common instruction pointer; logic to serialize divergent function calls by the fused execution unit, the logic configured to compare a call target of execution channels within the fused execution unit and create multiple groups of channels, each group of channels associated with a single call target; and wherein the fused execution unit is to execute a first group of channels via a first execution unit and a second group of channels via a second execution unit.

Divergent control flow for fused EUs

Embodiments described herein provide a graphics processor in which dependency tracking hardware is simplified via the use of compiler provided software scoreboard information. In one embodiment the shader compiler for shader programs is configured to encode software scoreboard information into each instruction. Dependencies can be evaluated by the shader compiler and provided as scoreboard information with each instruction. The hardware can then use the provided information when scheduling instructions. In one embodiment, a software scoreboard synchronization instruction is provided to facilitate software dependency handling within a shader program. Using software to facilitate software dependency handling and synchronization can simplify hardware design, reducing the area consumed by the hardware. In one embodiment, dependencies can be evaluated by the shader compiler instead of the GPU hardware. The compiler can then insert a software scoreboard sync immediate instruction into compiled program code to manage instruction dependencies and prevent data hazards from occurring.

Software scoreboard information and synchronization

Growing community of inventors

Sacramento, CA, United States of America

Brent A Schwartz